针对大数据传输中的数据机密性、完整性和数据丢失等问题,提出一种基于简化数据加密标准(Simplified Data Encryption Standard,SDES)和双轮差错控制的大数据集成安全系统。使用SDES加密算法生成加密字符串,并设计意外数据丢失备份系统...针对大数据传输中的数据机密性、完整性和数据丢失等问题,提出一种基于简化数据加密标准(Simplified Data Encryption Standard,SDES)和双轮差错控制的大数据集成安全系统。使用SDES加密算法生成加密字符串,并设计意外数据丢失备份系统以提高机密性和防止意外数据丢失。基于双轮差错控制以较低的空间开销控制传输过程中包含的任意数量的离散或连续错误位,基于固定长度编码(Fixed Length Coding,FLC)的无损压缩技术来减少数据开销。该算法具有较高的AE值、熵和压缩百分比,具有提供更高的数据机密性和完整性的潜力。展开更多
申威26010高性能众核处理器在多核处理器申威1600基础上,采用片上系统(system on chip,SoC)技术,在单芯片内集成4个运算控制核心和256个运算核心,采用自主设计的64位申威RISC(reduced instruction set computer)指令系统,支持256位SIMD(...申威26010高性能众核处理器在多核处理器申威1600基础上,采用片上系统(system on chip,SoC)技术,在单芯片内集成4个运算控制核心和256个运算核心,采用自主设计的64位申威RISC(reduced instruction set computer)指令系统,支持256位SIMD(single instruction multiple data)整数和浮点向量加速运算,单芯片双精度浮点峰值性能达3.168TFLOPS.申威26010处理器基于28nm工艺流片,芯片die面积超过500mm\+2,芯片260个核心稳定运行频率达1.5GHz.申威26010处理器从结构级、微结构级到电路级,综合采用多种低功耗设计技术,峰值能效比达10.559GFLOPS/W.芯片运行频率和能效比均超过同时期国际同类型处理器.申威26010通过在高频率设计、稳定可靠性设计和成品率设计等方面的技术创新,有效解决了芯片在实现高性能目标中所遇到的高频率目标、功耗墙、稳定可靠性和成品率等难题,成功大规模应用于国产10万万亿次超级计算机系统“神威·太湖之光”,有效满足了科学与工程应用的计算需求.展开更多
The computer numerical control（CNC） system is suited to control varied types of flexible fixtures in aircraft component manufacturing and assembly. The mechanisms and control requirements of flexible fixtures are pr...The computer numerical control（CNC） system is suited to control varied types of flexible fixtures in aircraft component manufacturing and assembly. The mechanisms and control requirements of flexible fixtures are presented and analyzed. The hardware and software architecture and implementation of CNC system are pro- posed. The flexible fixture mechanism is described using configuration parameters. According to the parameters, the CNC system automatically generates the control feature and the human machine interface （HMI） operation function. The CNC system is implemented in a flexible fixture for skin-strlnger assembly, and results show the effectiveness of the system.展开更多
A force control strategy for position controlled robotic manipulators is presented. On line force feedback data are employed to estimate the local shape of the unknown constraint. The estimated vectors are used to ge...A force control strategy for position controlled robotic manipulators is presented. On line force feedback data are employed to estimate the local shape of the unknown constraint. The estimated vectors are used to generate the virtual reference trajectory for the target impedance model that is driven by the force error to produce command position. By following the command position trajectory the robotic manipulator can follow the unknown constraint surface while keeping an acceptable force error in a manner depicted by the target impedance model. Computer simulation on a 3 linked planar manipulator and experimental studies on an Adept 3, an SCARA type robotic manipulator, are conducted to verify the force tracking capability of the proposed control strategy.展开更多
In this paper,we discuss the CDF Run Ⅱ Run Control and online event monitoring system.Run Control is the top level application that controls the data acquisition activities across 150 front end VME crates and related...In this paper,we discuss the CDF Run Ⅱ Run Control and online event monitoring system.Run Control is the top level application that controls the data acquisition activities across 150 front end VME crates and related service processes,Run Control is a real-time multi-threaded application implemented in Java with flexible state machines,using JDBC database connections to configure clients,and including a user friendly and powerful graphical user interface.The CDF online event monitoring system consists of several parts;the eent monitoring programs,the display to browse their results,the server program which communicates with the display via socket connections ,the error receiver which displays error messages and communicates with run Control,and the state manager which monitors the state of the monitor programs.展开更多
文摘申威26010高性能众核处理器在多核处理器申威1600基础上,采用片上系统(system on chip,SoC)技术,在单芯片内集成4个运算控制核心和256个运算核心,采用自主设计的64位申威RISC(reduced instruction set computer)指令系统,支持256位SIMD(single instruction multiple data)整数和浮点向量加速运算,单芯片双精度浮点峰值性能达3.168TFLOPS.申威26010处理器基于28nm工艺流片,芯片die面积超过500mm\+2,芯片260个核心稳定运行频率达1.5GHz.申威26010处理器从结构级、微结构级到电路级,综合采用多种低功耗设计技术,峰值能效比达10.559GFLOPS/W.芯片运行频率和能效比均超过同时期国际同类型处理器.申威26010通过在高频率设计、稳定可靠性设计和成品率设计等方面的技术创新,有效解决了芯片在实现高性能目标中所遇到的高频率目标、功耗墙、稳定可靠性和成品率等难题,成功大规模应用于国产10万万亿次超级计算机系统“神威·太湖之光”,有效满足了科学与工程应用的计算需求.
文摘The computer numerical control（CNC） system is suited to control varied types of flexible fixtures in aircraft component manufacturing and assembly. The mechanisms and control requirements of flexible fixtures are presented and analyzed. The hardware and software architecture and implementation of CNC system are pro- posed. The flexible fixture mechanism is described using configuration parameters. According to the parameters, the CNC system automatically generates the control feature and the human machine interface （HMI） operation function. The CNC system is implemented in a flexible fixture for skin-strlnger assembly, and results show the effectiveness of the system.
文摘A force control strategy for position controlled robotic manipulators is presented. On line force feedback data are employed to estimate the local shape of the unknown constraint. The estimated vectors are used to generate the virtual reference trajectory for the target impedance model that is driven by the force error to produce command position. By following the command position trajectory the robotic manipulator can follow the unknown constraint surface while keeping an acceptable force error in a manner depicted by the target impedance model. Computer simulation on a 3 linked planar manipulator and experimental studies on an Adept 3, an SCARA type robotic manipulator, are conducted to verify the force tracking capability of the proposed control strategy.
文摘In this paper,we discuss the CDF Run Ⅱ Run Control and online event monitoring system.Run Control is the top level application that controls the data acquisition activities across 150 front end VME crates and related service processes,Run Control is a real-time multi-threaded application implemented in Java with flexible state machines,using JDBC database connections to configure clients,and including a user friendly and powerful graphical user interface.The CDF online event monitoring system consists of several parts;the eent monitoring programs,the display to browse their results,the server program which communicates with the display via socket connections ,the error receiver which displays error messages and communicates with run Control,and the state manager which monitors the state of the monitor programs.
