Traditional occupational disease control and prevention has remained prevalent in China over recent decades. There are appropriately 30,000 new case reports of occupational diseases annually. Although China has alread...Traditional occupational disease control and prevention has remained prevalent in China over recent decades. There are appropriately 30,000 new case reports of occupational diseases annually. Although China has already established a series of occupational disease prevention programs, occupational health risk assessment （OHRA） strategies continue to be a limitation.展开更多
Objective This study was designed to conduct a retrospective and systematic occupational health risk assessment(OHRA)of enterprises that used benzene,toluene,and xylene(BTX)in Shanghai,China.Methods All data for the s...Objective This study was designed to conduct a retrospective and systematic occupational health risk assessment(OHRA)of enterprises that used benzene,toluene,and xylene(BTX)in Shanghai,China.Methods All data for the study were obtained from 1,705 occupational health examination and evaluation reports from 2013 to 2017,and a semiquantitative model following Chinese OHRA guidelines(GBZ/T 298-2017)was applied for the assessment.Results The selected enterprises using BTX were mainly involved in manufacturing of products.Using the exposure level method,health risk levels associated with exposure to BTX were classified as medium,negligible,or low.However,the risk levels associated with benzene and toluene were significantly different according to job types,with gluers and inkers exhibiting greater health risks.For the same job type,the health risk levels assessed using the comprehensive index method were higher than those using the exposure level method.Conclusion Our OHRA reveals that workers who are exposed to BTX still face excessive health risk.Additionally,the risk level varied depending on job categories and exposure to specific chemicals.Therefore,additional control measures recommended by OHRA guidelines are essential to reduce worker exposure levels.展开更多
Our purpose of this paper is to apply the improved Kudryashov method for solving various types of nonlinear fractional partial differential equations. As an application, the time-space fractional Korteweg-de Vries-Bur...Our purpose of this paper is to apply the improved Kudryashov method for solving various types of nonlinear fractional partial differential equations. As an application, the time-space fractional Korteweg-de Vries-Burger (KdV-Burger) equation is solved using this method and we get some new travelling wave solutions. To acquire our purpose a complex transformation has been also used to reduce nonlinear fractional partial differential equations to nonlinear ordinary differential equations of integer order, in the sense of the Jumarie’s modified Riemann-Liouville derivative. Afterwards, the improved Kudryashov method is implemented and we get our required reliable solutions where the results are justified by mathematical software Maple-13.展开更多
目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为...目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为研究对象,共181名。将2016级84名学生分为线上组,接受《职业卫生与职业医学》的线上教学;2017级97名学生分为线下组,接受该课程的线下教学。将所有学生考试成绩录入试卷分析系统,在试卷质量分析基础上比较2组学生的考试成绩。结果2组学生期末考试试卷质量基本处于同等水平,试题分布及难易度较合理,差异无统计学意义(P>0.05),具有可比性,且2组学生成绩分布均呈现正态分布。进一步统计结果表明,线上组学生期末考试成绩高于线下组,差异有统计学意义(P<0.05)。线上组及格率高于线下组,差异有统计学意义(P<0.05)。结论在新医科背景下,基于中国大学MOOC在线平台的线上教学模式能明显提高《职业卫生与职业医学》课程的教学效果,这为新时代深入开展该课程的线上教学改革提供参考和思路。展开更多
Through the analysis of the overall landscape,revetments and roads and plant landscape,10 evaluation factors were determined.The comprehensive evaluation model for the campus space of Anhui Xinhua University was const...Through the analysis of the overall landscape,revetments and roads and plant landscape,10 evaluation factors were determined.The comprehensive evaluation model for the campus space of Anhui Xinhua University was constructed by analytic hierarchy process(AHP).The results showed that revetment safety,road convenience,plant disease resistance and campus activity space were important factors affecting the spatial form planning of campus.Through the comparative analysis of the collected data,optimization suggestions were put forward to provide a basis for the establishment of“people-oriented”campus open space system.展开更多
基金supported by the Natural Science Foundation of China(81472961)the Joint Projects of the National Health and Family Planning Commission of China and the Health Bureau of Zhejiang Province(No.WSK 2014-2-004)the Zhejiang Provincial Program for the Cultivation of High-Level Innovative Health Talents
文摘Traditional occupational disease control and prevention has remained prevalent in China over recent decades. There are appropriately 30,000 new case reports of occupational diseases annually. Although China has already established a series of occupational disease prevention programs, occupational health risk assessment （OHRA） strategies continue to be a limitation.
基金supported by research grants from the National Natural Science Foundation of China[No.81474929]。
文摘Objective This study was designed to conduct a retrospective and systematic occupational health risk assessment(OHRA)of enterprises that used benzene,toluene,and xylene(BTX)in Shanghai,China.Methods All data for the study were obtained from 1,705 occupational health examination and evaluation reports from 2013 to 2017,and a semiquantitative model following Chinese OHRA guidelines(GBZ/T 298-2017)was applied for the assessment.Results The selected enterprises using BTX were mainly involved in manufacturing of products.Using the exposure level method,health risk levels associated with exposure to BTX were classified as medium,negligible,or low.However,the risk levels associated with benzene and toluene were significantly different according to job types,with gluers and inkers exhibiting greater health risks.For the same job type,the health risk levels assessed using the comprehensive index method were higher than those using the exposure level method.Conclusion Our OHRA reveals that workers who are exposed to BTX still face excessive health risk.Additionally,the risk level varied depending on job categories and exposure to specific chemicals.Therefore,additional control measures recommended by OHRA guidelines are essential to reduce worker exposure levels.
文摘Our purpose of this paper is to apply the improved Kudryashov method for solving various types of nonlinear fractional partial differential equations. As an application, the time-space fractional Korteweg-de Vries-Burger (KdV-Burger) equation is solved using this method and we get some new travelling wave solutions. To acquire our purpose a complex transformation has been also used to reduce nonlinear fractional partial differential equations to nonlinear ordinary differential equations of integer order, in the sense of the Jumarie’s modified Riemann-Liouville derivative. Afterwards, the improved Kudryashov method is implemented and we get our required reliable solutions where the results are justified by mathematical software Maple-13.
文摘目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为研究对象,共181名。将2016级84名学生分为线上组,接受《职业卫生与职业医学》的线上教学;2017级97名学生分为线下组,接受该课程的线下教学。将所有学生考试成绩录入试卷分析系统,在试卷质量分析基础上比较2组学生的考试成绩。结果2组学生期末考试试卷质量基本处于同等水平,试题分布及难易度较合理,差异无统计学意义(P>0.05),具有可比性,且2组学生成绩分布均呈现正态分布。进一步统计结果表明,线上组学生期末考试成绩高于线下组,差异有统计学意义(P<0.05)。线上组及格率高于线下组,差异有统计学意义(P<0.05)。结论在新医科背景下,基于中国大学MOOC在线平台的线上教学模式能明显提高《职业卫生与职业医学》课程的教学效果,这为新时代深入开展该课程的线上教学改革提供参考和思路。
基金by National Undergraduate Innovation Training Program of Anhui Xinhua University in 2022(202212216012)Provincial Undergraduate Innovation Training Program of Anhui Xinhua University in 2021(AH202112216119)+1 种基金Key Research Project of Natural Science in Colleges and Universities of Anhui Province(2023AH051816)General Teaching Research Project of Anhui Province(2022jyxm665).
文摘Through the analysis of the overall landscape,revetments and roads and plant landscape,10 evaluation factors were determined.The comprehensive evaluation model for the campus space of Anhui Xinhua University was constructed by analytic hierarchy process(AHP).The results showed that revetment safety,road convenience,plant disease resistance and campus activity space were important factors affecting the spatial form planning of campus.Through the comparative analysis of the collected data,optimization suggestions were put forward to provide a basis for the establishment of“people-oriented”campus open space system.
