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Though with the rapid development, there remains a challenge on achieving high performance of I/O virtualization. The Para virtualized I/O driver domain model, used in Xen, provides several advantages including fault isolation, live migration, and hardware independence. However, the high CPU overhead of driver domain leads to low throughput for high bandwidth links. Direct I/O can achieve high performance...
The necessity of lowering the execution of system tests' cost is a consensual point in the software development community. The present study presents an optimization of the regression tests' activity, by adapting a test cases prioritization technique called Failure Pursuit Sampling-previously used and validated for the prioritization of tests in general-improving its efficiency for the exclusive execution...
Digitalization has brought a tremendous momentum to the healthcare research. Recognition of patterns in one protein, which are similar to a functional site of another, is crucial for identifying possible functions of newly discovered proteins, as well as analysis of known proteins for previously undetermined activity. PROSITE is a comprehensive database which describes protein domains, families, functional...
The popularization of the Web and the advent of new information and communication technologies of mobile devices make possible new aspects for management, interaction and information sharing. In petroliferous area, monitoring systems on mobile devices have been used for process optimization, data monitoring, reporting, alarm generation and identification of failures in real-time on oil wells platforms...
Real world problems don't always come with sufficient, complete, and precise data; classical algorithms are facing some limitations like inefficiency of handling imprecise data or uncertain information. Therefore there is a need for finding powerful techniques to handle such situations. The main objective of this research is to introduce a new version of ant algorithm that can solve the problems,...
Commercial services for provisioning software components and virtual infrastructure in the cloud are emerging. For customers, this creates a multitude of possibilities for outsourcing part of the IT-stack to third parties in order to run their applications. These possibilities are associated with different running costs, so cloud customers have to determine the optimal solution. In this paper, we...
Reliable detection of primary user activity by spectrum sensing is a crucial issue of cognitive radio systems. The objective of cooperative spectrum sensing is to combine the detection results of multiple cognitive radios in order to maximize the probability of detecting unused spectrum while meeting a required reliability of detecting primary user activity. In this paper, a Kullback-Leibler distance-based...
According to the structure of beam components of bridge type five axis linkage gantry machining center model TH58, three-dimensional solid models were established and meshed by ANSYS software. Using component analysis from the model analysis theory, the finite element models were analysised on static force, vibration model and harmonic response analysis. As a result, beam components structure has...
Dependency resolution (DR) uses a component's explicitly declared requirements to calculate systems where all dependencies are satisfied. There can be many configurations to choose from when resolving dependencies. DR should aim to identify and return an optimal component configuration. This becomes a significant challenge when diverse and sometimes conflicting criteria such as user preferences, contextual...
The design of embedded systems is often subject to strict requirements concerning various aspects, including real-time performance, power consumption and die area. For mobile devices especially, power consumption is often the most important issue. In order to meet these requirements an adequate system architecture needs to be designed and the embedded software needs to be optimized. For complex applications,...
It is well known that the barycentric rational Hermite interpolants offer the advantages of the numerical stability, no poles, no unattainable points regardless of the distribution of the points. The barycentric rational Hermite interpolant is determined while weights are given. It is the key issue how to choose weights so that the interpolation error is the minimum value. The optimal weights are...
The constraints to manage in a telecom splitter design are numerous and according to a given splitter structure, the choice became difficult. The paper proposes a software tool allowing the design of such filters. This one carries out the modelling of the electrical circuit configurations, and creates the corresponding computation code, used for simulation or optimisation. The methodology is detailed...
Motivated by the demand and the low utilization of spectrum resource, cognitive radio appears as an alternative for the present spectrum distribution policy. Spectrum sensing is the key procedure and energy detector is the most commonly used algorithm in spectrum sensing. The communication signal often varies by time, which causes the spectrum sensing to be inaccurate. In this paper, we use window...
This paper deals with the issue of self-modifying code and packed programs, a long-standing problem commonly addressed by emulation techniques and memory dumps. We propose an original semantics-based approach to simplify dynamic code analysis, by using compiler optimization techniques to get rid of code-generating instructions. For this, we use classic slicing techniques to identify code dependencies...
Malware signature detectors use patterns of bytes, or variations of patterns of bytes, to detect malware attempting to enter a systems. This approach assumes the signatures are both or sufficient length to identify the malware, and to distinguish it from non-malware objects entering the system. We describe a technique that can increase the difficulty of both to an arbitrary degree. This technique...
This paper describes a graphical method for the optimization of Quadrature Voltage Controlled Oscillators (QVCOs) based on the coupling of two LC-tank VCO. A three-dimensional phase noise analysis diagram and graphical optimization approach is presented, to optimize QVCO phase noise while satisfying design constraints such as power dissipation, tank amplitude, tuning range and start up condition....
Psychoacoustic models are the key element of MUSIC-AM audio encoding, and its DSP implementation involves a lot of computations. So whether the real-time audio encoding can be implemented using DSP mainly depends on the execution time of psychoacoustic models algorithm to a large degree. In this paper, we give a brief introduction of psychoacoustic models at the first, and then discuss its implementation...
The existing RP(rapid prototyping) related software include a CAD module, a data processing module, and a monitoring and controlling module, which are independent of one another. Aiming at the issues above, this thesis picks-up the interior topological and geometrical information of model expressed in the boundary representation (B-Rep) using the development tools of ObjectARX and MDT(Mechanical Desktop)...
Integrated from the three articles on Vague plan, the paper advanced the Vague plan optimization algorithm, which proposed the definition of the transforming formula from the single data to Vague data, and also put forward two transforming formulas from the single data to Vague data, and proposed one similarity measure formula among one Vague set. The two formulas are the basic foundation of the Vague...
Parameter self-optimizing sampling is a method of software synchronization. This paper further investigates correcting parameter self-optimizing on the basis of sampling parameter self-optimizing, analyzes its application in harmonic measuring. Using mountain-climb searching and the algorithms of traversal frequency points, it finds the sampling number N, the alternation Ts. The optimizing sampling...
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