It can transform offsets data into control - points data and subsequently build the scenery model of ship with these control points data . the three methods all have their advantages and disadvantages . we select one of them according to the hardware of computer and the precision required 由船体的型值点生成控制点数据，再由控制点生成船体曲面，此三种表达方式各有优劣，根据硬件条件和精确度要求我们可以选择不同的船体曲面表达方式。
We often get the point cloud data of surface by the non - contact measurement method and construct the 3 - demensional model of the point data . then we design the mold and manufacture the entity according as the 3 - demensional model . now this process is one of the developmental trends in the integrated manufacturing field , and it has great value in the engineering 使用非接触测量方法获取曲面的点云数据,利用cad软件对点云进行造型、基于造型进行模具设计,利用cam软件进行制造,是设计制造一体领域的发展趋势之一,有重要的工程实用价值。
According to the calculating methods in the paper , combining converting to cad model , a application is completed using 00d technology , it base on windows 2000 operating system , use vc + + 6 . 0 and opengl three - dimension graph standard as exploiting tools and can dispose the imported point data from outsides and export surface data in system as 3ds form 根据本文所涉及到的计算与模型的转换，以windows2000为操作系统平台，以vc + + 6 . 0为开发工具，结合opengl三维图形标准库，采用面向对象的设计方法完成一应用程序，该程序能够导入测量点数据并对其作相应处理，并将文中曲面数据以3ds的格式输出。
The development of single chips and analyzers at home and that of overseas compared , a kind of pocketable dual - channel and multi - function signal analyzer , based on dsp , are researched with the functions of dynamic analyzer , data logging acquisitor , start - up / coast - down analyzer and dynamic balancer , etc . and the functions data acquisition , storage , display and analysis of vibration signal are validated in practice , high - speed float point data calculation ability , large memory space and simple operation are the characteristics 高性能单片机尤其是dsp功能芯片的采用及用户技术要求的不断提高，使得信号分析仪的功能越来越完善，在比较了国内外单片机和信号分析仪的发展现状后，开发研制了一种基于浮点dsp芯片tms320c32的便携式双通道多功能信号分析仪，兼有动态信号分析仪、巡检数采器、起停车分析仪、动平衡仪等多种仪器的功能。
At the beginning , this paper has some brief dissertation on the basic principle of the dsl and the multimedia data compression , the key technique of sdsl , the transport protocols , and the data transfer system structure based on the twisted - pair . then it gives an analysis of the point - to - point data link protocol ( ppp ) and the real - time transmission protocol in detail , which provide the side - to - side transmission service for audio frequency and video frequency data , and so on based on the these , we developed a multimedia sdsl modem system used to transfer data and phonetic 本文首先对dsl系统和多媒体数据压缩技术的基本原理、 sdsl的关键技术、传输协议以及基于双绞线的数据传输系统的结构进行了简要的论述，并详细分析了点到点的数据链路协议( ppp协议)以及实时传输协议，其为音频、视频等实时数据提供端到端的传送服务。可以向接收端传送恢复实时信号必需的定时和顺序信息，并向收发双方和网络运营者提供qos监测手段。
It is abstracted whole factor information from the corresponding rectangular matrix which is made from many - point data in all dam . with analyzed the interrelation of survey data , it is abstracted the same essentiality variables and is made decentralize complex survey data be simple and whole . therefor , it is revealed the interrelation each other and is analyzed dam survey data , and is served for dam safety monitoring and comprehensive evaluation 从全坝多测点的测值所形成的相应矩阵中提取整体因素信息，分析各观测变量之间的相互关系，归纳出测量本质相同的变量，使分散复杂的观测数据成果简洁化、整体化，从而揭示出事物间的本质联系，进行大坝观测资料的整体分析，为大坝的安全监测和综合评价服务。
Algorithms of curvature estimation and data simplification of scattered point cloud data are studied . local surface curvature properties on scattered - point data are estimated using a parametric quadric surface approximation , and the key step is local base surface parameteration method which resolves parameteration of scattered - point data . an algorithm is presented for simplifying the scattered point cloud data based on curvature restriction 实例表明,本文算法的简化结果既较好地保留了形状特征,同时使点的分布以点云密集的强制保留区为中心,在向附近扩散的过程中逐渐变稀,避免简化后点云的局部过密或局部过稀的情况。
