( 1 ) an improved parameterized matching algorithm is constructed , the improvment is that extending the matching unit from the char to statement , as a result the transform function is redefined and the complexity of the algorithm is decreased , so it is fit for detecting the duplication codes in more large scale program 所作的工作有两部分， ( 1 )对baker的参数化匹配算法进行了改进。把匹配单位由单个的字符变为程序中的语句，为了配合匹配单位的改变，重新定义了转换函数。
In this thesis , some key issues of the vr technique are systematically investigated . firstly , for the image filters and image interpolation between slices , a integrated interpolation algorithm is presented based on the contour shape and correspondence matching , which keeps the shapes and grays information the objects of interest . secondly , the fidelity of effect of the vr for medical images is studied , and a continuous - gradient - based method for transparent volume rendering is proposed , which vivifies the results of volume rendering 首先，研究了医学断层图像数据的滤波及层间插值技术，提出了一种基于轮廓形变和对应点匹配相结合的混合插值算法，在实现图像层间插值的同时保持了目标的轮廓形状与灰度信息；其次，对医学影像容积重建效果的逼真度进行了研究，提出了一种基于连续梯度转换函数的交互式透明体绘制方法，使重建效果更加生动、真实。
Assemblage ) represented the coastal shallow - water environment ; factor 2 ( protelphidium tuberculatum assemblage ) represented the alongshore cold - water current area or cold shallow sea environment ; factor 3 ( elphidium magellanicum assemblage ) represented the sh allow sea ( < 20 - 30m depth ) deposit ; factor 4 ( ammonia ketienziensis assemblage ) represented the shallow - sea water more than 50m depth ; and factor 5 ( buccella frigida assemblage ) represented the colder - water sea environment ; and the distribution of factor load accorded with the character of benthic foraminifer community Q型因子分析揭示ey02 - 2孔5种有孔虫组合，分别对应滨岸盐沼环境、黄海沿岸流冷水分布区、高潮坪浅海沉积环境、水深大于50m的现代浅海环境及较冷的沉积环境。因子载荷的分布与有孔虫群落特征吻合较好。南黄海有孔虫含量? ?水深转换函数关系式有一定的局限性，并不能在南黄海陆架地区推广使用。
