Prior remote attestation may not be suitable to scale to the proliferation of IoT device swarms. To this end, we propose a cooperative remote attestation scheme, which validates the security state and verifies the sys...
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ISBN:
(纸本)9781509013258
Prior remote attestation may not be suitable to scale to the proliferation of IoT device swarms. To this end, we propose a cooperative remote attestation scheme, which validates the security state and verifies the system integrity with the cooperation of neighbor devices. The efficiency of the proposed mechanism is analyzed as a cryptographic protocol and then discussed in terms of security and scat ability.
Channel assignment problems (CAP) are classified as NP-hard. The major challenge is how to assign the limited channels optimally while ensuring that electromagnetic interference is minimized and an acceptable quality ...
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Channel assignment problems (CAP) are classified as NP-hard. The major challenge is how to assign the limited channels optimally while ensuring that electromagnetic interference is minimized and an acceptable quality of service (QoS) is provided. Inefficient channel assignment leads to congestion in mobile networks. This work proposes a scheme that combines the easy convergence ability of neural network and the global search ability of genetic algorithm to address the CAP. The proposed solution to the CAP was tested on Philadelphia standard benchmark problems of frequency assignment and produced a lower call blocking probability at high traffic load thereby proving to be more efficient compared to other schemes.
In this busy and competitive world, though we have a lot of affection with our parents and loved ones, we can not always be with them. The advancement in the field of information technology explores new paths for heal...
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ISBN:
(纸本)9781509044498
In this busy and competitive world, though we have a lot of affection with our parents and loved ones, we can not always be with them. The advancement in the field of information technology explores new paths for healthcare and E-health systems are becoming increasingly popular. The American company Biotelemetry provides healthcare facilities wirelessly to approximately one million patients. It was the first to provide real time heartbeat ECG monitoring, analysis and response to the patients at home or anywhere. In automatic ECG analysis or E-health Systems, The analysis of the ECG wave is done automatically, instead of a doctor so a noisy ECG signal will lead to wrong clinical diagnosis. During data acquisition or transmission, several types of artifacts are embedded in the signal which degrades the signal quality and the signal does not remain faithful for clinical diagnosis. For automatic ECG analysis these artifacts should be suppressed. Many techniques are found in the literature to remove these artifacts like wavelet transform, Neural Networks and Adaptive filters. In this paper we propose novel adaptive algorithm for processing of ECG signal. A single stage adaptive filter can remove only one type of artifact from the ECG because it has only one reference input. The proposed multistage filter can eliminate multiple types of artifacts because of multiple reference inputs so it can be applied to the systems where multiple types of interference are found, provided that the apriori knowledge about the interference is available.
DC-DC converter is an important part of solar microgrid system since it not only boost the output voltage to a level which can be integrated with the distribution grid, but it also smoothens the ripple in the output w...
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Aiming at the disadvantage of slow convergence and low efficiency of genetic algorithm, ant colony algorithm is easy to fall into the local optimal solution. The optimization of PID parameters based on ant colony gene...
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Aiming at the disadvantage of slow convergence and low efficiency of genetic algorithm, ant colony algorithm is easy to fall into the local optimal solution. The optimization of PID parameters based on ant colony genetic hybrid algorithm is proposed. At last, in order to prove the effectiveness and feasibility of the algorithm, in the experiment simulation, the ant colony genetic algorithm The hybrid algorithm is compared with the traditional Z-N method and ant colony algorithm, and the conclusion is given at the end of the paper.
How did the theory and practice of computing interact to generate a new discipline, computer science? Studying the French scene, in comparison with other countries, reveals that in most cases computing developed initi...
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ISBN:
(纸本)9783319472867;9783319472850
How did the theory and practice of computing interact to generate a new discipline, computer science? Studying the French scene, in comparison with other countries, reveals that in most cases computing developed initially as an ancillary technique of applied mathematics, with little awareness of the path-breaking theories of computability elaborated in the 1930s. This was particularly clear in France, where mathematical logic was almost inexistent and disregarded by the Bourbaki group. It was only in the early 1960s that researchers in the emerging field of computing felt the need for theoretical models, and discovered the Turing machine and recursive functions. Simultaneously, an interest for language theories and information structures, fostered by practical projects such as machine translation, converged with issues raised by software development and the nascent theory of automata. The convergence of these diverse intellectual agenda was central in the process of construction of the new discipline.
since there is a problem that commanding communication have different kinds of terminals and the existing system to guarantee voice commanding communication cannot be "one-size-fits-all", this paper, under t...
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since there is a problem that commanding communication have different kinds of terminals and the existing system to guarantee voice commanding communication cannot be "one-size-fits-all", this paper, under the condition that the dispatch terminal is as the relay and the current dispatching system is as the switching system, describes the technical improvement and design to a simple convergence device in terms of its interface and signaling transfer. By controlling and transferring the audios, convergence system can overcome the barriers resulted in by the technical protocols owned by different sound systems, so that the intercommunication and networking application among different sound systems can be available;what's more, guarantee mode of speech communication is simplified and the command efficiency is enhanced. Therefore, the existing communication equipment can be better made use of. After being verified and accepted, it is proved that technical improvement described in this paper can take good effect.
Latent factor (LF) models have proven to be accurate and efficient in extracting hidden knowledge from high-dimensional and sparse (HiDS) matrices. However, most LF models fail to fulfill the non-negativity constraint...
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Latent factor (LF) models have proven to be accurate and efficient in extracting hidden knowledge from high-dimensional and sparse (HiDS) matrices. However, most LF models fail to fulfill the non-negativity constraints that reflect the non-negative nature of industrial data. Yet existing non-negative LF models for HiDS matrices suffer from slow convergence leading to considerable time cost. An alternating direction method-based non-negative latent factor (ANLF) model decomposes a non-negative optimization process into small sub-tasks. It updates each LF non-negatively based on the latest state of those trained before, thereby achieving fast convergence and maintaining high prediction accuracy and scalability. This paper theoretically analyze the characteristics of an ANLF model, and presents detailed empirical study regarding its performance on several HiDS matrices arising from industrial applications currently in use. Therefore, its capability of addressing HiDS matrices is validated in both theory and practice.
Cloud computing is at the peak of its growth at current technological era has injected severe race among top IT companies to expand their offerings in cloud horizon on top of their premise-based solutions. To keep up ...
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ISBN:
(纸本)9781509037650
Cloud computing is at the peak of its growth at current technological era has injected severe race among top IT companies to expand their offerings in cloud horizon on top of their premise-based solutions. To keep up with the rapid market demand enterprise software solution providers as Microsoft, Oracle, Google, Sales Force are aggressively releasing majority of their enterprise solutions under Software as a service (SaaS) module which on the other hand also increasing the security concerns. In context of SaaS where a consumer directly interacts with the cloud application one of the most vulnerable security threats is file upload from the client end, which is an active area of research. This paper aims to provide a single entry and exit principle base application programming interface (API) solution to this low discussed and signification risk imposing area of SaaS. In this paper we describe the security threats to file upload, review a range of protection rules and methods and propose a single entry, single exit principle oriented validation rule based API.
OpenFOAM is a framework of the open source C CFD toolbox for flexible engineering simulation, which uses finite volume method (FVM) in the discretization of partial differential equations (PDEs). The problem solving p...
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OpenFOAM is a framework of the open source C CFD toolbox for flexible engineering simulation, which uses finite volume method (FVM) in the discretization of partial differential equations (PDEs). The problem solving procedure in OpenFOAM consists in equations dicretization stage, equations solving stage and field limiting stage. The best parallelism is limited by the equation solving stage, which contains communications. Compared to FVM, discontinuous Galerkin (DG) method is a high-order discretization method, which can accelerate the convergence of the residuals over same mesh scale and has higher resolution of the flow. Based on OpenFOAM with DG method, the ratio of overhead in equations discretization stage increases, especially when solving Euler equations using an explicit method. The equations discretization stage has a better potential parallelism than the other two stages due to no existence of communication. In this paper, we will analysis the difference of time cost in these three stages between original OpenFOAM and OpenFOAM with DG method. By decoupling these three stages, a hybrid parallel algorithm for solving PDEs is proposed and implemented based on OpenFOAM with DG method. The experimental results show that the simulation time is reduced by 16%, and the relative speedup of the hybrid parallel algorithm is up to 2.88 compared to the original parallel algorithm with the same degree of parallelism.
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