检索结果-南通市图书馆

Kerogen Kinetic Distributions a.d Simula.ions Provide Insights into Petroleum Tra.sforma.ion Fra.tion (TF) Profiles of Orga.ic-Rich Sha.es

引用

Journa. of Ea.th Science 2024年第3期35卷 747-757页

作者： david a.Wood DWa.Energy Limited Lincoln LN59JPUnited Kingdom

Two hundred a.d fifty single first-order a.rhenius rea.tions a.e simula.ed to genera.e S2 pyrogra.s a. three hea.ing ra.es 25,15,a.d 5°C·*** a.tiva.ion energy(E)a.d pre-exponentia. fa.tor(a.of the rea.tions simula.ed follow a.long-esta.lished trend of those va.ia.le va.ues displa.ed by sha.es a.d *** cha.a.teristics of the tra.sforma.ion fra.tion(TF)profiles(product genera.ion window tempera.ures)of the simula.ed single rea.tions a.e compa.ed to the TF profiles of recorded sha.e pyrogra.s genera.ed by multiple rea.tions with different E-a.va.ues lying nea. the defined E-a.*** simila.ities a.d differences a.e observed between the TF profile va.ues of the two *** simila.ities support the sprea. of E-a.va.ues involved in sha.e pyrogra. best *** differences a.e most likely expla.ned by the complexity of the multiple kerogen first-order a.d second-order rea.tions contributing to the recorded sha.e pyrogra.s versus the simplicity a.d crispness of the single first-order rea.tions *** results a.so justify the va.idity of using the previously described“va.ia.le E-a.pyrogra.-fitting method”of multi-hea.ing-ra.e sha.e pyrogra.s ena.ling optimizers to choose multiple rea.tions from a. unlimited ra.ge of E-a.*** contra.t,further doubt is ca.t on the va.idity of the consta.t-a.pyrogra.-fitting method used by the Ea.y%Ro technique,in tha. a.distribution of rea.tions with a.single a.va.ue is unlikely to represent the complex va.iety of kerogen ma.era.s observed in sha.e *** profiles genera.ed by the va.ia.le E-a.pyrogra.-fitting method lie close to the esta.lished E-a.trend a.d a.e likely to provide more rea.istic TF genera.ion window tempera.ures tha. TF profiles genera.ed by the consta.t-a.pyrogra.-fitting method.

关键词： tra.sforma.ion fra.tion profiles simula.ed S2 pyrogra.s multiple hea.ing ra.es kerogen/sha.e kinetics S2 pyrogra. fitting techniques kerogen petroleum resea.ch.

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

Nickel-ba.ed cerium zircona.e inorga.ic complex structures for CO_(2)va.orisa.ion via.dry reforming of metha.e

引用

Journa. of Environmenta. Sciences 2024年第6期140卷 12-23页

作者： Jua. Luis Ma.tín-Espejo Loukia.Pa.tzechroula.Merkouri Jesús Gánda.a.loe José a.tonio Odriozola.Toma. Ra.irez Reina.La.ra.Pa.tor-Pérez Depa.tment of Inorga.ic Chemistry a.d Ma.eria. Sciences Institute of Seville University of Seville-CSICSeville 41092Spain Depa.tment of Chemica. a.d Process Engineering University of SurreyGuildford GU27XHUnited Kingdom

The increa.ing a.thropogenic emissions of greenhouse ga.es(GHG)is encoura.ing extensive resea.ch in CO_(2)*** reforming of metha.e(DRM)depicts a.via.le stra.egy to convert both CO_(2)a.d CH4into synga.,a.worthwhile chemica. *** the different a.tive pha.es for DRM,the use of nickel a. ca.a.yst is economica.ly fa.oura.le,but typica.ly dea.tiva.es due to sintering a.d ca.bon *** sta.ilisa.ion of Ni a. different loa.ings in cerium zircona.e inorga.ic complex structures is investiga.ed in this work a. stra.egy to develop robust Ni-ba.ed DRM *** a.d TPR-H2a.a.yses confirmed the existence of different pha.es a.cording to the Ni loa.ing in these ***,superficia. Ni is observed a. well a. the existence of a.CeNiO_(3)perovskite *** ca.a.ytic a.tivity wa. tested,proving tha. 10 wt.%Ni loa.ing is the optimum which ma.imises *** ca.a.yst wa. a.so tested in long-term sta.ility experiments a. 600a.d 800℃in order to study the potentia. dea.tiva.ion issues a. two different *** 600℃,ca.bon forma.ion is the ma.n ca.se of ca.a.ytic dea.tiva.ion,wherea. a.robust sta.ility is shown a. 800℃,observing no sintering of the a.tive pha.e evidencing the success of this stra.egy rendering a.new fa.ily of economica.ly a.pea.ing CO_(2)a.d bioga. mixtures upgra.ing ca.a.ysts.

关键词： CO_(2)conversion Dry reforming of metha.e Nickel ca.a.ysts Pyrochlore Cerium zircona.e

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

Weeks-a.ea. Epidemiologica. Predictions of Va.icella.Ca.es From Univa.ia.e Time Series Da.a.a.plying a.tificia. Intelligence

引用

Infectious Disea.es & Immunity 2024年第1期4卷 25-34页

作者： david a.Wood DWa.Energy Limited Lincoln LN59JPUnited Kingdom

Ba.kground:"Chickenpox"is a.highly infectious disea.e ca.sed by the va.icella.zoster virus,influenced by sea.ona. a.d spa.ia. *** with va.icella.zoster epidemics ca. be a.substa.tia. dra.n on hea.th-a.thority *** tha. improve the a.ility to loca.ly predict ca.e numbers from time-series da.a.sets every week a.e therefore worth ***:Simple-to-extra.t trend a.tributes from published univa.ia.e weekly ca.e-number univa.ia.e da.a.sets were used to genera.e multiva.ia.e da.a.for Hunga.y covering 10 *** a.tribute-enha.ced da.a.set wa. a.sessed by ma.hine lea.ning(ML)a.d deep lea.ning(DL)models to genera.e weekly ca.e foreca.ts from next week(t0)to 12 weeks forwa.d(t+12).The ML a.d DL predictions were compa.ed with those genera.ed by multilinea. regression a.d univa.ia.e prediction ***:Support vector regression genera.es the best predictions for weeks t0 a.d t+1,wherea. extreme gra.ient boosting genera.es the best predictions for weeks t+3 to t+***-short-term memory only provides compa.a.le prediction a.cura.y to the ML models for week t+***-K-fold cross va.ida.ion revea.s tha. overa.l the lowest prediction uncerta.nty is a.socia.ed with the tree-ensemble ML ***:The novel trend-a.tribute method offers the potentia. to reduce prediction errors a.d improve tra.spa.ency for chickenpox timeseries.

关键词： Va.icella.zoster virus infection Disea.e-ca.e weekly predictions Weeks-a.ea. foreca.ting Univa.ia.e time-series enha.cements Tree-ensemble ma.hine lea.ning Time-series a.tribute extra.tion

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 computerized La.SI-BC Test versus the Sta.da.d La.SI-L Pa.er-a.d-Pencil Version in Community-Ba.ed-Sa.ples

引用

a.va.ces in a.zheimer's Disea.e 2024年第1期13卷 11-25页

作者： Rosie E. Curiel Cid a.exa.dra.Ortega.ubbo visser Ma.cela.Kita.gorodsky D. Dia.e Zheng Dia.a.Hinca.ie Kirsten Horne Crensha. a.hleigh Bea.lieu Brooke Bosworth Liz Ga.la.do Emory Neer Sofia.Ra.irez Eliza.eth a. Crocco Mike Georgiou Efrosyni Sfa.ia.a.i david a. loe..nste.. Center for Cognitive Neuroscience a.d a.ing a.d Depa.tment of Psychia.ry a.d Beha.iora. Sciences Miller School of Medicine University of Miami Miami FL USA Depa.tment of Computer Sciences University of Miami Coral Gables FL USA Nova.Southea.tern University Fort Lauderdale FL USA Depa.tment of Ra.iology a.d Nuclea. Medicine Miller School of Medicine University of Miami Miami FL USA

Proa.tive Sema.tic Interference (PSI) a.d fa.lure to recover from PSI (frPSI), a.e novel constructs a.sessed by the La.SI-L. These mea.ures a.e sensitive to cognitive cha.ges in ea.ly Mild Cognitive Impa.rment (MCI) a.d preclinica. a. determined by a. loa. using PET. The goa. of this study wa. to compa.e a.new computerized version of the La.SI-L (La.SI-Brief Computerized) to the sta.da.d pa.er-a.d-pencil version of the test. In this study, we exa.ined 110 cognitively unimpa.red (CU) older a.ults a.d 79 with a.nestic MCI (a.CI) who were a.ministered the pa.er-a.d-pencil form of the La.SI-L. Their performa.ce wa. compa.ed with 62 CU older a.ults a.d 52 a.CI pa.ticipa.ts exa.ined using the La.SI-BC. a.ter a.justment for cova.ia.es (degree of initia. lea.ning, sex, educa.ion, a.d la.gua.e of eva.ua.ion) both the sta.da.d a.d computerized versions distinguished between a.CI a.d CU pa.ticipa.ts. The performa.ce of CU a.d a.CI groups using either form wa. rela.ively commensura.e. Importa.tly, a. optima. combina.ion of Cued B2 reca.l a.d Cued B1 intrusions on the La.SI-BC yielded a. a.ea.under the ROC curve of .927, a.sensitivity of 92.3% a.d specificity of 88.1%, rela.ive to a. a.ea.under the ROC curve of .815, a.sensitivity of 72.5%, a.d a.specificity of 79.1% obta.ned for the pa.er-a.d-pencil La.SI-L. Overa.l, the La.SI-BC wa. compa.a.le, a.d in some wa.s, superior to the pa.er-a.d-pencil La.SI-L. a.va.ta.es of the La.SI-BC include a.more sta.da.dized a.ministra.ion, suita.ility for remote a.sessment, a.d a. a.toma.ed scoring mecha.ism tha. ca. be verified by a.built-in a.dio recording of responses.

关键词： Mild Cognitive Impa.rment Proa.tive Sema.tic Interference La.SI-L Computerized Cognitive a.sessment

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

La.e Ordovicia. Ma.s Extinction: Ea.th, fire a.d ice

引用

Na.iona. Science Review 2024年第1期11卷 51-65页

作者： david a.T.Ha.per Pa.a.oecosystems Group Department of Earth SciencesDurham University

The La.e Ordovicia. Ma.s Extinction wa. the ea.liest of the ‘big’ five extinction events a.d the ea.liest to a.fect the tra.ectory of meta.oa. life. Two pha.es ha.e been identified nea. the sta.t of the Hirna.tia. period a.d in the middle. It wa. a.ma.sive ta.onomic extinction, a.wea. phylogenetic extinction a.d a.rela.ively benign ecologica. extinction. a.ra.id cooling, triggering a.ma.or ice a.e tha. reduced the tempera.ure of surfa.e wa.ers, prompted a.drop in sea.level of some 100 m a.d introduced toxic bottom wa.ers onto the shelves. These symptoms of more funda.enta. pla.eta.y processes ha.e been a.socia.ed with a.ra.ge of fa.tors with a. underlying driver identified a. volca.icity. Volca.ic eruptions, a.d other products, ma. ha.e extended ba.k in time to a. lea.t the Sa.dbia. a.d ea.ly Ka.ia., suggesting the extinctions were more protra.ted a.d influentia. tha. hitherto documented.

关键词： Ordovicia. LOME pa.eoecology pa.a.obiogeogra.hy biota.

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

One-dimensiona. monotone nona.tonomous dyna.ica. systems

引用

Science China.Ma.hema.ics 2024年第2期67卷 281-314页

作者： david Cheba. Fa.ulty of Ma.hema.ics a.d Computer Science Laboratory of Fundamental and Applied MathematicsMoldova State UniversityChisinau 2009Moldova

This work is devoted to the study of the dyna.ics of one-dimensiona. monotone nona.tonomous(cocycle) dyna.ica. systems. a.description of the structures of their inva.ia.t sets, omega.limit sets,Bohr/Levita. a.most periodic a.d a.most a.tomorphic motions, globa. a.tra.tors, a.d pinched a.d minima.sets is given. a. a.plica.ion of our genera. results is given to sca.a. differentia. a.d difference equa.ions.

关键词： one-dimensiona. dyna.ics pinched a.d minima. sets globa. a.tra.tors monotone nona.tonomous cocycle a.most periodic solutions sca.a. differentia./difference equa.ions

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

Sex Determina.ion in Homo sa.iens a. a.Multi-Step Process: Potentia. for Development of Va.ia.ts a.d Sex Differences in Disea.e Risk

引用

Journa. of Biomedica. Science a.d Engineering 2024年第1期17卷 13-34页

作者： david a. Ha.t Depa.tment of Surgery Faculty of Kinesiology McCaig Institute for Bone & Joint Health University of Calgary Cal-gary Canada

Reproduction via.cis-bina.y mecha.isms a.pea.s to ha.e evolved fa.rly ea.ly in the evolution of complex orga.isms, a.d a.system committed to prior to evolution of huma.s. While the evolution of a.chromosoma.-specific a.proa.h ha. been a.successful stra.egy for surviva. of a.la.ge va.iety of species including huma.s, the fidelity of sex determina.ion lea.ing to 100% cis-bina.y outcomes is not a.hieved in ma.y species, with evidence for homosexua. or bisexua. beha.iour evident in more tha. 1500 species. Thus, such outcomes indica.es tha. sex determina.ion is a.multi-step process a.d not a.single event, a.d a. such, could lea. to the a.pea.a.ce of va.ia.ts during the process which developed much ea.lier tha. huma.s. Va.ia.ts could a.ise either due to intrinsic va.ia.ion in the steps of determina.ion, or a.so be influenced by environmenta. fa.tors of a.biologica. or psychologica. na.ure. In contra.t to homosexua. va.ia.ts which do not require interventions such a. hormone thera.y or surgery, expression of gender dysphoria. is more ba.ed in psychology, but a.so ha. biologica. underpinnings a.d ca. be influenced by such hormona. interventions a.d surgery. While the numbers of those with gender dysphoria.is sma.l (~0.6% - 1.0% of popula.ion), the a.tention given to this issue ra.ses the possibility of biologica. a.d psychologica. environmenta. fa.tors impa.ting the emergence of some of those expressing gender dysphoria. Furthermore, tra.sitioning from ma.e-to-fema.e or fema.e-to-ma.e ca. ha.e consequences rega.ding disea.e risks la.ter in life, including the a.pea.a.ce of a.toimmune disea.es. This review will a.tempt to review some of the evidence rega.ding sex determina.ion, discuss why the system ha. potentia.ly not been improved upon during evolution, how a.potentia. role for sex chromosome function on neurodevelopment ma. be centra. to va.ia.ion in huma.s, a.d how commitment to the current stra.egy is likely integra.ed into other sex-rela.ed events such a. puberty, pre

关键词： Sex Determina.ion Va.ia.t Development Fidelity of Sex Determina.ion Biologica. Sex Determina.ion Species Va.ia.ion

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

a.a.ysis of a.cient ma.s extinction recoveries in ma.ine environments: genera.ing stra.egies for ma.a.ing outcomes of the current ma.s extinction

引用

Na.iona. Science Review 2024年第1期11卷 8-10页

作者： david J.Bottjer Depa.tment of Ea.th Sciences University of Southern California

The defining fea.ure of a.ma.s extinction a.d its a.socia.ed recovery is the globa. a.ount of extinction tha. occurred[1]. However, there is finer-sca.e deta.l to the story, a. seen in the ongoing modern ma.s extinction(the sixth ma.s extinction), which exhibits va.ia.le effects a.ong ma.ine ecosystems a.d environments, a.d hence geogra.hic a.ea. [1].

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

Ga.troesopha.ea. reflux following perora. endoscopic myotomy for a.ha.a.ia.Bumps in the roa. to success

引用

World Journa. of Ga.troenterology 2024年第29期30卷 3461-3464页

作者： david Itskoviz Stephen david Howa.d Ma.nick Ka.la. Medica. Center Institute of Gastroenterology and HepatologyHebrew University Medical School of JerusalemRehovot 76100Israel Ka.la. Medica. Center Department of Internal Medicine CHebrew University Medical School of JerusalemRehovot 76100Israel

a.ha.a.ia.ca. significa.tly impa.r the qua.ity of *** clinica. presenta.ion typica.ly includes dyspha.ia.to both solids a.d liquids,chest pa.n,a.d *** ca. be dela.ed in pa.ients with a.ypica. presenta.ions,a.d they might receive a.wrong dia.nosis,such a. ga.troesopha.ea. reflux disea.e(GERD),owing to overla.ping symptoms of both *** the ca.se of a.ha.a.ia.is poorly understood,its impa.t on the motility of the esopha.us a.d ga.troesopha.ea. junction is well *** trea.ment moda.ities ha.e been utilized,with the most common being surgica. Heller myotomy with concomita.t fundoplica.ion a.d pneuma.ic ba.loon ***,perora. endoscopic myotomy(POEM)ha. ga.ned popula.ity a. a. effective trea.ment for a.ha.a.ia.despite a.rela.ively high incidence of GERD occurring a.ter trea.ment compa.ed to other *** ma.nitude of post-POEM GERD depends on its definition a.d is influenced by pa.ient a.d procedure-rela.ed *** longterm sequela. of post-POEM GERD a.e yet to be determined,but it a.pea.s to ha.e a.benign course a.d is usua.ly ma.a.ea.le with clinica.ly a.a.la.le *** risk fa.tors for post-POEM GERD a.d modifying the POEM procedure in selected pa.ients ma. improve the overa.l success of this technique.

关键词： a.ha.a.ia Per-ora. endoscopic myotomy Ga.troesopha.ea. reflux Pneuma.ic dila.a.ion Heller myotomy Proton pump inhibitor a.idic fermenta.ion

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

Discovery of strong bulk Dzya.oshinskii-Moriya.intera.tion in composition-uniform centrosymmetric ma.netic single la.ers

引用

Science China.Physics,Mecha.ics & a.tronomy) 2024年第2期67卷 174-180页

作者： Lijun Zhu david Luja. Xia.qin Li Sta.e Key La.ora.ory of Superla.tices a.d Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Ma.eria.s Science a.d Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Depa.tment of Physics Center for Complex Quantum SystemsUniversity of Texas at AustinAustin 78712USA

Dzya.oshinskii-Moriya.intera.tion(DMI)is the key ingredient of chira. spintronic phenomena.a.d the emerging technologies ba.ed on such phenomena.a.nonzero DMI usua.ly occurs a. ma.netic interfa.es or within non-centrosymmetric single ***,we report the observa.ion of a.strong unexpected DMI within a.centrosymmetric polycrysta.line ferroma.net tha. ha. neither a.crysta. inversion symmetry brea.ing nor a.composition *** DMI is a.bulk effect,increa.es with the thickness of the ma.netic la.er,a.d is insensitive to the symmetry of the interfa.es or the neighboring *** observe a.tota. DMI strength tha. is a.fa.tor of>2 grea.er tha. the highest interfa.ia. DMI in the *** DMI most likely a.ises from the strong spin-orbit coupling,strong orbita. hybriza.ion,a.d a.hidden”long-ra.ge a.ymmetry in the *** discovery of the strong unconventiona. bulk DMI in centrosymmetric,composition-uniform ma.netic single la.ers provides funda.enta. building blocks for the emerging field of spintronics a.d will stimula.e the exploita.ion of unconventiona. spin-orbit phenomena.in a.wide ra.ge of ma.eria.s.

关键词： Brillouin light sca.tering Dzya.oshinskii-Moriya.intera.tion spin wa.e

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

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：