高合金不锈钢在降膜板式蒸发器上的应用

外流降膜板式蒸发器作为替代列管式蒸发器的新设备应用于氧化铝行业,其板片材质处于一个摸索选择的过程。本文就高合金不锈钢板片的失败事例进行分析,通过试验、试用,最终找到较为理想的材质。     

System identification using almost periodic functions: application to non-linearities with memory

A method for measuring by crosscorrelation the impulse responses of the linear portions of a system containing a zero-memory non-linearity is shown to be applicable to certain typos of non-linear characteristic with memory. Several situations are analysed and some experimental results presented. A computer programme is given for calculating the parameters of the input signal from a given tabulated non-linear characteristic.     

Dyadic output feedback laws generated as Kronecker products : optimal and suboptimal solutions

The problem of eigenvalue assignment in the system dx/dt equals; Ax + Bu, y = Dx, using the dyadic output feedback law u = u₀ + q · p^Ty is considered via a formulation developed earlier by the author, in which p and q occur in the Kronecker product vector p?q. The equations governing the values of p and q which give an optimum approximation to a prescribed spectrum of eigenvalues are derived, and a special case is solved. Various facets of the problem of generating suboptimal solutions are discussed.     

技术改造项目的技术经济评价方法

分析比较了技术改造项目的经济评价的计算方法，利用“有无比较法”计算增量净收益，是技术改造项目经济效益计算的有效方法。     

铁谱技术及综合诊断技术的应用

介绍了铁谱技术在设备工监测中的应用及主要监测原理，针对应用实践中存在的问题，对多种监测技术相结合的综合诊断方法进行了探讨。     

智能配电网自动化技术研究及实施

本文以智能配电网自动化系统为背景,对智能配电网自动化系统的内容、功能和整体结构进行了说明,并从近年来各地区配电网的实际运行情况出发,分析和总结影响配电网安全运行的主要因素,研究和论证配电网发展领域实现自动化的重要组成部分——用户分界开关成套设备,并对设备中采用的"看门狗"技术进行了详细的介绍及应用描述,针对如何在现有配电网络基础上完善配电网管理模式和管理手段的问题,提出了从根本上提高配电网科学化管理水平的全面解决方案。分界开关在10kV馈电架空线路和地缆网线路上的应用,可大幅度减少无故障线路的连带性事故停电,缩小故障停电范围和用户停电时间,从而提高用户的供电可靠性,产生极大的经济和社会效益。     

An integral equation approach for the analysisof current density distribution controlledby diffusion, convection and migration

The present work describes novel numerical formulations based on integral equations for calculating steady-state distributions of concentration, potential and current density in two-dimensional multiple-ion electrochemical systems involving diffusion, convection and migration effects. For simplicity, the electrolyte solutions are considered to be dilute and at a constant temperature. Numerical procedures using the boundary element method (BEM) have been developed specifically for the problem, and are briefly described in the text. The accuracy and efficiency of these procedures are assessed with several tests, involving binary and three-ion systems, linear and non-linear boundary conditions, and problems that are either diffusion- or convection-dominated, or both.     

Stability problems in using state variable feedback to produce a servomechanism of specified type number

The problem of constructing a Hurwitz polynomial Â( s) of degree n, under the condition that the coefficients up to and including that of 8^m?1 are given, is discussed, Root locus arguments are used to establish necessary and sufficient conditions for stabilizability with m = l, 2, 3 and sufficient conditions for m > 3. A Routh array approach yields necessary and sufficient conditions for m = 4 and a general method of attack for m > 4 The origin of the problem (in the design of tracking servo-mechanisms) is explained, and a procedure for producing a system with specified type number is outlined.     

矿山CAN总线数据采集系统的设计

介绍CAN总线数据采集系统的设计及CAN总线特点，阐述CAN通信节点的组成和通信原理；该系统在工业现场收到了预期的效果。