检索结果-南通市图书馆

Tribology properties of plasma sprayed nanostructured and conventional WC-Co coatings under water environment

在线全文

cnki会议

学校读者我要写书评

暂无评论

Tribology properties of plasma sprayed nanostructured and co...

Fifth International Conference on Surface engineering

作者： Xiaoqin Zhao1 2.Jianjim Chen1 Huidi Zhou1 1 State Key Laboratory of Solid Lubrication Lanzhou institute of chemical {2. Chinese Academy of Sciences Lanzhou 73.000 {3. 2.Graduate School Chinese Academy of Sciences Beijing 10003. {3.

WC-Co cermet has wide applications in machinery industries as a wear-resisitance *** fabrication of Nanostructured coatings would be more encouraging in tribological surface *** this paper,the nanostructured and conventional WC-Co coatings were depsited on 1Cr18Ni9Ti stainless steel substrate using an atmospheric plasma spray *** microstructures and tribology properties in water environment were comparatively *** was found that the as-sprayed WC-Co coating were composed of WC as the major phase and W2.,WC1-X,and W3.o3. as the minor *** nanostructured WC-Co coating had much higher hardness and more uniform *** water environment,both the nanostructured and conventional WC-Co coatings had the similar friction coefficient under the same ***,nanostructured WC-Co coating had better wear resistance than conventional WC-Co coating no matter sliding against Si3.4 ball or stainless steel *** wear mechanism of nanostructured WC-Co coating is adhesion under 2. N and brittle flake with fatigue abrasion under 150N sliding against Si3.4 ball,while when the Si3.4 ball was replaced by stainless steel ball,the friction coefficient and the wear rate were effectively reduced,and the wear mechanism was adhesion under 2. N and split by crack under 150 *** WC-Co coating was more wear-resistance than the conventional one in water environment,and the friction coefficient and wear rate could be effectively reduced when rubbing against stainless steel ball.

关键词： Plasma spraying WC-Co coating water environment tribolobgy

ROLE OF POTASSIUM MODIFIER IN COPPER-BASED CATALYSTS FOR MIXED ALCOHOL SYNTHESIS STUDIED BY XPS

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 1993年第1期 1-12页

作者： XIONG Guo-Xing SHENG Shi-Shan State Key Laboratory of Catalysis Dalian institute of chemical {2. Academia Sinica Dalian,Liaoning 11602.3}HEN Bao-Shu ZHAO Jiu-Sheng Department of chemical engineering Tianjin University,Tianjin 3.0072

The surface states of CuO-ZnO-AlO-KCOcatalysts for mixed al-cohol synthesis and the role of potassium as modifier were studied by XPS mea-surements under simulated real reaction *** reduction and reac-tion,no stable Cuand Cuions were *** Cuwas *** to be dispersed on oxygen-deficient species ZnO（x<1）and AlOinthe form of *** is proposed that Cuis one of the active compo-nents on the surface for the *** active units exist as（is oxygen vacancy）for mixed alcohol as well as for CHOH *** potassium modifier was bondedto *** the absence of AlO,surface enrichment of K was *** is strong electronic interaction between K and reduced CuO,with K actingas a donor and transferring electrons to *** no obvious electronic interac-tion between K and Cuwas detected during the *** is suggested thatbesides the possible action of neutralizing the acidity of AlO,K can act on Cuthrough ZuO to stabilize oxygen-containing intermediates,promoting C-C chaingrowth and improving higher alcohol selectivity.

关键词： CuO ZnO

chemical Composition and Size Distribution of Airborne Particulate Water-Soluble Species in Xi'an,Central china during Spring 2.09:Implications for Heterogeneous Reactions of Anthropogenic Pollutants with Mineral Dust

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Composition and Size Distribution of Airborne Parti...

第八届海峡两岸气溶胶技术研讨会暨第三届空气污染技术研讨会

作者： Gehui Wang1, Bianhong Zhou2. ianjun Li1, Chunlei Cheng1, Ting Zhang1, Wenting Dai1, Junji Cao1, Renjian Zhang3.1 State Key Laboratory of Loess and Quaternary Geology, institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, {2. 2.Department of Geographical Science and Environment engineering, Baoji University of Art and Science, Baoji 72.013. {2. 3.Key Laboratory of Regional Climate-Environment for East Asia, institute of Atmospheric physics, Chinese Academy of Sciences, Beijing 10002., {2.

PM10 and size-resolved (9-stage) aerosol samples in the urban air of Xi’an, china were collected during the spring of 2.09 including a massive dust storm occurring on April 2.th and measured for inorganic ions, water-soluble organic (WSOC) and inorganic carbon (WSIC), water-soluble organic nitrogen (WSON), EC and OC. Characteristics of chemical compositions and size-distributions of those measured species in the urban samples were investigated and further compared with those simultaneously observed on the mountaintop of Mt. Hua, which is located about 150 km east to the city, to recognize the impact of dust storm on aerosol chemistry of the downwind region. PM10 in Xi’an during the non-dust storm period ranged from 58-42. g m-{2.(2.7±79 g m-{2., and sharply increased to a {2.hr maximum of 890 g m-{2.(av. 589±2.{2.g m-{2. on the dust storm day (April 2.th). Mass-closure study results showed that during the non-dust storm period organic matters accounted for 2.% of the PM10 particle mass, followed by SO42. (1{2.), NO{2. (10%), water-soluble carbonate (10%), EC (5%), NH4+ (4%), and other ions (7%). In contrast, water-soluble carbonate became the most abundant among the measured species during the dust storm period, accounting for 12. of the PM10 mass, followed by organic matters (11%), SO42. ({2.), Ca2.(2.) and NO{2. (1.5%). Such a changes in chemical compositions suggests a significant heterogeneous reaction of acidic gases (e.g., H2.O4, HNO{2. SO2.and N2.5) with dust to form water-soluble mineral compounds. A bimodal size distribution of particles was observed during the non-dust time with two equivalent peaks in the fine (2.1 m) and coarse (>2.1 m) ranges, in contrast to a unimodal pattern (i.e., coarse mode) observed on the dusty day. All the measured ions except NH4+ significant shifted toward larger particles during the dust storm time. Similar size-distribution patterns of particles were found on the mountaintop of Mt. Hua, which are bimodal during the non-dust period and

关键词：

在线全文

cnki会议

学校读者我要写书评

暂无评论

飞秒抽运随机激光输出波形的可控性研究

物理学报 2011年第7期60卷 275-279页

作者：吕健滔王可嘉刘劲松姚建铨朱启华张清泉武汉光电国家实验室华中科技大学光电子科学与工程学院武汉430074 天津大学精密仪器与光电子工程学院激光与光电子研究所光电信息技术科学教育部重点实验室天津300072 中国工程物理研究院激光聚变研究中心绵阳621900

本文基于随机激光的时域理论,研究了飞秒脉冲抽运下二维随机激光的辐射特性,并着重讨论了抽运脉冲的峰值强度、脉宽和脉冲波形对辐射光时域波形的影响.结果表明,辐射光的时域波形强烈依赖于抽运光脉冲的参数,通过调整抽运方式可以控制... 详细信息

本文基于随机激光的时域理论,研究了飞秒脉冲抽运下二维随机激光的辐射特性,并着重讨论了抽运脉冲的峰值强度、脉宽和脉冲波形对辐射光时域波形的影响.结果表明,辐射光的时域波形强烈依赖于抽运光脉冲的参数,通过调整抽运方式可以控制辐射光的输出波形.数值模拟结果为研究随机激光输出波形的可控性技术提供了理论依据.

关键词：激光物理随机激光器飞秒抽运脉冲波形

Carbon Content Detection Methods' Research in the AOD Furnace

在线全文

学校读者我要写书评

暂无评论

Carbon Content Detection Methods' Research in the AOD Furnac...

2.10 International Conference on Computer,Mechatronics, Control and Electronic engineering (CMCE 2.10)

作者： Meng Hui Tang Yuguo Chen Fangxiao 1,Changchun institute of Optics,Fine Mechanics and physics,Chinese Academy of Sciences 2.Graduate University of Chinese Academy of Sciences {2.Changchun University of Technology Changchun,china

In the process of smelting of iron alloy,the carbon content has been a most important reference to the control of refining *** article describes the commonly used offline detection methods about carbon content of hot metal smelting furnace,including chemical analysis and spectrometry,and introduces the on-line measurement principle,measuring devices,and modeling based on the light's intensity value.

关键词： AOD carbon chemical analysis Spectralanalysis

Preparation and Characterization of Silicalite-1/Ni-SiO2.Capsule Catalyst for Alkali Resistance in DIR-MCFC

在线全文

cnki会议

学校读者我要写书评

暂无评论

Preparation and Characterization of Silicalite-1/Ni-SiO2 Cap...

The 12.h Asian Pacific Confederation of chemical engineering Congress

作者： Jinglin Zhou~a Xiongfu Zhang~(a*) Li Zhou~b ~aState Key Laboratory of Fine chemicals,School of chemical {2. and Technology,Dalian University of Technology,Dalian 116012.{3.. ~b Fuel CA Research & Development Center,Dalian institute of chemical physics,Chinese Academy of Sciences,Dalian 11602.3}{3.

During the past decades,direct internal reforming molten carbonate fuel cell (DIR-MCFC) have drawn substantial attention as a device for electricity power generation,in which hydrogen can be directly and continuously ... 详细信息

关键词： capsule catalyst silicalte-1 membrane alkali resistance DIR-MCFC SRM

^(188)Re-TTHMP的合成及其在小鼠体内分布的研究

在线全文

cnki会议

学校读者我要写书评

暂无评论

四川大学学报（自然科学版） 2004年第3期41卷 623-627页

作者：蒋树斌刘业兵罗顺忠刘国平中国工程物理研究院核物理与化学研究所四川绵阳621900

作者合成了氨基甲撑膦酸配体三乙烯四胺六甲撑膦酸.以龙胆酸与抗坏血酸为保护剂、通过SnCl2.原188ReO-4制备了188Re TTHMP.研究表明,当还原剂SnCl2.量大于0.5mg及制备体系pH为1.5～3.5和配体TTHMP用量大于2.mg时,通过温水浴(85℃)反应... 详细信息

作者合成了氨基甲撑膦酸配体三乙烯四胺六甲撑膦酸.以龙胆酸与抗坏血酸为保护剂、通过SnCl2.原188ReO-4制备了188Re TTHMP.研究表明,当还原剂SnCl2.量大于0.5mg及制备体系pH为1.5～3.5和配体TTHMP用量大于2.mg时,通过温水浴(85℃)反应3.min即可制得标记率高于95%的188Re TTHMP,标记物在体外4d内的放化纯高于92..由正常小鼠体内分布研究表明,当将放射性注入鼠体1h后,188Re TTHMP能迅速浓集在其骨骼系统内,其峰值达(19.81±3.83.%/g,之后骨骼所摄取的放射性迅速下降,到48h时,其骨骼内的放射性仅保留(6.2.0}1.52.%/g.

关键词： ^188Re TTHMP 生物分布标记

在线全文

学校读者我要写书评

暂无评论

面向对象的网络信息空间模型与信息传播

计算机科学 2003年第2期30卷 34-37页

作者：马卫东李幼平袁宏春中国工程物理研究院电子工程研究所绵阳621900 电子科技大学计算机学院成都610054

The Cyberspace is composed of a set including all electronic information elements and its information dissemination networks. In this paper,a kind of Cyberspace Model that four-dimensional entity described is submitted,and the classification and characteristic of the information element and information node are studied. The Object Oriented Model of Cyberspace that anthropomorphized is discussed and the mechanism of the information dissemination is analyzed. Finally we put forward to a Personalizing Information Storage Model.

关键词：面向对象网络信息空间模型信息传播 Internet TCP/IP协议局域网计算机网络

一种2.sps数字示波器数据采集系统的设计

在线全文

学校读者我要写书评

暂无评论

信息与电子工程 2009年第4期7卷 257-260页

作者：王浩王子斌中国工程物理研究院流体物理研究所四川绵阳621900 电子科技大学自动化工程学院四川成都610054

数据采集系统是数字存储示波器的核心部分。在研究剖析数字存储示波器工作原理的基础上,围绕其数字系统的设计与实现,采用ADC+高频时钟电路+FPGA+DSP的结构模式,实现最高实时采样率2.sps、分辨力8bit、存储深度8MB/CH的示波器数据采集系... 详细信息

数据采集系统是数字存储示波器的核心部分。在研究剖析数字存储示波器工作原理的基础上,围绕其数字系统的设计与实现,采用ADC+高频时钟电路+FPGA+DSP的结构模式,实现最高实时采样率2.sps、分辨力8bit、存储深度8MB/CH的示波器数据采集系统,为国内高速数据采集系统设计提供了一种解决方案。

关键词： 2 Gsps 实时采样率数字存储示波器数据采集系统