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| 1 | Liquid propellant analogy technique in dynamic modeling of launch vehicle显示文摘The coupling effects among lateral mode,longitudinal mode and torsional mode of a launch vehicle cannot be taken into account in traditional dynamic analysis using lateral beam model and longitudinal spring-mass model individually.To deal with the problem,propellant analogy methods based on beam model are proposed and coupled mass-matrix of liquid propellant is constructed through additional mass in the present study.Then an integrated model of launch vehicle for free vibration analysis is established,by which research on the interactions between longitudinal and lateral modes,longitudinal and torsional modes of the launch vehicle can be implemented.Numerical examples for tandem tanks validate the present method and its necessity. | PAN ZhongWen 1,2 ,XING YuFeng 1 ,ZHU LiWen 2 ,DONG Kai 2 &SUN Mu 2 1Solid Mechanics Research Center,Beijing University of Aeronautics and Astronautics,Beijing 100191,China 2 Beijing Astronautics Systems Engineering Institute,Beijing 100076,China | 2010 | Science China(Technological Sciences)2010，53，8： | 11 |
| 2 | Expression of proliferating cell nuclear antigen in polyps from large intestine显示文摘Coloncancerhasahighincidenceintheworld,especialyinWesterncountries,andtheincidenceisalsoincreasinginChinainrecentyears.Toredu... | LUO Yu Qin 1, MA Lian Sheng 2, ZHAO Yi Ling 3, WU Kai Chun 4, PAN Bo Rong 5 and ZHANG Xue Yong 4 | 1999 | World Journal of Gastroenterology1999，5，2： | 6 |
| 3 | Synthesis and Crystal Structure of Rare Earth Complex withCiprofloxacin显示文摘The complex of rare earth with ciprofloxacin has been synthesized and characterized bymeans of x-ray single crystal diftraction. The structure features of the complex are decribed. | Pin YANG Jia Bin LI Yan Ni TIAN Kai Bei YU (1 Institute of molecular Science, Shanxi University, Taiyuan 0300062 Analysis and Test Cented, Chinese Academy of Sciences, Chengdu 610041) | 1999 | Chinese Chemical Letters1999，10，10： | 6 |
| 4 | Negacyclic codes over Galois rings of characteristic 2a显示文摘We investigate negacyclic codes over the Galois ring GR(2 a ,m) of length N = 2 k n,where n is odd and k 0.We first determine the structure of u-constacyclic codes of length n over the finite chain ring GR(2 a ,m)[u]/ u 2 k + 1 .Then using a ring isomorphism we obtain the structure of negacyclic codes over GR(2 a ,m) of length N = 2 k n (n odd) and explore the existence of self-dual negacyclic codes over GR(2 a ,m).A bound for the homogeneous distance of such negacyclic codes is also given. | ZHU ShiXin 1,2,& KAI XiaoShan 1,2 1 School of Mathematics,Hefei University of Technology,Hefei 230009,China 2 National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China | 2012 | Science China Mathematics2012，55，4： | 5 |
| 5 | Surface Modification Process by Electrical Discharge Machining with Ti Powder Green Compact Electrode显示文摘This paper describes a new method of surface modification by Electrical Discharge Machining (EDM). By using ordinary EDM machine tool and kerosene fluid, a hard ceramic layer can be created on the workpiece surface with Ti or other compressed powder electrode in a certain condition. This new revolutionary method is called Electrical Discharge Coating (EDC). The process of EDC begins with electrode wear during EDM,then a kind of hard carbide is created through the thermal and chemical reaction between the worn electrode material and the carbon particle decomposed from kerosene fluid under high temperature. The carbide is piled up on a workpiece quickly and becomes a hard layer of ceramic about 20 μm in several minutes. This paper studies the principle and process of EDC systemically by using Ti powder green compact electrode. In order to obtain a layer of compact ceramic film, it is very important to select proper electric pulse parameters, such as pulse width, pulse interval, peak current. Meantime, the electrode materials and its forming mode will effect the machining surface quality greatly. This paper presents a series of experiment results to study the EDC process by adopt different technology parameters. Experiments and analyses show that a compact TiC ceramic layer can be created on the surface of metal workpiece. The hardness of ceramic layer is more 3 times higher than the base body, and the hardness changes gradiently from surface to base body. The method will have a great future because many materials can be easily added to the electrode and then be coated on the workpiece surface. Gearing the parameters ceramic can be created with different thickness. The switch between deposition and removal process is carried out easily by changing the polarity, thus the gear to the thickness and shape of the composite ceramic layer is carried out easily. This kind of composite ceramic layer will be used to deal with the surface of the cutting tools or molds possibly, in order to lengthen their life. It also can be found wide application in the fields of surface repairing and strengthening of the ship or aircraft. | WANG Zhen-long 1, FANG Yu 1, WU Pei-nian 1, ZHAO Wan-sheng 1, CHENG Kai 2 (1. Dept. of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, China 2. School of Engineering, Leeds Metropolitan University, UK) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 4 |
| 6 | A coupled elasto-plastic-damage mechanical model for marble显示文摘A profound understanding of the mechanical behaviors of marble is very important for the design and construction of deep diversion tunnels in Jinping II hydropower station.In this paper,a coupled elasto-plastic-damage mechanical model is presented for Jinping marble.Firstly,the experimental investigations on Jinping marble are summarized.Then,based on the framework of continuum damage and plastic theories,a general mechanical model is proposed to predict the mechanical responses of Jinping marble.The proposed model is used to simulate the triaxial compressive tests,and there is a general good agreement between experimental data and numerical predictions in a qualitative manner.The proposed model is able to capture the main features of Jinping marble observed in experiments,such as progressive yielding process,damage induced by plastic distortion,dilation,elastic degradation and stress sensitivity. | ZHOU Hui 1,ZHANG Kai 2 & FENG XiaTing 1 1 State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China 2 State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining&Technology,Xuzhou 221008,China | 2011 | Science China(Technological Sciences)2011，54，S1： | 4 |
| 7 | A New Ceramide from the Basidiomycetes Armillaria mellea显示文摘A new phytosphingosine-type ceramide, armillaramide 1, has been isolated from the fruiting bodies of Basidiomycetes Armillaria mellea (Vahl ex Fr.) Quél. . Its structure was established as (2S, 3S, 4R)-2-N-(palmitoyl)-phytosphingosine by spectroscopic and chemical methods. | Jin Ming GAO1,2, Ze Jun DONG1, Ji Kai LIU1* 1 Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 2 Northwest Sci.(Tech.University of Agriculture and Forestry, Yangling, Shaanxi 712100 | 2001 | Chinese Chemical Letters2001，12，2： | 4 |
| 8 | Biosynthesis of Unsaturated Fatty Acids via Mortierella Isabellina Cultivated in a Medium Containing Butanol显示文摘Mortierella isabellina was found to accumulate large amounts of unsaturated fatty acids when it was grown in a medium containing butanol(5 g/L) and yeast extract(10 g/L) and cultivated at 25 ℃ for 5 d during which additional feeding butanol of 2 g/L was fed after being cultivated for 48 h . The resultant mycelial lipids accounted for 40 1% of the dry mycelia, while about 34% of butanol in the medium was converted. The mycelial lipids contained four kinds of unsaturated fatty acids, i.e ., palmitoleic(4 9%), oleic(54 1%), linoleic(10 4%) and linolenic(5 4%) acids. Those accounted for 74 8% of the total fatty acids. The effects of the culture conditions, such as cultivation temperature, initial pH of the medium and additional feeding butanol in the course of cultivation, on the production of mycelial lipids by M. isabellina were studied. | XIAN Mo 1, YAN Ji chang 2, CHENG Tie xin 1, KANG Yi jian 3, LI Wen xing 1, BI Ying li 1 and ZHEN Kai ji 1** 1. College of Chemistry, Jilin University, Changchun 130023, P. R. China 2. College of Chemistry, Northeast Normal University, C | 2002 | Chemical Research in Chinese Universities2002，18，3： | 3 |
| 9 | Diagnostic value of fecal occult blood testing for screening colorectal cancer显示文摘DiagnosticvalueoffecaloccultbloodtestingforscreeningcolorectalcancerCHENKun1,JIAODengAo1,ZHENGShu2,ZHOULun2,YUHai2,YUANYaC... | CHEN Kun 1, JIAO Deng Ao 1, ZHENG Shu 2, ZHOU Lun 2, YU Hai 2, YUAN Ya Chang 3, YAO Kai Yan 3, MA Xing Yuan 3 and ZHANG Yang 1 | 1997 | World Journal of Gastroenterology1997，3，3： | 3 |
| 10 | Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region显示文摘Understanding how the transpiration of this vegetation type responds to environmental stress is important for determining the wa-ter-balance dynamics of the riparian ecosystem threatened by groundwater depletion. Transpiration and sap flow were measured using the heat-pulse technique. The results were then projected up to the stand level to investigate the stand's water-use in relation to climate forcing in the desert riparian forest in an extreme arid region. This study took place from April through October 2003 and from May through October 2004. The experimental site was selected in the Populus euphratica Forest Reserve (101o10' E, 41o59' N) in Ejina county, in the lower Heihe River basin, China. The sapwood area was used as a scalar to extrapolate the stand-water consumption from the whole trees' water consumption measured by the heat-pulse velocity recorder (HPVR). Scale transferring from a series of individual trees to a stand was done according to the existing natural variations between trees under given environmental conditions. The application of the biometric parameters available from individual tree and stand levels was proved suitable for this purpose. A significant correlation between the sapwood area and tree diameter at breast height (DBH) was found. The prediction model is well fitted by the power model. On the basis of the prediction model, the sapwood area can be cal-culated by DBH. The sap-flow density can then be used to extrapolate the stand-water use by means of a series of mathematical models. | JianHua Si 1, Qi Feng 1, HaiYang Xi 1, ZongQiang Chang 1, YongHong Su 1, Kai Zhang 1,2 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China. 2. Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China. | 2009 | Research in Cold and Arid Regions2009，1，3： | 2 |
| 11 | Acrylic Acid-RGD as a Biomimetic Surface Modifier for Poly(ethylene terephthalate)显示文摘The development of the blood compatibility is important to biomaterials.The attachment of human umbilical vein endothelial cells (HUVECs) on substrates that had been covalently grafted with the cell adhesion peptides Arg Gly Asp(RGD) was investigated. The immobilization of the peptide sequences at the surfaces of biomaterials, such as poly(ethylene terephthalate) (PET), is difficult due to an absence of functional groups to support covalent attachment. It is demonstrated a novel method to overcome this problem, by attach the RGD to acrylic acid(AAC), which immobilizes the sequence through adsorption at the PET surface. When coated by AAC RGD, the human umbilical vein endothelial cells (HUVECs) seeded upon the modified PET showed a marked increase in spreading over unmodified PET. The peptides were grafted using two steps: conjugation of AAC with PET film; reaction with PET AAC and immobilization of cell binding peptides RGD. The RGD grafted surface was characterized by X ray photoelectron spectroscopy(XPS) and contact angle measurements. Cell spreading is observed by optional microscopy and scanning electron microscope(SEM). Potentially, this is a feasible method of surface modification that can design many different types of biomaterials with a variety of biomolecules. | QIU Kai 1 , WAN Chang xiu 1 , CHEN Xin 1,LI Tian quan 2 This materials is based upon the work supported under the National Nature Science Fund project of China(29874022) 1 Department of Polymer Science and Engneering, Sichuan University,Chengdu 610065,China 2 Department of Chemistry, Sichuan University,Chengdu 610065,China | 2003 | Chinese Journal of Biomedical Engineering(English Edition)2003，12，1： | 1 |
| 12 | The Application of the Edge Sharpening Operator to the Breast Near-Infrared Imaging显示文摘The principles of Gradient operator, Laplacian operator, LOG operator and Sobel operator are discussed. Certain features of breast can be extracted in different degrees and aspects from original images by applying four edge sharpening operators to the breast near infrared imaging. A great number of cases prove that compared with the other three operators, the improved Sobel operator can effectively extract the structural features of the breast from an original image. It can be concluded that the improved Sobel operator can assist in diagnosing breast diseases. | Xiang Yan 1 , Li Kai yang 1 , Yang Xuan dong 1 , Wang Xiao fang 2 ,Zhang Xian lin 2 ,Zhu Yi jun 3 1. School of Physics and Technology, Wuhan University, Wuhan 430072, Hubei, China 2. Tumor Research Institute of Hubei Province, Wuhan 430079,Hubei, China 3. E Sea Digital Engineering Limited Company, Wuhan 430072, Hubei, China | 2002 | Wuhan University Journal of Natural Sciences2002，7，4： | 1 |
| 13 | Risk Assessment of Coal Mine Water Hazard Based on Three-Dimensional Model of Geology and Underground Space显示文摘Mine safety have top-five disasters,which including the water,gas,fire,dust and geological dynamic disaster.The coal mine water disaster is one of the important factors which restricted the development of China’s coal production.It is showed by statistics that 60%of mine accidents are affected by groundwater,which not only result in the production losses,casualties and a variety of | Kai Zhang~1,Ming Huang~1,Bin Tang~2,Fan Cui~1 1.Laboratory of Coal Resources and Mine Safety,China University of Mining and Technology,Beijing 100083,China. 2.China Water Investment Co.Ltd,Beijing 100053,China | 2009 | 地学前缘2009，16，S1： | 1 |
| 14 | H IX> reinforcement learning control of robot manipulat - ors using fuzzy wavelet networks 显示文摘 | CHUAN - KAI 1 | 2009 | Fuzzy Sets and Systems2009，160，12： | 1 |
| 15 | Development of Hydrophilic outside Mirror Coated with Titania Photocatalyst显示文摘 | Hata S Kai Y Yamanaka 1 | 2000 | JSAE Review2000，21，1： | 1 |
| 16 | Grain Growth of Deformation Induced Ferrite in V Microalloyed Low Carbon Steel During Controlled Cooling Process显示文摘The effect of vanadium on the DIFT (Deformation Induced Ferrite Transformation) microstructure coarsening in low carbon steel during the continuous cooling processes and isothermal processes at different temperatures were investigated using thermo-simulator.The results showed that the steel containing a small amount of vanadium had the similar velocity of grain growth with the vanadium free steel during the continuous cooling process,but a lower velocity of grain growth than that of vanadium free steel during isothermal processes at high temperatures.On the other hand,the vanadium remarkably inhibited grain growth in the steel containing a high amount of vanadium during both the continuous cooling and isothermal processes.Vanadium dissolved in matrix is indicated as an important factor on restraining grain growth through estimating the driving force of normal grain growth and the resistance of precipitation particles of vanadium on grain growth.The influencing mechanism of vanadium dissolved in matrix on the grain growth during the controlled cooling process is discussed. | WANG Kai 1,WANG Li-jun 2,WANG Qiang 1,HE Ji-cheng 1,LIU Chun-ming 2 (1.Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China 2.School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 1 |
| 17 | Heterosis of Slaughter Performance and Meat Quality of New Zealand White Rabbit,Fujian Yellow Rabbit and Hybrid Groups显示文摘[Objective]The aim was to evaluate heterosis of hybridization groups of New Zealand White rabbits and Fujian Yellow rabbits. [Method] Totaling 80 rabbits,including New Zealand White rabbits,Fujian Yellow rabbits,and direct-cross and reciprocal cross rabbits were measured in slaughter performance and meat quality. [Result] Live-weight,evisceration weight and semi-evisceration weight of rabbits in four groups were 1 817. 20 -2 308. 60,914. 10 -1 231. 50 and 985. 99 -1 315. 20 g,respectively. For slaughter performance,FY × NZ was the highest among male rabbits and NZ was the highest among female rabbits. In addition,shear forces of crureus and longissimusdorsi for rabbits in four groups were 25. 11 -40. 44 and 18. 02 -26. 44 N,respectively,among which male NZ was the lowest in shear force of crureus and female NZ was the lowest of longissimusdorsi. Water-loss rates of crureus and longissimusdorsi were 33. 43% -41. 52% and 31. 79% -39. 01%,among which male NZ proved the lowest in water-loss of crureus and male FY achieved the lowest level for the rate of longissimusdorsi. [Conclusion]Hybrid groups showed some heteroses in slaughter performance and meat quality. | XU Shi-yong 1 ,LIU Chun 2 ,FENG Kai 3 ,ZHAO Jian-ya 4 ,WU Xin-sheng 3 1. Nantong Center for Animal Disease Control and Prevention,Nantong 226006,China 2. Experimental Animal Center,Nantong University, Nantong 226001,China 3. College of Animal Science and Technology,Yangzhou University,Yangzhou 225009,China 4. School of Public Health,Nantong University,Nantong 226019,China | 2012 | Animal Husbandry and Feed Science2012，4，2： | 0 |
| 18 | Effects of Rolling Processes on Bainite and Mechanical Properties of Ultra-High Strength Pipeline Steel显示文摘Ultra-high strength pipeline steels were rolled by thermal mechanical controlling process (TMCP),and effects of the volume fraction,the size and microstructure morphologies of three different bainite (AF,GB and LB) on mechanical properties were investigated by optical microscope.The results showed that,X120 ultra-high strength pipeline steel was rolled through the reasonable thermal mechanical controlling process (TMCP),and the yield strength and the low temperature charpy impact energy (-30℃) were higher than 840MPa and above 230J,respectively,meanwhile,the ratios of tensile strength to yield strength were lower below 0.82.As for X100 pipeline,of which the mechanical property were higher than that by X100 pipeline steel of ISO standard,yield strength of the steel was 715 MPa,ultimate tensile strength 963 MPa,impact energy 282J,and yield ratio 0.74. | ZHANG Kai 1,ZHAO Yu 2,QIU Chun-lin 1,LI Si-jun 3,DU Lin-xiu 1,WU Di 1 (1.State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,Liaoning,China 2.School of Materials,Shenyang University of Technology,Shenyang 110870,Liaoning,China 3.The Technology Research and Development Center of Laiwu Iron and Steel Group Co Ltd,Laiwu 271104,Shandong,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 0 |
| 19 | The Applications of Measurement System for Crankshaft显示文摘This paper will introduce two types of multi-parameter co-measuring system and their application in the produc- tion.The first is crankshaft bent deformation measuring machine system.The second is the crankshaft pneumatic-electric measur- ing system.They have been used in final inspection procedure of automation line for crankshaft of automobie engine with good re- sults,the structure principle and soft clash technological process of the measurement system are presented. | DAI Shangping~1 GAO Li~1 GAO Kai~2 (1.Department of Computer Science,Central China Normal University,Wuhan 430079,China. 2.Dongfeng Automobile Company,Shiyan 442001,China) | 2006 | 武汉理工大学学报2006，28，S3： | 0 |
| 20 | BAN and Remote Healthcare in a Home Network显示文摘An effective approach to improve healthcare quality is to provide Point-of-care (POC) service through a telecare system. A Body Area Network (BAN) consists of a variety of body sensors. In a telecare system the BAN can provide a network environment that allows timely collection of information and POC service, which gives significant new meaning to a home network. Through the BAN, a home network is able to promptly and effectively collect monitoring information for a telecare system, and to preview monitored medical data in advance. Should a problem arise, it can immediately notify other family members to provide relieve to the sick. | Meng Xudong 1Wang Jianan 2Lu Kai 1(1. College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China 2. Jiangsu Institute of Geriatrics, Nanjing 210024, China) | 2006 | ZTE Communications2006，4，4： | 0 |
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