Based on principle of reverse osmosis and used microcomputer 89c52 as controller, an automatic detection instrument of sludge density index (SDI) of water pollution is designed.
基于反渗透原理，以89c52单片机为控制器，设计了水污染指数中的淤积密度指数(SDI)的自动在线测试装置。
The road density index analysis has two ways: the post-classification compare method based on spectral-spatial structure and the imagery difference method based on spectral-spatial structure.
道路密度指数分析法有两类方法：基于光谱—空间结构的分类后比较法和基于光谱—空间结构的图像差值法。
Methods: Using X-ray; bone mineral density index and bone biochemistry measure 369 cases of old fracture who have been fracture in three years through means of Evidence-based medicine.
方法：在循证医学指导下对福利院369名老年人中3年间发生骨折的病人进行X线摄片和骨密度、骨生化代谢指标测定。
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