重庆地区复合抛物面聚光型PV/T系统实验

为了能够更加高效地利用太阳能资源,在重庆地区设计并搭建了实验平台,对不同季节复合抛物面聚光型PV/T系统(CPC-PV/T)进行了实验研究。结果表明:尽管重庆地区太阳能资源匮乏,但加入复合抛物面聚光器后,PV/T系统的整体光电转换效率最高可达到17.07%,系统全天光热转换效率达到58.2%。因此,该地区在夏季进行太阳能光电热综合利用是完全可行的,春、秋季太阳较好的天气也可利用。     

新型装备维修任务分配与保障资源规划分析方法研究

新型装备列装部队,对部队维修保障能力建设提出了更高更新的要求。为加速新型装备战斗力形成,急需一套科学、合理的方法用以确定装备维修任务和规划维修保障资源配置。针对这一问题,本文紧密结合我军实际,构建了新型装备维修任务分配与保障资源规划分析方法体系,规范了新型装备维修分析流程,并对分析过程中的关键技术进行了研究,最后开发了计算机辅助决策分析系统。     

军队人力资源培训问题的整数线性规划模型

文章研究了军队人力资源培训问题,并基于时间和费用两个指标,建立了一个满足培训时间约束且费用最省的0-1整数线性规划模型,给出了基于Lagrange松驰分解的模型求解算法。在算法中,采用一种简单可行的Lagrange乘子更新方法代替传统的次梯度法。另外,文章证明了算法获得最优解的两个充分条件,计算实例初步表明给出的算法是行之有效的。     

On valuing appreciating human assets in services

This paper derives optimal policies for when to hire, train, and lay off employees in service organizations when worker productivity appreciates deterministically or stochastically under constant, monotonic, and cyclic service demand. The model, an extension of the machine replacement problem from the engineering economy literature, uses infinite horizon linear programming to produce optimal personnel planning strategies and dual prices that characterize the workforce's economic value. The effect of employee attrition is also considered. In its valuation of human assets, unlike pure accounting approaches that only try to measure, this paper proposes an approach to capture the interaction between firm decisions pertaining to human resources and human resource value. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

软件保障性评估在维修性分配和预计软件中的应用

从软件保障性的影响要素——软件生命周期过程、软件自身的设计特性和保障资源出发，阐明了软件保障性评估的原理，提出了一套软件保障性评估方案。通过在某维修性分配和预计软件上的具体实践，充分验证了该评估方案的可行性和实用性。     

Client‐contractor bargaining on net present value in project scheduling with limited resources

The client‐contractor bargaining problem addressed here is in the context of a multi‐mode resource constrained project scheduling problem with discounted cash flows, which is formulated as a progress payments model. In this model, the contractor receives payments from the client at predetermined regular time intervals. The last payment is paid at the first predetermined payment point right after project completion. The second payment model considered in this paper is the one with payments at activity completions. The project is represented on an Activity‐on‐Node (AON) project network. Activity durations are assumed to be deterministic. The project duration is bounded from above by a deadline imposed by the client, which constitutes a hard constraint. The bargaining objective is to maximize the bargaining objective function comprised of the objectives of both the client and the contractor. The bargaining objective function is expected to reflect the two‐party nature of the problem environment and seeks a compromise between the client and the contractor. The bargaining power concept is introduced into the problem by the bargaining power weights used in the bargaining objective function. Simulated annealing algorithm and genetic algorithm approaches are proposed as solution procedures. The proposed solution methods are tested with respect to solution quality and solution times. Sensitivity analyses are conducted among different parameters used in the model, namely the profit margin, the discount rate, and the bargaining power weights. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

基于改进粒子群算法的装备维修资源优化问题研究

通过对粒子群算法的分析，针对其易过早收敛的不足，将遗传算法的变异操作引入其中，并给出了惯性因子的调整方式。在建立维修资源优化模型的基础上，结合实例运用改进的粒子群算法和模拟退火遗传算法进行了仿真，结果表明，该算法具有更好的收敛性。     

在任职教育中开发学员任职经验的探讨

任职教育是在受训学员有着一定的任职经验基础上，提高岗位任职能力的一种短期培训。在教学实施过程中，必须注重挖掘任职经验，交流任职经验，再把经验上升为理论从而去指导部队实践。这种任职经验的开发，有利于在教学过程中按需施教，扩大师生的视野，丰富教学资源，实现理论与实践的统一，有效达成任职教育的目标。     

Dynamics in pastoral resource management and conflict in the Borana rangelands of southern Ethiopia

Based on primary and secondary data, this paper provides a qualitative account of current changes in the pattern of natural resource management as a result of resource degradation and conflict in the Borana rangelands of southern Ethiopia. Population pressure, recurrent drought and the depleted carrying capacity of pastoral resources, as well as the encroachment of neighbouring ethnic groups, present the Borana community with a significant challenge. The diminishing resilience of traditional politico-judicial institutions under the famous Gada system often result in the rise of new forms of land use such as farming and private enclosures, which compete with the traditional communal tenure system. The gradual collapse of traditional norms and value systems and the apparent inefficiency in the formal administrative structures have exacerbated the problems of resource degradation and conflict between multiple resource-users.     

VNS和SA相结合的指挥控制资源部署

针对指挥控制资源部署问题,引入任务复杂度来定义决策实体的工作负载,并建立以最小化决策实体工作负载的均方根为目标的优化模型。针对传统的层次聚类法容易陷入局部最优,提出了一种变邻域搜索(Variable Neighborhood Search,VNS)和模拟退火(Simulated Annealing,SA)相结合的具有全局性的求解方法,使用VNS进行全局寻优,使用SA对VNS中的邻域进行局部寻优。最后通过一个联合作战案例的平台调度方案,验证了所提方法的优越性。