A Study on the Method of Time-Resource Optimization of Engineering Projects     

CAO Xiao lin  WANG Jin gen 《保鲜与加工》2000,(2):49-53

This paper investigates the coordinated operation of the progress planning with the resource planning when carrying out engineering projects and puts forward a method of "RSM" under the resource limit conditions. Then, the "RSM" was improved to avoid complicated calculation. This method not only reduces the calculating work by hand but saves computer's memory as well, making the time-resource optimization work more quick and convenient.  相似文献   

A Dynamic Model for Generation Expansion Planning and Algorithm     

Yang Xiutai Nie Duan 《保鲜与加工》1993,(4):6-10

This paper discusses the problem of long-range generation expansion planning. A dynamic model for long-range expansion planning is set up and an algorithm-a two-step programming is presented, which is used here in a case.  相似文献   

AMETHOD OF COMPREHENSIVE EVALUATION TO DEVELOPMENT PROJECT ALTERNATIVES     

Zheng Xiaoqing 《保鲜与加工》1995,(4):9-17

In view of the complication of compreliensive evaluation to development projectplanning alternatives,an AHP model for comprehensive evaluation to the alternatives is advanced,the way of determinating the weight of each index affecting the aIternatives' quality is expounded,and the general methods of evaluating the alternatives with the indexes are given.  相似文献   

The Public Participation in the Urban Planning     

TIAN Wei-ji  LU Li 《保鲜与加工》2007,(3):41

The policy of public participation in urban planning was first practiced in Europe in the 1960s. After 40 years of development, the policy has become the essential step of city planning in Western countries where as is just at the elementary step in China. For the purpose of knowing the situation about the policy performing in local cities and discussing the feasibility of public participation in urban planning, several kinds of investigation have been done. From the investigation, it is found that although the public participation has already been the important step of urban planning in some city during just several years,there are still many problems. This paper shows a panorama view of this issue. Th describe the future of public participation in e authors will offer some solutions according to the problems and the urban planning.  相似文献   

Avoiding Obstacle Planning for Robots on Molecular Optimization Algorithm     

YANG Da-di  ZHANG Lei 《保鲜与加工》2007,(1):102-105

Interest in DNA computing has increased overwhelmingly since Adleman successfully demonstrated its capability to solve Hamiltonian Path Problem. This article introduces the improving method in virtue of the biological thery of DNA technology, a new molecular algorithm is advanced. After a numerical simulation, the result shows that it avoids the prematurely and lower convergent speed of the classic genetic algorithm, and inherits global search capability, the validity and the speed of the genetic algorithm have been increased. The best result can be obtained in few iterative times. It is fit for solving path planning problem.  相似文献   

A Muti-Objective Network Planning Model for Project     

Zen Fanqi Gu Yuasheng Zen Xianglin 《保鲜与加工》1993,(4):136-143

Based on the network planning model developed by the author for an overhaul project of a rolling mill production line in a heavy steel plant, an new multiobjective network planning model is proposed in this paper. The formulations of network time parameters are derived. The optimization problem of multiobjective network planning is also discussed. And it has been found out that the fractional single-objctive network is only one of the cases in this model.  相似文献   

A MULTI -OBJECTIVE FUZZY DECISION -MAKING APPROACH FOR POWER NETWORK PLANNING UNDER UNCERTAINTY     

Sun Hongbo Xu Guoyu Qin Yihong 《保鲜与加工》1992,(4):80-86

This paper proposes a multi - objective fuzzy decision - making approach for power network planning under uncertainty ,which simutaneously considers not only the least investment cost,the minimum power loss,the maximum reliability,and the least environmental impacts, but also the uncertainty about the future load growth and the capital investment availability. The validity and effectiveness of the proposed approach is verified with numerical examples.  相似文献   

五轴数控加工叶片无干涉刀位轨迹的计算   总被引：1，自引：1，他引：1  

杨方飞  阎楚良  林洪义 《农业机械学报》2003,34(2):97-100

根据微分几何特性，提出五坐标数控加工叶片时对叶片的工作面和背面的刀位轨迹计算分开予以讨论，对工作面而言，利用平头立铣刀加工时不存在干涉，而对背面而言，可能存在干涉。根据干涉的种类，分别对全局干涉和局部刀具干涉提出了快速判定依据，并对干涉点进行了修正。指出利用Iso-scallop法可获得最优的轨迹和蔗，并给出了实例。  相似文献   

The River Wadu role play — ten years experience     

Ian Carruthers  Laurence Smith 《Irrigation and Drainage Systems》1989,3(3):281-308

This paper describes a role playing planning exercise that has been used for training agriculturists, engineers and agricultural economists for more than ten years. It sets out the objectives and key features of the exercise and the experience that has been gained in its use. The exercise has been found to successfully test and integrate subject matter expertise acquired from formal teaching. It also highlights the multiple and often conflicting objectives of irrigation planning, and the need for full evaluation of alternatives and sound technical judgements under conditions of inadequate data and time pressure. The exercise is also successful in developing professional personal skills such as group working, interviewing and presentation, and is recommended as an effective training aid.  相似文献   

喷灌工程规划设计多方案选优的语言化与定量化相结合模糊综合评判数学模型     

程吉林 《节水灌溉》1992,(4)

本文提出了喷灌工程规划设计多方案选优的语言化与定量化相结合的模糊综合评判数学模型,从而可得到比传统喷灌工程规划设计方案选优方法更为合理、满意的结果。  相似文献