检索结果-南通市图书馆

Optical simulation of external quantum efficiency spectra of CuIn_(1-x)Ga_xSe_2 solar cells from spectroscopic ellipsometry inputs

引用

journal of Energy Chemistry 2018年第4期27卷 1151-1169页

作者： Abdel-Rahman A.Ibdah Prakash Koirala Puruswottam Aryal Puja Pradhan Michael j.Heben nikolas j.podraza Sylvain Marsillac Robert W.Collins Department of Physics & Astronomy and Center for Photovoltaics Innovation & Commercialization University of Toledo Virginia Institute of Photovoltaics Old Dominion University

Applications of in-situ and ex-situ spectroscopic ellipsometry （SE） are presented for the development of parametric expressions that define the real and imaginary parts （ε1, ε2） of the complex dielectric function spectra of thin film solar cell components. These spectra can then be utilized to analyze the structure of complete thin film solar cells. Optical and structural/compositional models of complete solar cells developed through least squares regression analysis of the SE data acquired for the complete cells enable simulations of external quantum efficiency （EQE） without the need for variable parameters. Such simulations can be compared directly with EQE measurements. From these comparisons, it becomes possible to understand in detail the origins of optical and electronic gains and losses in thin film photovoltaics （PC） technologies and, as a result, the underlying performance limitations. In fact, optical losses that occur when above-bandgap photons are not absorbed in the active layers can be distinguished from electronic losses when electron-hole pairs generated in the active layers are not collected. This overall methodology has been applied to copper indium-gallium diselenide （Culn1-xGaxSe2; CIGS） solar cells, a key commercialized thin film PV technology. CIGS solar cells with both standard thickness （〉2 μm） and thin （〈1 μm） absorber layers are studied by applying SE to obtain inputs for EQE simulations and enabling comparisons of simulated and measured EQE spectra. SE data analysis is challenging for CIGS material components and solar cells because of the need to develop an appropriate （ε1, ε2） database for the CIGS alloys and to extract absorber layer Ga profiles for accurate structural/compositional models. For cells with standard thickness absorbers, excellent agreement is found between the simulated and measured EQE, the latter under the assumption of 100% collection from the active layers, which include the CIGS bulk and CIGS/CdS heterojunction inter

关键词： Solar cells Thin-film Ellipsometry Spectroscopic Culn1-xGaxSe2(CIGS) Optical properties Quantum efficiency External Simulation Solar-cell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Half a century after their discovery:Structural insights into exonuclease and annealase proteins catalyzing recombineering

引用

Engineering Microbiology 2024年第1期4卷 39-54页

作者： Lucy j.Fitschen Timothy P.Newing nikolas P.johnston Charles E.Bell Gökhan Tolun School of Chemistry and Molecular Bioscience and Molecular HorizonsUniversity of WollongongWollongongNSWAustralia The ARC Training Centre for Cryo-electron Microscopy of Membrane Proteins University of WollongongWollongongNSWAustralia Faculty of Science University of Technology SydneyUltimoNSW 2007Australia Department of Biological Chemistry and Pharmacology The Ohio State University College of MedicineColumbusOH 43210

Recombineering is an essential tool for molecular biologists,allowing for the facile and efficient manipulation of bacterial genomes directly in cells without the need for costly and laborious in vitro manipulations involving restriction *** main workhorses behind recombineering are bacteriophage proteins that promote the single-strand annealing(SSA)homologous recombination pathway to repair double-stranded DNA *** there have been several reviews examining recombineering methods and applications,comparatively few have focused on the mechanisms of the proteins that are the key players in the SSA pathway:a 5′→3′exonuclease and a single-strand annealing protein(SSAP or“annealase”).This review dives into the structures and functions of the two SSA recombination systems that were the first to be developed for recombineering in ***:the RecET system from *** Rac prophage and the𝜆Red system from bacteriophageλ.By comparing the structures of the RecT and Red𝛽annealases,and the RecE and𝜆Exo exonucleases,we provide new insights into how the structures of these proteins dictate their *** the sequence conservation of the𝜆λExo and RecE exonucleases gives more profound insights into their critical functional ***,as recombineering accelerates and evolves in the laboratory,a better understanding of the mechanisms of the proteins behind this powerful technique will drive the development of improved and expanded capabilities in the future.

关键词： Recombineering Redβ λExo RecE RecT Protein structure Annealase Exonuclease

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental impact assessment of emissions from non-recycled plastic-to-energy processes

引用

Waste Disposal and Sustainable Energy 2021年第1期3卷 1-11页

作者： Henry Zhang nikolas j.Themelis Athanasios Bourtsalas Montgomery High School SkillmanNJ 08558USA Earth Engineering Center Columbia UniversityNew YorkNY 10027USA

Generally,plastics pose a variety of environmental impacts due to their increased use and ***-of-life treatment is a viable way of recovering energy from plastics while at the same time reducing the amount of plastics disposed of in *** paper studies the environmental impact of Non-Recycled Plastics(NRP)-to-energy *** waste treatment processes were considered for NRP:pyrolysis,waste-to-energy(WtE),and *** environmental impact assessment results indicated that conversion technologies such as pyrolysis and WtE are preferred over *** total energy consumed in the pyrolysis process was 24635.7 Mj/*** conversion technologies have a lower environmental impact and produced net positive energy from *** global warming potential shows that pyrolysis(3.91 kg ***_(2))contributes the least to global warming than waste-to-energy(18.56 kg ***_(2))and landfill(17.5 kg ***_(2)).However,sensitivity analysis suggested that the inefficiencies of the current conversion technologies should be *** the two technologies studied,pyrolysis contributed less environmental burden,having a lower global warming potential,a higher efficiency in energy conversion,and less harmful emissions such as selenium and methane.

关键词： Non-recycled plastic Environmental impact assessment Life cycle impact assessment End-of-life treatment Waste-to-energy(WtE) Landfill Pyrolysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The value of community science data to analyze long-term avian trends in understudied regions:The state of birds in Türkiye

引用

Avian Research 2023年第4期14卷 695-705页

作者： Kyle D.Kittelberger Colby j.Tanner nikolas D.Orton Çagan Hakkı Sekercioglu School of Biological Sciences University of Utah257 S 1400 ESalt Lake CityUT84112USA KoçUniversity Department of Molecular Biology and GeneticsIstanbulTürkiye KuzeyDoga Dernegi Istasyon MahallesiIsmail Aytemiz Caddesi36200 KarsTürkiye

Recent studies have revealed concerning declines in bird populations in Europe and other parts of the *** understudied but biodiverse regions,especially those that are located along key migratory flyways,there is an unmet need to evaluate the status of resident and migratory birdlife for avian conservation *** is especially urgent at a time when recent regional studies have highlighted the scale of the decline of the European and Palearctic *** growing community science datasets may help bridge the gaps in our understanding of long-term regional avifaunal *** this study,we used eBird data submitted by observers in Türkiye to undertake the first long-term assessment of the state of the country’s birds from 2001 to *** evaluated population trends based on presence-absence data of species to determine if any birds have significantly increased or decreased in the country so far this *** provide a list of trends for 418 bird species that had large enough sample sizes of eBird observations from Türkiye,and highlight which species have significantly declined or *** found that 63 species have significantly declined in detection while 120 have significantly increased during the study *** findings provide a baseline for the future monitoring of Türkiye’s birds and help contextualize population changes of birds in Türkiye against those occurring at the continental(Palearctic)***,we include movement classifications for all of the bird species in this *** also provide a framework to effectively use eBird data to assess long-term avifaunal changes at the country-level in other understudied ***,we highlight ways in which eBirders in Türkiye and elsewhere can strengthen the quality and value of community ornithology data for population assessments and avian conservation ecology.

关键词： Avian ecology Bird conservation Citizen science Presence-absence Middle east Movement Palearctic Threat status

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deep-learning-assisted printed liquid metal sensory system for wearable applications and boxing training

引用

npj Flexible Electronics 2023年第1期7卷 177-186页

作者： Ye Qiu Zhihui Zou Zhanan Zou nikolas Kurnia Setiawan Karan Vivek Dikshit Gregory Whiting Fan Yang Wenan Zhang jiutian Lu Bingqing Zhong Huaping Wu jianliang Xiao College of Mechanical Engineering Zhejiang University of Technology310023 HangzhouChina Department of Mechanical Engineering University of Colorado Boulder80309 BoulderColoradoUSA College of Information Engineering Zhejiang University of Technology310023 HangzhouChina

Liquid metal(LM)exhibits a distinct combination of high electrical conductivity comparable to that of metals and exceptional deformability derived from its liquid state,thus it is considered a promising material for high-performance soft ***,rapid patterning LM to achieve a sensory system with high sensitivity remains a challenge,mainly attributed to the poor rheological property and ***,we report a rheological modification strategy of LM and strain redistribution mechanics to simultaneously simplify the scalable manufacturing process and significantly enhance the sensitivity of LM *** incorporating SiO_(2)particles into LM,the modulus,yield stress,and viscosity of the LM-SiO_(2)composite are drastically enhanced,enabling 3D printability on soft materials for stretchable *** sensors based on printed LM-SiO_(2)composite show excellent mechanical flexibility,robustness,strain,and pressure sensing *** sensors are integrated onto different locations of the human body for wearable ***,by integrating onto a tactile glove,the synergistic effect of strain and pressure sensing can decode the clenching posture and hitting strength in boxing *** assisted by a deeplearning algorithm,this tactile glove can achieve recognition of the technical execution of boxing punches,such as jab,swing,uppercut,and combination punches,with 90.5%*** integrated multifunctional sensory system can find wide applications in smart sport-training,intelligent soft robotics,and human-machine interfaces.

关键词： wear system liquid

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

多种交通方式下的城市空间分配

引用

城市交通 2012年第3期10卷 81-90,22页

作者： Eric j.Gonzales nikolas Geroliminis Michael j.Cassidy Carlos F.Daganzo 李长波(译) 美国加州大学伯克利分校交通研究院加利福尼亚州94720 瑞士洛桑联邦高等理工学院环境、建筑与土木工程学院洛桑CH-1015 中国城市规划设计研究院北京100037

从集计角度分析了运行多种交通方式的城市交通系统。利用目前已受关注的宏观基本图(简称MFD),描述城市交通的整体特性。以旧金山某区为例,使用现有数据,通过仿真论证如何应用MFD监管真实交通网络。然后讨论了同一路网中不同交通方式间... 详细信息

从集计角度分析了运行多种交通方式的城市交通系统。利用目前已受关注的宏观基本图(简称MFD),描述城市交通的整体特性。以旧金山某区为例,使用现有数据,通过仿真论证如何应用MFD监管真实交通网络。然后讨论了同一路网中不同交通方式间如何相互作用,以及如何将这些作用纳入包含多种交通方式路网的MFD。研究得到的两个主要结论是:1)证实了已有研究猜想——对市区拥挤区域限行,可提高包括被限行者在内的所有出行者的机动性;2)为公交方式提供专用道路空间可提高所有交通方式的可达性。

关键词：拥挤宏观基本图多种交通方式旧金山

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：