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| 1 | Investigating the dynamic mechanical behaviors of polyurea through experimentation and modeling显示文摘Polyurea is widely employed as a protective coating in many fields because of its superior ability to improve the anti-blast and anti-impact capability of structures.In this study,the mechanical properties of polyurea XS-350 were investigated via systematic experimentation over a wide range of strain rates(0.001-7000 s^-1)by using an MTS,Instron VHS,and split-Hopkinson bars.The stress-strain behavior of polyurea was obtained for various strain rates,and the effects of strain rate on the primary mechanical properties were analyzed.Additionally,a modified rate-dependent constitutive model is proposed based on the nine-parameter Mooney-Rivlin model.The results show that the stress-strain curves can be divided into three distinct regions:the linear-elastic stage,the highly elastic stage,and an approximate linear region terminating in fracture.The mechanical properties of the polyurea material were found to be highly dependent on the strain rate.Furthermore,a comparison between model predictions and the experimental stress-strain curves demonstrated that the proposed model can characterize the mechanical properties of polyurea over a wide range of strain rates. | Hao Wang Ximin Deng Haijun Wu Aiguo Pi Jinzhu Li Fenglei Huang | 2019 | Defence Technology(防务技术)2019，15，6： | 13 |
| 2 | Curative effect of assisted reproduction technology by Traditional Chinese Medicine multi-channel interventional therapy on 95 cases of in vitro fertilization and embryo transfer failure显示文摘OBJECTIVE: To evaluate the curative effect of Traditional Chinese Medicine(TCM) multi-channel interventional therapy on women with Assisted Reproductive Technology(ART) failure, to compare the curative effect of the dual therapy and triple therapy on women with ART Failure, and to choose the best TCM interventional therapeutic plan.METHODS: The 95 cases with ART Failure from West China second University Hospital of Sichuan University meeting the inclusion criteria were randomly divided into three groups:dual therapy group(31 cases), triple therapy group(33 cases)and control group(31 cases). According to the intervene treatment of in vitro Fertilization and Embryo Transfer(IVF-ET) long cycle scheme, the control group wait naturally for 3 months before IVFET. The dual therapy group take TCM prescriptionⅡ of cultivating emotion and assisting reproduction and auricular acupoint therapy for 3 months before IVF-ET, then Western Medicine treatment progestin supporting as well as auricular application and Antai Recipe after IVF-ET transplantation.The triple therapy group take TCM prescription Ⅱof cultivated emotion and assisted reproduction,auricular acupoint therapy and retention enema of TCM, and combination treatment the same as dual therapy group after transplantation. The natural pregnancy number, the period condition of secondary IVF-ET and the improvement of the kidney deficiency, liver depression and blood stasis syndrome among those three groups were compared.RESULTS: It was showed from analysis in 95 cases with ART failure that the number of natural preg-nancy was as followings: 3 patients from the dual therapy group, 10 patients from the triple therapy group, and no patient from the control group. The comparison among three groups have statistical significance(P < 0.05). The treatment group is superior to the control group, while the triple therapy is superior to the dual therapy. The comparison of the condition of the fertility rate, clinical pregnancy rate, biochemical pregnancy rate and early abortion rate during the period of secondary IVF-ET between pre-therapy and post-treatment of both the dual therapy group and the triple therapy group have statistical significance(P < 0.05). The comparison of the improvement of the kidney deficiency,liver depression and blood stasis syndrome between pre-therapy and post-treatment of both the dual therapy group and the triple therapy group have statistical significance(P < 0.05). The comparison between three groups after treatment have statistical significance(P < 0.05).CONCLUSION: TCM multi-channel interventional therapy can increase the natural pregnancy rate of patients with ART Failure(the triple therapy is superior to the dual therapy); it can increase the fertility rate, clinical pregnancy rate, and decrease the early abortion rate during the period of secondary IVF-ET; it can improve syndromes of kidney deficiency, liver depression and blood stasis. | Xia Wanting Zhong Yanmei Zhang Ying Xue Huarong Huang Jinzhu Wang Zhen Zhou Hang Ma Qianhong Zeng Qian | 2017 | Journal of Traditional Chinese Medicine2017，37，5： | 4 |
| 3 | Effects of cathode materials on discharge characteristics of Li B alloy/FeS_2 thermal battery显示文摘The effects of FeS 2 on the discharge characteristics of Li B alloy/FeS 2 thermal battery had been studied. Results showed that 2.5%(mass fraction)Li 2O would be needed to rule out the voltage pulse in the first part of discharge curves for the FeS 2 powder of small particle size (<44 μm). After thermal decomposition, the FeS 2 had transformed to Fe (1- x ) S where x =0.024~0.066. The deficiency of the cathode FeS 2 would make discharge voltage decrease 0.4 V. In the discharge test at high temperature (600 ℃), the discharge voltage decreased fast with the acceleration of the thermal decomposition of FeS 2. | Liu Zhijian(刘志坚), Duan Wei(段 伟), Li Zhiyou(李志友), Huang Yinghua(黄英华) ,Qu Xuanhui(曲选辉),Huang Baiyun(黄伯云) Powder Metallurgy Institute, Central South University of Technology, Changsha 410083, P.R.China Jinzhu Powder Injection Man | 1999 | 中国有色金属学会会刊:英文版1999，9，3： | 1 |
| 4 | Numerical simulations of tungsten alloy rods penetration into alumina ceramic/armor steel composite target 显示文摘 | Li Jinzhu Huang Fenglei Zhang Liansheng | 2008 | Transactions of Beijing Institute of Technology2008，17，3： | 1 |
| 5 | Resonance and Bifurcation of Fractional Nonlinear Systems with Power Damping Term for Robot Grinding显示文摘A fractional nonlinear system with power damping term is introduced to study the forced vibration system in order to solve the resonance and bifurcation problems between grinding wheel and steel bar during robot grinding.The robot,grinding wheel and steel bar are reduced to a spring-damping second-order system model.The implicit function equations of vibration amplitude of the dynamic system with coulomb friction damping,linear damping,square damping and cubic damping are obtained by average method.The stability of the system is analyzed and explained,and the stability condition of the system is proposed.Then,the amplitude-frequency characteristic curves of the system under different fractional differential orders,nonlinear stiffness parameters,fractional differential term coefficients and external excitation amplitude are analyzed.It is shown that the fractional differential term in the dynamic system is the damping characteristic.Then the influence of four kinds of damping on the vibration amplitude of the system under the same parameter is investigated and it is proved that the cubic damping suppresses the vibration of the system to the maximum extent.Finally,based on the idea that the equilibrium point of the system is the constant part of the Fourier series expansion term,the bifurcation behavior caused by the change of damping parameters in linear damping,square damping and cubic damping systems with different values of fractional differential order is investigated. | Wei Shi Qingxue Huang Jinzhu Zhang Tao Wang Ziliang Li Yanjie Zhang Xiaoyan Xiong | 2023 | Journal of Beijing Institute of Technology2023，32，1： | 0 |
| 6 | Photocatalysis and ambient catalysis for environmental remediation显示文摘Environmental pollution is a major challenge faced by human beings, and is becoming more serious due to increasing urbanization and industrialization. Catalysis is the key technology for environmental remediation. As a “green” technology, photocatalysis and ambient catalysis could offer numerous opportunities to realize environmental remediation under mild reaction conditions with low energy input. Over the past two decades, great advances have been made on the design and synthesis of the photocatalysts and ambient catalysts, precise control of catalyst active sites, and the mechanistic understanding on the catalytic process for environmental remediation. | Yongfa Zhu Chuncheng Chen Changbin Zhang Fan Dong Haibao Huang Jinzhu Ma | 2023 | Journal of Environmental Sciences2023，，12： | 0 |
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