LTE(Long Term Evolution,长期演进计划),以其卓越的通信带宽、高频谱利用率、可靠的Qos保证、灵活的系统部署、低网络时延成为电信运营商演进网络的首选。目前90%以上的运营商对LTE-TDD或者LTE-FDD表现出不同程度的关注。然而,LTE的扁...LTE(Long Term Evolution,长期演进计划),以其卓越的通信带宽、高频谱利用率、可靠的Qos保证、灵活的系统部署、低网络时延成为电信运营商演进网络的首选。目前90%以上的运营商对LTE-TDD或者LTE-FDD表现出不同程度的关注。然而,LTE的扁平化理念在引入传统网元时受到挑战。依据扁平化理论对LTE核心网中的EIR(Equipment Identity Evolution,设备识别寄存器)和PCRF(策略和计费规则功能)提出一种融合的扁平化演进策略,在系统实验中起到一定降低时延的效果。展开更多
定检中机务人员的疲劳会导致失误、遗忘、错误等人为差错,极大增加了民机发生事故的概率。为有效分析和控制定检中机务人员的疲劳,综合考虑人-机-环因素交互的危害,建立了规范化定量化的安全性分析模型。首先运用功能可变性描述规则(fun...定检中机务人员的疲劳会导致失误、遗忘、错误等人为差错,极大增加了民机发生事故的概率。为有效分析和控制定检中机务人员的疲劳,综合考虑人-机-环因素交互的危害,建立了规范化定量化的安全性分析模型。首先运用功能可变性描述规则(functional variability of rules,RFV)和统一建模语言(unified modeling language,UML)对系统理论过程分析(systems-theoretic process analysis,STPA)方法进行改进,建立定检中机务人员疲劳致因与控制的综合分析模型,识别出定检中可变性指数较高的交互回路,分析出75种疲劳致因并制定出11条疲劳管理规范。最后利用形式化工具对机务人员疲劳影响定检模块这一过程进行演绎,查找制约民航安全的因素,为航空公司持续适航安全性方面提供理论参考。展开更多
This study proposes a recoverable stress testing algorithm （RSTA） for such special devices as compression/decompression card and encryption/deeryption card. It uses a chaos function to generate a random sequence, an...This study proposes a recoverable stress testing algorithm （RSTA） for such special devices as compression/decompression card and encryption/deeryption card. It uses a chaos function to generate a random sequence, and then, according to the random sequence, generates an effective command sequence. The dispatch of command obeys a special schedule strategy we designed for such devices, i.e., the commands are sent according to the command sequence, and the complete commands are put in a buffer for further result check. RSTA is used to test the HIFN compression acceleration card SAICHI-1000. Test results show that RSTA can make the card work continuously and adequately.展开更多
In this letter, on the basis of Frequent Pattern(FP) tree, the support function to update FP-tree is introduced, then an Incremental FP (IFP) algorithm for mining association rules is proposed. IFP algorithm considers...In this letter, on the basis of Frequent Pattern(FP) tree, the support function to update FP-tree is introduced, then an Incremental FP (IFP) algorithm for mining association rules is proposed. IFP algorithm considers not only adding new data into the database but also reducing old data from the database. Furthermore, it can predigest five cases to three cases.The algorithm proposed in this letter can avoid generating lots of candidate items, and it is high efficient.展开更多
This paper proposes a new neural fuzzy inference system that mainly consists of four parts. The first part is about how to use neural network to express the relation within a fuzzy rule. The second part is the simplif...This paper proposes a new neural fuzzy inference system that mainly consists of four parts. The first part is about how to use neural network to express the relation within a fuzzy rule. The second part is the simplification of the first part, and experiments show that these simplifications work. On the contrary to the second part, the third part is the enhancement of the first part and it can be used when the first part cannot work very well in the fuzzy inference algorithm, which would be introduced in the fourth part. Finally, the fourth part "neural fuzzy inference algorithm" is been introduced. It can inference the new membership function of the output based on previous fuzzy rules. The accuracy of the fuzzy inference algorithm is dependent on neural network generalization ability. Even if the generalization ability of the neural network we used is good, we still get inaccurate results since the new coming rule may not be related to any of the previous rules. Experiments show this algorithm is successful in situations which satisfy these conditions.展开更多
张经理偶尔听说微软公司去年刚刚发布的中的Outlook System 2003中的Outlook 2003组件，在防治垃圾．病毒邮件方面功能比较完善，不仅仅能够根据需要定制垃圾邮件保护级别．而且能够创建自己的邮件规则，从而达到防治垃圾邮件和病毒邮...张经理偶尔听说微软公司去年刚刚发布的中的Outlook System 2003中的Outlook 2003组件，在防治垃圾．病毒邮件方面功能比较完善，不仅仅能够根据需要定制垃圾邮件保护级别．而且能够创建自己的邮件规则，从而达到防治垃圾邮件和病毒邮件的目的，那么我们就看看张经理如何通过相应的设置来完成这些工作的。展开更多
文摘LTE(Long Term Evolution,长期演进计划),以其卓越的通信带宽、高频谱利用率、可靠的Qos保证、灵活的系统部署、低网络时延成为电信运营商演进网络的首选。目前90%以上的运营商对LTE-TDD或者LTE-FDD表现出不同程度的关注。然而,LTE的扁平化理念在引入传统网元时受到挑战。依据扁平化理论对LTE核心网中的EIR(Equipment Identity Evolution,设备识别寄存器)和PCRF(策略和计费规则功能)提出一种融合的扁平化演进策略,在系统实验中起到一定降低时延的效果。
文摘定检中机务人员的疲劳会导致失误、遗忘、错误等人为差错,极大增加了民机发生事故的概率。为有效分析和控制定检中机务人员的疲劳,综合考虑人-机-环因素交互的危害,建立了规范化定量化的安全性分析模型。首先运用功能可变性描述规则(functional variability of rules,RFV)和统一建模语言(unified modeling language,UML)对系统理论过程分析(systems-theoretic process analysis,STPA)方法进行改进,建立定检中机务人员疲劳致因与控制的综合分析模型,识别出定检中可变性指数较高的交互回路,分析出75种疲劳致因并制定出11条疲劳管理规范。最后利用形式化工具对机务人员疲劳影响定检模块这一过程进行演绎,查找制约民航安全的因素,为航空公司持续适航安全性方面提供理论参考。
基金the Hi-Tech Research and Development Pro-gram (863) of China (No. 2006AA01Z431)the Giant Project of Zhejiang Province, China (No. 2006C11105)
文摘This study proposes a recoverable stress testing algorithm （RSTA） for such special devices as compression/decompression card and encryption/deeryption card. It uses a chaos function to generate a random sequence, and then, according to the random sequence, generates an effective command sequence. The dispatch of command obeys a special schedule strategy we designed for such devices, i.e., the commands are sent according to the command sequence, and the complete commands are put in a buffer for further result check. RSTA is used to test the HIFN compression acceleration card SAICHI-1000. Test results show that RSTA can make the card work continuously and adequately.
基金Supported in part by the National Natural Science Foundation of China(No.60073012),Natural Science Foundation of Jiangsu(BK2001004)
文摘In this letter, on the basis of Frequent Pattern(FP) tree, the support function to update FP-tree is introduced, then an Incremental FP (IFP) algorithm for mining association rules is proposed. IFP algorithm considers not only adding new data into the database but also reducing old data from the database. Furthermore, it can predigest five cases to three cases.The algorithm proposed in this letter can avoid generating lots of candidate items, and it is high efficient.
文摘This paper proposes a new neural fuzzy inference system that mainly consists of four parts. The first part is about how to use neural network to express the relation within a fuzzy rule. The second part is the simplification of the first part, and experiments show that these simplifications work. On the contrary to the second part, the third part is the enhancement of the first part and it can be used when the first part cannot work very well in the fuzzy inference algorithm, which would be introduced in the fourth part. Finally, the fourth part "neural fuzzy inference algorithm" is been introduced. It can inference the new membership function of the output based on previous fuzzy rules. The accuracy of the fuzzy inference algorithm is dependent on neural network generalization ability. Even if the generalization ability of the neural network we used is good, we still get inaccurate results since the new coming rule may not be related to any of the previous rules. Experiments show this algorithm is successful in situations which satisfy these conditions.
文摘张经理偶尔听说微软公司去年刚刚发布的中的Outlook System 2003中的Outlook 2003组件，在防治垃圾．病毒邮件方面功能比较完善，不仅仅能够根据需要定制垃圾邮件保护级别．而且能够创建自己的邮件规则，从而达到防治垃圾邮件和病毒邮件的目的，那么我们就看看张经理如何通过相应的设置来完成这些工作的。
