A Comprehensive Survey of Emergency Communication Network and Management

Wireless Personal Communications - The performance of wireless communication network is important in emergency rescue operations while ensuring optimum usage of limited wireless resources. Due to...     

Isolation,purification, and characterization of the globulin from wheat germ

This research optimized the extraction and purification of globulin from wheat germ and assessed the molecular weight distribution and structure properties of the globulin obtained. The results showed that the relative extraction efficiency and purity of wheat germ globulin (WGG) reached 18.0% and 89.1% under the enzymolysis conditions of 0.32‰ α-amylase, pH 6.5, and 55 °C. The maximal precipitation rate of WGG (91.3%) was obtained with pH 4.3 (acid precipitation). Additionally, the molecular weight of WGG was mainly distributed below 70 kDa. FT-IR confirmed that random coils (30.95%), β-sheet (27.02%), α-helix (26.55%), and β-turn (15.48%) were the secondary structures of WGG. Furthermore, LTQ mass spectrometry showed that WGG was rich in variety and high in complexity, which retrieved 1274 proteins belonging to 392 proteomes by inverse peptide analysis. The findings endow a great potential of preparing WGG with superior functionality for food applications.     

矿山信息化实践

介绍了矿山的特点及国内外矿山信息化的现状，提出了矿山信息化的基本结构，论述了矿山信息化建设中的关键因素，对矿山信息化的建设具有参考价值。     

缠绕式双滚筒提升机优化起吊检修方案

提升机滚筒主轴检修过程中,由于组装"龙门架"困难,起吊滚筒时又容易造成主轴位移,引起偏摆,导致联轴器螺栓剪切变形。针对此问题,结合提升机滚筒结构,重新设计托架结构,提升检修安全系数。     

STUDY ON THE CONTROL SYSTEM OF HYDRAULIC MOMENT-ADJUSTED BRAKE FOR DOWNWARD BELT CONVEYOR

Having analyzed the drawbacks on the design of control system of hydraulic momentadjusted brake system, the author presents a closed loop control system in the process of start and braking of the conveyer. On the basis of the concept of the critical time and the critical acceleration and its deductions, the working mode of the conveyer can be identified and controlled in feedback, furthermore, thus realize the process of soft start. In the deceleration process, the author points out the problems that exist in the present control system and sets forward the control process that acted by the combined function of brake moment of motor and the drag torque of hydraulic brake at the beginning of deceleration, it will further improved reliability of conveyor system.     

硬石膏表面改性及在PVC型材中的应用

研究了硬脂酸改性硬石膏的效果和机理，测试了改性硬石膏应用于型材的力学性能。结果表明：改性后的硬石膏表面从极性变成了非极性。SEM照片显示，改性后硬石膏团聚减少；FT-IR分析表明，硬脂酸与硬石膏的表面以化学键结合。改性后的硬石膏可应用于PVC型材．并有良好的效果．在以10份填充PVC时远超过国家的型材标准。     

钛材料表面改性新技术的开发及应用研究

成功研发出能显著增强钛及钛合金耐磨耐蚀性能的经济有效、环境友好表面改性新技术—改进表面热处理(PTO)技术.用扫描电镜观察分析表面形貌和截面组织,用浸泡试验和盐雾试验评价材料的耐蚀性,用磨损试验评价材料的抗咬合能力.结果表明,PTO处理在钛表面形成了均匀致密、结合牢固的高性能防护层,其表面硬度增加了近5倍、抗咬合能力提高了3个量级;未经PTO处理钛试样在沸腾5%盐酸溶液的腐蚀速度为0.932mg/cm2·h,而PTO处理试样未检测到腐蚀失重,PTO处理钛表面层在沸腾20%盐酸溶液中的寿命是等离子氮化处理的约40倍.     

硫酸中Pb－PbO_2阳极的电催化性能

本文对铅及Ｐｂ－ＰｂＯ２在硫酸溶液中作为析氧阳极的特性进行了研究。考察了Ｐｂ－ＰｂＯ２阳极在２．５ｍｏｌ／ＬＨ２ＳＯ４中电解使用寿命，测定了铅和Ｐｂ－ＰｂＯ２阳极的极化曲线和电化学动力学参数（ａ、ｂ和ｉ０），结果表明Ｐｂ－ＰｂＯ２电极比铅电极的电催化性能优良。     

地下水动态数值模拟中随机方法研究进展

地下水水流运动有很大的随机性,随机理论方法把地下水系统中的参数看成具有空间分布的随机场,可以对水流的不确定性和空间变异性进行模拟。该文介绍了地下水动态数值模拟中随机方法的原理、适用条件及存在的问题,重点讨论了国内外地下水动态随机模型的研究应用以及各种随机估参方法。文章还提出了此领域今后的发展方向,具有一定的借鉴意义。