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Design,Fabrication and Experiments of an Anthropomorphic Finger with Combined Compliant Joints

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Journal of Bionic Engineering 2020年第6期17卷 1152-1162页

作者： yin Zhang qiang Zhan Ruixin Li Xinyu Bao Robotics Institute Beihang UniversityBeijing 100191China Whiting School of Engineerings Johns Hopkins University Baltimore 21211USA

Fingers are the basic components of anthropomorphic *** present,most anthropomorphic fingers utilize rigid joints,which have obvious fabrication and assembly complexities as well as limited flexibility and ***,some anthropomorphic fingers were attempted to utilize compliant joints learned from bioinspiration,but they have a limited self-resetting ability and lateral deformation resistance,as well as occupying a large space and having a non-anthropomorphic *** this paper,nine compliant joints for anthropomorphic fingers were analyzed using Finite Element Analysis(FEA),based on which two combined compliant joints were proposed,and the optimal one was obtained through FEA and *** anthropomorphic finger that embeds parts of the compliant joint into the adjacent phalanxes was then ***,the anthropomorphic finger was fabricated and experiments were *** results show that the anthropomorphic finger with the proposed combined compliant joints has a better self-resetting ability and lateral deformation resistance while ensuring a large range of motion similar to that of the human finger,and the required actuating force is ***,the embedded joint structure can reduce the occupied space of the joint so as to improve the anthropomorphic appearance of the finger,and enhance its lateral deformation resistance.

关键词： anthropomorphic finger compliant joint deformation stress bioinspiration

DISPERSION STABILITY AND RHEOLOGICAL BEHAVIOR OF SUSPENSIONS OF POLYSTYRENE COATED FUMED SILICA PARTICLES IN POLYSTYRENE SOLUTIONS

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Chinese Journal of Polymer Science 2012年第1期30卷 26-35页

作者： Xian-ze yin Ye-qiang Tan Yi-hu Song qiang Zheng Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Zhejiang University Hangzhou 310027 China Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

Polystyrene coated silica（SiO_2@PS） core-shell composite particles with averaged diameter of about 290 nm were prepared by in situ emulsion polymerization of styrene on the surface ofγ-methacryloxypropyltrimethoxysilane grafted SiO_2 nanoparticles of 20-50 nm in *** behavior and dispersion stability of SiO_2@PS suspension in 10 wt%PS solution were compared with suspensions of untreated SiO_2 and silane modified SiO_2 *** of the untreated and the silane modified SiO_2 exhibited obvious shear *** SiO-2@PS suspension exhibits shear viscosity considerably smaller than suspensions of untreated and silane modified SiO_2 at low shear *** electron microscopy showed that the composite particles can uniformly and stably disperse in PS solution compared to other suspensions,implying that the PS shell can effectively enhance the particle compatibility with PS macromolecules in solution.

关键词： Fumed SiO_2 Polystyrene Composite particles Suspension Steady rheology

Preparation of crystalline rare earth carbonates with large particle size from the lixivium of weathered crust elution-deposited rare earth ores

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International Journal of Minerals,Metallurgy and Materials 2020年第11期27卷 1482-1488页

作者： Jing-qun yin Zhi-qiang Zou Jun Tian Institute of Applied Chemistry Jiangxi Academy of SciencesNanchang 330029China School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Crystalline rare-earth(RE)carbonates having large particle size were prepared from the lixivium of weathered crust elution-deposited rare-earth ores using the precipitation method with ammonium bicarbonate as the *** chemical composition was studied using elemental and thermogravimetric analyses(TGA),and their structure and morphology were characterized using Fourier transform infrared(FTIR)spectroscopy,X-ray diffraction(XRD),and scanning electron microscopy(SEM).The results demonstrate that the crystalline rareearth carbonate is a hydrated basic carbonate or oxycarbonate and not astable intermediate carbonate in the process of thermal *** particle size of crystalline rare-earth carbonates with large particle size is in the range of 50–200μ*** an RE2O3 content of up to 95wt%,the quality of crystalline rare-earth carbonates is higher compared to the Chinese National Standard(GB/T 28882–2012).The quality of the product is superior to the Chinese National Standard.

关键词： rare-earth ores precipitation crystalline rare-earth carbonate large particle size

Theoretical investigation on the excited state intramolecular proton transfer in Me_(2)N substituted flavonoid by the time-dependent density functional theory method

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Chinese Physics B 2018年第5期27卷 534-538页

作者： Hang yin ying shi Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

Time-dependent density functional theory(TDDFT)method is used to investigate the details of the excited state intramolecular proton transfer(ESIPT)process and the mechanism for temperature effect on the Enol^(*)/Keto^(*)emission ratio for the Me_(2)N-substited flavonoid(MNF)*** geometric structures of the S_(0) and S_(1) states are denoted as the Enol,Enol^(*),and Keto*.In addition,the absorption and fluorescence peaks are also *** is noted that the calculated large Stokes shift is in good agreement with the experimental ***,our results confirm that the ESIPT process happens upon photoexcitation,which is distinctly monitored by the formation and disappearance of the characteristic peaks of infrared(IR)spectra involved in the proton transfer and in the potential energy ***,the calculations of highest occupied molecular orbital(HOMO)and lowest unoccupied molecular orbital(LUMO)reveal that the electronegativity change of proton acceptor due to the intramolecular charge redistribution in the S_(1) state induces the ***,the thermodynamic calculation for the MNF shows that the Enol^(*)/Keto^(*)emission ratio decreasing with temperature increasing arises from the barrier lowering of ESIPT.

关键词： time-dependent density functional theory excited state intramolecular proton transfer intramolecular charge transfer transition state

Effective properties of coated fibrous piezoelectric composites with spring-type interfaces under anti-plane mechanical and in-plane electrical loads

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Science China(Physics,Mechanics & Astronomy) 2016年第10期59卷 58-65页

作者： yin shi YongPing Wan Zheng Zhong School of Aerospace Engineering and Applied Mechanics Tongji University

In this paper,we investigate the effective properties of three-phase(matrix/coating/fiber)cylindrical piezoelectric composites with imperfect interfaces under anti-plane mechanical and in-plane electrical *** using the electromechanically coupling spring-type interface model and the generalized self-consistent method(GSM),we analytically derived the effective electroelastic *** present solutions include as special cases the three-phase cylindrical piezoelectric composites with perfect interfaces as well as the two-phase(matrix/fiber)case with imperfect or perfect *** calculations are graphically shown to demonstrate dependence of the effective moduli on the interfacial *** particular size-dependent characteristic due to the interfacial imperfection is also discussed.

关键词： effective moduli piezoelectric composites spring-type interface generalized self-consistent method size effect

Redefined generalized fuzzy ideals of near-rings

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Applied Mathematics(A Journal of Chinese Universities) 2010年第3期25卷 341-348页

作者： ZHAN Jian-ming yin Yun-qiang Department of Mathematics Hubei Institute for Nationalities Enshi 445000 China College of Mathematics and Information Sciences East China Institute of Technology Fuzhou Jiangxi 344000 China

With a new idea, we redefine generalized fuzzy subnear-rings （ideals） of a near- ring and investigate some of its related properties. Some new characterizations are given. In particular, we introduce the concepts of strong prime （or semiprime）（∈, ∈∨ q）-fuzzy ideals of near-rings, and discuss the relationship between strong prime （or semiprime）（∈, ∈∨ q）-fuzzy ideals and prime （or semiprime）（∈, ∈∨ q）-fuzzy ideals of near-rings.

关键词： Near-ring subnear-ring (ideal) (∈^- ∈^-∨ q^-)-fuzzy subnear-ring (ideal) prime (semiprime) (∈ ∈∨ q)-fuzzy subnear-ring (ideal).

Multi-disciplinary design optimization with variable complexity modeling for a stratosphere airship

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Chinese Journal of Aeronautics 2019年第5期32卷 1244-1255页

作者： shi yin Ming ZHU Haoquan LIANG School of Aeronautic Science and Engineering Beihang University School of Automation Science and Electrical Engineering Beihang University

This paper proposes a hybrid architecture based on Multi-disciplinary Design Optimization(MDO) with the Variable Complexity Modeling(VCM) method, to solve the problem of general design optimization for a stratosphere airship. Firstly, MDO based on the Concurrent SubSpace Optimization(CSSO) strategy is improved for handling the subsystem coupling problem in stratosphere airship design which contains aerodynamics, structure, and energy. Secondly, the VCM method based on the surrogate model is presented for reducing the computational complexity in high-fidelity modeling without loss of accuracy. Moreover, the global-to-local optimization strategy is added to the architecture to enhance the process. Finally, the result gives a prominent stratosphere airship general solution that validates the feasibility and efficiency of the optimization architecture. Besides, a sensitivity analysis is conducted to outline the critical impact upon stratosphere airship design.

关键词： Multi-disciplinary design optimization Sensitivity analysis Stratosphere airship Surrogate model Variable complexity modeling

On Ginzburg-Landau Vortices of Superconducting Thin Films

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Acta Mathematica Sinica,English Series 2006年第2期22卷 469-476页

作者： shi Jin DING qiang DU Department of Mathematics South China Normal University Department of Mathematics Penn State University

In this paper, we discuss the vortex structure of the superconducting thin films placed in a magnetic field. We show that the global minimizer of the functional modelling the superconducting thin films has a bounded number of vortices when the applied magnetic field hex 〈 Hc1 ＋ K log ｜ logε｜ where Hc1 is the lower critical field of the film obtained by Ding and Du in SIAM J. Math. Anal., 2002. The locations of the vortices are also given.

关键词： Superconducting thin films Global minimizer Vortices Pinning mechanism

Comparative transcriptomics highlights convergent evolution of energy metabolic pathways in group-living spiders

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Zoological Research 2021年第2期42卷 195-206页

作者： Han Yang Bin Lyu Hai-qiang yin Shu-qiang Li Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China Chengdu Institute of Biology Chinese Academy of SciencesChengduSichuan 610041China College of Life Science Hunan Normal UniversityChangshaHunan 410081China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Although widely thought to be aggressive, solitary,and potentially cannibalistic, some spider species have evolved group-living behaviors. The distinct transition provides the framework to uncover groupliving evolution. Here, we conducted a comparative transcriptomic study and examined patterns of molecular evolution in two independently evolved group-living spiders and twelve solitary species. We report that positively selected genes among groupliving spider lineages are significantly enriched in nutrient metabolism and autophagy pathways. We also show that nutrient-related genes of group-living spiders convergently experience amino acid substitutions and accelerated relative evolutionary rates. These results indicate adaptive convergence of nutrient metabolism that may ensure energy supply in group-living spiders. The decelerated evolutionary rate of autophagy-related genes in group-living lineages is consistent with an increased constraint on energy homeostasis as would be required in a group-living environment. Together, the results show that energy metabolic pathways play an important role in the transition to group-living in spiders.

关键词： Autophagy Cannibalism Convergent Group-living Nutrient Spider