钢板剪力墙的分类及性能

对钢板剪力墙结构进行分类讨论,分析了墙板本身的力学性能、使用性能以及与框架的相互作用;探讨了内嵌钢板与框架栓接或焊接的典型连接方式,并从制作安装、使用性能和对墙板性能的影响3个方面比较了栓接与焊接的优劣;分析了各类钢板剪力墙的特点和适用范围,为设计人员在工程应用中选择恰当的钢板剪力墙类型提供了参考。     

可重构计算在提高数据采集系统容错中的应用

可重构计算技术在数据采集系统中的应用越来越广泛,这不仅得益于可重构计算技术能够更快的对数据进行处理、降低系统能耗,还得益于其可以提高系统的可靠性。该文介绍了如何利用可重构计算技术,提高数据采集系统的容错能力,使数据采集系统在出现硬件故障时能保持正常工作的能力。     

我国电力产出对经济增长拉动作用的实证分析

运用了单整和协整技术、向量自回归模型、Granger影响关系检验、脉冲响应函数等分析方法,对我国电力产出和国内总产出1970～2007年的水平值(对数变量)时间序列和增长率(同比增长率)时间序列进行了计量研究.研究结果表明我国电力产出与经济增长存在明显的长期协整关系,并且电力产出对国内产出具有"正的贡献";从二者增长率的关系上看,我国电力产出增长率与经济增长率存在明显的正向协同变化过程.     

民间儿童坐具设计研究

人类行为习惯决定了人与坐具有着密切关系,对坐具设计的研究也具有重要意义。常用坐具设计受传统起居方式、礼仪制度的制约有其自身特点,本文选择为特殊群体设计的儿童坐具为研究对象,通过与成人坐具的对比分析,总结归纳出儿童坐具突出实用性、安全性、舒适性、娱乐性的特点。     

打造特色校园文化培育时代优秀人才——以武汉科技学院为例浅谈高校校园文化建设

高校校园文化是高校的校风、学风和办学特色的集中体现,是构建和谐校园的根本,是高校提升办学质量、实现可持续发展的重要推动力。本文从三个方面阐述了加强高校校园文化建设的重要意义,并结合武汉科技学院校园文化建设的实践和经验,对如何在新形势下加强高校校园文化建设,构建和谐校园进行了总结与思考。     

Evolution of carbides and carbon content in matrix of an ultra-high carbon sintered steel during heat treatment process

DTA, thermal expansion, XRD, and SEM were used to evaluate the effect of quenching temperature on the mechanical properties and microstructure of a novel sintered steel Fe-6Co-1Ni-5Cr-5Mo-1C. Lattice parameters and the mass fraction of carbon dissolved in the matrix of the steel quenched were investigated. It is discovered that the hardness of the steel increases with quench-ing temperature in the range of 840-900℃ and remains constant in the range of 900 to 1100℃. It decreases rapidly when the tem-perature is higher than 1100℃. The mass fraction of carbon dissolved in the matrix of the steel quenched at 840℃ is 0.38, but when the quenching temperature is increased to 1150℃, it increases to 0.98. The carbides formed during sintering are still present at grain boundaries and in the matrix of the steel quenched at low quenching temperatures, such as 840℃. When the quenching temperature is increased to 1150℃, most of the carbides at grain boundaries are dissolved with just a small amount of spherical M23C6 existing in the matrix of the quenched steel.     

Prevention of rockburst by guide holes based on numerical simulations

We studied variations in the stress field around guide holes drilled during tunnel excavation to understand the mechanical mechanism by which these holes help prevent rockburst. The study used elasto-plastic analysis of a circular chamber under non-axisymmetrical loads. The results showed that the unloading of in-situ stresses, and the forming of a secondary stress field, leads to a severe change in the stress field around the guide holes. This causes the formation of an X-shaped area of plastic deformation, which prevents the rockburst. Adopting a sub-model finite dement technique, we analyzed the factors that influence the distribution of the plastic area, such as the guide hole distribution and the in-situ stress state. The calculations showed that higher initial stresses result in greater adjustment to the stress field. When the stress concentration is greater the size of the plastic area surrounding the guide hole is larger. A multi-row distribution of the guide holes shaped like a quincunX can increase the interconnectivity of the plastic areas and allow the plastic area to extend from the tunnel wall deep into the surrounding rock. An optimized design was put forward based on the distribution of the plastic area around guide holes and the factors that influence it.     

Relationship of hydrocarbon and source-rock in Nos.3-5 tectonic belts of the Lenghu area, northern Qaidam Basin

Based on analyses of the components of crude oil hydrocarbons and carbon isotopes, the content of normal alkane de-creased from 49.00% to 20.10% when moving from the No.3 to No.5 tectonic belt of the Lenghu area of the Qaidam Basin, while cycloalkanes increased from 30.00% to 52.20% and aromatic and branch chain alkanes increased gradually as well. The maturity of sterane in crude oil is higher than that of its source-rock, which shows that the hydrocarbons were generated from a deep source-rock of high maturity around the tectonic belts of the Lenghu area. The analysis of the characteristics of carbon isotopes also shows that these isotopes of hydrocarbon compounds in the No.4 and No.5 tectonic belt are apparently heavier than those in the No.3 belt. The results of our research show that the hydrocarbons in the No.3 tectonic belt are mainly from a relatively rich sapropelic substance, while the hydrocarbons in the No.4 and No.5 tectonic belt originated mainly from organic matter of a rela-tively rich humic type substance.     

独立学院教师工作满意度的实证研究

探讨教师工作满意度对教师个人的身心健康、学校的管理工作以及社会发展有着重要的现实意义。本文从实证研究入手,构建了独立学院教师工作满意度的五维度结构模型,分析了独立学院教师工作满意度现状及其影响因素,并提出提高教师工作满意度的策略。