浅析深层搅拌桩的材料使用

本文就深层搅拌桩施工材料使用存在的一些问题进行分析总结。     

变压器设备电厂标识系统的KKS代码探讨

随着世界经济的发展和我国电力科学技术的进步，电力行业的国际贸易和技术交流日益频繁，市场竞争越来越激烈，企业生产的产品应以满足顾客要求为宗旨，企业应有随着市场形势的变化和顾客需求的改变而及时应变的能力，只有这样才能顺应市场，抢占市场，提高企业的市场竞争力，使企业不断发展壮大。     

防雷装置检测业务系统的研制

本文分析了防雷装置检测业务流程,详细介绍了根据这个业务流程开发的防雷装置检测业务软件系统.     

防雷装置检测业务的规范化工作思考与研究

本文在防雷装置检测业务系统及业务参考规程研究的基础上,分析了当前业务工作规范化过程中存在的问题及解决思路.     

Synthesis of anisotropic NaNbO<Subscript>3</Subscript> seed crystals and fabrication of textured (K<Subscript>0.5</Subscript>Na<Subscript>0.5</Subscript>)NbO<Subscript>3</Subscript>-based ceramics

High aspect ratio patelike NaNbO₃ particles with pure perovskite structure have been successfully synthesized by topochemical microcrystal conversion (TMC) from plate-like precursor particles of the layer-structured Bi_2.5Na_3.5Nb₅O₁₈. By changing the Bi_2.5Na_3.5Nb₅O₁₈/Na₂CO₃ ratio, large and thin NaNbO₃ particles with a thickness of approximately 0.5 μm and a width of approximately 20 μm were obtained. The obtained NaNbO₃ particles is quite suitable for fabricating textured (K_0.5Na_0.5)NbO₃-based ceramics. Using the fine platelike NaNbO₃ particles as templates, dense <001> -oriented (K_0.5Na_0.5)NbO₃-0.5 mol %MnO₂ ceramics with high texture quality (Lotgering factor F ₀₀₁ = 87 %) and excellent piezoelectric properties were produced by templated grain growth. Compared with randomly oriented ceramics, textured samples show greatly enhanced properties. The room-temperature strain S, the piezoelectric coefficient d ₃₃ ^* and d ₃₃ reach up to 0.093 %, 233 pm/V and 195pC/N, respectively, which are all about 1.5 times larger than those of non-textured ceramics.     

Observer-based consensus in networks of discrete-time switched linear dynamics under a fixed topology

This paper considers the consensus problem of discrete-time switched linear multi-agent systems under a fixed communication topology. An observer-based protocol with sampled data is proposed for solving such a problem. Assume that the digraph has a directed spanning tree and that all switched subsystem of each agent are stabilisable and detectable. It is shown that the proposed protocol solves the consensus problem when the sampling period is sufficiently small and the average dwell time of the switching signal is sufficiently large. Moreover, to reduce the conservatism, a sufficient condition for consensus is obtained to design the feedback gain matrices and the observer gain matrices by linear matrix inequalities, which guarantee that consensus can be achieved when the sampling period and the average dwell time are in the general case. Finally, the effectiveness of the theoretical results is demonstrated through an example.     

Effects of hydrogen on mechanical properties and fracture mechanism of 8090 Al-Li alloy

The effects of hydrogen and strain rate on the mechanical properties and fracture mechanism of 8090 Al-Li alloy under electrochemical charging conditions have been studied. Experimental results demonstrate that the tensile strength [ultimate tensile strength (UTS) and yield strength (YS)] and plasticity [reduction of area (RA) and elongation (EL)] drop linearly with the decrease of strain rate. The charged hydrogen increases the tensile strength but markedly impair the plasticity. The susceptibility of hydrogen embrittlement increases with the decreases of strain rate, and the susceptibility of the charged specimens was larger than that of the uncharged ones over the strain-rate range. Observation by scanning electron microscope (SEM) reveals that the charged hydrogen enhances intergranular delamination cracking on the fracture surface. The fracture model of charged specimens at low strain rates is grain boundary brittle fracture (GBBF), while that of other conditions is grain boundary ductile fracture (GBDF). Secondary ion mass spectroscopy (SIMS) study shows that the atomic binding energy of Al and Li in the alloy decreased after hydrogen charging, and the atomic binding energy drop of the former is more than the latter. In this article, the hydrogen transport through the mobile dislocation mechanism of hydrogen-induced fracture and the hydrogen effect on atomic binding energy were also discussed in detail.     

LG-2/130型管道式旋转喷射泵的研制

介绍了旋转喷射泵的原理、结构特点和设计计算，以及LG-2／130型旋喷泵的研制和应用等情况。     

基于CDMA／CAN的车辆故障远程监控系统

为解决汽车在行驶过程中的实时故障诊断问题，基于CDMA、CAN总线技术，建立了车辆信息技术服务中心车辆故障诊断专家系统和车载故障诊断系统，实现了车辆的远程、实时、智能故障诊断，并町提供安全、客户关系管理等服务。本系统将嵌入式技术、无线通信技术融合到车辆中，代表了下一代交通工具信息技术应用的发展方向。     

烟叶发酵过程温湿度实时控制系统

自行设计的烟叶发酵温湿度实时控制，是采用ＤＤＺ—Ⅱ系列仪表与单台工控机组成的自动控制系统。一台微机完成分布式上下位机２４路子系统的调节、参数修改、打印等任务，在软件的设计方面分前后台的工作方式。