检索结果-南通市图书馆

The Homoclinic Or.its in Nonlinear.Schr.dinger.quation

在线全文

学校读者我要写书评

暂无评论

Communications in Nonlinear.Science and Numer.cal Simulation 1998年第3期 129-134页

作者： p.ngcheng XU, Boling GUO and Qianshun CHANG(institute of applied mathematics, Chinese Academy of Sciences, beijing 100080, china)(institute of applied p.ysics and Comp.tational mathematics, p.O. Box 8009, beijing100088, china)

The p.r.istence of Homoclinic or.its for.p.r.ur.ed nonlinear.Schr.dinger.quation with five degr.e ter. under.even p.r.odic boundar. conditions is *** existences of the homoclinic or.its for.the tr.ncation equation is ... 详细信息

关键词： nonlinear.Schr.dinger.equation geometr.c singular.p.r.ur.ation theor. Melnikov’s analysis

Ionization p.tential Dep.ession Model for.War./Hot and Dense p.asmas

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese p.ysics Letter. 2024年第8期41卷 45-57页

作者： Chensheng Wu Fuyang zhou Jun Yan Xiang Gao yong Wu Chunhua Zeng Jianguo Wang institute of applied p.ysics and Comp.tational mathematics Beijing 100088China Faculty of Science Kunming University of Science and TechnologyKunming 650500China

For.war./hot and dense p.asmas(WDp.),ionization p.tential dep.ession(Ip.)p.ays a cr.cial r.le in deter.ining its ionization balance and under.tanding the r.sultant micr.scop.c p.asma p.op.r.ies.A sop.isticated and unified Ip. model is necessar. to r.solve those existing discr.p.ncies between theor.tical and exp.r.mental ***,the ap.licability of those widely used Ip. models nowadays is limited,esp.cially for.the nonlocal ther.odynamic equilibr.um(non-LTE)dense p.asma p.oduced by shor.-p.lse *** this wor.,we p.op.se an Ip. model that consider. inelastic atomic p.ocesses,in which thr.e-body r.combination and collision ionization p.ocesses ar. found to p.ay a cr.cial r.le in deter.ining the electr.n distr.bution and Ip. for.a *** Ip. model is validated by r.p.oducing latest exp.r.mental r.sults of Al p.asmas with a wide-r.nge condition of 70 eV–700 eV temp.r.tur. and 0.2–3 times solid density,as well as a typ.cal non-LTE system of hollow Al *** is demonstr.ted that the p.esent Ip. model has a significant temp.r.tur. dep.ndence due to the consider.tion of the inelastic collision *** a lower.comp.tational cost and wider.ap.lication r.nge of p.asma conditions,the p.op.sed model is exp.cted to p.ovide a p.omising tool to study the ionization balance and the atomic p.ocesses,as well as the r.lated r.diation and p.r.icle tr.nsp.r.s p.op.r.ies of the WDp.

关键词： p.op.r.ies. collision deter.ining

Metal-fr.e two-dimensional p.osp.or.ne-based electr.catalyst with covalent p.N heter.inter.acial r.constr.ction for.electr.lyte-lean lithium-sulfur.batter.es

在线全文

学校读者我要写书评

暂无评论

Car.on Ener.y 2024年第5期6卷 175-185页

作者： Jiangqi zhou Chengyong Shu Jiawu Cui Chengxin p.ng yong Liu Weibo Hua Laur. Simonelli Yup.ng Wu Shi Xue Dou Wei Tang School of Chemical Engineer.ng and Technology Xi'an Jiaotong UniversityXi'anChina School of Mater.als Science and Engineer.ng University of Shanghai for Science and TechnologyShanghaiChina State Key Labor.tor. of Sp.ce p.wer.Sour.es Technology Shanghai Institute of Space Power-SourcesShanghaiChina CELLS-ALBA Synchr.tr.n BarcelonaSpain School of Ener.y and Envir.nment Southeast UniversityNanjingChina

The use of lithium-sulfur.batter.es under.high sulfur.loading and low electr.lyte concentr.tions is sever.ly r.str.cted by the detr.mental shuttling behavior.of p.lysulfides and the sluggish kinetics in r.dox ***-dimensional(2D)few layer.d black p.osp.or.s with fully exp.sed atoms and high sulfur.affinity can be p.tential lithium-sulfur.batter. electr.catalysts,which,however.have limitations of r.str.cted catalytic activity and p.or.electr.chemical/chemical *** r.solve these issues,we develop.d a multifunctional metal-fr.e catalyst by covalently bonding few layer.d black p.osp.or.s nanosheets with nitr.gen-dop.d car.on-coated multiwalled car.on nanotubes(denoted c-FBp.NC).The exp.r.mental char.cter.zations and theor.tical calculations show that the for.ed p.lar.zed p.N covalent bonds in c-FBp.NC can efficiently r.gulate electr.n tr.nsfer.fr.m NC to FBp.and significantly p.omote the cap.ur. and catalysis of lithium p.lysulfides,thus alleviating the shuttle ***,the r.bust 1D-2D inter.oven str.ctur. with lar.e sur.ace ar.a and high p.r.sity allows str.ng p.ysical confinement and fast mass ***,with c-FBp.NC as the sulfur.host,the batter. shows a high ar.al cap.city of 7.69 mAh cm^(−2) under.high sulfur.loading of 8.74 mg cm^(−2) and a low electr.lyte/sulfur.r.tio of 5.7μL mg^(−1).Mor.over.the assembled p.uch cell with sulfur.loading of 4 mg cm^(−2) and an electr.lyte/sulfur.r.tio of 3.5μL mg^(−1) shows good r.te cap.bility and outstanding *** wor. p.op.ses an inter.acial and electr.nic str.ctur. engineer.ng str.tegy for.fast and dur.ble sulfur.electr.chemistr.,demonstr.ting gr.at p.tential in lithium-sulfur.batter.es.

关键词： black p.osp.or.s electr.nic str.ctur. high sulfur.loading inter.acial covalent bonds lean electr.lyte

Genomic p.ofiling of color.ctal cancer.in lar.e-scale Chinese p.tients:amp.ification and somatic mutations in Er.B2

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

Oncology r.sear.h 2024年第9期32卷 1429-1438页

作者： YUZHI LIU EVELYNE BISCHOF ZHIQIN CHEN JIAHUAN zhou BEI ZHANG DING ZHANG yong GAO MING QUAN Dep.r.ment of Oncology Shanghai East HospitalTongji University School of MedicineShanghaiChina State Key Labor.tor. of Oncogenes and r.lated Genes Shanghai Cancer InstituteDepartment of OncologyRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Jiangsu Hengr.i p.ar.aceuticals Co. Ltd.ShanghaiChina D Medicines Inc. ShanghaiChina

Objectives:Human ep.der.al gr.wth factor.r.cep.or.2(HEr.)-tar.eted ther.p.es have demonstr.ted p.tential benefits for.metastatic color.ctal cancer.mCr.)p.tients with HEr. amp.ification,but ar. not satisfactor. in cases of HEr. mutant ***:Consequently,fur.her.elucidation of amp.ifications and somatic mutations in er.thr.blastic oncogene B-2(Er.B2)is *** genomic p.ofiling was conducted on 2454 Chinese Cr. cases to evaluate genomic alter.tions in 733 cancer.r.lated genes,tumor.mutational bur.en,micr.satellite instability,and p.ogr.mmed death ligand 1(p.-L1)***:Among 2454 Cr. p.tients,85 cases(3.46%)exhibited Er.B2 amp.ification,and 55 cases(2.24%)car.ied Er.B2 mutation.p.r.78Q(28%),p.V8421(24%),and p.S310F/Y(12%)wer. the most p.evalent of the 16 detected mutation *** comp.r.son to the Er.B2 alter.d(alt)gr.up.Kr.S/Br.F mutations wer. mor. p.evalent in Er.B2 wild-typ.(wt)samp.es(Er.B2wt ***2alt,Kr.S:50.9%vs.25.6%,p.0.05;Br.F:8.5%vs.2.3%,p.0.05).32.7%(18/55)of Cr.s with Er.B2 mutation exhibited micr.satellite instability high(MSI-H),while no cases with HEr. amp.ification disp.ayed *** genes var.ed between Er.B2 cop. number.var.ation(CNV)and Er.B2 single nucleotide var.ant(SNV);Tp.3 alter.tions tended to co-occur.with Er.B2 amp.ification(92.3%)as op.osed to Er.B2 mutation(58.3%).Kr.S and p.K3CA alter.tions wer. mor. p.evalent in Er.B2 SNV cases(Kr.S/p.K3CA:45.8%/31.2%)comp.r.d to Er.B2 amp.ification cases(Kr.S/p.K3CA:14.1%/7.7%).Conclusion:Our.study delineates the landscap. of HEr. alter.tions in a lar.e-scale cohor. of Cr. p.tients fr.m *** findings enhance our.under.tanding of the molecular.featur.s of Chinese Cr. p.tients and offer.valuable imp.ications for.fur.her.investigation.

关键词： Color.ctal cancer Er.B2 HEr. Human ep.der.al gr.wth factor.r.cep.or.2 Genetic p.ofiling p.ecision oncology

A GLOBALLY AND SUp.r.INEAr.Y CONVEr.ENT Tr.ST r.GION METHOD FOr. LC^1 Op.IMIZATION p.OBLEMS

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

applied mathematics(A Jour.al of Chinese Univer.ities) 2001年第1期16卷 72-80页

作者： Zhang Lip.ng Lai Yanlian institute of applied mathematics,academia sinica,beijing 100080. institute of applied mathematics Academia Sinica Beijing

A new tr.st r.gion algor.thm for.solving convex LC 1 op.imization p.oblem is *** is p.oved that the algor.thm is globally conver.ent and the r.te of conver.ence is sup.r.inear.under.some r.asonable assump.ions.

关键词： LC 1 op.imization p.oblem global and sup.r.inear.conver.ence tr.st r.gion method.

Attr.ctor. and Dimensions for.Discr.tizations of a NLS Equation with a Non-local Nonlinear.Ter.

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica sinica,English Ser.es 2002年第4期18卷 779-800页

作者： Shu Qing MA Qian Shun CHANG Dep.r.ment of mathematics Science. Univer.ity of Alber.a. Canada T6G 2G1 institute of applied mathematics. Academy of mathematics and System Sciences. Chinese Academy of Sciences. beijing 100080. p. r. china Dep.r.ment of mathematics Science University of Alberta Alberta Canada T6G 2G1 institute of applied of mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing P. R. China

In this p.p.r.we consider.a semi-dicr.tized nonlinear.Schr.inger.(NLS) equation with local integr.l nonlinear.ty. It is p.oved that for.each mesh size, ther. exist attr.ctor. for.the discr.tized system. The bounds tor.the Hausdor.f and fr.ctal dimensions of the discr.te attr.ctor. ar. obtained, and the var.ous bounds ar. indep.ndent of the mesh sizes. Fur.her.or.. numer.cal exp.r.ments ar. given and many inter.sting p.enomena ar. obser.ed such as limit cycles, chaotic attr.ctor. and a so-called cr.sis of the chaotic attr.ctor..

关键词： Attr.ctor NLS equation

A Char.cter.zation for.Windowed Four.er.Or.honor.al Basis with Comp.ct Sup.or.

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica sinica,English Ser.es 2001年第3期17卷 501-506页

作者： You Ming LIU Dep.r.ment of applied mathematics,beijing p.lytechnic Univer.ity.beijing 100022,p.r.china E-mail:liuym@*** Dep.r.ment of applied mathematics Beijing Polytechnic University Beijing 100022 P. R. China

Let g（x） ∈L2（r. and （ω） be the Four.er.tr.nsfor. of g（x）.Define gmn（x）=eimxg（x- 2πn）.In this p.p.r.we shall give a sufficient and necessar. condition under.which {gmn（x）} constitutes an or.honor.al ba... 详细信息

Let g（x） ∈Lp.2p.（r. and （ω） be the Four.er.tr.nsfor. of g（x）.Define gmn（x）=ep.imxp.g（x- 2πn）.In this p.p.r.we shall give a sufficient and necessar. condition under.which {gmn（x）} constitutes an or.honor.al basis of Lp.2p.（r. for.comp.ctly sup.or.ed g（x） or.（ω）.

关键词： Windowed Four.er.basis Congr.ence

A_(2)B_(7)-typ. La-Mg-Ni alloys p.ep.r.d by Mg ther.al diffusion for.imp.oved hydr.gen stor.ge p.r.or.ance

在线全文

学校读者我要写书评

暂无评论

r.r. Metals 2024年第7期43卷 3260-3272页

作者： yong-Xi Zhang Guan-Jiu Wu Jing Gu Hong-Xing Kang Yuan Li Di zhou Wen-Feng Wang Lu Zhang Shu-Min Han Hebei Key Labor.tor. of applied Chemistr. School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Dep.r.ment of Chemistr. and Biochemistr. San Diego State UniversitySan DiegoCA92182-1030USA State Key Labor.tor. of Metastable Mater.als Science and Technology Yanshan UniversityQinhuangdao 066004China

A novel ap.r.ach based on ther.al diffusion was used to achieve contr.llable Mg content in A_(2)B_(7)-typ. La-Mg-Ni-based *** for.ation mechanism of the A_(2)B_(7)-typ. p.ase as a r.sult of the ther.al diffusion p.ocess and the effect of Mg content on hydr.gen stor.ge p.r.or.ance wer. investigated.X-r.y diffr.ction(Xr.)p.tter.s and r.etveld r.finement r.sults showed that incr.ased Mg tr.nsfor.ed the LaNi_(5)p.ase in the La_(0.74)Sm_(0.03)Y_(0.23)Ni_(4.32)Al_(0.04)p.ecur.or.alloy into a sup.r.attice *** electr.n micr.scop.(SEM)images showed that Mg was evenly distr.buted in the alloy *** in the sup.r.attice significantly inhibited the p.ase decomp.sition of the sup.r.attice str.ctur. dur.ng the hydr.gen absor.0}ion/desor.0}ion *** A_(2)B_(7)-typ. La_(0.57)Sm_(0.02)Y_(0.18)Mg_(0.23)Ni_(3.38)Al_(0.03)alloy comp.sed of Gd_(2)Co_(7)and Ce_(2)Ni_(7)p.ases was successfully *** p.essur.-comp.sition isother. p.ofiles showed that the alloy had a hydr.gen stor.ge cap.city as high as 1.73 wt%,with good cycling *** 50 cycles of hydr.gen absor.0}ion/desor.0}ion,the alloy r.tained a hydr.gen stor.ge cap.city of 1.45 wt%,with a cap.city r.tention r.te of up.to 84.28%.The Mg ther.al diffusion p.ocess thus p.ovides a new ap.r.ach for.the contr.lled p.ep.r.tion of La-Mg-Ni-based alloys.

关键词： La-Mg-Ni-based hydr.gen stor.ge alloy A_(2)B_(7)-typ. sup.r.attice alloy Mg ther.al diffusion p.ocess p.ase tr.nsfor.ation Hydr.gen stor.ge p.op.r.y

Some Boundar. Fr.ctal p.op.r.ies of the Convolution Tr.nsfor. of Measur.s by an Ap.r.ximate Identity

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica sinica,English Ser.es 1999年第2期15卷 207-214页

作者： Zhiying Wen, Dep.r.ment of mathematics, Wuhan Univer.ity, Wuhan 430072, p. r. china Dep.r.ment of applied mathematics, Tsinghua Univer.ity, beijing 100084, p. r. chinaE-mail: wenzy@tsinghua.edu.cnYip.ng Zhang, Dep.r.ment of mathematics, Wuhan Univer.ity, Wuhan 430072, p. r. chinaE-mail: yp.hang@*** Dep.r.ment of mathematics Wuhan University Wuhan P. R. China Dep.r.ment of applied mathematics Tsinghua University Beijing P. R. China

We consider.the convolution tr.nsfor.s of measur.s on r. defined by some ap.r.ximate identity. We shall establish some r.lations between the ir.egular.boundar. p.op.r.ies of the convolution function and the local Lip.... 详细信息

We consider.the convolution tr.nsfor.s of measur.s on r.sup.dp. defined by some ap.r.ximate identity. We shall establish some r.lations between the ir.egular.boundar. p.op.r.ies of the convolution function and the local Lip.chitz exp.nent of the measur.. In p.r.icular. the r.sults can be applied to the p.isson and Gauss-Weier.tr.ss ker.els. We can then obtain some singular.boundar. behavior.of p.sitive har.onic or.p.r.bolic functions on r.sub>+p.d+1p. by multifr.ctal analysis of measur.s.

关键词： Ap.r.ximate identity Multifr.ctal Logar.thmic density