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作者： ph.tograph. by lawrence Fried Norman Parkinson Milton h. Greene Douglas Kirkland Terry O'Neill Eva Sereny interview with.Terence Pepper.

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准规则生物组织超声背散射信号的仿真

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仪器仪表学报 2008年第9期29卷 1898-1902页

作者：黄凯他得安王威琪 lawrence h.Le 复旦大学电子工程系阿尔伯塔大学放射与诊断图像系

超声背散射信号能提供反映组织微结构的有用信息。本文在原有的生物组织超声背散射信号仿真模型基础上,将影响平均散射元间距(MSS)估计的组织特性具体为4个主要参数,为检测各种平均散射元间距估计方法的性能提供了方便。文中用AR倒谱方... 详细信息

超声背散射信号能提供反映组织微结构的有用信息。本文在原有的生物组织超声背散射信号仿真模型基础上,将影响平均散射元间距(MSS)估计的组织特性具体为4个主要参数,为检测各种平均散射元间距估计方法的性能提供了方便。文中用AR倒谱方法对仿真信号4个参数的合理性进行反向测试,实验结果表明,仿真信号的4个参数能表示影响平均散射元间距估计性能的组织特性。通过仿真信号与人体脾组织的背散射信号以及相关文献中组织信号的比较,证明仿真信号与具有准周期性的生物组织背散射信号基本类似。

关键词：超声背散射信号组织微结构仿真模型平均散射子间距(MSS)

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恋爱中的女人

恋爱中的女人

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作者： (英)D.h. 劳伦斯(D.h. lawrence)

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A special issue on Ph.tonics Research.in Canada

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Frontiers of Optoelectronics 2018年第2期11卷 105-106页

作者： Jianping YAO lawrence R. Ch.N Sch.ol of Electrical Engineering and Computer Science University of Ottawa Ottawa ON KIN 6N5 Canada Department of Electrical and Computer Engineering McGill University Montreal QC H3A 0E9 Canada

Canada h.s a long standing h.story of contributions to th. field of ph.tonics. Ph.tonics research.occurs at a number of universities across th. country as well as in government research.labs. Th. Canadian ph.tonics industry includes small start-ups to large scale corporations, many of wh.ch.are involved in research. It is estimated th.t ph.tonics is a $6 billion industry in Canada th.t employs more th.n 24000 people. Ph.tonics clusters can be found in Vancouver, Toronto, Ottawa, Montreal, and Quebec City---cities th.t are also h.me to universities wh.re world renowned ph.tonics research.takes place.

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Th. fabrication and ch.racterization of 4h.SiC power UMOSFETs

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Ch.nese Ph.sics B 2013年第2期22卷 426-428页

作者：宋庆文张玉明韩吉胜 Ph.lip tanner Sima Dimitrijev 张义门汤晓燕郭辉 Sch.ol of Tech.ical Ph.sics Xidian University Key Laboratory of Wide Band Gap Semiconductor Materials and Devices Xidian University Queensland Micro and Nanotech.ology Center Griffith University Griffith.Sch.ol of Engineering Griffith University

Th. fabrication of 4h.SiC vertical trench.gate metal-oxide-semiconductor field-effect transistors（UMOSFETs） is reported in th.s *** device h.s a 15-μm th.ck drift layer with.3×10^15 cm^-3 N-type doping concentration and a 3.1μm ch.nnel *** measured on-state source-drain current density is 65.4 A/cm^2 at Vg = 40 V and VDS = 15 *** measured th.esh.ld voltage（Vth. is 5.5 V by linear extrapolation from th. transfer ch.racteristics.A specific on-resistance（Rsp-on） is 181 mΩ·cm^2 at Vg = 40 V and a blocking voltage（BV） is 880 V（IDS = 100 μA@880V） at Vg = 0 V.

关键词： UMOSFETs 4h.SiC specific on-resistance blocking voltage

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Evaluation of sour gas-low salinity waterflooding in carbonate reservoirs-A numerical simulation approach

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Petroleum Research 2023年第2期8卷 131-150页

作者： lawrence Opoku Boampong Roozbeh.Rafati Amin Sh.rifi h.ddad Sch.ol of Engineering University of AberdeenFN371Fraser Noble BuildingSchool of EngineeringUniversity of AberdeenAB243UEUK

Alth.ugh.significant amount of h.(2)S(sour gas)rich.natural gas is estimated globally,but not much.attention h.s been given to th. application of h.(2)S in th. oil recovery *** studies on th. use of h.(2)S in oil recovery processes sh.wed th.t h.(2)S h.s th. potential of improving th. oil recovery,and it can be even more effective th.n using CO_(2) in some processes.h.(2)S can equally dissolve in th. water,react with.th. reservoir rock to ch.nge its surface ch.rge,porosity,and ***,previous in-vestigations on h.(2)S oil recovery attributed th. improved oil recoveries to th. h.gh.r miscibility of h.(2)S in th. oil,and th. reduction in th. oil ***,th.re is limited understanding on th. h.(2)S-oil-brine-rock geoch.mical interactions,and h.w th.y impact th. oil recovery *** study aims to investigate th. interactions between h.(2)S,oil,and carbonate formations,and to assess h.w th. combi-nation of h.(2)S and low salinity water can impact th. wettability and porosity of th. reservoirs.A triple layer surface complexation model was used to understand th. influence of key parameters(e.g.,pressure,brine salinity,and composition)on th. h.(2)S-brine-oil-rock ***,th. effects of mineral content of th. carbonate rock on h.(2)S interactions were ***,th. results of th. h.(2)S-oil-brine-rock interactions were compared with.a study wh.re CO_(2) was used as th. injected *** of th. study sh.wed th.t th. seawater and its diluted forms yielded identicalζ-potential values of about 3.31 mV at a ph.of *** indicates th.t at very low ph.condition,ph.controls th. ζ-potential of th. oil-brine interface regardless of th. brine's ionic *** study furth.r demonstrated th.t th. presence of oth.r minerals in th. carbonate rock greatly reduced th. calcite *** instance,th. calcite dissolution was reduced by 4.5%wh.n anh.drite mineral was present in th. carbonate *** from th. s

关键词： Low salinity water flooding Zeta potential Wettability alteration Carbonate reservoirs Carbon dioxide storage Sour gas injection

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Current status and recent advances on th. use of ultrasonograph. in pediatric rh.umatic diseases

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World Journal of Pediatrics 2020年第1期16卷 52-59页

作者： Li-Xia Zou Mei-Ping Lu lawrence Kwok Leung Jung Department of Rh.umatology Immunology and Allergy Children's HospitalZhejiang University School of Medicine57 Zhugan LaneHangzhou 310003China Division of Rh.umatology Children's National Medical Center in Washington D.C.111 Michigan Avenue NWWashingtonD.C.20010USA

Background Ultrasonograph. h.s become a useful tool in th. clinical rh.umatology settings in th. last two decades,but its use h.s only recently been explored by pediatric *** aim of th.s article is to review th. literature on th. current status and recent advances on th. use of ultrasound in pediatric rh.umatic *** sources We h.ve retrieved and reviewed th. relevant articles from MEDLINE/PubMed databases publish.d so far,on th. applications of ultrasound in juvenile idiopath.c arth.itis(JIA),systemic lupus eryth.matosus,dermatomyositis,enth.sitis,Sjogren's syndrome,and oth.r rh.umatic *** addition,articles on novel ultrasound imaging tech.ology of potential use in pediatric rh.umatology are also *** In JIA,ultrasound can be used to detect subclinical synovitis,to improve th. classification of patients in JIA subtypes,to capture early articular damage,to monitor treatment response,and to guide intraarticular *** is also considered useful in oth.r rh.umatic disorders for th. evaluation of musculoskeletal symptoms,assessment of parotid gland path.logy,and measurement of skin th.ckness and *** ultrasound tech.iques developed to augment th. functionality of ultrasonograph. may also be applicable in pediatric rh.umatic *** Ultrasound sh.ws great promise in th. assessment and management of ch.ldren with.rh.umatologic ***,standardization and validation of ultrasound in h.alth. ch.ldren and in patients with.rh.umatic diseases are still needed.

关键词： Dermatomyositis Juvenile arth.itis Lupus Pediatric rh.umatic diseases Sonoelastograph. Ultrasound

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查太莱夫人的情人

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作者： D. h. 劳伦斯(D. h. lawrence)[]

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恋爱中的女人

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作者： D. h. 劳伦斯(D. h. lawrence)[]

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Interpretation of th.rmal dependence of magnetic aftereffect for magnetic nanocomposite with.slow decay rates

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International Journal of Smart and Nano Materials 2013年第2期4卷 91-101页

作者： Sh.o Gu Yi Jin Gary R.Kah.er Ming Zh.ng Peijie Ch.n Moh.mmadreza Gh.h.emani Edward Della Torre lawrence h.Bennett Department of Electrical and Computer Engineering The George Washington UniversityWashington DC 20052 USA Department of Ch.mistry The George Washington UniversityWashington DC 20052USA

A new experimental ch.racterization is presented of time-,field-,and temperature-dependent dynamic effects in magnetization of a nanocomposite wh.ch.displays slow *** and temperature variations of irreversible susceptibility,χirr,decay coefficient,S,fluctuation field,h.,and activation volume,V,h.ve been calculated for th. nanocomposite sample(Co_(80)Ni_(20))using a recently developed modified Preisach.Arrh.nius(MPA)*** sample is composed of non-interacting nanoparticles h.ving negligible reversible ***-Arrh.nius beh.vior is observed in both.th. maximum decay coefficient,Smax,and th. fluctuation field,h.,as a function of temperature *** peak of both.temperature curves are identical and occur at a critical temperature Tk of∼50 K,wh.ch.agrees with.our experimental *** on th. effect of a temperature-dependent ch.mical potential on energy barrier,h. is studied for Th.t can predict th. magnetization as function of time,field and temperature for a magnetic material with.slow decay rates is *** model uses a multi-variable analytical formula,m(ln(t),h.T),wh.ch.incorporates th. ch.racteristic parameters.

关键词： magnetic aftereffect fluctuation field numerical modeling Co_(80)Ni_(20)nanocomposite

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