检索结果-南通市图书馆

A Theoretical Model for Characterizing the Internal Contact of the CICC Strands under Axial Strain

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2016年第5期29卷 455-467页

作者： Shuai Dong ze jing Huadong Yong Youhe Zhou Key Laboratory of Mechanics on Disaster and Environment in Western China The Ministry of Education of Chinaand Department of Mechanics and Engineering SciencesCollege of Civil Engineering and MechanicsLanzhou University School of Mechano-Electronic Engineering Xidian University

A theoretical model is proposed to calculate the internal contact distributions and contact forces of a 3×4×4×4 twisted NbSn cable under applied axial *** critical current density reduction of the whole cable can be *** thin rod theory is employed to analyze the mechanical behavior of each *** to the regular helical structure,the contact distribution of each strand is obtained,and the contact force in the cable is *** last,a prediction about the critical current density of the twisted cable is *** results show that decreasing the pitch length can reduce the contact forces between strands.

关键词： modulus cable strand length resultant decreasing pitch helical twisted radius

Delta distribution of electronegative plasma predicted by reformed“spring oscillator”dynamic equation with dispersing force

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第5期30卷 484-491页

作者： Shu-Xia Zhao jing-ze Li Key Laboratory of Materials Modification by laser Ion and Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

In our relevant paper[Zhao S X(2021)***.B 30055201],a delta distribution of negative ions is given by fluid simulation and preliminarily explained by decomposed anions transport *** the present work,first,the intrinsic connection between the electropositive plasma transport equation and spring oscillator dynamic equation is *** by this similarity,reformed“spring oscillator”equation with dispersing instead of restoring force that gives quasi-delta solution is devised according to the math embodied in the anion equation,which is of potential significance to the disciplines of atomic physics and astronomy as *** solving the“diffusion confusion”the physics that determines the delta profile within the continuity equation is explored on the basis that recombination loss source term plays the role of drift flux,which is applicable for fluid model of low temperature plasma,but not the ordinary fluid ***,the math and physics revealed in this work predict that the ratio of recombination or attachment(for electrons)frequency versus the species diffusion coefficient is a very important parameter in determining the delta distribution,as it acts as the acceleration of object,according to the reformed oscillator *** this theory,the analogous delta profile of electrons density in the famous drift and ambi-polar diffusion heating mechanism of electronegative capacitively coupled plasma is interpreted.

关键词： delta distribution electronegative plasma revised spring oscillator dispersing force

Diffusion in Fast-Ion Conductor Calcia-Stabilized Zirconia: a Molecular Dynamics Study

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第10期15卷 727-729页

作者： SUN jing-ze WANG Yu-ming Department of Materials Science Jilin UniversityChangchun 130023

Molecular dynamics simulation technique is used to investigate the ionic conduction property of the fast-ion conductor calcia-stabilized zirconia(CSZ).The theoretical results coincide with experimental measurements *** is suggested that the dopant cation distribution is a key factor controlling the ionic conduction property of the CSZ electrolytes,which can be used as a rule in the microstructure designing and controlling in material processing.

关键词： Molecular conduction controlling

Flux avalanche in thin superconducting film with internal crack

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

Science China(Physics,Mechanics & Astronomy) 2018年第9期61卷 103-106页

作者： YuRong Lu ze jing HuaDong Yong YouHe Zhou Key Laboratory of Mechanics on Disaster and Environment in Western China Ministry of Education of China Department of Mechanics and Engineering Sciences College of Civil Engineering and Mechanics Lanzhou University School of Mechano-Electronic Engineering Xidian University

When type-II superconductors are in external magnetic field,the magnetic flux would penetrate the superconductors in the form of flux vortex[1].If the superconductor is subjected to a local thermal disturbance,this ma... 详细信息

关键词：超导体流动雪崩电影外部磁场旋涡磁性

Identification of Colletotrichum spp. isolated from strawberry in Zhejiang Province and Shanghai City,China

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第1期11卷 61-70页

作者： Liu XIE jing-ze ZHANG Yao WAN Dong-wei HU Key Laboratory of Molecular Biology of Crop Pathogens and lnsects Ministry of Agriculture Institute of Bioteehnology College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 China

Strawberry anthracnose, caused by Colletotrichum spp., is a major disease of cultivated strawberry. This study identifies 31 isolates of Colletotrichum spp. which cause strawberry anthracnose in Zhejiang Province and Shanghai City, China. Eleven isolates were identified as C. acutatum, 10 as C. gloeosporioides and 10 as C. fragariae based on morphological characteristics, phylogenetic and sequence analyses. Species-specific polymerase chain reaction （PCR） and enzyme digestion further confirmed the identification of the Colletotrichum spp., demonstrating that these three species are currently the causal agents of strawberry anthracnose in the studied regions. Based on analysis of rDNA internal transcribed spacers （ITS） sequences, sequences of all C. acutatum were identical, and little genetic variability was observed between C. fragariae and C. gloeosporioides. However, the conservative nature of the Mvnl specific site from isolates of C. gloeosporioides was confirmed, and this site could be used to differentiate C. gloeosporioides from C. fragariae.

关键词： Fragariaxananassa Taxonomic identification Colletotrichum acutatum C. gloeosporioides C. fragariae

Interfacial phenomena of water striders on water surfaces: a review from biology to biomechanics

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2020年第3期41卷 231-246页

作者： jing-ze Ma Hong-Yu Lu Xiao-Song Li Yu Tian State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China

Water striders have intrigued researchers for centuries from the viewpoints of biology to biomechanics. In this review, we introduce the basic theories and techniques of physics and force measurement for biomechanical research into water striders. Morphological and behavioral traits of water striders are summarized and discussed from biomechanical perspectives, along with comparative study. This integrated review also highlights potential directions for studies on water-walking arthropods,which might inspire future biological and biomechanical research.

关键词： Water strider Water repellency Surface tension Surface propulsion

Liquid-phase Exfoliated WS2-Graphene Composite Anodes for Potassium-ion Batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2020年第3期39卷 493-499,378页

作者： WANG Wei BAO jing-ze SUN Chuan-Fu CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100190China

Tungsten disulfide(WS2) has been recognized as a promising anode material for rechargeable potassium-ion batteries(PIBs). However, its K-ion intercalation capacity is limited to ~60 mAh·g^(-1). Here, we report a WS2-graphene composite anode which is fabricated through simple filtration of liquid-phase exfoliated WS2 and graphene nanosheet delivers a significantly improved specific capacity of 137 mAh·g^(-1) at a current density of 10 mA·g^(-1). The composite anodes also exhibit remarkable rate capability and long-term cyclability over 500 cycles. These results highlight the WS2-graphene composite structure as a promising anode material for long lifespan rechargeable potassium-ion batteries.

关键词： tungsten disulfide liquid-phase exfoliation K-ion battery grapheme

Preparative separation and quantitative determination of two kaurenoic acid isomers in root barks ofAcanthopanax gracilistylus

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2017年第8期15卷 625-630页

作者： XIE Xin-Xin JIANG ze-jing CHENG Zhi-Hong CHEN Dao-Feng Department of Pharmacognosy School of PharmacyFudan UniversityShanghai 201203China

The kaurenoic acid-type diterpenoids in Acanthopanacis Cortex have been reported to be the major active components. However, the diterpenoids are present as position isomers that exacerbate the challenges in obtaining standards compounds. Little work has been done on the quantitative analysis of the diterpenoids in the herb. In the present study, two diterpenoid isomers ent-16βH,17-isovalerate-kauran-19-oic acid(1) and ent-16βH,17-methyl butanoate-kauran-19-oic acid(2) with high purity were separated by analytical HPLC, followed by recrystallization in acetone. Furthermore, an HPLC-ELSD method was developed and validated for simultaneous determination of 1 and 2 in 9 batches of Acanthopanacis Cortex samples. The HPLC separation and quantification was achieved in 40 min using an Agela Promosil C18 column eluted with a gradient of water and acetonitrile. The calibration curves showed good linearity(r^2 ≥ 0.999 9) within the test ranges. The LOD ranged from 0.407 2 to 0.518 0 mg and LOQ ranged from 1.018 0 to 1.295 0 mg. The precisions(%RSD) were within 1.47% for the two isomers. The recovery of the assay was in the range of 98.78%-99.11% with RSD values less than 2.76%. It is the first time to establish a quantitative HPLC method for the analysis of the bioactive kaurenoic acid isomers in the herb.

关键词： Acanthopanax gracilistylus Kaurenoic Acid Quantification HPLC-ELSD

Ultrastructure and phylogeny of Ustilago coicis

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第4期14卷 336-345页

作者： jing-ze ZHANG Pei-gang GUAN Gang TAO Mohammad Reza OJAGHIAN Kevin David HYDE Institute of Biotechnology College of Agriculture and BiotechnologyZhejiang University Guizhou Institute of Plant Protection Key Laboratory of Systematic Mycology and Lichenology Institute of MicrobiologyChinese Academy of Sciences Institutue of Excellence in Fungal Research School of ScienceMae Fah Luang University

Ustilago coicis causes serious smut on Coix lacryma-jobi in Dayang Town,Jinyun County,Zhejiang Province of *** this paper,ultrastructural assessments on fungus-host interactions and teliospore development are presented,and molecular phylogenetic analyses have been done to elucidate the phylogenetic placement of the *** growth within infected tissues was both intracellular and intercellular and on the surface of fungus-host interaction,and the fungal cell wall and the invaginated host plasma membrane were separated by a sheath comprising two distinct layers between the fungal cell wall and the invaginated host plasma *** development of teliospore walls was unique as they appeared to be originated from the *** addition,internal transcribed spacer(ITS) and large subunit(LSU) sequence data showed that *** is closely related to Ustilago trichophora which infects grass species of the genus Echinochloa(Poaceae).

关键词： Fungus-host interaction Molecular phylogenetics Smut Teliospore wall development