便携式多功能找星仪

找星仪是卫星地面站安装、调试、维修所必不可少的设备。旧的找星仪笨重、由于必须两人操作,很不方便。针对这些问题开发了便携式多功能找星仪。本文主要介绍了该设备的构成及其电路原理。     

Removal characteristics of disinfection by-products formation potential by bioaugmentation activated carbon process

The high-active bacteria were screened from 8 dominant bacteria obtained from the natural water body,and then the bioaugmentation activated carbon was formed by hydraulic immobilization of the high-active bacteria. Plant-scale studies on removal characteristics of disinfection by-products formation potentials (DBPFP) by bioaugmentation activated carbon process were conducted for micro-polluted raw water treatment. The results show that the bioaugmentation activated carbon process has adopted better purification efficiency to THMFP and HAAFP than traditional biological activated carbon process,and that average removal efficiencies of THMFP and HAAFP can reach 35% and 39.7% during the test period,increasing by more than 10% compared with traditional biological activated carbon process. The removal efficiencies of THMFP and HAAFP are stable because of the biodegradation of the high-active bacteria and the adsorption of active carbon. The biodegradability of CHCl3 formation potential is better as compared with that of CHCl2Br and CHClBr2 formation potentials among THMFP,and high removal efficiency of CHCl3formation potential is obtained by bioaugmentation degradation of the high-active bacteria. The biodegradability of HAAFP is better in comparison with that of THMFP,and the chemical properties of HAAFP are propitious to adsorption of activated carbon. Thus,HAAFP is on predominance during the competitive removal process with THMFP.     

基于SIEMENS STEP7的卸料小车自动对位控制方案

可移动卸料小车主要用于散状物料处理、矿山、堆场、冶金工厂以及港口设备中,它将物料卸在不同的料棚或仓位之中。本文以唐山中厚板厂烧结配料仓卸料小车为例,介绍了卸料小车的工艺要求、自动对位控制系统方案并给出了主要控制软件。     

虚拟机软件构建计算机实训教学环境的探索与实践

该文就计算机实训教学中引入虚拟机软件VMware构建计算机实训教学环境作了尝试。实践证明在VMware构建的计算机实训教学环境下,学生可以完成以前由于多种原因而不能完成的实验,很受师生的欢迎。采用VMware构建虚拟实训教学环境为计算机实训教学提供了一种新的教学手段。     

纯棉蓬盖布同浴复合整理工艺研究

对纯棉蓬盖布采用同浴复合整理（涂料染色、拒水拒油整理、阻燃整理）,研究了拒水拒油整理剂用量、阻燃剂用量、粘合剂用量、焙烘温度及焙烘时间等对蓬盖布拒水拒油效果、阻燃效果、染色牢度的影响．结果表明：经过复合多功能整理后,涂料染色湿摩擦牢度达到4级,阻燃效果可达B1级,拒水拒油效果良好,缩短了生产工艺流程,节水节能,具有较好工业应用前景．     

CaO-Al2O3基钢液净化剂组成的优化

运用CaO-Al2O3-SiO2三元系的熔点和等αAl2O3相图,分析了CaO-Al2O3渣系净化剂降低钢液中氧化物夹杂的能力与其组成的关系。从热力学角度看,CaO/Al2O3比值高（1.6～2.0）,则αAl2O3低（≤0.02）,有利于钢液中氧化物夹杂的降低;从动力学角度看,CaO/Al2O3低（1.1～1.26）,则熔点低（〈1400℃）,有利于钢液中氧化夹杂的排出。净化剂组成的优化结果表明,适宜的CaO/Al2O3比值为1.41～1.74,净化剂αAl2O3较低（0.02～0.04）,熔点较低（〈1450℃）。工业性试验表明,优化后的净化剂净化钢液效果显著。     

凹二次规划问题的一个融合割平面方法的分支定界混合算法

把割平面方法融于分支定界方法之中,本文提出了求解凹二次规划问题的一个融合割平面方法的分支定界混合算法,证明了该算法是收敛的.数值例子也表明这个算法是有效的,并且好于单纯形分支定界算法。     

拉钩淬火工艺优化

本文介绍了一种60Si2Mn钢制"拉钩"淬火工艺的优化方法.定型的工艺与装备成功应用在拉钩淬火生产上.     

稀土Er增强泡沫铝基复合材料的制备工艺研究

采用熔体发泡法制取泡沫铝基复合材料,系统分析了稀土Er含量、搅拌时间、保温时间和发泡剂含量对孔结构的影响。对稀土Er在铝熔体中的存在形式以及在增强过程中的强化机制进行了讨论。结果表明：加入质量分数0.40%稀土,搅拌时间7 min,发泡剂的质量分数为2%,保温5 min的条件下,可以制取孔结构均匀、孔隙率高的高强度泡沫铝基复合材料。     

The creep experiment and theoretical model analysis of gas- containing coal

A creep experiment of preformed molding coal under different confining pressures were carried out using self-developed 3-triaxial creep loading device for gas-containing coal, which loaded by Shimadzu AGI-250 kN electrical servo-controlled stiffness testing machine. Based on the experimental results, the variation trend of axial deformation under different stress states was studied, and creep failure characteristics of gas-containing coal under different confining pressures were analyzed. The experimental results were identified with seven-component nonlinear viscoelasto-plastic creep model （Hohai model）, and the creep material parameters were obtained. The experimental result complies well with the theoretical value of this model. It indicates that creep constitutive relation of gas-containing coal can be expressed by nonlinear viscoelasto-plastic creep model correctly.