Xiaokai Chen

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Two α-MnO2 crystals with caddice-clew-like and urchin-like morphologies are prepared by the hydrothermal method, and their structure and electrochemical performance are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), galvanostatic cell cycling, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS). The morphology(More)
The large-scale complex system of the practical engineering design always contains multiply optimization objectives and multiply disciplines. Aiming at the large-scale system Multidisciplinary design optimization (MDO) design problem with the serious conflicts between the different design objectives, we describe the integration of Linear Physical(More)
In interior air environment of cars, the mass concentrations of volatile organic compounds (VOC) are so high that human health is threatened. Their sources are analyzed and the controlling strategies and technologies are discussed. Reduce interior temperature, enhance vehicle ventilation, control interior materials, clean air-conditioning on time and use(More)
This paper mainly analyzes the core contents of IA, which contain Organization System, Navigation System, Labeling System, and Search System. on the basis of former researches, the article puts forward a set of evaluation system with observation principles of second index for B-C e-commerce website IA, and endows different power to indexes with analytic(More)
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