期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
对高速公路标志设置的探讨 被引量:2
1
作者 过秀成 郭敏 《华东公路》 北大核心 1996年第4期24-25,共2页
在高速公路标志设置之前应先确定设置的范围,根据对标志设置的各项原则进行规划,然后对设置的具体位置进行标定并对其工作性能进行测试。本文就这几方面的问题作了粗浅的探讨。
关键词 标志设置 规划标定 性能测试 高速公路 交通标志
下载PDF
Prediction Model of Data Envelopment Analysis with Undesirable Outputs 被引量:2
2
作者 边馥萍 范宇 《Transactions of Tianjin University》 EI CAS 2004年第1期34-38,共5页
Data envelopment analysis (DEA) has become a standard non parametric approach to productivity analysis, especially to relative efficiency analysis of decision making units (DMUs). Extended to the prediction field, it ... Data envelopment analysis (DEA) has become a standard non parametric approach to productivity analysis, especially to relative efficiency analysis of decision making units (DMUs). Extended to the prediction field, it can solve the prediction problem with multiple inputs and outputs which can not be solved easily by the regression analysis method.But the traditional DEA models can not solve the problem with undesirable outputs,so in this paper the inherent relationship between goal programming and the DEA method based on the relationship between multiple goal programming and goal programming is explored,and a mixed DEA model which can make all factors of inputs and undesirable outputs decrease in different proportions is built.And at the same time,all the factors of desirable outputs increase in different proportions. 展开更多
关键词 data envelopment analysis(DEA) undesirable outputs multiple goal programming mixed DEA model PREDICTION
下载PDF
Multi-objective planning model for simultaneous reconfiguration of power distribution network and allocation of renewable energy resources and capacitors with considering uncertainties 被引量:9
3
作者 Sajad Najafi Ravadanegh Mohammad Reza Jannati Oskuee Masoumeh Karimi 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第8期1837-1849,共13页
This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously a... This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously and to improve power system's accountability and system performance parameters. Due to finding solution which is closer to realistic characteristics, load forecasting, market price errors and the uncertainties related to the variable output power of wind based DG units are put in consideration. This work employs NSGA-II accompanied by the fuzzy set theory to solve the aforementioned multi-objective problem. The proposed scheme finally leads to a solution with a minimum voltage deviation, a maximum voltage stability, lower amount of pollutant and lower cost. The cost includes the installation costs of new equipment, reconfiguration costs, power loss cost, reliability cost, cost of energy purchased from power market, upgrade costs of lines and operation and maintenance costs of DGs. Therefore, the proposed methodology improves power quality, reliability and security in lower costs besides its preserve, with the operational indices of power distribution networks in acceptable level. To validate the proposed methodology's usefulness, it was applied on the IEEE 33-bus distribution system then the outcomes were compared with initial configuration. 展开更多
关键词 optimal reconfiguration renewable energy resources sitting and sizing capacitor allocation electric distribution system uncertainty modeling scenario based-stochastic programming multi-objective genetic algorithm
下载PDF
A multi-objective model for cordon-based congestion pricing schemes with nonlinear distance tolls 被引量:1
4
作者 孙鑫 刘志远 +3 位作者 THOMPSON Russell G 别一鸣 翁金贤 陈淑燕 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第5期1273-1282,共10页
Congestion pricing is an important component of urban intelligent transport system.The efficiency,equity and the environmental impacts associated with road pricing schemes are key issues that should be considered befo... Congestion pricing is an important component of urban intelligent transport system.The efficiency,equity and the environmental impacts associated with road pricing schemes are key issues that should be considered before such schemes are implemented.This paper focuses on the cordon-based pricing with distance tolls,where the tolls are determined by a nonlinear function of a vehicles' travel distance within a cordon,termed as toll charge function.The optimal tolls can give rise to:1) higher total social benefits,2) better levels of equity,and 3) reduced environmental impacts(e.g.,less emission).Firstly,a deterministic equilibrium(DUE) model with elastic demand is presented to evaluate any given toll charge function.The distance tolls are non-additive,thus a modified path-based gradient projection algorithm is developed to solve the DUE model.Then,to quantitatively measure the equity level of each toll charge function,the Gini coefficient is adopted to measure the equity level of the flows in the entire transport network based on equilibrium flows.The total emission level is used to reflect the impacts of distance tolls on the environment.With these two indexes/measurements for the efficiency,equity and environmental issues as well as the DUE model,a multi-objective bi-level programming model is then developed to determine optimal distance tolls.The multi-objective model is converted to a single level model using the goal programming.A genetic algorithm(GA) is adopted to determine solutions.Finally,a numerical example is presented to verify the methodology. 展开更多
关键词 distance-based toll charging schemes EQUITY path-based gradient projection algorithm non-additive goal programming
下载PDF
融合自主导航信息的分布式测量网络组网方法 被引量:4
5
作者 曹瀚文 杨凌辉 林嘉睿 《激光与光电子学进展》 CSCD 北大核心 2020年第15期85-91,共7页
基于光电扫描原理的分布式测量网络是一种大尺寸三维坐标测量系统,广泛应用于工业制造和装配领域。但测量网络体系庞大、测量环境复杂,增加了组网定向工作的难度,且任意节点的变动都需要重新进行组网。现有的组网定向方法过于依赖人工... 基于光电扫描原理的分布式测量网络是一种大尺寸三维坐标测量系统,广泛应用于工业制造和装配领域。但测量网络体系庞大、测量环境复杂,增加了组网定向工作的难度,且任意节点的变动都需要重新进行组网。现有的组网定向方法过于依赖人工介入和主观估计,因此提出了一种基于自主建图、全局定位和自动导航的分布式测量网络自动组网定向方法和标定点位规划策略。实验结果表明,该组网方法在保证测量精度的前提下,提高了组网效率和自动化水平,可实现测量系统自动维护和工业现场自动化。 展开更多
关键词 计量仪器 工作空间测量定位系统 光电扫描 组网定向 自动引导车 标定规划
原文传递
Optimality Conditions and Duality for Nondifferentiable Multiobjective Semi-Infinite Programming Problems with Generalized(C,α,ρ,d)-Convexity 被引量:6
6
作者 MISHRA Shashi Kant JAISWAL Monika HOAI AN Le Thi 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2015年第1期47-59,共13页
This paper obtains sufficient optimality conditions for a nonlinear nondifferentiable multiobjective semi-infinite programming problem involving generalized(C,α,ρ,d)-convex functions.The authors formulate Mond-Weir-... This paper obtains sufficient optimality conditions for a nonlinear nondifferentiable multiobjective semi-infinite programming problem involving generalized(C,α,ρ,d)-convex functions.The authors formulate Mond-Weir-type dual model for the nonlinear nondifferentiable multiobjective semiinfinite programming problem and establish weak,strong and strict converse duality theorems relating the primal and the dual problems. 展开更多
关键词 DUALITY generalized convexity optimality conditions semi-infinite programming.
原文传递
Higher-order Mond-Weir converse duality in multiobjective programming involving cones 被引量:1
7
作者 YANG XinMin YANG Jin +1 位作者 YIP Tsz Leung TEO Kok Lay 《Science China Mathematics》 SCIE 2013年第11期2389-2392,共4页
In this work, we established a converse duality theorem for higher-order Mond-Weir type multiob- jective programming involving cones. This fills some gap in recently work of Kim et al. [Kim D S, Kang H S, Lee Y J, et ... In this work, we established a converse duality theorem for higher-order Mond-Weir type multiob- jective programming involving cones. This fills some gap in recently work of Kim et al. [Kim D S, Kang H S, Lee Y J, et al. Higher order duality in inultiobjective programming with cone constraints. Optimization, 2010, 59: 29-43]. 展开更多
关键词 multiobjective programming higher order Mond-Weir dual model converse duality theorem CONES
原文传递
Second order duality for multiobjective programming with cone constraints 被引量:1
8
作者 TANG Li Ping YAN Hong YANG Xin Min 《Science China Mathematics》 SCIE CSCD 2016年第7期1285-1306,共22页
We focus on second order duality for a class of multiobjective programming problem subject to cone constraints. Four types of second order duality models are formulated. Weak and strong duality theorems are establishe... We focus on second order duality for a class of multiobjective programming problem subject to cone constraints. Four types of second order duality models are formulated. Weak and strong duality theorems are established in terms of the generalized convexity, respectively. Converse duality theorems, essential parts of duality theory, are presented under appropriate assumptions. Moreover, some deficiencies in the work of Ahmad and Agarwal(2010) are discussed. 展开更多
关键词 multiobjective programming cone constraints second order duality
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部