CSP辊底式加热炉温度控制分析

分析了CSP辊底式加热炉温度控制的特点,指出影响坯料温度的因素、温度变化状况;对影响板坯加热的主要技术因素进行了初步研究,并介绍了该炉型板坯温度的控制方法与经验。     

新华钼业公司通风系统改造及两翼对角式通风的应用

对新华钼业公司通风系统的现状及改造方案、改造原则进行详细叙述。运用独立风桥解决围绕矿山井下通风工作中的难题。     

球式热风炉在高炉锰铁冶炼中的应用

介绍了信钢铁合金厂新建的3^#锰铁高炉球式热风炉结构及与内燃式热风炉的比较，分析了其在高炉锰铁冶炼中应用的优越性。     

大跨斜拉网格结构耦合风振响应分析计算的研究现状与发展前景

大跨斜拉网格结构是网格结构、塔住和拉索组合的刚柔体系,有广泛的应用前景。风激动力响应是其设 计计算中的一个关键问题。大跨斜拉网格结构在风荷载的作用下具有非线性特征,其风激响应是复杂的耦合响应。大 跨斜拉网格结构风载响应研究是亟需解决的问题。在介绍风荷载特性、风对结构作用和风荷载模拟技术基础上,阐述了 结构风工程中大跨斜拉网格结构研究的状况,展望该领域研究的前景。     

沉管隧道地震响应的三维非线性数值模拟方法及应用

介绍了沉管隧道的传统抗震分析方法,针对上海某沉管越江隧道的非线性地震响应问题,提出了基于显式有限元和高性能计算上的大规模数值模拟仿真方法。建立了包括地基土、沉管隧道以及柔性接头在内的全三维分析模型,单元数和节点数均超过百万。充分考虑到土壤、橡胶等多个对象的材料非线性,以及土体-沉管间、柔性接头-管段间的接触非线性因素,最后利用动态显示算法及其关键技术进行了基于高性能计算机的大规模地震响应分析。计算结果描述了地基土-沉管隧道体系在地震荷载作用下的相互作用和整体变形,同时对沉管及柔性接头等关键部位进行了深入分析,从而为沉管隧道的抗震设计研究提供参考。     

浅析计算机辅助隧道施工图设计及其信息管理系统的开发

本文按用户至上的原则,采用结构化、模块化的设计方法,自顶向下对系统进行了全面分析,论述了计算机辅助隧道施工图设计及其信息管理系统的开发环境、主导思想、数据结构、信息流程、结构功能模块及程序实现过程等。     

Magnetization Reversal by Electrical Spin Injection in Ferromagnetic (Ga,Mn)As-Based Magnetic Tunnel Junctions

We report current-induced magnetization reversal in a ferromagnetic semiconductor-based magnetic tunnel junction (Ga,Mn)As/AlAs/(Ga,Mn)As prepared by molecular beam epitaxy on a p-GaAs(001) substrate. A change in magneto-resistance that is asymmetric with respect to the current direction is found with the excitation current of 10⁶ A/cm². Contributions of both unpolarized and spin-polarized components are examined, and we conclude that the partial magnetization reversal occurs in the (Ga,Mn)As layer having smaller magnetization with the spin-polarized tunneling current of 10⁵ A/cm².     

Obliging Institutions and Industry Evolution: A Comparative Study of the German and UK Wind Energy Industries

This paper firstly examines the relationship between state coordination and wind energy growth by comparing the differences between UK and German institutional configurations and state involvements in the 1990s. While the EU was calling for a unified regulatory framework for its member states, the UK and Germany adopted very different renewable energy policies. The evidence of the early 1990s shows that the British government employed “deregulation” with so limited state involvement that wind energy project developers faced thorny development problems, while the German government tried to require the electricity supply industry to purchase expensive wind power by “regulation” but encountered formidable resistance. Nevertheless, both the British and German administrations later could resolve these problems through new forms of state power. This suggests that, firstly, neither “deregulation” nor “regulation” is an effective means to develop wind power with increasing electricity liberalization and regionalization. Secondly, “obliging” regulations and state powers are vital to the policy outcome by harnessing the state's institutional capacity to smooth out technology innovation and diffusion.     

采用热敏电阻器研制风速传感器的设计

介绍了采用负温度系数热敏电阻器为检测元件的风速传感器的测量原理;阐述了风速/电压转换理论、风速测量电路;分析了测量误差。实验测试结果表明:这种风速传感器的各项性能指标均达到设计要求。     

热电偶式风速传感器的非线性动态调校

介绍了以热电偶为检测器件的风速传感器的测量原理,在分析其输出特性的基础上,阐述了一种人工神经网络模型———Adaline模型的网络学习,逼近非线性函数的方法,利用神经网络对风速传感器的非线性进行校正,大大提高了风速的检测精度。