Improved index mechanism of moving objects in traffic network 一种改进的基于交通网络的移动对象索引方法
Design and simulation of globoid cam indexing mechanism based on pro e 装置中弧面凸轮分度机构设计与仿真
Fingerprint classification provides indexing mechanism for a large fingerprint database 指纹分类技术为大型指纹数据库提供了一种重要的索引机制。
The classification scheme will build indexing mechanism in the fingerprint data base so that we can perform fingerprint recognition more quickly 其主要目的是方便大容量指纹库的管理,并减小搜索空间,加速指纹识别过程。
Referring the multi - channel data broadcast and the index mechanism of single broadcast , we improve the data broadcast algorithm and put forward an adaptive multi - channel data broadcast algorithm 文章结合了多通道数据广播和单通道广播的索引机制,对数据广播算法进行了改进,提出了自适应的多通道数据广播算法。
In order to improve the efficiency of spatio - temporal data access , spatio - temporal index mechanisms should considers both characteristics of spatial and temporal and combines both access methods of spatial and temporal 时空索引技术是空间索引技术和时间索引技术的结合,它必须兼顾了时空对象的空间特性和时间特性,才能有效地提高时空数据库的存取效率。
Due to this alarm contact it is not only possible to achieve an extremely reliable control of pressures in various production equipments or in the energy production , but also these indexing mechanisms directly integrated in the high pressure gauges make the controlling of pressures in almost all conceivable technical facilities possible 有了警报接点,不仅能在各种生产设备或能源生产中非常可靠的控制压力,而且这些指示装置直接安装在高压压力表里,使该压力表能控制几乎所有的技术设备里的压力。
The dimensional globoidal indexing cam mechanism , as a result of the steady movement , accurate , the transmission ceaseless and is suitable for high speed indexing and precise indexing . now it is the most ideal high speed precision indexing mechanism in the world , and it is being widely applied on each kind of automaton and the production line , this mechanisms prospect of application is broad , arouses the people enormous interest . but the examination of the globoidal indexing cam mechanism is a quite weak link , the manufacturers don ’ t give the examination because of the difficulty of the geometry shape error examination of the cam contour 空间弧面分度凸轮机构,由于运动平稳、准确、传动无间隙而适用于高速分度和精密分度,是当今世界上最理想的高速精密分度机构,正被广泛应用于各种自动机和生产线上,该机构应用前景广阔,引起人们极大的兴趣,而弧面分度凸轮机构的检测是一个比较薄弱的环节,一般生产厂家由于凸轮轮廓几何形状误差检测困难而不予检测,因此本试验台的研制具有极其重要的意义。
In the first place , the paper briefly discusses issues related to the main index mechanisms in spatial and temporal , studies the access methods of spatio - temporal databases which has been presented . furthermore , the paper explains the storage mechanisms in stadbs ( spatio - temporal analysis database system ) and presents a hr - tree index structure based on main memory to realize the index mechanism of stadbs , it ' s main technologies were discussed in detail . lastly , a visual demo of hr - tree based on main memory was introduced in this paper 本文在分析讨论了主要的空间和时间索引技术的基础上,研究、分析了时空数据的存取方法,对已提出的时空索引技术进行了分类、比较;根据时空分析数据库stadbs存储机制的特点,采用基于主存的hr -树作为stadbs时空数据的索引结构,设计与实现了stadbs的时空存取方法,论文对stadbs时空索引机制的设计与实现作了较详细的介绍,同时阐述了基于主存的hr -树可视化演示程序的主要实现方法。