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Privacy protection in cloud computing environment has become the key to the rapid development of cloud computing, until now more researches have being placed on preserving methods of privacy, but less on filtering and preserving them efficiently. A two-stages filtering model is designed in this paper to solve the problem. The privacy filtering and processing methods are designed correspondingly. The...
Data replica selection is an important issue in the cloud storage system, which has been widely studied. The local cache file is an effective method to reduce the file request time. To solve local cache methods' superabundant consumption of hard disk space and tackle user's various QoS preference, we proposed a dynamic intelligent replica selection algorithm (named 2PhaseEnhencing algorithm) which...
The convex combination of two momentum term based algorithms with different momentum factors is an effective solution to highlight the tradeoff between convergence rate and steady-state error of a blind source separation system. As the smoothing factor is chosen in the range from 0 to 1, however, the performance of this convex combination is restricted. In this paper, a novel variable smoothing factor...
The nonlinear principal component analysis (NPCA) can be applied to solve the blind source separation (BSS) problem. By combining the optimum step size with the optimum momentum factor both derived by the decrement of the cost function of NPCA algorithm, an integration fast NPCA algorithm is proposed in this paper. Simulation experiments proved that the proposed algorithm is superior to other NPCA...
In this paper we research on the run time characteristics of non-magnetic hydraulic navigation simulator and approach a corresponding control strategy. Since the simulator is designed to be non-magnetic, it consists of long hydraulic pipes separating electric part and mechanical part to avoid the magnetic interference from electric part. Meanwhile the mechanical part is made of non-magnetic materials...
The traditional RTI is limited in the following aspects. First, it merely runs in the Local Area Network (LAN) or Virtual Private Network (VPN) rather than Wide Area Network (WAN). Second, it does not support the interoperation over the different platforms. The development of web service based RTI is becoming a hot spot of p resent research. By analyzing the merits and drawbacks of the three methods...
At present, with rapidly development in the information technologies and intelligent methods t, it promotes the standardization and construction of industry in various sectors and fields of application. As empirical medicine, the theory of TCM lacks standardization and normalization. So the theory of TCM cannot state accurately and reason scientifically, and the services platform of TCM both for the...
To detail a simulation scenario markup language based on XML and its resolving method. A set of heterogeneous simulation scenario data exchange rules is designed and generation method of the rules is proposed. Based on the data exchange rules, a exchange algorithm of database to RSML or RSML to database is designed.
In this paper, a novel optimal watermarking scheme based DWT and QR decomposition is presented. Before embedding the watermark, information was firstly encrypted to enhance the security and robustness. Then LL subband is blocked 8×8 after DWT transformation. When each of them is QR decomposed, the watermark is embedded in the first row elements of R matrix. The experimental results show that the algorithm...
Research and development of simulation system is related to strategic, geography, computer, virtual reality and other technology, which requires a lot of manpower and material resources. Simulation system developed in ifferent technology can interoperate easily through HLA, and different systems or components will rebuild many different distributed simulation system. The distributed drill simulation...
There aren't complex business processes, but there is a lot of data which should be shared among the applications of middle or small enterprises. According to the principle and norm of SOA and ROA, the application architecture is built to fit this situation, in which the resources and their basic operations are packaged to Web Services, and a framework is used to invoke Web Services dynamically. The...
Network processors employ a multithreaded, chip-multiprocessing architecture to effectively hide memory latency and deliver high performance for packet processing applications. In such a parallel paradigm, when multiple threads modify a shared variable in the external memory, the threads should be properly synchronized such that the accesses to the shared variable are protected by critical sections...
To improve the performance of extra-low speed in direct torque control (DTC) system, this paper applies wavelet neural network (WNN) to constitute flux observer by deep researching nonlinear mathematic model of stator flux of asynchronous motor. Furthermore, in order to improve rapidity and real time characteristics of wavelet neural network flux observer, the paper applies ant colony algorithm (ACA)...
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