Model experiment on anti-deformation performance of a self-supporting transmission tower in a subsidence area

A large number of high-voltage power transmission towers have recently been constructed in mining areas prone to subsidence.In order to ensure the safety of the transmission towers and the safe operati...     

一种改进的多机器人协作实时FastSLAM算法

针对FastSLAM1.0中机器人缺乏自身定位测量修正引起的累积误差和FastSLAM2.0引入测量修正引起算法复杂度增加的问题,提出一种改进的基于辅助测量的多机器人协作实时FastSLAM算法,使用双机器人协同工作,领头机器人负责完成同时定位与地图构建任务,辅助机器人通过静态相对位置测量为领头机器人提供实时定位测量修正.该辅助测量方法不仅为SLAM任务执行机器人提供较准确的定位测量值,同时也避免了FastSLAM2.0算法中额外的算法复杂度问题.实验结果表明算法既可以获得较高的精度,而且方便可行,具有较高实用价值.     

硫酸亚铁与硫酸亚铁铵溶液不稳定性初探

本文探讨了硫酸亚铁与硫酸亚铁铵在酸性介质中，溶液不稳定性机理，并提出了不稳定性的改进办法。     

Effects of Ti on N distribution and diffusion in FeTiN thin films

We studied the distribution and diffusion of N atoms in FeTiN single-layer and bilayer thin films by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). We found that in as-deposited films N atoms are first absorbed by Ti atoms, the rest being dissolved into FeTi lattices. Ti not only directly absorbs N by chemical bonding, but also decreases the energy of the N atoms that are dissolved into FeTi lattices. The diffusion study of N atoms in single layer and bilayer films showed that although the presence of Ti stabilized the /spl alpha/ phase of FeTi lattices during 200/spl deg/C annealing, the diffusion length of dissolved N in FeTi (Ti/spl les/8 at.%) lattices was still comparable to the diffusion length of N in pure Fe. Thus, the addition of a small amount of Ti in /spl alpha/-Fe lattice can not completely stabilize N atoms in the film, and the induced magnetic anisotropy of the films can still be unstable, although the /spl alpha/ phase of FeTiN is stabilized by the addition of Ti. The distribution of N atoms in bilayer films can be fitted by a simple enthalpy model.     

Digital Manufacture Techniques for Large Hydro Turbine's Blades

Blades are one of the vital components and most difficulty in manufacturing of large hydro turbines.In order to cost-effectively and productively manufacture these kinds of blades,a series of digital techniques in manufacturing have been devel- oped,which includes digital design of hydro turbine blades based on manufacture' requirements,Computer-aided location and the machined error evaluation by using 3-dimensional digitized measuring,tool path generation strategy to meet requirements of en- hancing machining efficiency and controlling deviation in NC machining,tool path generation and NC machining simulation by es- tablishing a virtual NC machining environment for blades,and reasonable and feasible strategy and the systematic scheme for man- ufacturing of large blades by using 5-axis simultaneous CNC machining.The developed digital manufacture techniques have been successfully applied in manufacturing of both the large Kaplan and Francis hydraulic turbine blades;it shows that higher efficiency and the better surfaces finish accuracy can be achieved.     

短消息服务提供商系统的研究与实现

短信服务（SMS）在通信产业中正在占据越来越重要的位置。文章介绍了中国网通SMS短信服务提供商（SP）与中国网通短信中心（SMSC）以及用户手机终端之间的数据交互原理，给出了SP提供商的短信增值业务运营平台的设计原理及实现方法。该平台已投入使用，并取得了良好的效果。     

一种基于带缓存crossbar的优先级排队机制及其调度算法

基于带缓存crossbar的交换结构提出了一种支持多优先级的调度方案.该方案在带缓存crossbar交换结构的输入端口提出了一种基于端口与优先级标识的层次化排队机制,并结合该排队机制提出了一种加权双轮询(DWRR)的调度算法,在crossbar内部交叉节点处的缓存队列提出了一种易于实现的补偿优先轮询(CPRR)调度算法.这种DWRR-CPRR优先级调度方案不需要在crossbar交叉节点设置多个优先级缓存队列,避免了在带缓存crossbar内部进行复杂的调度,实现简单.时延特性与带宽分配特性的仿真结果表明,该方案可以获得接近于采用加权公平排队(WFQ)调度策略的OQ交换结构的性能.     

近场热记录系统热响应过程的分子动力学仿真

采用非平衡态分子动力学(NEMD)仿真了近场热记录系统的热响应过程.对探针施加不同的作用力时,随着作用力的增加,基体的热响应明显加快,系统达到热平衡所需时间相应减少,可有效提高热机械数据存储速率.采用数值差分方法对一维探针-基体的传热模型进行数值求解,数值解和分子动力学模拟结果总体趋势基本吻合.     

Web应用中的面向对象模型与设计模式

介绍了Web应用中的面向对象模型及其基于XML的建模语言OOWML。它为实现Web应用开发从设计到实现的平滑过渡、提高Web应用的可重用性、开发出高质量的Web应用提供了基础。然后展示了如何在此模型中应用设计模式改善Web应用的设计。     

水泵的变压变流量的自动控制

提供了城市供水水泵的变压变流量自动控制方法，成功地解决了水源地和地区加压站昼夜之间水流量和水压变化大、难以控制的问题。实现了按需供应的最佳供水方式，大幅度地降低了耗电量，节约了水源，减轻了城市自来水管道的压力。同时也为油泵供油、风机送风等提供了一种可借鉴的控制方法。