Field experiments were carried out in northern Zhejiang Province. Three insecticides (methamidophos,Shachongshuang and triazophos) were used to control the rice leaffolder Cnaphalocrocis medinalis and rice striped ste...Field experiments were carried out in northern Zhejiang Province. Three insecticides (methamidophos,Shachongshuang and triazophos) were used to control the rice leaffolder Cnaphalocrocis medinalis and rice striped stemborer Chilo suppressalis in rice fields during 18—27 days after transplantating. The impacts of timing and insecticides on the population development of brown planthopper Nilaparavata lugens was surveyed by direct counting on the plants or by tapping method.展开更多
China’s population increased from 540 million in 1949 to 1.4 billion in 2018.Demo-graphic transition provides a theoretical framework to understand China’s popula-tion changes,and we can divide the history of China...China’s population increased from 540 million in 1949 to 1.4 billion in 2018.Demo-graphic transition provides a theoretical framework to understand China’s popula-tion changes,and we can divide the history of China’s population development into three periods:the period of mortality decline-driven demographic transition(prior to 1970),the period of fertility decline-driven demographic transition(1970-1999),and post-demographic transition period(after 2000).This paper provides a histori-cal overview of China’s population development,and concludes by identifying the main characteristics of this development and the main lessons learned from the pro-cess of population development.展开更多
MY ancestors have lived in Lhasa, Tibet, for generations. I have personally witnessed the great changes in modern Tibetan society. The total population of the region has doubled since 1951. The Fourth National Census ...MY ancestors have lived in Lhasa, Tibet, for generations. I have personally witnessed the great changes in modern Tibetan society. The total population of the region has doubled since 1951. The Fourth National Census in 1990 revealed that the human fertility rate in the Tibet Autonomous Region was 27.60 per thousand, the natural population growth rate 18.40 per thousand, and the total fertility rate of women at childbearing age 4.22.展开更多
BACKGROUND Acute kidney injury(AKI)after coronary artery bypass graft(CABG)surgery is associated with significant morbidity and mortality.This retrospective study aimed to establish a risk score for postoperative AKI ...BACKGROUND Acute kidney injury(AKI)after coronary artery bypass graft(CABG)surgery is associated with significant morbidity and mortality.This retrospective study aimed to establish a risk score for postoperative AKI in a Chinese population.METHODS A total of 1138 patients undergoing CABG were collected from September 2018 to May 2020 and divided into a derivation and validation cohort.AKI was defined according to the Kidney Disease Improving Global Outcomes(KDIGO)criteria.Multivariable logistic regression analysis was used to determine the independent predictors of AKI,and the predictive ability of the model was determined using a receiver operating characteristic(ROC)curve.RESULTS The incidence of cardiac surgery–associated acute kidney injury(CSA-AKI)was 24.17%,and 0.53%of AKI patients required dialysis(AKI-D).Among the derivation cohort,multivariable logistic regression showed that age≥70 years,body mass index(BMI)≥25 kg/m2,estimated glomerular filtration rate(eGFR)≤60 mL/min per 1.73 m2,ejection fraction(EF)≤45%,use of statins,red blood cell transfusion,use of adrenaline,intra-aortic balloon pump(IABP)implantation,postoperative low cardiac output syndrome(LCOS)and reoperation for bleeding were independent predictors.The predictive model was scored from 0 to32 points with three risk categories.The AKI frequencies were as follows:0-8 points(15.9%),9-17 points(36.5%)and≥18 points(90.4%).The area under of the ROC curve was 0.730(95%CI:0.691-0.768)in the derivation cohort.The predictive index had good discrimination in the validation cohort,with an area under the curve of 0.735(95%CI:0.655-0.815).The model was well calibrated according to the Hosmer-Lemeshow test(P=0.372).CONCLUSION The performance of the prediction model was valid and accurate in predicting KDIGO-AKI after CABG surgery in Chinese patients,and could improve the early prognosis and clinical interventions.展开更多
Recombinant inbred lines(RILs) serve as powerful tools for genetic mapping.RILs are obtained by crossing two inbred lines followed by repeated selfing or sib-mating to create a set of new
the Interntaional Workshop on China's Agenda 21 held in October 1993, Professor Zeng Yi proposed three issues important to the field of population and sustainable development: 1) Promote basic education for childr...the Interntaional Workshop on China's Agenda 21 held in October 1993, Professor Zeng Yi proposed three issues important to the field of population and sustainable development: 1) Promote basic education for children and impede the newly emerging trend of dropping out from school, 2) Improve the social, economic and family status of women and change the traditional 'son-preference' ideology, and 3) Improve the social security system for the elderly to counter the negative effects of accelerating aging of the population.展开更多
This article analyses the causes for the decline in the fertility rate of China's population The author attributes the tremendous decline to the following leading causes: the profound understanding and high politi...This article analyses the causes for the decline in the fertility rate of China's population The author attributes the tremendous decline to the following leading causes: the profound understanding and high political commitment of top Chinese leaders, integration of population with development, the extensive IEC programme and effective technical service, on top of others. The author tells how population and development are integrated in practice in the past decades and the overall effectiveness of the integration approach.展开更多
Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of th...Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of the population in this region. The analyses show that since the 3nl population census, total population, average age and total birth rate have all changed considerably: ① Total population has grown, fast, with most counties' annual average growth rate of more than 10. ② In terms of the region's average age, in 2000 the age in the 18 counties is younger than 30 years old. ③ Compared with the 3nl population census, labor force by the 5th census is much younger. ④ Countermeasures are proposed to control population by controlling birth rate as the result of the local resident's quality improvement by education.展开更多
This study's primary purpose was to explore the role of tourism development in enhancing well-being in a highly populated developing economy by focusing on the case study of Pakistan Several econometric techniques...This study's primary purpose was to explore the role of tourism development in enhancing well-being in a highly populated developing economy by focusing on the case study of Pakistan Several econometric techniques and approaches were used on annual time series data covering the 1990-2016 period to investigate the causal relationship of well-being with tourism development,political stability,economics,and population growth.The findings suggested that tourism development enhances economic growth and well-being,hence providing support for the tourism-led growth hypothesis However,population growth and political instability exhibited a negative relationship with well-being;in addition,the level of political stability determined tourism activities.Hence,this study is unique due to its specific focus on the role of political stability and tourism development in the enhancement of wellbeing in a highly populated developing economy Moreover,the practical implications of the study have been provided in light of the main findings.展开更多
The impact of South-South cooperation(SSC)has been bolstered in the context of implementing the International Conference on Population and Development(ICPD)Programme of Action.In the past 25 years since ICPD in 1994,r...The impact of South-South cooperation(SSC)has been bolstered in the context of implementing the International Conference on Population and Development(ICPD)Programme of Action.In the past 25 years since ICPD in 1994,remarkable progress and achievements have been made in promoting SSC in population and develop-ment.China has been committed to working with developing countries,UN agen-cies and international organizations to advance ICPD under the framework of SSC.As the landscape of international development assistance has been changing and the ICPD remains as an unfinished agenda,the SSC has increasingly recognized the importance of effective financial inclusion policy in the implementation of the ICPD and the 2030 Agenda for Sustainable Development.The international community has recently identified seven strategic priority areas for SSC in the next few years,i.e.,(1)population dynamics and development;(2)universal access to reproduc-tive health and family planning services;(3)women’s,children’s and adolescents’health;(4)healthy ageing;(5)migration;(6)health and poverty alleviation;and(7)ending sexual and gender-based violence.The institutionalization and operation-alization remain as critical challenges,and special attention needs to be given to address these issues.Stronger political commitments,enhanced capacity building,better coordination and partnerships establishment of the SSC Center of Excellence,adequate resource mobilization and more evidence-based researches and systematic evaluation are recommended as future strategies for further promoting the SSC in population and development.展开更多
This paper gives an interpretation of the quasispecies concept for an experiment of growing the Lymantria dispar artificial population.The changes estimate in the population parameters for a significant change in envi...This paper gives an interpretation of the quasispecies concept for an experiment of growing the Lymantria dispar artificial population.The changes estimate in the population parameters for a significant change in environmental conditions at the stage of hatching caterpillars from the eggs was given.Three numerical and two random parameters were used for quantitative analysis.They characterize the development of individuals of the population at this stage.The parameter changes significance was verified with using statistical tests.The results obtained do not contradict the quasispecies model.The use of fuzzy sets describes the transition from one quasispecies to another at a significant change in environmental conditions.展开更多
A new Vary in Distance Leslie Matrix is adopted to process the observed data of a giant panda population’s development trend dynamics with unequal distance age groups. Results show that this new method adopted is mu...A new Vary in Distance Leslie Matrix is adopted to process the observed data of a giant panda population’s development trend dynamics with unequal distance age groups. Results show that this new method adopted is much simpler than the usual lesile Matrix analysis, and no need of deviding the pandas into equal distance age groups and no so many asumptions are needed as in the usual Leslie Methods. We only changed the meaning of some elements in Leslie Matrix and processed the developmental trend of panda population in Wolong Wu Yi Peng successfully we also carried out a sensitivity analysis of many parameters as well as the computer simulation.展开更多
文摘Field experiments were carried out in northern Zhejiang Province. Three insecticides (methamidophos,Shachongshuang and triazophos) were used to control the rice leaffolder Cnaphalocrocis medinalis and rice striped stemborer Chilo suppressalis in rice fields during 18—27 days after transplantating. The impacts of timing and insecticides on the population development of brown planthopper Nilaparavata lugens was surveyed by direct counting on the plants or by tapping method.
基金This work was supported in part by the Shanghai Municipal Education Commission Research and Innovation Project(E00026).
文摘China’s population increased from 540 million in 1949 to 1.4 billion in 2018.Demo-graphic transition provides a theoretical framework to understand China’s popula-tion changes,and we can divide the history of China’s population development into three periods:the period of mortality decline-driven demographic transition(prior to 1970),the period of fertility decline-driven demographic transition(1970-1999),and post-demographic transition period(after 2000).This paper provides a histori-cal overview of China’s population development,and concludes by identifying the main characteristics of this development and the main lessons learned from the pro-cess of population development.
文摘MY ancestors have lived in Lhasa, Tibet, for generations. I have personally witnessed the great changes in modern Tibetan society. The total population of the region has doubled since 1951. The Fourth National Census in 1990 revealed that the human fertility rate in the Tibet Autonomous Region was 27.60 per thousand, the natural population growth rate 18.40 per thousand, and the total fertility rate of women at childbearing age 4.22.
基金supported by National Natural S cience Foundation of China(81570373)。
文摘BACKGROUND Acute kidney injury(AKI)after coronary artery bypass graft(CABG)surgery is associated with significant morbidity and mortality.This retrospective study aimed to establish a risk score for postoperative AKI in a Chinese population.METHODS A total of 1138 patients undergoing CABG were collected from September 2018 to May 2020 and divided into a derivation and validation cohort.AKI was defined according to the Kidney Disease Improving Global Outcomes(KDIGO)criteria.Multivariable logistic regression analysis was used to determine the independent predictors of AKI,and the predictive ability of the model was determined using a receiver operating characteristic(ROC)curve.RESULTS The incidence of cardiac surgery–associated acute kidney injury(CSA-AKI)was 24.17%,and 0.53%of AKI patients required dialysis(AKI-D).Among the derivation cohort,multivariable logistic regression showed that age≥70 years,body mass index(BMI)≥25 kg/m2,estimated glomerular filtration rate(eGFR)≤60 mL/min per 1.73 m2,ejection fraction(EF)≤45%,use of statins,red blood cell transfusion,use of adrenaline,intra-aortic balloon pump(IABP)implantation,postoperative low cardiac output syndrome(LCOS)and reoperation for bleeding were independent predictors.The predictive model was scored from 0 to32 points with three risk categories.The AKI frequencies were as follows:0-8 points(15.9%),9-17 points(36.5%)and≥18 points(90.4%).The area under of the ROC curve was 0.730(95%CI:0.691-0.768)in the derivation cohort.The predictive index had good discrimination in the validation cohort,with an area under the curve of 0.735(95%CI:0.655-0.815).The model was well calibrated according to the Hosmer-Lemeshow test(P=0.372).CONCLUSION The performance of the prediction model was valid and accurate in predicting KDIGO-AKI after CABG surgery in Chinese patients,and could improve the early prognosis and clinical interventions.
文摘Recombinant inbred lines(RILs) serve as powerful tools for genetic mapping.RILs are obtained by crossing two inbred lines followed by repeated selfing or sib-mating to create a set of new
文摘the Interntaional Workshop on China's Agenda 21 held in October 1993, Professor Zeng Yi proposed three issues important to the field of population and sustainable development: 1) Promote basic education for children and impede the newly emerging trend of dropping out from school, 2) Improve the social, economic and family status of women and change the traditional 'son-preference' ideology, and 3) Improve the social security system for the elderly to counter the negative effects of accelerating aging of the population.
文摘This article analyses the causes for the decline in the fertility rate of China's population The author attributes the tremendous decline to the following leading causes: the profound understanding and high political commitment of top Chinese leaders, integration of population with development, the extensive IEC programme and effective technical service, on top of others. The author tells how population and development are integrated in practice in the past decades and the overall effectiveness of the integration approach.
文摘Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of the population in this region. The analyses show that since the 3nl population census, total population, average age and total birth rate have all changed considerably: ① Total population has grown, fast, with most counties' annual average growth rate of more than 10. ② In terms of the region's average age, in 2000 the age in the 18 counties is younger than 30 years old. ③ Compared with the 3nl population census, labor force by the 5th census is much younger. ④ Countermeasures are proposed to control population by controlling birth rate as the result of the local resident's quality improvement by education.
文摘This study's primary purpose was to explore the role of tourism development in enhancing well-being in a highly populated developing economy by focusing on the case study of Pakistan Several econometric techniques and approaches were used on annual time series data covering the 1990-2016 period to investigate the causal relationship of well-being with tourism development,political stability,economics,and population growth.The findings suggested that tourism development enhances economic growth and well-being,hence providing support for the tourism-led growth hypothesis However,population growth and political instability exhibited a negative relationship with well-being;in addition,the level of political stability determined tourism activities.Hence,this study is unique due to its specific focus on the role of political stability and tourism development in the enhancement of wellbeing in a highly populated developing economy Moreover,the practical implications of the study have been provided in light of the main findings.
文摘The impact of South-South cooperation(SSC)has been bolstered in the context of implementing the International Conference on Population and Development(ICPD)Programme of Action.In the past 25 years since ICPD in 1994,remarkable progress and achievements have been made in promoting SSC in population and develop-ment.China has been committed to working with developing countries,UN agen-cies and international organizations to advance ICPD under the framework of SSC.As the landscape of international development assistance has been changing and the ICPD remains as an unfinished agenda,the SSC has increasingly recognized the importance of effective financial inclusion policy in the implementation of the ICPD and the 2030 Agenda for Sustainable Development.The international community has recently identified seven strategic priority areas for SSC in the next few years,i.e.,(1)population dynamics and development;(2)universal access to reproduc-tive health and family planning services;(3)women’s,children’s and adolescents’health;(4)healthy ageing;(5)migration;(6)health and poverty alleviation;and(7)ending sexual and gender-based violence.The institutionalization and operation-alization remain as critical challenges,and special attention needs to be given to address these issues.Stronger political commitments,enhanced capacity building,better coordination and partnerships establishment of the SSC Center of Excellence,adequate resource mobilization and more evidence-based researches and systematic evaluation are recommended as future strategies for further promoting the SSC in population and development.
文摘This paper gives an interpretation of the quasispecies concept for an experiment of growing the Lymantria dispar artificial population.The changes estimate in the population parameters for a significant change in environmental conditions at the stage of hatching caterpillars from the eggs was given.Three numerical and two random parameters were used for quantitative analysis.They characterize the development of individuals of the population at this stage.The parameter changes significance was verified with using statistical tests.The results obtained do not contradict the quasispecies model.The use of fuzzy sets describes the transition from one quasispecies to another at a significant change in environmental conditions.
文摘A new Vary in Distance Leslie Matrix is adopted to process the observed data of a giant panda population’s development trend dynamics with unequal distance age groups. Results show that this new method adopted is much simpler than the usual lesile Matrix analysis, and no need of deviding the pandas into equal distance age groups and no so many asumptions are needed as in the usual Leslie Methods. We only changed the meaning of some elements in Leslie Matrix and processed the developmental trend of panda population in Wolong Wu Yi Peng successfully we also carried out a sensitivity analysis of many parameters as well as the computer simulation.
