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    题名 作者 年代 出处 被引量
12019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
2Silicon carbide resonant tuning fork for microsensing applications in high-temperature and high G-shock environments显示文摘We present the fabrication and testing of a silicon carbide(SiC)balanced mass double-ended tuning fork that survives harsh environments without compromising the device strain sensitivity and resolution bandwidth.The device features a material stack that survives corrosive environments and enables high-temperature operation.To perform high-temperature testing,a specialized setup was constructed that allows the tuning fork to be characterized using traditional silicon electronics.The tuning fork has been operated at 600 ℃ in the presence of dry steam for short durations.This tuning fork has also been tested to 64 000 G using a hard-launch,soft-catch shock implemented with a light gas gun.However,the device still has a strain sensitivity of 66 Hz/με and strain resolution of 0.045 με in a 10 kHz bandwidth.As such,this balanced-mass double-ended tuning fork can be used to create a variety of different sensors including strain gauges,accelerometers,gyroscopes,and pressure transducers.Given the adaptable fabrication process flow,this device could be useful to micro-electro-mechanical systems(MEMS) designers creating sensors for a variety of different applications.David R Myers Kan Bun Cheng Babak Jamshidi Robert G Azevedo Debbie G Senesky Li Chen Mehran Mehregany Muthu B J Wijesundara Albert P Pisano 2012Engineering Sciences2012,10,5:6
3The Machine Recognition for Population Feature of Wheat Images Based on BP Neural Network显示文摘Recognition and analysis of dynamic information about population images during wheat growth periods can be taken for the base of quantitative diagnosis for wheat growth. A recognition system based on self-learning BP neural network for feature data of wheat population images, such as total green areas and leaves areas was designed in this paper. In addition, some techniques to create favorable conditions for image recognition was discussed, which were as follows: (1) The method of collecting images by a digital camera and assistant equipment under natural conditions in fields. (2) An algorithm of pixei labeling was used to segment image and extract feature. (3)A high pass filter based on Laplacian was used to strengthen image information. The results showed that the ANN system was availability for image recognition of wheat population feature.LI Shao-kun, SUO Xing-mei, BAI Zhong-ying, QI Zhi-li, Liu Xiao-hong, GAO Shi-ju and ZHAO Shuang-ning( Institute of Crop Breeding and Cultivation /Key Laboratory of Crop Genetic & Breeding, Ministry of Agriculture, ChineseAcademy of Agricultural Sciences, Beijing 100081 , P . R . China Department of Computer Science and Technology, CentralUniversity for Nationalities, Beijing 100081 , P. R . China School of Computer Science and Technology, Beijing Universityof Posts and Telecommunications, Beijing 100876, P. R . China Research Center of Xinjiang Crop High-yield,Shihezi University, Shihezi 832003, P.R. China) 2002Agricultural Sciences in China2002,1,8:4
4油炸食品与心血管病风险和全因死亡率的关系:观察性研究的荟萃分析显示文摘研究者进行了一项荟萃分析,包括剂量反应分析,以定量确定油炸食品摄入与普通成年人群心血管病风险和全因死亡率之间的关系。方法:研究者在PubMed、EMBASE和Web of Science上检索2020年4月11日之前的所有文章。应用随机效应模型估计总的相对危险度(relative risks,RR)和95%CI。结果:与最低油炸食品摄入量相比,最高摄入量者主要心血管事件的总RR(95%CI)=1.28(1.15~1.43),n=17,I^(2)=82.0%,其中前瞻性研究:1.24(1.12~1.38),n=13,I^(2)=75.7%.刘青(译) 练桂丽(审校) Qin P Zhang M Han M Liu D Luo X Xu L Zeng Y Chen Q Wang T Chen X Zhou Q Li Q Qie R Wu X Li Y Zhang Y Wu Y Hu D Hu F 2021中华高血压杂志2021,29,2:3
5The active sites of the influenza cap-dependent endnuclease are on different polymerase subunit 显示文摘Li M L Rao P Krug R M 2001EMBO J2001,20,7:1
6Growth and properties of REBiO3 new buffer materials for coated conductors 显示文摘Li G Pu M H Sun R P 2008Physica C2008,468,:1
7Survey of maneuvering target tracking- part I:Dynamic models显示文摘LI X R JIKOV V P 2003IEEE Transaction on Aerospace and Electronic Systems2003,39,4:1
8A gold electrode modified with self-assembled diethylenetri- aminepentaacetic acid via charge-based discrimination显示文摘Li J P Liu R Yu J G 2009Analytical scienes2009,25,12:1
9Aspects on interaction between multistage stabilization of polyacrylonitrile precursor and mechanical properties of carbon fibers显示文摘WANG P H YUE Z R LI R Y etal 1995Jounal of Applied Polymer Science1995,56,2:1
10Microbiotic soil crust and its effect on vegetation and habitat on artificially stabilized desert dunes in Tengger Desert, North China显示文摘Li X R Wang X P Li T 2002Biol Fertil Soils2002,35,:1
11Stability of Iterative Procedures with Errors Approximating Common Fixed Points for Qui-Contractive Mapping in q-Uniformly Smooth Banach Spaces 显示文摘Agaral R P Cho Y J Li J Huang Nan-jing 2002Math Anal Appl2002,22,:1
12Survey of Maneuvering Target Tracking - Part I : Dynamic Models 显示文摘LI X R JILKOV V P 2003IEEE Transactions on Aerospace and Electronic Systems2003,39,4:1
13Effect of combined use of nonionic surfactant on formation of oil-in-water mlcroemulsions显示文摘Li P Ghosh A Wagner R F 2005Int J Pharm2005,288,1:1
142-chlorophenol oxidation in supercritical water globalkinetics and reaction products显示文摘LI R SAVAGE P E SZMUKLER D 1993AICHE Journal1993,39,:1
15Electrical remodelling of the human atrium: Similar effects in patients with chronic atrial fibrillation and atrial flutter 显示文摘FRANZ M R KARASIK P L LI C 1997J Am Coll Cardiol1997,30,:1
16Temperature-Dependent Photoluminescence of ZnO Nanorods Prepared by a Simple Solution Route显示文摘Lv Y Z Zhang Y H Li C P Ren L R Guo L Xu H B Ding L Yang C L Ge W K and Yang S H 2007Luminescence2007,,:1
17Microbiotic soil crust and its effect on vegetation and habitat on artificially stabilized desert dunes in Tengger desert, north China显示文摘Li X R Wang X P Li T 2002Biology and Fertility of Soils2002,35,3:1
18Estimation of railway vehicle suspension parameters for condition monitoring显示文摘LI P GOODALL R WESTON P 2006Control Engineering Practice2006,15,1:1
19Equilib- rium modeling of gasification: a free energy minimization approach and its application to a circulating fluidized bed coal gasifier显示文摘LI X GRACE J R WATKINSON A P 2001Fuel2001,80,2:1
20Nutrition intervention trials in Linxian,China:supplementation with specific vitamin/mineral combinations,cancer incidence,and disease-specific mortality in the general population 显示文摘BLOT W J LI J Y TAYLOR P R 1993Journal of the National Cancer Institute1993,85,18:1
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