电子商务环境下的组织变革探讨

从变化的环境出发，论述了组织与环境的关系，分析了电子商务在组织变革中的作用以及组织变革的规律，进一步研究了适应这种环境的虚拟组织的组成、管理特性和运作平台。     

静态电子轨道衡组成部分解析及其合理选择

阐述静态电子轨道衡诸多优点;工作原理、允许误差及误差分配;轨道衡的结构组成部分、解析各部分的工作特性及技术指标要求;合理选配及推荐实例.     

Superconductivity and Structure

The degree of the isolation of the CuO₂ planes (e.g. distance or bond valence to the apical coordination) has been shown by quantitative algorithms to be the major factor in determining aspects of the doping curves. They include the magnitude of the optimal number of doped holes (h_op) and the corresponding T _cop. It is shown that the roots of these phenomenological laws lie in a related structural dependence of super-exchange. The latter is expressed in the pseudo-gap or Neel temperature of the undoped parent compound. A fruitful language can be developed which deals with a buildup of complex quantum chemical features by bringing two holes into vicinity of a super-exchange O, forming a “local” Cu₂O₇ pair. Structural considerations also dictate that stress is relieved by alternate orthogonal pair orientation. This leads to plaid patterns with primary and secondary channels of charge. The presence of these two types of charge channels is involved in the mechanism of superconducting charge transport. Similar structuring of doped charge into plaid patterns of “local” pairs has been proposed for “all” high T _c superconductivity. STM now gives pictorial representation of the remnants of such an electronic crystal structure. The response of these bond-ordering motifs to structural details is further discussed. These ideas supply organization to the manifold experimental situation and provide opportunities for a unifying theory for high T _c superconductivity in terms of real space structuring of “local” pairs, largely on crystal-chemical principles.     

有色金属行业信息化述评

通过大量调查资料 ,分析有色金属行业信息化建设的现状、存在的差距和问题 ,探讨了有色信息化建设面临的形势和要求、方向和任务。     

对MERRICK465型输煤数字电子皮带秤的几点改进

对我国目前用量较大的465刑数字电子皮带秤用于大规模工业煤气生产中的输煤道这一特殊环境中的精密自动化计量系统的故障现象,以及引发故障的原因和改进排除方案进行了初步探讨,并取得一定成效,对于相关工作有一定参考作用。     

有限转角无刷力矩电动机位置伺服系统的电流控制

提出了有限转角无刷力矩电动机 (LABLTM)位置伺服系统电流控制策略 ,给出了实施方法 ,进行了开关管频率特性的分析。该方法可实现在不同误差时自动调节电动机电流 ,进而控制输出转矩 ,并具有稳态精度高、动态响应快等特点。     

电分标准工作曲线的推导与实践研究

本文根据人眼视觉特性、孟塞尔方程及彩色复制理论,并结合实际工艺路线和工艺条件,推导出标准阶调复制曲线和标准电分工作曲线。它与德国Hell公司所绘的电分标准工作曲线基本一致。并做到了各工序有数据,有质量标准,使平印制版做到有规可循。     

Microclusters as superatoms for developing new materials

With the discovery of solid C₆₀, efforts are being made to develop new clusters and molecules which could be assembled to form new materials. Here we present some recent developments in this direction and discuss bonding in such materials.     

基于移位原理的顺序控制器研究

本文根据PLC顺序控制程序的设计思路,阐述了用常用集成数码移位寄存器、电力电子开关电路和少量外围电子元件构成移位控制器的原理,根据此设计思路制作的移位控制器经过在实验室环境下运行,证明了设计方案的可行性。     

基于WebGIS的粗泥沙集中来源区电子地图系统研究

基于WebGIS的粗泥沙集中来源区电子地图系统建设，以粗泥沙集中来源区作为研究区域，以黄河中游粗泥沙集中来源区水土保持工作流程（包括规划设计、计划管理、综合治理、预防监督和淤地坝管理等）为主线，依托黄河流域水土保持生态与环境监测系统网络、黄河流域水土保持监测系统数据库，建立覆盖黄河流域、黄土高原区、多沙粗沙区、粗泥沙集中来源区，面向不同水土保持管理层的水土保持监测与管理信息系统。