消防给水系统设计压力与检测压力探析

由于设计工作状态是按照火场最不利情况考虑,计算水头损失比实际水头损失大,水泵选型扬程偏高,满足设计规范的消防给水系统施工完成后,检测时的实际压力值与设计压力值相比偏大。为此,室内消火栓减压稳压消火栓的设置楼层可适当增加,选用可调式无后坐力多功能消防水枪。     

论传统军事法律文化在培育当代军人法治理念中的实践价值

中国传统军事法律文化是在数千年军事法律实践中形成的,其独特的法律品格对培育古代军人“以礼治军”的宗法理念、维护军队的统一稳定起到了重要作用。年轻军人法律信仰和服从意识的缺失是值得重视和深思的问题。因此,用优秀传统军事法律文化培育当代军人法律信仰、强化当代军人国防意识、增强当代军人自律素质,都具有十分重要的实践价值。     

浅谈高校无机化学实验教学的绿色化

针对在化学实验教学中因大量污染物的排放可能对师生健康和环境造成严重危害的实际,就如何进行绿色化学实验教学这一问题,文章提出了学生开展无机化学实验废液的处理实验、进行实验微型化教学以及实验应多采用仪器法等方法,在高校化学实验教学中渗透绿色化学教学思想是必要的,也是可行的。化学教师应该用绿色化学的理念指导化学实验教学,培养具有绿色意识的化学人才,实现化学实验教学的绿色化。     

金字塔渐进融合低照度图像增强网络

针对现有低照度图像增强网络对不同尺度特征信息存在感知与表达能力不足的问题,提出金字塔渐进融合低照度图像增强网络模型。网络对图像进行多次下采样操作以组成特征金字塔,通过在特征金字塔的三个不同分支上加入跳跃连接,将不同尺度的特征图进行相互融合。通过精细恢复模块进一步提取精炼信息,将特征图恢复到正常的光照图像。结果表明,该网络模型不但能有效地提升低照度图像的整体亮度,而且能很好地保持图像中的细节信息和清晰的物体边缘轮廓,同时能够有效地抑制图像中的暗部噪声,使增强后的图像整体画面真实自然。     

Steady-state analysis of load balancing with Coxian-2 distributed service times

This paper studies load balancing for many-server (N servers) systems. Each server has a buffer of size b ? 1, and can have at most one job in service and b ? 1 jobs in the buffer. The service time of a job follows the Coxian-2 distribution. We focus on steady-state performance of load balancing policies in the heavy traffic regime such that the normalized load of system is λ = 1 ? N^?α for 0 < α < 0.5. We identify a set of policies that achieve asymptotic zero waiting. The set of policies include several classical policies such as join-the-shortest-queue (JSQ), join-the-idle-queue (JIQ), idle-one-first (I1F) and power-of-d-choices (Po d) with d = O(N^α log N). The proof of the main result is based on Stein's method and state space collapse. A key technical contribution of this paper is the iterative state space collapse approach that leads to a simple generator approximation when applying Stein's method.     

预警机雷达在协同空战中的多目标探测

预警机指挥下的多机协同攻防系统,利用预警机的高空机载雷达和强大的通讯导航系统有效地提高了多机攻防系统的防空预警能力和综合指挥作战能力。对该系统进行了理论框架分析,给出了其整个工作过程的各个功能模块的模型,并针对预警机的雷达探测能力进行了对多组目标实时探测跟踪的仿真计算。     

手性吸波混凝土电磁屏蔽性能实验研究

综述了手性吸波的研究现状。在实验中进行了手性吸波混凝土的制备,测试了实验样品的电磁屏蔽性能。结果表明,手性吸波模型是混凝土吸波的完整理论,对混凝土的高吸波性能、高屏蔽性能、宽频性能的研究提供了理论基础,为先进吸波混凝土的研制开辟了新途径。     

利用矩阵求极大相容类的一种方法

寻找相容关系的极大相容类和简单图的极大完全子图，在解决二元关系与数据挖掘和管理决策中的具体问题时有重要作用。利用相容关系的极大相容类与简单图的极大完全子图之间的对应关系，对极大完全子图的路径长度进行分析，得到了关于极大完全子图路径长度的一个定理。并根据该定理构造了一个用矩阵的路径长度搜索简单图的极大完全子图的方法，进而利用该方法找出了对应相容关系的极大相容类。     

Inventory sharing under decentralized preventive transshipments

We consider preventive transshipments between two stores in a decentralized system with two demand subperiods. Replenishment orders are made before the first subperiod, and the stores may make transshipments to one another between the subperiods. We prove that the transshipment decision has a dominant strategy, called a control‐band conserving transfer policy, under which each store chooses a quantity to transship in or out that will keep its second‐subperiod starting inventory level within a range called a control band. We prove that the optimal replenishment policy is a threshold policy in which the threshold depends on the capacity level at the other store. Finally, we prove that there does not exist a transfer price that coordinates the decentralized supply chain. Our research also explains many of the differences between preventive and emergency transshipments, including differences in the optimal transfer policies and the existence or nonexistence of transfer prices that coordinate the system. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010