我国实现全面小康的电力需求

对电力需求发展的主要因素进行分析，结合能源研究所进行的我国能源发展情景的研究，评价我国电力需求预测情景的可能趋势，提出要用新的发展观看待实现全面小康的电力需求的建议。     

如何使用补偿式微压计进行压力检测

如何将补偿式微压计高度值换算成压力量值进行压力检测。     

基于价值工程的施工管理技术创新

价值工程作为一门新兴管理技术，自20世纪40年代后期产生以来，已被大量运用于生产管理活动之中，特别是在工程建设领域得到广泛的运用，积累了丰富的经验。文章正是以价值工程理论为基础，着重探讨了其在施工管理过程中的应用，以求进一步推动我国施工管理技术的创新和发展。     

维氏硬度曲面修正系数的计算机拟合

根据GB／T 4340．1-1999所附的各类曲面维氏硬度修正系数表，基于多项式拟合技术，给出了曲面维氏硬度修正系数关于压痕对角线长度与曲面直径比值的解析函数表达式，并对维氏硬度值的修约规律进行了总结。     

A three-dimensional model describing stress-temperature induced solid phase transformations: thermomechanical coupling and hybrid composite applications

Between composite materials, shape memory alloy (SMA) composites are having a more and more relevant role. Typically, SMA wires are embedded in a metallic or a polymeric matrix to obtain materials with native multi-functionality and adaptive properties. This work approaches the computational study of the mechanical response of a composite in which SMA wires, previously deformed, are activated by electrical current heating, and accordingly try to recover the original shape inducing a shape change or a prestress in the structure. In particular, since the SMA behaviour is strongly affected by the thermo-mechanical coupling, in the first part of this work we present a 3D phenomenological model able to take into account this aspect. The model time-discrete counterpart is used to develop a 3D solid finite element able to describe the thermo-electro-mechanical coupled problem due to shape memory alloy response and to Joule effect. Finally, in the second part of the paper, we employ the developed computational tool to simulate different feasible SMA composite applications. Copyright © 2004 John Wiley & Sons, Ltd.     

Numerical solution of second‐order,two‐point boundary value problems using continuous genetic algorithms

Second‐order, two‐point boundary‐value problems are encountered in many engineering applications including the study of beam deflections, heat flow, and various dynamic systems. Two classical numerical techniques are widely used in the engineering community for the solution of such problems; the shooting method and finite difference method. These methods are suited for linear problems. However, when solving the non‐linear problems, these methods require some major modifications that include the use of some root‐finding technique. Furthermore, they require the use of other basic numerical techniques in order to obtain the solution. In this paper, the author introduces a novel method based on continuous genetic algorithms for numerically approximating a solution to this problem. The new method has the following characteristics; first, it does not require any modification while switching from the linear to the non‐linear case; as a result, it is of versatile nature. Second, this approach does not resort to more advanced mathematical tools and is thus easily accepted in the engineering application field. Third, the proposed methodology has an implicit parallel nature which points to its implementation on parallel machines. However, being a variant of the finite difference scheme with truncation error of the order O(h²), the method provides solutions with moderate accuracy. Numerical examples presented in the paper illustrate the applicability and generality of the proposed method. Copyright © 2004 John Wiley & Sons, Ltd.     

LEC SI-GaAs中AB微缺陷和它对MESFET跨导性能的影响

用AB腐蚀液对SI GaAs晶片进行AB微缺陷显示 (AB微缺陷密度AB EPD :10 3～ 10 4 cm- 2 量级 ) ,用KOH腐蚀液显示位错 (位错密度EPD :10 4cm- 2 量级 ) ,发现衬底上的位错对器件跨导没有明显的影响 ,而用AB腐蚀液显示的AB微缺陷对器件性能及均匀性有明确的影响 :低AB EPD的片子跨导大 ;高AB EPD的片子跨导小。AB EPD有一临界值 ,当AB EPD高于此值时 ,跨导陡然下降。另外 ,还利用扫描光致发光光谱 (PLmapping)对衬底进行了测量 ,得出了与上述结果相符的结果。     

燃用低中热值煤气的燃气轮机机组结构特性及运行维护要点

简要介绍了燃气轮机发电技术的最新进展情况，分析了钢铁企业建设燃气-蒸汽联合循环发电机组以高效回收和利用钢铁企业煤气资源问题的背景，探讨了燃烧低中热值煤气的燃气轮机机组结构特性及运行维护要点。     

冶金企业需求管理多维数据模型

在冶金企业供应链管理流程创新过程中 ,为了提高用户满意度和计划精度 ,必须建立需求管理的多维数据分析平台。本文介绍了E R关系模型和多维数据模型的一些基本概念 ,着重介绍了需求管理的多维数据模型设计。     

同步任意值计数器的设计

多值计数器的设计与二值计数器的设计不相同，因为一般多值触发器本身并不具有多值计数功能，所以多值计数器的设计首先要解决如何实现一位多值计数器的计数问题；另外要解决如何实现多位计数器的低位向高位的进位问题．此外，还介绍了几种具有代表性的四值计数器的设计，其方法可适用于任意值计数器的设计．