A collaborative spatial data production model in grid environment is proposed, especially the quality controlling policies are analyzed, and all above is validated in the system prototype.

提出了网格环境下的空间数据协作生产模型，分析了其质量控制策略，通过系统原型对本文思想进行了验证。

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In order to deposit high quality and uniform thin films, it is necessary that we study the plasma characteristics in PECVD system, especially the spatial distribution of electron characteristics.

为了制备出高质量的、均匀的薄膜材料，这就要求我们对该系统中的等离子体特性，特别是对电子特性的空间分布规律进行深入的研究。

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The system achieves video streaming reliable transmission in IP network, and meets the individual requirements of the different users for spatial resolution, frame rate and video quality.

该系统实现了视频流在IP网络上的可靠传输，并且满足了不同用户对空间分辨率、帧率和视频质量的个性化需求等。

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