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东华大学学报（英文版）
东华大学
东华大学学报（英文版）

东华大学

严濒景

双月刊

1672-5220

xuebao@dhu.edu.cn

021-62373643

200051

上海市延安西路1882号《东华大学学报》编辑部

东华大学学报（英文版）/Journal Journal of Donghua University(English Edition)EI
查看更多>>本刊以纺织、合成纤维、服装等学科为特色，兼顾相关学科的学术刊物，主要刊载本校师生员工的科技论文，同时也刊载校外、海外的科研论文。
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    Acoustic Performance of Green Composites for Chinese Traditional Percussion Drums

    GAO QiangLIU FanxiziWANG KeqinZHOU Mengjie...
    91-95页
    查看更多>>摘要：Flax and jute fabrics are adopted to reinforce epoxy matrix composites in order to explore the feasibility of replacing wood in percussion instruments. The fabrics are treated with alkaline solutions to improve interfacial adhesion between fibers and epoxy. The composites are fabricated using the hand-lay and vacuum assisted resin infusion process. Acoustic dynamic moduli, acoustic radiation damping coefficients, and acoustic impedances of the composites are tested and compared with those of the wood regularly used to make the percussion instruments. It is found that the acoustic properties of the composites are within the range of those of the wood, indicating that it could be feasible to replace the wood with natural cellulose fiber reinforced composites in percussion instrument production.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Fabrication and Characterization of Polypyrrole/Polyurethane/Polyamide/Polyamide Yarn-Based Strain Sensor

    LI TingLI Qiao
    96-100页
    查看更多>>摘要：Yarn-based strain sensors serve as essential elements for wearable electronics in the applications of personal health monitoring, motion detection, and smart garments. In the paper, a yarn-based strain sensor was created by coating conductive polymer, polypyrrole(PPy), onto a double covered elastic yarn, i. e., polyurethane/polyamide/polyamide ( PU/PA/PA ) yarn. Surface morphology of the yarn-based strain sensors demonstrates that the PPy conductive particles are evenly distributed on the surface of the PA multi-filaments as well as immersed into the PU core. Cyclic tensile test is conducted to characterize the electro-mechanical performance of the yarn-based strain sensor. The mechanical hysteresis of the sensor is low, which mainly comes from the geometrical change of the PA filaments around the PU core. However, the electro-mechanical hysteresis of the sensor is large mainly due to the unrecoverable cracks of the PPy layers on the PU core.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Friction and Wear Behaviors of C/C-SiC Composites under Water Lubricated Conditions

    GAO WenYANG Fan
    101-107页
    查看更多>>摘要：C/C-SiC composites have the potentiality to be applied in shield pumps of nuclear reactors as the bearing material because of their low density, good mechanical properties and excellent tribological properties. The C/C-SiC composites are fabricated via reactive melt infiltration ( RMI ) using silicon liquid infiltrated in C/C matrix composites. Friction and wear behaviors of C/C-SiC composites under water lubricated conditions are investigated using the block-on-ring test at room temperature, and compared with those of the resin graphite which is used as the bearing material in shield pumps at present. In addition, friction and wear mechanisms of C/C-SiC composites under water lubricated conditions have been discussed. Results show that tensile strengths of C/C-SiC composites are 150210 MPa, and compressive strengths are 403536 MPa. Friction and wear behaviors of C/C-SiC composites are closely related to the load and the speed. The time to reach a stable friction status decreases with the increase of the speed. Though the friction coefficient of C/C-SiC composites under water lubricated conditions is slightly higher than that of graphite, the wear rate of C/C-SiC composites is much lower, which suggests that the C/C-SiC composites can sustain a longer life during operation.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Performance Analysis of Cushioned Sport Soles with Plantar Pressure Test

    LI JingYU HaibinCUI LinaZHANG Rui...
    108-115页
    查看更多>>摘要：Plantar pressure distribution of the designed cushioned soles was studied and compared with that of the commercially available sport shoes. A three-dimensional motion measurement system was used to obtain the peak plantar force, the peak plantar pressure, force-time integrals and pressure-time integrals, and one-way analysis of variance was used to analyze the performance of the designed cushioned shoes. The results revealed that in normal walking and jogging states, compared with the commercially available sport shoes, the peak plantar pressure in the heel region decreased by 13.65％and 6.05％, respectively. The peak plantar force decreased by 15. 98％and 15.32％, respectively. The force-time integral decreased by 4. 36％ and 6. 83％, respectively, and the pressure-time integral decreased by 10. 58％and 11. 00％, respectively. In conclusion, the cushioning performance of shoes is related to the exercise mode. For normal walking, the designed cushioned soles absorbed greater impact in the heel region, which was effectively cushioned, whereas in the jogging state, the designed cushioned soles exhibited a favorable cushioning effect in the forefoot region. The designed cushioned soles exhibited cushioning performance through the coupling design of material and structure, which effectively reduced impact force when landing and could optimize plantar pressure distribution.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Existence Criterion of Three-Dimensional Regular Copper-1, 3, 5-Phenyltricarboxylate ( Cu-BTC) Microparticles

    YANG ChengfeiGAO DongjieHE Jihuan
    116-120页
    查看更多>>摘要：Nano or micro-scale particles are considered as a zero-dimensional material, and their shape is difficult to control. Here the crystal-like microparticles are formed, and the existence criterion of crystal-like low dimensional materials is established. The hydrothermal method is used to fabricate copper-1, 3, 5-phenyltricarboxylate ( Cu-BTC ) microparticles, which have a regular geometric shape with regular triangle, quadrangle and hexagon. The benzene ring and carboxyls (—COOH ) attached to the benzene ring form two basic molecular structures of [ Cu3 ( BTC ) 2 ] n , which play an essential role in the construction of a three-dimensional crystal-like structure.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Generative Adversarial Network with Separate Learning Rule for Image Generation

    YIN FengCHEN XinyuQIU JieKANG Yongliang...
    121-129页
    查看更多>>摘要：Boundary equilibrium generative adversarial networks ( BEGANs) are the improved version of generative adversarial networks (GANs). In this paper, an improved BEGAN with a skip-connection technique in the generator and the discriminator is proposed. Moreover, an alternative time-scale update rule is adopted to balance the learning rate of the generator and the discriminator. Finally, the performance of the proposed method is quantitatively evaluated by Fréchet inception distance ( FID) and inception score ( IS ) . The test results show that the performance of the proposed method is better than that of the original BEGAN.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    A Combined Finite Element Scheme for Second Elliptic Problems Posted in Domains with Rough Boundaries

    ZHOU JiananHUANG LeiXU Shipeng
    130-136页
    查看更多>>摘要：A finite element method ( FEM ) is proposed to solve second elliptic problems posted in domains with rough boundaries. We also present an FEM for elliptic problems as an extension of the original method. The optimal error estimates in the energy norm are also proved. Numerical results for second elliptic equations in regular and rough domains are presented to illustrate the efficiency of our method, respectively, which is consistent with theoretical analysis.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Optimal Control Designs for a Class of Nonviscously Damped Systems

    XIU GuozhongSHI BaoQIAN Feng
    137-142页
    查看更多>>摘要：A scheme for optimal control problem formulation of a class of nonviscously damped system using pseudo-state-space formulation is presented in this paper. Taking the exponentially damped system of nonviscously damped system as an example, a new state space representation is applied to the n-order exponentially damped system. The necessary conditions for the optimality of the exponentially damped system are obtained. A numerical example of a single degree of freedom exponentially damped system is considered to illustrate the methodology and technique.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Dynamic Analysis of Symmetric Duopoly Model with Conjectural Variation

    XU XiaoZHOU WeiCHU Tong
    143-149页
    查看更多>>摘要：The symmetric dynamical model of a Cournot duopoly based on conjectural variation is established. Local stability of the equilibrium point is analyzed and the invariant sets are given. Then, dynamic behavior is studied by numerical simulation. With the change of gradient adjustment parameters, the routes to chaos vary. Synchronization occurs along the invariant sets accompanied by the on-off intermittency through the analysis of transverse stability. Coexistence of multiple attractors and structure of basins of attraction being more complex indicate more complicated bifurcation phenomena.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Wind Speed Prediction by a Hybrid Model Based on Wavelet Transform Technique

    LI ShengpengZHANG ShunYAO HongyuCAO Shibao...
    150-155页
    查看更多>>摘要：It is difficult to predict wind speed series accurately due to the instability and randomness of the wind speed series. In order to predict wind speed, authors propose a hybrid model which combines the wavelet transform technique ( WTT ) , the exponential smoothing ( ES ) method and the back propagation neural network ( BPNN) , and is termed as WTT-ES-BPNN. Firstly, WTT is applied to the raw wind speed series for removing the useless information. Secondly, the hybrid model integrating the ES method and the BPNN is used to forecast the de-noising data. Finally, the prediction of raw wind speed series is caught. Real data sets of daily mean wind speed in Hebei Province are used to evaluate the forecasting accuracy of the proposed model. Numerical results indicate that the WTT-ES-BPNN is an effective way to improve the accuracy of wind speed prediction.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据