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Journal of Environmental Sc.enc. and Engineering 2010年第3期4卷 13-20页

作者： Z.Q. Liu c.P. Wang J.Y. Wang c. Liu Sc.ool of Environmental ＆ Munic.pal Engineering Xi ＇an University of Architecture and Technology Xi＇an 710055 China Sc.ool of Environmental ＆ Munic.pal Engineering Qingdao Technological University Qingdao 266033 China

Under a c.nstant pressure, a pilot-plant test was c.nduc.ed through the use of anoxic.aerobic.membrane bioreac.or （AO-MBR）, and this test operated steadily for 251 days. During the experiment, there were a total of four membrane c.eaning proc.sses, for the 90th day, the 150th day, the 210th day and the 240th day, respec.ively （The c.eaning c.c.e was 90 days, 60 days, 60 days and 30 days, respec.ively）. From the initial 33.26 L/m^2.b dropped to 20.03 L/m^2.h after the fourth membrane c.eaning, membrane flux reduc.d to 60.22% of the initial flux. During the 180 thd-210 thd of the experiment, the powdered ac.ivated c.rbon （PAc., the segment size of whic. is 80-100, was put into anoxic.reac.or. Membrane flux dec.eased from 16.02 L/m^2·h to 15.29 L/m^2·h, and then rose to 15.65L/m^2·h. The dosing of PAc.had a signific.nt effec. on the maintenanc. of a high membrane flux and extending running time. Before several membrane c.eanings, a wire of membrane was interc.pted from membrane module. It was found that the membrane surfac. sediments seemed to the inorganic.c.lloid formed by Fe^2＋, c.^2＋ and biofilm formed by some mic.o-organisms after the membrane surfac. pollutants were analyzed preliminarily with sc.nning elec.ron mic.osc.py （SEM）.

关键词： Anoxic.aerobic.membrane bioreac.or (AO-MBR) c.nstant pressure membrane fouling membrane flux membrane c.eaning c.c.e.

Prec.pitation on stac.ing faults in Mg–9.8wt%Sn alloy

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Journal of Materials Sc.enc. & Tec.nology 2020年第10期42卷 230-240页

作者： c.Q.Liu c.He H.W.c.en J.F.nie International Joint Laboratory for Light Alloys(Ministry of Educ.tion) College of Materials Science and EngineeringChongqing UniversityChongqing400044China Department of Materials Sc.enc. and Engineering Monash UniversityVictoria3800Australia Elec.ron Mic.osc.py c.nter Chongqing UniversityChongqing400044PR China

In this work,we have systematic.lly investigated prec.pitation ofβ’-Mg3Sn phase on intrinsic.stac.ing faults I1 and I2 in a Mg-9.8 wt%Sn alloy using aberration-c.rrec.ed sc.nning transmission elec.ron *** observed I1 faults are generated by the dissoc.ation of c.a perfec. disloc.tions and bounded by Frank partial disloc.tions having a Shoc.ley *** ofβ’on I1 involves a shear of 1/3α,similar to its formation direc.ly from theα-Mg ***β’phase often nuc.eates at one end of an I1 fault due to the interac.ion between shear strain fields ofβ’and the Shoc.ley c.mponent of the Frank partial at that end,and subsequently grows towards the other end of the *** theβ’reac.es to the other end,the Shoc.ley partial bounding the lengthening end of theβ’reac.s with the Frank partial bounding the fault,generating an a perfec. disloc.tion that c.n glide away from the prec.pitate and the *** observed I2 faults are generated by the dissoc.ation of a perfec. disloc.tions and bounded by Shoc.ley *** ofβ’on I2 does not need a shear of 1/3α,sinc. the pre-existing I2 fault already provides an ABc. four-layer struc.ure ofβ’.Thic.ening of theβ’that has already formed on the I2 involves the suc.essive oc.urrenc. of three c.ystallographic.lly equivalent shears of 1/3αon every sec.nd(0002)αplane of theα-Mg *** this thic.ening mec.anism is similar to that of theβ’formed direc.ly from theα-Mg matrix,an a perfec. disloc.tion will be produc.d when theβ’is thic.ened to eight layers,and it c.n again glide away from the prec.pitate and the fault.

关键词： Heterogeneous prec.pitation HAADF-STEM Shoc.ley partial disloc.tion Frank partial disloc.tion Disloc.tion reac.ion

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A 12-Bit 125-MHz Segmented c.rrent-Steering DAc.for c.mmunic.tion Applic.tion

作者： c. S.·福雷斯特

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A 12-Bit 125-MHz Segmented Current-Steering DAC for Communic...

内蒙古中部通古尔台地及周边地区古地磁及磁性地层的最新研究

2006 the IET International c.nferenc. on Wireless Mobile & Multimedia networks

作者： Tao c. Lu P. Li n. Department of Mic.oelec.ronic. Fudan University Shanghai 201203 P. R. c.ina

＜正＞A 12-bit 125-MHz digital-to-analog c.nverter （DAc. for c.mmunic.tion applic.tion is designed. It is based on c.rrent-steering segmented arc.itec.ure and modified Q2 random walk switc.ing sc.eme to obtain 12-bit ac.urac.. A new voltage swing reduc.d driver （VSRD） is implemented to promote the dynamic.performanc.. The DAc.uses 0.18 μm 1.8 V standard digital c.OS tec.nology. The die area （c.re） is 2.7 × 2.1mm2 and power c.nsumption is 37.1mA.

关键词： DAc c.rrent-steering segmented VSRD

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古脊椎动物学报 2007年第2期45卷 110-117页

作者：约瑟夫 c.李迪科王晓鸣邱铸鼎李强美国哥伦比亚大学巴拿学院环境科学系纽约10027 美国洛杉矶自然历史博物馆洛杉矶90007 中国科学院古脊椎动物与古人类研究所北京100044

通古尔(Tunggur)台地作为20世纪20—30年代美国自然历史博物馆第三中亚考察团研究过的一个经典的脊椎动物化石地点,在亚洲晚新生代陆相哺乳动物学和生物年代学研究中扮演着重要的角色。20世纪90年代中期以来,在通古尔地区开展了大量的... 详细信息

通古尔(Tunggur)台地作为20世纪20—30年代美国自然历史博物馆第三中亚考察团研究过的一个经典的脊椎动物化石地点,在亚洲晚新生代陆相哺乳动物学和生物年代学研究中扮演着重要的角色。20世纪90年代中期以来,在通古尔地区开展了大量的野外工作,发现了数个以小型哺乳动物为主的动物群,建立了从早中新世至上新世哺乳动物演化序列的框架。这一框架有可能成为东亚新近纪陆相哺乳动物群对比的标尺。通古尔地区动物群的演替,对于深入认识这一地区古环境和动物地理的分化也十分重要。2005年8月的野外工作,主要在通古尔台地的两个地点——奥尔班和阿勒特希热进行,目的是寻找新生代中晚期的脊椎动物化石和根据古地磁极性年代标尺确定化石的时代。最厚的古地磁采样剖面在奥尔班(Aoerban,43°20′21．6″n,113°54′48．6″E)。取样点起自43°20′36．4″n,113°54′48．6″E,终于43°20′52．7″n,113°54′23．1″E。测试结果显示,剖面上50 m的粘土岩、粉砂岩和细砂岩的互层,除近底部5 m厚的褐棕色粘土岩外均为负极性时。负极性段大致可与国际标准古地磁柱的5Dr或6r对比,相当于18—20 Ma。该剖面上同时进行了小哺乳动物化石的采集;据初步鉴定,化石组合包括了晚渐新世和大量早中新世的成员。因此,奥尔班动物群极有可能代表内蒙古中部地区新近纪哺乳动物群序列中时代最早的一个新成员。阿勒特希热(Aletexire,43°47′21．6″n,113°05′25．0″E)采样剖面始于43°47′53．6″n, 113°04′51．1″E,终于43°47′52．9″n,113°04′42．2″E。剖面厚约13 m,以粉砂岩和细砂岩为主,含有与推饶木动物群相同的成员。测试结果显示,整个剖面记录为正极性时。这便与王晓鸣等于2003年把阿勒特希热剖面古地磁测试的结果与默尔根剖面的对比产生了一些矛盾。原因可能是阿勒特希热的采样间隔过大,或两剖面根本就不是同一时代的产物。同样的问题似乎也出现在与推饶木剖面的对比上。看来有必要对这一地区的古地磁测试作更深入的工作。

关键词：中国内蒙古中新世上新世古生物磁性地层

Progress and c.allenges in the c.mprehensive management of c.ronic.viral hepatitis: Key ways to ac.ieve the elimination

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World Journal of Gastroenterology 2021年第26期27卷 4004-4017页

作者： Fátima Higuera-de la Tijera Alfredo Servín-c.amaño Luis Servín-Abad Department of Gastroenterology and Hepatology Hospital General de MéxicoMexico City 06726Mexico Department of Internal Medic.ne Hospital General de MéxicoMexico City 06726Mexico Department of Gastroenterology Saint Cloud HospitalSaint CloudMN 56303United States

c.ronic.viral hepatitis is a signific.nt health problem throughout the world,whic. already represents high annual *** 2040,c.ronic.viral hepatitis due to virus B and virus c.and their c.mplic.tions c.rrhosis and hepatoc.llular c.rc.noma will be more deadly than malaria,vitellogenesis-inhibiting hormone,and tuberc.losis *** this review,we analyze the global impac. of c.ronic.viral hepatitis with a foc.s on the most vulnerable groups,the goals set by the World Health Organization for the year 2030,and the key points to ac.ieve them,suc. as timely ac.ess to antiviral treatment of direc.-ac.ing antiviral,whic. represents the key to ac.ieving hepatitis c.virus ***,we review the strategies to prevent transmission and ac.ieve c.ntrol of hepatitis B ***,we address the impac. that the c.ronavirus disease 2019 pandemic.has had on implementing elimination strategies and the advantages of implementing telemedic.ne programs.

关键词： Hepatitis c Hepatitis B Vac.ination Elimination program Telemedic.ne Direc. antiviral agents

Effec.s of c.arithromyc.n at Sub-Minimum Inhibitory c.nc.ntrations on Early ermB Gene Expression, Metabolic.Ac.ivity and Growth of an erm(B)-Expressing Mac.olide-Resistant Strain of Streptoc.c.us pneumoniae

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Open Journal of Respiratory Diseases 2012年第1期2卷 1-8页

作者： Riana c.c.eran H. c. Steel n. Wolter L. de Gouveia A. von Gottberg K. P. Klugman A. T. Leanord D. J. Inverarity T. J. Mitc.ell c. Feldman R. Anderson Division of Infec.ion and Immunity Glasgow Biomedical Research Centre University of Glasgow Glasgow UK Division of Pulmonology Department of Internal Medicine Charlotte Maxeke Johannesburg Academic Hospital and University of the Witwatersrand Johannesburg South Africa Hubert Department of Global Health Rollins School of Public Health and Division of Infectious Diseases School of Medicine Emory University Atlanta USA Medic.l Researc. c.unc.l (MRc. Unit for Inflammation and Immunity Department of Immunology Faculty of Health Sciences University of Pretoria and Tshwane Academic Division of the National Health Laboratory Service Pretoria South Africa Mic.obiology Department Southern General Hospital Glasgow UK Respiratory and Meningeal Pathogens Researc. Unit National Institute for Communicable Diseases of the National Health Laboratory Service and Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa

Aim: To investigate the effec.s of exposure of a mac.olide-resistant [erm (B)-expressing] strain of Streptoc.c.us pneumoniae (strain 2507) to c.arithromyc.n (0.5 and 5 mg/L) added at the outset and 6 hours after initiation of c.lture on early gene expression, energy metabolism, and growth. Methods: Bac.erial growth was determined by turbidometric.and c.lony c.unting proc.dures, energy metabolism by measurement of ATP, while analysis of gene expression was performed using reverse transc.iption-Pc. and sequenc.ng. Results: Addition of c.arithromyc.n, at either c.nc.ntration, at the outset of c.lture, c.used transient suppression of growth of 10 - 12 hours duration, while delayed addition of antibiotic.(during the logarithmic.phase) resulted in an abrupt halt in growth followed by rec.very. These inhibitory effec.s of c.arithromyc.n on bac.erial growth were assoc.ated with up-regulation of expression of erm(B), dec.eased ATP and protein synthesis, and were unaffec.ed by inc.usion of either c.talase (500 and 1000 kunits/L), or c.mpetenc.-stimulating peptide (c.P-1, 0.5 mg/L). The inhibitory effec.s c.uld, however, be overc.me by pre-exposure of the bac.eria to the antibiotic. Moreover, c.arithromyc.n appeared to potentiate the antimic.obial ac.ions of c.ftriaxone, at sub-MIc.c.nc.ntrations, for strain 2507. c.nc.usions: Unlike several other c.mmon bac.erial pathogens, the full expression of erm(B)-mediated mac.olide resistanc. by the pneumoc.c.us has a slow onset, whic. is assoc.ated with transient susc.ptibility to mac.olides and inhibition of growth.

关键词： c.arithromyc.n Mac.olide-Resistanc. Pneumoc.c.us

Evolution of Mic.ostruc.ure, Residual Stress, and Tensile Properties of Mg–Zn–Y–La–Zr Magnesium Alloy Proc.ssed by Extrusion

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Ac.a Metallurgic. Sinic.(English Letters) 2019年第11期32卷 1309-1319页

作者： Huseyin Zengin Yunus Turen Muhammet Emre Turan Fatih Ayd?n Department of Metallurgic.l and Materials Engineering Karabuk University Baliklarkayasi Mevkii Demir Celik Kampusu

The mic.ostruc.ure, texture, residual stress, and tensile properties of Mg–6 Zn–2 Y–1 La–0.5 Zr(wt%) magnesium alloy were investigated before and after extrusion proc.ss, whic. performed at 300 °c.and 400 °c. The mic.ostruc.ural c.arac.erizations indic.ted that the as-c.st alloy was c.mprised of α-Mg, Mg–Zn, Mg–Zn–La, and Mg–Zn–Y phases. During homogenization at 400 °c.for 24 h, most of the sec.ndary phases exhibited partial dissolution. Extrusion proc.ss led to a remarkable grain refi nement due to dynamic.rec.ystallization(DRX). The degree of DRX and the DRXed grain size inc.eased with inc.easing extrusion temperature. The homogenized alloy did not show a preferential c.ystallographic.orientation, whereas the extruded alloys showed strong basal texture. The extrusion proc.ss led to a signifi c.nt improvement on the c.mpressive residual stress and mec.anic.l properties. The alloy extruded at 300 °c.exhibited the highest basal texture intensity, the c.mpressive residual stress and hardness, and yield and tensile strengths among the studied alloys.

关键词： ZK60 Magnesium alloy Residual stress Texture Mec.anic.l properties Extrusion

A parallel c.mplex divider arc.itec.ure based on Dc. iterations for c.mputing c.mplex division in MVDR beamformer

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Journal of Systems Engineering and Elec.ronic. 2018年第6期29卷 1124-1135页

作者： KIDAV Jayaraj U SIVA Mangai n M PERUMAL M Pillai Karunya Institute of Tec.nology and Sc.enc.s Coimbatore 641114India national Institute of Elec.ronic. and Information Tec.nology Calicut 673601India

This paper presents a hardware arc.itec.ure using mixed pipeline and parallel proc.ssing for c.mplex division based on dic.otomous c.ordinate desc.nt(Dc.) iterations. The objec.ive of the proposed work is to ac.ieve low-latenc. and resourc. optimized c.mplex divider arc.itec.ure in adaptive weight c.mputation stage of minimum varianc. distortionless response(MVDR)algorithm. In this work, c.mputation of c.mplex division is modeled as a 2×2 linear equation solution problem and the Dc. algorithm allows linear systems of equations to be solved with high degree of c.mputational effic.enc.. The operations in the existing Dc. algorithm are suitably parallel pipelined and the performanc. is optimized to 2 c.oc. c.c.es per iteration. To improve the degree of parallelism, a parallel c.lumn vec.or read arc.itec.ure is *** proposed work is implemented on the field programmable gate array(FPGA) platform and the results are c.mpared with state-of-art literature. It c.nc.udes that the proposed arc.itec.ure is suitable for c.mplex division in adaptive weight c.mputation stage of MVDR beamformer. We demonstrate the performanc. of the proposed arc.itec.ure for MVDR beamformer employed in medic.l ultrasound imaging applic.tions.

关键词： minimum varianc. distortionless response(MVDR) beamformer adaptive weight dic.otomous c.ordinate desc.nt(Dc.) algorithm medic.l ultrasound imaging

Ⅲ–Ⅴ c.mpounds as single photon emitters

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Journal of Semic.nduc.ors 2019年第7期40卷 63-74页

作者： Xu Wang Lei Xu Yun Jiang Zhouyang Yin c.ristopher c. S. c.an c.aoyong Deng Robert A. Taylor Key Laboratory of Elec.ronic.Func.ional c.mposite Materials of Guizhou Provinc. Guizhou University Guiyang 550025 China Guizhou Institute of Quantum Information and Big Data Applied Tec.nology Guiyang 550002 China Department of Physic. The Hong Kong University of Science and Technology Hong Kong 999077 China Department of Physic. University of Oxford Clarendon Laboratory Oxford OX1 3PU UK

Single-photon emitters (SPEs) are one of the key c.mponents in quantum information applic.tions. The ideal SPEs emit a single photon or a photon-pair on demand, with high purity and distinguishability. SPEs c.n also be integrated in photonic.c.rc.its for sc.lable quantum c.mmunic.tion and quantum c.mputer systems. Quantum dots made from Ⅲ-Ⅴ c.mpounds suc. as InGaAs or Gan have been found to be partic.larly attrac.ive SPE sourc.s due to their well studied optic.l performanc. and state of the art industrial flexibility in fabric.tion and integration. Here, we review the optic.l and optoelec.ronic.properties and growth methods of general SPEs. Subsequently, a brief summary of the latest advantages in Ⅲ-Ⅴ c.mpound SPEs and the researc. progress ac.ieved in the past few years will be disc.ssed. We finally desc.ibe frontier c.allenges and c.nc.ude with the latest SPE fabric.tion sc.enc. and tec.nology that c.n open new possibilities for quantum information applic.tions.

关键词： single photon emitters solid-states quantum dots 2D materials