This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global ex...This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global existence and some regularity results for these equations.展开更多
[Objectives]To explore the evolution of the legal system of farmland protection and explore the rules and characteristics of policy development based on the theory and logic of institutional change since China's r...[Objectives]To explore the evolution of the legal system of farmland protection and explore the rules and characteristics of policy development based on the theory and logic of institutional change since China's reform and opening up,reveal the problems and deep-seated reasons of its legislation,clarify the direction of farmland protection in the new period,and solve the"non-agricultural""non-grain"and ecological problems of farmland.[Methods]Literature analysis and inductive deduction methods were used.[Results]The evolution of the farmland protection legal system has gone through the process of"national consciousness-policy guidelines-institutional system",the change from"single subject to multiple subjects";change from the use of"one-way administrative means to coordinated use of administrative,economic and technical means".The practical problems of the farmland protection legal system are mainly due to the insufficient systematization of the farmland protection legal system itself,the generalization of quantity protection,the transformation of quality protection,and the absence of ecological protection.[Conclusions]It is recommended to improve the existing farmland protection legal system from the establishment of the Farmland Protection Law,the improvement of the farmland protection public participation mechanism and supervision mechanism,the establishment of the farmland quality construction and improvement system,the differentiated farmland occupation and supplementation balance system,and the ecological restoration system.展开更多
The dual functions of government participation and governance in the development of the existing building energy-saving renovation market determine the importance of the government’s scientific and effective actions....The dual functions of government participation and governance in the development of the existing building energy-saving renovation market determine the importance of the government’s scientific and effective actions.Continuously improving the government’s role is to promote the effective operation of the existing building energy-saving renovation market.Based on the inherent requirements of improving the government governance capacity in the development of the existing building energy-saving renovation market,this paper constructs the implementation path for the development of the existing building’s energy-saving renovation market from the three dimensions of practical concept,practical process and practical methods.From the four aspects of improving the legal and regulatory system,building a market information sharing platform,establishing a sound market supervision mechanism,and consolidating and improving the market accountability system,we will structure the existing building energysaving renovation market development to improve the government’s ability to restrain and implement measures.From the four levels of improving the market incentive mechanism,optimizing the market financing environment,clarifying the position of market resource allocation,and building a social operation platform,design measures to improve government incentives in the development of the existing building energy conservation renovation market.From the shaping of governance yuan organizational roles,governance capacity and responsibilities of departments at all levels to define boundaries,to build four main interactive platform governance perspective,the main parties demand balance the interests of both the governance capacity development planning in the government market,building energy-saving market to enhance the implementation of countermeasures.In order to promote the healthy and sustainable development of the existing building energy-saving renovation market based on the enhancement of government governance capacity.展开更多
The main sources of nssSO 2- 4 and NO - 3 were summarized in this paper. By analyzing the spatial distribution features of major ions in Antarctic ice sheet and studying on the different time of the same volca...The main sources of nssSO 2- 4 and NO - 3 were summarized in this paper. By analyzing the spatial distribution features of major ions in Antarctic ice sheet and studying on the different time of the same volcanic event recorded by different ice cores from different regions in Antarctica, this paper intends to study the transmission path of nssSO 2- 4 and NO - 3. Results show that nssSO 2- 4 and NO - 3 are transmitted to the ice sheet through long distance and high altitude. The procedure of the transmission is that nssSO 2- 4 and NO - 3 are transmitted to the level between the top of troposphere and the bottom of stratosphere, then subsided to the ice sheet surface and spread to other regions.展开更多
In this paper, a semilinear elliptic-parabolic PDE system which arises in a two dimensional groundwater flow problem is studied. Existence and uniqueness results are established via the L ̄p - L ̄q a priori estimates ...In this paper, a semilinear elliptic-parabolic PDE system which arises in a two dimensional groundwater flow problem is studied. Existence and uniqueness results are established via the L ̄p - L ̄q a priori estimates and the inverse function theorem.展开更多
The key to the healthy development of the market for green renovation of existing settlements lies in effectively playing the role of market resource allocation,and scientific evaluation of the current market operatio...The key to the healthy development of the market for green renovation of existing settlements lies in effectively playing the role of market resource allocation,and scientific evaluation of the current market operation efficiency is a prerequisite for the optimization and adjustment of market operation.Based on the perspective of market operation effectiveness,we start from the connotation and significance of the evaluation of the operation efficiency of the market of green renovation of existing settlements,construct the evaluation index system of the operation efficiency of the market of green renovation of existing settlements,use the hierarchical analysis method(AHP)and fuzzy comprehensive evaluation method(Fuzzy),establish the fuzzy comprehensive evaluation model,and finally,based on the operation process reengineering,financing model innovation,service platform expansion and market environment improvement,it structures the operation improvement path of the green renovation market of existing settlements and promotes the orderly operation of the green renovation market of existing settlements.展开更多
"being"是由"Sis"(如Godis)这样的句式衍变而来,是系词"tobe"的现在分词形式或动名词形式,它的最基本、最核心的涵义就是"有"、"存有"(there-is)或"存在"(existence),由..."being"是由"Sis"(如Godis)这样的句式衍变而来,是系词"tobe"的现在分词形式或动名词形式,它的最基本、最核心的涵义就是"有"、"存有"(there-is)或"存在"(existence),由此派生出西方哲学史上关于"being"或"existence"是不是一个命题的逻辑谓词的长期论战。如果让"existence"(存在)不带时空含义、不具"现实性"意涵,则"存有"就是"存在","being"即"existence"。相反,如果让"existence"(存在)带上时空含义、具有"现实性"意涵,则"存有"不等于"存在","being"不等于"existence"。此外,"being"还与"实体"(sub-stance)、"本质"(essence)和"真理"(truth)有密切关联。"存有"、"实体"和"本质"都是把一个事物的一切具体特性P、Q、R、T等等抽象掉之后所留存下来的载体或基质,是决定一个事物之所是(what it is)或自身同一性的东西,是作为"存有物之存有"(beings qua being)。因此,国内哲学界先前把"being"译为"存在"或"存有"是有根据的,并无大错。"从古至今,一‘是’到底"的理解、诠释、翻译西方哲学的路径或策略,在理论上没有充分的根据,在汉语哲学实践中也行不通,因为它会造成许多完全无法理解的汉语句子,如把"是是是,不是不是"作为对"Being is being,not non-being"的汉译。展开更多
Changes in requirements may result in the increasing of product development project cost and lead time, therefore, it is important to understand how require- ment changes propagate in the design of complex product sys...Changes in requirements may result in the increasing of product development project cost and lead time, therefore, it is important to understand how require- ment changes propagate in the design of complex product systems and be able to select best options to guide design. Currently, a most approach for design change is lack of take the multi-disciplinary coupling relationships and the number of parameters into account integrally. A new design change model is presented to systematically analyze and search change propagation paths. Firstly, a PDS-Be- havior-Structure-based design change model is established to describe requirement changes causing the design change propagation in behavior and structure domains. Secondly, a multi-disciplinary oriented behavior matrix is utilized to support change propagation analysis of complex product systems, and the interaction relationships of the matrix elements are used to obtain an initial set of change paths. Finally, a rough set-based propagation space reducing tool is developed to assist in narrowing change propagation paths by computing the importance of the design change parameters. The proposed new design change model and its associated tools have been demonstrated by the scheduling change propagation paths of high speed train's bogie to show its feasibility and effectiveness. This model is not only supportive to response quickly to diversified market requirements, but also helpful to satisfy customer require- ments and reduce product development lead time. The proposed new design change model can be applied in a wide range of engineering systems design with improved efficiency.展开更多
ESCO is the internal driving force for the development of the existing building energy-saving renovation market,and the driving effect of the ESCO market depends on scientific and effective comprehensive benefit evalu...ESCO is the internal driving force for the development of the existing building energy-saving renovation market,and the driving effect of the ESCO market depends on scientific and effective comprehensive benefit evaluation.Based on analysis of the status qua at home and abroad,this paper reveals the necessity and value of research existing Building Energy Saving ESCO market development driving force effectiveness evaluation.The purpose of ESCO driving force benefit evaluation-oriented,establish the basic principles of evaluation index system of choice.Through the analysis of the evaluation content of the three dimensions of economic benefit,environmental benefit and social benefit,the comprehensive evaluation index system of the target level,criterion level and index level of the benefit evaluation of the existing building energy-saving renovation market development is constructed.AHP and fuzzy comprehensive evaluation of the combination,construct quantitative models of energy-saving drive ESCO market development role in the evaluation of the effectiveness of existing buildings.Based on the quantitative evaluation process of ESCO’s role in the development of our country’s existing building energysaving renovation market,it is necessary to scientifically understand the current status of ESCO’s driving role,and reveal the path to improve the efficiency of ESCO-driven development of the existing building’s energy-saving renovation market,in order to enhance the internal driving force of ESCO to promote.The existing building energy-saving renovation market is developing in a healthy and orderly manner.展开更多
The UAVs (unmanned aerial vehicles) and the use of graphical data files of extension KML (keyhole markup language) have become popular nowadays. The KML files are associated to the Google Earth applications. Devel...The UAVs (unmanned aerial vehicles) and the use of graphical data files of extension KML (keyhole markup language) have become popular nowadays. The KML files are associated to the Google Earth applications. Developed by Microdrone company for planning, overflight simulation and data flight analysis, the program mdCockpit was used in this experiment. The UAV Microdrone's flight path was programmed in two ways: using geo referenced images from Google Earth and entering points coordinates into the program. These points have had their geographical decimal coordinates collected by GPS (global positioning system) (RTK (real time kinematic)) method. The aim here is to describe a way of evaluating the difference between the alternatives of flight planning. A flight path, defined a route with 22 points, was also simulated in the program mdCockpit. The points were collected and saved, while the images captured by the program went automatically forming a georeferenced mosaic. A comparison between the differences of coordinates to each point was made by choosing on the images and also by a RTK positioning. The result was up to 14.20 m to a 100 m flight height. There is a significant change of position and this can result in unwanted over flights in locations or even jeopardizing the safety of air activity.展开更多
Reaction products of 2,4,6-tris(4-phenyl-phenoxy)-1,3,5-triazine derived from 4-phenylphenol cyanate ester and phenyl glycidyl ether were analyzed. In addition to an isocyanurate compound and an oxazolidone compound w...Reaction products of 2,4,6-tris(4-phenyl-phenoxy)-1,3,5-triazine derived from 4-phenylphenol cyanate ester and phenyl glycidyl ether were analyzed. In addition to an isocyanurate compound and an oxazolidone compound which were well known as reaction products of cyanate esters and epoxy resins, compounds with hybrid ring structure of cyanurate/isocyanurate were determined. Gibbs free energies of the compound having hybrid ring structure of cyanurate/isocyanurate with two isocyanurate moiety were found to be lower than that of the compound with cyanurate ring structure through calculations. Calculation data supported the existence of hybrid ring structure of cy-anurate/isocyanurate. It was revealed that isomerization from cyanurate to isocyanurate occurs via hybrid ring structure of cyanurate/isocyanurate in the reaction of aryl cyanurate and epoxy.展开更多
文摘This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global existence and some regularity results for these equations.
基金Supported by National Natural Science Foundation of China(41771565).
文摘[Objectives]To explore the evolution of the legal system of farmland protection and explore the rules and characteristics of policy development based on the theory and logic of institutional change since China's reform and opening up,reveal the problems and deep-seated reasons of its legislation,clarify the direction of farmland protection in the new period,and solve the"non-agricultural""non-grain"and ecological problems of farmland.[Methods]Literature analysis and inductive deduction methods were used.[Results]The evolution of the farmland protection legal system has gone through the process of"national consciousness-policy guidelines-institutional system",the change from"single subject to multiple subjects";change from the use of"one-way administrative means to coordinated use of administrative,economic and technical means".The practical problems of the farmland protection legal system are mainly due to the insufficient systematization of the farmland protection legal system itself,the generalization of quantity protection,the transformation of quality protection,and the absence of ecological protection.[Conclusions]It is recommended to improve the existing farmland protection legal system from the establishment of the Farmland Protection Law,the improvement of the farmland protection public participation mechanism and supervision mechanism,the establishment of the farmland quality construction and improvement system,the differentiated farmland occupation and supplementation balance system,and the ecological restoration system.
基金the National Natural Science Foundation of China(Grant No.71872122)Late-stage Subsidy Project of Humanities and Social Sciences of the Education Department of China(Grant No.20JHQ095)Higher Education Innovation Team of Tianjin(Grant No.TD13-5006)
文摘The dual functions of government participation and governance in the development of the existing building energy-saving renovation market determine the importance of the government’s scientific and effective actions.Continuously improving the government’s role is to promote the effective operation of the existing building energy-saving renovation market.Based on the inherent requirements of improving the government governance capacity in the development of the existing building energy-saving renovation market,this paper constructs the implementation path for the development of the existing building’s energy-saving renovation market from the three dimensions of practical concept,practical process and practical methods.From the four aspects of improving the legal and regulatory system,building a market information sharing platform,establishing a sound market supervision mechanism,and consolidating and improving the market accountability system,we will structure the existing building energysaving renovation market development to improve the government’s ability to restrain and implement measures.From the four levels of improving the market incentive mechanism,optimizing the market financing environment,clarifying the position of market resource allocation,and building a social operation platform,design measures to improve government incentives in the development of the existing building energy conservation renovation market.From the shaping of governance yuan organizational roles,governance capacity and responsibilities of departments at all levels to define boundaries,to build four main interactive platform governance perspective,the main parties demand balance the interests of both the governance capacity development planning in the government market,building energy-saving market to enhance the implementation of countermeasures.In order to promote the healthy and sustainable development of the existing building energy-saving renovation market based on the enhancement of government governance capacity.
文摘The main sources of nssSO 2- 4 and NO - 3 were summarized in this paper. By analyzing the spatial distribution features of major ions in Antarctic ice sheet and studying on the different time of the same volcanic event recorded by different ice cores from different regions in Antarctica, this paper intends to study the transmission path of nssSO 2- 4 and NO - 3. Results show that nssSO 2- 4 and NO - 3 are transmitted to the ice sheet through long distance and high altitude. The procedure of the transmission is that nssSO 2- 4 and NO - 3 are transmitted to the level between the top of troposphere and the bottom of stratosphere, then subsided to the ice sheet surface and spread to other regions.
文摘In this paper, a semilinear elliptic-parabolic PDE system which arises in a two dimensional groundwater flow problem is studied. Existence and uniqueness results are established via the L ̄p - L ̄q a priori estimates and the inverse function theorem.
基金supported by the National Natural Science Foundation of China(Grant No.71872122)the Late-stage Subsidy Project of Humanities and Social Sciences of the Education Department of China(Grant No.20JHQ095).
文摘The key to the healthy development of the market for green renovation of existing settlements lies in effectively playing the role of market resource allocation,and scientific evaluation of the current market operation efficiency is a prerequisite for the optimization and adjustment of market operation.Based on the perspective of market operation effectiveness,we start from the connotation and significance of the evaluation of the operation efficiency of the market of green renovation of existing settlements,construct the evaluation index system of the operation efficiency of the market of green renovation of existing settlements,use the hierarchical analysis method(AHP)and fuzzy comprehensive evaluation method(Fuzzy),establish the fuzzy comprehensive evaluation model,and finally,based on the operation process reengineering,financing model innovation,service platform expansion and market environment improvement,it structures the operation improvement path of the green renovation market of existing settlements and promotes the orderly operation of the green renovation market of existing settlements.
文摘"being"是由"Sis"(如Godis)这样的句式衍变而来,是系词"tobe"的现在分词形式或动名词形式,它的最基本、最核心的涵义就是"有"、"存有"(there-is)或"存在"(existence),由此派生出西方哲学史上关于"being"或"existence"是不是一个命题的逻辑谓词的长期论战。如果让"existence"(存在)不带时空含义、不具"现实性"意涵,则"存有"就是"存在","being"即"existence"。相反,如果让"existence"(存在)带上时空含义、具有"现实性"意涵,则"存有"不等于"存在","being"不等于"existence"。此外,"being"还与"实体"(sub-stance)、"本质"(essence)和"真理"(truth)有密切关联。"存有"、"实体"和"本质"都是把一个事物的一切具体特性P、Q、R、T等等抽象掉之后所留存下来的载体或基质,是决定一个事物之所是(what it is)或自身同一性的东西,是作为"存有物之存有"(beings qua being)。因此,国内哲学界先前把"being"译为"存在"或"存有"是有根据的,并无大错。"从古至今,一‘是’到底"的理解、诠释、翻译西方哲学的路径或策略,在理论上没有充分的根据,在汉语哲学实践中也行不通,因为它会造成许多完全无法理解的汉语句子,如把"是是是,不是不是"作为对"Being is being,not non-being"的汉译。
基金Supported by National Natural Science Foundation of China(Grant Nos.51305367,51575461)Doctoral Student Innovation Funds for Hai-Zhu Zhang from Southwest Jiaotong University,China
文摘Changes in requirements may result in the increasing of product development project cost and lead time, therefore, it is important to understand how require- ment changes propagate in the design of complex product systems and be able to select best options to guide design. Currently, a most approach for design change is lack of take the multi-disciplinary coupling relationships and the number of parameters into account integrally. A new design change model is presented to systematically analyze and search change propagation paths. Firstly, a PDS-Be- havior-Structure-based design change model is established to describe requirement changes causing the design change propagation in behavior and structure domains. Secondly, a multi-disciplinary oriented behavior matrix is utilized to support change propagation analysis of complex product systems, and the interaction relationships of the matrix elements are used to obtain an initial set of change paths. Finally, a rough set-based propagation space reducing tool is developed to assist in narrowing change propagation paths by computing the importance of the design change parameters. The proposed new design change model and its associated tools have been demonstrated by the scheduling change propagation paths of high speed train's bogie to show its feasibility and effectiveness. This model is not only supportive to response quickly to diversified market requirements, but also helpful to satisfy customer require- ments and reduce product development lead time. The proposed new design change model can be applied in a wide range of engineering systems design with improved efficiency.
基金supported by the National Natural Science Foundation of China(Grant No.71872122)Late-stage Subsidy Project of Humanities and Social Sciences of the Ministry of Education of China(20JHQ095)Higher Education Innovation Team of Tianjin(TD13-5006).
文摘ESCO is the internal driving force for the development of the existing building energy-saving renovation market,and the driving effect of the ESCO market depends on scientific and effective comprehensive benefit evaluation.Based on analysis of the status qua at home and abroad,this paper reveals the necessity and value of research existing Building Energy Saving ESCO market development driving force effectiveness evaluation.The purpose of ESCO driving force benefit evaluation-oriented,establish the basic principles of evaluation index system of choice.Through the analysis of the evaluation content of the three dimensions of economic benefit,environmental benefit and social benefit,the comprehensive evaluation index system of the target level,criterion level and index level of the benefit evaluation of the existing building energy-saving renovation market development is constructed.AHP and fuzzy comprehensive evaluation of the combination,construct quantitative models of energy-saving drive ESCO market development role in the evaluation of the effectiveness of existing buildings.Based on the quantitative evaluation process of ESCO’s role in the development of our country’s existing building energysaving renovation market,it is necessary to scientifically understand the current status of ESCO’s driving role,and reveal the path to improve the efficiency of ESCO-driven development of the existing building’s energy-saving renovation market,in order to enhance the internal driving force of ESCO to promote.The existing building energy-saving renovation market is developing in a healthy and orderly manner.
文摘The UAVs (unmanned aerial vehicles) and the use of graphical data files of extension KML (keyhole markup language) have become popular nowadays. The KML files are associated to the Google Earth applications. Developed by Microdrone company for planning, overflight simulation and data flight analysis, the program mdCockpit was used in this experiment. The UAV Microdrone's flight path was programmed in two ways: using geo referenced images from Google Earth and entering points coordinates into the program. These points have had their geographical decimal coordinates collected by GPS (global positioning system) (RTK (real time kinematic)) method. The aim here is to describe a way of evaluating the difference between the alternatives of flight planning. A flight path, defined a route with 22 points, was also simulated in the program mdCockpit. The points were collected and saved, while the images captured by the program went automatically forming a georeferenced mosaic. A comparison between the differences of coordinates to each point was made by choosing on the images and also by a RTK positioning. The result was up to 14.20 m to a 100 m flight height. There is a significant change of position and this can result in unwanted over flights in locations or even jeopardizing the safety of air activity.
文摘Reaction products of 2,4,6-tris(4-phenyl-phenoxy)-1,3,5-triazine derived from 4-phenylphenol cyanate ester and phenyl glycidyl ether were analyzed. In addition to an isocyanurate compound and an oxazolidone compound which were well known as reaction products of cyanate esters and epoxy resins, compounds with hybrid ring structure of cyanurate/isocyanurate were determined. Gibbs free energies of the compound having hybrid ring structure of cyanurate/isocyanurate with two isocyanurate moiety were found to be lower than that of the compound with cyanurate ring structure through calculations. Calculation data supported the existence of hybrid ring structure of cy-anurate/isocyanurate. It was revealed that isomerization from cyanurate to isocyanurate occurs via hybrid ring structure of cyanurate/isocyanurate in the reaction of aryl cyanurate and epoxy.