The main research results are summarized as follows : 1 . the systems of land expropriation in our country possess the basic features such as nation subject , compulsion of expropriation , commonality of purpose , properly compensability , uniqueness of object , approbation of legal procedure , compensation to person not to land , and obvious shadow of planned economy 其主要研究结果如下： 1我国土地征用的主体是国家，征用具有强制性、征用的公共目的性、征用土地适当补偿性、征用土地的标的只能是集体所有的土地、征用土地应经过法定的程序、对人不对地的补偿、具有很强的计划经济色彩等基本特征。
2.
A novel motion estimation algorithm which is based on compensability analysis of the input video signal is proposed . the motion estimation operation is performed only on the compensable blocks in the image frame . the time of estimation computation and the bits for coding the motion vectors are all reduced significantly than those of conventional algorithms 本文介绍了一种新颖的运动矢量估计算法，我们首先对待编码的图像进行可补偿性分析，然后运动矢量搜索只对可补偿块操作，因此无论是搜索次数还是用于对运动矢量编码的比特数均明显少于传统算法
