As is known to all,Chinese people once again face the virus crisis-COVID-19.In the beginning,people all over China were in panic.But the epidemic is getting better with the efforts of all Chinese people.Many ordinary ...As is known to all,Chinese people once again face the virus crisis-COVID-19.In the beginning,people all over China were in panic.But the epidemic is getting better with the efforts of all Chinese people.Many ordinary people are playing a role in stopping the epidemic.My parents are among them.My father,a common government official.展开更多
Background:As an important indicator of subjective well-being(SWB),decent work is a key guarantee for the sustainable development of teachers and their psychological health and work quality.Faced with the rapid develo...Background:As an important indicator of subjective well-being(SWB),decent work is a key guarantee for the sustainable development of teachers and their psychological health and work quality.Faced with the rapid development of artificial intelligence and the global labor market,vocational college teachers are facing challenges such as workload pressure and limited career development,which may harm their well-being.This study aims to localize the measurement method of decent work in Chinese vocational education based on the theory of the Psychology of Working Theory,and explore the relationship mechanism between organizational support,career adaptability,decent work,and job satisfaction among vocational college teachers.Methods:A cross-sectional survey was conducted with 422 HVCU teachers in China(202 male,220 female)using the localized Perceived Organizational Support Scale,Career Adaptability Scale,Decent Work Scale,and Job Satisfaction Scale.Results:The overall level of HVCU teachers’decent work was above the median(Mean=4.09,SD=0.69),laying a foundation for their SWB.Decent work significantly and positively predicted job satisfaction(β=0.620,p<0.001).Organizational support(r=0.58,p<0.001)and career adaptability(r=0.82,p<0.001)can positively affect decent work,and further improve job satisfaction(collective R2 rising from 38.3%to 41.1%).Bootstrap analysis confirmed these mediating effects were robust.Conclusions:This study confirms that the combined effects of organizational support and career adaptability can enhance decent work,further improving teachers’job satisfaction and subsequent subjective well-being.Besides,this study provides an empirical basis for improving the well-being of higher vocational teachers and the sustainable development of vocational education,and has practical significance for improving the teacher incentive policy.展开更多
The development of non-corrosive and efficient anode interlayers(AILs)is pivotal for advancing highperformance organic optoelectronic devices.Conventional materials such as PEDOT:PSS,though widely adopted,suffer from ...The development of non-corrosive and efficient anode interlayers(AILs)is pivotal for advancing highperformance organic optoelectronic devices.Conventional materials such as PEDOT:PSS,though widely adopted,suffer from significant limitations including acidity,corrosion,and poor device stability.Herein,we propose a novel molecular design strategy by introducing p-πconjugation into a p Hneutral conjugated polyelectrolyte(CPE)(PIDT-T)to simultaneously enhance work function(WF)and electrical conductivity.Through doping with polyoxometalate(POM),the optimized PIDT-T:POM achieves a high WF of 4.85 e V,conductivity of 7.25×10^(-3)S cm^(-1),and>98%optical transmittance.In organic solar cells(OSCs),PIDT-T:POM delivers a power conversion efficiency(PCE)of 19.04%,outperforming PEDOT:PSS-based counterparts(18.52%)and representing one of the highest PCEs reported for devices utilizing non-acidic AILs.Moreover,organic light-emitting diodes(OLEDs)incorporating PIDTT:POM exhibit a remarkable reduction in turn-on voltage(from 5.8 to 3.0 V)and enhanced luminous efficiency,demonstrating its dual functionality for both OSCs and OLEDs.These findings establish p-πconjugated polyelectrolytes as a powerful molecular platform for next-generation,high-efficiency,and corrosion-free organic optoelectronic applications.展开更多
Your Excellency Li Yuanchao,Vice President of China,Your Excellency Jennifer Simons,Speaker of the National Assembly of Suriname,Your Excellency Lord Tu’ivakanō,Speaker of the Legislative Assembly of Tonga,Your Exce...Your Excellency Li Yuanchao,Vice President of China,Your Excellency Jennifer Simons,Speaker of the National Assembly of Suriname,Your Excellency Lord Tu’ivakanō,Speaker of the Legislative Assembly of Tonga,Your Excellency Rosana Alvarado,First Vice President of the National Assembly of Ecuador,Ladies and Gentlemen,dear friends,展开更多
WHEN they first entered the open door of China, foreign entrepreneurs probably did not expect that their coming would help to shorten the distance between ordinary Chinese women and developed countries of the outside ...WHEN they first entered the open door of China, foreign entrepreneurs probably did not expect that their coming would help to shorten the distance between ordinary Chinese women and developed countries of the outside world. In the Jinzhou Industry and Technology Development Zone in Dalian, Liaoning Province, a large number of young women whose families have been living a rural life for generations are working in foreign funded enterprises and are a major part of the labor force there.展开更多
In this paper, an efficient methodology for synthesizing the indirect work exchange networks(WEN) considering isothermal process and adiabatic process respectively based on transshipment model is first proposed. In co...In this paper, an efficient methodology for synthesizing the indirect work exchange networks(WEN) considering isothermal process and adiabatic process respectively based on transshipment model is first proposed. In contrast with superstructure method, the transshipment model is easier to obtain the minimum utility consumption taken as the objective function and more convenient for us to attain the optimal network configuration for further minimizing the number of units. Different from division of temperature intervals in heat exchange networks,different pressure intervals are gained according to the maximum compression/expansion ratio in consideration of operating principles of indirect work exchangers and the characteristics of no pressure constraints for stream matches. The presented approach for WEN synthesis is a linear programming model applied to the isothermal process, but for indirect work exchange networks with adiabatic process, a nonlinear programming model needs establishing. Additionally, temperatures should be regarded as decision variables limited to the range between inlet and outlet temperatures in each sub-network. The constructed transshipment model can be solved first to get the minimum utility consumption and further to determine the minimum number of units by merging the adjacent pressure intervals on the basis of the proposed merging methods, which is proved to be effective through exergy analysis at the level of units structures. Finally, two cases are calculated to confirm it is dramatically feasible and effective that the optimal WEN configuration can be gained by the proposed method.展开更多
At the Opening Ceremony of the 2018 Beijing Summit of the Forum on China-Africa Cooperation Beijing, September 3, 2018 Your Excellency President Matamela Cyril Ramaphosa,Your Excellency President Paul Kagame,Chairpers...At the Opening Ceremony of the 2018 Beijing Summit of the Forum on China-Africa Cooperation Beijing, September 3, 2018 Your Excellency President Matamela Cyril Ramaphosa,Your Excellency President Paul Kagame,Chairperson of the African Union,Distinguished Heads of State and Government,Distinguished Heads of Delegation,Your Excellency Mr. Antonio Guterres,Secretary General of the United Nations.展开更多
BACKGROUND Return to work(RTW)serves as an indication for young and middle-aged colorectal cancer(CRC)survivors to resume their normal social lives.However,these survivors encounter significant challenges during their...BACKGROUND Return to work(RTW)serves as an indication for young and middle-aged colorectal cancer(CRC)survivors to resume their normal social lives.However,these survivors encounter significant challenges during their RTW process.Hence,scientific research is necessary to explore the barriers and facilitating factors of returning to work for young and middle-aged CRC survivors.AIM To examine the current RTW status among young and middle-aged CRC survivors and to analyze the impact of RTW self-efficacy(RTW-SE),fear of progression(FoP),eHealth literacy(eHL),family resilience(FR),and financial toxicity(FT)on their RTW outcomes.METHODS A cross-sectional investigation was adopted in this study.From September 2022 to February 2023,a total of 209 participants were recruited through a convenience sampling method from the gastrointestinal surgery department of a class A tertiary hospital in Chongqing.The investigation utilized a general information questionnaire alongside scales assessing RTW-SE,FoP,eHL,FR,and FT.To analyze the factors that influence RTW outcomes among young and middle-aged CRC survivors,Cox regression modeling and Kaplan-Meier survival analysis were used.RESULTS A total of 43.54%of the participants successfully returned to work,with an average RTW time of 100 days.Cox regression univariate analysis revealed that RTW-SE,FoP,eHL,FR,and FT were significantly different between the non-RTW and RTW groups(P<0.05).Furthermore,Cox regression multivariate analysis identified per capita family monthly income,job type,RTW-SE,and FR as independent influencing factors for RTW(P<0.05).CONCLUSION The RTW rate requires further improvement.Elevated levels of RTW-SE and FR were found to significantly increase RTW among young and middle-aged CRC survivors.Health professionals should focus on modifiable factors,such as RTW-SE and FR,to design targeted RTW support programs,thereby facilitating their timely reintegration into mainstream society.展开更多
Zinc-ion batteries(ZIBs)are inexpensive and safe,but side reactions on the Zn anode and Zn dendrite growth hinder their practical applications.In this study,1,3,5-triformylphloroglycerol(Tp)and various diamine monomer...Zinc-ion batteries(ZIBs)are inexpensive and safe,but side reactions on the Zn anode and Zn dendrite growth hinder their practical applications.In this study,1,3,5-triformylphloroglycerol(Tp)and various diamine monomers(p-phenylenediamine(Pa),benzidine(BD),and 4,4"-diamino-p-terphenyl(DATP))were used to synthesize a series of two-dimensional covalent-organic frameworks(COFs).The resulting COFs were named TpPa,TpBD,and TpDATP,respectively,and they showed uniform zincophilic sites,different pore sizes,and high Young's moduli on the Zn anode.Among them,TpPa and TpBD showed lower surface work functions and higher ion transfer numbers,which were conducive to uniform galvanizing/stripping zinc and inhibited dendrite growth.Theoretical calculations showed that TpPa and TpBD had wider negative potential region and greater adsorption capacity for Zn2+than TpDATP,providing more electron donor sites to coordinate with Zn^(2+).Symmetric cells protected by TpPa and TpBD stably cycled for more than 2300 h,whereas TpDATP@Zn and the bare zinc symmetric cells failed after around 150 and200 h.The full cells containing TpPa and TpBD modification layers also showed excellent cycling capacity at 1 A/g.This study provides comprehensive insights into the construction of highly reversible Zn anodes via COF modification layers for advanced rechargeable ZIBs.展开更多
A Silk Road Think Tank Association Thematic Cloud Forum hosted by Silk Road Think Tank Association and co-organized by China Center for Contemporary World Studies(CCCWS)of International Department,CPC Central Committe...A Silk Road Think Tank Association Thematic Cloud Forum hosted by Silk Road Think Tank Association and co-organized by China Center for Contemporary World Studies(CCCWS)of International Department,CPC Central Committee and Chongyang Institute of Financial Studies,Renmin University of China was held in Beijing on April 24,2020.展开更多
On 25 April 2019,vips from around the world gathered together in the blossoming season of spring for the Thematic Forum on People-to-People Connectivity of the second Belt and Road Forum for International Cooperatio...On 25 April 2019,vips from around the world gathered together in the blossoming season of spring for the Thematic Forum on People-to-People Connectivity of the second Belt and Road Forum for International Cooperation(BRF)held at China National Convention Center.This event,one of the 12 thematic forums,was organized by the International Department of the CPC Central Committee and co-organized by 17 other ministries including the Office of the Central Guidance Commission for Building Spiritual Civilizations and the National Development and Reform Commission.It attracted 130 plus international vips from 61 countries of five continents.展开更多
When addressing the general debate of the 76th session of the United Nations General Assembly,Chinese President Xi Jinping proposed a Global Development Initiative seeking to promote harmony between man and nature.He ...When addressing the general debate of the 76th session of the United Nations General Assembly,Chinese President Xi Jinping proposed a Global Development Initiative seeking to promote harmony between man and nature.He called for efforts to improve global environmental governance,actively respond to climate change,and create a community of life for man and nature.President Xi Jinping also noted the need to accelerate the transition to a green and low-carbon economy and achieve green recovery and development.展开更多
At the Opening Ceremony of the First China International Import Expo Shanghai, 5 November 2018Your Excellencies Heads of State and Government,Your Royal Highness,Your Excellencies Heads of International Organizations,...At the Opening Ceremony of the First China International Import Expo Shanghai, 5 November 2018Your Excellencies Heads of State and Government,Your Royal Highness,Your Excellencies Heads of International Organizations,Your Excellencies Heads of Delegations,Distinguished vips,Ladies and Gentlemen.展开更多
Objectives:Teachers are facing unprecedented new challenges leading them to face an increasing number of tasks that are not part of their job,as well as having to cope with the additional skills acquisition that comes...Objectives:Teachers are facing unprecedented new challenges leading them to face an increasing number of tasks that are not part of their job,as well as having to cope with the additional skills acquisition that comes with non-traditional forms of teaching and learning,and increased work pressure leading to an increase in the rate of teachers leaving the profession.Therefore,this study aims to explore the mechanism of the career calling on job burnout through career adaptability and work engagement.Methods:This study conducted a cross-sectional survey of 465 primary and secondary school teachers(PSST)in China's Mainland from the perspective of work adjustment and used structural equation modeling(SEM)to examine the mediating roles of career adaptability and work engagement in the relationship between teachers’career calling and job burnout.Results:The results show that PSSTs are above average in career calling,career adaptability,and work engagement,while job burnout is below average.A significant positive or negative correlation exists between career calling,career adaptability,work engagement,and job burnout.The result of path analysis indicates that career adaptability and work engagement exert an indirect influence on the job burnout of PSST through three paths:namely,the independent intermediary role of career adaptability(EV=−0.144),the independent intermediary role of work engagement(EV=0.172)and the chain intermediary role of the two(EV=0.176).Conclusion:This study emphasizes the importance of career adaptability and work engagement in teacher development in regulating career calling and job burnout.Therefore,on the one hand,we think that if managers want to reduce teachers’job burnout,they need to pay more attention to teachers’career adaptability and work engagement,rather than relying solely on teachers’career calling.On the other hand,it is to remind teachers not to rely on their adjustment to adapt to the work,but also to need outside help as much as possible.展开更多
Bifunctional Ir catalysts for proton exchange membrane(PEM)water electrolysis offer transformative potential by streamlining electrolyzer while achieving efficient performance remains challenging due to the distinct c...Bifunctional Ir catalysts for proton exchange membrane(PEM)water electrolysis offer transformative potential by streamlining electrolyzer while achieving efficient performance remains challenging due to the distinct conditions required for oxygen and hydrogen evolution reaction(OER and HER).Herein,we propose a theory-directed design of Ir-based bifunctional catalysts,Ir nanoparticles supported on mesoporous carbon spheres embedded with MoSe_(2)(Ir/MoSe_(2)@MCS),leveraging a work function(WF)-induced spontaneous built-in electric field to enhance catalytic performance.They demonstrate exceptional kinetics for both OER and HER,and potential application in the practical PEM electrolyzer,showcasing the effectiveness of this innovative approach.Low overpotentials of 252 mV for OER and 28 mV for HER to drive 10 mA cm^(-2)were observed,and the PEM electrolyzer showed the current density of 2 A cm^(-2)at 1.87 V and maintained stable activity at 1.65 V for over 30 h to deliver 1 A cm^(-2).Density functional theory calculations reveal that the WF difference at Ir/MoSe_(2)interface induces a spontaneous built-in electric field with asymmetric charge distributions,that modulate the electronic environment and d-band center of Ir promoting bifunctional active phase formation.This significantly lowers reaction barriers for water splitting by balancing intermediate adsorption,endowing the bifunctional activity.展开更多
In this paper,the work hardening and softening behavior of AZ31 magnesium alloy sheets by hard plate accumulative roll bonding(HP-ARB)process in a specific temperature range was studied for the first time,and the cycl...In this paper,the work hardening and softening behavior of AZ31 magnesium alloy sheets by hard plate accumulative roll bonding(HP-ARB)process in a specific temperature range was studied for the first time,and the cyclic stress relaxation test,EBSD,TEM and other characterization methods were used.When the rolling temperature is 350℃,the grain size of magnesium sheets is refined to 4.32(±0.36)μm on average,and it shows an excellent combination of strength and plasticity.The tensile strength reaches 307(±8.52)MPa and the elongation is 12.73(±0.84)%.At this time,the curve of work hardening rate decreases smoothly and the degree of hardening is the lowest,and the amplitude of stress drop △σ_(p) in work softening test is the smallest with the increase of cycle times,which shows that the well coordination between work hardening and softening behavior has been achieved.Research has found that the combined effect of grain boundary strengthening and fine grain strengthening enhances the yield and tensile strength of magnesium sheets after three passes HP-ARB process at 350℃.This is attributed to the high degree of dislocation slip opening in the pyramidal surfaceand<c+a>,which not only coordinates the c-axis strain of the entire grain,but also promotes the slip transfer of dislocations in the fine-grained region,significantly improving the elongation of the sheets.This study provides a new idea for the forming and manufacturing of high performance magnesium alloy sheets.展开更多
To obtain the Ti_(p)with different aspect ratios,the Ti_(p)/Mg-5Zn-0.3Ca composite prepared by semi-solid stir casting was subjected to extrusion at 220℃,180℃,and 140℃,respectively.Then,the effect of the Ti_(p)’s ...To obtain the Ti_(p)with different aspect ratios,the Ti_(p)/Mg-5Zn-0.3Ca composite prepared by semi-solid stir casting was subjected to extrusion at 220℃,180℃,and 140℃,respectively.Then,the effect of the Ti_(p)’s aspect ratio on the microstructure,mechanical properties,work hardening and softening behaviors of Ti_(p)/Mg-5Zn-0.3Ca composites was investigated.The results indicated that the Ti_(p)could be elongated obviously after low-temperature extrusion,and the aspect ratio of which would reach to 13.7:1 as the extrusion temperature deceased to 140℃.Then the“Ti/Mg”layer-like structure was formed in the Ti_(p)/Mg-5Zn-0.3Ca composite.Accompanied with the elongation of Ti_(p),the dynamic recrystallized grains and dynamic precipitates were both refined significantly,however,the dynamic recrystallization rate changed a little.The elongated Ti_(p)endowed the Ti_(p)/Mg-5Zn-0.3Ca composites with better matching of strength and toughness without the sacrifice of elongation and bending strain.Both the work hardening rate and softening rate of Ti_(p)/Mg-5Zn-0.3Ca composites increased with the increasing aspect ratio of Ti_(p).The formation of“Ti/Mg”layer-like structure contributed to the redistribution of strain from large aggregations to a network-like distribution,which effectively suppresses the initiation and propagation of micro-cracks,thus enhancing the plasticity of the Ti_(p)/Mg-5Zn-0.3Ca composites.展开更多
On June 5,1972,the United Nations held the UN Conference on the Environment for the first time in Stockholm,the capital of Sweden,which adopted the famous Report of the United Nations Conference on the Human Environme...On June 5,1972,the United Nations held the UN Conference on the Environment for the first time in Stockholm,the capital of Sweden,which adopted the famous Report of the United Nations Conference on the Human Environment and the Action Plan for the Human Environment,and put forward the slogan“To Defend and Improve the Human Environment for Present and Future Generations.”展开更多
The"Working Together with One Heart"project,also known as the"One Heart Drum"project,is a collaboration skill development project,which assesses the collaboration skills of its team members.In this...The"Working Together with One Heart"project,also known as the"One Heart Drum"project,is a collaboration skill development project,which assesses the collaboration skills of its team members.In this paper,the method of combining actual problems with physical model analysis is used to determine the influence of different factors in the project operation,and a geometric analysis model is also established.Through MATLAB simulation and assignment operation,the optimal strategy of the project is finally obtained.展开更多
文摘As is known to all,Chinese people once again face the virus crisis-COVID-19.In the beginning,people all over China were in panic.But the epidemic is getting better with the efforts of all Chinese people.Many ordinary people are playing a role in stopping the epidemic.My parents are among them.My father,a common government official.
基金funded by Nanjing University of Posts and Telecommunications Humanities and Social Sciences Research Fund Project(NYY222055)Special research project on teaching reform of innovation and entrepreneurship education in Nanjing University of Posts and Telecommunications(GCSJG202528)+2 种基金General Subject of Educational Science Planning in Jiangsu Province(C/2024/01/76)General project of educational science research in Shanghai(C24288)Key funded project of Shandong Vocational Education Teaching Reform Research in 2022(2022052).
文摘Background:As an important indicator of subjective well-being(SWB),decent work is a key guarantee for the sustainable development of teachers and their psychological health and work quality.Faced with the rapid development of artificial intelligence and the global labor market,vocational college teachers are facing challenges such as workload pressure and limited career development,which may harm their well-being.This study aims to localize the measurement method of decent work in Chinese vocational education based on the theory of the Psychology of Working Theory,and explore the relationship mechanism between organizational support,career adaptability,decent work,and job satisfaction among vocational college teachers.Methods:A cross-sectional survey was conducted with 422 HVCU teachers in China(202 male,220 female)using the localized Perceived Organizational Support Scale,Career Adaptability Scale,Decent Work Scale,and Job Satisfaction Scale.Results:The overall level of HVCU teachers’decent work was above the median(Mean=4.09,SD=0.69),laying a foundation for their SWB.Decent work significantly and positively predicted job satisfaction(β=0.620,p<0.001).Organizational support(r=0.58,p<0.001)and career adaptability(r=0.82,p<0.001)can positively affect decent work,and further improve job satisfaction(collective R2 rising from 38.3%to 41.1%).Bootstrap analysis confirmed these mediating effects were robust.Conclusions:This study confirms that the combined effects of organizational support and career adaptability can enhance decent work,further improving teachers’job satisfaction and subsequent subjective well-being.Besides,this study provides an empirical basis for improving the well-being of higher vocational teachers and the sustainable development of vocational education,and has practical significance for improving the teacher incentive policy.
基金the financial support from the Beijing Municipal Science&Technology Commission(2242013)。
文摘The development of non-corrosive and efficient anode interlayers(AILs)is pivotal for advancing highperformance organic optoelectronic devices.Conventional materials such as PEDOT:PSS,though widely adopted,suffer from significant limitations including acidity,corrosion,and poor device stability.Herein,we propose a novel molecular design strategy by introducing p-πconjugation into a p Hneutral conjugated polyelectrolyte(CPE)(PIDT-T)to simultaneously enhance work function(WF)and electrical conductivity.Through doping with polyoxometalate(POM),the optimized PIDT-T:POM achieves a high WF of 4.85 e V,conductivity of 7.25×10^(-3)S cm^(-1),and>98%optical transmittance.In organic solar cells(OSCs),PIDT-T:POM delivers a power conversion efficiency(PCE)of 19.04%,outperforming PEDOT:PSS-based counterparts(18.52%)and representing one of the highest PCEs reported for devices utilizing non-acidic AILs.Moreover,organic light-emitting diodes(OLEDs)incorporating PIDTT:POM exhibit a remarkable reduction in turn-on voltage(from 5.8 to 3.0 V)and enhanced luminous efficiency,demonstrating its dual functionality for both OSCs and OLEDs.These findings establish p-πconjugated polyelectrolytes as a powerful molecular platform for next-generation,high-efficiency,and corrosion-free organic optoelectronic applications.
文摘Your Excellency Li Yuanchao,Vice President of China,Your Excellency Jennifer Simons,Speaker of the National Assembly of Suriname,Your Excellency Lord Tu’ivakanō,Speaker of the Legislative Assembly of Tonga,Your Excellency Rosana Alvarado,First Vice President of the National Assembly of Ecuador,Ladies and Gentlemen,dear friends,
文摘WHEN they first entered the open door of China, foreign entrepreneurs probably did not expect that their coming would help to shorten the distance between ordinary Chinese women and developed countries of the outside world. In the Jinzhou Industry and Technology Development Zone in Dalian, Liaoning Province, a large number of young women whose families have been living a rural life for generations are working in foreign funded enterprises and are a major part of the labor force there.
基金Supported by the National Natural Science Foundation of China(21576036 and 21776035)
文摘In this paper, an efficient methodology for synthesizing the indirect work exchange networks(WEN) considering isothermal process and adiabatic process respectively based on transshipment model is first proposed. In contrast with superstructure method, the transshipment model is easier to obtain the minimum utility consumption taken as the objective function and more convenient for us to attain the optimal network configuration for further minimizing the number of units. Different from division of temperature intervals in heat exchange networks,different pressure intervals are gained according to the maximum compression/expansion ratio in consideration of operating principles of indirect work exchangers and the characteristics of no pressure constraints for stream matches. The presented approach for WEN synthesis is a linear programming model applied to the isothermal process, but for indirect work exchange networks with adiabatic process, a nonlinear programming model needs establishing. Additionally, temperatures should be regarded as decision variables limited to the range between inlet and outlet temperatures in each sub-network. The constructed transshipment model can be solved first to get the minimum utility consumption and further to determine the minimum number of units by merging the adjacent pressure intervals on the basis of the proposed merging methods, which is proved to be effective through exergy analysis at the level of units structures. Finally, two cases are calculated to confirm it is dramatically feasible and effective that the optimal WEN configuration can be gained by the proposed method.
文摘At the Opening Ceremony of the 2018 Beijing Summit of the Forum on China-Africa Cooperation Beijing, September 3, 2018 Your Excellency President Matamela Cyril Ramaphosa,Your Excellency President Paul Kagame,Chairperson of the African Union,Distinguished Heads of State and Government,Distinguished Heads of Delegation,Your Excellency Mr. Antonio Guterres,Secretary General of the United Nations.
基金Supported by the Chongqing Medical University Program for Youth Innovation in Future Medicine,No.W0019Chongqing Municipal Education Commission’s 14th Five-Year Key Discipline Support Project,No.20240101 and No.20240102。
文摘BACKGROUND Return to work(RTW)serves as an indication for young and middle-aged colorectal cancer(CRC)survivors to resume their normal social lives.However,these survivors encounter significant challenges during their RTW process.Hence,scientific research is necessary to explore the barriers and facilitating factors of returning to work for young and middle-aged CRC survivors.AIM To examine the current RTW status among young and middle-aged CRC survivors and to analyze the impact of RTW self-efficacy(RTW-SE),fear of progression(FoP),eHealth literacy(eHL),family resilience(FR),and financial toxicity(FT)on their RTW outcomes.METHODS A cross-sectional investigation was adopted in this study.From September 2022 to February 2023,a total of 209 participants were recruited through a convenience sampling method from the gastrointestinal surgery department of a class A tertiary hospital in Chongqing.The investigation utilized a general information questionnaire alongside scales assessing RTW-SE,FoP,eHL,FR,and FT.To analyze the factors that influence RTW outcomes among young and middle-aged CRC survivors,Cox regression modeling and Kaplan-Meier survival analysis were used.RESULTS A total of 43.54%of the participants successfully returned to work,with an average RTW time of 100 days.Cox regression univariate analysis revealed that RTW-SE,FoP,eHL,FR,and FT were significantly different between the non-RTW and RTW groups(P<0.05).Furthermore,Cox regression multivariate analysis identified per capita family monthly income,job type,RTW-SE,and FR as independent influencing factors for RTW(P<0.05).CONCLUSION The RTW rate requires further improvement.Elevated levels of RTW-SE and FR were found to significantly increase RTW among young and middle-aged CRC survivors.Health professionals should focus on modifiable factors,such as RTW-SE and FR,to design targeted RTW support programs,thereby facilitating their timely reintegration into mainstream society.
基金financially supported by the National Natural Science Foundation of China(62464010)Spring City Plan-Special Program for Young Talents(K202005007)+3 种基金Yunnan Talents Support Plan for Yong Talents(XDYC-QNRC-2022-0482)Yunnan Local Colleges Applied Basic Research Projects(202101BA070001-138)Key Laboratory of Artificial Microstructures in Yunnan Higher EducationFrontier Research Team of Kunming University 2023。
文摘Zinc-ion batteries(ZIBs)are inexpensive and safe,but side reactions on the Zn anode and Zn dendrite growth hinder their practical applications.In this study,1,3,5-triformylphloroglycerol(Tp)and various diamine monomers(p-phenylenediamine(Pa),benzidine(BD),and 4,4"-diamino-p-terphenyl(DATP))were used to synthesize a series of two-dimensional covalent-organic frameworks(COFs).The resulting COFs were named TpPa,TpBD,and TpDATP,respectively,and they showed uniform zincophilic sites,different pore sizes,and high Young's moduli on the Zn anode.Among them,TpPa and TpBD showed lower surface work functions and higher ion transfer numbers,which were conducive to uniform galvanizing/stripping zinc and inhibited dendrite growth.Theoretical calculations showed that TpPa and TpBD had wider negative potential region and greater adsorption capacity for Zn2+than TpDATP,providing more electron donor sites to coordinate with Zn^(2+).Symmetric cells protected by TpPa and TpBD stably cycled for more than 2300 h,whereas TpDATP@Zn and the bare zinc symmetric cells failed after around 150 and200 h.The full cells containing TpPa and TpBD modification layers also showed excellent cycling capacity at 1 A/g.This study provides comprehensive insights into the construction of highly reversible Zn anodes via COF modification layers for advanced rechargeable ZIBs.
文摘A Silk Road Think Tank Association Thematic Cloud Forum hosted by Silk Road Think Tank Association and co-organized by China Center for Contemporary World Studies(CCCWS)of International Department,CPC Central Committee and Chongyang Institute of Financial Studies,Renmin University of China was held in Beijing on April 24,2020.
文摘On 25 April 2019,vips from around the world gathered together in the blossoming season of spring for the Thematic Forum on People-to-People Connectivity of the second Belt and Road Forum for International Cooperation(BRF)held at China National Convention Center.This event,one of the 12 thematic forums,was organized by the International Department of the CPC Central Committee and co-organized by 17 other ministries including the Office of the Central Guidance Commission for Building Spiritual Civilizations and the National Development and Reform Commission.It attracted 130 plus international vips from 61 countries of five continents.
文摘When addressing the general debate of the 76th session of the United Nations General Assembly,Chinese President Xi Jinping proposed a Global Development Initiative seeking to promote harmony between man and nature.He called for efforts to improve global environmental governance,actively respond to climate change,and create a community of life for man and nature.President Xi Jinping also noted the need to accelerate the transition to a green and low-carbon economy and achieve green recovery and development.
文摘At the Opening Ceremony of the First China International Import Expo Shanghai, 5 November 2018Your Excellencies Heads of State and Government,Your Royal Highness,Your Excellencies Heads of International Organizations,Your Excellencies Heads of Delegations,Distinguished vips,Ladies and Gentlemen.
基金funded by Humanities and Social Sciences Foundation and Natural Science Foundation of Nanjing University of Posts and Telecommunications(NYY222055,NY224176)General Subject of Educational Science Planning in Jiangsu Province(C/2024/01/76)National Natural Science Foundation of China(62307025).
文摘Objectives:Teachers are facing unprecedented new challenges leading them to face an increasing number of tasks that are not part of their job,as well as having to cope with the additional skills acquisition that comes with non-traditional forms of teaching and learning,and increased work pressure leading to an increase in the rate of teachers leaving the profession.Therefore,this study aims to explore the mechanism of the career calling on job burnout through career adaptability and work engagement.Methods:This study conducted a cross-sectional survey of 465 primary and secondary school teachers(PSST)in China's Mainland from the perspective of work adjustment and used structural equation modeling(SEM)to examine the mediating roles of career adaptability and work engagement in the relationship between teachers’career calling and job burnout.Results:The results show that PSSTs are above average in career calling,career adaptability,and work engagement,while job burnout is below average.A significant positive or negative correlation exists between career calling,career adaptability,work engagement,and job burnout.The result of path analysis indicates that career adaptability and work engagement exert an indirect influence on the job burnout of PSST through three paths:namely,the independent intermediary role of career adaptability(EV=−0.144),the independent intermediary role of work engagement(EV=0.172)and the chain intermediary role of the two(EV=0.176).Conclusion:This study emphasizes the importance of career adaptability and work engagement in teacher development in regulating career calling and job burnout.Therefore,on the one hand,we think that if managers want to reduce teachers’job burnout,they need to pay more attention to teachers’career adaptability and work engagement,rather than relying solely on teachers’career calling.On the other hand,it is to remind teachers not to rely on their adjustment to adapt to the work,but also to need outside help as much as possible.
文摘Bifunctional Ir catalysts for proton exchange membrane(PEM)water electrolysis offer transformative potential by streamlining electrolyzer while achieving efficient performance remains challenging due to the distinct conditions required for oxygen and hydrogen evolution reaction(OER and HER).Herein,we propose a theory-directed design of Ir-based bifunctional catalysts,Ir nanoparticles supported on mesoporous carbon spheres embedded with MoSe_(2)(Ir/MoSe_(2)@MCS),leveraging a work function(WF)-induced spontaneous built-in electric field to enhance catalytic performance.They demonstrate exceptional kinetics for both OER and HER,and potential application in the practical PEM electrolyzer,showcasing the effectiveness of this innovative approach.Low overpotentials of 252 mV for OER and 28 mV for HER to drive 10 mA cm^(-2)were observed,and the PEM electrolyzer showed the current density of 2 A cm^(-2)at 1.87 V and maintained stable activity at 1.65 V for over 30 h to deliver 1 A cm^(-2).Density functional theory calculations reveal that the WF difference at Ir/MoSe_(2)interface induces a spontaneous built-in electric field with asymmetric charge distributions,that modulate the electronic environment and d-band center of Ir promoting bifunctional active phase formation.This significantly lowers reaction barriers for water splitting by balancing intermediate adsorption,endowing the bifunctional activity.
基金supported by the Natural Science Foundation of Heilongjiang Province(No.JQ2022E004).
文摘In this paper,the work hardening and softening behavior of AZ31 magnesium alloy sheets by hard plate accumulative roll bonding(HP-ARB)process in a specific temperature range was studied for the first time,and the cyclic stress relaxation test,EBSD,TEM and other characterization methods were used.When the rolling temperature is 350℃,the grain size of magnesium sheets is refined to 4.32(±0.36)μm on average,and it shows an excellent combination of strength and plasticity.The tensile strength reaches 307(±8.52)MPa and the elongation is 12.73(±0.84)%.At this time,the curve of work hardening rate decreases smoothly and the degree of hardening is the lowest,and the amplitude of stress drop △σ_(p) in work softening test is the smallest with the increase of cycle times,which shows that the well coordination between work hardening and softening behavior has been achieved.Research has found that the combined effect of grain boundary strengthening and fine grain strengthening enhances the yield and tensile strength of magnesium sheets after three passes HP-ARB process at 350℃.This is attributed to the high degree of dislocation slip opening in the pyramidal surfaceand<c+a>,which not only coordinates the c-axis strain of the entire grain,but also promotes the slip transfer of dislocations in the fine-grained region,significantly improving the elongation of the sheets.This study provides a new idea for the forming and manufacturing of high performance magnesium alloy sheets.
基金supported by the“National Natural Science Foundation of China”(Grants.52271109 and 52001223)Support from the“National Key Research and Development Program for Young Scientists”(Grant.2021YFB3703300)+1 种基金the Major Special Plan for Science and Technology in Shanxi Province(202201050201012)the Special Fund Project for Guiding Local Science and Technology Development by the Central Government(Grant.YDZJSX2021B019)。
文摘To obtain the Ti_(p)with different aspect ratios,the Ti_(p)/Mg-5Zn-0.3Ca composite prepared by semi-solid stir casting was subjected to extrusion at 220℃,180℃,and 140℃,respectively.Then,the effect of the Ti_(p)’s aspect ratio on the microstructure,mechanical properties,work hardening and softening behaviors of Ti_(p)/Mg-5Zn-0.3Ca composites was investigated.The results indicated that the Ti_(p)could be elongated obviously after low-temperature extrusion,and the aspect ratio of which would reach to 13.7:1 as the extrusion temperature deceased to 140℃.Then the“Ti/Mg”layer-like structure was formed in the Ti_(p)/Mg-5Zn-0.3Ca composite.Accompanied with the elongation of Ti_(p),the dynamic recrystallized grains and dynamic precipitates were both refined significantly,however,the dynamic recrystallization rate changed a little.The elongated Ti_(p)endowed the Ti_(p)/Mg-5Zn-0.3Ca composites with better matching of strength and toughness without the sacrifice of elongation and bending strain.Both the work hardening rate and softening rate of Ti_(p)/Mg-5Zn-0.3Ca composites increased with the increasing aspect ratio of Ti_(p).The formation of“Ti/Mg”layer-like structure contributed to the redistribution of strain from large aggregations to a network-like distribution,which effectively suppresses the initiation and propagation of micro-cracks,thus enhancing the plasticity of the Ti_(p)/Mg-5Zn-0.3Ca composites.
文摘On June 5,1972,the United Nations held the UN Conference on the Environment for the first time in Stockholm,the capital of Sweden,which adopted the famous Report of the United Nations Conference on the Human Environment and the Action Plan for the Human Environment,and put forward the slogan“To Defend and Improve the Human Environment for Present and Future Generations.”
基金The Undergraduate Teaching Reform Research Project of Liaoning Institute of Science and Technology in 2021"Research and Practice on the Construction of‘Double Teachers and Dual Energy’Teachers in Applied Undergraduate Universities"(Grant Number:2021053)。
文摘The"Working Together with One Heart"project,also known as the"One Heart Drum"project,is a collaboration skill development project,which assesses the collaboration skills of its team members.In this paper,the method of combining actual problems with physical model analysis is used to determine the influence of different factors in the project operation,and a geometric analysis model is also established.Through MATLAB simulation and assignment operation,the optimal strategy of the project is finally obtained.
