After automatically extracting binary image of building profile, the approach establishes combination way of boundary dots grouping by basal point, then adopts piecewise linear fitting by least-square algorithm, in which the key step is how to accurately detect group of boundary dots joining in fitting.
该方法自动提取建筑物二值图上的轮廓点，而后进行以基础点为划分点列组合依据的处理，再采用最小二乘法进行分段线性拟合，其中关键步骤就是如何准确识别参与拟合的轮廓点群。
Presented two schemes of using IDEA grouping cipher arithmetic to build hashing function and with double key system to achieve identity authentication and digital signature;
在IDEA算法的基础上，提出了两种方案来构造单向散列函数，结合双密钥体制，在传输明文信息时，通过消息摘要，实现了一种认证和数字签名的方案。
Based on four-level key hierarchy, a new key distribution scheme based on grouping access control for conditional access system in digital TV (DTV) broadcasting was presented.
在4级密钥分配机制的基础上，提出了一种基于分组访问控制的4级密钥分配算法。
To create a grouping set at another slice of the cube model, create a new grouping set that includes, at a minimum, the level key attributes of each level in the new slice.
要在多维数据集模型的另一个切片上创建分组集，应该创建一个新的分组集，其中至少要包含新切片中每一级的级键属性。
The similarity principle used in grouping is the key element of the derivative CAPP system, the grouping results is reasonable effects on the valid working of the derivative CAPP system.
利用零件的相似性原理对零件分组是派生式CAPP系统的重要内容，对零件的分组是否合理，直接影响到派生式CAPP系统能否正常运行。
If more than one column is aggregated using the same grouping key or without a grouping key, then all the aggregations are computed within the same operation with a single pass over the data.
如果利用相同的分组关键字或者没有分组关键字，来聚合多个列，那么，所有的聚合都在单个数据传递中的相同操作中进行。
In this paper, through analyzing the advantages and security of RSA encryption system and chaotic encrypt, a new grouping double-key cryptogram scheme is presented.
在分析了RSA公钥加密系统和混沌加密各自的优点及其存在的安全问题的基础上，提出了一种新的分组双密密钥密码方案。
The writer holds that the key to sentence group teaching is to correctly understand its nature, to tell pupils the functions of basic elements of a sentence group, and to provide them with the techniques of sentence grouping.
本文认为语段教学的关键是把握语段教学的性质，使小学生掌握语段的基本要素及其作用，明确语段的基本要求和方法，掌握连句成段的方法。