The thermal infrared channel (IRS4) of HJ-1B satellite obtains view zenith angles (VZA) up to ±33°. The view angle should be taken into account when retrieving land surface temperature (LST) from IRS4 data. ...The thermal infrared channel (IRS4) of HJ-1B satellite obtains view zenith angles (VZA) up to ±33°. The view angle should be taken into account when retrieving land surface temperature (LST) from IRS4 data. This study aims at improving the mono-window algorithm for retrieving LST from IRS4 data. Based on atmospheric radiative transfer simulations,a model for correcting the VZA effects on atmospheric transmittance is proposed. In addition,a generalized model for calculating the effective mean atmospheric temperature is developed. Validation with the simulated dataset based on standard atmospheric profiles reveals that the improved mono-window algorithm for IRS4 obtains high accuracy for LST retrieval,with the mean absolute error (MAE) and root mean square error (RMSE) being 1.0 K and 1.1 K,respectively. Numerical experiment with the radiosonde profile acquired in Beijing in winter demonstrates that the improved mono-window algorithm exhibits excellent ability for LST retrieval,with MAE and RMSE being 0.6 K and 0.6 K,respectively. Further application in Qinghai Lake and comparison with the Moderate-Resolution Imaging Spectroradiometer (MODIS) LST product suggest that the improved mono-window algorithm is applicable and feasible in actual conditions.展开更多
Gastric cancer is one of the leading causes of cancerrelated deaths worldwide, although the incidence has gradually decreased in many Western countries. Two main gastric cancer histotypes, intestinal and diffuse, are ...Gastric cancer is one of the leading causes of cancerrelated deaths worldwide, although the incidence has gradually decreased in many Western countries. Two main gastric cancer histotypes, intestinal and diffuse, are recognised. Although most of the described genetic alterations have been observed in both types, different genetic pathways have been hypothesized. Genetic and epigenetic events, including 1q loss of heterozygosity (LOH), microsatellite instability and hypermethylation, have mostly been reported in intestinal-type gastric carcinoma and its precursor lesions, whereas 17p LOH, mutation or loss of E-cadherin are more often implicated in the development of diffuse-type gastric cancer.In this review, we summarize the sometimes contradictory findings regarding those markers which influence the progression of gastric adenocarcinoma.展开更多
Developing the catastrophic medical insurance for urban and rural residents positively is the key action to keep the new round of reform for medical system into deep. However this insurance is the 'shortage' of the ...Developing the catastrophic medical insurance for urban and rural residents positively is the key action to keep the new round of reform for medical system into deep. However this insurance is the 'shortage' of the national health system, so the Shanghai government carries out The Trial Measures for Catastrophic Medical Insurance of urban and rural residents in 2014. In this thesis, we will describe the current situation of the catastrophic medical insurance in Shanghai from aspects of financing, level of compensation, the way to undertake and regulatory. What's more, we expect to explore the weakness of catastrophic medical insurance in actual motion, and offer proposals for progressively realizing the integration of urban and rural in medical insurance, improving the basic health care directory, enhancing cooperation with commercial medical insurance.展开更多
Since the reform and opening-up policy was implemented in China, the development of China' s medical and health undertakings has been very significant along with the rapid development of economy, and the people' s h...Since the reform and opening-up policy was implemented in China, the development of China' s medical and health undertakings has been very significant along with the rapid development of economy, and the people' s health level is steadily improved and the life expectancy is on the top list in the developing world. However, there are remarkable health differences among urban and rural areas, different regions, and small, medium-sized and large cities. In this paper, on the basis of the healthy social economic decision theory, the characteristics and causes of the regional difference between China' s residents in the health level are systematically analyzed, and then the strategies for the harmonious regional development of the Chinese population health are deeply discussed.展开更多
In the present study, the genetic diversity of one selected strain (Pujiang No. 1), two domesticated populations (GA and HX) and four wild populations (LZ, YN, SS and JL) of blunt snout bream (Megalobrama ambly...In the present study, the genetic diversity of one selected strain (Pujiang No. 1), two domesticated populations (GA and HX) and four wild populations (LZ, YN, SS and JL) of blunt snout bream (Megalobrama amblycephala) was analyzed using 17 microsatellite markers. The results showed that an average of 4.88-7.65 number of alleles (A); an average of 3.20-5.33 effective alleles (Ne); average observed beterozygosity (Ho) of 0.6985-0.9044; average expected beterozygosity (He) of 0.6501--0.7805; and the average polymorphism information content (PIC) at 0.5706-0.7226. Pairwise FST value between populations ranged from 0.0307-0.1451, and Nei's standard genetic distance between populations was 0.0938-0.4524. The expected heterozygosities in the domesticated populations (GA and HX) were significantly lower than those found in three wild populations (LZ, SS and JL), but no difference was detected when compared with the wild YN population. Likewise, no difference was found between the four wild populations or two domesticated populations. The expected heterozygosity in Pujiang No. 1 was higher than the two domesticated populations and lower than the four wild populations. Regarding pairwise Fsr value between populations, permutation test P-values were significant between the GA, HX and PJ populations, but not between the four wild populations. These results showed that the expected beterozygosity in the selected strain of blunt snout bream, after seven generations of selective breeding, was lower than that of wild populations, but this strain retains higher levels of genetic diversity than domesticated populations. The genetic differences and differentiation amongst wild populations, domesticated populations and the genetically improved strain of blunt snout bream will provide important conservation criteria and guide the utilization of germplasm resources.展开更多
Improving material biocompatibility has been a continu-ous effort and remains a major goal of dialysis therapy. In this respect, vitamin E-modified copolymers have been used to produce a generation of biomaterials tha...Improving material biocompatibility has been a continu-ous effort and remains a major goal of dialysis therapy. In this respect, vitamin E-modified copolymers have been used to produce a generation of biomaterials that has offered new clinical challenges and the chance of further improving the quality of synthetic hemodialyser membranes. This mini review article describes the evo-lution of these copolymers that only recently have been adopted to develop new vitamin E-modifed polysulfone hemodialysers. Biomaterial characteristics and clinical aspects of these membranes are discussed, starting from the most recent contributions that have appeared in the literature that are of interest for the community of nephrology and dialysis specialists, as well as bioma-terial scientists.展开更多
On January 12,2015,at the regular press briefing of National Health and Family Planning Commission(NHFPC),NHFPC reported the major tasks in health and family planning in China in 2015.The details are as follows:In-dep...On January 12,2015,at the regular press briefing of National Health and Family Planning Commission(NHFPC),NHFPC reported the major tasks in health and family planning in China in 2015.The details are as follows:In-depth Development of Medical and Health System Reform In-depth Development of Medical and Health System Reform.展开更多
Since reform and opening, China' s medical system reform has achieved remarkable success, but also brought a lot of problems, such as: hospitals are ill-defined in for-profit and nonprofit, the Office of the Ministr...Since reform and opening, China' s medical system reform has achieved remarkable success, but also brought a lot of problems, such as: hospitals are ill-defined in for-profit and nonprofit, the Office of the Ministry of Health hospitals and managed hospital are also ill- defined, solving our health care reform issue is urgent, the crux is the government and market positioning and how to build a service-oriented government, provide medical supplies, establish fair and equitable health care system which is the basic duty of government, are also urgent needs for building a socialist harmonious society.展开更多
To set up the nation's covering medical insurance syslem and to the realization of the basic medical insurance of urban and rural integration, is the inevitable trend in the development of China's medical insurance ...To set up the nation's covering medical insurance syslem and to the realization of the basic medical insurance of urban and rural integration, is the inevitable trend in the development of China's medical insurance reform, as well as it is also a key step. In recent years, the state promulgated a series of policies in promoting urban and rural medical insurance and many cities took the lead to reform form the medical insurance pattern with local characteristics. All of these are helpful for our country to realize the integration and providing valuable experience. The target of the article is to maintain the public cause of medical and health, to solve the problem of high cost of urban and rural residents to see a doctor. As well as to realize the objections of disease pro^ection, convenience, cure spends less.展开更多
To realize the automatic detection of solar radio burst(SRB)intensity,detection based on a modified multifactor support vector machine(SVM)algorithm is proposed.First,the influence of SRB on global navigation satellit...To realize the automatic detection of solar radio burst(SRB)intensity,detection based on a modified multifactor support vector machine(SVM)algorithm is proposed.First,the influence of SRB on global navigation satellite system(GNSS)signals is analyzed.Feature vectors,which can reflect the SRB intensity of stations,are also extracted.SRB intensity is classified according to the solar radio flux,and different class labels correspond to different SRB intensity types.The training samples are composed of feature vectors and their corresponding class labels.Second,training samples are input into SVM classifiers to one-against-one training to obtain the optimal classification models.Finally,the optimal classification model is synthesized into a modified multifactor SVM classifier,which is used to automatically detect the SRB intensity of new data.Experimental results indicate that for historical SRB events,the average accuracy of SRB intensity detection is greater than 90%when the solar incident angle is higher than 20°.Compared with other methods,the proposed method considers many factors with higher accuracy and does not rely on radio telescopes,thereby saving cost.展开更多
Irrational use of medicines is a major problem worldwide, and it is believed there would be positive correlation between the National Essential Medicines Policies(NEMPs) and the level of rational use of medicines(RUMs...Irrational use of medicines is a major problem worldwide, and it is believed there would be positive correlation between the National Essential Medicines Policies(NEMPs) and the level of rational use of medicines(RUMs). Though there is some early evidence on the NEMPs’ effects on RUMs in China, the evidence is scarce, and conclusions vary. In the present study, we aimed to evaluate the impacts of the NEMPs of China on the RUMs in the primary health care institutions(PHCs). A cross-sectional survey was conducted in 2010. A total of 201 PHCs from six provinces of China were selected, and 39 181 prescriptions were extracted from January to June, 2010. Six indicators were used and tested by independent-samples T test. We found that the average number of drugs per prescription in PHCs with NEMP implementation(the treatment group) was significantly higher than that of the group without NEMP implementation(the control group)(3.37 vs. 2.83, P<0.01). There was no significant difference in the average cost per prescription(81.43 vs. 75.02). The percentage of prescriptions, including an antibiotic(53.40% vs. 36.48%, P<0.01) or an injection(40.54% vs. 27.94%, P<0.01), was higher in the treatment group, and the percentage of drugs prescribed by general name was significantly lower(83.71% vs. 93.11%, P<0.01). For the percentage of drugs prescribed from essential medicines list, the treatment group exhibited the higher ratio(76.12% vs. 53.45%, P<0.01). From this study, the NEMPs were not likely to have a positive impact on RUMs. China still needed efforts to improve the selection, the absence of physicians’ active involvement, and the patients’ habits of irrational medication use.展开更多
The regional satellite navigation system of COMPASS (Phase I) provides both open services and authorized services. Authorized services offer differential corrections and integrity information to users to support highe...The regional satellite navigation system of COMPASS (Phase I) provides both open services and authorized services. Authorized services offer differential corrections and integrity information to users to support higher positioning, navigation and timing precision. Experimenting with real data, positioning accuracy is estimated with a 3GEO/4IGSO COMPASS constellation. The results show that with dual-frequency and single-frequency pseudo-range measurements, the positioning errors are respectively 8 and 10 m (RMS) for open service users, while for authorized users, the errors are 4 and 5 m (RMS), respectively. The COMPASS constellation geometry may cause large error to occur in the height component by 7-9 m for dualor single-frequency users, which can be effectively reduced with the differential corrections supplied by the authorized services. Multipath errors are identified and corrected for COMPASS, resulting in 25% positioning accuracy improvement for dual-frequency users and 10% improvement for single-frequency users.展开更多
Health policies have played significant roles in attaining good achievements in population health improvement. This paper chronologically reviews and analyzes health-rehted parliamentary actions and law enactments in ...Health policies have played significant roles in attaining good achievements in population health improvement. This paper chronologically reviews and analyzes health-rehted parliamentary actions and law enactments in Canada. It indicates that the salient feature of the Canadian health system is that it is pubhcly financed with a single-payer, but privately run. The Canadian health system is based upon five founding principles: care must be universal (covering everyone), portable ( among all provinces), comprehensive ( covering all medically necessary services ), accessible (without barriers to access hke user fees ), and pubhdy administered( by the government). This paper pays special attention to what and how China can learn from Canada and what should be avoided against failures of Canadian health system, and how it might provide a new health policy base for China's current health reform.展开更多
基金Under the auspices of Opening Funding of State Key Laboratory for Remote Sensing ScienceNational High-tech Research and Development Program (863 Program) (No. 2007AA120205, 2007AA120306)
文摘The thermal infrared channel (IRS4) of HJ-1B satellite obtains view zenith angles (VZA) up to ±33°. The view angle should be taken into account when retrieving land surface temperature (LST) from IRS4 data. This study aims at improving the mono-window algorithm for retrieving LST from IRS4 data. Based on atmospheric radiative transfer simulations,a model for correcting the VZA effects on atmospheric transmittance is proposed. In addition,a generalized model for calculating the effective mean atmospheric temperature is developed. Validation with the simulated dataset based on standard atmospheric profiles reveals that the improved mono-window algorithm for IRS4 obtains high accuracy for LST retrieval,with the mean absolute error (MAE) and root mean square error (RMSE) being 1.0 K and 1.1 K,respectively. Numerical experiment with the radiosonde profile acquired in Beijing in winter demonstrates that the improved mono-window algorithm exhibits excellent ability for LST retrieval,with MAE and RMSE being 0.6 K and 0.6 K,respectively. Further application in Qinghai Lake and comparison with the Moderate-Resolution Imaging Spectroradiometer (MODIS) LST product suggest that the improved mono-window algorithm is applicable and feasible in actual conditions.
文摘Gastric cancer is one of the leading causes of cancerrelated deaths worldwide, although the incidence has gradually decreased in many Western countries. Two main gastric cancer histotypes, intestinal and diffuse, are recognised. Although most of the described genetic alterations have been observed in both types, different genetic pathways have been hypothesized. Genetic and epigenetic events, including 1q loss of heterozygosity (LOH), microsatellite instability and hypermethylation, have mostly been reported in intestinal-type gastric carcinoma and its precursor lesions, whereas 17p LOH, mutation or loss of E-cadherin are more often implicated in the development of diffuse-type gastric cancer.In this review, we summarize the sometimes contradictory findings regarding those markers which influence the progression of gastric adenocarcinoma.
文摘Developing the catastrophic medical insurance for urban and rural residents positively is the key action to keep the new round of reform for medical system into deep. However this insurance is the 'shortage' of the national health system, so the Shanghai government carries out The Trial Measures for Catastrophic Medical Insurance of urban and rural residents in 2014. In this thesis, we will describe the current situation of the catastrophic medical insurance in Shanghai from aspects of financing, level of compensation, the way to undertake and regulatory. What's more, we expect to explore the weakness of catastrophic medical insurance in actual motion, and offer proposals for progressively realizing the integration of urban and rural in medical insurance, improving the basic health care directory, enhancing cooperation with commercial medical insurance.
文摘Since the reform and opening-up policy was implemented in China, the development of China' s medical and health undertakings has been very significant along with the rapid development of economy, and the people' s health level is steadily improved and the life expectancy is on the top list in the developing world. However, there are remarkable health differences among urban and rural areas, different regions, and small, medium-sized and large cities. In this paper, on the basis of the healthy social economic decision theory, the characteristics and causes of the regional difference between China' s residents in the health level are systematically analyzed, and then the strategies for the harmonious regional development of the Chinese population health are deeply discussed.
基金supported by the National Natural Science Foundation of China(30630051)Doctoral Research Initial Funding from Shanghai Ocean University(A-2400-11-0186)
文摘In the present study, the genetic diversity of one selected strain (Pujiang No. 1), two domesticated populations (GA and HX) and four wild populations (LZ, YN, SS and JL) of blunt snout bream (Megalobrama amblycephala) was analyzed using 17 microsatellite markers. The results showed that an average of 4.88-7.65 number of alleles (A); an average of 3.20-5.33 effective alleles (Ne); average observed beterozygosity (Ho) of 0.6985-0.9044; average expected beterozygosity (He) of 0.6501--0.7805; and the average polymorphism information content (PIC) at 0.5706-0.7226. Pairwise FST value between populations ranged from 0.0307-0.1451, and Nei's standard genetic distance between populations was 0.0938-0.4524. The expected heterozygosities in the domesticated populations (GA and HX) were significantly lower than those found in three wild populations (LZ, SS and JL), but no difference was detected when compared with the wild YN population. Likewise, no difference was found between the four wild populations or two domesticated populations. The expected heterozygosity in Pujiang No. 1 was higher than the two domesticated populations and lower than the four wild populations. Regarding pairwise Fsr value between populations, permutation test P-values were significant between the GA, HX and PJ populations, but not between the four wild populations. These results showed that the expected beterozygosity in the selected strain of blunt snout bream, after seven generations of selective breeding, was lower than that of wild populations, but this strain retains higher levels of genetic diversity than domesticated populations. The genetic differences and differentiation amongst wild populations, domesticated populations and the genetically improved strain of blunt snout bream will provide important conservation criteria and guide the utilization of germplasm resources.
文摘Improving material biocompatibility has been a continu-ous effort and remains a major goal of dialysis therapy. In this respect, vitamin E-modified copolymers have been used to produce a generation of biomaterials that has offered new clinical challenges and the chance of further improving the quality of synthetic hemodialyser membranes. This mini review article describes the evo-lution of these copolymers that only recently have been adopted to develop new vitamin E-modifed polysulfone hemodialysers. Biomaterial characteristics and clinical aspects of these membranes are discussed, starting from the most recent contributions that have appeared in the literature that are of interest for the community of nephrology and dialysis specialists, as well as bioma-terial scientists.
文摘On January 12,2015,at the regular press briefing of National Health and Family Planning Commission(NHFPC),NHFPC reported the major tasks in health and family planning in China in 2015.The details are as follows:In-depth Development of Medical and Health System Reform In-depth Development of Medical and Health System Reform.
文摘Since reform and opening, China' s medical system reform has achieved remarkable success, but also brought a lot of problems, such as: hospitals are ill-defined in for-profit and nonprofit, the Office of the Ministry of Health hospitals and managed hospital are also ill- defined, solving our health care reform issue is urgent, the crux is the government and market positioning and how to build a service-oriented government, provide medical supplies, establish fair and equitable health care system which is the basic duty of government, are also urgent needs for building a socialist harmonious society.
文摘To set up the nation's covering medical insurance syslem and to the realization of the basic medical insurance of urban and rural integration, is the inevitable trend in the development of China's medical insurance reform, as well as it is also a key step. In recent years, the state promulgated a series of policies in promoting urban and rural medical insurance and many cities took the lead to reform form the medical insurance pattern with local characteristics. All of these are helpful for our country to realize the integration and providing valuable experience. The target of the article is to maintain the public cause of medical and health, to solve the problem of high cost of urban and rural residents to see a doctor. As well as to realize the objections of disease pro^ection, convenience, cure spends less.
基金The National Key Research and Development Plan of China(No.2018YFB0505103)the National Natural Science Foundation of China(No.61873064)。
文摘To realize the automatic detection of solar radio burst(SRB)intensity,detection based on a modified multifactor support vector machine(SVM)algorithm is proposed.First,the influence of SRB on global navigation satellite system(GNSS)signals is analyzed.Feature vectors,which can reflect the SRB intensity of stations,are also extracted.SRB intensity is classified according to the solar radio flux,and different class labels correspond to different SRB intensity types.The training samples are composed of feature vectors and their corresponding class labels.Second,training samples are input into SVM classifiers to one-against-one training to obtain the optimal classification models.Finally,the optimal classification model is synthesized into a modified multifactor SVM classifier,which is used to automatically detect the SRB intensity of new data.Experimental results indicate that for historical SRB events,the average accuracy of SRB intensity detection is greater than 90%when the solar incident angle is higher than 20°.Compared with other methods,the proposed method considers many factors with higher accuracy and does not rely on radio telescopes,thereby saving cost.
基金National Natural Science Foundation of China(Grant No.71303011,71774005)
文摘Irrational use of medicines is a major problem worldwide, and it is believed there would be positive correlation between the National Essential Medicines Policies(NEMPs) and the level of rational use of medicines(RUMs). Though there is some early evidence on the NEMPs’ effects on RUMs in China, the evidence is scarce, and conclusions vary. In the present study, we aimed to evaluate the impacts of the NEMPs of China on the RUMs in the primary health care institutions(PHCs). A cross-sectional survey was conducted in 2010. A total of 201 PHCs from six provinces of China were selected, and 39 181 prescriptions were extracted from January to June, 2010. Six indicators were used and tested by independent-samples T test. We found that the average number of drugs per prescription in PHCs with NEMP implementation(the treatment group) was significantly higher than that of the group without NEMP implementation(the control group)(3.37 vs. 2.83, P<0.01). There was no significant difference in the average cost per prescription(81.43 vs. 75.02). The percentage of prescriptions, including an antibiotic(53.40% vs. 36.48%, P<0.01) or an injection(40.54% vs. 27.94%, P<0.01), was higher in the treatment group, and the percentage of drugs prescribed by general name was significantly lower(83.71% vs. 93.11%, P<0.01). For the percentage of drugs prescribed from essential medicines list, the treatment group exhibited the higher ratio(76.12% vs. 53.45%, P<0.01). From this study, the NEMPs were not likely to have a positive impact on RUMs. China still needed efforts to improve the selection, the absence of physicians’ active involvement, and the patients’ habits of irrational medication use.
基金supported by the National Natural Science Foundation of China (Grant Nos. 11103064 and 11173049)the Shanghai Committee of Science and Technology, China (Grant No. 11ZR1443500)
文摘The regional satellite navigation system of COMPASS (Phase I) provides both open services and authorized services. Authorized services offer differential corrections and integrity information to users to support higher positioning, navigation and timing precision. Experimenting with real data, positioning accuracy is estimated with a 3GEO/4IGSO COMPASS constellation. The results show that with dual-frequency and single-frequency pseudo-range measurements, the positioning errors are respectively 8 and 10 m (RMS) for open service users, while for authorized users, the errors are 4 and 5 m (RMS), respectively. The COMPASS constellation geometry may cause large error to occur in the height component by 7-9 m for dualor single-frequency users, which can be effectively reduced with the differential corrections supplied by the authorized services. Multipath errors are identified and corrected for COMPASS, resulting in 25% positioning accuracy improvement for dual-frequency users and 10% improvement for single-frequency users.
文摘Health policies have played significant roles in attaining good achievements in population health improvement. This paper chronologically reviews and analyzes health-rehted parliamentary actions and law enactments in Canada. It indicates that the salient feature of the Canadian health system is that it is pubhcly financed with a single-payer, but privately run. The Canadian health system is based upon five founding principles: care must be universal (covering everyone), portable ( among all provinces), comprehensive ( covering all medically necessary services ), accessible (without barriers to access hke user fees ), and pubhdy administered( by the government). This paper pays special attention to what and how China can learn from Canada and what should be avoided against failures of Canadian health system, and how it might provide a new health policy base for China's current health reform.