相比于非相干消色散,相干消色散具有色散消除更彻底、可保留原始数据相位、时间分辨率信息等优势,但同时具有运算量大、数据处理耗时长等问题。为实现脉冲星基带数据相干消色散处理,对数据处理流程进行加速,开发一种以DSPSR(digital sig...相比于非相干消色散,相干消色散具有色散消除更彻底、可保留原始数据相位、时间分辨率信息等优势,但同时具有运算量大、数据处理耗时长等问题。为实现脉冲星基带数据相干消色散处理,对数据处理流程进行加速,开发一种以DSPSR(digital signal processing software for pulsar)和GPU(graphics processing unit)为数据处理核心的脉冲星数据处理技术。利用高速共享内存实现对环形缓存区两路极化基带数据的读取,结合图形处理器高性能计算技术,使用DSPSR对基带数据进行相干消色散处理。数据处理结果表明,相比于多线程非相干消色散系统,此数据处理技术在数据处理速度方面具有更好的优越性,并可获得更精细的脉冲轮廓。展开更多
Based on the manufacturing method now used in our country,caused low bear- ing capacity in the bolt-end,which is a potential danger in the bolt supporting tunnel and a waste of money,and presented the new type strong ...Based on the manufacturing method now used in our country,caused low bear- ing capacity in the bolt-end,which is a potential danger in the bolt supporting tunnel and a waste of money,and presented the new type strong steel big-end bolt can solve this problem.Analyzed the active state of the end of bolt by ANSYS,we can know that it is very disadvantage when bolt bore eccentric load.Contrasted with the different that com- mon bolt and big-end bolt when they bore the same loading.The common bolt is bigger than the big-end bolt in stress value.Study on the processing technic of the new type of the strong steel big-end bolt,the new metal big-end bolt was produced by heat processing over big-end bolt and upset.From the microscopic examination on bolt metal,it is con- cluded that heat processing on the bolt-end refines the crystal grain of the metal material, which not only increase its extension but improve its property.Moreover the strength ability of the bolt material can be exerted completely.展开更多
Realistic 3D-animation is used in all motion simulation systems of mechanisms and other mechanicals systems. It provides a high-quality illustration of time processes, but it has a weak capability for analysis of thei...Realistic 3D-animation is used in all motion simulation systems of mechanisms and other mechanicals systems. It provides a high-quality illustration of time processes, but it has a weak capability for analysis of their dynamics, for simultaneous display of contact interaction and functioning of mechanisms of different motion types. A spacecraft docking is characterized by a complex contact interaction of docking assemblies with mechanisms and devices of different motion types. Integration and time synchronization of the animation, plots and numerical values greatly facilitates the understanding of dynamics features of these processes. Usage of simple wireframe graphical models allows displaying all contact points. A changing of the set of graphical elements focuses attention on major events of a simulated process. Graphical models developed with consideration of these features and used for spacecraft docking simulation analysis are called dynamic diagrams and described in this paper.展开更多
文摘相比于非相干消色散,相干消色散具有色散消除更彻底、可保留原始数据相位、时间分辨率信息等优势,但同时具有运算量大、数据处理耗时长等问题。为实现脉冲星基带数据相干消色散处理,对数据处理流程进行加速,开发一种以DSPSR(digital signal processing software for pulsar)和GPU(graphics processing unit)为数据处理核心的脉冲星数据处理技术。利用高速共享内存实现对环形缓存区两路极化基带数据的读取,结合图形处理器高性能计算技术,使用DSPSR对基带数据进行相干消色散处理。数据处理结果表明,相比于多线程非相干消色散系统,此数据处理技术在数据处理速度方面具有更好的优越性,并可获得更精细的脉冲轮廓。
文摘Based on the manufacturing method now used in our country,caused low bear- ing capacity in the bolt-end,which is a potential danger in the bolt supporting tunnel and a waste of money,and presented the new type strong steel big-end bolt can solve this problem.Analyzed the active state of the end of bolt by ANSYS,we can know that it is very disadvantage when bolt bore eccentric load.Contrasted with the different that com- mon bolt and big-end bolt when they bore the same loading.The common bolt is bigger than the big-end bolt in stress value.Study on the processing technic of the new type of the strong steel big-end bolt,the new metal big-end bolt was produced by heat processing over big-end bolt and upset.From the microscopic examination on bolt metal,it is con- cluded that heat processing on the bolt-end refines the crystal grain of the metal material, which not only increase its extension but improve its property.Moreover the strength ability of the bolt material can be exerted completely.
文摘Realistic 3D-animation is used in all motion simulation systems of mechanisms and other mechanicals systems. It provides a high-quality illustration of time processes, but it has a weak capability for analysis of their dynamics, for simultaneous display of contact interaction and functioning of mechanisms of different motion types. A spacecraft docking is characterized by a complex contact interaction of docking assemblies with mechanisms and devices of different motion types. Integration and time synchronization of the animation, plots and numerical values greatly facilitates the understanding of dynamics features of these processes. Usage of simple wireframe graphical models allows displaying all contact points. A changing of the set of graphical elements focuses attention on major events of a simulated process. Graphical models developed with consideration of these features and used for spacecraft docking simulation analysis are called dynamic diagrams and described in this paper.
