The system is an on - limits tool system . the embodiment are as follows , the first thing is that the describing method of the parts information can be defined by user , the second is that the basal data can be defined by user also such as cell feature , shape feature , array form , etc , the third is that the relation between the process knowledge of parts group and the information model of parts group can be defined by user , the last is that one engineering database manage the process knowledge , all kinds of basal data , user definition and so on . it realizes not only the abruption between data and program but also the abruption between knowledge and illation 本系统是一个开放的工具系统，体现在以下几个方面： ( 1 )零件信息的描述方法(零件组信息模型)可由用户定义， ( 2 )基础数据如单元特征、形状特征、阵列形式等可由用户自定义， ( 3 )零件组工艺知识与零件组信息模型的关系可以由用户自定义， ( 4 )工艺知识、各种基础数据、以及用户模型定义等都由一个统一的工程数据库来管理，实现了数据与程序相分离，知识与推理机相分离。
Results it was found that 11 cases of mammoductal ectasis were characterized by ductal dilatation and smooth walls ; 3 cases of mammary - ductal mastitis showed ductal tree thinning and smooth walls ; 45 cases of ductoectasis complicated by infection showed irregular ductal dilatation ; 46 cases of intraductal papilloma showed ovoid or round filling defects and " cupping " abruption in one or more ducts ; 7 cases of ductal carcinoma showed irregular filling defects or abruption with ductal stenosis 结果单纯性乳导管扩张症11例，导管均匀扩张，管壁光滑；单纯性乳导管炎3例，导管树变细，管壁光整；乳导管扩张伴炎症45例，导管树不按比例扩张增粗；乳导管内乳头状瘤46例，圆形、类圆形充盈缺损，导管呈“杯口状”中断，多发乳头状瘤和乳头状瘤病表现为多支导管充盈缺损，导管节段性显示，边缘光滑；乳导管癌7例，乳导管不规则充盈缺损或中断，导管壁僵硬。
Wavelet transform also has time - frequency orienting ability and realize the abruption of the balanced and unbalanced component in images . this paper , based on particularly expatiating information characters in sar image data , will investigate compression algorithm applying for sar images by analyzing embedded encoding algorithms using wavelet theory . using several standards to evaluate our method and spiht algorithm , it is clear that our method outgoes spiht algorithm 本文在对sar图像数据的信息特征进行了详细阐述的基础上，利用小波理论分析近年来比较流行嵌入式压缩编码方法，来研究适用于sar图像的压缩方法，取得以下研究成果： ( 1 )考虑到sar图像的动态范围比较大，而且sar图像斑点噪声模型大部分是乘性噪声，先对其进行对数变换，既可以缩小数据的动态范围，也可以把乘性噪声转变成加性噪声模型。
