Cancer is a major public health issue in most of countries, including China. Accurate and valid information on cancer incidence, mortality, survival and relevant factors is irreplaceable for cancer prevention and cont...Cancer is a major public health issue in most of countries, including China. Accurate and valid information on cancer incidence, mortality, survival and relevant factors is irreplaceable for cancer prevention and control. Since the national program of cancer registry was launched by the Ministry of Health of China in 2008, the National Central Cancer Registry (NCCR) has been releasing the cancer incidence and mortality based on the data collected from cancer registries supported by the program. The cancer statistics provide current data from registered areas and aims to accurately reflect the cancer burden and epidemic in China. In 2014, the NCCR collected data for calendar year 2011 from 234 registries. After comprehensive quality' evaluation, data from 177 registries have been selected as sources of the reports reflecting cancer incidence and mortaliD, in the registration areas in 2011. These reports are the updated cancer statistics so far, covering much more registries and a hig population.展开更多
Introduction: The National Central Cancer Registry(NCCR) of China collected population-based cancer registration data from all cancer registries in China. This study aimed to compile national cancer incidences and mor...Introduction: The National Central Cancer Registry(NCCR) of China collected population-based cancer registration data from all cancer registries in China. This study aimed to compile national cancer incidences and mortalities in 2011 and estimate cancer incident new cases and cancer deaths.Methods: In 2014, there were 234 cancer registries that submitted records of new cancer cases and cancer deaths that occurred in 2011 to the NCCR. All datasets were evaluated based on the criteria of data quality of the NCCR. The data of 177 registries was of suicient quality and was compiled to evaluate cancer statistics in 2011. The pooled data were stratiied by area, sex, age group, and cancer type. Cancer incident cases and deaths were estimated using age-standardized rates(ASR) and the Chinese population. All incidences and mortalities were age-standardized to the 2000 Chinese standard population and Segi's population.Results: The estimates of new cancer incident cases and cancer deaths were 3,372,175 and 2,113,048 in 2011, respectively. The crude incidence was 250.28/1,00,000(277.77/1,00,000 for males and 221.37/1,00,000 for females). The ASRs of incidence by the Chinese standard population(ASRIC) and by the world standard population(ASRIW) were 186.34/1,00,000 and 182.76/1,00,000, respectively, with a cumulative incidence(0–74 years old) of 21.20%. Cancers of the lung, female breast, stomach, liver, colorectum, esophagus, cervix, uterus, prostate, and ovary were the most common cancers, accounting for approximately 75% of all new cancer cases. Lung, liver, gastric, esophageal, colorectal, female breast, pancreatic, brain, and cervical cancers and leukemia were the leading causes of cancer death, accounting for approximately 80% of all cancer deaths. Cancer incidence, mortality, and spectrum were all diferent between urban and rural areas and between males and females.Conclusions: The population covered by the cancer registries greatly increased from 2010 to 2011. The data quality and representativeness of cancer registries have gradually improved. Cancer registries have an irreplaceable role in research on cancer prevention and control. The disease burden of cancer is increasing, and the health department must implement efective measures to contain the increased cancer burden in China.展开更多
The much-anticipated change in the practice of organ donation and transplantation in China is now underway and affirmed by an important Hangzhou Resolution promulgated at the 2013 China Transplant Congress.Support of ...The much-anticipated change in the practice of organ donation and transplantation in China is now underway and affirmed by an important Hangzhou Resolution promulgated at the 2013 China Transplant Congress.Support of the National Health and Family Planning Commission On October 29,2013,in a meeting of the National Health and Family Planning Commission (NHFPC)officials with Jie-Fu Huang,Head of National Organ Transplant Committee(OTC), Hai-Bo Wang,Director of China Organ Transplant Response System (COTRS)展开更多
We have updated the lateral variations of the quality factor Q0(Q at 1 Hz) beneath the crust of North China using ML amplitude tomography with near three times data.The data were selected from the Annual Bulletin of...We have updated the lateral variations of the quality factor Q0(Q at 1 Hz) beneath the crust of North China using ML amplitude tomography with near three times data.The data were selected from the Annual Bulletin of Chinese Earthquakes(ABCE) in 1985-2009,including 26 283 ML amplitude readings from 4 204 events recorded by 38 stations.The result is similar with previous research but has higher resolution.Estimated Q0 values are consistent with tectonic and topographic structure in North China.Q0 is low in the active tectonic regions having many faults,such as Bohai bay,North China basin,the Shanxi and Yinchuan grabens,while it is high in the stable Ordos craton.Q0 values are low in several topographically low-lying areas,such as the North China,Taikang-Hefei,and Subei-Huanghai Sea basins,whereas it is high in mountainous and uplift regions exhibiting surface expressions of crystalline basement rocks:the Yinshan,Yanshan,Taihang,Qinling and Dabie mountains,Luxi and Jiaoliao uplifts.Quality factor estimates are also consistent with Pn and Sn velocity patterns.High velocity values in general correspond with high Q0 and vice versa.This coincides with a common temperature influence in the crust and uppermost mantle.展开更多
This review describes the history of taxonomic research on scorpions and provides an updated checklist and key of the scorpions currently known in China. This checklist is based on a thorough review of the extant lite...This review describes the history of taxonomic research on scorpions and provides an updated checklist and key of the scorpions currently known in China. This checklist is based on a thorough review of the extant literatures on scorpion species whose presence has been confirmed in China through field expeditions and examination of scorpion collections, excepting a few members that have no clear distribution or are currently in doubt. Totally, the scorpion fauna of China consists of 53 species and subspecies belonging to 12 genera crossing five families, with 33 species(62.3%) and one genus being recorded as endemic. Additionally, identification key and the distribution of scorpions from China are provided.展开更多
Telerobotic surgery is the most advanced development in the field of minimally invasive surgery. The da Vinci surgical system, which is currently the most widely used telerobotic device, was approved by the Food and D...Telerobotic surgery is the most advanced development in the field of minimally invasive surgery. The da Vinci surgical system, which is currently the most widely used telerobotic device, was approved by the Food and Drug Administration of the United States of America for clinical use in all abdominal operations in July 2000. The first da Vinci surgical system in China was installed in November 2005 at our institution. We herein report the first telerobotic-assisted laparoscopic abdominoperineal resection using the 3-arm da Vinci surgical system for low rectal cancer in Hong Kong and China, which was performed in August 2006. The operative time and blood loss were 240 min and 200 mL, respectively. There was no complication, and the patient was discharged on postoperative day five. An updated review of published literature on telerobotic-assisted colorectal surgery is included in this report, with special emphasis on its advantages and limitations.展开更多
In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are prese...In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are presented. These include the prevalence of moderate-to-vigorous physical activity (MVPA).展开更多
Hangzhou,China,which is among the 15 largest cities in China,with an urban population of more than 7 million people,was the site of the Conference on Refractories International(CRI-18),October 17-19,2018.In Hangzhou,t...Hangzhou,China,which is among the 15 largest cities in China,with an urban population of more than 7 million people,was the site of the Conference on Refractories International(CRI-18),October 17-19,2018.In Hangzhou,there is beautiful scenery with West Lake,and an impressive skyline,with many sky-scrapers(see Figure 1).In China,people know that:'In heaven there is Paradise,but on earth there is Hangzhou and Suzhou'.展开更多
Background:Updated systematic statistics on lung cancer are the underpinning cornerstones for formulating prevention and control strategies for the disease.The incidence and mortality data of lung cancer in China in 2...Background:Updated systematic statistics on lung cancer are the underpinning cornerstones for formulating prevention and control strategies for the disease.The incidence and mortality data of lung cancer in China in 2016 were estimated,and also used to analyze the temporal trends of lung cancer from 2000 up to 2016 in this study.Methods:The burden of lung cancer in China in 2016 was estimated using data from 487 cancer registries,which were abstracted from the database of the National Cancer Center of China(NCC).The temporal trends were estimated with the data of 2000 to 2016 from 22 cancer registries.Results:About 828,100 new lung cancer cases and 657,000 lung cancer deaths were estimated in China in 2016.The crude incidence and mortality rates in the eastern region were the highest nationwide.The incidence and mortality of lung cancer increased with age,and most of the new cases occurred in the age group of over 60 years.The age-standardized incidence increased by about 0.8%per year during 2000 to 2016,especially in woman,whose annual increase rate reached 2.1%.The age-standardized mortality rate decreased by about 0.6%per year,with a decrease of 1.3%per year in urban areas and an increase of 2.3%per year in rural areas.The numbers of new cases and deaths increased by 162.6%and 123.6%,respectively,during 2000 to 2016,which can be explained mainly by the change of the age structure.Conclusions:The burden of lung cancer is serious in China,and increased especially rapidly for women in rural areas.The disease is expected to threaten the lives of more people in the future due to factors such as aging and population growth.Lung cancer prevention and control strategies and resources should be leveraged toward women and rural areas in the future.展开更多
The aim of this study is to investigate the impacts of the sampling strategy of landslide and non-landslide on the performance of landslide susceptibility assessment(LSA).The study area is the Feiyun catchment in Wenz...The aim of this study is to investigate the impacts of the sampling strategy of landslide and non-landslide on the performance of landslide susceptibility assessment(LSA).The study area is the Feiyun catchment in Wenzhou City,Southeast China.Two types of landslides samples,combined with seven non-landslide sampling strategies,resulted in a total of 14 scenarios.The corresponding landslide susceptibility map(LSM)for each scenario was generated using the random forest model.The receiver operating characteristic(ROC)curve and statistical indicators were calculated and used to assess the impact of the dataset sampling strategy.The results showed that higher accuracies were achieved when using the landslide core as positive samples,combined with non-landslide sampling from the very low zone or buffer zone.The results reveal the influence of landslide and non-landslide sampling strategies on the accuracy of LSA,which provides a reference for subsequent researchers aiming to obtain a more reasonable LSM.展开更多
Background:The National Cancer Center(NCC)of China regularly reports the nationwide statistics on cancer incidence and mortality in China.The International Agency for Research on Cancer(IARC)calculates and publishes t...Background:The National Cancer Center(NCC)of China regularly reports the nationwide statistics on cancer incidence and mortality in China.The International Agency for Research on Cancer(IARC)calculates and publishes the cancer burden of countries around the world every two years.To ensure consistency between the actual surveillance data in China and the data published by IARC,NCC has received approval from the National Health Commission and IARC to simultaneously release the cancer burden data for China in GLOBOCAN 2022.Methods:There were a total of 700 registries reporting high-quality data on cancer incidence and mortality across China in 2018,of which 106 registries with continuous monitoring from 2010 to 2018 were used to establish an age-period-cohort model to simulate the trend of cancer incidence and mortality and to estimate the incidence and mortality in China in 2022.In addition,we analyzed the temporal trends of age-standardized cancer incidence and mortality from 2000 to 2018 using data from 22 continuous cancer registries.Results:It was estimated about 4,824,700 new cancer cases and 2,574,200 new cancer deaths occurred in China in 2022.Cancers of the lung,colon-rectum,thyroid,liver and stomach were the top five cancer types,accounting for 57.42%of new cancer cases.Cancers of the lung,liver,stomach,colon-rectum and esophagus were the five leading causes of cancer deaths,accounting for 67.50%of total cancer deaths.The crude rate and age-standardized incidence rate(ASIR)were 341.75 per 100,000 and 201.61 per 100,000,respectively.The crude mortality rate was 182.34 per 100,000 and the age-standardized mortality rate(ASMR)was 96.47 per 100,000.The ASIR of all cancers combined increased by approximately 1.4%per year during 2000–2018,while the ASMR decreased by approximately 1.3%per year.We observed decreasing trends in ASIR and ASMR for cancers of the esophagus,stomach,and liver,whereas the ASIR increased significantly for cancers of the thyroid,prostate,and cervix.Conclusions:Cancer remains a major public health concern in China,with a cancer profile that reflects the coexistence of developed and developing regions.Sustained implementation of prevention and control measures has resulted in significant reductions in the incidence and mortality rates of certain historically high incidence cancers,such as esophageal,stomach and liver cancers.Adherence to the guidelines of the Healthy China Action Plan and the Cancer Prevention and Control Action Plan,along with continued efforts in comprehensive risk factor control,cancer screening,early diagnosis and treatment,and standardization of diagnostic and therapeutic protocols,are key strategies to effectively mitigate the increasing cancer burden by 2030.展开更多
Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even death.China has the largest population of patients with traumatic spinal cord injury.Previous studies of traumatic ...Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even death.China has the largest population of patients with traumatic spinal cord injury.Previous studies of traumatic spinal cord injury in China have mostly been regional in scope;national-level studies have been rare.To the best of our knowledge,no national-level study of treatment status and economic burden has been performed.This retrospective study aimed to examine the epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China at the national level.We included 13,465 traumatic spinal cord injury patients who were injured between January 2013 and December 2018 and treated in 30 hospitals in 11 provinces/municipalities representing all geographical divisions of China.Patient epidemiological and clinical features,treatment status,and total and daily costs were recorded.Trends in the percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department and cost of care were assessed by annual percentage change using the Joinpoint Regression Program.The percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department did not significantly change overall(annual percentage change,-0.5%and 2.1%,respectively).A total of 10,053(74.7%)patients underwent surgery.Only 2.8%of patients who underwent surgery did so within 24 hours of injury.A total of 2005(14.9%)patients were treated with high-dose(≥500 mg)methylprednisolone sodium succinate/methylprednisolone(MPSS/MP);615(4.6%)received it within 8 hours.The total cost for acute traumatic spinal cord injury decreased over the study period(-4.7%),while daily cost did not significantly change(1.0%increase).Our findings indicate that public health initiatives should aim at improving hospitals’ability to complete early surgery within 24 hours,which is associated with improved sensorimotor recovery,increasing the awareness rate of clinical guidelines related to high-dose MPSS/MP to reduce the use of the treatment with insufficient evidence.展开更多
A more resilient livelihood is increasingly recognized as an efficient way to improve vulnerable households’food security and optimize their dietary decisions.This study quantifies rural household resilience in weste...A more resilient livelihood is increasingly recognized as an efficient way to improve vulnerable households’food security and optimize their dietary decisions.This study quantifies rural household resilience in western China,identifies the three pillars(absorptive capacity,adaptive capacity,and transformative capacity)contribution to resilience,and then establishes the estimated Resilience Capacity Index(RCI)linked with food security and dietary diversity supported by the multiple indicator multiple cause(MIMIC)model.Results show that,despite geographical heterogeneity,the RCI consistently increased from 2015 to 2021.Households with a higher RCI inheriting better capacity to deal with risk and shocks are significantly and positively correlated with increasing food expenditure and diversifying food choices.It can be because resilient households will allocate more money to food expenditure instead of saving for livelihood uncertainty.Thus,policymakers can provide more incentives for rural households to adopt more dynamic and effective risk management strategies.This,in turn,could yield positive spillover effects by preventing human capital loss associated with dietary-related chronic diseases and mortality.展开更多
This study examines the spatio-temporal characteristics of heavy precipitation forecasts in eastern China from the European Centre for Medium-Range Weather Forecasts(ECMWF) using the time-domain version of the Method ...This study examines the spatio-temporal characteristics of heavy precipitation forecasts in eastern China from the European Centre for Medium-Range Weather Forecasts(ECMWF) using the time-domain version of the Method for Object-based Diagnostic Evaluation(MODE-TD). A total of 23 heavy rainfall cases occurring between 2018 and 2021 are selected for analysis. Using Typhoon “Rumbia” as a case study, the paper illustrates how the MODE-TD method assesses the overall simulation capability of models for the life history of precipitation systems. The results of multiple tests with different parameter configurations reveal that the model underestimates the number of objects’ forecasted precipitation tracks, particularly at smaller radii. Additionally, the analysis based on centroid offset and area ratio tests for different classified precipitation objects indicates that the model performs better in predicting large-area, fast-moving, and longlifespan precipitation objects. Conversely, it tends to have less accurate predictions for small-area, slow-moving, and shortlifespan precipitation objects. In terms of temporal characteristics, the model overestimates the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. In terms of temporal characteristics, the model tends to overestimate the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. Overall, the model provides more accurate predictions for the duration and dissipation of precipitation objects with large-area or long-lifespan(such as typhoon precipitation) while having large prediction errors for precipitation objects with small-area or short-lifespan. Furthermore, the model’s simulation results regarding the generation of precipitation objects show that it performs relatively well in simulating the generation of large-area and fast-moving precipitation objects. However, there are significant differences in the forecasted generation of small-area and slow-moving precipitation objects after 9 hours.展开更多
Over the past few decades,the Internet has rapidly diffused across China.The spread of the Internet has had a profound economic and social impact on Chinese rural areas.Existing research shows that Internet access sig...Over the past few decades,the Internet has rapidly diffused across China.The spread of the Internet has had a profound economic and social impact on Chinese rural areas.Existing research shows that Internet access significantly impacts agricultural production and improves smallholder farmers’income.Beyond these,the Internet can affect other dimensions of social welfare.However,research about the impact of Internet access on dietary quality in rural China remains scarce.This study utilizes multi-period panel data from Fixed Observation Point in rural China from 2009 to 2015 to estimate the impact of Internet access on dietary quality and food consumption of rural households and conducts a causal analysis.Regression models with time and household fixed effects allow robust estimation while reducing potential issues of unobserved heterogeneity.The estimates show that Internet access has significantly increased rural household dietary quality(measured by the Chinese Diet Balance Index).Further research finds that Internet access has increased the consumption of animal products,such as aquatic and dairy products.We also examine the underlying mechanisms.Internet access improves dietary quality and food consumption mainly through increasing household income and food expenditure.These results encourage the promotion of Internet access as a valuable tool for nutritional improvements,especially in rural areas.展开更多
Boehmeria nivea var.strigosa Zeng Y.Wu&Y.Zhao,a new variety of B.nivea(Urticaceae)from Southwest China,is here described based on evidence from morphology and molecular phylogeny.This new variety is mainly charact...Boehmeria nivea var.strigosa Zeng Y.Wu&Y.Zhao,a new variety of B.nivea(Urticaceae)from Southwest China,is here described based on evidence from morphology and molecular phylogeny.This new variety is mainly characterized by its green abaxial leaf blade,partly connate stipules,and densely patent strigose hairs on stems and potioles.The phylogenetic analysis based on rbc L,nrDNA and rbc L+nrDNA datasets,revealed that all individuals of B.nivea var.strigosa formed a monophyletic group.The conservation status of B.nivea var.strigosa is assessed as“Near Threatened”(NT)according to IUCN evaluation criteria.The discovery of this new variety is not only crucial for the taxonomy of ramie,but also provides reference for the exploration and utilization of ramie.展开更多
Various land use and land cover(LULC)products have been produced over the past decade with the development of remote sensing technology.Despite the differences in LULC classification schemes,there is a lack of researc...Various land use and land cover(LULC)products have been produced over the past decade with the development of remote sensing technology.Despite the differences in LULC classification schemes,there is a lack of research on assessing the accuracy of their application to croplands in a unified framework.Thus,this study evaluated the spatial and area accuracies of cropland classification for four commonly used global LULC products(i.e.,MCD12Q1V6,GlobCover2009,FROM-GLC and GlobeLand30)based on the harmonised FAO criterion,and quantified the relationships between four factors(i.e.,slope,elevation,field size and crop system)and cropland classification agreement.The validation results indicated that MCD12Q1 and GlobeLand30 performed well in cropland classification regarding spatial consistency,with overall accuracies of 94.90 and 93.52%,respectively.The FROMGLC showed the worst performance,with an overall accuracy of 83.17%.Overlaying the cropland generated by the four global LULC products,we found the proportions of complete agreement and disagreement were 15.51 and 44.72% for the cropland classification,respectively.High consistency was mainly observed in the Northeast China Plain,the Huang-Huai-Hai Plain and the northern part of the Middle-lower Yangtze Plain,China.In contrast,low consistency was detected primarily on the eastern edge of the northern and semiarid region,the Yunnan-Guizhou Plateau and southern China.Field size was the most important factor for mapping cropland.For area accuracy,compared with China Statistical Yearbook data at the provincial scale,the accuracies of different products in descending order were:GlobeLand30,FROM-GLC,MCD12Q1,and GlobCover2009.The cropland classification schemes mainly caused large area deviations among the four products,and they also resulted in the different ranks of spatial accuracy and area accuracy among the four products.Our results can provide valuable suggestions for selecting cropland products at the national or provincial scale and help cropland mapping and reconstruction,which is essential for food security and crop management,so they can also contribute to achieving the Sustainable Development Goals issued by the United Nations.展开更多
文摘Cancer is a major public health issue in most of countries, including China. Accurate and valid information on cancer incidence, mortality, survival and relevant factors is irreplaceable for cancer prevention and control. Since the national program of cancer registry was launched by the Ministry of Health of China in 2008, the National Central Cancer Registry (NCCR) has been releasing the cancer incidence and mortality based on the data collected from cancer registries supported by the program. The cancer statistics provide current data from registered areas and aims to accurately reflect the cancer burden and epidemic in China. In 2014, the NCCR collected data for calendar year 2011 from 234 registries. After comprehensive quality' evaluation, data from 177 registries have been selected as sources of the reports reflecting cancer incidence and mortaliD, in the registration areas in 2011. These reports are the updated cancer statistics so far, covering much more registries and a hig population.
文摘Introduction: The National Central Cancer Registry(NCCR) of China collected population-based cancer registration data from all cancer registries in China. This study aimed to compile national cancer incidences and mortalities in 2011 and estimate cancer incident new cases and cancer deaths.Methods: In 2014, there were 234 cancer registries that submitted records of new cancer cases and cancer deaths that occurred in 2011 to the NCCR. All datasets were evaluated based on the criteria of data quality of the NCCR. The data of 177 registries was of suicient quality and was compiled to evaluate cancer statistics in 2011. The pooled data were stratiied by area, sex, age group, and cancer type. Cancer incident cases and deaths were estimated using age-standardized rates(ASR) and the Chinese population. All incidences and mortalities were age-standardized to the 2000 Chinese standard population and Segi's population.Results: The estimates of new cancer incident cases and cancer deaths were 3,372,175 and 2,113,048 in 2011, respectively. The crude incidence was 250.28/1,00,000(277.77/1,00,000 for males and 221.37/1,00,000 for females). The ASRs of incidence by the Chinese standard population(ASRIC) and by the world standard population(ASRIW) were 186.34/1,00,000 and 182.76/1,00,000, respectively, with a cumulative incidence(0–74 years old) of 21.20%. Cancers of the lung, female breast, stomach, liver, colorectum, esophagus, cervix, uterus, prostate, and ovary were the most common cancers, accounting for approximately 75% of all new cancer cases. Lung, liver, gastric, esophageal, colorectal, female breast, pancreatic, brain, and cervical cancers and leukemia were the leading causes of cancer death, accounting for approximately 80% of all cancer deaths. Cancer incidence, mortality, and spectrum were all diferent between urban and rural areas and between males and females.Conclusions: The population covered by the cancer registries greatly increased from 2010 to 2011. The data quality and representativeness of cancer registries have gradually improved. Cancer registries have an irreplaceable role in research on cancer prevention and control. The disease burden of cancer is increasing, and the health department must implement efective measures to contain the increased cancer burden in China.
基金The Peking Union Medical College has received grant support from the China Medical Board for the time,meetings,and travel associated with the work described in this manuscript
文摘The much-anticipated change in the practice of organ donation and transplantation in China is now underway and affirmed by an important Hangzhou Resolution promulgated at the 2013 China Transplant Congress.Support of the National Health and Family Planning Commission On October 29,2013,in a meeting of the National Health and Family Planning Commission (NHFPC)officials with Jie-Fu Huang,Head of National Organ Transplant Committee(OTC), Hai-Bo Wang,Director of China Organ Transplant Response System (COTRS)
基金supported by the Chinese Academy of Sciences(Grant No.KZCX2-EW-QN102)the National Natural Science Foundation of China(Nos.41074041,90814002 and 40674031)
文摘We have updated the lateral variations of the quality factor Q0(Q at 1 Hz) beneath the crust of North China using ML amplitude tomography with near three times data.The data were selected from the Annual Bulletin of Chinese Earthquakes(ABCE) in 1985-2009,including 26 283 ML amplitude readings from 4 204 events recorded by 38 stations.The result is similar with previous research but has higher resolution.Estimated Q0 values are consistent with tectonic and topographic structure in North China.Q0 is low in the active tectonic regions having many faults,such as Bohai bay,North China basin,the Shanxi and Yinchuan grabens,while it is high in the stable Ordos craton.Q0 values are low in several topographically low-lying areas,such as the North China,Taikang-Hefei,and Subei-Huanghai Sea basins,whereas it is high in mountainous and uplift regions exhibiting surface expressions of crystalline basement rocks:the Yinshan,Yanshan,Taihang,Qinling and Dabie mountains,Luxi and Jiaoliao uplifts.Quality factor estimates are also consistent with Pn and Sn velocity patterns.High velocity values in general correspond with high Q0 and vice versa.This coincides with a common temperature influence in the crust and uppermost mantle.
基金supported by grants from the National Natural Sciences Foundation of China(31071942)the Basic Project of Ministry of Science and Technology of China(2007FY210800)the 973 program(2010CB529800)
文摘This review describes the history of taxonomic research on scorpions and provides an updated checklist and key of the scorpions currently known in China. This checklist is based on a thorough review of the extant literatures on scorpion species whose presence has been confirmed in China through field expeditions and examination of scorpion collections, excepting a few members that have no clear distribution or are currently in doubt. Totally, the scorpion fauna of China consists of 53 species and subspecies belonging to 12 genera crossing five families, with 33 species(62.3%) and one genus being recorded as endemic. Additionally, identification key and the distribution of scorpions from China are provided.
文摘Telerobotic surgery is the most advanced development in the field of minimally invasive surgery. The da Vinci surgical system, which is currently the most widely used telerobotic device, was approved by the Food and Drug Administration of the United States of America for clinical use in all abdominal operations in July 2000. The first da Vinci surgical system in China was installed in November 2005 at our institution. We herein report the first telerobotic-assisted laparoscopic abdominoperineal resection using the 3-arm da Vinci surgical system for low rectal cancer in Hong Kong and China, which was performed in August 2006. The operative time and blood loss were 240 min and 200 mL, respectively. There was no complication, and the patient was discharged on postoperative day five. An updated review of published literature on telerobotic-assisted colorectal surgery is included in this report, with special emphasis on its advantages and limitations.
文摘In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are presented. These include the prevalence of moderate-to-vigorous physical activity (MVPA).
文摘Hangzhou,China,which is among the 15 largest cities in China,with an urban population of more than 7 million people,was the site of the Conference on Refractories International(CRI-18),October 17-19,2018.In Hangzhou,there is beautiful scenery with West Lake,and an impressive skyline,with many sky-scrapers(see Figure 1).In China,people know that:'In heaven there is Paradise,but on earth there is Hangzhou and Suzhou'.
基金supported by CAMS Innovation Fund for Medical Sciences(grant number 2021-I2M-1-011)the Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences(grant number 2019PT320027).
文摘Background:Updated systematic statistics on lung cancer are the underpinning cornerstones for formulating prevention and control strategies for the disease.The incidence and mortality data of lung cancer in China in 2016 were estimated,and also used to analyze the temporal trends of lung cancer from 2000 up to 2016 in this study.Methods:The burden of lung cancer in China in 2016 was estimated using data from 487 cancer registries,which were abstracted from the database of the National Cancer Center of China(NCC).The temporal trends were estimated with the data of 2000 to 2016 from 22 cancer registries.Results:About 828,100 new lung cancer cases and 657,000 lung cancer deaths were estimated in China in 2016.The crude incidence and mortality rates in the eastern region were the highest nationwide.The incidence and mortality of lung cancer increased with age,and most of the new cases occurred in the age group of over 60 years.The age-standardized incidence increased by about 0.8%per year during 2000 to 2016,especially in woman,whose annual increase rate reached 2.1%.The age-standardized mortality rate decreased by about 0.6%per year,with a decrease of 1.3%per year in urban areas and an increase of 2.3%per year in rural areas.The numbers of new cases and deaths increased by 162.6%and 123.6%,respectively,during 2000 to 2016,which can be explained mainly by the change of the age structure.Conclusions:The burden of lung cancer is serious in China,and increased especially rapidly for women in rural areas.The disease is expected to threaten the lives of more people in the future due to factors such as aging and population growth.Lung cancer prevention and control strategies and resources should be leveraged toward women and rural areas in the future.
文摘The aim of this study is to investigate the impacts of the sampling strategy of landslide and non-landslide on the performance of landslide susceptibility assessment(LSA).The study area is the Feiyun catchment in Wenzhou City,Southeast China.Two types of landslides samples,combined with seven non-landslide sampling strategies,resulted in a total of 14 scenarios.The corresponding landslide susceptibility map(LSM)for each scenario was generated using the random forest model.The receiver operating characteristic(ROC)curve and statistical indicators were calculated and used to assess the impact of the dataset sampling strategy.The results showed that higher accuracies were achieved when using the landslide core as positive samples,combined with non-landslide sampling from the very low zone or buffer zone.The results reveal the influence of landslide and non-landslide sampling strategies on the accuracy of LSA,which provides a reference for subsequent researchers aiming to obtain a more reasonable LSM.
基金supported by the CAMS Innovation Fund for Medical Sciences(grant numbers:2021-I2M-1-010,2021-I2M-1-046,2021-I2M-1-011,2021-I2M-1-023).
文摘Background:The National Cancer Center(NCC)of China regularly reports the nationwide statistics on cancer incidence and mortality in China.The International Agency for Research on Cancer(IARC)calculates and publishes the cancer burden of countries around the world every two years.To ensure consistency between the actual surveillance data in China and the data published by IARC,NCC has received approval from the National Health Commission and IARC to simultaneously release the cancer burden data for China in GLOBOCAN 2022.Methods:There were a total of 700 registries reporting high-quality data on cancer incidence and mortality across China in 2018,of which 106 registries with continuous monitoring from 2010 to 2018 were used to establish an age-period-cohort model to simulate the trend of cancer incidence and mortality and to estimate the incidence and mortality in China in 2022.In addition,we analyzed the temporal trends of age-standardized cancer incidence and mortality from 2000 to 2018 using data from 22 continuous cancer registries.Results:It was estimated about 4,824,700 new cancer cases and 2,574,200 new cancer deaths occurred in China in 2022.Cancers of the lung,colon-rectum,thyroid,liver and stomach were the top five cancer types,accounting for 57.42%of new cancer cases.Cancers of the lung,liver,stomach,colon-rectum and esophagus were the five leading causes of cancer deaths,accounting for 67.50%of total cancer deaths.The crude rate and age-standardized incidence rate(ASIR)were 341.75 per 100,000 and 201.61 per 100,000,respectively.The crude mortality rate was 182.34 per 100,000 and the age-standardized mortality rate(ASMR)was 96.47 per 100,000.The ASIR of all cancers combined increased by approximately 1.4%per year during 2000–2018,while the ASMR decreased by approximately 1.3%per year.We observed decreasing trends in ASIR and ASMR for cancers of the esophagus,stomach,and liver,whereas the ASIR increased significantly for cancers of the thyroid,prostate,and cervix.Conclusions:Cancer remains a major public health concern in China,with a cancer profile that reflects the coexistence of developed and developing regions.Sustained implementation of prevention and control measures has resulted in significant reductions in the incidence and mortality rates of certain historically high incidence cancers,such as esophageal,stomach and liver cancers.Adherence to the guidelines of the Healthy China Action Plan and the Cancer Prevention and Control Action Plan,along with continued efforts in comprehensive risk factor control,cancer screening,early diagnosis and treatment,and standardization of diagnostic and therapeutic protocols,are key strategies to effectively mitigate the increasing cancer burden by 2030.
基金supported by the National Key Research and Development Project,No.2019YFA0112100(to SF).
文摘Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even death.China has the largest population of patients with traumatic spinal cord injury.Previous studies of traumatic spinal cord injury in China have mostly been regional in scope;national-level studies have been rare.To the best of our knowledge,no national-level study of treatment status and economic burden has been performed.This retrospective study aimed to examine the epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China at the national level.We included 13,465 traumatic spinal cord injury patients who were injured between January 2013 and December 2018 and treated in 30 hospitals in 11 provinces/municipalities representing all geographical divisions of China.Patient epidemiological and clinical features,treatment status,and total and daily costs were recorded.Trends in the percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department and cost of care were assessed by annual percentage change using the Joinpoint Regression Program.The percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department did not significantly change overall(annual percentage change,-0.5%and 2.1%,respectively).A total of 10,053(74.7%)patients underwent surgery.Only 2.8%of patients who underwent surgery did so within 24 hours of injury.A total of 2005(14.9%)patients were treated with high-dose(≥500 mg)methylprednisolone sodium succinate/methylprednisolone(MPSS/MP);615(4.6%)received it within 8 hours.The total cost for acute traumatic spinal cord injury decreased over the study period(-4.7%),while daily cost did not significantly change(1.0%increase).Our findings indicate that public health initiatives should aim at improving hospitals’ability to complete early surgery within 24 hours,which is associated with improved sensorimotor recovery,increasing the awareness rate of clinical guidelines related to high-dose MPSS/MP to reduce the use of the treatment with insufficient evidence.
基金This paper was supported by the National Natural Science Foundation of China(NSFC)(71973138 and 72061137002)the Ministry of Science and Technology of China(2023YFE0105009).
文摘A more resilient livelihood is increasingly recognized as an efficient way to improve vulnerable households’food security and optimize their dietary decisions.This study quantifies rural household resilience in western China,identifies the three pillars(absorptive capacity,adaptive capacity,and transformative capacity)contribution to resilience,and then establishes the estimated Resilience Capacity Index(RCI)linked with food security and dietary diversity supported by the multiple indicator multiple cause(MIMIC)model.Results show that,despite geographical heterogeneity,the RCI consistently increased from 2015 to 2021.Households with a higher RCI inheriting better capacity to deal with risk and shocks are significantly and positively correlated with increasing food expenditure and diversifying food choices.It can be because resilient households will allocate more money to food expenditure instead of saving for livelihood uncertainty.Thus,policymakers can provide more incentives for rural households to adopt more dynamic and effective risk management strategies.This,in turn,could yield positive spillover effects by preventing human capital loss associated with dietary-related chronic diseases and mortality.
基金National Key Research and Development Program of China (2021YFC3000802)National Natural Science Foundation of China (41875059)The Open Research Program of the State Key Laboratory of Severe Weather (2021LASW-A04)。
文摘This study examines the spatio-temporal characteristics of heavy precipitation forecasts in eastern China from the European Centre for Medium-Range Weather Forecasts(ECMWF) using the time-domain version of the Method for Object-based Diagnostic Evaluation(MODE-TD). A total of 23 heavy rainfall cases occurring between 2018 and 2021 are selected for analysis. Using Typhoon “Rumbia” as a case study, the paper illustrates how the MODE-TD method assesses the overall simulation capability of models for the life history of precipitation systems. The results of multiple tests with different parameter configurations reveal that the model underestimates the number of objects’ forecasted precipitation tracks, particularly at smaller radii. Additionally, the analysis based on centroid offset and area ratio tests for different classified precipitation objects indicates that the model performs better in predicting large-area, fast-moving, and longlifespan precipitation objects. Conversely, it tends to have less accurate predictions for small-area, slow-moving, and shortlifespan precipitation objects. In terms of temporal characteristics, the model overestimates the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. In terms of temporal characteristics, the model tends to overestimate the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. Overall, the model provides more accurate predictions for the duration and dissipation of precipitation objects with large-area or long-lifespan(such as typhoon precipitation) while having large prediction errors for precipitation objects with small-area or short-lifespan. Furthermore, the model’s simulation results regarding the generation of precipitation objects show that it performs relatively well in simulating the generation of large-area and fast-moving precipitation objects. However, there are significant differences in the forecasted generation of small-area and slow-moving precipitation objects after 9 hours.
基金This study was supported in part by the National Natural Science Foundation of China(71973136 and 72061147002)the 2115 Talent Development Program of China Agricultural University.
文摘Over the past few decades,the Internet has rapidly diffused across China.The spread of the Internet has had a profound economic and social impact on Chinese rural areas.Existing research shows that Internet access significantly impacts agricultural production and improves smallholder farmers’income.Beyond these,the Internet can affect other dimensions of social welfare.However,research about the impact of Internet access on dietary quality in rural China remains scarce.This study utilizes multi-period panel data from Fixed Observation Point in rural China from 2009 to 2015 to estimate the impact of Internet access on dietary quality and food consumption of rural households and conducts a causal analysis.Regression models with time and household fixed effects allow robust estimation while reducing potential issues of unobserved heterogeneity.The estimates show that Internet access has significantly increased rural household dietary quality(measured by the Chinese Diet Balance Index).Further research finds that Internet access has increased the consumption of animal products,such as aquatic and dairy products.We also examine the underlying mechanisms.Internet access improves dietary quality and food consumption mainly through increasing household income and food expenditure.These results encourage the promotion of Internet access as a valuable tool for nutritional improvements,especially in rural areas.
文摘Boehmeria nivea var.strigosa Zeng Y.Wu&Y.Zhao,a new variety of B.nivea(Urticaceae)from Southwest China,is here described based on evidence from morphology and molecular phylogeny.This new variety is mainly characterized by its green abaxial leaf blade,partly connate stipules,and densely patent strigose hairs on stems and potioles.The phylogenetic analysis based on rbc L,nrDNA and rbc L+nrDNA datasets,revealed that all individuals of B.nivea var.strigosa formed a monophyletic group.The conservation status of B.nivea var.strigosa is assessed as“Near Threatened”(NT)according to IUCN evaluation criteria.The discovery of this new variety is not only crucial for the taxonomy of ramie,but also provides reference for the exploration and utilization of ramie.
基金supported by the National Key Research and Development Program of China(2022YFB3903503)the National Natural Science Foundation of China(U1901601)the Science and Technology Project of the Department of Education of Jiangxi Province,China(GJJ210541)。
文摘Various land use and land cover(LULC)products have been produced over the past decade with the development of remote sensing technology.Despite the differences in LULC classification schemes,there is a lack of research on assessing the accuracy of their application to croplands in a unified framework.Thus,this study evaluated the spatial and area accuracies of cropland classification for four commonly used global LULC products(i.e.,MCD12Q1V6,GlobCover2009,FROM-GLC and GlobeLand30)based on the harmonised FAO criterion,and quantified the relationships between four factors(i.e.,slope,elevation,field size and crop system)and cropland classification agreement.The validation results indicated that MCD12Q1 and GlobeLand30 performed well in cropland classification regarding spatial consistency,with overall accuracies of 94.90 and 93.52%,respectively.The FROMGLC showed the worst performance,with an overall accuracy of 83.17%.Overlaying the cropland generated by the four global LULC products,we found the proportions of complete agreement and disagreement were 15.51 and 44.72% for the cropland classification,respectively.High consistency was mainly observed in the Northeast China Plain,the Huang-Huai-Hai Plain and the northern part of the Middle-lower Yangtze Plain,China.In contrast,low consistency was detected primarily on the eastern edge of the northern and semiarid region,the Yunnan-Guizhou Plateau and southern China.Field size was the most important factor for mapping cropland.For area accuracy,compared with China Statistical Yearbook data at the provincial scale,the accuracies of different products in descending order were:GlobeLand30,FROM-GLC,MCD12Q1,and GlobCover2009.The cropland classification schemes mainly caused large area deviations among the four products,and they also resulted in the different ranks of spatial accuracy and area accuracy among the four products.Our results can provide valuable suggestions for selecting cropland products at the national or provincial scale and help cropland mapping and reconstruction,which is essential for food security and crop management,so they can also contribute to achieving the Sustainable Development Goals issued by the United Nations.