中国计量科学研究院电磁开发部简介

中国计量科学研究院电磁开发部简介我部是开发研制，咨询，设计，检测，试验，生产，经营的一体化机构，实行开发，研制，销售，培训，检定，维修，代购，代销一条龙服务，具有人才，技术，信息，基标准设备等多方面的综合优势，为您提供以下产品．我部还提供电气安全综合...     

KJ—200煤矿安全电脑监测系统

本文介绍了一种新型煤矿安全监测系统，具有数据采集，传输，处理及语言报警，模拟显示等功能，可监测甲烷，一氧化碳，风速，负压，烟雾，温度等环境参数和采掘工作面，原煤运输，通风，排水各生产环节机电设备的工作状态。     

精益生产哲理在轿车发动机工厂设计中应用的探讨

本文从十四个方面，准时化（ＪＩＴ）生产，工厂总平面布置，制造工艺，设备，柔性生产，自动化，产品质量，设备开动率，工作制度（班次）工作环境，组织机构，不断优化，培训，来评定新发动机厂精益生产的水平，来探讨精益生产哲理在轿车发动机工厂设计中的应用。     

中南大学材料科学与工程学院院长粉末冶金、金属硅化物、耐热铝合金等方面的知名专家中国仪表材料学会常务理事博士生导师 易丹青 教授

易丹青，男，1953年9月出生，湖南湘乡人，中共党员，粉末冶金，金属硅化物，金属基复合材料。高性能铝合金，镁合金，铌基合金，硬质合金等方面的知名专家。中国仪表材料学会常务理事。     

小型中央空调机组的发展前景

小型中央空调同组以其性能可能，价格达中，安装方便，使用灵活，占用空间小，操作简单，维护费用低等特点，较好的满足了市场的需求，受到了用户的青睐，在住宅，别墅，餐厅，商场，写字间等外采用愈来愈多。本文分析了家用空调器的缺点，解释了小型中央空调机组的由来，说明了小型中央空调机组的特点和分类，阐述了小型中央空调机组的发展前景，为小型中央空调机组的广泛使用奠定了基础。     

《工程数学学报》编辑委员会

主编:副主编:编委:李大潜(Ll Ta一tsien，Ll Daqian，复旦大学，上海200433)张文修(常务)(ZHANG Wenxiu，西安交通大学，西安710049)王国俊(WANG Guojun，陕西师范大学，西安710062)应隆安(YING Longan，北京大学，北京100871) N .G.BARTON(CSIRO Mathematieal and Information Seienees，Australia)蔡大用(CAI Dayong，清华大学，北京100084)陈叔平(CHEN Sht，ping，浙江大学，杭州310027)陈志平(CHEN Zh iping，西安交通大学，西安710049)程正兴(CHENG Zhengxing，西安交通大学，西安710049) A DAMLAMIAN(Uni…     

从理光XF-30SUPER与金拍得丽GP-988的性能对比看金拍得丽系列相机的消费市场定位

理光XF－30SUPER相机是日本理光公司近几年推出的产品，是XF－30型机的改进型，原型机外观呈棱角型，自拍机开关为平推式，对焦采用手动3区域对焦，中途退片为手动拨杆式，计数窗为长方形。改进后的产品外观呈流线型，美观大方，自拍机开关为按钮式，对焦为手动4区域对焦，中途退片为手动按压式，计数窗为放大型圆形窗。其它功能与原型机基本一致。该机具有外型美观，功能齐全，成像清晰度较高，色彩还原好，性能可靠，质量稳定，持机手感舒适，体积小，重量轻便于携带，使用方便，价格适中等特点，因此，很受国内消费者的欢迎，有“销…     

膜的自白

..........................................……曾经的我，青春单纯，为了我那紫色梦想。有缘与你。懂我的你，只为我人生的缤纷，将绚丽的七彩色为我装扮，不曾留下你我共同的担心:刀丝、压印……也因为你的关心，你的体贴，为我穿上昂贵的AL，N丫，使我更加成熟。懂你的我，哪怕经受室温、高温的考验，也留不下通洞，白点的遗憾。人生几何，你的培育让我健康成长，时光飞逝，没有不散的宴席，面对现实，尊重你我共同的选择，临行前，你告诉我，不必伤心、哭泣，好男儿志在西方。带着你的愿望，拌着我的希望，踏上我的不归路，纵然到天…     

河南丁东水处理滤料厂

无烟煤滤料，石英砂滤料，磁铁矿滤料，活性炭、锰砂滤料，焦炭滤料，核桃壳滤料，麦饭石滤料，铝矾土、伸缩器、卵石、砾石、果壳滤料，陶粒滤料，石榴石滤料，双层陶瓷滤砖．     

成都每种存在都有价值

很少有一座城市象成都这样，把慢与快，淡与浓，俗与雅，温润与麻辣，神秘与开放，传统与前卫……如此和谐地熔于一炉，可以土得掉渣，可以洋得眩目，可以热烈激昂，也可以优雅婉转，无论是大江奔涌，小桥流水，它都不动声色地统统接纳，再慢慢化为自己的特色。     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

Mechanism Study on the Wear of CrAlTiN Coated High-Speed Steel Twist Drills Under Dry Cutting Conditions

As demands about environment protection are growing up, dry cutting technology is getting more and more concerns from all over the world. Main works performed here are study on dry cutting performances and wear mechanisms of M2high-speed steel (HSS) twist drills with CrAlTiN multicomponent coatings, which was deposited using magnetron sputter ion plating system, in drilling 45 and 30CrMnSiA steel, and their comparisons to those in drilling the same steel but using monolayer CrN and commercial TiN coated drills. Drilling performances of drills are evaluated mainly through the measurements of width on outer corner flank land and the cutting forces. Results show that performances of CrAlTiN coated drills are better than those of monolayer CrN and TiN coated drills. In drilling 45 and 30CrMnSiA steel, the average tool life of the CrAlTiN coated drills are 17.2 and 11.8 times higher than those of the uncoated drills. Observing wear of the drill with scanning electronic microscope, results show that there is no crack or spallation of the CrAlTiN coatings in wear zones. Main mechanism of the wear here is adhesion.     

Study on Bond Ability of Arc-Spraying Coatings with Different Surface Pretreatment on Cast-Iron

Arc spraying coatings are widely used in various applications, but uncommon in cast iron substrate. Different surface pretreatment technology is tested on substrates of gray cast iron. Surface roughness and residual stress were measured by TR200 and X-ray diffraction analyzer. Influence of different surface pretreatment methods ( dry blasting and fusebond) on roughness and residual stress was analyzed. The arc-sprayed coatings of wire 3Cr13 (φ2mm) on gray cast iron substrate is studied. The microstructure and interface of bonding layer were observed by SEM. The bond strength was taken by tensile test. Results show that bond strength with grit blasting is higher than fuse-bond; it is feasible to make wire 3Cr13 coating with arc spraying on cast iron substrate roughened by grit blasting.     

Structural Characteristics of TiO2 Ceramic Coating by Micro-Plasma Oxidation

TiO2 ceramic coatings with thickness of 20 μm were formed on the surface of pure titanium by micro-plasma oxidation. Their micro-structures were investigated by by using X-ray diffraction and their surface images were detected by using scan electronic microscope. There were three kinds of TiO2 coatings, pure anatase type TiO2 phase, mixed phases consisted of rutile type TiO2 phase and anatase type TiO2 phase, pure rutile type TiO2 phase. The coating surface with the pure anatase type TiO2 phase is rough, while the coating surface with the pure rutile type TiO2phase is smooth. The upper coating surface with the mixed type TiO2 phases is anatase type TiO2 structure and the subsurface of the TiO2 coating is rutile type TiO2structure.     

Evaluation of fatigue life of steel using steel grain size

The insightful discussion of the relationship between the construction of metallographic and fatigue life and proposition of mathematical relationships describing this relationship was conducted in the paper. This paper presents a method for estimating the fatigue life, based on the construction of the microstructural material taking into account the grain size and the participation of ferrite and pearlite phase.