The electrolyte integrated with lithium metal anodes is subjected to the issues of interfacial compatibility and stability,which strongly influence the performances of high-energy lithium metal batteries.Here,we repor...The electrolyte integrated with lithium metal anodes is subjected to the issues of interfacial compatibility and stability,which strongly influence the performances of high-energy lithium metal batteries.Here,we report a new electrolyte recipe viz.a moderately concentrated electrolyte comprising of 2.4 M lithium bis(fluorosulfonyl)imide(LiFSI)in a cosolvent mixture of fluorinated ethylene carbonate(FEC)and dimethyl carbonate(DMC)with relatively high ion conductivity.Owing to the preferential decomposition of LiFSI and FEC,an inorganic-rich interphase with abundant Li_(2)O and LiF nanocrystals is formed on lithium metal with improved robustness and ion transfer kinetics,enabling lithium plating/stripping with an extremely low overpotential of~8 mV and the average CE of 97%.When tested in Li||LiFePO_(4) cell,this electrolyte provides long-term cycling with a capacity retention of 98.3%after 1000 cycles at 1 C and an excellent rate performance of 20 C,as well as an areal capacity of 1.35 mA h cm^(-2)at the cathode areal loading of 9 mg cm^(-2).Moreover,the Li||LiFePO_(4) cell exhibits excellent wide-temperature performances(-40~60℃),including long-term cycling stability over 2600 cycles without visible capacity fading at 0℃,as well as extremely high average CEs of 99.6%and 99.8% over 400 cycles under-20℃ and 45℃.展开更多
The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge.Selecting a suitable mining system for such ore bodies is difficult.This paper proposes a diamond layout sublevel open ...The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge.Selecting a suitable mining system for such ore bodies is difficult.This paper proposes a diamond layout sublevel open stoping system using fan blastholes with backfilling to mine such orebodies.To evaluate the performance of system the relationships between ore recovery and stope footwall dip angle,footwall surface roughness,drawpoint spacing and production blast ring burden were investigated.An ore recovery data set from 81 laboratory physical model experiments was established from combinations of the listed factors.Various modules in a back propagation neural network structure were compared,and an optimal network structure identified.An ore recovery backpropagation neural network(BPNN)forecast model was developed.Using the model and sensitivity analysis of the factors affecting the proposed open stope mining system,the significance of each factor on ore recovery was studied.The study results were applied to a case study at the Shandong Gold Group Jiaojia Gold Mine.The results showed that the application of a BPNN and sensitivity analysis models for ore recovery prediction in the proposed mining system and field experimental results confirm that the suggested mining method is feasible.展开更多
The Hoek-Brown (HB) failure criterion and the geological strength index (GSI) were developed for the estimation of rock mass strength in jointed and blocky ground where rock mass failure is dominated by sliding along ...The Hoek-Brown (HB) failure criterion and the geological strength index (GSI) were developed for the estimation of rock mass strength in jointed and blocky ground where rock mass failure is dominated by sliding along open joints and rotation of rock blocks. In massive, veined and moderately jointed rock in which rock blocks cannot form without failure of intact rock, the approach to obtain HB parameters must be modified. Typical situations when these modifications are required include the design of pillars, excavation and cavern stability, strainburst potential assessment, and tunnel support in deep underground conditions (around σ1/σci > 0.15, where σ1 is the major principal compressive stress and σci is the unconfined compressive strength of the homogeneous rock) in hard brittle rocks with GSI ≥ 65. In this article, the strength of massive to moderately jointed hard rock masses is investigated, and an approach is presented to estimate the rock mass strength envelope using laboratory data from uniaxial and triaxial compressive strength tests without reliance on the HB-GSI equations. The data from tests on specimens obtained from massive to moderately jointed heterogeneous (veined) rock masses are used to obtain the rock and rock mass strengths at confining stress ranges that are relevant for deep tunnelling and mining;and a methodology is presented for this purpose from laboratory data alone. By directly obtaining the equivalent HB rock mass strength envelope for massive to moderately jointed rock from laboratory tests, the HB-GSI rock mass strength estimation approach is complemented for conditions where the GSIequations are not applicable. Guidance is also provided on how to apply the proposed approach when laboratory test data are not or not yet available.展开更多
A meshless local radial point interpolation method (LRPIM) for solving elastic dy-namic problems of moderately thick plates is presented in this paper. The discretized system equation of the plate is obtained using ...A meshless local radial point interpolation method (LRPIM) for solving elastic dy-namic problems of moderately thick plates is presented in this paper. The discretized system equation of the plate is obtained using a locally weighted residual method. It uses a radial basis function (RBF) coupled with a polynomial basis function as a trial function,and uses the quartic spline function as a test function of the weighted residual method. The shape function has the properties of the Kronecker delta function,and no additional treatment is done to impose essen-tial boundary conditions. The Newmark method for solving the dynamic problem is adopted in computation. Effects of sizes of the quadrature sub-domain and influence domain on the dynamic properties are investigated. The numerical results show that the presented method can give quite accurate results for the elastic dynamic problem of the moderately thick plate.展开更多
Background:Active-comparator trials are important to inform patient and physician choice.We aimed to evaluate the efficacy and safety of monotherapy with either ustekinumab or adalimumab in biologic-naive patients wit...Background:Active-comparator trials are important to inform patient and physician choice.We aimed to evaluate the efficacy and safety of monotherapy with either ustekinumab or adalimumab in biologic-naive patients with moderately to severely active Crohn's disease.展开更多
In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of China(east of longitude 180)are studied according to ...In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of China(east of longitude 180)are studied according to the famous Gutenberg-Richter’s relation expressed as lgN=a-bM,by using the moderate and small events that occurred in and around the source area.The results show that the linear goodness of fitting varies abnormally prior to these moderately strong earthquakes.In the early stage of the earthquake preparatory process,distribution of the energy released through small events in and around the source area is isostatic and the fitting goodness approximates 1,while the distribution of the energy turns to be isostatic before moderately strong earthquakes,leading to the obvious decrease of the linear goodness of fitting.This phenomenon could be a medium term anomaly and a medium term criterion for moderately strong earthquake prediction.展开更多
1 Introduction Yuncheng Salt Lake is an old lake with a history of more than 5000 years,which locates in the margins of the central plains of China,with an area of about 130 km.It was an important resource of salt for...1 Introduction Yuncheng Salt Lake is an old lake with a history of more than 5000 years,which locates in the margins of the central plains of China,with an area of about 130 km.It was an important resource of salt for human consumption from early times.Major chemicals in Yuncheng Salt Lake contain Na Cl,Na2SO4 and Mg SO4(Gao et al.2007).In recent years,some halophilic bacteria and archaea were展开更多
The overall bending of circular ring shells subjected to bending moments and lateral forces is discussed. The derivation of the equations was based upon the theory of flexible shells generalized by E.L. Axelrad and th...The overall bending of circular ring shells subjected to bending moments and lateral forces is discussed. The derivation of the equations was based upon the theory of flexible shells generalized by E.L. Axelrad and the assumption of the moderately slender ratio less than 1/3 (i.e., ratio between curvature radius of the meridian and distance from the meridional curvature center to the axis of revolution). The present general solution is an analytical one convergent in the whole domain of the shell and with the necessary integral constants for the boundary value problems. It can be used to calculate the stresses and displacements of the related bellows. The whole work is arranged into four parts: (Ⅰ) Governing equation and general solution; (Ⅱ) Calculation for Omega_shaped bellows; (Ⅲ) Calculation for C_shaped bellows; (Ⅳ) Calculation for U_shaped bellows. This paper is the first part.展开更多
The strain CUG00003T was isolated from the sediment of Erhai Lake of Qing Hai Province,China.Results of 16S r RNA gene sequence analyses indicated a close relationship(97%similarity)of the isolate to
Regulation of oxygen on properties of moderately boron-doped diamond films is fully investigated.Results show that,with adding a small amount of oxygen(oxygen-to-carbon ratio<5.0%),the crystal quality of diamond is...Regulation of oxygen on properties of moderately boron-doped diamond films is fully investigated.Results show that,with adding a small amount of oxygen(oxygen-to-carbon ratio<5.0%),the crystal quality of diamond is improved,and a suppression effect of residual nitrogen is observed.With increasing ratio of O/C from 2.5%to 20.0%,the hole concentration is firstly increased then reduced.This change of hole concentration is also explained.Moreover,the results of Hall effect measurement with temperatures from 300 K to 825 K show that,with adding a small amount of oxygen,boron and oxygen complex structures(especially B_(3)O and B_(4)O)are formed and exhibit as shallow donor in diamond,which results in increase of donor concentration.With further increase of ratio of O/C,the inhibitory behaviors of oxygen on boron leads to decrease of acceptor concentration(the optical emission spectroscopy has shown that it is decreased with ratio of O/C more than 10.0%).This work demonstrates that oxygen-doping induced increasement of the crystalline and surface quality could be restored by the co-doping with oxygen.The technique could achieve boron-doped diamond films with both high quality and acceptable hole concentration,which is applicable to electronic level of usage.展开更多
In this paper a stochastic boundary element method (SEEM) is developed to analyze moderately thick plates with random material parameters and random thickness. Based on the Taylor series expansion, the boundary integr...In this paper a stochastic boundary element method (SEEM) is developed to analyze moderately thick plates with random material parameters and random thickness. Based on the Taylor series expansion, the boundary integration equations concerning the mean and deviation of the generalized displacements are derived, respectively. It is found that the randomness of material parameters is equivalent to a random load, so the mean and covariance matrices of unknown generalized boundary displacements and tractions can be obtained. Furthermore, the mean and covariance of generalized displacements and forces at internal points can also be obtained. A numerical example has been worked out with the method proposed and necessary analysis is made for the results.展开更多
We present an algorithm for determining the stepsize in an explicit Runge-Kutta method that is suitable when solving moderately stiff differential equations. The algorithm has a geometric character, and is based on a ...We present an algorithm for determining the stepsize in an explicit Runge-Kutta method that is suitable when solving moderately stiff differential equations. The algorithm has a geometric character, and is based on a pair of semicircles that enclose the boundary of the stability region in the left half of the complex plane. The algorithm includes an error control device. We describe a vectorized form of the algorithm, and present a corresponding MATLAB code. Numerical examples for Runge-Kutta methods of third and fourth order demonstrate the properties and capabilities of the algorithm.展开更多
A 20 - DOF hybrid stress element based upon Mindlin plate theory is developed using the optimization design method for thin and moderately thick plates. Numerical tests consist of the convergency and performance to th...A 20 - DOF hybrid stress element based upon Mindlin plate theory is developed using the optimization design method for thin and moderately thick plates. Numerical tests consist of the convergency and performance to the plates with arbitrary thickness and shape and of the ultimate thin plate problems.展开更多
Over the past forty years of reform and opening up,the Communist Party of China(CPC)has led people of all ethnic groups in the country to carry out the practice of building a moderately prosperous society.Combining Ma...Over the past forty years of reform and opening up,the Communist Party of China(CPC)has led people of all ethnic groups in the country to carry out the practice of building a moderately prosperous society.Combining Marxism with the contemporary reality of China,the CPC has adapted Marxism to the Chinese context and enriched the theory of building a moderately prosperous society since its initiation.In practice,China already achieved the goal of ensuring the people a moderately prosperous life and is now striving to secure a decisive victory in building a moderately prosperous society in all respects,making tremendous progress in economic and social development.To complete the building of a moderately prosperous society in all respects and achieve the intended goal,China should accelerate the advancement of the targeted poverty alleviation strategy,continue to improve the people’s livelihood,and maintain sustained and sound economic and social development.展开更多
At the end of October,China’s oil giant PetroChina announced a 9.6-percent increase in its net profit for the first three quarters of 2013 as the company managed to adapt to market changes.Net profit during the Janua...At the end of October,China’s oil giant PetroChina announced a 9.6-percent increase in its net profit for the first three quarters of 2013 as the company managed to adapt to market changes.Net profit during the January-September period came in at 95.3 billion yuan(US$15.5billion),with earnings per share up 5.8 percent to 0.21yuan based on international financial reporting standards,the company said in a statement filed with the Shanghai Stock Exchange.Revenue was up 5.5 percent to 581.7billion yuan.展开更多
The past 40 years has seen the remarkable history of the building of not only socialism with Chinese characteristics but also a moderately prosperous society by the Chinese people led by the Communist Party of China.B...The past 40 years has seen the remarkable history of the building of not only socialism with Chinese characteristics but also a moderately prosperous society by the Chinese people led by the Communist Party of China.By 2020,China will have finished building a moderately prosperous society in all respects and realized the second strategic objective of the rejuvenation of the Chinese nation.展开更多
In this paper,approaches are developed to delineate the potential seismic source regions of moderately strong earthquakes that do not have clear seismotectonic settings.Based on comprehensive analysis of regional tect...In this paper,approaches are developed to delineate the potential seismic source regions of moderately strong earthquakes that do not have clear seismotectonic settings.Based on comprehensive analysis of regional tectonic backgrounds and seismicity,the data,such as isoseisrnals,spatial distribution of after shocks,regional tectonic stress field,and focal mechanisms,are employed for the delineation of the potential seismic source regions.The reliability of such potential seismic source regions is also discussed.展开更多
In the process of completing the building a moderately prosperous society in all respects,China has been paying increasing attention to the protection of human rights including various emerging human rights,with the h...In the process of completing the building a moderately prosperous society in all respects,China has been paying increasing attention to the protection of human rights including various emerging human rights,with the human rights protection system in China being improved.being an integral part of sports rights,the national fitness strategy advocated and promoted by China is a manifestation of the importance attached to sports rights,one of the emerging human rights.And as an important part of sports rights,it not only has diversified institutional connotations,but is also an important measure for completing the building a moderately prosperous society in all respects.China has improved the quality and effectiveness of sports rights protection with the nationwide fitness strategy,expanded the idea for realizing sports rights with the"internet+National fitness"model,and driven the modernization of sports rights protection by means of intelligent national fitness programs.Those practices reflect a holistic and institutionalized response to the national decision of completing the building a moderately prosperous society in all respects and have contributed to completing the all-round construction of a moderately well-off society in China.展开更多
Bringing the building a moderately prosperous society in all respects to successful completion is a great achievement in China’s modernization and contributes to the development of human rights in China and the world...Bringing the building a moderately prosperous society in all respects to successful completion is a great achievement in China’s modernization and contributes to the development of human rights in China and the world alike.The practice of building a moderately prosperous society in all respects has added new connotations to human rights theories,developing and outgrowing the traditional jurisprudence of human rights.This is reflected in the following aspects:the injection of the overall and equal human development has expanded the traditional western values of human rights based on human freedom and dignity;the injection of interpersonal mutual development,win-win cooperation and risk management and control has expanded the traditional western presupposition of social relations based on the social contract and civil society,and has thus expanded the social foundation of interpersonal cooperation,enriching the social concept of human rights.Guided by the concept of building a community with a shared future for human beings,the building a moderately prosperous society in all respects,enriching the human rights worldviews,has changed the worldviews of racism and zero-sum game among western developed countries and generated the new connotation that mankind should share the development opportunities and achievements.This has constituted a profound jurisprudence of human rights in China and formed an important discourse system in international human rights dialogue.展开更多
Scientists studying Alzheimer's have found that staying moderately active can lead to healthier brain functions in those at risk of developing the disease,potentially giving us another clue how to beat the conditi...Scientists studying Alzheimer's have found that staying moderately active can lead to healthier brain functions in those at risk of developing the disease,potentially giving us another clue how to beat the condition.In particular the research looked at glucose metabolism,the process that gives brain cells the right amount of fuel,and that also happens to break down with the onset of Alzheimer's.展开更多
基金the Innovation-Driven Project of Central South University(2019CX033)the National Natural Science Foundation of China(51904344 and 52172264)the Natural Science Foundation of Hunan Province of China(2021JJ10060 and 2022GK2033)。
文摘The electrolyte integrated with lithium metal anodes is subjected to the issues of interfacial compatibility and stability,which strongly influence the performances of high-energy lithium metal batteries.Here,we report a new electrolyte recipe viz.a moderately concentrated electrolyte comprising of 2.4 M lithium bis(fluorosulfonyl)imide(LiFSI)in a cosolvent mixture of fluorinated ethylene carbonate(FEC)and dimethyl carbonate(DMC)with relatively high ion conductivity.Owing to the preferential decomposition of LiFSI and FEC,an inorganic-rich interphase with abundant Li_(2)O and LiF nanocrystals is formed on lithium metal with improved robustness and ion transfer kinetics,enabling lithium plating/stripping with an extremely low overpotential of~8 mV and the average CE of 97%.When tested in Li||LiFePO_(4) cell,this electrolyte provides long-term cycling with a capacity retention of 98.3%after 1000 cycles at 1 C and an excellent rate performance of 20 C,as well as an areal capacity of 1.35 mA h cm^(-2)at the cathode areal loading of 9 mg cm^(-2).Moreover,the Li||LiFePO_(4) cell exhibits excellent wide-temperature performances(-40~60℃),including long-term cycling stability over 2600 cycles without visible capacity fading at 0℃,as well as extremely high average CEs of 99.6%and 99.8% over 400 cycles under-20℃ and 45℃.
基金funded by the State Key Research Development Program of China(2018YFC0604400)the National Science Foundation of China(No.51874068)+2 种基金the Fundamental Research Funds for the Central Universities(N160107001,N180701016)the 111 Project(B17009)Nazarbayev University for the Faculty Development Competitive Research Grant(240919FD3920)。
文摘The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge.Selecting a suitable mining system for such ore bodies is difficult.This paper proposes a diamond layout sublevel open stoping system using fan blastholes with backfilling to mine such orebodies.To evaluate the performance of system the relationships between ore recovery and stope footwall dip angle,footwall surface roughness,drawpoint spacing and production blast ring burden were investigated.An ore recovery data set from 81 laboratory physical model experiments was established from combinations of the listed factors.Various modules in a back propagation neural network structure were compared,and an optimal network structure identified.An ore recovery backpropagation neural network(BPNN)forecast model was developed.Using the model and sensitivity analysis of the factors affecting the proposed open stope mining system,the significance of each factor on ore recovery was studied.The study results were applied to a case study at the Shandong Gold Group Jiaojia Gold Mine.The results showed that the application of a BPNN and sensitivity analysis models for ore recovery prediction in the proposed mining system and field experimental results confirm that the suggested mining method is feasible.
基金Rio Tinto for sponsoring much of the work outlined in this article through the Rio Tinto Centre for Underground Mine Construction (an affiliate of CEMI)the financial contributions of NSERC (Natural Sciences and Engineering Research Council of Canada)
文摘The Hoek-Brown (HB) failure criterion and the geological strength index (GSI) were developed for the estimation of rock mass strength in jointed and blocky ground where rock mass failure is dominated by sliding along open joints and rotation of rock blocks. In massive, veined and moderately jointed rock in which rock blocks cannot form without failure of intact rock, the approach to obtain HB parameters must be modified. Typical situations when these modifications are required include the design of pillars, excavation and cavern stability, strainburst potential assessment, and tunnel support in deep underground conditions (around σ1/σci > 0.15, where σ1 is the major principal compressive stress and σci is the unconfined compressive strength of the homogeneous rock) in hard brittle rocks with GSI ≥ 65. In this article, the strength of massive to moderately jointed hard rock masses is investigated, and an approach is presented to estimate the rock mass strength envelope using laboratory data from uniaxial and triaxial compressive strength tests without reliance on the HB-GSI equations. The data from tests on specimens obtained from massive to moderately jointed heterogeneous (veined) rock masses are used to obtain the rock and rock mass strengths at confining stress ranges that are relevant for deep tunnelling and mining;and a methodology is presented for this purpose from laboratory data alone. By directly obtaining the equivalent HB rock mass strength envelope for massive to moderately jointed rock from laboratory tests, the HB-GSI rock mass strength estimation approach is complemented for conditions where the GSIequations are not applicable. Guidance is also provided on how to apply the proposed approach when laboratory test data are not or not yet available.
基金supported by the National 973 Scientific and Technological Innovation Project (No. 2004CB719402)National Natural Science Foundation of China (No. 10672055)+3 种基金Key Project of NSFC (No. 60635020)Natural Science Foundation for Out standing Youth of China (No. 50625519)Hunan Provincial Natural Science Foundation of China (No. 07JJ6002)Scientific Research Fund of Hunan Provincial Education Department of China (No. 08C230)
文摘A meshless local radial point interpolation method (LRPIM) for solving elastic dy-namic problems of moderately thick plates is presented in this paper. The discretized system equation of the plate is obtained using a locally weighted residual method. It uses a radial basis function (RBF) coupled with a polynomial basis function as a trial function,and uses the quartic spline function as a test function of the weighted residual method. The shape function has the properties of the Kronecker delta function,and no additional treatment is done to impose essen-tial boundary conditions. The Newmark method for solving the dynamic problem is adopted in computation. Effects of sizes of the quadrature sub-domain and influence domain on the dynamic properties are investigated. The numerical results show that the presented method can give quite accurate results for the elastic dynamic problem of the moderately thick plate.
文摘Background:Active-comparator trials are important to inform patient and physician choice.We aimed to evaluate the efficacy and safety of monotherapy with either ustekinumab or adalimumab in biologic-naive patients with moderately to severely active Crohn's disease.
文摘In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of China(east of longitude 180)are studied according to the famous Gutenberg-Richter’s relation expressed as lgN=a-bM,by using the moderate and small events that occurred in and around the source area.The results show that the linear goodness of fitting varies abnormally prior to these moderately strong earthquakes.In the early stage of the earthquake preparatory process,distribution of the energy released through small events in and around the source area is isostatic and the fitting goodness approximates 1,while the distribution of the energy turns to be isostatic before moderately strong earthquakes,leading to the obvious decrease of the linear goodness of fitting.This phenomenon could be a medium term anomaly and a medium term criterion for moderately strong earthquake prediction.
基金financially supported by National Natural Science Foundation of China (grants no. 31300002)Program for the Top Young Academic Leaders of Higher Learning Institutions of ShanxiPhD Start-up Foundation of Yuncheng University (grants no. YQ-2011043)
文摘1 Introduction Yuncheng Salt Lake is an old lake with a history of more than 5000 years,which locates in the margins of the central plains of China,with an area of about 130 km.It was an important resource of salt for human consumption from early times.Major chemicals in Yuncheng Salt Lake contain Na Cl,Na2SO4 and Mg SO4(Gao et al.2007).In recent years,some halophilic bacteria and archaea were
文摘The overall bending of circular ring shells subjected to bending moments and lateral forces is discussed. The derivation of the equations was based upon the theory of flexible shells generalized by E.L. Axelrad and the assumption of the moderately slender ratio less than 1/3 (i.e., ratio between curvature radius of the meridian and distance from the meridional curvature center to the axis of revolution). The present general solution is an analytical one convergent in the whole domain of the shell and with the necessary integral constants for the boundary value problems. It can be used to calculate the stresses and displacements of the related bellows. The whole work is arranged into four parts: (Ⅰ) Governing equation and general solution; (Ⅱ) Calculation for Omega_shaped bellows; (Ⅲ) Calculation for C_shaped bellows; (Ⅳ) Calculation for U_shaped bellows. This paper is the first part.
基金supported by the National Natural Science Foundation of China (Grant Nos. 41002123 & 41030211)Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lake, Chinese Academy of Sciences (No. KLSLRC-KF-13-DX-5)+1 种基金State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (No. GBL11201)the Fundamental Research Funds for National University, China University of Geosciences (Wuhan)
文摘The strain CUG00003T was isolated from the sediment of Erhai Lake of Qing Hai Province,China.Results of 16S r RNA gene sequence analyses indicated a close relationship(97%similarity)of the isolate to
基金Project supported by the National Key Research and Development Program of China(Grant Nos.2018YFB0406502,2017YFF0210800,and 2017YFB0403003)the National Natural Science Foundation of China(Grant Nos.61774081,61775203,61574075,61974059,61674077,and 91850112)+2 种基金the State Key Research and Development Project of Jiangsu,China(Grant No.BE2018115)State Key Laboratory of Wide-Bandgap Semiconductor Power Electric Devices(Grant No.2017KF001)Anhui University Natural Science Research Project(Grant No.KJ2021A0037)
文摘Regulation of oxygen on properties of moderately boron-doped diamond films is fully investigated.Results show that,with adding a small amount of oxygen(oxygen-to-carbon ratio<5.0%),the crystal quality of diamond is improved,and a suppression effect of residual nitrogen is observed.With increasing ratio of O/C from 2.5%to 20.0%,the hole concentration is firstly increased then reduced.This change of hole concentration is also explained.Moreover,the results of Hall effect measurement with temperatures from 300 K to 825 K show that,with adding a small amount of oxygen,boron and oxygen complex structures(especially B_(3)O and B_(4)O)are formed and exhibit as shallow donor in diamond,which results in increase of donor concentration.With further increase of ratio of O/C,the inhibitory behaviors of oxygen on boron leads to decrease of acceptor concentration(the optical emission spectroscopy has shown that it is decreased with ratio of O/C more than 10.0%).This work demonstrates that oxygen-doping induced increasement of the crystalline and surface quality could be restored by the co-doping with oxygen.The technique could achieve boron-doped diamond films with both high quality and acceptable hole concentration,which is applicable to electronic level of usage.
文摘In this paper a stochastic boundary element method (SEEM) is developed to analyze moderately thick plates with random material parameters and random thickness. Based on the Taylor series expansion, the boundary integration equations concerning the mean and deviation of the generalized displacements are derived, respectively. It is found that the randomness of material parameters is equivalent to a random load, so the mean and covariance matrices of unknown generalized boundary displacements and tractions can be obtained. Furthermore, the mean and covariance of generalized displacements and forces at internal points can also be obtained. A numerical example has been worked out with the method proposed and necessary analysis is made for the results.
文摘We present an algorithm for determining the stepsize in an explicit Runge-Kutta method that is suitable when solving moderately stiff differential equations. The algorithm has a geometric character, and is based on a pair of semicircles that enclose the boundary of the stability region in the left half of the complex plane. The algorithm includes an error control device. We describe a vectorized form of the algorithm, and present a corresponding MATLAB code. Numerical examples for Runge-Kutta methods of third and fourth order demonstrate the properties and capabilities of the algorithm.
基金Projects Supported by the National Natural Science Foundation of China
文摘A 20 - DOF hybrid stress element based upon Mindlin plate theory is developed using the optimization design method for thin and moderately thick plates. Numerical tests consist of the convergency and performance to the plates with arbitrary thickness and shape and of the ultimate thin plate problems.
基金This paper is a research result of the“Study of Theoretical Exploration on the CPC Central Committee’s Governance since the 18th CPC National Congress”(16ZZD023),a special program on new ideas,thoughts and strategies of the CPC Central Committee’s governance since the 18th CPC National Congress funded by the National Social Science Fund of China。
文摘Over the past forty years of reform and opening up,the Communist Party of China(CPC)has led people of all ethnic groups in the country to carry out the practice of building a moderately prosperous society.Combining Marxism with the contemporary reality of China,the CPC has adapted Marxism to the Chinese context and enriched the theory of building a moderately prosperous society since its initiation.In practice,China already achieved the goal of ensuring the people a moderately prosperous life and is now striving to secure a decisive victory in building a moderately prosperous society in all respects,making tremendous progress in economic and social development.To complete the building of a moderately prosperous society in all respects and achieve the intended goal,China should accelerate the advancement of the targeted poverty alleviation strategy,continue to improve the people’s livelihood,and maintain sustained and sound economic and social development.
文摘At the end of October,China’s oil giant PetroChina announced a 9.6-percent increase in its net profit for the first three quarters of 2013 as the company managed to adapt to market changes.Net profit during the January-September period came in at 95.3 billion yuan(US$15.5billion),with earnings per share up 5.8 percent to 0.21yuan based on international financial reporting standards,the company said in a statement filed with the Shanghai Stock Exchange.Revenue was up 5.5 percent to 581.7billion yuan.
文摘The past 40 years has seen the remarkable history of the building of not only socialism with Chinese characteristics but also a moderately prosperous society by the Chinese people led by the Communist Party of China.By 2020,China will have finished building a moderately prosperous society in all respects and realized the second strategic objective of the rejuvenation of the Chinese nation.
文摘In this paper,approaches are developed to delineate the potential seismic source regions of moderately strong earthquakes that do not have clear seismotectonic settings.Based on comprehensive analysis of regional tectonic backgrounds and seismicity,the data,such as isoseisrnals,spatial distribution of after shocks,regional tectonic stress field,and focal mechanisms,are employed for the delineation of the potential seismic source regions.The reliability of such potential seismic source regions is also discussed.
基金a staged outcome of the regular project of Shaanxi Provincial Sports Bureau in 2020,“Research on the Opportunities,Challenges and Legal Measures of Protecting the Sports Rights of the Elderly in Shaanxi Province in the New Era”(Project No.:2020057)the project of Xi’an Social Science Planning Fund in 2020,“Research on Legal Risks and Emergency Mechanisms of the 14th National Games”(Project No.:JY75).
文摘In the process of completing the building a moderately prosperous society in all respects,China has been paying increasing attention to the protection of human rights including various emerging human rights,with the human rights protection system in China being improved.being an integral part of sports rights,the national fitness strategy advocated and promoted by China is a manifestation of the importance attached to sports rights,one of the emerging human rights.And as an important part of sports rights,it not only has diversified institutional connotations,but is also an important measure for completing the building a moderately prosperous society in all respects.China has improved the quality and effectiveness of sports rights protection with the nationwide fitness strategy,expanded the idea for realizing sports rights with the"internet+National fitness"model,and driven the modernization of sports rights protection by means of intelligent national fitness programs.Those practices reflect a holistic and institutionalized response to the national decision of completing the building a moderately prosperous society in all respects and have contributed to completing the all-round construction of a moderately well-off society in China.
基金a staged result of the“Research on Socialist Core Values and the Cultivation of Rule of Law in National Honor,Commemoration and Celebration”(Project No.17AHJ002),a key project of the National Social Science Fund
文摘Bringing the building a moderately prosperous society in all respects to successful completion is a great achievement in China’s modernization and contributes to the development of human rights in China and the world alike.The practice of building a moderately prosperous society in all respects has added new connotations to human rights theories,developing and outgrowing the traditional jurisprudence of human rights.This is reflected in the following aspects:the injection of the overall and equal human development has expanded the traditional western values of human rights based on human freedom and dignity;the injection of interpersonal mutual development,win-win cooperation and risk management and control has expanded the traditional western presupposition of social relations based on the social contract and civil society,and has thus expanded the social foundation of interpersonal cooperation,enriching the social concept of human rights.Guided by the concept of building a community with a shared future for human beings,the building a moderately prosperous society in all respects,enriching the human rights worldviews,has changed the worldviews of racism and zero-sum game among western developed countries and generated the new connotation that mankind should share the development opportunities and achievements.This has constituted a profound jurisprudence of human rights in China and formed an important discourse system in international human rights dialogue.
文摘Scientists studying Alzheimer's have found that staying moderately active can lead to healthier brain functions in those at risk of developing the disease,potentially giving us another clue how to beat the condition.In particular the research looked at glucose metabolism,the process that gives brain cells the right amount of fuel,and that also happens to break down with the onset of Alzheimer's.