This paper mainly studies the blowup phenomenon of solutions to the compressible Euler equations with general time-dependent damping for non-isentropic fluids in two and three space dimensions. When the initial data i...This paper mainly studies the blowup phenomenon of solutions to the compressible Euler equations with general time-dependent damping for non-isentropic fluids in two and three space dimensions. When the initial data is assumed to be radially symmetric and the initial density contains vacuum, we obtain that classical solution, especially the density, will blow up on finite time. The results also reveal that damping can really delay the singularity formation.展开更多
It is an important way to realize rural revitalization and sustainable development to guide rural settlement transition(RST)in an appropriate way.This paper uses actor network theory(ANT)to construct a theoretical fra...It is an important way to realize rural revitalization and sustainable development to guide rural settlement transition(RST)in an appropriate way.This paper uses actor network theory(ANT)to construct a theoretical framework for the study of RST.Taking two typical villages with different transition paths in rural areas of North China Plain as examples,this paper reveals the mechanism of RST and makes a comparative analysis.The results show that:1)after identifying problems and obligatory passage point,key actors recruit heterogeneous actors into the actor network by entrusting them with common interests,and realize RST under the system operation.2)Rural settlements under different transition paths have similarities in the problems to be solved,collective actions and policy factors,but there are differences in the transition process,mechanism and effect.The actor network and mechanism of RST through the path of new rural community construction are more complex and the transition effect is more thorough.In contrast,the degree of RST of retention development path is limited if there is no resource and location advantage.3)Based on the applicable conditions of different paths,this paper designs a logical framework of‘Situation-Structure-Behavior-Result’to scientifically guide the identification of RST paths under the background of rural revitalization.展开更多
This paper considers a linear-quadratic(LQ) meanfield game governed by a forward-backward stochastic system with partial observation and common noise,where a coupling structure enters state equations,cost functionals ...This paper considers a linear-quadratic(LQ) meanfield game governed by a forward-backward stochastic system with partial observation and common noise,where a coupling structure enters state equations,cost functionals and observation equations.Firstly,to reduce the complexity of solving the meanfield game,a limiting control problem is introduced.By virtue of the decomposition approach,an admissible control set is proposed.Applying a filter technique and dimensional-expansion technique,a decentralized control strategy and a consistency condition system are derived,and the related solvability is also addressed.Secondly,we discuss an approximate Nash equilibrium property of the decentralized control strategy.Finally,we work out a financial problem with some numerical simulations.展开更多
Wetland is one of the most important ecosystems with varied functions and structures,and its loss has been a major issue.Wetland loss in Modem Yellow River Delta(MYRD) becomes a serious environmental problem,so its re...Wetland is one of the most important ecosystems with varied functions and structures,and its loss has been a major issue.Wetland loss in Modem Yellow River Delta(MYRD) becomes a serious environmental problem,so its restoration attracts a great deal of attention from academia and governments.This article proposes a GIS-based multi-criteria comprehensive evaluation methodology for potential estimation of wetland restoration,using MYRD as an example.The model uses four kinds of data(hydrology,terrain,soil,and land use) and could be adapted by planners for use in identifying the suitability of locations as wetland mitigation sites at any site or region.In the application of the model in the MYRD,the research developed a lost wetland distributed map taking the better wetland situation of 1995 as the reference,and elevated the overall distribution trends of wetland restoration potential based on wetland polygon.The results indicated that the total area of wetland loss from 1995 to 2014 was 568.12 km^2,which includes 188.83 km^2 natural wetland and 21.80 km^2 artificial wetland,respectively.The areas of lost wetland with low,middle,and high resilience ability are 126.82 km^2,259.92 km^2,and 119.59 km^2,occupying 25.05%,51.33%,and 23.62%,respectively.The high-restoration-potential wetland included98.47 km^2 of natural wetland and 21.12 km^2 of artificial wetland,which are mainly bush,reed,and ponds.The highrestoration-potential wetland is mainly distributed in the vicinity of Gudong oil field,the Yellow River Delta protected areas,and the eastern sides of Kenli county and Dongying city.展开更多
The rapid development of urbanization has led to a rapid increase in total energy consumption.The proportion of domestic energy consumption to total energy consumption has gradually increased and has become the major ...The rapid development of urbanization has led to a rapid increase in total energy consumption.The proportion of domestic energy consumption to total energy consumption has gradually increased and has become the major driving force for energy consumption.With the pressure from urbanization and domestic energy consumption,it is necessary to study the impact of urbanization on domestic energy consumption of the regional level and to explore the function paths of these two factors.The findings are helpful to realize sustainable development based on the actual situation analysis,horizontal survey data and statistical yearbook panel data.The current situation and changing trends in domestic energy consumption of Shandong Province are systematically examined through field investigation and survey questionnaire.The time-series econometric model is applied to analyze the relationship between urbanization rate and total domestic energy consumption.The research results show that the total domestic energy consumption and urbanization rate of Shandong are generally increasing.The urbanization rate development and domestic energy consumption have a long-term stable and balanced relationship.An increase in urbanization rate can cause an increase in domestic energy consumption.There is a slight difference between the average total energy consumption levels of urban and rural residents,but their energy consumption structures differ a lot.These findings provide basic data support and reference for local governments to formulate energy-conservation and emission-reduction policies.展开更多
Based on the Panel Data of Shan dong Province of 17 regions, by estimating varying coefficient models, studies the relationship between financial development and industrial structure.The results show that, on the whol...Based on the Panel Data of Shan dong Province of 17 regions, by estimating varying coefficient models, studies the relationship between financial development and industrial structure.The results show that, on the whole, the financial development indicators-the scale and the efficiency can effectively promote industrial restructuring in all regions of Shandong province, but its role has obvious differences in different regions, so it can provide a basis for economic decision-making and financial policy advice.展开更多
Long-lasting expansion of haze pollution in China has already presented a stern challenge to regional joint prevention and control. There is an urgent need to enlarge and reconstruct the coverage of joint prevention a...Long-lasting expansion of haze pollution in China has already presented a stern challenge to regional joint prevention and control. There is an urgent need to enlarge and reconstruct the coverage of joint prevention and control of air pollution in key area. Air quality models can identify and quantify the regional contribution of haze pollution and its key components with the help of numerical simulation, but it is difficult to be applied to larger spatial scale due to the complexity of model parameters. The time series analysis can recognize the existence of spatial interaction of haze pollution between cities, but it has not yet been used to further identify the spatial sources of haze pollution in large scale. Using econometric framework of time series analysis, this paper developed a new approach to perform spatial source apportionment. We applied this approach to calculate the contribution from spatial sources of haze pollution in China, using the monitoring data of particulate matter(PM_(2.5)) across 161 Chinese cities. This approach overcame the limitation of numerical simulation that the model complexity increases at excess with the expansion of sample range, and could effectively deal with severe large-scale haze episodes.展开更多
Since rural microfinance is a credit which grants loans without collateral and guarantees to farmers,it is considerably important to evaluate and control the household credit risk.Through establishing the evaluation i...Since rural microfinance is a credit which grants loans without collateral and guarantees to farmers,it is considerably important to evaluate and control the household credit risk.Through establishing the evaluation index system and then using catastrophe progression theory,three common types of catastrophe system and the normalization formula,we get the comprehensive evaluation.Finally,we take the empirical test and the result shows that this method is simpler and more objective which can be used by the credit cooperatives to decide whether to authorize the loans.展开更多
Pig production efficiency and its regional differences in China have strategic importance to the transformation of pig production mode and optimization of pig production layout in China. In this paper,Malmquist-DEA mo...Pig production efficiency and its regional differences in China have strategic importance to the transformation of pig production mode and optimization of pig production layout in China. In this paper,Malmquist-DEA model is adopted to analyze the statistical data; TFP and its decomposition indicators of different pig breeding scale among the top ten pig producing provinces are calculated; both horizontal and longitudinal comparisons are made. Results show that among different pig breeding scales,free-range breeding scale is dominant in Hunan,small breeding scale is dominant in Sichuan,medium breeding scale is dominant in Sichuan and Hunan,and large breeding scale is dominant in Sichuan,Shandong and Jiangsu; among the provinces,pig production efficiency varies with breeding scale,and small-scale pig breeding in Sichuan,Guangdong and Hebei,free-range and medium-scale pig breeding in Hunan,medium-scale pig breeding in Henan and Yunnan,largescale pig breeding in the rest of the provinces,have significant efficiency advantage.展开更多
This paper investigates the gap of demographic urbanization arising from the difference between rural residents who have migrated to cities and those who have acquired urban citizenship in the process of China's u...This paper investigates the gap of demographic urbanization arising from the difference between rural residents who have migrated to cities and those who have acquired urban citizenship in the process of China's urbanization. The skyrocketing house prices and insufficient household consumption power are key factors to the widening gap, which had reached 18% in 2013. In order to explore this issue, by creating the basic model and the model with interaction term, this paper has analyzed the relationship among house prices, consumption power and gap of urbanization using the data of 31 provinces between 1999 and 2013 in China. Empirical result indicates that: there is a positive correlation between the house prices and the gap of China's demographic urbanization. However, such a correlation is restrained by these rural migrants who rent houses in cities. For an increase of house price by 1%, the gap of urbanization will widen by 1.05%. Although rising urban consumption power of rural residents has increased the ratio of migration, the lagged growth of consumption power has led to a widening gap of urbanization. Therefore, the only way to effectively reduce the gap of demographic urbanization is to increase the consumption power of migrant population and optimize consumption structure.展开更多
Non-point source （NPS） pollution is the main threat to regional water quality, and the estimation of NPS pollution load has become an important task for NPS pollution control in China. Combined with geographical inf...Non-point source （NPS） pollution is the main threat to regional water quality, and the estimation of NPS pollution load has become an important task for NPS pollution control in China. Combined with geographical information system （GIS）, the long. term hydrologic impact assessment （L-THIA） model was used to evaluate the temporal.spatial changes of chemical oxygen demand （COD）, total nitrogen （TN） and total phosphorus （TP） in Nansi Lake basin from 2000 to 2010. The results show： 1 ） the estimated COD, TN and TP loads in 2010 are 260017.5, 111607. 7 and 6372.0 t with the relative errors of 2.1%, 2. 0 % and - 8.8 % respectively, and more than 90% concentrated in the raining period from June to September; 2） cultivated land and construction land take up more than 80% of the whole Nansi Lake basin, and the proportions of the three kinds of NPS pollution loads coming from cultivated land and construction land are more than 98%; 3 ） during 2000- 2010, the COD, TN and TP loads increase by 8801. 6, 180.3 and 71.9 t respectively, and become the main impact factors on the water quality of Nansi Lake.展开更多
Construction and demolition(C&D)waste has seriously affected the ecological environment.The utilization of C&D waste resources can greatly alleviate this problem,and it is an important way to help achieve the ...Construction and demolition(C&D)waste has seriously affected the ecological environment.The utilization of C&D waste resources can greatly alleviate this problem,and it is an important way to help achieve the goal of zero carbon in 2050.In this study,insulation concrete blocks were developed with recycled aggregates,cement,fly ash as main raw materials,expanded polystyrene(EPS)insulation boards as block insulation filling material,and selfdeveloped construction waste composite activator,interface enhancer,surface modifier and other additives.Through experimental research and performance test analysis,the best mix ratio of the product and the mechanism of each additive were proved.The experimental results showed that the insulation concrete block prepared under the conditions of recycled aggregates sand ratio of 45%,active activator Na_(2)SO_(4)content of 0.15%and fly ash content of 30%has the best performance and meets the relevant standards.展开更多
With the rapid development of the computer technologies, the rapid spread and development of the network resources have a significant impact on people's thinking and lifestyle. The ideological and political educat...With the rapid development of the computer technologies, the rapid spread and development of the network resources have a significant impact on people's thinking and lifestyle. The ideological and political education in colleges and universities should keep pace with the times, and examine the new ways and resources of the ideological and political education in colleges and universities from the perspective of the times. The high-tech has been applied to the development of the modem education, expanding the teaching space-time, improving the teaching methods of the ideological and political course, and enriching the teaching contents of the ideological and political theoretical courses. The development mechanism of the ideological and political education resources for college students based on the data mining technology is not only in line with the trend of the times, but can also play an ideal role in optimizing the ideological and political education mechanism for college students.展开更多
China is the world＇s most populous country, but also serious ageing country. In the area of social security, was introduced in 2013, ＂the aged with housing＂ and ＂delay＂ of policy measures, also is trying to make ...China is the world＇s most populous country, but also serious ageing country. In the area of social security, was introduced in 2013, ＂the aged with housing＂ and ＂delay＂ of policy measures, also is trying to make the pension ＂dual track＂ unified.展开更多
From the date of birth, the fiscal and taxation law in China is always rooted in Chinese land, Chinese resources and aimed at solving Chinese problem.As a famous scholar on the fiscal and taxation law professor Jianwe...From the date of birth, the fiscal and taxation law in China is always rooted in Chinese land, Chinese resources and aimed at solving Chinese problem.As a famous scholar on the fiscal and taxation law professor Jianwen liu once said： ＂the fiscal and taxation law is a very important law, it not only involves the entire country macro economic operation but also involves the interests of families and everyone＇s interests.＂This article will combine professor Jianwen Liu＇ s research results in the past two years, from the view of the field of law to discuss why the fiscal and taxation law known as public property.展开更多
With the new curriculum reform put into effect, new requirements and plans for college English teaching have been put forward. More and more attention has been paid to Chinese college English teaching from all aspects...With the new curriculum reform put into effect, new requirements and plans for college English teaching have been put forward. More and more attention has been paid to Chinese college English teaching from all aspects, among which, psycholinguistics is a new frontier subject. The application of psycholinguistic principles in education is more extensive. The research on the osmotic application of psycholinguistic principles in Chinese college English teaching is becoming the focus of education. This paper briefly introduces the characteristics and basic situation of English teaching in Chinese colleges, and the application of psycholinguistic principles in Chinese college English teaching is expounded. The purpose of this study is to understand the principles of psycholinguistics in English teaching in Chinese universities. It is hoped to play a positive role in promoting college English teaching innovation in China.展开更多
So many legal issues can be handled in public interest method. As some commentators have pointed out, the public interest is an ancient and new topic. It＇s a highly abstract prone to ambiguities and shortcomings of t...So many legal issues can be handled in public interest method. As some commentators have pointed out, the public interest is an ancient and new topic. It＇s a highly abstract prone to ambiguities and shortcomings of the concept. And it＇s also a basket that strange, confused and can not be discarded. Even critics simply deny the existence of public interest and regard the public interest as a myth. As it＇s difficult to define the public interest from political perspective, a democratic theory, legal perspective a theory of law, economic perspective a public choice theory, philosophical perspective a public philosophy, and other common perspective. The paper explores the law theory of public interest from the framework of the overflow theory and the perspective of the concept function, and provides an easy to use identification method of public interest for the judicial practice and administrative practices.展开更多
In recent years, more and more people choose to become civil servants for stability of the work and respect of the society. Civil servants not only have a better treatment, but also a higher social status. However, th...In recent years, more and more people choose to become civil servants for stability of the work and respect of the society. Civil servants not only have a better treatment, but also a higher social status. However, the condition is not true in England. This thesis will demonstrate the current condition of ＂Government Office Worker Craze＂, meanwhile, analyze the reasons of this phenomenon by comparing with England. The thesis will firstly display the advantages and disadvantages of this phenomenon; then demonstrate traditional understanding of the two countries separately to find out common characters; the reason of ＂Government Office Worker Craze ＂ in China by exploring the historical cultures; finally, the thesis shows intersections between the two countries and give proper suggestions.展开更多
In China, major shareholders of private listed enterprise could control its production and operation by virtue of few resources which makes it possible for ultimate controlling shareholders to expropriate minority sha...In China, major shareholders of private listed enterprise could control its production and operation by virtue of few resources which makes it possible for ultimate controlling shareholders to expropriate minority shareholders＇ rights and interests.In this paper, we studied the relationship between ultimate controlling shareholders and business performance of private enterprises based on the theory of ultimate controlling shareholders and made relevant conclusions and recommendations.展开更多
文摘This paper mainly studies the blowup phenomenon of solutions to the compressible Euler equations with general time-dependent damping for non-isentropic fluids in two and three space dimensions. When the initial data is assumed to be radially symmetric and the initial density contains vacuum, we obtain that classical solution, especially the density, will blow up on finite time. The results also reveal that damping can really delay the singularity formation.
基金Under the auspices of the Taishan Scholars Project Special FundsNational Natural Science Fundation of China(No.42077434,42001199)Youth Innovation Technology Project of Higher School in Shandong Province(No.2019RWG016)。
文摘It is an important way to realize rural revitalization and sustainable development to guide rural settlement transition(RST)in an appropriate way.This paper uses actor network theory(ANT)to construct a theoretical framework for the study of RST.Taking two typical villages with different transition paths in rural areas of North China Plain as examples,this paper reveals the mechanism of RST and makes a comparative analysis.The results show that:1)after identifying problems and obligatory passage point,key actors recruit heterogeneous actors into the actor network by entrusting them with common interests,and realize RST under the system operation.2)Rural settlements under different transition paths have similarities in the problems to be solved,collective actions and policy factors,but there are differences in the transition process,mechanism and effect.The actor network and mechanism of RST through the path of new rural community construction are more complex and the transition effect is more thorough.In contrast,the degree of RST of retention development path is limited if there is no resource and location advantage.3)Based on the applicable conditions of different paths,this paper designs a logical framework of‘Situation-Structure-Behavior-Result’to scientifically guide the identification of RST paths under the background of rural revitalization.
基金supported by the National Key Research and Development Program of China(2022YFA1006103,2023YFA1009203)the National Natural Science Foundation of China(61925306,61821004,11831010,61977043,12001320)+2 种基金the Natural Science Foundation of Shandong Province(ZR2019ZD42,ZR2020ZD24)the Taishan Scholars Young Program of Shandong(TSQN202211032)the Young Scholars Program of Shandong University。
文摘This paper considers a linear-quadratic(LQ) meanfield game governed by a forward-backward stochastic system with partial observation and common noise,where a coupling structure enters state equations,cost functionals and observation equations.Firstly,to reduce the complexity of solving the meanfield game,a limiting control problem is introduced.By virtue of the decomposition approach,an admissible control set is proposed.Applying a filter technique and dimensional-expansion technique,a decentralized control strategy and a consistency condition system are derived,and the related solvability is also addressed.Secondly,we discuss an approximate Nash equilibrium property of the decentralized control strategy.Finally,we work out a financial problem with some numerical simulations.
基金supported by National Natural Science Foundation of China[No.41401663]Natural Science Foundation of Shandong Province[No.2010ZRE14029]+1 种基金China Social Science University Humanity Foundation[No.11YJC790283 and No.12YJC790254]Excellent Young Scholars Research Fund of Shandong Normal University
文摘Wetland is one of the most important ecosystems with varied functions and structures,and its loss has been a major issue.Wetland loss in Modem Yellow River Delta(MYRD) becomes a serious environmental problem,so its restoration attracts a great deal of attention from academia and governments.This article proposes a GIS-based multi-criteria comprehensive evaluation methodology for potential estimation of wetland restoration,using MYRD as an example.The model uses four kinds of data(hydrology,terrain,soil,and land use) and could be adapted by planners for use in identifying the suitability of locations as wetland mitigation sites at any site or region.In the application of the model in the MYRD,the research developed a lost wetland distributed map taking the better wetland situation of 1995 as the reference,and elevated the overall distribution trends of wetland restoration potential based on wetland polygon.The results indicated that the total area of wetland loss from 1995 to 2014 was 568.12 km^2,which includes 188.83 km^2 natural wetland and 21.80 km^2 artificial wetland,respectively.The areas of lost wetland with low,middle,and high resilience ability are 126.82 km^2,259.92 km^2,and 119.59 km^2,occupying 25.05%,51.33%,and 23.62%,respectively.The high-restoration-potential wetland included98.47 km^2 of natural wetland and 21.12 km^2 of artificial wetland,which are mainly bush,reed,and ponds.The highrestoration-potential wetland is mainly distributed in the vicinity of Gudong oil field,the Yellow River Delta protected areas,and the eastern sides of Kenli county and Dongying city.
基金funded by Natural Science Foundation of China(71974116)Shandong Natural Science Foundation(2019MG009)Shandong Provincial Social Science Planning Research Project(20CGLJ13).
文摘The rapid development of urbanization has led to a rapid increase in total energy consumption.The proportion of domestic energy consumption to total energy consumption has gradually increased and has become the major driving force for energy consumption.With the pressure from urbanization and domestic energy consumption,it is necessary to study the impact of urbanization on domestic energy consumption of the regional level and to explore the function paths of these two factors.The findings are helpful to realize sustainable development based on the actual situation analysis,horizontal survey data and statistical yearbook panel data.The current situation and changing trends in domestic energy consumption of Shandong Province are systematically examined through field investigation and survey questionnaire.The time-series econometric model is applied to analyze the relationship between urbanization rate and total domestic energy consumption.The research results show that the total domestic energy consumption and urbanization rate of Shandong are generally increasing.The urbanization rate development and domestic energy consumption have a long-term stable and balanced relationship.An increase in urbanization rate can cause an increase in domestic energy consumption.There is a slight difference between the average total energy consumption levels of urban and rural residents,but their energy consumption structures differ a lot.These findings provide basic data support and reference for local governments to formulate energy-conservation and emission-reduction policies.
文摘Based on the Panel Data of Shan dong Province of 17 regions, by estimating varying coefficient models, studies the relationship between financial development and industrial structure.The results show that, on the whole, the financial development indicators-the scale and the efficiency can effectively promote industrial restructuring in all regions of Shandong province, but its role has obvious differences in different regions, so it can provide a basis for economic decision-making and financial policy advice.
基金supposed by Shandong Natural Science Foundation[Grant number:ZR2016GM03]Ministry of Education[Grant number:17YJA790054]
文摘Long-lasting expansion of haze pollution in China has already presented a stern challenge to regional joint prevention and control. There is an urgent need to enlarge and reconstruct the coverage of joint prevention and control of air pollution in key area. Air quality models can identify and quantify the regional contribution of haze pollution and its key components with the help of numerical simulation, but it is difficult to be applied to larger spatial scale due to the complexity of model parameters. The time series analysis can recognize the existence of spatial interaction of haze pollution between cities, but it has not yet been used to further identify the spatial sources of haze pollution in large scale. Using econometric framework of time series analysis, this paper developed a new approach to perform spatial source apportionment. We applied this approach to calculate the contribution from spatial sources of haze pollution in China, using the monitoring data of particulate matter(PM_(2.5)) across 161 Chinese cities. This approach overcame the limitation of numerical simulation that the model complexity increases at excess with the expansion of sample range, and could effectively deal with severe large-scale haze episodes.
基金Supported by Natural Sciences Foundation of China(70973097)
文摘Since rural microfinance is a credit which grants loans without collateral and guarantees to farmers,it is considerably important to evaluate and control the household credit risk.Through establishing the evaluation index system and then using catastrophe progression theory,three common types of catastrophe system and the normalization formula,we get the comprehensive evaluation.Finally,we take the empirical test and the result shows that this method is simpler and more objective which can be used by the credit cooperatives to decide whether to authorize the loans.
基金Supported by Pig Innovation Team Project of Shandong Provincial Modern Agricultural Technology System(SDAIT-06-022-10)
文摘Pig production efficiency and its regional differences in China have strategic importance to the transformation of pig production mode and optimization of pig production layout in China. In this paper,Malmquist-DEA model is adopted to analyze the statistical data; TFP and its decomposition indicators of different pig breeding scale among the top ten pig producing provinces are calculated; both horizontal and longitudinal comparisons are made. Results show that among different pig breeding scales,free-range breeding scale is dominant in Hunan,small breeding scale is dominant in Sichuan,medium breeding scale is dominant in Sichuan and Hunan,and large breeding scale is dominant in Sichuan,Shandong and Jiangsu; among the provinces,pig production efficiency varies with breeding scale,and small-scale pig breeding in Sichuan,Guangdong and Hebei,free-range and medium-scale pig breeding in Hunan,medium-scale pig breeding in Henan and Yunnan,largescale pig breeding in the rest of the provinces,have significant efficiency advantage.
基金sponsored by the National Natural Sciences Foundation Project "Study on the Interaction Mechanism between the Self-Employment of Rural Migrant Labor and Their Transformation into Urban Citizens in the Process of New-Type Urbanization" (Grant No. 71473135)
文摘This paper investigates the gap of demographic urbanization arising from the difference between rural residents who have migrated to cities and those who have acquired urban citizenship in the process of China's urbanization. The skyrocketing house prices and insufficient household consumption power are key factors to the widening gap, which had reached 18% in 2013. In order to explore this issue, by creating the basic model and the model with interaction term, this paper has analyzed the relationship among house prices, consumption power and gap of urbanization using the data of 31 provinces between 1999 and 2013 in China. Empirical result indicates that: there is a positive correlation between the house prices and the gap of China's demographic urbanization. However, such a correlation is restrained by these rural migrants who rent houses in cities. For an increase of house price by 1%, the gap of urbanization will widen by 1.05%. Although rising urban consumption power of rural residents has increased the ratio of migration, the lagged growth of consumption power has led to a widening gap of urbanization. Therefore, the only way to effectively reduce the gap of demographic urbanization is to increase the consumption power of migrant population and optimize consumption structure.
基金National Natural Science Foundation of China(No.41401663)Natural Science Foundation of Shandong Province,China(No.ZR2016EEM18)+1 种基金Science Foundation of Ministry of Education of China(No.12YJC790254)Excellent Young Scholars Research Fund of Shandong Normal University,China
文摘Non-point source （NPS） pollution is the main threat to regional water quality, and the estimation of NPS pollution load has become an important task for NPS pollution control in China. Combined with geographical information system （GIS）, the long. term hydrologic impact assessment （L-THIA） model was used to evaluate the temporal.spatial changes of chemical oxygen demand （COD）, total nitrogen （TN） and total phosphorus （TP） in Nansi Lake basin from 2000 to 2010. The results show： 1 ） the estimated COD, TN and TP loads in 2010 are 260017.5, 111607. 7 and 6372.0 t with the relative errors of 2.1%, 2. 0 % and - 8.8 % respectively, and more than 90% concentrated in the raining period from June to September; 2） cultivated land and construction land take up more than 80% of the whole Nansi Lake basin, and the proportions of the three kinds of NPS pollution loads coming from cultivated land and construction land are more than 98%; 3 ） during 2000- 2010, the COD, TN and TP loads increase by 8801. 6, 180.3 and 71.9 t respectively, and become the main impact factors on the water quality of Nansi Lake.
基金This work was supported by Science and technology project of housing and urban-rural Development Department of Shandong Province(2018)and Shandong Provincial Social Science Planning Research Project(20CGLJ13).
文摘Construction and demolition(C&D)waste has seriously affected the ecological environment.The utilization of C&D waste resources can greatly alleviate this problem,and it is an important way to help achieve the goal of zero carbon in 2050.In this study,insulation concrete blocks were developed with recycled aggregates,cement,fly ash as main raw materials,expanded polystyrene(EPS)insulation boards as block insulation filling material,and selfdeveloped construction waste composite activator,interface enhancer,surface modifier and other additives.Through experimental research and performance test analysis,the best mix ratio of the product and the mechanism of each additive were proved.The experimental results showed that the insulation concrete block prepared under the conditions of recycled aggregates sand ratio of 45%,active activator Na_(2)SO_(4)content of 0.15%and fly ash content of 30%has the best performance and meets the relevant standards.
文摘With the rapid development of the computer technologies, the rapid spread and development of the network resources have a significant impact on people's thinking and lifestyle. The ideological and political education in colleges and universities should keep pace with the times, and examine the new ways and resources of the ideological and political education in colleges and universities from the perspective of the times. The high-tech has been applied to the development of the modem education, expanding the teaching space-time, improving the teaching methods of the ideological and political course, and enriching the teaching contents of the ideological and political theoretical courses. The development mechanism of the ideological and political education resources for college students based on the data mining technology is not only in line with the trend of the times, but can also play an ideal role in optimizing the ideological and political education mechanism for college students.
文摘China is the world＇s most populous country, but also serious ageing country. In the area of social security, was introduced in 2013, ＂the aged with housing＂ and ＂delay＂ of policy measures, also is trying to make the pension ＂dual track＂ unified.
文摘From the date of birth, the fiscal and taxation law in China is always rooted in Chinese land, Chinese resources and aimed at solving Chinese problem.As a famous scholar on the fiscal and taxation law professor Jianwen liu once said： ＂the fiscal and taxation law is a very important law, it not only involves the entire country macro economic operation but also involves the interests of families and everyone＇s interests.＂This article will combine professor Jianwen Liu＇ s research results in the past two years, from the view of the field of law to discuss why the fiscal and taxation law known as public property.
文摘With the new curriculum reform put into effect, new requirements and plans for college English teaching have been put forward. More and more attention has been paid to Chinese college English teaching from all aspects, among which, psycholinguistics is a new frontier subject. The application of psycholinguistic principles in education is more extensive. The research on the osmotic application of psycholinguistic principles in Chinese college English teaching is becoming the focus of education. This paper briefly introduces the characteristics and basic situation of English teaching in Chinese colleges, and the application of psycholinguistic principles in Chinese college English teaching is expounded. The purpose of this study is to understand the principles of psycholinguistics in English teaching in Chinese universities. It is hoped to play a positive role in promoting college English teaching innovation in China.
文摘So many legal issues can be handled in public interest method. As some commentators have pointed out, the public interest is an ancient and new topic. It＇s a highly abstract prone to ambiguities and shortcomings of the concept. And it＇s also a basket that strange, confused and can not be discarded. Even critics simply deny the existence of public interest and regard the public interest as a myth. As it＇s difficult to define the public interest from political perspective, a democratic theory, legal perspective a theory of law, economic perspective a public choice theory, philosophical perspective a public philosophy, and other common perspective. The paper explores the law theory of public interest from the framework of the overflow theory and the perspective of the concept function, and provides an easy to use identification method of public interest for the judicial practice and administrative practices.
文摘In recent years, more and more people choose to become civil servants for stability of the work and respect of the society. Civil servants not only have a better treatment, but also a higher social status. However, the condition is not true in England. This thesis will demonstrate the current condition of ＂Government Office Worker Craze＂, meanwhile, analyze the reasons of this phenomenon by comparing with England. The thesis will firstly display the advantages and disadvantages of this phenomenon; then demonstrate traditional understanding of the two countries separately to find out common characters; the reason of ＂Government Office Worker Craze ＂ in China by exploring the historical cultures; finally, the thesis shows intersections between the two countries and give proper suggestions.
文摘In China, major shareholders of private listed enterprise could control its production and operation by virtue of few resources which makes it possible for ultimate controlling shareholders to expropriate minority shareholders＇ rights and interests.In this paper, we studied the relationship between ultimate controlling shareholders and business performance of private enterprises based on the theory of ultimate controlling shareholders and made relevant conclusions and recommendations.
