一种新型温度补偿方式的带隙基准电压源

设计产生正、负温度系数电压的电路,在传统基准电压源电路的基础上引入新型具有负温度系数电压的补偿电路,使基准的温度系数大大降低。设计基于中芯国际SMIC 0.18μm工艺,仿真结果表明:在工作电压5 V及环境温度27℃下,输出电压为1.3 V;在0～145℃温度变化范围内,温度系数为4.46×10-6/℃。采用二级运放结构,在低频时电源电压抑制比(PSRR)为-73.66 d B;完成了版图设计,版图尺寸为81.44μm×129.47μm。     

双导柱大吨位升降机设计及应用

介绍了双导柱大吨位升降机主要优点和参数,并对其结构进行分析,详细说明了双导柱大吨位升降机工作原理、对重系统、驱动机构、安全装置、电气控制系统,并给出了工程应用实例。     

建筑围护结构即外墙节能构造现场实体检测与芯样分析

1前言对已完工的工程进行实体检验,是验证工程质量的有效手段之一。围护结构对于建筑节能意义重大,虽然在施工过程中采取了多种质量控制手段,但是其节能效果到底如何仍难确认。为了加     

Measuring system of high polymers' pyromagnetic effect

The measurement system is the main equipment of the project.Based on the characteristic of experiment system,a sensor array is designed,and used to continually acquire the global magnetic field.A scientific scheme is developed to get the signal processing and temperature compensation for nondirective weak magnetic field.The software of sampling control system is given,which is complied using C language in Labwindows/CVI.Taking computer as main engine,the system can acquire the nondirective weak magnetic field automatically and continuously use the sensor array,the change of magnetic field can be shown in real-time and intuitively.     

Thermomechanical coupling effect of PVC sheet with defects

Thermomechanical coupling of PVC sheet with defects under uniaxial loading at different rates and different sizes of microbores was studied.The local temperature field of the dynamic damage-rupture process zone at crack tip was surveyed with infrared thermographic sensor.Based on the irreversible thermomechanics theory,the dissipation law of deformation-heat effect during the whole process was found.Furthermore,the effect of thermoelasticity in the initial stage of extension was explained.     

浅谈干粉砂浆的组成及应用

干粉砂浆是由无机胶凝材料、集料、矿物掺合料及化学添加剂组成的新型建筑材料。本文就重点分析了干粉砂浆的各组成成分及其作用机理，并简要介绍其实际应用。     

水布垭工程导流隧洞设计优化研究

在招标设计阶段，对水布垭导流隧洞设计进行了大量的设计优化研究工作。主要有：导流洞进口设计优化，将进水塔上移，减少进口明挖量，隧洞断面设计优化，改城门洞形断面为修正马蹄形，优化了隧洞的受力条件；隧洞衬砌设计优化，改全断面钢筋混凝土衬砌为分段设计的组合衬砌形式，节省了衬砌工程量，隧洞出口设计优化，缩短消力池长度，优化出口消力池施工，度汛防护方案。     

新型低碱膨胀剂的研究及应用

主要介绍了新型低碱膨胀剂的研究和应用.该膨胀剂显著降低了碱含量,并且在应用中获得了良好的效果.