维普中文期刊产品整合服务
55549篇 您的检索式:期刊名="S"
    题名 作者 年代 出处 被引量
1China 2030:Building a Modern,Harmonious,and Creative High-Income Society显示文摘On February 27,the World Ba nk released a repor t in Beijing which recommended that China needed to redefine the government’s role,alter the structure of state enterprises and gradually allow market-set interest rates in order to sustain its economic growth over the next two decades.By any standard,China’sWorld Bank 2012China's Foreign Trade2012,,4:41
2Chinese Overseas investment Calls for Perfection of Overseas Investment Insurance显示文摘Overseas investment insurance is a non-profitable insur- ance provided by the government of a state for her enterprises which have invested in the developing countries or areas against political risks.Such a gov- ernmental guarantee system was first established in the United States in the middle of last century.Nowadays most developed countries and some of the developing countries have followed American practices and set up similar systems to encourage their enterprises to make investment in developing areas which are often regarded to be more easily to have political risks.InLiu Yajun,associateprofessor,tutor of postgraduate,vice dean of the School of International Law of Northwest University of Political Science and Law.His main research orientation includes international trade law and international investment law. 2008China's Foreign Trade2008,,8:22
3Effect of Heat Treatment Temperature on Properties of Chinese Calcined Flint Clay Based Plastic Refractories显示文摘Effects of different heat treatment temperatures on properties of Chinese calcined flint clay based plastic refractories were investigated using Chinese calcined flint clay as starting material,aluminum sulfate and fireclay as binding system. The results showed that with temperature rising,Chinese calcined flint clay based plastic refractories shrinked firstly and then expanded. The modulus of rupture (MOR) and the cold crushing strength (CCS) increased firstly and then decreased from 110 ℃ to 600 ℃,then increased obviously. Thermal expansion coefficient increased from 110 ℃ to 760 ℃,decreased from 760 ℃ to 1 300 ℃,and increased from 1 300 ℃ to 1 500 ℃.ZHANG Wei DAI Wenyong YU Xinfeng LI Liang 2009China's Refractories2009,18,2:23
4Outlook on the Development of Synthetic Refractory Raw Materials Based on Natural Resources in China显示文摘China has rich resources of refractory raw materials.In the new century,the development of sophisticated synthetic refractory raw maerials with Chinese characteristics mainly based on bauxite and magnesite should be promoted at a faster tempo.They may be classified into 3 groups: (1)homogenized maerials(2) Property-optimized materials and(3) converted materials.ZHONGXiangchong 2000China's Refractories2000,9,1:13
5Second European evidence-based consensus on the diagnosis and management of ulcerative colitis Part 1: Definitions and diagnosis显示文摘Axel Dignass Rami Eliakim Fernando Magro Christian Maaser Yehuda Chowers Karel Geboes Gerassimos Mantzaris Walter Reinisch Jean-Frederic Colombel Severine Vermeire Simon Travis James O. Lindsay Gert Van Assche 2012Journal of Crohn’s and Colitis2012,,10:12
6The second European evidence-based Consensus on the diagnosis and management of Crohn’s disease: Definitions and diagnosis显示文摘Gert Van Assche Axel Dignass Julian Panes Laurent Beaugerie John Karagiannis Mathieu Allez Thomas Ochsenkühn Tim Orchard Gerhard Rogler Edouard Louis Limas Kupcinskas Gerassimos Mantzaris Simon Travis Eduard Stange 2009Journal of Crohn’s and Colitis2009,,1:10
7Looking Ahead——A New Generation of High Performance Refractory Ceramics显示文摘It is expected that in the new century, to cope with developments of new high temperature technologies, a new generation of high performance refractory ceramics will emerge and flourish which should include the following (1) oxide and nonoxide composites characterized by a unique combination of high hot strength, high thermal shock resistance and high corrosion resistance;(2) free CaO bearing basic refractories capable of purifying molten metal for improving cleanliness and of absorbing contaminants from waste gases for reducing environmental pollution;(3) free flowing zero cement castables with improved thermomechanical properties, thermal shock resistance and corrosion resistance and gradient castables with varying matrix composition and varying texture.ZHONG Xiangchong(Zhengzhou University, 75 Daxue Road, Zhengzhou, Henan 450052, China) 2002China's Refractories2002,11,3:10
8Export and Import Situation of Refractories and Refractory Raw Materials in China显示文摘The article states China is a great nation in producing and exporting refractories and refractory raw materials,which, has earned much foreign exchange for our country ,only a few advanced refactory material, zircon and chrome ore are needed to be imported.The ar-ticle points out the problems in the export and import,and raises suggestions on development.After the entry of WTO,China will expand its co-operations with other countries in science,technology,economy and trade to play a more important role in the world market.PANShangxin ZHANGZhongqi2000China's Refractories2000,9,3:9
9Effect of Boric Acid on Properties of Calcined Flint Clay-bauxite Castables显示文摘In order to prolong the working time of calcined flint clay-bauxite castables during construction at high temperature,boric acid was added into the castables. The effect of boric acid on working time and curing cold crushing strength of the castables at 25 ℃ and 35 ℃ were investigated. After 24 h curing in mould and another 24 h curing at 110 ℃ after demoulding,the specimens were heat treated at 1 000 ℃,1 300 ℃,and 1 500 ℃ for 3 h,respectively. The permanent linear change,bulk density,modulus of rupture,and cold crushing strength were determined. The result shows that there is no need to add boric acid when calcined flint clay-bauxite castables works at 25 ℃; when calcined flint clay-bauxite castables works at 35 ℃,boric acid can increase the working time of the castables,but decrease the curing cold crushing strength a little. Adding boric acid into calcined flint clay-bauxite castables doesn't worsen performance of the castables.ZHANG Wei DAI Wenyong 2010China's Refractories2010,19,3:9
10Some Aspects in the Development of High Performance Refractories for Iron and Steel Making in China显示文摘In the past 25 years in China, to meet with the rapid increase in steel production accompanied by adoption of advanced metallurgical technologies, there has been fast development of China’s refractories industry in production capacity, in quality improvement and in development of new products. Sophisticated high performance refractory materials mainly based on our rich reserves of magnesite, bauxite and flake graphite have been developed, such as carbon-bonded products, high purity oxide products, bauxite-based low creep and high strength high alumina bricks and LC, ULC and ZC castables. They have been used in blast furnaces, BOFs, EAFs, secondary refining and continuous casting with considerable improvement in service performance.ZHONG Xiangchong YE Fangbao 2005China's Refractories2005,14,3:7
11Effect of Additives on Sintering of Cr2O3 in Reductive Atmosphere显示文摘The influence of additives TiO2,Y2O3 and composite rare earth on sintering of Cr2O3 in reductive atmosphere was studied.Results show that TiO2 can effectively increase the sinteed density at low temperature,As the increase of sintering temperature,such kind of effect becomes more and more unobvious and finaly disappear at 1550℃.Moreover,Y2O3 and composite rare earth have negative effect on sintering.LIANGYonghe SUNChengxu 2001China's Refractories2001,10,3:7
12European evidence based consensus for endoscopy in inflammatory bowel disease显示文摘Vito Annese Marco Daperno Matthew D. Rutter Aurelien Amiot Peter Bossuyt James East Marc Ferrante Martin G?tz Konstantinos H. Katsanos Ralf Kie?lich Ingrid Ordás Alessandro Repici Bruno Rosa Shaji Sebastian Torsten Kucharzik Rami Eliakim 2013Journal of Crohn’s and Colitis2013,,12:7
13The Trans-Pacific Partnership:A High Barrier Agreement?显示文摘TPP is not only a simple FTA but a 'Sample Agreement' that has high hope from USTR (Office of the United States Trade Representative).There are those who are concerned that the TPP is an attempt by the United States to promote American hegemony.What is the true aim of TPP? Why does the United States push forward it? This article will offer some insights.Edwin Way 2012China's Foreign Trade2012,,4:7
14浅谈企业市场营销战略中存在的问题与对策显示文摘刘哲 王雅娟 2011China’s Foreign Trade2011,,10:6
15Refractories Development for Iron and Steel Making in China显示文摘The developments of high performance refractories for the fast developing iron and stel industry in China in recent years have been briefly reviewed.Most of the sophisticated new produts developed are based on the country's natural raw materials,mainly bauxite,magne-site and graphite which occur in abundance.ZHONGXiang-chong 1996China's Refractories1996,5,1:6
16The Studies on Al2O3—SiO2 Based Castables Containing Andalusite显示文摘The studies on the linear change,cold MOR and the refractoriness under olad of the Al23-SiO2 based castables which contain andalusite were carried out.The results show that the linear change at over 1400℃ changes from negative value to positive if the castables contain over 10% an-dalusite;the higher the addition of andalusite in the castables,the larger is the expansion;The re-fractoriness under load increase obviously with the increasing of the andalusite content in the casta-bles;meanwhile,cold MOR and cold crushing stuength decrease as a result of the large volume expansion.HEJin-zhou SEESoo-loi1994China's Refractories1994,3,2:6
17Thermal Behavior in Relation to Different Bindings of Alumina Based Castables from 20 to 1000℃显示文摘Thermal behavior and physical properties of castables during curing and drying-out are associated with their binding system. In this work, five alumina based (Al2O3>87%) castables with different combinations of binding materials, i.e., (1) CA cement (CA)+Reactive alumina (RA)+H2O; (2) high level addition of CA+Microsilica (MS)+H2O; (3) low level addition of CA+MS+H2O; (4) MS+Hydratable alumina+H2O and (5) MS+Magnesia+H2O, respectively, have been investigated on the flowability and thermal behavior during curing at room temperature, drying at 110℃ and heating from 200℃ to 1000℃ at an interval of 100℃, in terms of water addition, vibration flow value, porosity, dehydration, explosion resistance, cold and hot bending strengths. Differences in dehydrating behavior and the mentioned properties have been revealed and correlated to the binding system.ZHOU Ningsheng LIU Min ZHANG Sanhua 2006China's Refractories2006,15,4:5
18Sillimanite,Kyanite and Andalusite in China and Their Applications Part Ⅰ:Their Reserve,Distribution and Characteristics显示文摘Sillimanite,kyanite and andalusite are advantageous natural refractory raw materials for aluminosilicate refactories to attain improved key properties.This paper are divided into parts to introduce their resource and technical characteristic in the first part,and their applications in refractories in the second aprt to be succeeded.In this part,based on authors' knowledge and sources,information on their reserve,distribution,composition and characteristic is provided,to bring it to light that China is rich in the reserve of them,in particular andalusite.The sillimanite group minerals are characterized by their phase transformation to form primary mullite and secondary mullite when added in high alumina system,accompanied by volume expansion,which can be taken use to improve creep resistances and thermal shock resistance of the related refractories.LINBinyin LIUJiehua ZHOUNingsheng WANGJianiun 2003China's Refractories2003,12,3:5
19新时期企业政工干部存在问题及自身建设对策浅析显示文摘程云玲 2010China’s Foreign Trade2010,,2:5
20AI_4C_3 Hydration Thermochemical Analysis for Burned Carbon-containing Refractories with Al显示文摘In this paper, X-ray diffractogram analysis and SEM observation of Al4 C3 formed at high temperature from carbon-containing refractories with Al have been carried out.Aluminum added to carbon-containing refractories reacts with C(s)to form Al4 C3(s) gradually during heating from 600 ℃ to 1200℃.It is considered that the interlocked structure of Al4 C3 plate crystals promotes the outstanding increase of hot modulus of rupture of carbon-containing refractories with Al. The HMOR of carbon-containing refractories added with Al additive from 0 to 5wt% increases by 2.8 times being from 6.5MPa to 18.2MPa.After a thermochemical calculation for hydration reaction processes of Al4 C3 and H2O(g), the equilibrium partial pressure chart of H2O(g)in H2O-Al4C3-Al(OH)3 system vs various temperatures has been attained . The H2O (g) partial pressure in the air needed for the Al4 C3 hydration reaction is no more than 10~18 atm at the temperature below 120℃.It is considered that the burned carbon-containing refractories with Al is extremely easy to hydrate and the cracking of burned carbon-containing refractories is generated because that the hydration expansion is 2.11 times during transforming from Al4 C3 to Al(OH)3.The fundamental measure against hydration of the refractories is to insulate the refractories from H2O(g)by various means such as pitch impregnation or other sealing materials.YANG Ding’ao, YU Zhiming and FAN Liuwu( Sanmenxia Polytechnic College, Sanmenxia, Henan 472000, China ) 2003China's Refractories2003,12,1:5
返回顶部 每页显示:
共2778页 首页 上一页 第1页 下一页 末页 /2778 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费