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Kineto-elastodynamic analysis of hose cutting mechanism of an aluminum electrolytic capacitor casing machine

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Journal of Central South University 2017年第5期24卷 1217-1224页

作者： XIA Bi-zhong REN Shi-yuan LIU xin-cheng xu Chao Division of Advanced Manufacturing Graduate School at ShenzhenTsinghua UniversityShenzhen 518055China

The kineto-elastodynamic(KED) model of a hose cutting mechanism used in the aluminum electrolytic capacitor(AEC) casing machine is developed to investigate the dynamic characteristics. According to the composition characteristics, the cutting mechanism is divided into cam-roller and linkage two substructures. And the dynamic models of the two substructures are established using the lumped parameter method and finite element method(FEM), respectively. In the model, the compliances of the camshaft and the links are taken into consideration. The elastic displacement of the links, angular error of the cutter and the dynamic stress of the links are analyzed based on the KED model. The results provide important information for structure optimization and vibration control of the mechanism.

关键词： cutting mechanism kineto-elastodynamic lumped parameter method finite element method dynamic stress

A general principle enabling the design of ultrastable metal nanocatalysts

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Science China Chemistry 2022年第4期65卷 641-642页

作者： xin xu Collaborative Innovation Center of Chemistry for Energy Materials ShanghaiKey Laboratory of Molecular Catalysis and Innovative MaterialsMOE Key Laboratory of Computational Physical SciencesShanghai Key Laboratory of Bioactive Small MoleculesDepartment of ChemistryFudan UniversityShanghai 200433China

The design and the development of catalysts with high activity,high selectivity and high stability are of great significance for improving the efficiency of catalytic reactions,saving energy and reducing consumption,which is particularly important for achieving the dual-carbon *** development and the guidance of advanced catalytic theories are urgently needed[1].The Sabatier’s principle of catalyst activity states that the interaction between the reactants and the catalyst should not be too strong or too *** one of the basic theories of heterogeneous catalysis developed on this basis in the past century,it has profoundly affected the design of modern catalysts[2].

关键词： catalyst catalysis reactant

A non-uniform grid for triangular differential quadrature

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Science China(Physics,Mechanics & Astronomy) 2016年第12期59卷 52-59页

作者： HongZhi zhong Jia xu Department of Civil Engineering Tsinghua University

The triangular differential quadrature method based on a non-uniform grid is proposed in the paper. Explicit expressions of the non-uniform grid point coordinates are given and the weighting coefficients of the triangular differential quadrature method are determined with the aid of area coordinates. Two typical examples are presented to testify the effectiveness of the non-uniform grid. It is shown that rapid convergence is achieved under the non-uniform grid in comparison with those from the uniform grid with the same order of approximation.

关键词： differential quadrature triangular differential quadrature non-uniform grid weighting coefficient affine transformation

Self-Aggregation Enhanced Third-Order Optical Nonlinearities of Aryloxy Substituted Zinc Phthalocyanines

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Chinese Physics Letters 2013年第12期30卷 42-45页

作者： LI zhong-Yu WU Chun-Hui HUANG xin xu Song Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Department of Petrochemical EngineeringChangzhou UniversityChangzhou 213164 Institute of Animal and Plant Quarantine of Chinese Academy of Inspection and Quarantine Beijing 100029

Third-order optical nonlinearities of three aryloxy substituted phthalocyanines are measured by femtosecond forward degenerate four-wave mixing technique at 800 *** optical responses are observed and the magnitude of the second-order hyperpolarizabilitiesγof the phthalocyanines is measured to be as large as 10?31 *** to the enhancement of J-aggregates,theγvalue of an aryloxy substituted zinc phthalocyanine in chloroform is approximately 2.2 times larger than that of the dye in ***,the morphologies of aryloxy substituted zinc phthalocyanine in chloroform exhibit that the nanowires with a diameter of 50–100 nm are connected to each other to form an indefinite network structure,while no aggregates are detected when the samples are prepared from a solution in the methanol.

关键词： phthalocyanine substituted methanol

Recruiting endogenous stem cells： a novel therapeutic approach for erectile dysfunction

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Asian Journal of Andrology 2016年第1期18卷 10-15页

作者： zhong-Cheng xin Yong-De xu Guiting Lin Tom FLue Ying-Lu Guo Andrology Center Peking University First Hospital Peking University Beijing 100034 China Knuppe Molecular Urology Laboratory Department of Urology School of Medicine University of California San Francisco CA USA.

Transplanted stem cells （SCs）, owing to their regenerative capacity, represent one of the most promising methods to restore erectile dysfunction （ED）. However, insufficient source, invasive procedures, ethical and regulatory issues hamper their use in clinical applications. The endogenous SCs/progenitor cells resident in organ and tissues play critical roles for organogenesis during development and for tissue homeostasis in adulthood. Even without any therapeutic intervention, human body has a robust self-healing capability to repair the damaged tissues or organs. Therefore, SCs-for-ED therapy should not be limited to a supply-side approach. The resident endogenous SCs existing in patients could also be a potential target for ED therapy. The aim of this review was to summarize contemporary evidence regarding：（1） SC niche and SC biological features in vitro; （2） localization and mobilization of endogenous SCs; （3） existing evidence of penile endogenous SCs and their possible mode of mobilization. We performed a search on PubMed for articles related to these aspects in a wide range of basic studies. Together, numerous evidences hold the promise that endogenous SCs would be a novel therapeutic approach for the therapy of ED.

关键词： endogenous stem cell erectile dysfunction homing niche

The efficient utilization of low-grade scheelite with X-ray transmission sorting and mixed collectors

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Tungsten 2023年第4期5卷 570-580页

作者： Qi-Hong xu Zhi-An Liang Hao Duan zhong-Mei Sun Wei-xin Wu State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores Longyan364200China Xiamen Zijin Technology of Mining&Metallurgy Ltd Xiamen361101China Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China

Nowadays,with the depletion of high-grade scheelite resources,the efficient exploitation of complex,low grade with complicated geological structure scheelite ore have to take into *** work introduces a feasible mineral processing method for the beneficiation of low grade and complex scheelite using the X-ray transmission(XRT) pre-concentration technology and mixed *** results of XRT sorting shown that 94.85% WO_(3) can be recovered with the discarding rate reached40.62%.The closed-circuit flotation of actual ore using mixed collector obtained scheelite concentrate of 61.09% WO_(3) grade with WO_(3) recovery of 89.49%.The combined flowsheet of XRT sorting and mixed collector brought about RMB 4.5 million yuan profit per year for the mine company.

关键词： Scheelite XRT sorting Mixed collector Sustainability

Ionic liquid functionalized polymer composite nanotubes toward dye decomposition

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Chinese Chemical Letters 2015年第8期26卷 942-945页

作者： Shu-Qin Cui xu-Yang Ji Fu-xin Liang Zhen-zhong Yang State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences

Poly（ionic liquid） functionalized composite nanotubes are achieved by ATRP grafting ionic liquid monomers for example ViEtIm^＋Br^- from the poly（DVB-co-VBC） nanotubes surface. PW12O40^3- anion is introduced through anion exchange. The PW12O40^3- based composite nanotubes can synchronously absorb and decompose water soluble dyes for example methyl orange（MO）. The cooperative interplay is promising in highly efficient decomposition of dyes.

关键词： nanotubes toward decompose ionic orange ATRP Ionic absorb dispersed ethanol

Experimental Research on Oxidation Refining of Ferrosilicon

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Journal of Iron and Steel Research International 2001年第1期8卷 6-10页

作者： WANG xin-guo DING Wei-zhong JIANG Guo-chang xu Kuang-di Shanghai University

This paper explained the mechanism of carbon pickup by ultra low carbon steels during continuous casting and indicated that the major cause of carbon pickup is the contact of the molten steel with the enriched carbon layer of the powder. Forming of the enriched carbon layer is due to the existing of “carbon core”. Accordingly, the measures to reduce the carbon content and amount of the enriched carbon layer were investigated. A kind of new powder has been developed and successfully used to minimize the carbon pickup by ultra low carbon steels during continuous casting.

关键词： ultra low carbon steel continuous casting mold powder carbon pickup

Feedforward compensation of the insertion devices effects in the SSRF storage ring

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Nuclear Science and Techniques 2022年第6期33卷 34-44页

作者： xin-zhong Liu Shun-Qiang Tian xu Wu Meng Wang Zhen-Tang Zhao Bo-Yuan Feng University of Chinese Academy of Sciences Shanghai 201800China Shanghai Institute of Applied Physics Chinese Academy of SciencesBeijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Shanghai University Shanghai 200444China Tsinghua University Beijing 100084China

The lattice of the Shanghai Synchrotron Radiation Facility(SSRF) storage ring was upgraded in the Phase-II beamline project, and thus far, 18 insertion devices(IDs) have been installed. The IDs cause closed-orbit distortions, tune drift, and coupling distortions in the SSRF storage ring, all of which are significant issues that require solutions. In this study, an ID orbit feedforward compensation system based on a response matrix using corrector coils was developed, and it was applied to all commissioned IDs in the SSRF storage ring. After correction, the maximum ID-induced horizontal and vertical orbit distortions were less than 5.0 and 3.5 μm, respectively. Some interesting phenomena observed during the measurement process were explained. Additionally, optical and coupling feedforward systems were developed using quadrupole and skew quadrupole magnets installed on the front and back of elliptically polarizing undulators(EPUs). Moreover, over nearly four months of operation, the developed strategy delivered a satisfactory performance in the SSRF storage ring.

关键词： Shanghai Synchrotron Radiation Facility(SSRF) Insertion devices(IDs) Closed-orbit distortion Tune shift Coupling Feedforward