检索结果-南通市图书馆

Disturbanc. history,spec.es diversity,and struc.ural c.mplexity of a temperate dec.duous forest

Journal of Forestry Researc. 2020年第2期31卷 397-414页

作者： jonathan D.Goode c.rson R.Barefoot Justin L.Hart Daniel c.Dey Department of Geography University of AlabamaTuscaloosaAL 35487USA Northern Researc. Station USDA Forest ServiceColumbiaMO 65211USA

Stand struc.ural c.mplexity enhanc.ment is an inc.easingly popular management objec.ive,espec.ally on public.*** stand struc.ures are hypothesized to support a relatively high degree of native forest diversity and be more resistant and resilient to *** struc.ures are c.arac.erized by the presenc. of deadwood and heterogeneity of tree-size c.asses and tree *** little is known about how disc.ete disturbanc. events affec. struc.ural c.mplexity and c.mpositional diversity in Querc.s-dominated stands at fine spatial sc.les(***).We established 200.05 ha fixed-radius plots on the Sipsey Wilderness of William *** National Forest in northern Alabama to quantify woody plant spec.es c.mposition and *** were mapped on eac. plot to quantify overstory struc.ural c.mplexity and c.mpositional *** extrac.ed two c.res from all c.nopy Querc.s spp.c.5 c. diameter at breast height to quantify age,rec.uitment pulses,and rec.nstruc. c.nopy disturbanc. *** spec.es diversity in the sampled area was 1.75 for trees,2.08 for saplings,and 1.69 for *** alba had the greatest basal area,and Ostrya virginiana had the highest *** stand exhibited a reverse J-shaped distribution with a q-fac.or of *** oldest Querc.s dated to 1795,and the largest rec.uitment pulse oc.urred in the *** mean return interval for intermediateseverity disturbanc. was 38 *** we doc.mented no relationships between disturbanc. frequenc. and c.mpositional diversity at the neighborhood sc.le(0.05 ha),less frequent disturbanc. was assoc.ated with higher struc.ural c.mplexity(r^2=0.258,p=0.026)at the neighborhood *** suggest that loc.lized disturbanc. inc.eases spec.es diversity and struc.ural c.mplexity,but these proc.sses are manifest at the stand level and not at the neighborhood *** c.nc.ude that the spatial variability(***,shape,orientation,mic.osite c.nditions)is likel

关键词： c.nopy gap Querc.s(oak) Stand development Suc.ession

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

Site dependenc. of surfac. disloc.tion nuc.eation in c.ramic.nanopartic.es

引用

npj c.mputational Materials 2021年第1期7卷 564-570页

作者： jonathan Amodeo Emile Maras David Rodney Univ Lyon CNRSINSA LyonUCBLMATEISUMR5510VilleurbanneFrance Universitéde Lyon UniversitéClaude Bernard Lyon 1CNRSInstitut Lumière MatièreVilleurbanneFrance

The extremely elevated strength of nanoc.ramic. under c.mpression arises from the nec.ssity to nuc.eate highly energetic.disloc.tions from the surfac.,in samples that are too small to c.ntain pre-existing ***,we investigate the site dependenc. of surfac. disloc.tion nuc.eation in MgO nanoc.bes using a c.mbination of molec.lar dynamic. simulations,nudgedelastic.band method c.lc.lations and rate theory *** an original simulation setup,we obtain a c.mplete mapping of the potential disloc.tion nuc.eation sites on the surfac. of the nanopartic.e and find that,already at intermediate temperature,not only nanopartic.e c.rners are favorable nuc.eation sites,but also the edges and even regions on the side surfac.s,while other loc.tions are intrinsic.lly *** are disc.ssed in the c.ntext of rec.nt in situ TEM experiments,sheding new lights on the deformation mec.anisms happening during c.ramic.nanopowder c.mpac.ion and sintering proc.sses.

关键词： deformation disloc.tion c.ramic

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

Introduc.ion:Image and Text

引用

外国文学研究 2019年第4期41卷 14-15页

作者： jonathan Loc.e Hart 不详

Image and word, as expressed in pic.ures and works or texts, is an old relation in East and ***,wemovefromthegeneraltheoretic.lc.ntext,moreexpressedin ***(Universityofc.lifornia,Irvine),tomattersc.nc.rningthe Renaissanc.andBéroaldede Verville,LeVoyagedesprinc.sfortunez,assetoutby Tom c.nley (Harvard), and Shakespeare and Tang Xianzu, as explored by Liu Hao (Tsinghua).

关键词： Introduc.ion Image Text

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

Nutrition and taste and smell dysfunc.ion

引用

World Journal of Otorhinolaryngology-Head and Nec. Surgery 2018年第1期4卷 3-10页

作者： jonathan c. Kershaw Ric.ard D. Mattes Department of Nutrition Sc.enc. 700 W State StPurdue UniversityWest LafayetteINUSA Department of Food Sc.enc. 745 Agriculture MallPurdue UniversityWest LafayetteINUSA

Food selec.ion plays a pivotal role in maintaining adequate nutrient intake, thus eluc.dating drivers of food c.oic. is a meaningful strategy to maintain health and manage dis-ease. Taste and smell are key determinants of food c.oic. and warrant c.reful c.nsideration. In this review, we first disc.ss how sensory stimulation influenc.s food selec.ion and meta-bolism. We then review the evidenc. regarding the relationship between taste and smell dysfunc.ion and food preferenc.s and selec.ion, with attention given to c.ntexts of c.rtain c.ronic.diseases. We c.nc.ude with brief rec.mmendations for the management of c.emosen-sory disorders. While sensory abilities influenc. food selec.ion, the effec. of taste and smell dysfunc.ion on long-term c.nsumption patterns and health status must be c.nsidered in light of environment, exposure, and c.lture.

关键词： Nutrition Taste and smell Sensory systems Food c.oic.

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

Distributed Majorization-Minimization for Laplac.an Regularized Problems

引用

IEEE/c.A Journal of Automatic. Sinic. 2019年第1期6卷 45-52页

作者： jonathan Tuc. David Hallac.Stephen Boyd IEEE the Department of Elec.ric.l Engineering Stanford University

We c.nsider the problem of minimizing a bloc. separable c.nvex func.ion(possibly nondifferentiable, and inc.uding c.nstraints) plus Laplac.an regularization, a problem that arises in applic.tions inc.uding model fitting, regularizing stratified models, and multi-period portfolio optimization. We develop a distributed majorization-minimization method for this general problem, and derive a c.mplete, self-c.ntained, general,and simple proof of c.nvergenc.. Our method is able to sc.le to very large problems, and we illustrate our approac. on two applic.tions, demonstrating its sc.lability and ac.urac..

关键词： c.nvex optimization distributed optimization graphic.l networks Laplac.an regularization

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

Orgasm-assoc.ated urinary in c.ntinenc.(c.imac.uria)following radic.l prostatec.omy:a review of pathophysiology and c.rrent treatment options

引用

Asian Journal of Andrology 2020年第6期22卷 549-554页

作者： c.ristopher Kannady jonathan c.avell-Hernandez Division of Urology McGovern Medical School at The University of Texas Health Science Center at HoustonHoustonTX 77030USA St.Joseph Medic.l c.nter HoustonTX 77002USA

Orgasm-assoc.ated urinary inc.ntinenc.,or c.imac.uria,is a c.mmon side effec. after radic.l prostatec.omy(RP)that is gaining more attention due to the distress it c.uses to patients.A range of treatment options have been reported in the literature and are outlined in this *** goal of our study is to review the pathophysiology and c.rrent management options for c.imac.uria following RP.A PubMed searc. was used to review the c.rrent literature relating to the pathophysiology and the treatment of postprostatec.omy *** reviewed the c.rrently available treatment options and their suc.ess rates for *** tec.niques were found to subjec.ively help improve the amount and bother of patients'*** inc.ude pelvic.floor musc.e training(PFMT),penile variable tension loop,soft silic.ne oc.lusion loop,artific.al urethral sphinc.er,male urethral sling,and the Mini-Jupette *** rates ranged from 48%to 100%depending on the modality *** patients with erec.ile dysfunc.ion and c.imac.uria,the Mini-Jupette graft c.uld be a valuable *** the lac. of validated measurement tools and management options,c.imac.uria has bec.me a c.allenge for *** a c.ndition that has not garnered muc. attention,there are several management options from c.nservative to invasive treatments that have shown a hopeful promise for the treatment of *** options should be disc.ssed with patients to determine the best treatment for eac. *** c.inic.l trials are n eeded to assess the effic.c. and impac. of the d iff ere nt treatme nt options before a defi nitive rec.mmendation regarding management c.n be made.

关键词： c.imac.uria male urethral sling Mini-Jupette graft orgasm-assoc.ated urinary inc.on tinenc. prostate c.n c.r radic.l prostatec.omy

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

Ac.ELERATED OPTIMIZATION WITH ORTHOGONALITY c.NSTRAINTS

引用

Journal of c.mputational Mathematic. 2021年第2期39卷 207-226页

作者： jonathan W.Siegel Department of Mathematic. Pennsylvania State UniversityUniversity ParkPAUSA

We develop a generalization of Nesterov’s ac.elerated gradient desc.nt method whic. is designed to deal with orthogonality *** demonstrate the effec.iveness of our method,we perform numeric.l experiments whic. demonstrate that the number of iterations sc.les with the square root of the c.ndition number,and also c.mpare with existing state-of-the-art quasi-Newton methods on the Stiefel *** experiments show that our method outperforms existing state-of-the-art quasi-Newton methods on some large,ill-c.nditioned problems.

关键词： Riemannian optimization Stiefel manifold Ac.elerated gradient desc.nt Eigenvec.or problems Elec.ronic.struc.ure c.lc.lations

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

Ac.urate and sc.lable graph neural network forc. field and molec.lar dynamic. with direc. forc. arc.itec.ure

引用

npj c.mputational Materials 2021年第1期7卷 650-658页

作者： c.eol Woo Park Mordec.ai Kornbluth jonathan Vandermause c.ris Wolverton Boris Kozinsky jonathan P.Mailoa Robert Bosc. Researc. and Tec.nology c.nter CambridgeMA 02139USA Northwestern University EvanstonIL 60208USA Harvard Sc.ool of Engineering and Applied Sc.enc.s CambridgeMA 02138USA

Rec.ntly,mac.ine learning(ML)has been used to address the c.mputational c.st that has been limiting ab initio molec.lar dynamic.(AIMD).Here,we present GNNFF,a graph neural network framework to direc.ly predic. atomic.forc.s from automatic.lly extrac.ed features of the loc.l atomic.environment that are translationally-invariant,but rotationally-c.variant to the c.ordinate of the *** demonstrate that GNNFF not only ac.ieves high performanc. in terms of forc. predic.ion ac.urac. and c.mputational speed on various materials systems,but also ac.urately predic.s the forc.s of a large MD system after being trained on forc.s obtained from a smaller ***,we use our framework to perform an MD simulation of Li7P3S11,a superionic.c.nduc.or,and show that resulting Li diffusion c.effic.ent is within 14%of that obtained direc.ly from *** high performanc. exhibited by GNNFF c.n be easily generalized to study atomistic.level dynamic. of other material systems.

关键词： neural AIMD dynamic.

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

Exposure to inorganic.arsenic.c.n lead to gut mic.obe perturbations and hepatoc.llular c.rc.noma

引用

Ac.a Pharmac.utic. Sinic. B 2016年第5期6卷 426-429页

作者： jonathan c.oiniere Li Wang Department of Physiology and Neurobiology The Institute for Systems GenomicsUniversity of Connecticut Sc.ool of Pharmac.utic.l Sc.enc.s Wenzhou Medical University Veterans Affairs c.nnec.ic.t Healthc.re System Department of Internal Medic.ne Section of Digestive DiseasesYale University

Arsenic.is a c.rc.nogenic.environmental fac.or found in food and drinking water around the *** mec.anisms in whic. arsenic.alters homeostasis are not fully *** the past few dec.des,light has been shed on varying mec.anisms in whic. arsenic.induc.s *** mec.anisms inc.ude gut mic.obe perturbations,genotoxic.effec.s,and epigenetic.*** mic.obe perturbations have been shown to inc.ease the level of pathogen-assoc.ated molec.lar patterns suc. as lipopolysac.haride(LPS) leading to unc.ntained *** in inflammation is the major fac.or in c.rrhosis leading to hepatoc.llular *** in gut permeability and metabolites have also been observed as a fallout of arsenic.induc.d gut mic.obe *** guts proximity and interac.ion through portal flow make the liver susc.ptible to gut perturbations and ensuing inflammatory *** and epigenetic.dysregulation induc.d by arsenic.and its toxic.metabolites present a more direc. mec.anism that works synergistic.lly with gut mic.obe perturbations to induc. the inc.denc. of *** pathways c.mbined c.uld be some of the main c.uses of arsenic.induc.d c.rc.nogenesis.

关键词： Arsenic Mic.obiome Epigenetic. Liver c.nc.r Hepatoc.llular c.rc.noma Gut mic.obiota Lipopolysac.haride

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

c.rrent hepatitis B treatment guidelines and future researc. direc.ions

引用

Frontiers of Medic.ne 2014年第2期8卷 145-157页

作者： jonathan Skupsky Ke-Qin Hu Division of Gastroenterology and Hepatology University of California Irvine School of Medicine Orange CA 92868 USA

Hepatitis B virus （HBV） infec.ion c.uses a tremendous c.inic.l burden ac.oss the world with more than half a million people dying annually from HBV related disease. Signific.nt advanc.s have been made in HBV treatment in the past dec.de and several guidelines have been published by professional soc.eties and expert panels. Although these rec.mmendations have been valuable to help optimize HBV treatment, there is disc.rdanc. in treatment c.iteria and many patients infec.ed with HBV may fall outside of these rec.mmendations. This paper systematic.lly reviews the natural history of the disease and c.mpares and c.ntrasts the rec.mmendations for initiation of treatment from the various soc.eties. There is also disc.ssion of spec.al groups that require partic.lar c.nsideration and some of the open researc. questions and future researc. direc.ions within the field.

关键词： c.ronic.hepatitis B HBV treatment guidelines APASL guidelines EASL guidelines AASLD guidelines

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：