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356篇 您的检索式:作者名="HU Teng"
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1Identification of a novel coronavirus causing severe pneumonia in human:a descriptive study显示文摘Background:Human infections with zoonotic coronaviruses(CoVs),including severe acute respiratory syndrome(SARS)-CoV and Middle East respiratory syndrome(MERS)-CoV,have raised great public health concern globally.Here,we report a novel batorigin CoV causing severe and fatal pneumonia in humans.Methods:We collected clinical data and bronchoalveolar lavage(BAL)specimens from five patients with severe pneumonia from Wuhan Jinyintan Hospital,Hubei province,China.Nucleic acids of the BAL were extracted and subjected to next-generation sequencing.Virus isolation was carried out,and maximum-likelihood phylogenetic trees were constructed.Results:Five patients hospitalized from December 18 to December 29,2019 presented with fever,cough,and dyspnea accompanied by complications of acute respiratory distress syndrome.Chest radiography revealed diffuse opacities and consolidation.One of these patients died.Sequence results revealed the presence of a previously unknownβ-CoV strain in all five patients,with 99.8%to 99.9%nucleotide identities among the isolates.These isolates showed 79.0%nucleotide identity with the sequence of SARS-CoV(GenBank NC_004718)and 51.8%identity with the sequence of MERS-CoV(GenBank NC_019843).The virus is phylogenetically closest to a bat SARS-like CoV(SL-ZC45,GenBank MG772933)with 87.6%to 87.7%nucleotide identity,but is in a separate clade.Moreover,these viruses have a single intact open reading frame gene 8,as a further indicator of bat-origin CoVs.However,the amino acid sequence of the tentative receptor-binding domain resembles that of SARS-CoV,indicating that these viruses might use the same receptor.Conclusion:A novel bat-borne CoV was identified that is associated with severe and fatal respiratory disease in humans.Li-Li Ren Ye-Ming Wang Zhi-Qiang Wu Zi-Chun Xiang Li Guo Teng Xu Yong-Zhong Jiang Yan Xiong Yong-Jun Li Xing-Wang Li Hui Li Guo-Hui Fan Xiao-Ying Gu Yan Xiao Hong Gao Jiu-Yang Xu Fan Yang Xin-Ming Wang Chao Wu Lan Chen Yi-Wei Liu Bo Liu Jian Yang Xiao-Rui Wang Jie Dong Li Li Chao-Lin Huang Jian-Ping Zhao Yi Hu Zhen-Shun Cheng Un-Lin Liu Zhao-Hui Qian Chuan Qin Qi Jin Bin Cao Jian-Wei Wang 2020Chinese Medical Journal2020,,9:99
2外刊拾贝显示文摘1.根据2018年美国糖尿病学会标准诊断中国糖尿病患病率:全国横断面研究目的:评估糖尿病患病率及其危险因素。设计:基于人群的横断面研究。背景:2015-2017年中国大陆31省份全国横断面数据。调查对象:75880名18周岁及以上代表中国大陆人口的成年人样本。主要观察指标:根据2018年美国糖尿病学会和世界卫生组织标准诊断中国成人不同性别、区域和种族的糖尿病患病率。通过问卷的方式记录调查对象的社会人口学信息、生活方式和疾病史。单忠艳 Li Y Teng D Shi X Ba J 王看然 李启富 Wang K Hu J Yang J 2020国际内分泌代谢杂志2020,40,5:42
3One-step generation of p53 gene biallelic mutant Cynomolgus monkey via the CRISPR/Cas system显示文摘Haifeng Wan Chunjing Feng Fei Teng Shihua Yang Baoyang Hu Yuyu Niu Andy Peng Xiang Weizhen Fang Weizhi Ji Wei Li Xiaoyang Zhao Qi Zhou 2015Cell Research2015,25,2:39
4Transplantation of magnetically labeled mesenchymal stem cells improves cardiac function in a swine myocardial infarction model显示文摘背景:间充质的干细胞(MSC ) 移植为心肌的修理提供一条新途径。然而,关于 MSC 移植的许多重要基本问题仍然保持未答复。有迫切需要从跳动的心识别 MSC 并且分析这条新途径的功效。试图本地化有磁力地标记的 MSC (MR-MSCs ) 并且监视补药的这研究与磁性的回声(先生) MR-MSCs 完成成像。方法:尖锐心肌的梗塞(AMI ) 被左前面的下降冠的动脉的汽球吸藏在猪创造。房间在心肌的梗塞以后经由 intracoronary 注入被交付。梗塞尺寸变化和心脏的功能与 3.0T 先生扫描仪被估计。结果然后被组织学、西方的污点分析证实。所有统计过程与 Systat (社会科学统计套装软体版本 12.01 ) 被执行。结果:26 猪的一个总数被划分成四个组(假冒操作组, n=6;有 PBS 移植的 AMI 组, n=6;标记的 MSC 组, n=7;未标记的 MSC 组, n=7 ) 。MSC, MR-MSCs (10 (7 ) 房间) 或在 MI 和连续心脏的先生成像研究在移植以后在 0, 4 和 8 个星期被执行以后, PBS 被 intracoronary 注射交付。先生成像证明 MI 尺寸在 MSC 移植以后减少了在标记并且未标记的组然而,增加在 MI 以后在 8 个星期在 AMI 组被看见。左室的喷射部分( LVEF )稍微在 AMI 组被增加(( 41.87+/-2.45 )%对( 39.04+/-2.80 )%, P>0.05 ),但是显著地在 MR-MSCs 组改善了(( 56.85+/-1.29 )%对( 40.67+/-2.00 )%, P<0.05 )并且未标记的组(( 55.38+/-1.07 )%对( 41.78+/-2.08 )%, P<0.05 )在 8 星期术后疗法。MR-MSCs 被普鲁士的蓝色和免疫进一步证实荧光灯的染色。西方的污点分析证明在 MSC 处理组和矩阵 metalloproteinase 的比率有象肌浆球蛋白重链和 troponin T 那样的 cardiomyocyte 标记的增加的表情 2 到 metalloproteinase 的织物禁止者, 1 与 AMI 组和假冒操作组相比在标记的组和未标记的组减少了。结论:移植 MR-MSCs 能改革新心肌层并且在 2 月的后续在一个 MI 模型阻止 remolding 并且代表一个比较喜欢的方法更好在未来理解干细胞治疗的机制临床的研究。QI Chun-mei MA Gen-shan LIU Nai-feng SHEN Cheng-xing CHEN Zhong LIU Xiao-jun HU Yao-peng ZHANG Xiao-li TENG Gao-jun JU Sheng-hong MA Ming TANG Yao-liang 2008Chinese Medical Journal2008,,6:19
5A 5-DOF Model for Aeroengine Spindle Dual-rotor System Analysis显示文摘This paper develops a five degrees of freedom(5-DOF) model for aeroengine spindle dual-rotor system dynamic analysis.In this system,the dual rotors are supported on two angular contact ball bearings and two deep groove ball bearings,one of the latter-mentioned bearings works as the inter-shaft bearing.Driven by respective motors,the dual rotors have different co-rotating speeds.The proposed model mathematically formulates the nonlinear displacements,elastic deflections and contact forces of bearings with consideration of 5-DOF and coupling of dual rotors.The nonlinear equations of motions of dual rotors with 5-DOF are solved using Runge-Kutta-Fehlberg algorithm.In order to investigate the effect of the introduced 5-DOF and nonlinear dy-namic bearing model,we compare the proposed model with two models:the 3-DOF model of this system only considering three translational degrees of freedom(Gupta,1993,rotational freedom is neglected);the 5-DOF model where the deep groove ball bearings are simplified as linear elastic spring(Guskov,2007).The simulation results verify Gupta's prediction(1993) and show that the rotational freedom of rotors and nonlinear dynamic model of bearings have great effect on the system dynamic simula-tion.The quantitative results are given as well.HU Qinghua DENG Sier TENG Hongfei 2011Chinese Journal of Aeronautics2011,24,2:18
6Adenovirus-mediated expression of both antisense ODC and AdoMetDC inhibited colorectal cancer cell growth in vitro显示文摘瞄准:为了构造 recombinant 侵入人体气管粘膜的病菌,那能同时表示两反感觉鸟氨酸脱羧酶(ODC ) 和 adenosylmethionine 脱羧酶(AdoMetDC ) 并且在细胞内部的聚胺水池上检测它的禁止的效果并且渲染表面的癌症房间生长。方法:AdoMetDC 的 A 205-bp cDNA 是插入颠倒的进 recombinant pAdTrack-ODCas 向量并且在 AdEasy-1 房间与 pAdEasy-1 向量重新结合。积极克隆被选择并且 transfected 进包装房间 HEK293 在以后他们被 PacI 线性化。格林荧光灯的蛋白质表示被用来监视包装的侵入人体气管粘膜的病菌的进程。ODC 和 AdoMetDC 蛋白质层次被西方的弄污识别,并且细胞内部的聚胺内容被反向阶段的高效液相色谱法检测。一个可行房间计数被用来决定 HT-29 房间的生长与或没有外长的聚胺。结果:定序证实 AdoMetDC cDNA 成功地被绑扎进 pAdTrack-ODCas 向量。在 293 个房间的 GFP 表示被萤光显微镜检查在病毒收拾行李和扩大期间观察。西方的弄污证明 ODC 和 AdoMetDC 低由 Ad-ODC-AdoMetDCas 调整了,并且因而, 3 种聚胺(腐胺,亚精胺和精胺) 被归结为很底层。当与控制条件,和生长相比拘捕没被外长的腐胺颠倒, HT-29 细胞生长显著地被禁止。结论:成功地构造的 recombinant 侵入人体气管粘膜的病菌, Ad-ODC-AdoMetDCas,堵住的聚胺合成并且为对待颜色有治疗学的潜力表面的癌症在试管内。Bing ZHANG Xian-xi LIU Yan ZHANG Chun-ying JIANG Qing-shan TENG Hai-yan HU Wei WANG Lei GONG 2006Acta Pharmacologica Sinica2006,27,3:17
7Ground moving target signal model and power calculation in forward scattering micro radar显示文摘Forward scattering micro radar is used for situation awareness;its operational range is relatively short because of the battery power and local horizon,the free space propagation model is not appropriate. The ground moving targets,such as humans,cars and tanks,have only comparable size with the transmitted signal wavelength;the point target model and the linear change of observation angle are not applicable. In this paper,the signal model of ground moving target is developed based on the case of forward scattering micro radar,considering the two-ray propagation model and area target model,and nonlinear change of observation angle as well as high order phase error. Furthermore,the analytical form of the received power from moving target has been obtained. Using the simulated forward scattering radar cross section,the received power of theoretical calculation is near to that of measured data. In addition,the simulated signal model of ground moving target is perfectly matched with the experimented data. All these results show the correctness of analytical calculation completely.LONG Teng HU Cheng MIKHAIL Cherniakov 2009Science in China(Series F)2009,52,9:12
8The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart 2019Science China(Physics,Mechanics & Astronomy)2019,62,2:11
9Modelling and mapping soil erosion potential in China显示文摘Soil erosion is an important environmental threat in China.However,quantitative estimates of soil erosion in China have rarely been reported in the literature.In this study,soil loss potential in China was estimated by integrating satellite images,field samples,and ground observations based on the Revised Universal Soil Loss Equation(RUSLE).The rainfall erosivity factor was estimated from merged rainfall data using Collocated CoKriging(ColCOK)and downscaled by geographically weighted regression(GWR).The Random Forest(RF)regression approach was used as a tool for understanding and predicting the relationship between the soil erodibility factor and a set of environment factors.Our results show that the average erosion rate in China is 1.44 t ha^(–1) yr^(–1).More than 60%of the territory in China is influenced by soil erosion limitedly,with an average potential erosion rate less than 0.1 t ha^(–1) yr^(–1).Other unused land and other forested woodlands showed the highest erosion risk.Our estimates are comparable to those of runoff plot studies.Our results provide a useful tool for soil loss assessments and ecological environment protections.TENG Hong-fen HU Jie ZHOU Yue ZHOU Lian-qing SHI Zhou 2019Journal of Integrative Agriculture2019,18,2:11
10Physical modeling and spectrum spread analysis of surface clutter in forward scattering radar显示文摘In this paper, based on the processing results of measured clutter data in forward scattering radar, a special phenomenon that the clutter spectrum spread is insensitive to the wind speed and carrier frequency is observed. The pendulum model is first time introduced into the physical modeling and formation mechanism analysis of surface clutter, and the quantitative expression of clutter spectrum spread is analytically obtained. Under the assumption of pendulum model, the processing results of measured clutter data agree well with the results of theoretical analysis, which fully verifies the correctness of pendulum model and reveals the formation mechanism of surface clutter spectrum in forward scattering radar. Furthermore, according to the stability of clutter spectrum spread with respect to carrier frequencies and wind speed, the optimal cutofrequencies of clutter filter can be obtained, which establishes the basis for moving target detection and accurate parameters estimation.LONG Teng, HU Cheng, ZENG Tao & LI XiaoLiang Radar Research Laboratory, Department of Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China 2010Science China(Information Sciences)2010,53,11:11
11Statistic characteristic analysis of forward scattering surface clutter in bistatic radar显示文摘In this paper,based on the processing results of measured forward scattering clutter data in bistatic radar,using the Gaussian distribution model,Exponential distribution model,Power-Law distribution model,high order Auto-Regressive model and so on,the probability density distribution and power spectrum mathematical model are obtained,and the impact of clutter statistic models on target detection performance is analytically derived from statistic theory.According to the estimated clutter probability distribution,power spectrum model and generalized matching filter theory,the forward scattering clutter in bistatic radar is effectively suppressed and the target motion parameters are accurately estimated from the measured clutter data.HU Cheng ,LONG Teng & ZENG Tao Radar Research Lab,Department of Electronic Engineering,Beijing Institute of Technology,Beijing 100081,China 2010Science China(Information Sciences)2010,53,12:11
12Research on crystal growth and properties of a new nonlinear optical crystal:Bismuth borate BiB_3O_6显示文摘BiB3O6 (BIBO) single crystals with sizes of 44 mm × 24 mm × 10 mm and weight of 24.7 g have been successfully grown by the top-seeded method. In this note, the preparation of seed, the growth of crystal and some problems encountered are reported. The lattice parameters of BIBO are a =7.1203(7)A, b = 4.9948(7)A, c = 6.5077(7)A, β= 105.586(8) ', V=222.93(5)A3, which were determined by BRUKER-P4 four-circle diffractometer. BIBO is biaxial crystal and the relative orientation of (X, Y, Z) with regard to (a, b, c) is: X|| b, (Y, c) =47.2°, (Z, a) = 31.6°, determined by the X-ray analysis combined with polarized microscopy. The second-harmonic-generation (SHG) conversion efficiency of the sample for 1.064 μm light is up to 67.7%. We have also obtained the third harmonic generation (THG) of 1.064 μm, namely, 1.064 μm + 0.532 μn →0.355 μm. BIBO crystal is free of moisture and hygroscopy.TENG Bing, WANG Jiyang, WANG Zhengping, JIANG Huaidong, SONG Renbo, LIU Hong, HU Xiaobo, LIU Yaogang, WEI Jingqian & SHAO ZongshuState Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100, China 2001Chinese Science Bulletin2001,46,21:10
13A high-fat diet reverses improvement in glucose tolerance induced by duodenal-jejunal bypass in type 2 diabetic rats显示文摘背景 Bariatric 外科为类型 2 糖尿病 mellitus ( T2DM )的成功的分辨率提供 .However , T2DM 的复发在学习试图在 duodenal-jejunal 以后在 T2DM 老鼠导致糖尿病的改进的颠倒的 bariatric surgery.This 以后与起始的分辨率在很多个病人被观察了绕过( DJB ),并且识别可能是 involved.Methods DJB 外科的重量变化和内脏荷尔蒙的效果在二个 T2DM 老鼠模型(为每个组的 n=20 )被执行:非肥胖的 Goto-Kakizaki 然而,他们不在 HFD 颠倒的喂 HFD 、喂 LFD 的 rats.Conclusion 之间是显著地不同的在葡萄糖忍耐的改进在 T2DM 老鼠由 DJB 外科导致了,首先归功于到胰岛素敏感的重新缺陷,但是不改变身体重量, GLP-1 和 PYY 层次。LIU Shao-zhuang SUN Dong ZHANG Guang-yong WANG Lei LIU Teng SUN Yu LI Ming-xia HU San-yuan 2012Chinese Medical Journal2012,,5:10
14Localization and Dynamic Change of Saponin in Vegetative Organs of Polygala tenuifolia显示文摘Anatomical,histochemical and phytochemical methods were used to investigate the structure,localization and dynamic changes of total saponin and senegenin of vegetative organs in Polygala tenuifolia Willd.Histochemical localization results showed that saponin accumulated mainly in parenchyma cells of vegetative organs.The phytochemical results also showed that the saponin accumulated in the vegetative organs of P.tenuifolia,with higher content in roots and lower content in the aerial parts that included stems and leaves.The saponin content and dry weight of the vegetative organs of P.tenuifolia had dynamic variance at the developmental stages and all reached the highest level in the post-fruit period.Hence,the roots and aerial parts should be gathered in August to make full use of the plant.As the root is the main medicinal organ of P.tenuifolia,the content of total saponin and senegenin of different aged and different parts of the root were determined.The content of total saponin and senegenin exhibited a sustained decreasing trend with increasing root age; therefore,the annual roots had high quality.The content of total saponin and senegenin in different parts of the root showed obvious variation.The content in the 'skin areas' was much higher than that of xylem.The results offer a theoretical basis for determining the appropriate harvesting stage and a reasonable harvest of P.tenuifolia.Hong-Mei Teng Min-Feng Fang Xia Cai Zheng-Hai Hu 2009Journal of Integrative Plant Biology2009,51,6:9
15DNA damage triggers tubular endoplasmic reticulum extension to promote apoptosis by facilitating ER-mitochondria signaling显示文摘endoplasmic 蜂窝胃(嗯) 由原子信封, perinuclear 表和一个外部管状的网络组成。外设嗯并且线粒体形式在特定的子域的紧密的接触,它协调二个细胞器的函数并且为象 Ca 2+ 转移和 apoptosis 那样的多重细胞的进程被要求。然而,它大部分是未知的怎么嗯形态学并且嗯线粒体发信号动态地在象 DNA 那样的不同生理或病理学的条件下面被调整损坏。这里,我们证明外设,管状嗯响应 DNA 经历重要扩展损坏,和那这个过程依赖于嗯塑造蛋白质 REEP1, REEP2 和 EI24 (别名 PIG8 ) 的调停 p53 的 transcriptional 激活。这通过 EI24 和 mitochondrial 支持嗯线粒体接触的形成外部膜蛋白质 VDAC2,便于 Ca 2+ 转移从嗯到线粒体并且支持 DNA 导致损坏的 apoptosis。因此,我们识别包含改变在的一条唯一的 DNA 损坏反应小径嗯形态学,发信号的嗯线粒体,和 apoptosis。Pengli Zheng Qingzhou Chen Xiaoyu Tian Nannan Qian Peiyuan Chai Bing Liu Junjie Hu Craig Blackstone Desheng Zhu Junlin Teng Jianguo Chen 2018Cell Research2018,28,8:9
16A Facile Synthetic Route to L-Phosphinothricin显示文摘A convenient and effective method for synthesis of L-phosphinothricin was described.The highlight was involved in a simple access to the key intermediate L-2-amino-4-chlorobutyricacid derivative from the inexpensive L-methionine.Xue Song XU Han Bing TENG Guo Fu QIU Shu Cai LIANG Xian Ming HU 2006Chinese Chemical Letters2006,17,2:9
17An Equivalent Fundamental and Odd Harmonic Resonators Controller for a Single-phase Dynamic Voltage Restorer显示文摘为提高单相动态电压恢复器(dynamic voltage restorer,DVR)的补偿性能,提出一种基于等效基波及奇次谐波谐振器组的数字控制方法。采用可等效为一组谐振器的延时模块,能够有效抑制电网基波和谐波扰动。给出一种包含两个控制参数和一组零相移陷波滤波器的结构及其设计方法,使系统在保证稳定性的同时,获得较大的谐振增益。其中,延时环节衰减系数可增加谐振器组鲁棒性;控制器比例增益可解决零相移陷波器中使用延时带来的问题;零相移陷波器组既能对消LC谐振峰,也能解决等效谐振器组高增益在高频处的稳定性问题。同时,引入电源电压和负载电流双前馈来保证响应速度,增加了对扰动的抑制能力。所提控制策略结构简单,谐波补偿能力强,动态响应快,易于实现。在2kW单相DVR实验装置上的实验结果验证了该控制方法的正确性。HU Leilei XIAO Guochun TENG Guofei LU Yong 2012中国电机工程学报2012,32,22:9
18Analysis of the effects of mass transfer on heat transfer in the process of moisture exchange across a membrane显示文摘A theoretical study was conducted to investigate the effects of mass transfer on heat transfer in the process of moisture exchange across a membrane and a mathematical model describing the heat transfer with consideration of the effect of mass transfer was developed.A dimensionless variable,ψi,which presents the degree to which the mass transfer affects the heat transfer,was proposed through theoretical analysis.With calculating of this dimensionless variable,the heat transfer coupled with mass transfer can be converted into a conventional heat transfer,making the heat transfer calculation simpler and more easily to understand.On the basis of theoretical analysis,the effects of mass transfer on heat transfer were numerically studied.The results show that,in the case that the temperature gradient and mass transfer are in the same direction,ψi is greater than unity,and the mass transfer acts to enhance the heat transfer;in the case that the temperature gradient and mass transfer are in opposite directions,ψi is less than unity,and the mass transfer works to hinder the heat transfer.When the mass flux is small,the effect of the mass transfer is weak.When the mass flux is large,the heat flux carried by the mass flux has a considerable impact on the heat flux,and ψi,deviates from unity significantly.HU Teng MIN JingChun SONG YaoZu 2010Chinese Science Bulletin2010,55,12:8
19Impacts of ionospheric scintillation on geosynchronous SAR focusing: preliminary experiments and analysis显示文摘亲爱的编辑,同步合成孔径雷达(GEO SAR)具有显着的潜在危害和灾害监测应用时,由于其短重访时间约24小时,约1 / 3的地球表面[1,2],覆盖面广。然而,在L波段操作使它更容易受到电离层闪烁[2,3]。徐等。从理论上分析了电离层对星载SAR球形闪烁[ 3 ]的影响,这一现象也被观察到在低地球轨道(LEO SAR)SARS如ALOS PALSAR [ 4 ]。地理合成孔径雷达是更严重的影响电离层闪烁,因为信号传播路径覆盖整个电离层(超过1000公里以上的地面)[ 3 ]。相比之下,狮子座合成孔径雷达的轨道是几百公里。然而,研究人员很少分析电离层闪烁对L波段GEO SAR,或进行实验验证。LI YuanHao HU Cheng DONG XiChao TIAN WeiMing LONG Teng 2015Science China(Information Sciences)2015,58,10:8
20Association of Overlapped and Un-overlapped Comorbidities with COVID-19 Severity and Treatment Outcomes: A Retrospective Cohort Study from Nine Provinces in China显示文摘Objective Several COVID-19 patients have overlapping comorbidities. The independent role of each component contributing to the risk of COVID-19 is unknown, and how some non-cardiometabolic comorbidities affect the risk of COVID-19 remains unclear.Methods A retrospective follow-up design was adopted. A total of 1,160 laboratory-confirmed patients were enrolled from nine provinces in China. Data on comorbidities were obtained from the patients’ medical records. Multivariable logistic regression models were used to estimate the odds ratio(OR) and 95% confidence interval(95% CI) of the associations between comorbidities(cardiometabolic or non-cardiometabolic diseases), clinical severity, and treatment outcomes of COVID-19.Results Overall, 158(13.6%) patients were diagnosed with severe illness and 32(2.7%) had unfavorable outcomes. Hypertension(2.87, 1.30–6.32), type 2 diabetes(T2 DM)(3.57, 2.32–5.49),cardiovascular disease(CVD)(3.78, 1.81–7.89), fatty liver disease(7.53, 1.96–28.96), hyperlipidemia(2.15, 1.26–3.67), other lung diseases(6.00, 3.01–11.96), and electrolyte imbalance(10.40, 3.00–26.10)were independently linked to increased odds of being severely ill. T2 DM(6.07, 2.89–12.75), CVD(8.47,6.03–11.89), and electrolyte imbalance(19.44, 11.47–32.96) were also strong predictors of unfavorable outcomes. Women with comorbidities were more likely to have severe disease on admission(5.46,3.25–9.19), while men with comorbidities were more likely to have unfavorable treatment outcomes(6.58, 1.46–29.64) within two weeks.Conclusion Besides hypertension, diabetes, and CVD, fatty liver disease, hyperlipidemia, other lung diseases, and electrolyte imbalance were independent risk factors for COVID-19 severity and poor treatment outcome. Women with comorbidities were more likely to have severe disease, while men with comorbidities were more likely to have unfavorable treatment outcomes.MA Yan ZHU Dong Shan CHEN Ren Bo SHI Nan Nan LIU Si Hong FAN Yi Pin WU Gui Hui YANG Pu Ye BAI Jiang Feng CHEN Hong CHEN Li Ying FENG Qiao GUO Tuan Mao HOU Yong HU Gui Fen HU Xiao Mei HU Yun Hong HUANG Jin HUANG Qiu Hua HUANG Shao Zhen JI Liang JIN Hai Hao LEI Xiao LI Chun Yan LI Min Qing LI Qun Tang LI Xian Yong LIU Hong De LIU Jin Ping LIU Zhang MA Yu Ting MAO Ya MO Liu Fen NA Hui WANG Jing Wei SONG Fang Li SUN Sheng WANG Dong Ting WANG Ming Xuan WANG Xiao Yan WANG Yin Zhen WANG Yu Dong WU Wei WU Lan Ping XIAO Yan Hua XIE Hai Jun XU Hong Ming XU Shou Fang XUE Rui Xia YANG Chun YANG Kai Jun YUAN Sheng Li ZHANG Gong Qi ZHANG Jin Bo ZHANG Lin Song ZHAO Shu Sen ZHAO Wan Ying ZHENG Kai ZHOU Ying Chun ZHU Jun Teng ZHU Tian Qing ZHANG Hua Min WANG Yan Ping WANG Yong Yan 2020Biomedical and Environmental Sciences2020,33,12:8
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