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A methodology is developed to use the fuzzy truth values of preference statements for feasible states in an option prioritization technique in order to rank states within the framework of the Graph Model for Conflict Resolution. Option prioritization ranks states based on the truth values of preference statements, which are compositions of the decision makers' courses of actions joined by logical...
For scheduling services with different features and Qos constraints, this paper proposes a hybrid scheduling strategy, in which delay-sensitive services are granted preemptive priority and non-delay-sensitive services are granted non-preemptive priority. Theoretical analysis verified that preemptive scheme results in longer waiting length of queue.
In real world, there are many uncertain conditions which cannot be absolutely pre-determined or controlled by the decision maker. Then, by the empirical experience in the market behavior, there are no fixed carrying cost rate, interest paid rate and interest earned rate. In this paper, we will extend Chen et al. [1] model with fuzzification in the carrying cost rate, interest paid rate and interest...
This paper illustrates a semi-active handover algorithm on the integrated utilization of RSS and location, according to characteristics of a cellular network and WiFi. While connecting to a cellular network, MS (Mobile Station) is in the passive mode, where BS (Base Station) informs the MS to hand over on the basis of location information. In contrast, MS in the WiFi link chooses the optimal AP (Access...
By using Gaines and Mawhin's continuation theorem of coincidence degree theory, we studied the global existence of positive periodic solutions of a predator-prey diffusive model with ratio-dependence and feedback control. We obtain a set of verifiable sufficient conditions to guarantee the existence of positive periodic solutions of the system, which improve some known results.
In this paper, we study the existence of positive periodic solutions for a predator-prey diffusive system with delayed density restricts and stage structure. One bounded open sets are obtained by using analytic technique and a set of sufficient conditions for this system to have at least one positive periodic solution is obtained. The phenomenon is revealed that when the carrying capacity of prey...
By using a continuation theorem based on coincidence degree, we study the global existence of positive periodic solution of the periodic Lotka-Volteraa food chain model with delays. A set of easily verifiable sufficient conditions are obtained, some new results obtained.
In this paper, we investigate the permanence of a class of Holling III-Tanner predator-prey diffusion system with stocking rate and time delay, the existence positive periodic solution by using Comparability Theorem, Coincidence Degree Theory. We obtain the sufficient conditions which guarantee permanent of the system and existence of the positive periodic solution of the periodic system. Some new...
This paper studies a nonautonomous predator-prey system with two compete prey predated by one predator and infinite delay. By using differential equation Comparability Theorem and Continuation theorem based on Coincidence degree theory, we obtain the permanent and positive periodic solution existence of the system. Some new results obtained.
In this paper, we investigate the persistence of a class environment mathematical model with delays, the existence and the global stability of its global positive periodic solution by using Comparability Theorem, Coincidence Degree Theory and Lyapunov functions. We obtain the sufficient conditions which guarantee the existence of the global asymptotic stable positive periodic solution of the periodic...
In the article we propose a method of improving ITU-T E-model MOS estimate of VoIP call quality. The improvement consists of including the effects of network jitter as measured and distributed in RTCP packets; jitter buffer size at receiver and codec packetization settings as input parameters of E-Model. Our method uses Pareto/D/1/k system for modeling general VoIP input traffic stream interarrival...
The supplementary excitation damping controller (SEDC) has been proven to be one of the most economical and convenient measures for damping of subsynchronous resonance (SSR). SEDC is a supplementary function of regular excitation system. It is necessary to verify the performance of SEDC equipment before field test. In this paper, a verification method and results of one practical SEDC equipment are...
Delay compensation is becoming increasingly important due to time-varying delay characteristics over wireless network employed in WSAN-based cyber-physical control systems. Time-varying delay is hard to measure and compensate for it accurately in real-time. This paper presents a delay compensation technique with smith predictor by exploiting virtually constant delay property achieved by playback buffer...
This paper is concerned with the optimal filter problems for networked systems with random transmission delays, while the delay process is modeled as a multi-state Markov chain which incorporates the data losses naturally. By defining a delay-free observation sequence, the optimal filter problems are transformed into the ones of the standard Markov jumping parameter measurement system. We first present...
In this paper, we first investigate the concept and measuring models of system operational availability, and their limitations. To overcome the limitations of the existing models, we present an instantaneous operational availability model and an average operational availability model, as well as a simulation-based method for evaluating those two models. The distinction between the two models is illustrated...
With the tremendous increase in mobile data traffic, system capacity considerations are no longer the primary and only concern to optimize for in cellular networks. The step increase in utilization of cellular networks not only has shorten the recharging cycle of mobile terminals but has further caused a considerable rise in the operators' energy bill. It has therefore become imperative for the sustainable...
Synthesis of quasi-orthogonal ternary sequences (QOTS) with the specified period and peak-factor values on the basis of power residue classes over GF (p) is presented. The distinctive features of the suggested methodology are: • synthesis is performed by a directed search considering necessary existence conditions of QOTS with the defined parameters; • high-speed performance of the synthesis algorithm...
This paper analyses the queueing systems with batch Poisson arrivals and Generalised exponential (GE)service and gives closed form expressions for performance distributions, such as steady state queue length distribution (q.l.d.), blocking probability and waiting time distribution. The analytical performance expressions provide network engineers and researchers a tool to analysis the queues with batch...
Parallel-prefix computation provides a highly efficient solution to binary addition problem. This paper proposes an advanced design based on parallel-prefix Ling adder. In order to further improve the Ling adder's performance, the preprocessing block and carry propagation block are all optimized to reduce the delay path for sum generation. Experimental results indicate that the proposed adder has...
A fuzzy signal control method for single intersection is presented in this paper. This control method selects queue length as input of the fuzzy controller, sets up the fuzzy control rule base and constructs the vehicular delay model. Simulation experiments are presented to compare the vehicular average delay of fuzzy control with traditional inductive control and timing control under various types...
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