Based on the theory of coordinating action of building ground, foundation and structure, this paper presents a modified method for calculating additional stresses on buildings in mining areas by considering the joint ...Based on the theory of coordinating action of building ground, foundation and structure, this paper presents a modified method for calculating additional stresses on buildings in mining areas by considering the joint effect of cur- vature deformation and horizontal deformation on buildings. It points out that for buildings over the coal pillar, it is ad- visable to soften the intermediate ground of buildings when they are affected by mining. For buildings over the goaf, it is preferable to soften the ground at both ends of buildings. In order to enhance the ability of a building to resist tensile deformation, the key measure is to reinforce the bottom foundation of the building. In addition, the concept of “angle of break of building” is proposed. It is because of this angle that the protecting coal pillar is left, which is a better solution than prevailing solutions The findings provide a more scientific basis for mining under buildings.展开更多
A new intelligent control method for welding positioner is proposed. Applying an improved fuzzy controller and a variable PID controller, a two-mode intelligent coordinating controller ( TMICC ) is designed on basis o...A new intelligent control method for welding positioner is proposed. Applying an improved fuzzy controller and a variable PID controller, a two-mode intelligent coordinating controller ( TMICC ) is designed on basis of fuzzy logic and rules. The simulation and experimental results show that this control system can obtain better dynamic and static characteristics.展开更多
The tropic region of Yunnan is a treasurable land with rich resources and great development potentials. The natural environment and resources of the region are characterized by a complicated topography, great height d...The tropic region of Yunnan is a treasurable land with rich resources and great development potentials. The natural environment and resources of the region are characterized by a complicated topography, great height deviation, monsoon climate as well as abound biological resources. Therefore, the tropic region becomes an ideal place for developing agricultural production base, though it do exist such problems as adverse location, sparsely distributed land resources, poor traffic conditions and deterioration of ecological environment. In order to further exploit the tropical resources and to implement comprehensive harnessing, we should take the following countermeasures:Working out a comprehensive development planning; restoring ecological environment,establishing agricultural production base; tapping fully water resources; constructing the traffic line and developing the border ports and tourism spots.展开更多
In order to overcome the drawbacks of conventional artificial potential fields (APF) based methods for the motion planning problems of mobile robots in dynamic uncertain environments, an artificial coordinating fields...In order to overcome the drawbacks of conventional artificial potential fields (APF) based methods for the motion planning problems of mobile robots in dynamic uncertain environments, an artificial coordinating fields (ACF) based method has been proposed recently. This paper deals with the reachability problem of the ACF, that is, how to design and choose the parameters of the ACF and how the environment should be such that the robot can reach its goal without being trapped in local minima. Some sufficient conditions for these purposes are developed theoretically. Theoretical analyses show that, the ACF can effectively remove local minima in dynamic uncertain environments with V-shape or U-shape obstacles, and guide the mobile robot to reach its goal with some necessary environment constraints and based on the methods provided in this paper to properly choose the parameters of the ACF. Comparisons between the ACF and APF, and simulations are provided to illustrate the advantages of the ACF.展开更多
This paper studies the problem of coordinated motion generation for a group of rigid bodies. Two classes of coordinated motion primitives, relative equilibria and ma- neuvers, are given as building blocks for generati...This paper studies the problem of coordinated motion generation for a group of rigid bodies. Two classes of coordinated motion primitives, relative equilibria and ma- neuvers, are given as building blocks for generating coordi- nated motions. In a motion-primitive based planning frame- work, a control method is proposed for the robust execution of a coordinated motion plan in the presence of perturba- tions. The control method combines the relative equilibria stabilization with maneuver design, and results in a close- loop motion planning framework. The performance of the control method has been illustrated through a numerical sim- ulation.展开更多
The coordinating control system is popular used in power plant.This paper describes the advanced coordinating control by control methods and optimal operation,introduces their principals and features by using the exam...The coordinating control system is popular used in power plant.This paper describes the advanced coordinating control by control methods and optimal operation,introduces their principals and features by using the examples of power plant op- eration.It is wealthy for automation application in optimal power plant operation.展开更多
A sliding mode variable structure control (SMVSC) based on a coordinating optimization algorithm has been developed. Steady state error and control switching frequency are used to constitute the system performance i...A sliding mode variable structure control (SMVSC) based on a coordinating optimization algorithm has been developed. Steady state error and control switching frequency are used to constitute the system performance indexes in the coordinating optimization, while the tuning rate of boundary layer width (BLW) is employed as the optimization parameter. Based on the mathematical relationship between the BLW and steady-state error, an optimized BLW tuning rate is added to the nonlinear control term of SMVSC. Simulation experiment results applied to the positioning control of an electro-hydraulic servo system show the comprehensive superiority in dynamical and static state performance by using the proposed controller is better than that by using SMVSC without optimized BLW tuning rate. This succeeds in coordinately considering both chattering reduction and high-precision control realization in SMVSC.展开更多
In order to implement the spirit of the Sixteenth National People's Congress to accelerate development of rural education, deepen reform of rural education, guarantee a well-off society, and harmonize rural and urban...In order to implement the spirit of the Sixteenth National People's Congress to accelerate development of rural education, deepen reform of rural education, guarantee a well-off society, and harmonize rural and urban development, coordinating ruralurban education is the key to China's development. At present, the rural-urban coordinating education is influenced by many factors, including rural-urban income difference, rural-urban educational resources difference, rural-urban background difference, and rural- urban institutional difference. In order to realize the coordinating development of rural-urban education, we need innovation in "Hukou" institution, land institution, financial institution and rural education institution. Institution innovation would be the guarantee to the coordinating rural-urban education.展开更多
New thermotropic chloro-bridged dinuclear palladium coordinating imine side chain liquid crystalline polysiloxanes have been synthesized. Their mesomorphic properties have been investigated by DSC, X-ray diffraction a...New thermotropic chloro-bridged dinuclear palladium coordinating imine side chain liquid crystalline polysiloxanes have been synthesized. Their mesomorphic properties have been investigated by DSC, X-ray diffraction and polarizing microscopy. The polymeric complexes show nematicdiscotic (Nd) mesophase. It is found that the temperature range of liquid crystalline state of chloro- bridged polymeric complexes is much wider than that of acetato- bridged ones and imine side chain polysiloxane. This indicates that the disc-like chloro-bridged palladium complexing units play a role as mesogen in mesophase.展开更多
In May 2011, the Prison Management Bureau of Sichuan Province in Southwest China held a conference in its capital city Chengdu to discuss the management of severely sick prisoners. Coordinating Management on Major Dis...In May 2011, the Prison Management Bureau of Sichuan Province in Southwest China held a conference in its capital city Chengdu to discuss the management of severely sick prisoners. Coordinating Management on Major Diseases of Sick Prisoners in Sichuan (Trial) was issued then, marking the start of an overall deployment.展开更多
A multi-objective intelligent coordinating optimization strategy based on qualitative and quantitative synthetic model for Pb-Zn sintering blending process was proposed to obtain optimal mixture ratio. The mechanism a...A multi-objective intelligent coordinating optimization strategy based on qualitative and quantitative synthetic model for Pb-Zn sintering blending process was proposed to obtain optimal mixture ratio. The mechanism and neural network quantitative models for predicting compositions and rule models for expert reasoning were constructed based on statistical data and empirical knowledge. An expert reasoning method based on these models were proposed to solve blending optimization problem, including multi-objective optimization for the first blending process and area optimization for the second blending process, and to determine optimal mixture ratio which will meet the requirement of intelligent coordination. The results show that the qualified rates of agglomerate Pb, Zn and S compositions are increased by 7.1%, 6.5% and 6.9%, respectively, and the fluctuation of sintering permeability is reduced by 7.0%, which effectively stabilizes the agglomerate compositions and the permeability.展开更多
Coordinating regional development is a key step for China to achieve the goal of common prosperity for all. From the era of the planned economy to the development,consolidation and improvement of the socialist market ...Coordinating regional development is a key step for China to achieve the goal of common prosperity for all. From the era of the planned economy to the development,consolidation and improvement of the socialist market economic system after reform and opening up since 1978, as a key target of economic development, China has been committed to balancing regional development, and after decades-long explorations and relentless efforts made great progress. Coordinated regional development-as manifested in narrowed regional development gaps, more equal access to basic public services and eradication of regional absolute poverty-has paved the way for more substantive progress to be made in delivering common prosperity for all. Despite the progress, China still needs to further improve institutional systems for regional coordination and undergird the regional foundation for common prosperity according to the requirements of its new development stage. Specifically, China should focus on the following priorities:(i) Strengthen institutional infrastructure, smooth regional internal and external circulations, and develop a unified domestic market at a higher level;(ii) give full play to the role of the government in equalizing access to basic public services, promoting infrastructure connectivity and protecting basic living standards;(iii) optimize integrated urban-rural development mechanisms, take solid steps to revitalize the countryside, and further coordinate urban and rural development;(iv) improve the layout of the industrial chain and advance interregional industrial chain upgrade and social progress.展开更多
The thesis researches urban-rural coordination which is incorporated into the framework of "agriculture,rural areas and farmers",and it focuses on farmers' human resources development,agricultural indust...The thesis researches urban-rural coordination which is incorporated into the framework of "agriculture,rural areas and farmers",and it focuses on farmers' human resources development,agricultural industrial adjustment,rural regional coordinated development and so on.The main problems existing in the process of coordinating urban-rural development of Chongqing City are discussed under the foregoing framework.We find that input and flow direction of capital deviating from "agriculture,rural areas and farmers" is the direct cause of insufficient rural educational input,insufficient agricultural input,and irrational rural input,while the fundamental reason lies in the irrational financial policy.Based on this,the measures of innovating upon financial policy and financial system are put forward.展开更多
Faced with economic recession,firms struggle to find ways to stay competitive and maintain market share.Effective coordination of the supply chain can solve this problem,but this may fail if existing capital constrain...Faced with economic recession,firms struggle to find ways to stay competitive and maintain market share.Effective coordination of the supply chain can solve this problem,but this may fail if existing capital constraints and financial flows are ignored.This study addresses the challenge by exploiting coordination through joint decision-making on the physical and financial flows of a capital-constrained supply chain.We also consider the capital-constrained member’s financing limitations that lead to lost sales.Two scenarios based on non-coordinated and coordinated structures are modeled in the form of bi-objective optimization problems that simultaneously optimize system costs and service levels.The models are solved using the-constraint method.The results indicate that the non-coordinated model cannot satisfy more than about 50%of the demand due to capital shortage and financing limitations,while the coordinated model can satisfy all of the demand via internal financing.Furthermore,the proposed coordination scheme leads to cost reduction for the members and the total system.To motivate all members to accept the proposed coordination scheme,a cost-sharing mechanism is applied to the coordination procedure.Finally,a sensitivity analysis concerning financial parameters is provided for validating the coordination model.展开更多
Due to the phenomenon of abandoning wind power and photo voltage(PV)power in the“Three Northern Areas”in China,this paper presents an optimal strategy for coordinating and dispatching“source-load”in power system b...Due to the phenomenon of abandoning wind power and photo voltage(PV)power in the“Three Northern Areas”in China,this paper presents an optimal strategy for coordinating and dispatching“source-load”in power system based on multiple time scales.On the basis of the analysis of the uncertainty of wind power and PV power as well as the characteristics of load side resource dispatching,the optimal model of coordinating and dispatching“source-load”in power system based on multiple time scales is established.It can simultaneously and effectively dispatch conventional generators,wind plant,PV power station,pumped-storage power station and load side resources by optimally using three time scales:day-ahead,intra-day and real-time.According to the latest predicted information of wind power,PV power and load,the original generation schedule can be rolled and amended by using the corresponding time scale.The effectiveness of the model can be verified by a real system.The simulation results show that the proposed model can make full use of“source-load”resources to improve the ability to consume wind power and PV power of the grid-connected system.展开更多
It has been well identified that the extreme events significantly impact the system operation. In this work, a comprehensive operating strategy, which coordinates the preventive strategies and system restoration, was ...It has been well identified that the extreme events significantly impact the system operation. In this work, a comprehensive operating strategy, which coordinates the preventive strategies and system restoration, was proposed. A re-dispatch model that limits the potential loss under extreme events, as well as provides adequate resources for system restoration after the extreme events, was proposed. An optimal power flow based method was established to solve the proposed model. The availabilities of components and the remaining system due to the extreme events were restored by extending the EPRI’s System Restoration Navigator (SRN) with a little modification. Case studies demonstrate the proposed model and methods.展开更多
Manufacturing equipment takes the task of operation and directly effects on the manufacturing process. One single Key Performance Indicator (KPI) is mainly employed to evaluate equipment in most studies, neither int...Manufacturing equipment takes the task of operation and directly effects on the manufacturing process. One single Key Performance Indicator (KPI) is mainly employed to evaluate equipment in most studies, neither integrating the KPIs into a completed evaluation system nor considering the impact and conflict among KPIs. In this paper, a KPI evaluation architecture is presented to define and analyze KPIs, and then a common structure for KPI to obtain the KPI set of manufacturing equipment is introduced. An available multi-KPl coordination model is proposed to discern and balance the relationship among multi-KPl. Finally, a case study is introduced to illustrate the applicability of the coordination model by using multi-objective optimization strategy and an efficient solution is obtained.展开更多
By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and ...By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and possibility of coordinating public goods supply in urban and rural areas. The model assumes that the population size of urban and rural areas is different,and the population can not flow freely between urban and rural areas; there are different degrees of spillover in the public goods supply. Model results show that coordinating public goods supply in urban and rural areas is the result of optimizing resource allocation efficiency,but the residents' individual utility level will not necessarily improve,so residents' willingness to support coordinated urban-rural supply is different,and public goods spillover and different tax systems are the factors that affect the residents' utility level. Finally,this paper uses the practice of coordinating urban and rural compulsory education in Chengdu City to confirm the above conclusions.展开更多
To establish the institutional mechanism for land conflict coordination in China, a case-based reasomng system is developed as an intelligent support and effective manner to resolve such issues. The establishment of t...To establish the institutional mechanism for land conflict coordination in China, a case-based reasomng system is developed as an intelligent support and effective manner to resolve such issues. The establishment of the case library is discussed, previous land conflict cases are archived in a structural representation format for retrieval, and the similarity algorithm is adopted to compare the case features. Group tests show a good classification performance, which reveals that the system is feasible.展开更多
Based on principal component analysis, coordinated development model and location entropy, this paper analyzes the coordinated development of regional scientific and technological innovation ability and industrial agg...Based on principal component analysis, coordinated development model and location entropy, this paper analyzes the coordinated development of regional scientific and technological innovation ability and industrial agglomeration level and the spatial differences in Yangtze River economic zone. Firstly, the regional science and technology innovation ability is divided into two parts: innovation input and innovation transformation result. The accumulation of knowledge outside the region is introduced as a variable influencing the correlation effect, and the index system of regional innovation capability is constructed. According to the degree of coordination between the regional technological innovation ability and the level of industrial agglomeration, the Yangtze River economic belt provinces and municipalities are divided into moderate disorder class, serious disorder class, extreme disorder class, middle and lower reaches of the Yangtze River region interregional knowledge accumulation weak.展开更多
基金Project 50474064 supported by the National Natural Science Foundation of China
文摘Based on the theory of coordinating action of building ground, foundation and structure, this paper presents a modified method for calculating additional stresses on buildings in mining areas by considering the joint effect of cur- vature deformation and horizontal deformation on buildings. It points out that for buildings over the coal pillar, it is ad- visable to soften the intermediate ground of buildings when they are affected by mining. For buildings over the goaf, it is preferable to soften the ground at both ends of buildings. In order to enhance the ability of a building to resist tensile deformation, the key measure is to reinforce the bottom foundation of the building. In addition, the concept of “angle of break of building” is proposed. It is because of this angle that the protecting coal pillar is left, which is a better solution than prevailing solutions The findings provide a more scientific basis for mining under buildings.
文摘A new intelligent control method for welding positioner is proposed. Applying an improved fuzzy controller and a variable PID controller, a two-mode intelligent coordinating controller ( TMICC ) is designed on basis of fuzzy logic and rules. The simulation and experimental results show that this control system can obtain better dynamic and static characteristics.
文摘The tropic region of Yunnan is a treasurable land with rich resources and great development potentials. The natural environment and resources of the region are characterized by a complicated topography, great height deviation, monsoon climate as well as abound biological resources. Therefore, the tropic region becomes an ideal place for developing agricultural production base, though it do exist such problems as adverse location, sparsely distributed land resources, poor traffic conditions and deterioration of ecological environment. In order to further exploit the tropical resources and to implement comprehensive harnessing, we should take the following countermeasures:Working out a comprehensive development planning; restoring ecological environment,establishing agricultural production base; tapping fully water resources; constructing the traffic line and developing the border ports and tourism spots.
基金This paper was partly supported by the National Natural Science Foundation (No.60131160741,60334010) of China.
文摘In order to overcome the drawbacks of conventional artificial potential fields (APF) based methods for the motion planning problems of mobile robots in dynamic uncertain environments, an artificial coordinating fields (ACF) based method has been proposed recently. This paper deals with the reachability problem of the ACF, that is, how to design and choose the parameters of the ACF and how the environment should be such that the robot can reach its goal without being trapped in local minima. Some sufficient conditions for these purposes are developed theoretically. Theoretical analyses show that, the ACF can effectively remove local minima in dynamic uncertain environments with V-shape or U-shape obstacles, and guide the mobile robot to reach its goal with some necessary environment constraints and based on the methods provided in this paper to properly choose the parameters of the ACF. Comparisons between the ACF and APF, and simulations are provided to illustrate the advantages of the ACF.
基金supported by the National Natural Science Foundation of China (11072002,10832006)
文摘This paper studies the problem of coordinated motion generation for a group of rigid bodies. Two classes of coordinated motion primitives, relative equilibria and ma- neuvers, are given as building blocks for generating coordi- nated motions. In a motion-primitive based planning frame- work, a control method is proposed for the robust execution of a coordinated motion plan in the presence of perturba- tions. The control method combines the relative equilibria stabilization with maneuver design, and results in a close- loop motion planning framework. The performance of the control method has been illustrated through a numerical sim- ulation.
文摘The coordinating control system is popular used in power plant.This paper describes the advanced coordinating control by control methods and optimal operation,introduces their principals and features by using the examples of power plant op- eration.It is wealthy for automation application in optimal power plant operation.
基金This work was supported by the Provincial Natural Science Foundation of Hunan(No.04JJ6033) the Research Foundation of Hunan Education Bureau (No.03C066).
文摘A sliding mode variable structure control (SMVSC) based on a coordinating optimization algorithm has been developed. Steady state error and control switching frequency are used to constitute the system performance indexes in the coordinating optimization, while the tuning rate of boundary layer width (BLW) is employed as the optimization parameter. Based on the mathematical relationship between the BLW and steady-state error, an optimized BLW tuning rate is added to the nonlinear control term of SMVSC. Simulation experiment results applied to the positioning control of an electro-hydraulic servo system show the comprehensive superiority in dynamical and static state performance by using the proposed controller is better than that by using SMVSC without optimized BLW tuning rate. This succeeds in coordinately considering both chattering reduction and high-precision control realization in SMVSC.
文摘In order to implement the spirit of the Sixteenth National People's Congress to accelerate development of rural education, deepen reform of rural education, guarantee a well-off society, and harmonize rural and urban development, coordinating ruralurban education is the key to China's development. At present, the rural-urban coordinating education is influenced by many factors, including rural-urban income difference, rural-urban educational resources difference, rural-urban background difference, and rural- urban institutional difference. In order to realize the coordinating development of rural-urban education, we need innovation in "Hukou" institution, land institution, financial institution and rural education institution. Institution innovation would be the guarantee to the coordinating rural-urban education.
文摘New thermotropic chloro-bridged dinuclear palladium coordinating imine side chain liquid crystalline polysiloxanes have been synthesized. Their mesomorphic properties have been investigated by DSC, X-ray diffraction and polarizing microscopy. The polymeric complexes show nematicdiscotic (Nd) mesophase. It is found that the temperature range of liquid crystalline state of chloro- bridged polymeric complexes is much wider than that of acetato- bridged ones and imine side chain polysiloxane. This indicates that the disc-like chloro-bridged palladium complexing units play a role as mesogen in mesophase.
文摘In May 2011, the Prison Management Bureau of Sichuan Province in Southwest China held a conference in its capital city Chengdu to discuss the management of severely sick prisoners. Coordinating Management on Major Diseases of Sick Prisoners in Sichuan (Trial) was issued then, marking the start of an overall deployment.
基金Project(2002CB312203) supported by the National Key Fundamental Research and Development Programof China pro-ject(60574030) supported bythe National Natural Science Foundation of China project(06FD026) supported bythe Natural Science Foun-dation of Hunan Province , China
文摘A multi-objective intelligent coordinating optimization strategy based on qualitative and quantitative synthetic model for Pb-Zn sintering blending process was proposed to obtain optimal mixture ratio. The mechanism and neural network quantitative models for predicting compositions and rule models for expert reasoning were constructed based on statistical data and empirical knowledge. An expert reasoning method based on these models were proposed to solve blending optimization problem, including multi-objective optimization for the first blending process and area optimization for the second blending process, and to determine optimal mixture ratio which will meet the requirement of intelligent coordination. The results show that the qualified rates of agglomerate Pb, Zn and S compositions are increased by 7.1%, 6.5% and 6.9%, respectively, and the fluctuation of sintering permeability is reduced by 7.0%, which effectively stabilizes the agglomerate compositions and the permeability.
文摘Coordinating regional development is a key step for China to achieve the goal of common prosperity for all. From the era of the planned economy to the development,consolidation and improvement of the socialist market economic system after reform and opening up since 1978, as a key target of economic development, China has been committed to balancing regional development, and after decades-long explorations and relentless efforts made great progress. Coordinated regional development-as manifested in narrowed regional development gaps, more equal access to basic public services and eradication of regional absolute poverty-has paved the way for more substantive progress to be made in delivering common prosperity for all. Despite the progress, China still needs to further improve institutional systems for regional coordination and undergird the regional foundation for common prosperity according to the requirements of its new development stage. Specifically, China should focus on the following priorities:(i) Strengthen institutional infrastructure, smooth regional internal and external circulations, and develop a unified domestic market at a higher level;(ii) give full play to the role of the government in equalizing access to basic public services, promoting infrastructure connectivity and protecting basic living standards;(iii) optimize integrated urban-rural development mechanisms, take solid steps to revitalize the countryside, and further coordinate urban and rural development;(iv) improve the layout of the industrial chain and advance interregional industrial chain upgrade and social progress.
文摘The thesis researches urban-rural coordination which is incorporated into the framework of "agriculture,rural areas and farmers",and it focuses on farmers' human resources development,agricultural industrial adjustment,rural regional coordinated development and so on.The main problems existing in the process of coordinating urban-rural development of Chongqing City are discussed under the foregoing framework.We find that input and flow direction of capital deviating from "agriculture,rural areas and farmers" is the direct cause of insufficient rural educational input,insufficient agricultural input,and irrational rural input,while the fundamental reason lies in the irrational financial policy.Based on this,the measures of innovating upon financial policy and financial system are put forward.
文摘Faced with economic recession,firms struggle to find ways to stay competitive and maintain market share.Effective coordination of the supply chain can solve this problem,but this may fail if existing capital constraints and financial flows are ignored.This study addresses the challenge by exploiting coordination through joint decision-making on the physical and financial flows of a capital-constrained supply chain.We also consider the capital-constrained member’s financing limitations that lead to lost sales.Two scenarios based on non-coordinated and coordinated structures are modeled in the form of bi-objective optimization problems that simultaneously optimize system costs and service levels.The models are solved using the-constraint method.The results indicate that the non-coordinated model cannot satisfy more than about 50%of the demand due to capital shortage and financing limitations,while the coordinated model can satisfy all of the demand via internal financing.Furthermore,the proposed coordination scheme leads to cost reduction for the members and the total system.To motivate all members to accept the proposed coordination scheme,a cost-sharing mechanism is applied to the coordination procedure.Finally,a sensitivity analysis concerning financial parameters is provided for validating the coordination model.
基金Major Projects of Gansu Province(No.17ZD2GA010)Power Company Technology Projects of State Grid Corporation in Gansu Province(No.52272716000K)
文摘Due to the phenomenon of abandoning wind power and photo voltage(PV)power in the“Three Northern Areas”in China,this paper presents an optimal strategy for coordinating and dispatching“source-load”in power system based on multiple time scales.On the basis of the analysis of the uncertainty of wind power and PV power as well as the characteristics of load side resource dispatching,the optimal model of coordinating and dispatching“source-load”in power system based on multiple time scales is established.It can simultaneously and effectively dispatch conventional generators,wind plant,PV power station,pumped-storage power station and load side resources by optimally using three time scales:day-ahead,intra-day and real-time.According to the latest predicted information of wind power,PV power and load,the original generation schedule can be rolled and amended by using the corresponding time scale.The effectiveness of the model can be verified by a real system.The simulation results show that the proposed model can make full use of“source-load”resources to improve the ability to consume wind power and PV power of the grid-connected system.
文摘It has been well identified that the extreme events significantly impact the system operation. In this work, a comprehensive operating strategy, which coordinates the preventive strategies and system restoration, was proposed. A re-dispatch model that limits the potential loss under extreme events, as well as provides adequate resources for system restoration after the extreme events, was proposed. An optimal power flow based method was established to solve the proposed model. The availabilities of components and the remaining system due to the extreme events were restored by extending the EPRI’s System Restoration Navigator (SRN) with a little modification. Case studies demonstrate the proposed model and methods.
基金Supported by the National Natural Science Foundation of China(61134007,61320106009)
文摘Manufacturing equipment takes the task of operation and directly effects on the manufacturing process. One single Key Performance Indicator (KPI) is mainly employed to evaluate equipment in most studies, neither integrating the KPIs into a completed evaluation system nor considering the impact and conflict among KPIs. In this paper, a KPI evaluation architecture is presented to define and analyze KPIs, and then a common structure for KPI to obtain the KPI set of manufacturing equipment is introduced. An available multi-KPl coordination model is proposed to discern and balance the relationship among multi-KPl. Finally, a case study is introduced to illustrate the applicability of the coordination model by using multi-objective optimization strategy and an efficient solution is obtained.
基金Supported by Fundamental Research Funds for Central Universities,Southwest University(SWU1109028)Southwest University Youth Foundation(SWU07104)Key Humanities and Social Sciences Research Project in Chongqing City(13SKB022)
文摘By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and possibility of coordinating public goods supply in urban and rural areas. The model assumes that the population size of urban and rural areas is different,and the population can not flow freely between urban and rural areas; there are different degrees of spillover in the public goods supply. Model results show that coordinating public goods supply in urban and rural areas is the result of optimizing resource allocation efficiency,but the residents' individual utility level will not necessarily improve,so residents' willingness to support coordinated urban-rural supply is different,and public goods spillover and different tax systems are the factors that affect the residents' utility level. Finally,this paper uses the practice of coordinating urban and rural compulsory education in Chengdu City to confirm the above conclusions.
基金The National Natural Science Foundationof China (No70573036)
文摘To establish the institutional mechanism for land conflict coordination in China, a case-based reasomng system is developed as an intelligent support and effective manner to resolve such issues. The establishment of the case library is discussed, previous land conflict cases are archived in a structural representation format for retrieval, and the similarity algorithm is adopted to compare the case features. Group tests show a good classification performance, which reveals that the system is feasible.
文摘Based on principal component analysis, coordinated development model and location entropy, this paper analyzes the coordinated development of regional scientific and technological innovation ability and industrial agglomeration level and the spatial differences in Yangtze River economic zone. Firstly, the regional science and technology innovation ability is divided into two parts: innovation input and innovation transformation result. The accumulation of knowledge outside the region is introduced as a variable influencing the correlation effect, and the index system of regional innovation capability is constructed. According to the degree of coordination between the regional technological innovation ability and the level of industrial agglomeration, the Yangtze River economic belt provinces and municipalities are divided into moderate disorder class, serious disorder class, extreme disorder class, middle and lower reaches of the Yangtze River region interregional knowledge accumulation weak.