鄱阳湖区国内旅游市场开发

对鄱阳湖区旅游客源市场的构成、有利条件和旅游者的行为特征进行了分析，根据旅游客源市场需求变化，对旅游产品进行了细分，确定了鄱阳湖区旅游开发的主要产品，通过调查分析，提出了旅游产品经营、市场促销的方法和旅游市场分销体系建设的发展策略。     

灰色聚类法在城市公共交通发展水平评价中的应用

针对城市公共交通发展水平的评价难以做到客观、全面、准确的问题,构建了城市公共交通发展水平评价的指标体系及其递阶层次结构;运用灰色聚类分析法建立了数学模型对城市公共交通发展水平进行综合评价.利用该评价模型,对青岛市公共交通发展水平进行了实例分析,运行表明,评价结果与青岛市就公交现状所进行的民意调查结果基本吻合,提高了评价效率,从而提供了一条对城市公共交通发展水平进行定量分析的途径.     

Using DIRECT to Solve an Aircraft Routing Problem

In this paper we discuss a global optimization problem arising in the calculation of aircraft flight paths. Since gradient information for this problem may not be readily available, a direct-search algorithm (DIRECT), proposed by Jones et al., Journal of Optimization Theory and Applications, vol. 79, pp. 157–181, 1993, appears to be a promising solution technique. We describe some numerical experience in which DIRECT is used in several different ways to solve a sample problem.     

活动长度有限制的多工序批量加工生产计划研究

当前的化工制造中,有很多工厂使用柔性制造设备,并采用批生产模式来组织生产.由于对设备进行准备和清理的成本比较大,加工的排序一般采用多批次加工同一种产品的活动（campaign）模式.在实际的生产中,由于需要保证产品质量和减少库存,应该考虑限制活动的最大长度.本文针对活动长度有限制的多工序批量加工问题进行研究,利用状态-任务-网络概念和层级模型方法,提出了修正的活动计划模型.该模型是基于混合整数线性规划模型,并且以供应网络内总生产成本和物流成本最小化作为目标函数.最后用一个算例来说明所构建模型的有效性.     

Optimal Two-Agent Coordination for Graph Traversal: When Is Formation Travel Beneficial?

The objective of this paper is to pose and solve a simple class of coordinated motion problems that capture the following question; When is formation travel optimal? This class of problems is complementary to two related classes of problems that have received significant attention: close formation travel and the generation of flocking behavior. We pose and solve this problem for the case of two agents traversing a finite, connected graph. Two examples are provided, illustrating the application of the results.     

Modelling heterogeneity in manpower planning: dividing the personnel system into more homogeneous subgroups

Manpower planning is very useful for human resource management in large organizations. Most manpower models are concerned with the prediction of the future behaviour of the staff: they might leave the organization, get promoted or acquire more and new skills. This behaviour can vary a lot among different employees, what makes prediction difficult. It is common to tackle this problem by dividing the whole heterogeneous personnel system in several more homogeneous subgroups. This approach is often used to develop manpower planning models for prediction, control or optimization. Although the division in homogeneous subcategories is a fundamental and important step in the application of the models, up till now literature neglects to discuss a procedure to deal with this in practice. This paper suggests a general framework to find the distinguished homogeneous subcategories by determining and considering observable sources of personnel heterogeneity. Copyright © 2006 John Wiley & Sons, Ltd.     

High-Resolution Modeling of Energy-Services Supply Systems Using deeco: Overview and Application to Policy Development

Contemporary energy policy problems typically involve issues of (1) technology selection, placement, and scheduling, (2) energy-services demand modification by location and time-of-use, and/or (3) new sourcing options including emerging renewables. The high-resolution energy systems modeling environment deeco (dynamic energy, emissions, and cost optimization) naturally captures interactions between these components. deeco can assist with the search for policy sets which reduce CO₂ and/or displace depletable resource use and which take advantage of cost-effective system integration synergies. The network management objective may be treated as an exogenous variable and process performance can depend on the thermodynamic intensive state of the system. Numerical studies indicate that multiple policy interventions cannot be assumed to be independent and that staging can be significant.     

库存计划的稳定性和公司激励机制

文章讨论了在制造生产管理中库存计划的稳定性和公司激励机制 .公司通过工资制度激励工人 .构造了一个以公司和工人为目标的双目标规划模型 ,同时模型中考虑了库存计划的稳定性 .最后讨论了模型分别在制造加工速度由市场外部条件决定和由公司内部决策两种情况下的应用 .     

高校物流公司联盟服务站选址的研究

以国内高校周边物流公司的现状入手,论述高校设立物流公司联盟服务站的特点和优势,提出高校物流公司联盟服务站设计程序.基于离散选址模型及其对高校物流联盟服务站选址模型的启示,给出高校物流公司联盟服务站选址的计算模型.最后,以某高校为例进行物流公司联盟服务站选址规划并与该校物流联盟服务站实际地址作比较,比较结果表明,选址计算法是一个有效的算法,可以很好地应用在高校物流公司联盟服务站选址的研究中.     

旅游路线动态规划问题研究——以西安市出发为例

研究旅游路线动态规划问题,选取景区和所在市之间交通数据,构建飞机、高铁和自驾联合的复杂交通线路网络,建立旅游路线规划综合模型,以西安市出发为算例,利用Matlab编程并基于遗传算法求解,最终得出该旅游者十年内遍游全国201个5A级景区的最优旅游路线规划图.结论表明,通过获取的数据、建立的模型和算法可以有效解决多交通方式联动的自驾游路线规划,为更多的自驾游爱好者提供路线选择和个性化推荐.