ABC分析法在不平衡报价评审中的应用

针对不平衡报价在施工招标中呈愈演愈烈之势,严重损害招标人利益,在分析不平衡报价含义与表现形式的基础上,利用ABC分析法基本原理与思想,以某建设工程为例,探析ABC分析法在不平衡报价评审中的应用和实施,并运用ABC分析法对工程实践数据进行了筛选分析,筛选结果与工程实践相符.研究结果为解决工程建设评标中定量评审不平衡报价方...     

NEW TERRORISM

New or contemporary international terrorism associated with Islamic fundamentalism and the struggle against Zionism and American interests is a recent phenomenon in Kenya, different to that experienced during the struggle against colonialism. Many explanations have been offered as to why Kenya is being targeted, but have not sufficiently explored its close relationship with the West—especially Britain and the United States, the perceived connection between Israel and the former Presidency of Daniel Arap Moi, domestic forces and government policy. Externally the most important explanations for the increase in regional terrorism are the three waves of global terrorism since 1967, the most recent and significant of which is associated with Osama bin Laden and the Palestinian Intifada. These events reverberated in the region, Sudan and Somalia in particular, but also internally. Both internal and external attribution factors explain the resurgence of new terrorism in Africa. In the case of Kenya, terrorist attacks are associated with the country's internal domestic processes and a naïve approach to broader international issues.     

小子样条件下战斗部爆炸仿真数据可信性分析

高效毁伤战斗部试验次数受到严格控制,如何在小子样条件下分析仿真数据的可信性非常有必要。通过均匀试验得到了战斗部在地下目标腔室内部爆炸某点冲击波最大超压峰值,利用normplot及Lilliefors函数分析了仿真数据的分布特征,而后在已有检验方法的基础上,结合顺序统计量和均匀分布的特点提出了一种新的相容性验证思路。研究表明:该方法不受样本容量的限制,利用MATLAB程序编程可以快速判断仿真数据的可信性。     

建设项目施工组织设计的辅助决策和设计系统

介绍了铁路建设项目施工组织方案选优和图形文件辅助设计系统的功能、结构、特点和运行环境 ,给出了应用多层次多目标决策方法进行铁路施工组织设计方案选优的算法     

模糊数学在样本分类中的应用

应用模糊数学中聚类分析和模糊排序的方法,对具有多因素影响的样本分类提出一种合理的分类及排序方式,并用此方法对英语分级教学进行了研究.     

粒子PHD滤波存活粒子采样新方法

针对多目标跟踪粒子概率假设密度滤波算法中存活粒子的重要性密度采样问题,给出一种结合最新量测信息的存活粒子重要性密度采样新方法.该方法根据最新量测集中的各个最测与目标粒子的单步预测状态的似然值,以概率选取量测值,利用无迹变换获得粒子的重要性密度函数,并对其进行采样实现粒子概率假设密度滤波中存活粒子的采样,有效地减轻了粒子的退化现象. 3目标跟踪仿真试验中,当目标模型与跟踪算法使用的目标模型不匹配时,采用所提出的存活粒子采样方法的粒子概率假设密度滤波算法最优子模式分配距离下降约70km.论文给出的存活粒子采样新方法显著地提高了多目标跟踪粒子概率假设密度滤波算法的鲁棒性.     

小样本采样数据的预处理

一般情况下数据处理大多采用数理统计方法,该方法对于数据较少情况下处理和判别粗大误差不适用。提出了运用线性均方估计法和熵值判别法来处理和判别粗大误差,线性均方估计消除粗大误差是一种采用软化的方法处理粗大误差;熵值判别法是根据熵的上界对应最大的不确定度,利用所得数据的熵信息量判别数据是否含有粗大误差。这两种方法经过多个实例计算,结果表明,它们在处理小样本采样数据时更有效。     

Scheduling recurrent construction

A problem we call recurrent construction involves manufacturing large, complex, expensive products such as airplanes, houses, and ships. Customers order configurations of these products well in advance of due dates for delivery. Early delivery may not be permitted. How should the manufacturer determine when to purchase and release materials before fabrication, assembly, and delivery? Major material expenses, significant penalties for deliveries beyond due dates, and long product makespans in recurrent construction motivate choosing a release timetable that maximizes the net present value of cash flows. Our heuristic first projects an initial schedule that dispatches worker teams to tasks for the backlogged products, and then solves a series of maximal closure problems to find material release times that maximize NPV. This method compares favorably with other well‐known work release heuristics in solution quality for large problems over a wide range of operating conditions, including order strength, cost structure, utilization level, batch policy, and uncertainty level. Computation times exhibit near linear growth in problem size. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004     

信息管理系统开发中的进度控制

分析了信息系统开发项目的特点,开发过程中进度控制的一般工作流程及进度控制中经常遇到的问题与难点,针对某质量信息管理与辅助决策系统中进度控制实际流程,给出了常见问题与困难的解决方案。同时指出:应用挣值分析法评估项目进度时应对信息系统的重点、难点模块进行特殊监控。