钛电刷镀镀液的探讨

本文对从钛盐的水溶液中获得金属钛镀层进行了研究。在理论分析的基础上,利用硫酸钛作为主盐,柠檬酸或可溶性氟化物作为主要络合剂,加以还原性J-A 添加剂,配制成钛的络合物水溶液,实现了电刷镀金属钛的可能性,并对此作了进一步的讨论.     

Primal dual algorithms for the vehicle refueling problem

Mehrez, Stern, and Ronen have defined a vehicle refueling problem in which a fleet of vehicles travels on a round-trip, self-contained mission from a common origin, with the objective of maximizing the operational range of the fleet. They have defined a “pure refueling chain” strategy for transferring fuel between vehicles in the fleet, and have solved the problem in the special cases when all vehicles have the same fuel capacity or consumption rate. In this article we present algorithms for the general case, where vehicles have different capacities and consumption rates. Our approach is based on a new primal dual formulation of the problem. The exact algorithm was effective to find the optimal solution for a fleet size n ⩽13. For larger fleets, we present an approximation version of it, which very quickly found a solution within 1% of the maximum possible range for arbitrarily large (up to n = 200) fleets. We also show that a small number of the best vehicles can always reach almost the same range as a large fleet. © 1992 John Wiley & Sons, Inc.     

利用UML建模开发炮兵指挥自动化系统

围绕开发一个炮兵指挥自动化系统的整个过程,利用统一建模语言(UML)建立模型,利用一系列视图描述了从需求分析、系统设计,到物理实现和系统部署的整个过程,将复杂的指挥系统用简单明了的可视化图形表示出来,给整个指挥自动化系统的开发提供了有利的条件.为炮兵指挥自动化系统的系统分析和建模提供了有效的途径.     

党委书记提高贯彻落实科学发展观能力的几个着力点

党委书记提高贯彻落实科学发观展的能力,要做到加强学习、放眼开怀,进一步增强大局意识;坚持制度、程序办事,进一步提高决策水平;集体领导、分工负责,进一步提高抓落实的能力;讲究艺术、当好班长,进一步提高统领班子的能力。     

科学发展观的政治意蕴

马克思主义是人类第一个建立在科学方法论基础上的社会发展理论,科学发展观是马克思主义社会发展理论的继承和发展。注重研究政治功能,在马克思主义社会发展学说中显得十分突出。无论从科学发展观提出的现实背景、过程,还是核心和主题词来看,都有十分突显的政治意蕴。尤其是“以人为本”,既承授了马克思人的自由和解放的命题,又突出以社会主义国家政权的力量来维护社会的平等和公正,科学发展观蕴含和展现的这一政治意蕴,是极为重要的和不可忽略的。     

不断增强旅团党委依法从严治军的本领

从严治军是军队建设的铁律。旅团党委是部队建设的“一线指挥部”,应当树立依法指导和开展工作的法制观念,严格职责管理权限,突出作风纪律建设这个重点,把提高部队战斗力作为根本标准,不断增强依法从严治军、加强部队正规化建设的本领。     

A network reformulation of an electric utility expansion planning model

We reformulate a multiperiod capacity expansion model of electric utilities as a network model. We show how to reconstruct the dual solution of the original mathematical program from the network model solution. To formulate the network model, we use information about the properties of the optimal solution of the mathematical program to reduce the number of constraints. The remaining constraints are then readily converted into network constraints. © 1993 John Wiley & Sons. Inc.     

目标区域局部特征和局部图像质量相结合的激光干扰效果评估

为客观描述光电成像系统激光干扰效果,提出目标区域局部特征和图像质量相结合的干扰效果评估算法。图像的局部特征用特征点描述,图像质量用结构相似度指数描述。该算法利用特征点匹配算法确定场景图像中的目标区域,计算干扰前后目标区域内特征点数量的变化、干扰后目标区域内未饱和面积所占的比重以及目标区域内图像的结构相似度指数,并将上述各参数相乘得到最终的评价指标。利用该方法对典型激光干扰图像进行评估,结果表明:在不同入射功率和不同光斑位置情况下,所提评估指标比单独使用结构相似度的评估指标具有更大的取值范围和更明显的非线性变化特征。这说明:该指标能够反映光电成像系统激光干扰过程的丰富细节,更加适合激光干扰效果的评估。     

On gamma estimation via matrix kriging

In financial engineering, sensitivities of derivative prices (also known as the Greeks) are important quantities in risk management, and stochastic gradient estimation methods are used to estimate them given the market parameters. In practice, the surface (function) of the Greeks with respect to the underlying parameters is much more desired, because it can be used in real‐time risk management. In this paper, we consider derivatives with multiple underlying assets, and propose three stochastic kriging‐based methods, the element‐by‐element, the importance mapping, and the Cholesky decomposition, to fit the surface of the gamma matrix that can fulfill the time constraint and the precision requirement in real‐time risk management. Numerical experiments are provided to illustrate the effectiveness of the proposed methods.     

水平集方法中速度停止项函数的改进

对速度停止项函数的研究发现,现今的速度停止项采用的单一全局阈值法很难使经典水平集算法得到较准确的分割效果。为此,提出了一种新的速度停止项函数,该函数通过引入变阈值较好的区分了图像的边缘区与同质区,以使采用该速度停止项函数的水平集方程实现在同质区加速演化,在边缘区停止演化的目的。实验结果表明,采用速度停止项函数能够使水平集方法获取更好的分割结果。