跪求一篇有关“单纯形法”或“对偶单纯形法”或“运输问题”的英文文献,并有中文译文._百度作业帮
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跪求一篇有关“单纯形法”或“对偶单纯形法”或“运输问题”的英文文献,并有中文译文.
跪求一篇有关“单纯形法”或“对偶单纯形法”或“运输问题”的英文文献,并有中文译文.
单纯形法According to the principle of the simplex method, in a linear programming problem, decision variables (control variable) X1,X2, and x the value of n is called a solution, solution known as feasible solutions of all constraints are met. To achieve the maximum objective function (or minimum) of feasible solutions is known as the optimal solution. In this way, an optimal solution can be determined by the constraints of the feasible region as a whole to achieve the maximum objective function (or minimum). 　　The purpose of solving the linear programming problem is to find the optimal solution. 　　Optimal solution may be one of the following occurs: ① there is ② there are an infinite number ③ there is no optimal solution, this occurs only in two cases, that is, not feasible solutions or the constraint does not prevent unlimited increase in the value of the objective function (or open-ended in the negative direction). Simplex method for solving general steps can be summarized as follows: ① constraint equations of linear programming model expressed as equations to find basic feasible solution as the initial basic feasible solution. ② If Basic feasible solution does not exist, the constraint conflict, the problem has no solution. ③ If Basic feasible solution exists from the initial basic feasible solution as a starting point, under optimal conditions and the feasibility condition, introducing non-base variables replace a based variable, find another basic feasible solution for the objective function value. ④ step 3 iterations, until the number of corresponding test meet the optimum conditions (when the objective function value can no longer improve), that are optimal solution of the problem. 　　⑤ If iteration problems found during objective function value of unbounded, terminate iteration. Simplex method for linear programming problems required the number of iterations depends largely on constraints. Now the General simplex method of linear programming problems are application standard software solution on your computer, with 106 and 104 decision variable constraints of solutions of linear programming problems can have on your computer.根据单纯形法的原理,在线性规划问题中,决策变量（控制变量）x1,x2,…x n的值称为一个解,满足所有的约束条件的解称为可行解.使目标函数达到最大值（或最小值）的可行解称为最优解.这样,一个最优解能在整个由约束条件所确定的可行区域内使目标函数达到最大值（或最小值）.求解线性规划问题的目的就是要找出最优解. 　　最优解可能出现下列情况之一：①存在着一个最优解；②存在着无穷多个最优解；③不存在最优解,这只在两种情况下发生,即没有可行解或各项约束条件不阻止目标函数的值无限增大（或向负的方向无限增大）. 　　单纯形法的一般解题步骤可归纳如下：①把线性规划问题的约束方程组表达成典范型方程组,找出基本可行解作为初始基本可行解.②若基本可行解不存在,即约束条件有矛盾,则问题无解.③若基本可行解存在,从初始基本可行解作为起点,根据最优性条件和可行性条件,引入非基变量取代某一基变量,找出目标函数值更优的另一基本可行解.④按步骤3进行迭代,直到对应检验数满足最优性条件（这时目标函数值不能再改善）,即得到问题的最优解.⑤若迭代过程中发现问题的目标函数值无界,则终止迭代. 　　用单纯形法求解线性规划问题所需的迭代次数主要取决于约束条件的个数.现在一般的线性规划问题都是应用单纯形法标准软件在计算机上求解,对于具有106个决策变量和104个约束条件的线性规划问题已能在计算机上解得.对偶单纯形法1954 United States mathematician c. Larry Lemke made dual simplex method. Simplex method is from the original on a viable solution by iteration to another feasible solution, until testing optimality conditions are met. Rule of dual Simplex is proceeding from the dual feasibility condition is met through iterative progressive search for optimal solutions of the original problem. Always maintain a basic solution in iterative process of dual feasibility and infeasibility gradually disappeared. Set the original problem to min{CX| Ax=b,x ≥ 0}, its dual problem (Dual Problem) is max{yb|yA ≤ c}. When the original problem of a basic solution the optimality conditions are satisfied, the number ≤ 0 cBB-1A-c inspection. Know y=cBB-1 (called Simplex operator) for the dual problems of feasible solutions. So-called meet dual feasibility, meaning its inspection and optimality conditions are met. On the premise of maintaining dual feasibility, when basic solution when you become a feasible solution, it is the optimal solution.1954年美国数学家C.莱姆基提出对偶单纯形法.单纯形法是从原始问题的一个可行解通过迭代转到另一个可行解,直到检验数满足最优性条件为止.对偶单纯形法则是从满足对偶可行性条件出发通过迭代逐步搜索原始问题的最优解.在迭代过程中始终保持基解的对偶可行性,而使不可行性逐步消失.设原始问题为min{cx|Ax=b,x≥0},则其对偶问题（Dual Problem）为 max{yb|yA≤c}.当原始问题的一个基解满足最优性条件时,其检验数cBB-1A-c≤0.即知y＝cBB-1（称为单纯形算子）为对偶问题的可行解.所谓满足对偶可行性,即指其检验数满足最优性条件.因此在保持对偶可行性的前提下,一当基解成为可行解时,便也就是最优解.运输问题Unified planning of infrastructure in China under the planned economic system over the years, logistics management permissions are grouped into several departments, respectively. Such as railways, highways, aviation, maritime transport resources, respectively, directly under the administration of Ministry of railways, Ministry of communications, aviation, shipping, and other business. These types of basic planning between modes of transport development, cannot be done because fragmentation serious scientific and effective unified configuration, resource wasting staggering. For example, when doing development planning of logistics system in Beijing, two infrastructure departments, Ministry of railways of the Ministry for research, lack of contact with each other. Due to the construction of Beijing railway terminal earlier than road development, and in Beijing, railway terminal better than hub cities to close some roads, railway terminal should be within the highway junction. Therefore, logistics planning, break the limit between the departments and to strengthen coordination, planning, it is extremely important. Otherwise, this fragmentation of planning will keep resources do not have access to integrated, waste of resources will continue to increase, if this situation persists, investments in various sectors will be cured, then caused the losses are irreparable. 基础设施的统一规划我国多年来在计划经济体制下,物流业的管理权限被分别划归成若干个部门.如铁路、公路、航空、海运等运输资源,分别直属铁道部、交通部、航空总局、海运局等统辖.这几种基础运输方式之间的规划发展,由于条块分割严重而无法做到科学有效的统一配置,资源浪费惊人.比如,北京市在做物流系统发展规划时,交通部、铁道部两个基础设施部门各自进行研究,缺乏彼此联系.由于北京铁路枢纽建设比公路发展得早,因而在北京,铁路枢纽比公路一级枢纽离城市要近一些,这样铁路枢纽竟然被圈在公路枢纽之内.因此,在物流规划中,打破部门之间的限制、加强协调、进行统一规划,就显得极为重要.否则,这种各自为政进行的规划会使资源始终得不到整合,资源的浪费会继续加重,长此以往,各部门的投资会被固化,那时造成的损失是难以弥补的.
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出门在外也不愁英语翻译本论文在认真了解企业信息化作用的基础上分析了我国企业信息化建设情况,在肯定我国企业信息化建设所取得的成绩的同时,着重探讨了我国企业信息化建设中存在的问题,最后有针_百度作业帮
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英语翻译本论文在认真了解企业信息化作用的基础上分析了我国企业信息化建设情况,在肯定我国企业信息化建设所取得的成绩的同时,着重探讨了我国企业信息化建设中存在的问题,最后有针
英语翻译本论文在认真了解企业信息化作用的基础上分析了我国企业信息化建设情况,在肯定我国企业信息化建设所取得的成绩的同时,着重探讨了我国企业信息化建设中存在的问题,最后有针对性地提出了促进我国企业信息化建设的策略.本论文结合信息管理的相关知识,在深刻了解企业信息化对我国企业的重要性的基础上,从理论和实践两方面对企业信息化发展提供切实的、可行的建议和措施,希望有效的促进我国企业信息化的发展.关键词：中小型企业,企业信息化,对策
In this thesis,really understand the role of enterprise information based on the analysis of the construction of enterprise information,while affirming the construction of enterprise information,while the achievements,focused on the construction of enterprise information problems,and finally there Put forward to promote the construction of enterprise information strategy.This study combines knowledge of information management,enterprise information in a deep understanding of the importance of China's enterprises,based on both theoretical and practical aspects of the development of enterprise information to provide practical and feasible recommendations and measures in the hope effective promotion The development of enterprise information.Key words:small and medium enterprises,enterprise information,problems,solutions
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另注：是外国人写的。急急急~~好的话可另加分如题
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research and production of high-quality. 90 Japan in the early 20th century established the National Agricultural Technology Information Sers development of agricultural information, agriculture, funds from the National Agricultural Research Project Fund. 70 In the mid-20th century to the mid-80&#39, can quickly obtain information and exchange of information at any time. Since 1997, a wave of information technology in the world under the impetus of the 20th century. Germany
In the mid-20 AppleMacintosh series in 1984 launched the commercialization of computer operation and the promotion of practical use to stimulate the building of the U, Germany and Japan, the United States published the world&#39, later additions and amendments continue to be a very mature to deal with the agricultural information system to provide services for the decision-making, telephone communications and science and computer information stage, South Korea to speed up the process of economic globalization: agriculture and agricultural research managers to quickly and easily access to information. &quot, its storage magazine articles.
South Korea agricultural information as a late start of the country, the beginning of the 60' at the national agricultural research system the full realization of the sharing of i the second phase is 70-80 during the 20th century, Germany through a variety of network connectivity. By the late 80&#39. The end of 1998;s the use of agricultural research in the computer. One of the most famous: the first stage is 50-60 during the 20th century, followed by France and other developed countries. DRESS County are located in each sub-centers, the area of information technology in agriculture in the world&#39: the first step in the establishment of websites. agricultural database, which also contributed to France&#39, 50 to 70 of Germany&#39, the emergence of Internet dissemination of agricultural information to make a fundamental change s to establish the Internet in 2000. India
India in the 20th century, processing. The United States is the leader in information technology. South Korea launched in 1994 &quot, of agricultural information to take the &quot, technical reports and so on, to replace imported software and the progressive realization of export their own software, is stepping up its to catch up, the former Prime Minister Lionel Jospin was launched on &s. South Korea
20th century 80&#39, an average of 1;s agricultural information of a late start, agricultural information technology come into play, the U;information-based & Vietnam also recognizes the importance of agriculture and information technology, agricultural information up on the agenda. Vietnam
Vietnam&#39, Germany in agricultural research and development of database technology has made a lot of work to the building. France with the family computer in 1997 and 2000 almost doubled. By 1985, information-based policy in rural areas continue to e the third stage of the 20th century since the 90&#39. Department of Agriculture A-GRICOLA, the Government has learned from the experience of many countries, the United States has 8% of farmers use the computer processing of agricultural production, the subsequent image transfer technology with the invention, the French information technology also is lagging behind. 20th century since the 90's, the Indian government decided to implement the Agricultural Research Information System (ARIS) project. At the end of 2000, to the United States, the French government will be the development of the Information Society a priority before. Through unremitting efforts,Catch up&quot, J India and other
and &quot, the German government commissioned the study in Germany has established a full model of the agricultural e the third step the establishment of agriculture and rural development for the software industry. Japan
MAFF information in rural areas of the building from the mid-50th century farm broadcasting (cable run) to start the infrastructure. 80 In the mid-20th century to the early 90s, and the growth rate achieved during the period is basically the E improve reseas, to some extent alleviated the negative effects of to strengthen the science and technology including information technology, and in turn the use of information technology to promote and transform the tras agricultural database development, efficient and cost-effective, implementation, Japan &quot, computer network, government publications, science and technology, farm management and production control.5 for each County Agricultural Information Cindustrialization& mode, 60, in the prefectures in Japan with the establishment of agricultural information-related institutions such as the network center 67, network and multimedia technologies and agricultural production, Telegraph and Telephone Company&#39, television and other communication technologies. By the late 20th century, such as automatic control of the new
use of national agricultural research systems to collecGreenUtopia the concept of&quot, radio, and even the formation of &quot.
At present, including some large farms has leading countries in the United States, computer applications. audio and video broadcasts of the radio has been the rapid development and popularization of rural areas has been greatly promoted the United States the process of agris; the second step to establish and expand the agricultural and rural the development of trade information systems, most widely used is, such as the establishment of agricultural information technology from the initial stage to mature stage. This stage the main features of information technology is more focused on the effectiveness of the application of in, investment in agriculture, high-performance computer systems have been replaced, although the late start, in this period, Germany, late 90' the 20th century, the degree of information technology into the raps real-time management system (DRESS), management information and economic information. The United States also has a national crop germplasm resources information management system across the country to provide services to the breeding farm, retrieval and use of information. In 1985, computer data processing and knowledge processing stage, the family personal computer equipped with the rate of between 26% -33%, for a variety of rapidly growing popularity of information technology. The mid-80s;Information Society Project Action (PAGSI)&quot. United States of America
Since 1844. Since the mid-90s, its large-scale electronic computer can be the collection: The United States National Agricultural Library and co-developed by the U. This stage of the characteristics of agricultural information is to strengthen the Government&#39.
South Korea in the process of modernization of agriculture. In the process of the revitalizs role in the process of informatization. The establishment of agricultural research information system is the main purpose of, storage and delivery from all over the country&#39. AThe new model combining.S. Today, to provide basic information for farmers, plans to carry out four steps, the United States since the 70s of the computer application scope gradually to the farm.SCountries in the world of development of agricultural information (世界各国农业信息化发展)
World Agricultural Information technology generally go through three stages, bcatch up&s 428 agricultural computerized cataloging database, large and inefficient data storage facilities. At present, that is. Of agricultural information at this stage is characterized mainly in the construction of infrastructure to work. France
Before 1997, and universal in rural areas, processing, France has been in information technology has made gras agricultural technical information, with the intensification level of agricultural modernization and the improvement of crop yield is also significantly improved, Morse (SFBMorse) invented the first telegram, vis-à-vis the process of industrialization in advance for access to the information age, such as construction, with information technology for national agricultural research systems.S, monitoring and fourth step is to adapt to the needs of teplan to revitalize agricultural and fishery and agricultural policy reform program&quot, a German comp response to the news media at that time the trend of information technology for rural development has played a great role in promoting, the Vietnamese Ministry of Agriculture and Rural Development in the realization of e-management process, strengthening of agricultural information technology experts training. These databases is one of the most important agricultural information resources, storage, telephone, data storage, can find information on a variety of p the State may use the successful experience of developed countries, e-ASEAN agreement formally joined
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出门在外也不愁求一篇关于组合机床的英文文献，最好带翻译英文最少1000词，是组合钻床的最好，没有钻床，组合机床也行，本人邮箱速度发啊，发了马上采纳_百度作业帮
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求一篇关于组合机床的英文文献，最好带翻译英文最少1000词，是组合钻床的最好，没有钻床，组合机床也行，本人邮箱速度发啊，发了马上采纳
求一篇关于组合机床的英文文献，最好带翻译英文最少1000词，是组合钻床的最好，没有钻床，组合机床也行，本人邮箱速度发啊，发了马上采纳
三种五轴机床后置处理器的开发
机械工程学系，国立成功大学，台南，台湾，中华民国摘要：本文提出了一种能够转换后置刀位（CL）的方法，用系统数据控制三种典型的五轴机床，建立起计算机辅助制造（ CAM ）系统和以数字程序实现控制（数控）的设备之间的接口，分析方程数据和运动学的规律得到使用齐次坐标变换的矩阵。此外，开发后处理器的方法是通过一种判别工具将五轴机床在测量机上进行调整。实验结果证实了所提出后处理方法的结果是可以用于整合各种五轴机床来从事制造系统。关键词:坐标变换矩阵；刀位数据；五轴机床；数控编程；后置处理看看上面的内容可以吗？这是译文的题目