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| 1 | Clinical implication of VEGF serum levels in cirrhotic patients with or without portal hypertension显示文摘INTRODUCTIONAngiogenesisorformationofnewbloodvesels,isatightlyregulatedprocesinwhichbloodveselssupplygrowingtisuewithnutrient... | Nimer Assy 1,4 , M Paizi 3,4 , D Gaitini 2, Y Baruch 1,4 and G Spira 3,4,5 | 1999 | World Journal of Gastroenterology1999，5，4： | 35 |
| 2 | A Study on 3D FE Simulation Method of NC Bending Process of Thin-walled Tube显示文摘The numerical control (NC) precision bending process of thin-walled tube is on e of advanced plastic forming processes with high efficiency, forming precision, strength/weight ratio and low cost, thus it is playing more and more important role in manufacturing parts in aerospace and automobile industries. However, the determination of parameters crucial to make sure tube parts qualified is heavil y experience-based and involves repeated trial-and-errors in practice, which makes the production efficiency reduce drastically and does not fulfill the deve lopment of high technology. With quick development of computer technology and gr adual perfect of plastic forming theory, computer numerical simulation based on finite element method (FEM) has become one of important tools of researching and developing plastic forming technology. Development trend of NC precision bendin g process of tube is simulating its forming process by FEM. Because NC tube bend ing is of 3D nature, it is of great importance to analyze the forming mechanism and find out the influence law of forming parameters on forming process in the N C precision bending process of thin-walled tube quantitatively by 3D FE simulat ion. Based on the rigid-plastic finite element method (FEM) principle, a 3-dimens ional (3D) rigid-plastic FE simulation system named TBS -3D (tube bending simu lation by 3D FEM) for the NC bending process of thin-walled tube has been devel oped, a reasonable FEM model has been established. By use of this FEM simulation system, a NC bending process of thin-walled has been simulated. And deformed m eshes under different bending stages, stress distribution along bending directio n, relationship between maximal wall thickness changing ratio and bending angle have been obtained. And then some forming laws of NC tube bending obtained are a s follows: (1) NC bending process make tube elongate to some extent; (2) Charact eristic of stress distribution is that the outer area is undergoing tensile stre ss, the inner area is undergoing compression stress, and stress neutral layer mo ves close to the inner area, which is in good accordance with the practice; (3) Maximal wall thinning ratio in the outer tensile area changes only a little with increase of bending angle, and maximal wall thickening ratio in the inner compr ession area increases linearly with bending angle. The above results show that 3 D FE simulation is an important and valid tool of analyzing NC bending process o f tube, this research is beneficial for the practical tube bending process, and it may serve as a significant guide to the practice of the relevant processes. | ZHAN Mei 1, YANG He 1, JIANG Zhi-qiang 2, ZHAO Zhen-son g 1, LIN Yan 1 (1. College of Materials Science and Engineering, Northwestern Polytech nical University, Xi’an 710072, China 2. Xi’an Heavy Machinery Research Institute, Xi’an 71003 2, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 3 |
| 3 | 0.075 Gy X 射线诱导EL-4细胞凋亡及细胞周期的适应性反应显示文摘观察低剂量X射线照射能否诱导EL-4细胞凋亡及细胞周期的适应性反应。方法采用流式细胞术(FCM)检测细胞凋亡及细胞周期。结果单纯2GyX射线照射后12小时EL-4细胞凋亡显著增多,并伴有明显G1阻滞;0.075Gy预照射可明显减轻间隔6小时后2Gy攻击剂量照射所致的细胞凋亡和G1阻滞。结论0. | 范冰 鞠桂芝 hour after irradiation accompanied by G0/G1 phase block.However preirra | 1998 | 中华放射医学与防护杂志1998，18，2： | 3 |
| 4 | Fabrication and characterization of rugate structures composed of SiO_2 and Nb_2O_5显示文摘Gradient index layers and rugate structures were fabricated on a Leybold Syrus pro deposition system by plasma-assisted coevaporation of the low index material silica and the high index material niobium pentoxide. To obtain information about the compositional profiles of the produced layers, cross sectional transmission electron microscopy was used in assistance to deposition rate data recorded by two independent crystal monitors during the film preparation. The depth dependent concentration profiles were transformed to refractive index gradients by means of effective medium approximation. Based on the refractive index gradients the corresponding samples` transmission and reflection spectra could be calculated by utilizing matrix formalism. The relevance of the established refractive index profiles could be verified by comparison of the calculated spectra with the measured ones. | R. Leitel O. Stenzel S. Wilbrandt 1 D. Gbler V. Janicki N. Kaiser | 2005 | 光学精密工程2005，13，4： | 2 |
| 5 | A Mathematical Model on Vacuum Chamber of a Multifunctional RH-degasser显示文摘A 3D-mathematical model was developed for the simulation of gas flow, combustion and heat convection in RH vacuum chamber. Under different conditions, the influences of the Kawasaki Oxygen Top Blowing system (KTB) on the gas flow, chemical reactions and temperature distributions were calculated based on the model. The optimum position of the lance is suggested for the RHKTB degassing process. | Yisheng Chen, Youduo He, Daqiang Cang, Zongze Huang 1) Institute of Metallurgical Engineering, UIST, Baotou 014010, China 2) Metallurgy School, University of Science and Technology Beijing. Beijing 100083. China 3) Technical Centre, Baoshan Iron & steel G | 2001 | Journal of University of Science and Technology Beijing2001，8，4： | 2 |
| 6 | Tumor necrosis factor induction by an aqueous phenol-extracted lipopolysac-charide complex from Bacteroides species 显示文摘 | Delahooke D M Barclay G R Poxton 1 R | 1995 | Infect Immun1995，63，3： | 1 |
| 7 | Early experience in robot -assisted laparoscopic Heller myotomy显示文摘 | Ruurda J P Gooszen H G Broeders 1 A | 2004 | Scand J Gastroenterol Suppl2004，，241： | 1 |
| 8 | Neutral cel-lulases of mycelial fungi: Searching for producers and their characterization 显示文摘 | Soloveva 1 V Qkunev Q N Kryukora E G | 1997 | Biochem Microbiology1997，33，4： | 1 |
| 9 | Electrical triggering of metal-insulator transition in nanoscale vanadium oxide junctions显示文摘 | Ruzmeto 1 D Gnpalakrisbnan G Deng J D | 2009 | Journal of Applied Physics2009，106，08： | 1 |
| 10 | Environmental risk as- sessment: A critical approach of the European TGD in an in situ application 显示文摘 | Gu e rit 1 Boequen e G James A | 2008 | Ecotoxicology and Environmental Safety2008，71，9： | 1 |
| 11 | Mechani- cal Properties of a Material at Ultrahigh Strain Rates In-duced by a Laser Shock Wave 显示文摘 | BATANI D VOVCHENKO V 1 KANEL G 1 | 2003 | Doklady Physics2003，48，3： | 1 |
| 12 | Effect of variety, soil type and fertilizer on the establishment, growth, forage yield, quality and voluntary intakeby eattle of oats and vetches cultivated in pure stands and mixtures 显示文摘 | Assefa G Ledin 1 | 2001 | Animal Feed Science and Technology2001，92，： | 1 |
| 13 | Survey of the protenlytic activities degrading the kunitz trypsin inhibitor and glycinin in germination soybean (Glyzine max ) 显示文摘 | Wilson K A Papastoitsis G Hart1 P Tan-Wilson A 1 | 1988 | Plant Physiology1988，88，2： | 1 |
| 14 | The proximal biceps as a pain gene- rator and results of tenotomy 显示文摘 | Szabo 1 Boileau P Waleh G | 2008 | Sports Med Arthrosc2008，16，3： | 1 |
| 15 | Contribution of surgery in patients with bulky residual disease after chemoradiation for advanced cervical carcinoma显示文摘 | Houvenaeghel G Lelievre 1 Buttarelli M | 2007 | Eur J Surg Oncol2007，33，4： | 1 |
| 16 | K-homology显示文摘 | KASPAROV G Topological invariants of elliptic operators 1 | 1975 | Math USSR1975，9，： | 1 |
| 17 | Clinical efficacy of a RAF inhibitor needs broad target blockade in BRAF -mutant melanoma显示文摘 | Bollag G Hirth P Tsai 1 | 2010 | Nature2010，467，7315： | 1 |
| 18 | The Case of AntitakeoverCharter Amendments显示文摘 | Agrawa 1 A G · Mandelker | | 0，，25： | 1 |
| 19 | Extraction of titanium, vanadium and iron from titanmagnetite deposits at pipestone lake, Manitoba, Canada显示文摘 | Jena B C Dredler W Reilly 1 G | 1998 | Minerals Engineering1998，8，12： | 1 |
| 20 | The diagnostic and prognostic significance of soluble urokinase plasminogen activator receptor in systemic inflammatory response syndrome显示文摘 | Yilmaz G Koksal 1 Karahan S C | 2011 | Clinical biochemistry2011，44，14： | 1 |
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