缺货不补的随机存储系统的建模与仿真

基于(s,S)策略,讨论了缺货不通过到达的订货进行补充的随机存储系统.假定需求量、需求发生的间隔、以及提前时间都为随机变量,建立了系统的数学模型.给出库存总费用和缺货率的计算公式,将二者加权平均得到策略的综合系数.设计了系统仿真运行框图,在各种费用参数给定后,利用计算机仿真和综合系数来选定最优存储策略.     

高产梳棉机的“梳棉理论”(Ⅱ)

文章就锡林和盖板间的梳理作用;双区盖板和金属针布盖板;刺辊分梳板和锡林前后固定盖板、锡林与道夫间纤维转移;传统道夫机构的缺陷及其改进;锡林及刺辊的梳理作用与高产量的关系等问题,进行了全面系统地论述,加深了人们对梳理过程的深刻理解。     

沿海地区制衣业女工短缺的成因及对策

对沿海地区制衣业女工短缺的原因及影响进行了分析,提出了解决制衣业女工短缺问题的对策。     

21世纪北方城市新型住宅体系的探讨

从社会经济发展角度论述了建立北方城市新型住宅体系的必要性 ,提出发展新型住宅体系 ,以适应住宅产业化要求的思路。根据社会经济可持续发展要求 ,阐明对 2 1世纪北方型城市住宅体系的基本要求 ,提出实现新体系的生产方式和推进新型体系形成的途径     

理性增长十周年回顾及展望——以美国马里兰州为例

2007年10月在美国马里兰州举办了理性增长十周年（Smart Growth@10）会议。本文在回顾马里兰州理性增长十年发展历程基础上，严格审查马里兰州理性增长运动的实践成效，具体包括理性增长在土地利用变更、社区复兴、住宅偏好及选择、耕地保护、基础设施建设等领域所取得的成就和存在的不足，并总结了未来马里兰州理性增长运动进一步完善的政策建议，希望美国马里兰州的理性增长实践能够为中国未来城市规划、发展和管理的改革创新提供借鉴和启示．     

区域水资源短缺的多目标风险决策模型研究

在水资源短缺风险分析和评价的基础上,构建了区域水资源短缺的多目标风险决策模型,并提出了求解方法.应用该模型对包括北京和天津在内的首都圈进行水资源短缺风险决策分析.结果表明,要解决首都圈的水资源短缺问题,南水北调的作用是不可忽视的,其它水资源管理措施的投入也应该掌握一定的规模,这样才能保证区域社会经济的可持续发展和区域水资源的可持续利用.     

Anti‐corrosion additive for concrete

The Building Research Institute in Warsaw has developed an organic concrete additive, known as Dikszopt, which is derived from tanning oak extract. Tests, mostly in the laboratory but some in application trials, show that it has a remarkable ability to protect reinforcing steel against corrosion, notably in carbonized concrete. It also appears to improve the consistency of the concrete mix and retard the setting time, as discussed in this article from the Institute.     

Horizons and future of water desalination in Libya

A premature study has been conducted to overlook the viability and feasibility of the future of desalination in Libya, by estimating the water situation in several locations in the country. A simplified review of the spectrum of well-known desalination techniques and a presentation of these analysis of the water situation would be highlighted to guideline the planners on how, why and when to embark on desalination to resolve the water shortage problem that would be faced at any moment in the future. Finally the methods to resolve shortage problem alongside their economical evaluation would be considered briefly.     

Housing and Urban Poverty: A Consideration of the Criteria of Affordability,Diversity and Inclusion

This paper considers recent experiences in poverty reduction within urban areas. The discussion draws out emerging lessons for the provision of affordable and inclusive housing and neighbourhood development programmes that also address the diverse needs of urban poor communities. In particular, the discussion emphasises the importance of understanding the livelihoods of the poor and the strategies that lie behind these livelihoods if external interventions are to be successful in addressing the needs of low-income urban residents.     

房屋出租管理系统的设计与实现

随着信息化建设的逐步深入，如何利用现有的计算机技术建立一套高效、灵活、功能强大的管理系统，正成为计算机专业人员关注的重要问题。信息化进程不断推进，使得其更加逐步地渗透到了普通人的生活领域。本文通过对部分房屋出租方的功能分析、需求分析．进行房屋出租管理系统的设计与实现。具体实现了房屋出租房、客户等相关信息的添加等。