For enriching the database system of special education with ideal retrieval function, the facet classification, post controlled retrieval and hyper chaining techniques are employed.

为了使特殊教育数据库系统具有较为理想的检索功能，本系统采用了分面分类技术、后控检索技术、超链接技术。

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Due to the non-convex of the prior function and hyper-parameters, we use the dynamic posterior simulation rather than the general optimization methods to get reconstruction image.

由于采用的先验函数是非凸的并包含超验参数，一般的优化方法难以处理，采用动态后验模拟的方法可以很好地解决这些问题。

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The result shows that the NPP of salinized meadow in hyper arid area is the function of underground water table (UWT) and the temperature in given soil conditions.

结果表明，在一定土壤质地条件下，盐化草甸植被净初级生产力随地下水埋深的增加而逐渐下降。

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