The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Interest of covert timing channels is increasing rapidly. A lot of exploitation has been done on the construction of covert timing channels over the internet. But the construction work of covert timing channels is always in laboratory environment. In the real network environment, delay and packet loss influence the transmission quality of covert messages. In this thesis, we introduce evaluation criterion...
Image processing denoising is a very important step, the hot issue is also the current research. Wavelet transform multi-resolution is frequency analysis features, in order to further improve the image denoising quality, improve visual effect, the paper image denoising methods based on wavelet transform, and which points out the further researching directions.
In software security testing, fuzz testing and symbolic execution are two main testing techniques. Fuzz testing finds program bugs by executing the target program with random inputs it generates while monitoring the execution for abnormal behaviors. Though fuzz testing is able to explore deep into a program's state space efficiently, it usually cannot guarantee the code coverage ratio in many situations...
Analyzed the current situation of mobile operation and maintenance management. Detail designed and implemented the mobile operation maintenance management system according to Java EE, SSH framework, Information push technology and Android development etc. It has important practical significance for the future of the work of mobile operation and maintenance management.
A new method based on Latent Dirichlet Allocation (LDA) is proposed to retrieval information in Mongolian. Semantic information is also considered by Mongolian documents when consider relationship between keywords and retrieval documents. This method models Mongolian documents with LDA, parameters are estimated with Gibbs sampling and probability of word is represented, it can mine the hidden relationship...
Due to shortage of time, most of the software organizations are shifting their projects to rapid application development's life cycle. But main problem is that rate of projects failure is increasing day by day. According to Standish group report, success rate of projects is only 16.2%. The main reason of project's failure is poor requirement engineering. The main objective of carried research is to...
The wide variety of devices currently available, which is bound to increase in the coming years, posed a number of issues for the design cycle of interactive Web applications. That couldn't develop user interface with high quality such as usability and user experience. So this paper propose that combine responsive design method with Model-based method. Add responsive model in the FMP(F-Function, M-Model,...
Validation and Verification are necessary in the life cycle of any safety-critical software system. It answers the question of “are we building the right product?” It's very important to be able to decide if its outputs are correct and system meets specifications, failing to do so can result in loss of human lives or huge financial loss. V&V process and its planning must start early in SDLC (Software...
The rapid growth of the Internet users brings on bandwidth bottleneck. Consequently, it is difficult to guarantee the video service quality of the online streaming media platform. This paper mainly introduces the current situation of streaming media platform, analyzes the network performance and the existing problems, and then puts forward the corresponding research scheme. It specifically adopts...
Traditional FCM algorithm has the problems of sensitivity to initialization, local optimal and the Euclidean distance is only applied to handle the dataset of spatial data structure for the super-ball. Hence a semi-supervised Fuzzy C-Means algorithm based on pairwise constraints for the intrusion detection is proposed. The pairwise constraints can be used to improve the learning ability of the algorithm...
This paper proposes a watermarking algorithm for 3D meshes based on local roughness analysis. The proposed method is a robust and partition-based watermarking method. It is composed of two stages: watermark embedding and extraction. During the watermark embedding stage, the input mesh is decomposed into groups corresponding to different values of roughness, which is measured by the Laplacian of Gaussian...
An adaptive beam forming algorithm with antenna array model based on quantum-behaved particle swarm optimization (QPSO) is proposed for improving existent problems of limited beam modulation, unsatisfactory side lobe suppression and poor adaptability. By adjusting beam direction with matrix-weighting, optimizing initial phase and radius of the antenna array, and by tracking user intelligently with...
As flash memory has advantages of high data throughput, high storage density, low power consumption and low cost, it has been widely used in the applications of high speed data acquisition and massive data storage. However, the flash chip generates bad blocks during its service life, which leads to the loss of data. Hence a bad block management in the system of flash memory array is essential to ensure...
Sample adaptive offset (SAO) filter algorithm is introduced by HEVC as a completely new stage to improve video quality. It is located after deblocking filter, adding an offset value to each sample based on the reconstructed data and the original YUV. In order to solve the problem of high computational complexity of SAO, a fast S AO algorithm based on coding unit partition is proposed in this paper...
Simulation data could be generated by various kinds of software and have different format. The associations among simulation files could also be complicated. However, the existing solutions are usually based on fixed built-in object and not easy to extend. Provenance knowledge of simulation files is also neglected in traditional file systems. To solve the problem, this paper proposes a new simulation...
Designers often have difficulty in efficiently reusing and sharing the implicit knowledge in design activities, due to the lack of powerful knowledge management systems. The approach of representation of knowledge plays a crucial role in knowledge management systems. This paper proposed a multi-level knowledge representation ontology (KRO), formalized on three levels, i.e. part level, assembly level...
Software reuse is one of the major research area in component based software engineering (CBSE). It is an area which integrates all the other technical areas like data mining, soft computing, artificial intelligence etc. The major areas which are to be focused in software reuse are classification, clustering, searching, indexing and retrieval of software components. There are many techniques described...
Clinical data exchange across organisational boundary is essential but not straightforward, since it involves a diverse range of systems that maintain not just incompatible data formats but also their autonomy. This is barrier of substantial significance not only to improved care for individuals whereas data sharing is essential to clinical decisions, but also administrative strategies and resource...
Users always wait to be served by Web service in the community. The cost of Web service community is increased due to the users queue up in the community will consumes resources. In this paper we research on setting optional number of Web services in the community in order to make the cost of community be minimum. A solution was proposed based on both theory of queue and marginal analysis method....
Testing is way of insuring quality of the product. Object oriented testing is challenging task. It becomes more intense in integration level when different units interact for proper functioning of system. These Interacting Objects must be in desired state to achieve the required coverage. This can be achieved by generating method sequences. Manually test case generation is a tedious job and in object...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.