This paper addresses the issue of modeling of the hydraulic long transmission line. In its base, such model is nonlinear with distributed parameters. Since general solution in closed-form for such model in time-domain...This paper addresses the issue of modeling of the hydraulic long transmission line. In its base, such model is nonlinear with distributed parameters. Since general solution in closed-form for such model in time-domain is not available, certain simplifications have to be introduced. The pipeline in the paper has been divided to a cascaded network of n segments so that a model with lumped parameters could be reached. For segment modeling, a standard library of bond graphs element has been used. On the basis of models with lumped parameters, the effect of the number of segments, pipeline length and effective bulk modulus on the dynamics of long transmission line have been analyzed.展开更多
This paper presents the closed-form expression to the expected density of progress for wireless ad hoc networks with Nakagami-m fading. The expected density of progress is defined as the expectation of a product betwe...This paper presents the closed-form expression to the expected density of progress for wireless ad hoc networks with Nakagami-m fading. The expected density of progress is defined as the expectation of a product between the number of simultaneous successful transmission per unit area and the distance towards the destination. Numerical results show that the expected density of progress is determined by two factors, terminal density and the probability that a terminal attempts to transmit.展开更多
In this paper, exact outage probability and symbol error rate （SER） expressions are derived in closed-form for dual-hop amplify-and-forward cooperative network over independent non-identically Nakagami-m fading chan...In this paper, exact outage probability and symbol error rate （SER） expressions are derived in closed-form for dual-hop amplify-and-forward cooperative network over independent non-identically Nakagami-m fading channels. In the analysis, partial relay selection is employed. This selection scheme proposed recently is found applicable in different wireless systems such as ad hoc and sensor networks. The results are verified through comparison with Monte Carlo simulations.展开更多
文摘This paper addresses the issue of modeling of the hydraulic long transmission line. In its base, such model is nonlinear with distributed parameters. Since general solution in closed-form for such model in time-domain is not available, certain simplifications have to be introduced. The pipeline in the paper has been divided to a cascaded network of n segments so that a model with lumped parameters could be reached. For segment modeling, a standard library of bond graphs element has been used. On the basis of models with lumped parameters, the effect of the number of segments, pipeline length and effective bulk modulus on the dynamics of long transmission line have been analyzed.
基金Supported by the National High Technology and Development Program of China （No.2007AA10Z235） , the National Basic Research Program of China（No.2009CB320407）, the National Natural Science Foundation of China（No.60872049,60871042,60971082,60972073）, and the National Science Specific Project（2009ZX03003-011）.
文摘This paper presents the closed-form expression to the expected density of progress for wireless ad hoc networks with Nakagami-m fading. The expected density of progress is defined as the expectation of a product between the number of simultaneous successful transmission per unit area and the distance towards the destination. Numerical results show that the expected density of progress is determined by two factors, terminal density and the probability that a terminal attempts to transmit.
基金Supported by the National Natural Science Foundation of China （ No. 60972051, 61001107 ）, the Major National Science ＆ Technology Pro- jects （ No. 2010ZX03006-002-04） and the Project of Natural Science Foundation of Jiangsu （ No. BK2010101 ）.
文摘In this paper, exact outage probability and symbol error rate （SER） expressions are derived in closed-form for dual-hop amplify-and-forward cooperative network over independent non-identically Nakagami-m fading channels. In the analysis, partial relay selection is employed. This selection scheme proposed recently is found applicable in different wireless systems such as ad hoc and sensor networks. The results are verified through comparison with Monte Carlo simulations.
