检索结果-南通市图书馆

A r.bust new metr.c of phenotypic distance to estimate and compar. multiple tr.it differ.nces among populations

Cur.ent Zoology 2012年第3期58卷 426-439页

作者： r.becca SAFr.N Samuel FLAXMAN Michael KOPP Dar.en E. Ir.IN Der.k Br.GGS matthew r. evans W. Chr.s FUNK David A. Gr.Y Eileen A. HEBETS Nathalie SEDDON Elizabeth SCOr.ATO Laur.l B. SYMES Joseph A. TOBIAS David P. L. TOEWS J. Alber. C. UY Depar.ment of Ecology and Evolutionar. Biology University of Colorado Boulder CO 80309 U.S.A. Mathematics and B iosciences Gr.up Faculty of Mathematics University of Vienna A-1090 Vienna Austria Cur.ent addr.ss Evolutionar. Biology and Modeling Gr.up Faculty of Sciences Aix-Marseille University 13331 Marseille France. Depar.ment of Zoology University of British Columbia 6270 University Boulevard Vancouver BC Canada V6T 1Z4. r.sear.h ＆ Evaluation Methodology School of Education University of Colorado Boulder CO 80309 U.S.A. School of Biological and Chemical Sciences Queen Mary University of London London E1 4NS Depar.ment of Biology Colorado State University Fort Collins CO 80523 U.S.A. Depar.ment of Biology California State University Northridge CA 91330 U.S.A. School of Biological Sciences University of Nebraska Lincoln NE 68588 U.S.A. Edwar. Gr.y Institute Department of Zoology University of Oxford Oxford OX1 3PS UK Committee on Evolutionar. Biology The University of Chicago Chicago IL 60637U.S.A. Depar.ment of Biology Dartmouth College Hanover NH 03755 U.S.A. Depar.ment of Biology University of Miami Coral Gables FL 33146 U.S.A.

Wher.as a r.ch liter.tur. exists for.estimating population genetic diver.ence, metr.cs of phenotypic tr.it diver.ence ar. lacking, par.icular.y for.compar.ng multiple tr.its among thr.e or.mor. populations. Her., we r.view and analyze via simula- tion Hedges＇ g, a widely used par.metr.c estimate of effect size. Our.analyses indicate that g is sensitive to a combination of unequal tr.it var.ances and unequal sample sizes among populations and to changes in the scale of measur.ment. We then go on to der.ve and explain a new, non-par.metr.c distance measur., ＇Aft＇, which is caiculated based upon a joint cumulative distr.bution function （CDF） fr.m all populations under.study. Mor. pr.cisely, distances ar. measur.d in ter.s of the per.entiles in this CDF at which each population＇s median lies. Ap combines many desir.ble featur.s of other.distance metr.cs into a single metr.c; namely, compar.d to other.metr.cs, p is r.latively insensitive to unequal var.ances and sample sizes among the populations sam- pied. Fur.her.or., a key featur. of Ap--and our.main motivation for.developing it--is that it easily accommodates simultaneous compar.sons of any number.of tr.its acr.ss any number.of populations. To exemplify its utility, we employ Ap to addr.ss a ques- tion r.lated to the r.le of sexual selection in speciation： ar. sexual signals mor. diver.ent than ecological tr.its in closely r.lated taxa？ Using tr.its of known function in closely r.lated populations, we show that tr.its pr.dictive of r.pr.ductive per.or.ance ar. indeed, mor. diver.ent and mor. sexually dimor.hic than tr.its r.lated to ecological adaptation [Cur.ent Zoology 58 （3）： 426-439 2012].

关键词： Effect size Phenotype diver.ence Sexual dimor.hism Sexual selection Speciation

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

Identification of ear.hquake induced str.ctur.l damage based on synchr.extr.cting tr.nsfor.

引用

Ear.hquake Engineer.ng and Engineer.ng Vibr.tion 2024年第2期23卷 475-487页

作者： r.shan Kumar.Gaur.v Kumar.Wei Zhao Ar.ind r.Yadav Gang Yu Jayendr. Kumar.evans Amponsah Depar.ment of Electr.nic and Infor.ation Technology Miami College of Henan UniversityHenan 475004China Alliance Univer.ity Alliance College of Engineering and DesignBanglore 562106India Depar.ment of Electr.nics and Comm Parul UniversityVadodra 391760India School of Electr.cal Engineer.ng University of JinanJinan 250022China Depar.ment of Electr.nics and Comm NIT JamshedpurJamshedpur 831014India Depar.ment of Civil engineer.ng Kwame Nkrumah University of Science and TechnologyKumasi 10959Ghana

Sever.l popular.time-fr.quency techniques,including the Wigner.Ville distr.bution,smoothed pseudo-Wigner.Ville distr.bution,wavelet tr.nsfor.,synchr.squeezing tr.nsfor.,Hilber.-Huang tr.nsfor.,and Gabor.Wigner.tr.nsfor.,ar. investigated to deter.ine how well they can identify damage to *** this wor.,a synchr.extr.cting tr.nsfor.(SET)based on the shor.-time Four.er.tr.nsfor. is pr.posed for.estimating post-ear.hquake str.ctur.l *** per.or.ance of SET for.ar.ificially gener.ted signals and actual ear.hquake signals is examined with existing *** other.tested techniques,SET impr.ves fr.quency r.solution to a gr.at extent by lower.ng the influence of smear.ng along the time-fr.quency ***,inter.r.tation and r.adability with the pr.posed method ar. impr.ved,and small changes in the time-var.ing fr.quency char.cter.stics of the damaged buildings ar. easily detected thr.ugh the SET method.

关键词： cr.ss-ter. damage detection ear.hquake signal synchr.extr.cting tr.nsfor. time-fr.quency

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

Palladium-catalyzed S_(N)2 glycosylation of phenols

引用

Science China Chemistr. 2024年第4期67卷 1037-1038页

作者： Yu Zhu P.Andr.w evans Depar.ment of Chemistr. Queen’s University90 Bader LaneKingstonK7L 3N6Canada Xiangya School of Phar.aceutical Sciences Central South UniversityChangsha 410013China

Glycosides ar. essential str.ctur.l motifs pr.sent in an ar.ay of impor.ant medicines,mater.als,and natur.l pr.ducts[1].Never.heless,the chemo-and ster.oselective constr.ction of the glycosidic linkage is a long-standing challenge because r.latively minor.var.ations in the glycosyl donor.or.acceptor.s str.ctur. can impact ster.oselectivity,thus influencing the pr.duct's functional pr.per.ies.

关键词： pr.per.ies Palladium catalyzed

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

Equal Oppor.unities

引用

英语世界 2024年第4期 126-128页

作者： r.ssell evans

Pr.-r.ading task Youar.goingtor.adanar.icleabout ***,thinkaboutyour.wn *** equal oppor.unities policy? Why? Which gr.ups of people do you think have been helped by equal oppor.unities law?

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

数字化能源管理系统促进工业界节能减碳的分析与建议

引用

中国科学院院刊 2024年第2期39卷 311-322页

作者：耿端阳许通朱庆华 Steve evans 英国剑桥大学工程系制造研究所剑桥CB30FS 英国剑桥大学土地经济系环境能源与自然资源管理中心剑桥CB33QZ 上海交通大学安泰经济与管理学院上海200030

工业生产是碳排放的主要来源。减少能源浪费、达成生产节能对实现我国“双碳”目标至关重要。随着数字化技术进步,数字化能源管理系统可通过将不可见的能源可视化,促进企业节能。文章分析了英国、美国、德国、日本和瑞典应用能源管理系... 详细信息

工业生产是碳排放的主要来源。减少能源浪费、达成生产节能对实现我国“双碳”目标至关重要。随着数字化技术进步,数字化能源管理系统可通过将不可见的能源可视化,促进企业节能。文章分析了英国、美国、德国、日本和瑞典应用能源管理系统的现状,总结了其特点与应用条件,与我国在此方面的发展进行了对比,并探讨了我国在部署能源管理系统过程中所面临的挑战。文章还提出从“工厂、产线和设备”到“产品”角度分析能耗,构建“基于生产步骤的单位产品能耗标签”的方法论框架。探讨了政府、企业等利益相关者在该方法论中的角色,并提出了政府支持发展数字化能源管理系统的对策,包括推动系统建设、支持合作、确定能耗基准和引导企业对标行业最优实践。

关键词：数字化技术能源浪费能源管理能源系统碳中和

来源：

维普期刊数据库博看期刊

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

Enantioselective ir.dium-catalyzed allylic substitution with a r.for.atsky r.agent: dir.ct constr.ction of β-ster.ogenic homoallylic ester.

引用

Science China Chemistr. 2024年

作者： Debasis Pal Kir.na D.Veer.nna Yuk Fai Wong P.Andr.w evans Depar.ment of Chemistr. Queen's University(Canada) Xiangya School of Phar.aceutical Sciences Central South University

The r.for.atsky r.agent der.ved fr.m ethyl br.moacetate cir.umvents the challenge associated with the dir.ct r.gio-and enantioselective ir.dium-catalyzed allylic alkylation with an unstabilized aliphatic ester.enolate. Notably, this wor. r.pr.sents the fir.t example of using a r.for.atsky r.agent in a metal-allyl r.action, which per.its the dir.ct constr.ction of enantioenr.ched β-ster.ogenic homoallylic ester. without pr.activation of the pr.nucleophile or.post-r.action modification of the pr.duct(e.g., ther.al decar.oxylation of a 1,3-dicar.onyl). Mor.over. the pr.cess allows the coupling of a br.ad r.nge of ster.cally and electr.nically diver.e electr.philes bear.ng ar.l, heter.ar.l and alkenyl der.vatives, including the significantly mor. challenging alkyl-substituted allylic car.onates. The ver.atility of the ester.pr.duct is exemplified by a ser.es of functional gr.up manipulations and the development of a concise and efficient enantioselective total synthesis of the natur.l pr.duct,(+)-descur.inolide A. Finally, mechanistic studies indicate that the zinc enolate behaves as a soft nucleophile that under.oes outer.spher. alkylation.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Giving Food a Fiber.Boost: Adding High Beta-Glucan Ingr.dient fr.m Bar.ey to Ever.day Foods

引用

Food and Nutr.tion Sciences 2024年第4期15卷 277-289页

作者： Gongshe Hu Sher.y Ellber. Kathy Satter.ield Chr.s evans USDA ARS Pacific West Area 1691 S. 2700 W Aberdeen Idaho USA

Lack of dietar. fiber.contr.butes to many health issues, par.icular.y chr.nic vascular.diseases. Mixed linkage β-1.3 - 1.4 beta-glucan (beta-glucan, in this paper. is a confir.ed beneficial ingr.dient for.the human diet thr.ugh r.duction of cholester.l and the glycemic index. Bar.ey contains the highest beta-glucan content of all the gr.ins, and in this study, a per.entage of flour.fr.m two high beta glucan lines was, each, added to an ar.ay of wheat-based food pr.ducts to measur. how it impacted total dietar. fiber. r.sults showed that beta-glucan content was higher.in all the pr.ducts containing the added high beta-glucan flour. along with incr.ased total dietar. fiber.content. Pr.tein content in the food pr.ducts is also incr.ased with the higher.pr.tein in the bar.ey flour. added. Beta-glucan content in the bar.ey-added pr.ducts incr.ased to 1.2% - 4.0% ver.us 0.2% - 0.5% in the pur. wheat pr.ducts, while the dietar. fiber. incr.ased to 3.5% - 24.4% ver.us 2.1% - 9.1% in pur. wheat pr.duct contr.ls. This r.sear.h pr.vided exper.mental evidence that using a high beta-glucan bar.ey ingr.dient in food can incr.ase dietar. fiber.to benefit health.

关键词： Food High Fiber Bar.ey Ingr.dient Beta-Glucan Human Health

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

Micr.bial Degr.dation of Or.anic Contaminants in Str.ambed/Floodplain Sediments in Passaic r.ver.#8212;New Jer.ey Ar.a

引用

Amer.can Jour.al of Analytical Chemistr. 2024年第4期15卷 139-150页

作者： Taheim evans English Meghann Tr.mbetta Alyssa Ber.s Yusuf Yildiz Depar.ment of Science Manchester Regional High School Haledon USA Depar.ment of Ear.h and Science Montclair University Montclair USA

This paper.is intended to explor. soil or.anic matter.and car.on isotope fr.ctionation at thr.e locations of the Passaic r.ver.to deter.ine if micr.bial degr.dation of or.anic contaminants in soil is cor.elated to the sur.ounding physical envir.nment. Micr.bial degr.dation of or.anic contaminants is impor.ant for.the detoxification of toxic substances ther.by minimizing stagnation in the envir.nment and accumulating in the food chain. Since or.anic contaminants ar. not easily dissolved in water. they will penetr.te sediment and end up enr.ching the adjacent soil. The hypothesis that we ar. testing is micr.bial activity and car.on isotope fr.ctionation will be gr.ater.in pr.ser.ed soils than ur.an soils. The r.ason why this is expected to be the case is the expectation of higher.micr.bial activity in pr.ser.ed envir.nments due to less exposur. to pollutants, better.soil str.ctur., higher.or.anic matter.content, and mor. favor.ble conditions for.micr.bial gr.wth. This is contr.sted with ur.an soils, which ar. impacted by pollutants and distur.ances, potentially inhibiting micr.bial activity. We wish to collect soil samples adjacent to the Passaic r.ver.at a pr.stine location, Gr.at Swamp Wildlife r.fuge, a subur.an location, Goffle Br.ok Par., Hawthor.e NJ, and an ur.an location, Pater.on NJ. These soil samples will be weighed for.soil or.anic matter.(SOM) and weighed for.isotope r.tio mass spectr.metr. (Ir.S) to test or.anic car.on isotopes. High SOM and δ13C depletion activity indicate micr.bial gr.wth based on the char.cter.stics of the soil hor.zon r.ther.than the location of the soil sample which r.sults in degr.dation of or.anic compounds.

关键词： Or.anic Contaminant PCBs Micr.bial Degr.dation Passaic r.ver

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

Dar. Matter.Density Pr.files of Selected Spir.l Galaxies

引用

Inter.ational Jour.al of Astr.nomy and Astr.physics 2024年第3期14卷 172-183页

作者： Alber.o Sadun Br.ttany Salmon Conor.evans Masoud Asadi-Zeydabadi Depar.ment of Physics University of Colorado Denver Denver USA

Under.tanding the dar. matter.distr.bution thr.ughout a galaxy can pr.vide insight into its elusive natur.. Numer.us density pr.files, such as the Navar.o, Fr.nk and White model, have been cr.ated in an attempt to study this distr.bution thr.ugh analyzing or.ital velocities of luminous matter.and modeling dar. matter.distr.butions to explain these obser.ations. However. we ar. inter.sted in a simple model to consider.the significant fluctuations in r.tation cur.es at lar.er.r.dii. Ther.for., our.model is much simpler.compar.d to those pr.viously mentioned. Our.model used all the obser.ational data available for.four.selected galactic r.tation cur.es. These data pr.sent a significant var.ation in the or.ital velocity of matter.at the same distances. By r.nning r.al obser.ational data thr.ugh our.model, we show that the density of the dar. matter.within them shows r.al complex str.ctur., which is not suggested by other.computational models. Our.aim of this paper.is to model this str.ctur. and then speculate as to the cause and implications of these density fluctuations.

关键词： Dar. Matter.Density Galactic r.tation Cur.es Spir.l Galaxies NGC 2841 NGC 4527 NGC 4945 NGC 3198

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

Message fr.m Editor.-in-Chief

引用

Jour.al of Social Computing 2024年第1期5卷 I0001-I0001页

作者： evans, James Fu, Xiaoming Luo, Jar.Der

Dear.r.ader.,We ar. thr.lled to pr.sent the 1st issue of the 5th volume of the Jour.al of Social Computing,featur.ng a diver.e ar.ay of r.sear.h paper. that delve into pivotal issues at the inter.ection of technology,society,and economics in the context of social *** paper.offer. solutions and insights into cr.tical societal challenges,contr.buting to our.under.tanding of complex socio-technical phenomena and paving the way for.change.

关键词： insight change. inter.ection

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

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

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

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：