tentative standard

This paper introduces the content of CCSDS SLE service, and then puts forward a tentative plan that uses international TT& C system based on CCSDS SLE information transfer standard. Finally, the paper presents a scheme design using SLE forward telecommand service.

介绍了CCSDS SLE业务的具体内容，提出了在我国航天测控系统中采用CCSDS标准的SLE传输协议实现国际联网的设想，并给出了前向遥控SLE业务的配置方案。

It only needs to compute standard deviation of gray within sampled pixel area for extracting feature points with our approach. It can be avoided that the limitation to determine threshold value by tentative method according to some prior information on processing image.

该方法提取特征点，仅需对抽样象素区域进行灰度标准差分析，避免了提取图像特征点，根据被处理图像的一些先验信息，利用试探方法确定阈值的局限性。

This paper makes a tentative inquiry into the choice of standard and method about the improved strains of Tung tree and knows the proportion each property accounts for.

对油桐优树选择标准、选择方法进行了初探，得出各性状在选优中所占权重。