C3I系统中战术态势估计的推理方法

本文首先讨论了态势估计中推理框架的现有形式，并从中抽取共性；然后讨论了推理算法的研究现状及存在的问题；最后在推理框架共性之下，提出了应用模糊理论和统计理论解决这些问题的步骤。     

解析与数值结合的方法及采用子结构法的改进

本文以常微分方程求解器为基础,采用康脱洛维奇法和线法,分别以矩形截面杆的扭转问题和含裂纹的Motz问题为例,对解析与数值结合的方法,进行了初步的研究.特别是在将子结构法引入后,数值结果得到明显的改进.     

用于军事态势估计的协作知识模型

分布式人工智能（ＤＡＩ）是ＡＩ领域的一个新分支。ＤＡＩ研究的主要目的在于分析和设计大型复杂的协作智能系统。本文以军事智能决策过程中的重要环节──态势估计任务为背景,提出了用于实现分布式协作求解的知识表示框架ＤＥＳＷ系统。文章简要分析了军事态势估计领域背景,然后从系统设计的三个方面依次介绍了ＤＥＳＷ的系统组织模型、主体概念模型和分布式协作推理模型。     

八毫米低副瓣卡氏天线的优化设计

为了解决副面遮挡导致小口径卡氏天线（Ｄ＝２９３ｍｍ）副瓣电平恶化这一难题,本文提出了一种优化赋形方法。采用优化口径场分布,对主、副面形状进行赋形设计。用该法设计了一种八毫米低副瓣卡氏天线（ｓｌｌ１≤－２５ｄＢ）,实验结果与理论计算十分吻合。     

Ada网络文件传输系统的实现

本文介绍了一个在NETBIOS支持下用Ada的任务机制实现的网络上任意两节点间的文件全双工传输系统。传输时,文件以数据报的分组形式发送,由Ada 的任务特性来管理收、发进程,实现后台全双工操作。本文还简要地介绍了实现中的一些技巧。     

聚氨酯/环氧树脂SIN中的增塑作用初探

本文通过测量聚醚氨酯(PU)/环氧树脂(EP)SIN系列的玻璃化转变温度(Tg);并对该数据进行分析及用DiBenedetto理论式对该Tg数据进行了处理,发现PU/EP SIN中,EP对PU链段存在着较强的增塑作用,这个增塑作用与PU与EP网间的互穿作用并存,它主要受PU/EP组成配比等因素的影响。     

毫米波高效率双极化馈源的研制

本文介绍已设计成功的一个8毫米波段、能工作于双极化状态的高效率馈源。馈源的各种性能指标比较优良,理论与实验十分吻合,文中提供了一组新的通用设计曲线,在设计各波段的变锥角高效率多模馈源时均可利用。     

Supercritical carbon dioxide as a new working medium for pneumatic launch: A theoretical study

Compared with the conventionally gaseous or liquid working media, the specific internal energy of supercritical carbon dioxide (SCD) is higher at the same temperature and pressure, and the critical temperature of carbon dioxide is close to room temperature, making SCD a potential new working medium for pneumatic launch. To analyze the feasibility of this conception, an analytical model of a pneumatic catapult is established on basis of the conservations of mass and energy. The model consists of a high-pressure chamber and a low-pressure chamber connected by multiple valves, and there is a movable piston in the low-pressure chamber that can push an aircraft to accelerate. The effects of the launch readiness state of SCD in the high-pressure chamber, the initial volume of the low-pressure chamber and the valve control on the movement of the aircraft are analyzed. It is found that there is a restrictive relation between the temperature and pressure of the launch readiness state of SCD, i.e., there is a maximum allowable launch readiness pressure when the launch readiness temperature is fixed. If this restrictive relation is not satisfied, the working medium in the low-pressure chamber will drop to its triple point within a few milliseconds, leading to a launch failure. Owing to this restrictive relation, there is an optimal launch readiness state of SCD with the highest working capacity for any allowable launch readiness temperature. The pressure of the low-pressure chamber will decrease significantly as the initial volume increases, leading to a decreased acceleration of the aircraft. The ac-celeration can be controlled below a critical value by a designed sequential blasting technique of multiple valves. The calculated results show that a 500 kg aircraft can be accelerated from 0 to 58 m/s in 0.9 s with 36 kg of carbon dioxide. This research provides a new technique for the controllable cold launch of an aircraft.     

Transshipment through crossdocks with inventory and time windows

A major challenge in making supply meet demand is to coordinate transshipments across the supply chain to reduce costs and increase service levels in the face of demand fluctuations, short lead times, warehouse limitations, and transportation and inventory costs. In particular, transshipment through crossdocks, where just‐in‐time objectives prevail, requires precise scheduling between suppliers, crossdocks, and customers. In this work, we study the transshipment problem with supplier and customer time windows where flow is constrained by transportation schedules and warehouse capacities. Transportation is provided by fixed or flexible schedules and lot‐sizing is dealt with through multiple shipments. We develop polynomial‐time algorithms or, otherwise, provide the complexity of the problems studied. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005     

浅谈变声期声乐教学的要求与方法

对于许多高等院校的音乐教育专业来说,培养目标的主要在于培养合格的中小学音乐教师。而这对于即将成为音乐教师的学生来说,如何掌握青少年变声期前后的声音特征,心理特征;并能运用科学的方法,适当的要求来进行教学,具有非常重要的意义。