共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
随着时代的发展,国际经济竞争日趋激烈。人们对产品的要求逐步增高,使得企业对工件的时间规划和做工要求上更加精益求精。实际生产的不确定性也越来越受到各界的重视,诸如机器发生故障的不确定性、用户具体要求的模糊性、工件实际加工时间的模糊性等不确定因素也在车间调度中被加以考虑。而这类问题也由于更接近于实际生产活动而倍受关注,诸类不可预测事件具有动态性,相较于确定性的问题难度有所加深,算法也更加复杂。通过众多学者的不断努力,目前已经出现不少的研究成果。 相似文献
3.
针对复杂迷宫环境下移动机器人路径规划中存在的寻路时间较长、效率较低等问题,提出了一种将可见光指纹信息与A*算法相融合的迷宫机器人路径规划算法。该算法引入局部、全局障碍密度参量对A*算法的评价函数进行优化,使评价函数可以自适应障碍物密度;同时引入可见光指纹信息,利用障碍物对可见光光源的遮挡程度来判断各方向路径是否通畅,解决了A*算法在寻路进程中无法预见后续障碍物的问题。仿真结果表明,基于可见光指纹的改进A*算法能够有效减少传统A*算法的路径搜索点数量,平均寻路效率提高了43.5%,具有一定的应用价值。 相似文献
4.
在现代物流集约化、一体化的发展过程中,配送是直接与消费者相连的重要环节,配送车辆优化调度是物流系统优化、物流科学化的关键一环,是企业改善服务水平、降低物流配送成本、提高经济效益的重要途径。 相似文献
5.
6.
车辆路径问题是物流配送中的决策难题,配送成本的减少成为优化的主要目的,而科学家们对车辆调度优化采用的方法层出不穷。本文针对节约算法做了简单的概述与研究,并以飞马快运公司为例,采用节约算法对该公司的车辆调度进行简单的调整。 相似文献
7.
8.
随着我国经济的发展,城市化进程逐渐加快,城市的耗电量日益增多,也使浪费现象日益严重,为了促进提高电网的利用效率,节约资源,就要优化电力调度,保证电网经济运行的畅通、安全,用最小的消耗实现最大的经济利益。本文就电力调度系统及发展情况进行简要的分析和介绍,探究优化电力调度,实现电网经济运行的有效策略。 相似文献
9.
针对水库运行调度管理系统所进行的开发与设计,是实现自动化调度管理的重要条件,同时还是发挥自动化控制技术作用的有效举措.现阶段,水库调度管理自动化的水平较低,怎样才能够有做好对调度管理系统的改造和优化,是水库管理系统开发过程中必须要重视的问题.基于此,本文结合实际情况,针对水库调度自动化管理的实现进行了深入分析,提出了有... 相似文献
10.
11.
Henry Krägenau 《Intereconomics》1984,19(1):39-44
Japan's high and increasing trade and current account surpluses have aroused in the other industrialized nations a growing fear of Far Eastern competition. Some countries consider that protectionist measures are the only suitable response to increasing imports from Japan. Japan's “unfair” conduct of its foreign trade is often cited as a reason for such a reaction. Is this reproach justified? What can be done to avert the dangers to both Japan's foreign trade and the world economy caused by this situation? 相似文献
12.
13.
宫志华 《中国对外贸易(英文版)》2010,(16)
本文从高层宾馆的火灾危险性及自身特点出发,分析了常见的火灾隐患及影响火灾蔓延的重要因素,提出了高层宾馆的防火技术要求,并从建立组织制度、加强教育培训和加强监督检查等几个方面提出要加强高层宾馆内的消防安全管理,以减少或避免火灾的发生. 相似文献
14.
据国家统计局公布,2013年我国粮食总产量突破6亿吨,实现“十一连增”。然而,继续确保国家粮食安全还面临需求不平衡、水土资源趋紧、粮质退化等诸多挑战。专家呼吁,应树立新型国家粮食安全观,妥善处理粮食数量与质量、提高农业综合生产能力与可持续发展能力、挖掘国内生产潜力与积极利用国外市场的关系,加快构建高效、开放、可持续的国家粮食安全保障体系。基于此,本文从生态环境、科技应用、区域布局、法律保障、应急预警等方面着眼,探讨粮食安全长效机制、保障机制、预警机制三大机制架构。 相似文献
15.
国家密集出台区域规划,其原则依然遵循渐进改革思路。经济活动的聚集和利益关系的平衡可以兼顾,区域发展的效率和公平如何兼顾?过去两年里,在包括经济学家张军扩在内的专家指导及各地支持之下,由朱敏老师负责的研究团队顺利进行以"调研中国:多轮驱动的新经济增长极"为主题的中国区域经济发展研究课题,并定期出版了环渤海(含京津冀、辽东半岛、山东半岛)、北部湾、成渝、长株潭等经济区的分报告。本文既可视作该项系列调查研究的阶段性成果之一,又具有较强的专论意味。文中特别强调,不能专门为了平衡而失去效率,而应充分发挥各地的比较优势,充分发挥市场机制的作用。 相似文献
16.
Philip Cooke 《Small Business Economics》1996,8(2):159-171
Today, the number one priority for competitive advantage is innovation. A new approach to regional business development has been pioneered in Europe and the U.S.A. This involves building a regional innovation infrastructure. Learning through networking has proven to be a successful approach in some of Europe's more dynamic regional economics such as Baden-Württemberg and Emilia-Romagna. This involves maximising the complete range of regional innovation assets. The state of Pennsylvania and other older industry centres are showing that such an approach is transferable from Europe to the U.S.A. The paper assesses knowledge-transfer at the regional level and outlines the key elements for successful regional innovation networking practices. The major finding(s) are that business networking is an effective way of increasing company turnover; that not-for-profit organizations are excellent for setting up networks because they are trusted, and that innovation networks are perhaps the most difficult, thought-requiring but important of the types of business network conceivable. 相似文献
17.
Gary A. Knight 《Thunderbird国际商业评论》1997,39(3):351-374
Firms behave differently in free trade zones than in confined, domestic markets. To investigate this phenomenon, a taxonomy is developed of small- and medium-sized companies, which operate in the developing North American free trade area. The study describes each firm grouping and its associated performance attributes, and offers theoretical and normative implications. Among other findings, it appears that smaller companies which emphasize entrepreneurial orientation, product differentiation, and focus on specific market segments tend, under free trade, to enjoy superior performance. 相似文献
18.
The purpose of this study is to offer development strategies for hidden champion firms; it is thought that in order to overcome Korea’s economic crisis and to secure new growth engines for sustained economic development, the country needs to foster more hidden champions that can lead global market. The study draws from an empirical survey of 61 Korean firms on hidden champion promotion list as well as 45 experts; the results were analyzed using SWOT/AHP model and a corporate competitiveness index to develop development strategies for Korean hidden champions. The results suggest that Korean hidden champions should seek opportunities for industrial growth based on technological strength, create competitive advantages in the market, and reduce their dependency on large corporations. Hidden champions should target market niche rather than competing with global firms; this is possible with competitive strengths based on specialist technology that will satisfy customers. Thus, authors argue that small- and medium-sized enterprises in Korea should focus on developing technological competences in order to possess specialist core technology that will support their growth in the global market. 相似文献
19.
20.
把握资本进出关--我国利用外资中的国家经济安全问题分析 总被引:4,自引:0,他引:4
外资带来的国家经济安全问题主要包括市场垄断、产业控制、技术依附和金融危机以及由此带来的宏观经济不稳定。外资对我国产业安全、技术安全和金融安全的影响问题,主要是负面影响问题。由于我国近70%的外资集中在制造业,制造业是产业安全争论的焦点,因此,关于外资对产业安全影响的讨论也主要放在制造业上。 相似文献