露天开采设计CAD系统的开发

针对露天煤矿开采设计工作的特点．开发了露天开采设计ＣＡＤ软件系统．文中系统地介绍了从矿床地质模型的建立、测量验收、开采计划编制到图表绘制等软件的编制方法。     

网格计算环境下作业调度的策略研究

根据网格计算环境的各种特点，分析了采用层次型策略进行作业调度的必要性和可行性。根据计算资源的结构特点，提出了建立层次型权系数模型的算法思想，同时根据权系数模型提出了一种较新的作业调度的算法，并对其作业调度算法作了仿真分析。此算法将为如何根据各节点的实时变化特征，动态地进行作业任务的局部调度提供了可靠的参考数据。     

不正常航班旅客流恢复方法

当航班计划受到扰动时,航空公司不仅要制定飞机与机组路线恢复计划以保证航班执行,更要尽快对旅客流进行恢复,以减少旅客延误或取消行程带来的经济损失。在飞机与机组路线恢复计划基础上建立旅客流恢复模型,通过以路径流量为变量的线性整数规划构造出受扰OD对集合,然后用深度优先算法构造出所有可行行程以单纯形法求解。实例结果表明,建立的模型和算法能够快速恢复旅客流,并且能够大量减少损失。     

另两类3×n同顺序排序问题近似最优解法的探讨

针对另两类3×n同顺序排序的特点,新解法给出了适用条件。新解法从缩短关键线路的长度的角度出发,利用均衡原理,虽比关键加工中心法稍加复杂,但优化程度明显,更接近最优解。此外,新解法在多数情况下可以判断是否达到最优解,且比较容易得到最优解。     

An analytically derived cooling schedule for simulated annealing

We present an analytically derived cooling schedule for a simulated annealing algorithm applicable to both continuous and discrete global optimization problems. An adaptive search algorithm is used to model an idealized version of simulated annealing which is viewed as consisting of a series of Boltzmann distributed sample points. Our choice of cooling schedule ensures linearity in the expected number of sample points needed to become arbitrarily close to a global optimum.     

有到达时间的三机器自由作业稠密时间表性能比

对于三机器自由作业加工总长问题，如果工件仅有两个到达时间，我们证明了稠密时间表的性能比为5/3。     

关于美国社区学院的学生服务体系

美国社区学院以适应学生需要为本来办学 ,来构建学院教学和管理体系。学生要获得学位 ,必须在所修专业领域学完一定门数的课程。每位学生的学习基础、学习方向、课程选择、学习方式等均需了解、研究、确定和调整 ,社区学院的学生服务体系正为这一需求提供了优质服务     

Integration of Radio-Frequency Identification and 4D CAD in Construction Management

In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.     

改进联盟竞赛算法及其在生产排产中的应用

针对基本联盟竞赛算法易陷入局部极小值、收敛速度慢的缺点,提出了一种改进联盟竞赛算法（ improved league championship algorithm, ILCA）。该算法可自适应地修正可调参数,平衡了全局收敛和局部收敛能力。同时,设计了全新的参赛队比赛赛程,提升了参赛个体的竞争力,并且引入了降级机制,保证了整个联赛的多样性。采用ILCA算法对标准测试函数进行寻优。结果表明,ILCA的全局搜索性能、收敛速率都明显地优于其他算法,将该算法应用于车间生产排产模型的参数估计,取得了良好的效果。     

Estimation Method of Schedulecost Correlation Coefficient of Spaceflight Project

To evaluate the cost risk and the schedule risk of the spaceflight project, the schedulecost (SC) correlation coefficient is directly appointed according to the experts’ experience usually. This paper deduces SDMCU (the schedule distribution model considering the effect of the cost uncertainty), and then proposes the approximate formula to estimate the ln (S)C correlation coefficient based on the models of SDMCU and CDMSU (the cost distribution model considering the effect of the schedule uncertainty). Furthermore, an approximate relationship expression of the SC and the ln (S)C correlation coefficients is put forward according to general facts and the Taylor expansion, and advanced by means of mass numerical validation is the general rule of obtaining the estimation value of the schedulecost correlation coefficient based on the historical data.