回转器基本特性分析及其实现方法

在有源RC网络综合中,常用电阻、电容和运算放大器的综合。电路微型化的趋势和固件的出现,导致使用回转器和理想变压器而不使用电感来进行综合。在分析了回转器原理及其基本特性的基础上,用回转器模拟浮地电感或接地电感,以及用模拟电感来实现二阶带通与低通电路。并研讨了用运算放大器与负电阻来实现回转器网络的方法。     

网络编码在拓扑推断中的应用研究

针对现有的基于线性网络编码的网络拓扑推断算法中拓扑错误推断率较高、节点资源消耗大等问题,提出了一种改进的网络拓扑推断解决方案。在无链路丢包的情况下,提出了组合包测量方法,不仅适合二叉树类型的网络,也适合于存在节点度数大于3的中间节点的树状网络拓扑;在存在链路丢包的情况下,提出了快速发包算法,避免了网络中间节点和探测包帧结构设计上的额外开销。仿真结果表明,该算法具有更广泛的适用范围,具有更严谨的推断过程,同时能够在不增加网络节点运行负担的情况下降低错误推断率。     

振动监测与分析技术在核电站中的应用

从保障核全安、提高核电经济运行水平、解决重大技术问题和预测性维修等４个方面介绍了振动监测与分析技术在核电站中的应用,并通过实例说明了振动监测及分析技术在大亚湾核电站安全,稳定,经济运行中所起的重要作用。     

Cutting edge control by monitoring the tapping torque of new and resharpened tapping tools in Inconel 718

In aerospace industry, tapping is the prime choice for hole threading in jet aero-engine turbine components. Taps are not usually resharpened, unlike other     

Preferred Orientations in Iodide Titanium

The wire textures for cold rolled and recrystallized iodide titanium and the sheet textures for this material produced by cold and hot rolling, and recrystallization at a series of temperatures were determined. The effect of the α → β transformation on the sheet texture was noted.     

计算命中目标破片数及其分布的投影球方法

本文提出的计算破片战斗部命中目标破片主其分布的投影球方法具有概念明确、思路清晰、算法相对简单之特点,具有较强的通用性,并可获得足够高的计算精度。该方法在目标毁伤研究方面具有重要的参考价值。     

Tungsten-Cobalt-Carbon System

The phases and equilibria in the W-Co-C system have been studied by X-ray diffraction methods, metallographic technique, and thermal analysis. In addition to the η phase, two double carbides, called θ and κ, have been revealed. The compositions correspond to Co₃W₆C₂ and Co₃-W₁₀C₄. The reactions leading to these phases have been explained and tentative diagrams of stable and metastable equilibria proposed. The basic reactions in sintering cobalt cemented tungsten carbides are discussed.