|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | OPTICAL PROPERTIES OF GeO_2 AND Ge NANOCRYSTALS显示文摘he co m pound m aterial of n m size particles Ge O2 Si O2 w as synthesied through hydrolysis of Si( O C2 H4) and Ge Cl4 . A heat treatm ent w as carried out for the sa m ples at 100 ~1200 ℃in air . Its optical property w as deter mined by U V Vis spectur m . We have found that theabsorption edge of spectru m shifted progressively to longer w avelengths . The quantu m size ef fect of nanocrystals appears because crystals gro w and energy of optical band gap reduces d ueto the influence of te m perature . By the analysis of X ray diffraction w e have observed theprocess in w hich the structure of particles changed fro m disorder into order . | Y.H.Zhou 1) ,Y.Y.Feng 2) and H.Y.Lu 2) 1)Department of Physics Nanjing Normal University, Nanjing 210097,China 2)Physics and Ch寁O P T I C A L P R O P E R T I E S O F Ge O2 A N D Ge N A N O C R Y S T A L S Y. H. Zhou1) , Y. Y. Feng2) | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 22 |
| 2 | Prevention and treatment of hepatic artery thrombosis after liver transplantation显示文摘BACKGROUND: Hepatic artery thrombosis (HAT) which is a serious complication after orthotopic liver transplanta- tion (OLT) remains a significant cause of graft loss. The purpose of this study was to sum up our experiences in the prevention, diagnosis and management of HAT after liver transplantation. METHODS: From April 1993 to September 2003, a total of 198 patients underwent OLT at our hospital. The hepatic artery was anastomosed using 7/0 prolane with running continuous suture in 96 patients (group 1) and with inter- rupted suture in 102 (group 2). Ultrasonography was per- formed every day in two weeks after operation and selec- tively afterwards. RESULTS: HAT occurred in 6 patients (6.3%, 6/96) of group 1, and in 1 (1%, 1/102) of group 2 (x2=4.027, P= 0.045). Six patients received emergency thrombectomy, and 1 conservative therapy but died from tumor recurrence eventually. Biliary complication developed in 3 patients af- ter thrombectomy of whom 2 died of liver failure and one waited for retransplantation. In the other 3 patients after thrombectomy, 1 died of renal failure, and 2 survived. The mortality of patients with HAT was 57.1% (4/7). CONCLUSIONS: The technique of hepatic arterial anasto- mosis is the key factor for the prevention of HAT. Routine ultrasonography is very important in early detection of HAT after OLT. Biliary complication is a severe outcome secondary to HAT. | Shu-Sen Zheng, Zhi-Yong Yu, Ting-Bo Liang, Wei-Lin Wang, Yan Shen, Min Zhang, Xiao Xu and Jian Wu Hangzhou, China Centre of Organ Transplantation and Department o Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital of Medica College, Zhcjiang University, Hangzhou 310003, China | 2004 | Hepatobiliary & Pancreatic Diseases International2004，3，1： | 18 |
| 3 | GURTIN VARIATIONAL PRINCIPLE AND FINITE ELEMENT SIMULATION FOR DYNAMICAL PROBLEMS OF FLUID-SATURATED POROUS MEDIA显示文摘Based on the theory of porous media,a general Gurtin variational principle for theinitial boundary value problem of dynamical response of fluid-saturated elastic porous media isdeveloped by assuming infinitesimal deformation and incompressible constituents of the solid andfluid phase.The finite element formulation based on this variational principle is also derived.Asthe functional of the variational principle is a spatial integral of the convolution formulation,thegeneral finite element discretization in space results in symmetrical differential-integral equationsin the time domain.In some situations,the differential-integral equations can be reduced to sym-metrical differential equations and,as a numerical example,it is employed to analyze the reflectionof one-dimensional longitudinal wave in a fluid-saturated porous solid.The numerical results canprovide further understanding of the wave propagation in porous media. | Yang Xiao Cheng Changjun Department o,f Mechanics, Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200436,China) | 2003 | Acta Mechanica Solida Sinica2003，16，1： | 10 |
| 4 | A New Integrated Design Method Based on Fuzzy Matter-Element Optimization显示文摘This paper puts forward a new integrated design met ho d based on fuzzy matter-element optimization.On the based of analyzing the mod el of multi-objective fuzzy matter-element , the paper defines the m atter-element weightily and changes solving multi-objective fuzzy optimization into solving dependent function K(x) of the single-objective optimization according to the optimization criterion. The paper particularly describes the realization approach of GA process of multi -objective fuzzy matter-element optimization: encode, produce initial populati on, confirm fitness function, select operator, etc. In the process, the adaptive macro genetic algorithms (AMGA) is applied to enhancing the evolution speed. Th e paper improves the two genetic operators: crossover and mutation operator. The modified adaptive macro genetic algorithms (MAMGA) is put forward simultane ously. It is adopted to solve the optimization problem. Three optimization methods, namely fuzzy matter-element optimization method, li nearity weighted method and fuzzy optimization method, are compared by using the table and figure, it shows that not only MAMGA is a little better than the AMGA , but also it reaches the extent to which the effective iteration generation is 62.2% of simple genetic algorithms (SGA). By the calculation of optimum exam ple, the improved method of genetic in the paper is much better than the method in reference of paper. | ZHAO Yan-wei 1, ZHANG Guo-xian 2 (1. College of Mechanical Engineering, Zhejiang University o f Technology, Hangzhou 310014, China 2. College of Mechanical & Electronic al Engineering, Shanghai University, Shanghai 200072, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 5 |
| 5 | PANSYSTEMS LOGIC:A NEW LOGIC FRAMEWORK FOR ARTIFICIAL INTELLIGENCE显示文摘Zan Tingquan and Wu Xuemou, Pansystems logic: a new logic fra-mework for AI.In this artic1e, we take a step towards providing a new logic fra-mework as a basis for human and artificial intelligence.We unite logic,epistemology, cognitive science, methodology and s ystems sciences tostudy cognitive processes and forms of thought and try to construct anew logic framework by use of pansystems metllodology.The new logicframework is called pansystems Logic.Included are:(1)propose the concepts of generalized. subjects and generalizedobjects, articulate the pansystems observocontrol relativity principle asa new model of cognitive foundations for artifitial intelligence.(2)present fifteen layer-parts of artifitial intelligence researchfrom the new view, i.e.AI concerns with five aspects of man, things,the relations between man and things, artificial systems, the relations be-tween the former three and the latter one,which should be studied fromthree levels of philosophical, mathematical and technical researches. | Zan Tingquan Li Yongli(Northwest Development Institute, Lanzhou University, Lanzhou 730000,Gansu,People’s Republic of China)Wu Xuemou(China Digital Engineering Institute,P。O。Box 74223, Wuchang 430074,Hubei,People’s Republic of China) | 1991 | 天水师范学院学报1991，11，4： | 4 |
| 6 | Power flow in the coupled dynamic system of machinery and building floor显示文摘The transmision mechanism of vibrational power flow in the complex flekible coupled system of machinery mouned on a multi-storey plant building via isolators are studied in this paper from the viewpoint of energy. In view of practical isolation designs in engineering,an asymmetric isolation system with mtiltiple isolators on a fiekible foundation is modeled, in which the interactions between the machine and the floor, and among different mouating points are taken illto account. Moreover, the transmission characteristics of power flow in the system concerned are analyzed with the use of subsystem mobility synthetic techaique. Further more,the power flow spectra of the asymmetric system are calculated and compared with those of symmetric one to reveal the effects of asymmetricity and system parameters on the power flow.Finally, new approaches to the control of structural vibration and acoustics for this kin of problems are proposed. | XIONG Yeping Song K.J. and Wang C.(Institute o, Engineerng Medanics, Sandong University of Technology, Jinan, 250014) | 1996 | Chinese Journal of Acoustics1996，15，1： | 3 |
| 7 | Oligomeric Procyanidins Induce Generation of Reactive Oxygen Species and Collapse of Mitochchondrial Membrane Potential in Glioblastoma Cell Lines显示文摘Objective The aim of the present study was to clarify the mechanism underlying glioma cell death upon oligomeric procyanidins (F2) exposure. Methods The cytotoxicity of F2 on U87 (human malignant glioblastoma cell line) and C6 (rat glioma cell line) cancer cells was evaluated, and changes of mitochondrial membrane potential (MMP) and production of reactive oxygen species (ROS) in drug-treated cells were monitored. Moreover, morphological changes associated with F2-induced cells death were examined. Results F2 induced a concentration-dependent increase in ROS production and decrease in MMP. Furthermore, pre-incubation with N-acetylcysteine (NAC) and rotenone (Rt), resulted in partial inhibition of F2-induced ROS generation and marked attenuation of cell death and the cytoplasmic vacuolization induced by F2. In addition, pretreatment with Rt markedly attenuated the MMP loss in F2-treated cells. However, pretreatment with NAC only markedly attenuated the MMP loss in F2-treated C6 cells. Conclusion The increase in ROS level is at least one of mechanisms associated with F2-induced glioma cell death as well as the cytoplasmic vacuolization formation that contribute to the cytotoxicity of F2 in glioma cells. | ZHANG Feng-jiao1, YANG Jing-yu1, MOU Yan-hua1, SUN Bao-shan2, WANG Ji-ming3, WANG Fang1, WU Chun-fu1 1. Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China 2. Estaco Vitivinícola Nacional, Instituto National de Investigaco Agrária, Dois Portos 2565-191, Portugal 3. Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick Maryland 21702, USA | 2009 | Chinese Herbal Medicines2009，1，1： | 3 |
| 8 | Correlative ionospheric disturbances in the sunlit hemisphere during the flare on July 14,2000显示文摘Using GPS data obtained from GPS sites located on the sunlit hemisphere during the flare on July 14, 2000, the ionospheric response to the flare was analyzed. A kind of tiny correlative ionospheric fluctuations were revealed from the temporal total electron content (TEC) curves derived from GPS measurements, and the values of this kind of disturbances are about 1015 m-2. A comparative analysis of these disturbances and soft X-ray flux detected at GOES satellite during the flare is done. It is found that this kind of disturbances revealed in the temporal TEC curves did occur in a very large area of sunlit ionosphere and its behavior is mainly controlled by the characteristics of the flare’s extra radiation. Because the similar fluctuations are not found in the curve of soft X-ray flux, it is concluded that the flare extra radiation in EUV band should have corresponding fluctuations and it is the fluctuations that cause the TEC disturbances. The height, where the disturbances occur, should be in the F | ZHANG Donghe & XIAO ZuoDepartment of Geophysics, Peking University, Beijing 100871, China Qingdao Research Center, Chinese Research Institute of Radio-wave Propagation, Qingdao 266071, China Center for Space Science and Applied Research, Chinese Academy o | 2002 | Chinese Science Bulletin2002，47，12： | 2 |
| 9 | On Geodynamic Evolution of Simao Region (Southwestern Yunnan, China) during Late Paleozoic and Triassic显示文摘Over the last years, the Simao region, southwestern Yunnan, China, turned out to be a very promising target to elucidate plate tectonic processes around the Permian Triassic boundary within the Tethyan domain of Asia. New data from this area reveal that Upper Paleozoic compressional deformations occurred along the Lancangjiang and in areas to the east. Along Lancangjiang, an angular unconformity is exposed, which separates quartz phyllites—formed during a Carboniferous tectono metamorphic event—from Triassic red beds to roofing rhyolites. The acidic volcanics were often said to be remnants of a volcanic arc that was active during the Triassic subduction and closure of an oceanic realm along the Lancangjiang zone. According to our new data, however, these volcanics indicate most probably an Upper Triassic stage of rifting. In the Yunxian anticline (NW of Simao), an angular unconformity of intra Permian age is exposed where Carboniferous to lower Middle Permian strata, which were deposited in a rather deep basin, are unconformably overlain by a shallow marine sequence of upper Middle to Upper Permian sediments. The angular unconformity is of the same age as the syn orogenous sediments first described and dated from the Phetchabun region in Thailand and hence a convincing argument for a Late Variscan orogeny forming an extensive zone of mountain building that can be traced through the central parts of mainland Southeast Asia. | Helmcke DGZG, University of Goettingen, D 37077 Goettingen, GermanyIngavat Helmcke Rc/o GZG, University of Goettingen, D 37077 Goettingen, GermanyFeng QinglaiFaculty of Earth Sciences, China University of Geosciences, Wuhan 430074 Wagner B Heppe KGZG, | 2001 | Journal of China University of Geosciences2001，12，3： | 2 |
| 10 | Simulation in undergraduate medical education: bridging the gap between theory and practice显示文摘 | Wellington S M University O Wellngton S | 2004 | Med Edu2004，38，1： | 1 |
| 11 | Practical guidelines for optimal gamma probe detection of sentinel lymph nodes in breast cancer: Results of a multi-institutional study显示文摘 | Robert C.G. Martin Michael J. Edwards Sandra L. Wong Todd M. Tuttle David J. Carlson C.Matthew Brown R.Dirk Noyes Rebecca L. Glaser Donald J. Vennekotter Peter S. Turk Peter S. Tate Armando Sardi Patricia B. Cerrito Kelly M. McMasters for the University o | 2000 | Surgery2000，，： | 1 |
| 12 | Comparison between Paleozoic and CenozoicLithospheric Mantle in Eastern Part of North China Block: With a Discussion of Mantle Evolution显示文摘Paleozoic diamond- and xenolith-bearing kimberlites and Cenozoic xenolith-bearing basalts,erupted in the eastern part of the North China block (NCB), provide excellent mantle probes for the research of intra-plate processes and the Phanerozoic evolution of the subcontinental lithosphere mantle (SCLM ). In this study, the mineral inclusions in diamond and xenoliths from Mengyin (Shandong Province) and Fuxian (Liaoning Province) kimberlites were chosen for constraining the nature of the Paleozoic SCLM. while xenoliths from the Shanwang and Qixia basalt (both in Shandong Province) were chosen for constraining the nature of the Cenozoic SCLM.Shanwang lies astride the Tancheng-Lujiang (Taulu) fault zone, a major lithospheric fault in Eastern China as well as in Eastern Asia, and Qixia lies east of the rault zone. Based on the research of the petrography of mantle xenoliths, petrochemistry, major and the trace element of mantle minerals, lithospheric thermal state, combiued with tbe modern geophysical data, it is concluded that the attenuation and replacement of Paleozoic SCLM by upwelling asthenospheric materials through thermal erosion and possibly delamination resulted in the rormation of irregular-shaPed hot bodies, mainly along weak zones within the mantle- The Tanlu fault zone played an importont role in the Mesozoic-Cenozoic replacemeni or the pre-existing lithospheric mantle. | Zheng Jianping Lu Fengxiang(Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China)O’Reilly S. Y. Griffin W. L. Zhang Ming(GEMOC, Faculty of Earth Sciences, Macquarie University, Sydney, NSW2113, Australia) | 1999 | Journal of Earth Science1999，18，3： | 1 |
| 13 | Preparation of MCM-41 in Industrial Scale and Its Application in Heavy Oil Processing显示文摘A series of MCM 41 molecular sieves have been prepared on an industrial scale, and the effect of preparation factors such as aging temperature, pH values on the structure and pore distribution of the MCM 41 product have been studied by using X ray diffraction(XRD), thermogravimetric(TG) and electron microscopy(TEM). It is shown that the pH values have a significant effect on the crystallinity of the synthesized product. Under proper conditions, the MCM 41 prepared on an industrial scale has the same performance as the samples prepared on an Lab scale. The prepared MCM 41 was used as a modifier of zeolite Y for fluid catalytic cracking(FCC) of residual oil. It is shown that the addition of the MCM 41 in the zeolite Y catalyst increases the pore size, and surface area of the catalysts, which helps to increase the yield of gasoline and diesel and decrease the production of gaseous product and carbon deposition in the catalyst. The better performance of the MCM 41 modified zeolite Y catalyst is believed to be due to its adjustment on the acidity and increase of the pore size. | Jianwen Da 1,2 , Tiancun Xiao 2, Jianming Su 1, Xingzhong Xu 1 and Malcolm. L. H. Green 2,* 1. Research Institute of Qilu Petrochem. Corp., Zibo 255400, China 2. The Wolfson Catalysis Centre, Inorganic Chemistry Laboratory, University of O | 2002 | Chemical Research in Chinese Universities2002，18，2： | 1 |
| 14 | An emergy evaluation of the seven years’development of Qianyanzhou ecological experimental station显示文摘IBackgroundofEstablishingQianyanzhouExperimentalStationChinaisacountrywithahugepopulationofl2bilion,yet,itisstilincreasingw... | YAN Maichao Commission for Integrated Survey of Natural Resources, Chinese Academy of Sciences, Beijing 100101 CHINA H T O dum Center for Environmental Policy, Department of Environmental Engineering Sciences, University of Florida, Gainesville, | 1998 | Journal of Geographical Sciences1998，8，3： | 1 |
| 15 | Magnetic, Geochemical and Mineralogical Charac teristics of Soils in Qiangtang Basin, Tibet, China: Implications for Prospective Oil and Gas Land显示文摘The alteration of iron bearing minerals induced by hydrocarbon microseepage above oil/gas reservoirs has been evaluated using measurements of soil magnetic susceptibility κ , geochemical compositions (gas hydrocarbon and alteration carbonate Δ C ), and composition and concentration of iron bearing minerals. The analyses were performed along two profiles across the Qiangtang basin in Tibet, China: the Nuoermahu Xuehuanhu profile (C) and the Mugari Huochetoushan profile (E). Results show that three strong magnetic anomalies (C 1, E 1 and E 2 anomalies) are related to the distribution of Neogene volcanic rocks on the surface in the Gangmacuo Xiyaergang uplift. Two other anomalies (C 2 and E 4 anomalies), characterized by both moderately amplitude magnetic susceptibility and elevated soil gas hydrocarbons, occur near fault zones in the Cuoni Donghu synclinorium. These latter anomalies display characteristics of hydrocarbon microseepage anomalies commonly associated with oil and gas accumulations. Their presence in the Cuoni Donghu synclinorium suggests that parts of the Qiangtang basin may have significant petroleum potential. | Liu Qingsheng Department of Geophysics, China University of Geosciences, Wuhan 430074 The State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation of China, Institute of Chengdu Technology, Chengdu 610059 Wu Qifan Li Haixia Department o | 2001 | Journal of China University of Geosciences2001，12，2： | 1 |
| 16 | Simulation in undergraduate medical education: bridging the gap between theory and practice显示文摘 | Wellington SM University O | 2004 | Med Edu2004，38，1： | 1 |
| 17 | Almandine megacrysts from Yingfengling Cenozoic basalt in Leizhou Peninsula and their parental magma origin显示文摘The garnet megacrysts from Yingfengling basalts are characterlzed by high FeO (>20%), CaO (7.02% -8.16%) and low MgO (5.88%-10.87%). Significant composition variations are observed in these megacrysts, of which Ni, V, Sc, Co, and HREE are positively correlated with their Mg# and Zr, Hf, Ga, Y, Sr, Nb, Zn and LREE-MREE are negatively correlated with Mg#. Megacryst parent magma is a highly evolved residual melt with strongl depletion in Ti, Sr, Hf, Nb and HREE. This parental magma was generated by more than 60% of crystallization fractionation of clinopyroxene, garnet, plagioclase and ilmenite from quartz tholeiitic magma. It has not erupted to the surface, but stayed at the upper mantle and formed the megacrystic cumulate. Megacrysts and their host basalt are in disequilibrium. | YU Jinhai & S. Y. O’Reilly1. National Key Laboratory of Metallogenic Mechanism of Endogenetic Deposits, Department of Earth Sciences, Nanjing University, Nanjing 210093, China 2. National Key Center of GEMOC, Department of Earth and Planetary Sciences, Macquarie University, North Ryde, NSW 2109, Australia | 2001 | Chinese Science Bulletin2001，46，14： | 1 |
| 18 | Synthcsis, Structure and Magnetochemistry of a New Hexanuclear Manganese Oxide Complex of the Formula [Mn_6O_2 (O_2CPh)_(10)(CH_3CN)_4]显示文摘The reported X-ray structure and magnetochemical properties of [Mn6O2 (OCPh)10, (CH3CN)4], effectively derived from [NBu4][Mn4O2(O2CPh)9 (H2O)] with equivalent of tren in CH3CN is shown. | Jin AN Zhi Da CHEN Jiang BIAN Shi Xi WANG Guang Xian XU (Department of Chemistry, Peking University, Beijing 100871)(State Key Laboratory of Rare Earth Materials Chemistry and Applications, Rare Earth Materials and Bio-inorganic Chemistry Laboratory o | 1999 | Chinese Chemical Letters1999，10，8： | 0 |
| 19 | Engineering Drawing Education Reform and Digital Technology显示文摘The way of reform and development of Engineering Drawing education is explored. Such activities have been carried out for 5 years, and great progress in the update of course contents, teaching methods and other related aspects is achieved. A series of textbooks, multimedia CD and established a Web site for Engineering Drawing course have been published. The efforts to realize an advanced contemporary teaching mode are being made. With the support of multimedia software and resources over Internet, students become the real main body of study, the teaching qualities are supervised and controlled throughout, and the students?imagination and ability of design and drawing are greatly enhanced. All reform is built on digital technology. | Zuo Zongyi Feng Kaiping Chen Bing Guangdong University o f Technology, Guangzhou 510090, China | 2002 | Computer Aided Drafting,Design and Manufacturing2002，12，1： | 0 |
| 20 | Studies on Electron Impact Mass Spectra of Some Anhydro-sugars显示文摘StudiesonElectronImpactMasSpectraofSomeAnhydro┐sugars*YUJian-xin**,LIUYu-ting(DepartmentofChemistry,XinjiangUniversity,Ulumuq... | YU Jian xin ** , LIU Yu ting (Department of Chemistry, Xinjiang University, Ulumuqi, 830046) WANG Yong fu, OYANG Li, DONG Ying and CAI Meng shen (School of Pharmaceutical Sciences, Beijing Medical University, Beijing, 100083) | 1997 | Chemical Research in Chinese Universities1997，13，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员