• Based on the saltation, creeping and stability models, a two-dimensional numerical model is established to study the development process of aeolian ripples.

    通过简单的模型移模型稳定模型风成沙纹形成过程进行了二维数值模拟研究

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  • The two-dimension CAD and its software of low layer are being used to draw is very popular, but the three-dimensional CAD system of independent development is still immature in domestic.

    国内在将CAD及其软件用于层次绘图普及自主开发维CAD系统未成熟

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  • To research on it and contribute to its development, this paper brings forward a business model analysis framework which is applicable to handset two-dimensional code business.

    手机二维码业务作为一种新兴业务具有广阔的应用前景本文分析商业模式提出了适用于手机二维码业务的商业模式分析框架

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  • An improved method of two-dimensional development in thin-layer chromatography is described in this paper.

    描述一种薄层色谱二维展开改进方法

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  • An improved method of two-dimensional development in thin-layer chromatography is described in this paper.

    描述一种薄层色谱二维展开改进方法

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