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介电高弹体的材料、结构和器件力学（英文）

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第1期17卷 1-21页

作者： feng-bo zhu Department of Engineering Mechanics Zhejiang UniversityHangzhou 310027China Soft Matter Research Center Zhejiang UniversityHangzhou 310027China Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Zhejiang UniversityHangzhou 310027China

目的:介电高弹体是典型电敏性材料,在外加电场的作用下会产生大的变形,这一特点使其成为人工肌肉致动的理想材料,近年来引起研究者的广泛关注。本文着重介绍介电高弹体的基本力学理论和方法,旨在为相关材料、结构和器件的设计提供参考,... 详细信息

目的:介电高弹体是典型电敏性材料,在外加电场的作用下会产生大的变形,这一特点使其成为人工肌肉致动的理想材料,近年来引起研究者的广泛关注。本文着重介绍介电高弹体的基本力学理论和方法,旨在为相关材料、结构和器件的设计提供参考,也有助于不同专业背景的研究者了解并开展介电高弹体的相关研究。概要:本文介绍了近年来关于介电高弹体力电耦合问题的一些理论和数值研究,重点包括力电耦合的控制方程、材料本构关系、粘弹性响应、力电失稳以及致动器设计等方面。文中讨论了基于非平衡热动力学的介电高弹体力学模型处理复杂构型或与时间相关变形时常被采用的数值方法,优化介电高弹体致动极限的力学设计,以及介电高弹体力电响应在典型致动器中的应用。

关键词：人工肌肉智能材料介电高弹体力电耦合本构关系粘弹性力电失稳致动

Tough Polyion Complex Hydrogel Films of Natural Polysaccharides

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Chinese Journal of Polymer Science 2017年第10期35卷 1276-1285页

作者： feng-bo zhu Hai-chao Yu Wen-xi Lei Ke-feng Ren Jin Qian 吴子良 Qiang Zheng Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering Mechanics Zhejiang University Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University

The developments of tough hydrogels in recent years have greatly expanded the applications of hydrogels as structural materials. However, most of the tough hydrogels are made of synthetic polymers. To develop biopolymer-based tough hydrogels has both fundamental and practical significances. Here we report a series of polysaccharides-based tough hydrogel films prepared by polyion complexation and solvent evaporation of chondroitin sulfate（CS） and protonated chitosan（CHT） solutions with different weight ratios. The obtained CS/CHT gel films with thickness of 40-80 μm and water content of 66 wt%-81 wt% possess excellent mechanical properties, with tensile breaking stress and breaking strain being 0.4-3 MPa and 160%-320%, respectively. We found that in the mixture solutions there are large amounts of excess CHT in terms of charges; after swelling the films in water, the acetic acid, which is used to protonate the amino groups of CHT, diffuses out of the gel matrix, enhancing the intermolecular interactions between CHT molecules and thus improving the mechanical properties of gel films, besides the ionic bonds between CS and CHT. Antimicrobial tests also showed that the gel films with low weight ratio of CS to CHT, corresponding to the case with excess CHT, have evident antimicrobial effect. These CS/CHT gel films with good mechanical properties and antimicrobial effect should extend the applications of hydrogels in biomedical fields.

关键词： responsive polymerization methacrylate acrylamide hydrophilic reversible dissipation AMPS toughness swelling

Relationships between endothelial nitric oxide synthase gene polymorphisms and osteoporosis in postmenopausal women

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第8期10卷 609-618页

作者： Shun-zhi LIU Hong YAN Wei-kun HOU Peng XU Juan TIAN Li-fang TIAN bo-feng zhu Jie MA She-min LU Department of Public Health School of Medicine Xi 'an Jiaotong University Xi 'an 710061 China Key Laboratory of Environment and Genes Related to Diseases of Ministry of Education Xi 'an Jiaotong University Xi 'an 710061 China Department of Genetics and Molecular Biology School of Medicine Xi 'an Jiaotong University Xi 'an 710061 China Department of bone and Joint Diseases of Xi 'an Red Cross Hospital Xi 'an 710054 China Department of Forensic Medicine School of Medicine Xi 'an Jiaotong University Xi'an 710061 China

Objective： To investigate the relationships between endothelial nitric oxide synthases （eNOS） G894T and 27 bpvariable number tandem repeat （VNTR） gene polymorphisms and osteoporosis in the postmenopausal women of Chinese Han nationality. Methods： In the present study, 281 postmenopausal women from Xi＇an urban area in West China were recruited, and divided into osteoporosis, osteopenia, and normal groups according to the diagnostic criteria of osteoporosis proposed by World Health Organization （WHO）. The bone mineral density （BMD） values of lumbar vertebrae and left hips were determined by QDR-2000 dual energy X-ray absorptiometry. Blood samples were tested for plasma biochemical indicators including testosterone, estradiol, calcitonin, osteocalcin, and procollagen type I amino-terminal propeptide by enzyme-linked immunosorbent assay （ELISA）, tartrate-resistant acid phosphatase by spectrophotometric method, and the content of nitric oxide by Griess method. Genome DNA was extracted from whole blood, and G894T polymorphism of eNOS gene was analyzed by using polymerase chain reaction-restriction fragment length polymorphism （PCR-RFLP） method and 27 bp-VNTR polymorphism of eNOS gene was genotyped by PCR method. Then the relationships between genotypes and biochemical indicators, genotypes and osteoporosis, and haplotypes and osteoporosis were analyzed. Results： The average BMD values of the femoral neck, ward＇s triangle and lumbar vertebrae 1-4 （LI-L4） in the subjects with T/T genotype in eNOS G894T locus were significantly higher than those in the subjects with G/T and G/G genotypes （P〈0.05）. The average BMD of the femoral neck in the subjects with a/a genotype of eNOS 27 bp-VNTR locus was evidently higher than that in the subjects with b/b genotype （P〈0.05）. The plasma testosterone and osteocalcin concentrations in the subjects of eNOS G894T G/T genotype were evidently higher than those in the subjects of other genotypes （P〈0.05）; the plasma estradiol concentration in

关键词： Postmenopausal women Osteoporosis Endothelial nitric oxide synthase Gene polymorphisms bone mineral density

Effect of fixing distal radius fracture with volar locking palmar plates while preserving pronator quadratus

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Chinese Medical Journal 2014年第16期127卷 2929-2933页

作者： Fan Jian Chen Kai zhu Hui Jiang bo Yuan feng zhu Xiaozhong Mei Jiong Yu Guangrong Department of Orthopedics Tongji Hospital Tongji UniversityShanghai 200065 China

Background L-shaped incision of pronator quadratus （PQ） muscle along its radial and distal borders was always taken for distal radius fractures reduction and internal *** of the PQ muscle was always recommended at the end of operation for some instructive *** repair of PQ is not satisfied because of poor quality of muscle and fascial tissues which may cause pain or impede forearm pronation and supination for post-operative scarring around *** the locking palmar plate to pass under the pronator quadratus muscle and the locking screws are inserted through miniincisions in pronator quadratus in some patients with distal radius fractures is a reasonable technique which can preserve the pronator *** purpose of this study was to evaluate and compare the clinical effects after volar plating of the distal radius fractures while preserving the pronator quadratus and pronator quadratus *** Between September 2010 and April 2012,65 patients （42 males and 23 females; aged 20-68 years and a mean age of 42.5 years） with distal radius fracture underwent open reduction and internal fixation using the volar locking palmar plates （Depuy or Smith companies）.The patients were classified as 23A-2 through 23C-3 according to the Orthopaedic Trauma Association （OTA） *** surgeries were completed by the same trained *** volar locking palmar plates of distal radius performed with preserving pronator quadratus group involved 30 patients including 19 males and 11 females and performed with pronator quadratus repair group involved 35 patients including 23 males and 12 *** compared the two groups for wrist pain,forearm range of motion,grip strength,pedoperative complications and wrist functional recovery *** The minimum follow-up for the whole cohort was one *** differences between the two groups were significant with regard to wrist pain,forearm range of motion,grip strength and wrist function at 1,2,and

关键词： distal radius fracture open reduction palmar plate pronator quadratus

Superplastic behavior of in situ synthesized (TiB+TiC)/Ti matrix composite

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Baosteel Technical Research 2007年第1期1卷 55-59页

作者： Minmin Wang Yuexin Luo bo Ji feng zhu Special Steel Branch Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200940 China

The superplastic deformation behavior of titanium alloy matrix composites reinforced with TiB and TiC was studied. Superplastic tension tests under conditions from 750℃ to 1100℃ and initial strain rates ranging from 2×10^-2 s^-1 to 10^-4s^-1 were carried out. A maximum elongation of 659% was obtained. The micro-structural evolution was studied by means of optical microscopy （OM） and transmission electron microcopy （TEM）. The deformation mechanism and the effect of reinforcement on superplasticity are also discussed.

关键词： titanium matrix composites superplastic behavior activation energy deformation mechanism

Distributions of HLA-A and-B alleles and haplotypes in the Yi ethnic minority of Yunnan, China: relationship to other populations

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第2期11卷 127-135页

作者： bo-feng zhu Guang YANG Chun-mei SHEN Hai-xia QIN Shun-zhi LIU Ya-jun DENG Shuan-liang FAN Li-bin DENG feng CHEN Ping ZHANG Jie FANG Li-ping CHEN Hong-dan WANG Zhen-yuan WANG Rudolf LUCAS Department of Forensic Medicine School of Medicine Xi 'an Jiaotong University Xi 'an 710061 China Key Laboratory of Environment and Genes Related to Diseases of Ministry of Education Xi'an Jiaotong University Xi 'an 710061 China Vascular Biology Center Medical College of Georgia Augusta Georgia 30912 USA Shaan'xi Blood Center Xi 'an 710061 China Institute of Molecular Medicine and Genetics Medical College of Georgia Augusta Georgia 30912 USA Department of Public Health School of Medicine Xi'an Jiaotong University Xi'an 710061 China Center of Forensic Sciences Beijing Genomics Institute Beijing 101300 China Faculty of Basic Medical Science Nanchang University Nanchang 330006 China

Objective: To investigate the distributions of human leukocyte antigen (HLA)-A and-B alleles and HLA-A-B haplotypes in the Yi ethnic minority of the Yunnan Province, situated in southwestern China. Methods: DNA typing for HLA-A and-B loci was performed using the polymerase chain reaction-sequence-based typing (PCR-SBT) method on 114 randomly selected healthy individuals of the Yi population. The allelic frequencies of HLA-A and-B loci were calculated by direct counting and HLA-A-B haplotypes were estimated using the expectation maximization algorithm. Results: A total of 17 HLA-A and 38 HLA-B alleles were found in the Yi population. The most frequent alleles were A2402 (32.46%), A1101 (26.32%), and A0203 (10.09%) at the HLA-A locus and B4601 (12.28%), B1525 (10.09%), B4001 (8.77%), and B3802 (7.89%) at the HLA-B locus. The predominant HLA-A-B haplotypes were A2402-B1525 (7.86%) and A0203-B3802 (5.64%), followed by A1101-B4001 (4.69%). Phylogenetic analysis indicates that the Yi population in the Honghe, Yunnan Province of China basically belongs to groups of southeastern Asian origin, but shares some characteristics with northeastern Asian groups. Conclusion: The present study may add to the understanding of HLA polymorphism in the Yi ethnic group that was poorly defined previously, and provide useful information for bone marrow transplantation, anthropological research, and forensic sciences as well as for disease-association studies.

关键词： Yi ethnic minority Human leukocyte antigen (HLA)-A HLA-B Allele Haplotype Polymerase chain reaction-sequence-based typing (PCR-SBT)

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang feng Gao Yu-Gui Peng Peng Wu Zong-Lin Li Xue-feng zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

Genetic distribution and forensic evaluation of multiplex autosomal short tandem repeats in the Chinese Xinjiang Mongolian group

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2019年第3期20卷 287-293页

作者： Yuan-yuan WEI Xiao-ye JIN Qiong LAN Wei CUI Chong CHEN Ting-ting KONG Yu-xin GUO Jian-gang CHEN bo-feng zhu Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an 710004China Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases College of StomatologyXi’an Jiaotong UniversityXi’an 710004China College of Medicine and Forensics Xi’an Jiaotong University Health Science CenterXi’an 710061China Department of Forensic Genetics School of Forensic MedicineSouthern Medical UniversityGuangzhou 510515China Institute of Forensic Science Ministry of Public SecurityBeijing 100038China

To further enrich the genetic data of the Chinese Xinjiang Mongolian group,the genetic distribution and forensic parameters of 19 autosomal short tandem repeats(STRs)were ***,249 alleles were observed in these 19 *** mean values of the polymorphism information content(PIC),match probability(MP),discrimination power(DP),and probability of exclusion(PE)for these 19 STRs were 0.7775,0.0699,0.9301,and 0.6085,***,the cumulative DP and PE values obtained in the Mongolian group were 0.999 999 999 999 999 999 999 995 67 and 0.999 999 992 163,respectively.

关键词：新疆蒙古族短串联重复序列(STR) 法医学

Allelic frequency distributions of 21 non-combined DNA index system STR loci in a Russian ethnic minority group from Inner Mongolia,China

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第6期14卷 533-540页

作者： Hong-dan WANG Chun-mei SHEN Wen-juan LIU Yu-dang ZHANG Guang YANG Jiang-wei YAN Hai-xia QIN bo-feng zhu School of Medicine Xi'an Jiaotong University People's Hospital of Zhengzhou University Medical Genetic Institute of Henan Province People's Hospital of Henan Province Blood Center of Shaanxi Province Vascular Biology Center Georgia Health Sciences UniversityAugustaGA 30912USA Beijing Institute of Genomics Chinese Academy of Science Department of Internal Medicine Morehouse School of MedicineAtlantaGA 30303USA

We studied the allelic frequency distributions and statistical forensic parameters of 21 new short tandem repeat(STR)loci and the amelogenin locus,which are not included in the combined DNA index system(CODIS),in a Russian ethnic minority group from the Inner Mongolia Autonomous Region,China.A total of 114 bloodstain samples from unrelated individuals were extracted and co-amplified with four fluorescence-labeled primers in a multiplex polymerase chain reaction(PCR)*** capillary electrophoresis,the PCR products of the 21 STR loci were separated and genotyped.A total of 161 alleles were observed in the Russian ethnic minority group,and corresponding allelic frequencies ranged from 0.0044 to *** 21 non-CODIS STR loci of the Russian ethnic minority group were characterized by high genetic diversity and therefore may be useful for elucidating the population's genetic background,for individual identification,and for paternity testing in forensic practice.

关键词： Short tandem repeat(STR) Russian population Genetic polymorphisms