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Wind and Solar Power in the United States:Status and Prospects

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维普期刊数据库

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CSEE Journal of Power and Energy Systems 2017年第1期3卷 1-6页

作者： Michael b McElroy Xinyu Chen Join A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138USA

The United States has committed to reduce its greenhouse gas emissions by 26%–28%by 2025 and by 83%by 2050 relative to *** these objectives will require major investments in renewable energy options,particularly wind and *** investments are promoted at the federal level by a variety of tax credits,and at the state level by requirements for utilities to include specific fractions of renewable energy in their portfolios(Renewable Portfolio Standards)and by opportunities for rooftop PV systems to transfer excess power to utilities through net metering,allowing meters to operate in *** paper discusses the current status of these incentives.

关键词： Incentives net metering renewable energy renewable energy portfolio

Continued surprises in the cytochrome c biogenesis story

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维普期刊数据库

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Protein & Cell 2012年第6期3卷 405-409页

作者： Elizabeth b.Sawyer Paul D.barker National Laboratory of biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China University Chemical Laboratory University of CambridgeCambridgeCB21EWUnited Kingdom

Cytochromes c covalently bind their heme prosthetic groups through thioether bonds between the vinyl groups of the heme and the thiols of a CXXCH motif within the *** Gramnegative bacteria,this process is catalyzed by the Ccm(cytochrome c maturation)proteins,also called System *** Ccm proteins are found in the bacterial inner membrane,but some(CcmE,CcmG,CcmH,and CcmI)also have soluble functional domains on the periplasmic face of the *** of the mechanisms involved in the transport and relay of heme and the apo-cytochrome from the bacterial cytosol into the periplasm,and their subsequent reaction,has proved challenging due to the fact that most of the proteins involved are membrane-associated,but recent progress in understanding some key components has thrown up some *** this Review,we discuss advances in our understanding of this process arising from a substrate’s point of view and from recent structural information about individual components.

关键词： cytochrome c heme Ccm post-transla-tional modification cytochrome b562 heme binding

Two-Dimensional Graphs Moving by Mean Curvature Flow

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维普期刊数据库

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Acta Mathematica Sinica,English Series 2002年第2期18卷 209-224页

作者： CHEN Jing Yi Department of Mathematics.The University of british Columbia.Vancouver.b.C..Canada V6T 1Z2 E-mail:jychen@math.ubc.caLI Jia Yu Institute of Mathematics.Academy of Mathematics and System Sciences.Chinese Academy of Sciences.beijing 100080.P.R.China Department of Mathematics.Fudan University.Shanghai 200433.P.R.China E-mail:lijia@math03.math.ac.cnTIAN Gang Department of Mathematics,MIT.cambridge.MA 02139.U.S.A.E-mail:tian@math,mit.edu Department of Mathematics The University of British Columbia Vancouver B. C. Canada V6T 1Z2 Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing P. R. China Department of Mathematics Fudan University Shanghai P. R. China Department of Mathematics MIT Cambridge U.S.A.

A surface E is a graph in R^4 if there is a unit constant 2-form ω on R^4 such that ≥v_0>0 where{e_1.e_2}is an orthonormal frame on Σ.We prove *** v_0≥on the initial snrface,then the mean curvature flow has a global solution and the scaled surfaces converge to a self-similar solution.A surface Σ is a graph in M_1×M_2 where M_1 and M_2 are Riemann surfaces. if≥v_0>0 where w_1 is a Khler form on M_*** prove *** M is a Khler-Einstein surface with scalar curvature R.v_0≥ on the initial surface,then the mean curvature flow has a global solution and it sub-converges to a minimal surface,*** addition.R≥0 it converges to a totally geodesic surface which is holomorphic.

关键词： Mean curvature flow 2-dimensional graphs in R^4,Self-similar solution

术后血管闭合装置与Femo-Stop的临床应用研究(英文)

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中华急诊医学杂志 2004年第5期13卷 293-296页

作者：李志忠 Lo sidney Craig P Juergens 北京安贞医院心肺血管病抢救中心澳大利亚Liverpool医院心内科澳大利亚Liverpool医院导管室

目的　比较PTCA术后应用血管闭合装置与常规压迫对血管并发症的影响和患者的满意度。方法　 4 83例患者经股动脉途径行PTCA术 ,术后穿刺部位处理接受常规压迫装置 (Femo -Stop) 2 98例 ,血管闭合装置 185例(Angio SealTM16 2例 ,Perclos... 详细信息

目的　比较PTCA术后应用血管闭合装置与常规压迫对血管并发症的影响和患者的满意度。方法　 4 83例患者经股动脉途径行PTCA术 ,术后穿刺部位处理接受常规压迫装置 (Femo -Stop) 2 98例 ,血管闭合装置 185例(Angio SealTM16 2例 ,Perclose 2 3例 )。观察并记录止血时间 ,开始早期行走时间 ,血管并发症情况 ,并由专门护士进行随访 ,调查出院 4 8h后患者的满意度。结果　两组应用GPⅡb -Ⅲa受体拮抗剂的比率分别是 5 6 8%vs 18 8% (P 0 0 5 )。两组患者出院后 4 8h随访满意度分别是 92 4 % ,6 5 4 % (P 0 0 5 )差异无显著性。结论　应用血管闭合装置可以使患者更早开始行走 ,缩短住院时间。尤其是Angio -SealTM

关键词： PTCA术血管闭合装置 Femo-Stop 血管并发症经皮腔内冠脉血管成形术

pH-dependent leaching behaviour and other performance properties of cement-treated mixed contaminated soil

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Journal of Environmental Sciences 2012年第9期24卷 1630-1638页

作者： Reginald b. Kogbara Abir Al-Tabbaa Yaolin Yi Julia A. Stegemann Geotechnical and Environmental Group Cambridge University Engineering Department Trumpington Street Cambridge CB2 1PZ UK. Center of ExceUence in Environmental Studies King Abdulaziz University Jeddah 21589 Saudi Arabia Institute of Geotechnical Engineering Southeast University 2# Sipailou Nanjing 210096 China Department of Civil Environmental and Geomatic Engineering Chadwick Building University College London WCIE 6BT UK

Portland cement has been widely used for stabilisation/solidification （S/S） treatment of contaminated soils. However, there is a dearth of literature on pH-dependent leaching of contaminants from cement-treated soils. This study investigates the leachability of Cu, Pb, Ni, Zn and total petroleum hydrocarbons （TPH） from a mixed contaminated soil. A sandy soil was spiked with 3000 mg/kg each of Cd, Cu, Pb, Ni and Zn, and 10,000 mg/kg of diesel, and treated with ordinary Portland cement （CEM I）. Four different binder dosages, 5%, 10%, 15% and 20% （m/m） and different water contents ranging from 13%-19% dry weight were used in order to find a safe operating envelope for the treatment process. The pH-dependent leaching behaviour of the treated soil was monitored over an 84-day period using a 3-point acid neutralisation capacity （ANC） test. The monolithic leaching test was also conducted. Geotechnical properties such as unconfined compressive strength （UCS）, hydraulic conductivity and porosity were assessed over time. The treated soils recorded lower leachate concentrations of Ni and Zn compared to the untreated soil at the same pH depending on binder dosage. The binder had problems with Pb stabilisation and TPH leachability was independent of pH and binder dosage. The hydraulic conductivity of the mixes was generally of the order, 10-8 m/sec, while the porosity ranged from 26%--44%. The results of selected performance properties are compared with regulatory limits and the range of operating variables that lead to acceptable performance described.

关键词： diesel heavy metals hydraulic conductivity porosity Portland cement stabilisation/solidification

The Fibrillar Matrix:Novel Avenues for breast Cancer Detection and Treatment

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Engineering 2021年第10期7卷 1375-1380页

作者： Rasha Rezk Raquel Marín-García Annica K.b.Gad Weston Park Cancer Centre Department of Oncology and MetabolismThe Medical SchoolThe University of SheffieldSheffield S102RXUnited Kingdom Department of Engineering University of CambridgeCambridge CB21PZUnited Kingdom Madeira Chemistry Research Center University of MadeiraFunchal 9020105Portugal

breast cancer is marked by large increases in the protein fibers around tumor *** fibers increase the mechanical stiffness of the tissue,which has long been used for tumor diagnosis by manual *** research in bioengineering has led to the development of novel biomaterials that model the mechanical and architectural properties of the tumor microenvironment and can be used to understand how these cues regulate the growth and spread of breast ***,we provide an overview of how the mechanical properties of breast tumor tissues differ from those of normal breast tissue and noncancerous *** also describe how biomaterial models make it possible to understand how the stiffness and viscosity of the extracellular environment regulate cell migration and breast cancer *** highlight the need for biomaterial models that allow independent analysis of the individual and different mechanical properties of the tumor microenvironment and that use cells derived from different regions within *** models will guide the development of novel mechano-based therapies against breast cancer metastasis.

关键词： breast cancer Tissue stiffness Cancer metastasis Cell migration bioengineered scaffold Viscosity

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午夜魂 1版

CENOZOIC FAULTING ALONG THE SOUTHEASTERN EDGE OF THE TIbETAN PLATEAU IN THE YANYUAN AREA AND ITS TECTONIC IMPLICATIONS

1991年

作者：（美）西德尼·谢尔顿（sidney Sheldon）吴亦东等译

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汇雅图书（南通市图书馆）

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地学前缘 2000年第S1期7卷 269-269页

作者： Wang Erchie 1, burchfiel b. Clark 2[WT5,5”bX](1 Institute of Geology and Geophysics, Chinese Academy of Science,beijing 100029,China 2 Department of Earth, Atmospheric and Planetary Sciences, MIT,cambridge, MA 02139,UK)

The southeastern edge of the Tibetan plateau is marked by several thrust sheets trending roughly in E\|W direction. The Yanyuan thrust sheet is bounded by three arcuate thrust belts, marked by high mountain ranges with the Jinhe belt on the north, the Qianhe belt on the south and the Ninglang belt on the west. Within the Yanyuan thrust belt are sedimentary cover rocks of the Yangtze platform, with ages ranging from Sinian to Triassic. In the north, the thrust sheet is overlain by the Muli thrust sheet along the Jinhe belt, while in the south, it is underlain by the Kangdian paleoland along the Qianhe belt. The youngest rocks on the foot wall are late Eocene to Oligocene in age, indicating that the thrusting occurred in the late Tertiary. The top of the Yanyuan thrust belt is truncated by a flat erosion surface similar to that on the plateau to the north. Along a north\|dipping normal fault bordering the Yanyuan basin on the south, the erosion surface is tilted to the south against Triassic rocks. The basin is filled with coal\|bearing clastic sediments of Pliocene and early Pleistocene age, which gives the timing of the normal faulting. based on the faulting pattern, we propose that the southeastern edge of the Tibetan plateau underwent a large amount of N\|S shortening and uplift along the Yanyuan thrust sheet in the late Tertiary, while the subsequent normal faulting that had occurred along the Yanyuan basin during the Pliocene and Pliocene can be interpreted to have accommodated gravitational collapse of the crust.

关键词： southeastern edge of the Tibetan plateau Yanyuan thrust shee t crustal shortening and uplift normal faulting gravitational collapse

Current progress and questions in germline genetics of prostate cancer

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Asian Journal of Urology 2019年第1期6卷 3-9页

作者： William b.Isaacs Jianfeng Xu brady Urological Institute Johns Hopkins UniversitySchool of MedicineSidney Kimmel Comprehensive Cancer CenterBaltimoreMDUSA North Shore University Health System Research InstituteEvanstonILUSA

Dramatic progress has been made in the area of germline genetics of prostate cancer(PCa)in the past *** common and rare genetic variants with effects on risk ranging from barely detectable to outright practice-changing have been *** men with high risk PCa,the application of genetic testing for inherited pathogenic mutations is becoming standard of care.A major question exists about which additional populations of men to test,as men at all risk levels can potentially benefit by knowing their unique genetic profile of germline susceptibility *** article will provide a brief overview of some current issues in understanding inherited susceptibility for PCa.

关键词： Genetic susceptibility bRCA2 Single-nucleotide polymorphisms Mutations Germline genetics Prostate cancer