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Influence of Liquid Isoprene rubber on Strain Softening of Carbon Black Filled Isoprene rubber Nanocomposites

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Chinese Journal of Polymer Science 2021年第7期39卷 887-895页

作者： feng-yi Hou yi-Hu Song Qiang Zheng MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

The reinforcement of rubbers by nanoparticles is always accompanied with enhanced dissipation of mechanical energy upon large *** for solving the contradiction between improving reinforcement and reducing energy dissipation for rubber nanocomposites have not been well *** carbon black(CB)filled isoprene rubber(IR)/liquid isoprene rubber(LR)blend nanocomposites with similar crosslink density(ve)are prepared and influence of LR on the strain softening behaviors including Payne effect under large amplitude shear deformation and Mullins effect under cyclic uniaxial deformation is *** introduction of LR could improve the frequency sensitivity of loss modulus and reduce critical strain amplitude for Payne effect and loss modulus at the low ***,tuning ve and LR content allows reducing mechanical hysteresis in Mullins effect without significant impact on the mechanical *** investigation is illuminating for manufacturing nanocomposite vulcanizates with balanced mechanical hysteresis and reinforcement effect.

关键词： rubber nanocomposites Stress softening Mechanical hysteresis Liquid rubber

A review of experimental and theoretical research on the deformation and failure behavior of rocks subjected to cyclic loading

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第5期13卷 1203-1230页

作者： yi Liu feng Dai State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

Rock engineering is highly susceptible to cyclic loads resulting from earthquakes,quarrying or *** the fatigue properties and failure mechanism of rocks is pivotal for long-term stability assessment of rock engineering *** far,significant progress has been gained on the mechanical characteristics of rocks subjected to cyclic *** providing a global insight of typical results and main features of rocks under cyclic loading conditions,this study comprehensively reviews the state-ofthe-art of deformation and failure mechanism and fatigue constitutive relationship of rocks subjected to cyclic loading in the past 60 ***,cyclic tests on rocks are classified into different types based on loading paths,loading parameters,loading types and environment ***,representative results are summarized and highlighted in terms of the fatigue response of rocks,including the deformation degradation,energy dissipation,damage evolution and failure characteristics;both laboratory testing and numerical results are presented,and various measurement techniques such as X-ray microcomputed tomography(micro-CT)and digital image correlation(DIC)are ***,the influences of cyclic loads on the mechanical characteristics of rocks are discussed,including the cyclic stress,frequency,amplitude and ***,constitutive relationships for rocks subjected to cyclic loading are outlined,in which typical fatigue constitutive models are compared and analyzed,regarding the elastoplastic model,the internal variable model,the energy-based damage model and the discrete element-based ***,some ambiguous questions and prospective research are interpreted and discussed.

关键词： Cyclic loads Mechanical properties Damage evolution Fatigue failure Constitutive relationship

A Solution of Grid Computing Flow Using MDA Methodology

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The Journal of China Universities of Posts and Telecommunications 2006年第1期13卷 29-33页

作者： JI yi-mu WANG ru-chuan Department of Computer Science Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 P.R. China

This paper presents an approach to build a flow of grid services named GFlow. This approach converts all of the services＇ interfaces in globus toolkit 3 into platform independent model format. The conversion uses eclipse modeling framework plug-ins and graphical editing framework plug-ins to parse the models into platform specific models, which are responsible for implementation of grid services＇ clients and servers and their automatic deployment. This paper emphasizes on design method, which uses model drive architecture, and design process, which uses model-view-control.

关键词： grid computing platform MDA open grid service infrastructure MVC architecture

Comparison of human amniotic fluid-derived and umbilical cord Wharton＇s Jelly-derived mesenchymal stromal cells： Characterization and myocardial differentiation capacity

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Journal of Geriatric Cardiology 2012年第2期9卷 166-171页

作者： Jing Bai Yuan Hu yi-ru Wang Li-feng Liu Jie Chen Shao-Ping Su Yu Wang Department of Cardiology The First Affiliated Hospital of Chinese PLA General Hospital 51 Fueheng Road Haidian District Belling 100048 China Institute of Orthopedics The First Affiliated Hospital of Chinese PLA General Hospital 51 Fucheng Road Haidian District Beijing 100048 China Institute of Geriatric Cardiology Chinese PLA General Hospital 28 Fuxing Road Haidian District Beijing 100853 China The 9^th Consulting Room Chinese PLA General Hospital 28 Fuxing Road Haidian District Beijing 100853 China

Objective To compare the characterization and myocardial differentiation capacity of arnniotic fluid-derived mesenchymal stromal cells （AF MSCs） and umbilical cord Wharton＇s Jelly-derived mesenchymal stromal cells （WJ MSCs）. Methods The human AF MSCs were cultured from amniotic fluid samples obtained by amniocentesis. The umbilical cord WJ MSCs were obtained from Wharton＇s Jelly of umbilical cords of infants delivered full-term by normal labor. The morphology, growth curves, and analyses by flow cytometry of cell surface markers were compared between the two types of cells. Myocardial genes （GATA-4, c-TnT, a-actin, and Cx43） were detected by real-time PCR and the corresponding protein expressions were detected by Western blot analysis after myocardial induced in AF MSCs and WJ MSCs. Results Our findings revealed AF MSCs and WJ MSCs shared similar morphological characteristics of the fibroblastoid shape. The AF MSCs were easily obtained than the WJ MSCs and had a shorter time to reach adherence of 2.7 ± 1.6 days to WJ MSCs of 6.5 ± 1.8 days. The growth curves by MTT cytotoxic assay showed the AF MSCs had a similar proliferative capacity at passage 5 and passage 10. However, the proliferative capacities ofWJ MSCs were decreased at 5 passage relative to 10 passage. Both AF stem cells and WJ stem cells had the characteristics of mesenchymal stromal cells with some characteristics of embryonic stem cells. They express CD29 and CD105, but not CD34. They were positive for Class I major histocompatibility （MHC I） antigens （HLA-ABC）, and were negative, or mildly positive, for MHC Class II （HLA-DR） antigen. Oct-4 was positive in all the two cells types. Both AF MSCs and WJ MSCs could differentiate along myocardium. The differentiation capacities were detected by the expression of GATA-4, c-TnT, a-actin, Cx43 after myocardial induction. Conclusions Both AF MSCs and WJ MSCs have the potential clinical application for myogenesis in cardiac regenerative therapy.

关键词： Human amniotic fluid-derived ceUs Wharton's Jelly-derived cells Myocardial differentiation Mesenchymal stromal cells

An agent-based incentive mechanism for P2P systems

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The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 81-85页

作者： ZHANG Jian-feng WANG ru-chuan College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China State Key Laboratory for Novel Software Technology Nanjing Universtiy Nanjing 210093 China

With the increasing systems, the problems of fair uses of peer-to-peer （P2P） information and resources sharing become serious. P2P systems are self-organizing, distributed systems with no centralized authority, such as Free-riding and Tragedy of Commons. Because of the voluntary participation and lack of motivation, the information and resources available in P2P networks are extremely variable and unpredictable. This article studied the problems existing in P2P networks and propose a different method to stimulate the peers in P2P networks to share information and resources, using agents so as to improve the performance of P2P networks And through simulation experiments and analyzing the results, it can be concluded that this mechanism can effectively solve the problems of fair sharing in P2P systems.

关键词： P2E fair sharing motivate agent

Hydrothermal Synthesis of H_3PW_(12)O_(40)/TiO_2 Nanometer Photocatalyst and Its Catalytic Performance for Methyl Orange

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Chemical Research in Chinese Universities 2012年第3期28卷 366-370页

作者： feng Chang-gen SHANG Hai-ru State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081P.R.China

H3PW12O40/TiO2 nanometer photocatalyst was prepared by one step hydrothermal synthesis from H3PW12O40·nH20 and Ti（OBu）4, simultaneously realizing the load and modification of H3PW12O40. The catalyst was characterized by Fourier transform infrared spectroscopy（FTIR）, powder X-ray diffraction（XRD）, nitrogen adsorp- tion-desorption analysis and scanning electron microscopy（SEM）. The results show that the catalyst is Keggin struc- ture and crystallized in anatase structure, the diameter and specific area of the prepared catalyst are 3.8 nm and 177.9 m^2/g, respectively, and its dispersity is better. The photocatalytic properties were compared for TiO2H3PW12O40/TiO2 prepared by impregnation and H3PW12O40/TiO2 prepared by hydrothermal method with methyl orange as a probe. The effects of H3PW12O40 loadings, crystallization method, initial pH and concentration of dye solution on the degradation of methyl orange were investigated.

关键词： H3PWt2O40/TiO2 Hydrothermal synthesis Photocatalytic performance Degradation Methyl orange

Effective Masses of Mesons and Nucleon in Hot Medium for the Walecka Model

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Chinese Physics Letters 1996年第2期13卷 89-92页

作者： GAO Song ZHANG yi-jun SU ru-keng Department of Physics Fuclan UniversityShanghai 200433 CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Fudan UniversityShanghai 200433

Based on tbe thermo-iield dynamics,the temperature and density dependencies of the elective masses of cr,uj mesons and nucleon in the walecka model have been *** vacuum fluctuation effect is *** is found that the vacuum fluctuation is very important and leads to a reduction of cu-meson mass and an enhancement of a-meson mass in hot and dense medium.

关键词： meson vacuum dynamics

NASICON solid electrolyte coated by indium film for all-solid-state Li-metal batteries

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Tungsten 2022年第4期4卷 316-322页

作者： yi-Jie Liu ru-yi Fang David Mitlin Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX78712USA

The application of all-solid-state Li-metal batteries with solid oxide electrolytes is hindered by interfacial issues,especially the solid electrolyte/Li-metal *** work introduced a uniform indium film layer on the surface of Na^(+)super ionic conductor(NASICON)solid electrolyte Li_(1.5)Al_(0.5)Ge_(1.5)P_(3)O_(12)(LAGP),which promotes the intimate contact between Li metal and solid electrolyte and hinders the side reactions at the *** impedance spectra show that the battery with coated solid electrolyte presents a smaller interfacial resistance and maintains stability after a long cycling *** contrast,the baseline battery with a pure LAGP pellet shows a contact loss after cycling with the vibration of interfacial *** Li symmetric cells with indium-modified solid electrolyte present stable cycling behavior over 400 h at 0.1 and 0.2 mA·cm^(−2).The all-solid-state Li-metal batteries with a Li anode,indium coating LAGP and two kinds of cathodes,namely carbon nanotubes(CNTs)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811),are prepared and *** CNTs cathode for Li-O2 and Li-air batteries has a higher specific capacity than traditional Li-ion battery *** Li-NCM811 batteries deliver an initial Coulombic efficiency of about 75%,with 82%capacity retention after 20 cycles.

关键词： All-solid-state batteries Solid electrolyte Li1.5Al0.5Ge1.5P3O12 Li-metal anode Interfacial chemistry

The Impacts of Drug Price Regulations in China

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Journal of Systems Science and Systems Engineering 2019年第6期28卷 674-693页

作者： yi Liu Juliang Zhang TCECheng yihong ru Guowei Hua Strategic Planning Department/PICC Research Institute of People's Insurance Company(Group)of China Limited Beijing 100031China School of Economics and Management Beijing Jiaotong UniversityBeijing 100044China Department of Logistics and Maritime Studies The Hong Kong Polytechnic UniversityKowloonHong KongChina

To lower pharmaceutical expenditure,the Chinese government has replaced the Fixed Percent Markup (FPM) policy with the policies of the Separation of Outpatient Pharmacies from Hospitals (SOPH) and the Zero Markup Drug (ZMD).We build a multistage game theoretic model comprising a hospital and a drugstore to analyze the policies' impacts on the providers' drug selection and pricing *** comparing the equihibrium outcomes,we draw the following conclusions:(i) FPM,especially for one imposing a strict margin ceiling,actually induces an expensive prescription given patients' great compliance.(ii) Both SOPH and ZMD can conditionally lower patients' expenditure,and their performances rely on the hospital's selection.(iii) A proper rate of insurance coverage and a removal of drug rebate are helpful to improve the policies' performance.

关键词： Drug price regulations patients' expenditure healthcare reform game theory