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| 1 | 2019新型冠状病毒基因组特征和流行病学:病毒起源和受体结合的意义显示文摘研究者对来自9例新型冠状病毒肺炎住院患者的支气管肺泡灌洗液样本和培养的分离株进行了下一代测序。从这些个体中获得了严重急性呼吸综合征-冠状病毒2(severe acute respiratory syndrome-coronavirus 2,SARS-CoV-2)的完整和部分基因组序列。利用Sanger测序连接病毒重叠群以获得全长基因组,cDNA末端快速扩增确定终端区。对这些SARSCoV-2基因组和其他冠状病毒基因组进行了系统进化分析,以确定该病毒的进化史并有助于推断其可能的起源。 | 刘青(译) 刘莉(审校) Lu R Zhao X Li J Niu P Yang B Wu H Wang W Song H Huang B Zhu N Bi Y Ma X Zhan F Wang L Hu T Zhou H Hu Z Zhou W Zhao L Chen J Meng Y Wang J Lin Y Yuan J Xie Z Ma J Liu WJ Wang D Xu W Holmes EC Gao GF Wu G Chen W Shi W Tan W | 2020 | 中华高血压杂志2020，28，3： | 516 |
| 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 | Effects of topical epinephrine on aqueous humor dynamics in the cat显示文摘 | Wang YL Toris CB Zhan G | 1999 | Exp Eye Res1999，68，4： | 1 |
| 4 | Simulation for guideroll in 3D-FE analysis of cold ring rolling 显示文摘 | GUO L G YANG H ZHAN M LI H LI L Y | 2004 | Mater Sci Forum2004，，： | 1 |
| 5 | Indenpendent associations of serum concentrations of 25-hydroxy vitamin D显示文摘 | Zhan G Focr Es L C | 2010 | J Hypertens2010，28，9： | 1 |
| 6 | Friction and wear properties of UHMWPE against ion implanted titanium alloy显示文摘 | Xiong DS Zhan G Jin ZG | | 0，，15： | 1 |
| 7 | Single-wall carbon nanotubes as attractive toughening agents in alumina based nanoeomposites显示文摘 | ZHAN G D KUNTZ J D WAN J L | 2003 | Nature Materials2003，2，1： | 1 |
| 8 | Performance of an unsaturated expansive soil slope subjected to artificial rainfall infiltration显示文摘 | NGCW W ZHAN L T BAO C G etal | 2003 | Geotechnique2003，53，2： | 1 |
| 9 | Pro- gress in HIRFL CSR显示文摘 | ZHAN W L XU H S XIAO G Q | 2010 | Nuclear Physics A2010，834，69： | 1 |
| 10 | Thermally stable light- emitting polymers of substituted polyaoetylenes显示文摘 | YU G LIU Y Q ZHAN X W | 2000 | Thin Solid Films2000，363，： | 1 |
| 11 | Some advanced plastic processing technologies and their numerical simulation显示文摘 | Yang H Zhan M Liu Y L Xian F J Sun Z C Lin Y Zhang X G | 2004 | J Mater Process Technol2004，151，13： | 1 |
| 12 | ABT-263 sensitizes TRAIL-resistant hepatocarcinoma cells by downregulating the Bcl-2 familyof anti-apoptotic protein显示文摘 | Wang G Zhan Y Wang H | 2012 | Cancer Chemother Pharmacol2012，69，3： | 1 |
| 13 | Enhanced binding of Aspergillus fumigatus spores to A549 epithelial ceils and extraeellular matrix proteins by a component from the spore surface and inhibition by rat lung lavage fluid 显示文摘 | ZHAN Y STEPHANIE M H COLIN G M | 2000 | Thorax2000，55，10： | 1 |
| 14 | Giant magnetic-field-induced strains in Heusler alloy NiMnGa with modified composition显示文摘 | WU G H YU C H MENG L Q CFIEN J L YANG F M QI S R ZHAN W S WANG Z ZHENG Y F ZHAO L C | 1999 | Appl Phys Lett1999，75，19： | 1 |
| 15 | Size exclusion chromato-graphy with Corona charged aerosol detector for the analysisof polyethylene glycol polymer显示文摘 | Kou D Manius G Zhan S | 2009 | J Chromatogr A2009，1216，28： | 1 |
| 16 | Lathyranoic acid A:Firstsecolathyrane diterpoid in nature from Euphorbia lathyris显示文摘 | Liao S G Zhan Z J Yang S P | 2005 | OrgLett2005，7，7： | 1 |
| 17 | Research on plastic deformationbehavior in cold ring rolling by FEM numerical simulation 显示文摘 | GUO L G YANG H ZHAN M | 2005 | Modelling Simul Mater Sci Eng2005，13，： | 1 |
| 18 | Retrieval of water optical properties for optically deep waters using genetic algorithms显示文摘 | Zhan H G Lee Z P | 2003 | IEEE Geoscience and Remote Sensing2003，41，： | 1 |
| 19 | Autonomous navigation and guidance scheme for precise and safe planetary landing显示文摘 | Li S Zhan g L | 2009 | Aircraft Engineering and Aerospace Technology:An International Journal2009，81，6： | 1 |
| 20 | 显示文摘 | Li R G Zhan Y H Zhu L G | 2012 | Journal of Applied Poly- mer Science2012，124，3： | 1 |
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