基于和谐论的新密市城区水资源配置研究

水质恶化引起的缺水问题是城市水资源供需矛盾的重要原因之一。合理配置水量水质,提高水资源利用效率和供水保证率,是城市健康发展的必然要求。本文将和谐论思想引入水资源配置,结合水资源分质配置思路,基于水资源配置量化指标体系和水资源配置模型,开展了新密市城区水量水质配置研究,为水资源优化配置提供定量分析的方法。     

移动无线传感网络节点协同避障的改进方法

传统蜂拥控制模型在协同避障跟踪方面,目前有Reynolds和Tanner的蜂拥模型。笔者曾对其做出了改进,提出了与Steer to Avoid法则相结合的避障模型,该模型在跟踪过程中对凸形障碍有较高的避障效率。由于在Steer to Avoid的方向判断中,目标对节点具有引力,使节点群陷入凹形区域无法绕出。将协同避障模型引入凹形障碍环境中,对模型进一步改进,在Steer to Avoid转向判断时暂时取消目标对节点群的引力,让节点群在进入凹形后自行做出环境的判断并沿着障碍边缘不断搜索路径,最终绕出障碍到达目标。仿真实验结果表明：与传统两个模型相比,该模型在避障的平均速率和时间效率上有显著提高,适用于避开未知的凹形障碍。     

有机物中微量砷测定方法的改进

在对有机物中微量砷测定方法综合分析的基础上，选用了砷斑法￣［１］与Ａｇ－ＤＤＴＣ法￣［２］相结合的方法检测有机物中的微量砷。重点对Ａｇ－ＤＤＴＣ法的操作内容作了两处改进。实验表明，新方法检测有机物中的微量砷快速、准确。     

聚偏二氯乙烯用途及生产技术

介绍聚偏二氯乙烯共聚物性能、品种及主要用途和国内外生产应用概况,分析了国内开发及市场现状提出对开发此类产品的建议。     

天然生物可降解材料在生物医学领域中的应用

天然生物可降解材料具有优良的生物相容性，良好的生物力学功能、物理化学性能、生物性能．且原料来源广泛，目前在生物医学领域得到了广泛应用。本文就应用最广的丝素、胶原和壳聚糖与甲壳质等几种主要的可生物降解材料在医学上的用途作一综述。     

Reliability analysis of a repairable k-out-of-n system with some components being suspended when the system is down

A k-out-of-n system with independent exponential components is investigated. It is assumed that some working components are suspended as soon as the system is down, repair starts immediately when a component fails and repair times are independent and exponentially distributed. Formulas for various reliability indices of the system including mean time between failures, mean working time in a failure–repair cycle, and mean down time in a failure–repair cycle are derived.     

基于自适应模糊控制器的氧枪冷却水系统

针对炼钢厂水站系统中的氧枪枪位控制，设计了一种自适应模糊控制器。根据控制器输出误差在线调整参数，并按照氧枪枪位随流量变化的规律进行连续调节，给出相应的自适应算法。以实时修正模糊规则。从而确定了每一炉各个阶段氧枪的基本枪位，改变了原系统水泵长期伞速运行造成严重能耗损失的状况。仿真结果表明：自适应模糊控制器能适应流量的变化，使氧枪枪位在整个炉役期都能处于最优的位置，改善了系统性能。     

导、地线补修管的设计

在介绍导、地线补修管的设计思想基础上,进行了导、地线补修管的设计.通过对导、地线线补修管的试验,研究了导、地线断股数量与补修管长度之间的关系.     

An estimation method for direct maintenance cost of aircraft components based on particle swarm optimization with immunity algorithm

A particle swarm optimization (PSO) algorithm improved by immunity algorithm (IA) was presented. Memory and self-regulation mechanisms of IA were used to avoid PSO plunging into local optima. Vaccination and immune selection mechanisms were used to prevent the undulate phenomenon during the evolutionary process. The algorithm was introduced through an application in the direct maintenance cost (DMC) estimation of aircraft components. Experiments results show that the algorithm can compute simply and run quickly. It resolves the combinatorial optimization problem of component DMC estimation with simple and available parameters. And it has higher accuracy than individual methods, such as PLS, BP and v-SVM, and also has better performance than other combined methods, such as basic PSO and BP neural network.     

微量铅和铬酸盐对高压铝箔腐蚀行为的影响

研究了含微量铅和无铅高压阳极铝箔在铬酸系和非铬酸系溶液中的电化学腐蚀行为和对比电容的影响.用扫描电子显微镜观察了铝箔的腐蚀形貌.结果表明,重铬酸盐腐蚀和微量铅均可单独使高压阳极铝箔在腐蚀过程中发孔均匀,并提高比电容.相关的环保型高压铝箔生产技术还有待深入开展.