布尔函数的Walsh谱绝对值分布及其性质研究

提出并研究了布尔函数的Walsh谱绝对值分布.指出布尔函数Walsh谱绝对值分布在仿射变换下的不变性,计算了n(n≤5)元布尔函数的Walsh谱绝对值分布,研究了Walsh谱绝对值分布与Walsh谱支撑和Walsh谱中非零取值个数以及其他一些密码学难题的联系,最后研究了布尔函数的Walsh谱绝对值分布的大小.     

Butterworth低通滤波器的舰载RLG PINS初始对准精度分析

系泊状态下,用Butterworth低通滤波器解决舰载RLG PINS初始对准中杆臂效应问题时,对准的精度受安装误差、杆臂长度和舰船摇摆等因素的影响。通过仿真分析,认为Butterworth低通滤波器适于解决风浪干扰下的舰载平台系统初始对准中的杆臂效应问题,且安装误差、安装位置是影响对准精度的主要因素,提高系统标定精度,并尽量使系统安装在船体对称面内,可以提高对准精度。     

论图书馆员服务的真善美价值

图书馆员服务需要真、善、美,服务价值是真、善、美的统一,也是图书馆员服务的升华。     

SVM在空中目标威胁值评估中的应用

构建了基于回归型支持向量机的空中目标威胁值评估模型,确定了基于粗糙集理论的空中目标威胁因素,并建立了数据离散化、归一化的标准。将常用的4种核函数应用于对空中目标威胁值的估计,并通过基于网格法和遗传算法的搜索方法找到模型的最优参数。最后通过Matlab对算例进行了仿真验证。     

基于效用函数的打击目标选择方法

针对打击目标选择问题,提出了一种基于效用函数的打击目标选择方法,根据效用函数理论和方法,对单个打击目标的价值进行了量化,对多元目标价值函数进行了构造,通过实例分析,说明该方法的有效性和合理性,从而为解决打击目标价值度量问题提供了一种新途径。     

Scheduling a production–distribution system to optimize the tradeoff between delivery tardiness and distribution cost

We consider a make‐to‐order production–distribution system with one supplier and one or more customers. A set of orders with due dates needs to be processed by the supplier and delivered to the customers upon completion. The supplier can process one order at a time without preemption. Each customer is at a distinct location and only orders from the same customer can be batched together for delivery. Each delivery shipment has a capacity limit and incurs a distribution cost. The problem is to find a joint schedule of order processing at the supplier and order delivery from the supplier to the customers that optimizes an objective function involving the maximum delivery tardiness and the total distribution cost. We first study the solvability of various cases of the problem by either providing an efficient algorithm or proving the intractability of the problem. We then develop a fast heuristic for the general problem. We show that the heuristic is asymptotically optimal as the number of orders goes to infinity. We also evaluate the performance of the heuristic computationally by using lower bounds obtained by a column generation approach. Our results indicate that the heuristic is capable of generating near optimal solutions quickly. Finally, we study the value of production–distribution integration by comparing our integrated approach with two sequential approaches where scheduling decisions for order processing are made first, followed by order delivery decisions, with no or only partial integration of the two decisions. We show that in many cases, the integrated approach performs significantly better than the sequential approaches. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005     

高原卫士奉献精神的哲学反思

立足推进人类社会精神文明建设和加强部队思想建设,把高原卫士作为认识对象,运用马克思认识论和实践观,分析高原卫士在特殊环境里所具备的那种高尚品格和生命价值观。在阐述高原卫士奉献精神本质、内涵,及其实践效果的基础上,追问奉献精神产生的双重根源,指出:高原卫士可贵之处是奉献,人类文明需要可贵的奉献精神。     

提高企业信用的经济价值认识,加强企业信用建设

现代市场经济是信用经济,而企业信用是其中最重要的组成部分,由于我国企业缺乏对企业信用经济价值的充分认识,企业信用严重缺失,严重制约了企业经济发展。提高企业对企业信用经济价值的认识,加强企业信用建设,才能适应经济发展的需要,提高企业竞争能力。     

低频UWBSAR辐射校准模型

低频超宽带合成孔径雷达(Ultra Wide Band Synthetic Aperture Radar,UWBSAR)的辐射校准是系统研制和应用过程中必须面对的课题。低频UWBSAR的特点使得常规SAR辐射校准技术不再适用。充分考虑校准参数随频率和方位角的变化,给出适合该系统的辐射校准方法,得到低频UWBSAR图像辐射校准模型。利用该模型,对系统辐射校准误差进行了分析。     

先秦儒家荣辱观及其当代价值

以孔子、孟子、荀子为代表的先秦儒家的荣辱观,以“仁”为基础、以“义”为标准,闪耀着真理性的理论光芒。“八荣八耻”社会主义荣辱观,作为构建和谐社会的道德支撑,体现的就是先秦儒家荣辱观和当今时代精神的完美结合。