检索结果-南通市图书馆

On Integrable Properties for Two Variable-Coefficient Evolution Equations

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2013年第6期59卷 671-678页

作者： ZHANG yu-Feng HAN Zhong Honwah tam College of Sciences China University of Mining and Technology Xuzhou 221116 China Department of Computer Science Hong Kong Baptist University Hong Kong China

With the help of the extended binary Bell polynomials, the new bilinear representations, Backlund trans- formations, Lax pair and infinite conservation laws for two types of variable-coefficient nonlinear integrable equations are obtained, respectively, which are more straightforward than previous corresponding results obtained. Finally, we obtain new multi-soliton wave solutions of a reduced soliton equations with variable coefficients.

关键词： Bell polynomials Backlund transformation conservation laws

Lie Algebras Associated with Group U（n）

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第2X期48卷 215-226页

作者： ZHANG yu-Feng DONG Huang-He Honwah tam Mathematical School Liaoning Normal University Dalian 116029 China School of Information and Science Engineering Shandong University of Science and Technology Qingdao 266510 China Department of Computer Science Hong Kong Baptist University Hong Kong China

Starting from the subgroups of the group U（n）, the corresponding Lie algebras of the Lie algebra Al are presented, from which two well-known simple equivalent matrix Lie algebras are given. It follows that a few expanding Lie algebras are obtained by enlarging matrices. Some of them can be devoted to producing double integrable couplings of the soliton hierarchies of nonlinear evolution equations. Others can be used to generate integrable couplings involving more potential functions. The above Lie algebras are classified into two types. Only one type can generate the integrable couplings, whose Hamiltonian structure could be obtained by use of the quadratic-form identity. In addition, one condition on searching for integrable couplings is improved such that more useful Lie algebras are enlightened to engender. Then two explicit examples are shown to illustrate the applications of the Lie algebras. Finally, with the help of closed cycling operation relations, another way of producing higher-dimensional Lie algebras is given.

关键词： Lie algebra group integrable couplings

Higher-Dimensional KdV Equations and Their Soliton Solutions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第3期45卷 411-413页

作者： ZHANG yu-Feng tam Honwah ZHAO Jing School of Mathematics Liaoning Normal University Dalian 116029 China Department of Computer Sciences Hong Kong Baptist University Hong Kong China Information School Dalian University Dalian 116622 China

A （2＋1）-dimensional KdV equation is obtained by use of Hirota method, which possesses N-soliton solution, specially its exact two-soliton solution is presented. By employing a proper algebraic transformation and the Riccati equation, a type of hell-shape soliton solutions are produced via regarding the variable in the Riccati equation as the independent variable. Finally, we extend the above （2＋1）-dimensional KdV equation into （3＋1）-dimensional equation, the two-soliton solutions are given.

关键词： bilinear operator KdV equation soliton equation

Polymeric micelle nanocarriers in cancer research

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2016年第3期10卷 348-359页

作者： Dae Hwan Shin yu Tong tam Glen S. Kwon School of Pharmacy University of Wisconsin Madison WI 53705 USA

Amphiphilic block copolymers （ABCs） assem- ble into a spherical nanoscopic supramolecular core/shell nanostructure termed a polymeric micelle that has been widely researched as an injectable nanocarrier for poorly water-soluble anticancer agents. The aim of this review article is to update progress in the field of drug delivery towards clinical trials, highlighting advances in polymeric micelles used for drug solubilization, reduced off-target toxicity and tumor targeting by the enhanced permeability and retention （EPR） effect. Polymeric micelles vary in stability in blood and drug release rate, and accordingly play different but key roles in drug delivery. For intravenous （IV） infusion, polymeric micelles that disas- semble in blood and rapidly release poorly water-soluble anticancer agent such as paclitaxel have been used for drug solubilization, safety and the distinct possibility of toxicity reduction relative to existing solubilizing agents, e.g., Cremophor EL. Stable polymeric micelles are long- circulating in blood and reduce distribution to non-target tissue, lowering off-target toxicity. Further, they participate in the EPR effect in murine tumor models. In summary, polymeric micelles act as injectable nanocarriers for poorly water-soluble anticancer agents, achieving reduced toxi- city and targeting tumors by the EPR effect.

关键词： nanomedicine parenteral poly(ethylene glycol) poly(lactic acid) reformulation

Peptide asparaginyl ligases——renegade peptide bond makers

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第3期63卷 296-307页

作者： James P.tam Ning-yu Chan Heng Tai Liew Shaun J.Tan yu Chen School of Biological Sciences Nanyang Technological UniversitySingapore 637551Singapore Synzymes and Natural Products Center Nanyang Technological UniversitySingapore 637551Singapore NTU Institute of Structural Biology Nanyang Technological UniversitySingapore 636921Singapore

Making peptide bonds is tightly controlled by genetic code and machinery which includes cofactors,ATP,and *** this regard,the stand-alone and genetic-code-independent peptide ligases constitute a new family of renegade peptide-bond makers.A prime example is butelase-1,an Asn/Asp(Asx)-specific ligase that structurally belongs to the asparaginyl endopeptidase ***-1 specifically recognizes a C-terminal Asx-containing tripeptide motif,Asn/Asp-Xaa-Yaa(Xaa and Yaa are any amino acids),to form a site-specific Asn-Xaa peptide bond either intramolecularly as cyclic proteins or intermolecularly as modified *** work in the past five years has validated that butelase-1 is a potent and versatile *** we review the advances in ligases,with a focus on butelase-1,and their applications in engineering bioactive peptides and precision protein modifications,antibody-drug conjugates,and live-cell labeling.

关键词： asparaginyl endopeptidase Asn-specific ligation bioorthogonal ligation butelase chemoenzymatic ligation live-cell labeling protein engineering protein modification site-specific labeling tandem ligation

Versatile sensing devices for self-driven designated therapy based on robust breathable composite films

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第2期15卷 1027-1038页

作者： Zhaofeng Ouyang Songbo Cui Houyong yu Dewen Xu Chuang Wang Dongping Tang Kam Chiu tam Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of EducationSchool of Materials Science and EngineeringZhejiang Sci-Tech UniversityHangzhou 310018China Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooON N2L 3G1Canada

Flexible wearable electronics were developed for applications such as electronic skins,human-machine interactions,healthcare monitoring,and anti-infection *** conventional materials showed impermeability,single sensing ability,and no designated therapy,which hindered their *** it was still a great challenge to develop electronic devices with multifunctional sensing properties and self-driven anti-infection ***,flexible and breathable on-skin electronic devices for multifunctional fabric based sensing and self-driven designated anti-infection therapy were prepared successfully with cellulose nanocrystals/iron(Ⅲ)ion/polyvinyl alcohol(CNC/Fe^(3+)/PVA)*** resultant composite films possessed robust mechanical performances,outstanding conductivity,and distinguished breathability(3.03 kg/(m^(2)·d)),which benefited from the multiple interactions of weak hydrogen bonds and Fe^(3+) chelation and synergistic effects among CNC,polyaniline(PANI),and ***,the film could be assembled as a multifunctional sensor to actively monitor real-time physical and infection related signals such as temperature,moisture,pH,NH3,and human movements even at sweat *** importantly,this multifunctional device could act as a self-driven therapist to eliminate bacterial by the release of Fe^(3+),which was driven by the damage of metal coordination Fe-O bonds due to the high temperature caused by infection at wound ***,the composite films had potential versatile applications in electronic skins,smart wound dressings,human-machine interactions,and self-driven anti-infection therapy.

关键词： cellulose nanocrystals polyvinyl alcohol composite films mechanical performances

*** acknowledges the financial support from the Engineering and Physical Sciences Research Council(***/L022559/1,EP/L022559/2,EP/V050311/1,and EP/W004399/1);Royal Society(***130230 and IE161214);H2020 Marie Skłodowska-Curie Actions(No.790666);*** supported by a PhD Studentship provided by Queen Mary University of London and China Scholarship Council(CSC).

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

Nano Research 2022年第8期15卷 7432-7452页

作者： Lumin Chen Somia Yassin Hussain Abdalkarim Houyong yu Xiang Chen Dongping Tang Yingzhan Li Kam Chiu tam The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1Canada

Advanced energy and sensor devices with novel applications(e.g.,mobile equipment,electric vehicles,and medical-healthcare systems)are one of the important foundations of modern intelligent ***,there are still some scientific issues that seriously hinder the further development of devices,including unsustainability,high material cost,complex fabrication process,safety issues,and unsatisfactory *** has aroused tremendous attention in recent decades,because of its abundant resources,renewability,degradability,low-cost,and unique physical/chemical *** merits make nanocellulose as matrix materials to fabricate advanced functional composites for use in energy-related fields extremely ***,we comprehensively discuss the recent progress of nanocellulose for emerging energy storage/harvesting and sensor *** preparation methodologies of nanocellulose combined with conductive materials are firstly highlighted,including carbon materials,conductive polymers,metal/metal oxide nanoparticles,metal-organic frameworks(MOFs),and covalent organic frameworks(COFs).We then focus on the nanocellulose-based advanced materials for the application in the areas of supercapacitors,lithium-ion batteries,solar cells,triboelectric nanogenerators,moisture-enabled electric generators,and ***,the future research directions of nanocellulose-based functional materials in energy-related devices are presented.

关键词： nanocellulose conductive composites supercapacitors lithium-ion batteries solar cells nanogenerators sensors

Characterizing the optimal operation of photocatalytic degradation of BDE-209 by nano-sized TiO_2

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

Journal of Environmental Sciences 2012年第9期24卷 1670-1678页

作者： Ka Lai Chow yu Bon Man Jin Shu Zheng Yan Liang Nora Fung Yee tam Ming Hung Wong Croucher Institute for Environmental Sciences and Department of Biology Hong Kong Baptist University Hong Kong SAR China Department of Biology and Chemistry City University of Hong Kong Hong Kong SAR China

Brominated flame retardants have been widely used in industry. There is a rapid growing public concern for their availabilities in the environment. Advanced oxidation process （AOP） is a promising and efficient technology which may be used to remove emerging chemicals such as brominated flame retardants. This study aims at investigating optimal operational conditions for the removal of BDE-209 using nano-scaled titanium（IV） oxide. The residual PBDE congeners after photocatalytical degradation of BDE-209 by TiO2 were analysed by gas chromatography-mass spectrometry （GC-MS）. It was found that the degradability of BDE-209 by TiO2 was attributed to its photocatalytic activity but not the small size of the particles. The half-life of removing BDE-209 by TiO2 was 3.05 days under visible light. Tetra- and penta-BDEs were the major degraded products of BDE-209. Optimum conditions for photocatalytical degradation of BDE-209 was found to be at pH 12 （93% ± 1%）, 5, 10, 20 mg/L （93.0% ± 1.70%, 91.6% ± 3.21%, 91.9% ± 0.952%, respectively）, respectively of humic acid and in the form of anatase/rutile TiO2 （82% ± 3%）. Hence, the efficiency of removing BDE-209 can be maximized while being cost effective at the said operating conditions.

关键词： PBDEs TiO2 photocatalysis hydroxyl radicals

Robust,Breathable and Flexible Smart Textiles as Multifunctional Sensor and Heater for Personal Health Management

在线全文

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2023年第1期5卷 282-295页

作者： Dewen Xu Zhaofeng Ouyang Yanjuan Dong Hou‑Yong yu Shuang Zheng Shenghong Li Kam Chiu tam Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province Zhejiang Sci-Tech UniversityXiasha Higher Education Park Avenue 2 No.928Hangzhou 310018China Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooON N2L 3G1Canada

Smart textiles with high sensitivity and rapid response for various external stimuli have gained tremendous attentions in human healthcare monitoring,personal heat management,and wearable ***,the current smart textiles only acquire desired signal passively,regularly lacking subsequent on-demand therapy ***,a robust,breathable,and flexible smart textiles as multi-function sensor and wearable heater for human health monitoring and gentle thermotherapy in real time is *** composite fiber as strain sensor(CFY@PU)was fabricated via warping carbon fiber yarns(CFY)onto polyurethane fibers(PU),which endowed composite fiber with high conductivity,excellent sensitivity(GF=76.2),and fantastic dynamic durability(7500 cycles)in strain *** addition,CFY@PU can detect various degrees of human movements such as elbow bending,swallowing and pulse,which can provide effective information for disease *** surprisingly,weaving CFY@PU into a fabric can assemble highly sensitive pressure sensor for remote communication and information *** CFY onto Kevlar would obtain temperature-sensitive composite fiber(CFY@Kevlar)as temperature sensor and wearable heater for on-demand thermotherapy,which provided unique opportunities in designing smart textiles with ultrahigh sensitivity,rapid response,and great dynamic durability.

关键词： Smart textiles Carbon fiber yarns Multifunctional sensor Personal heat management Wearable electronics