The admission control scheme is investigated for a FIFO self-similar queuing system with Quality of Service (QoS) performance guarantees. Since the self-similar queuing system performance analysis is often carried out...The admission control scheme is investigated for a FIFO self-similar queuing system with Quality of Service (QoS) performance guarantees. Since the self-similar queuing system performance analysis is often carried out under the condition of infinite buffer, it is difficult to deduce the upper boundary of buffer overflow probability. To overcome this shortcoming, a simple overflow condition is proposed, which defines a buffer overflow occurrence whenever the arrival rate exceeds the service rate. The analytic formula for the buffer overflow probability upper boundary is easily obtained under this condition. The required bandwidth upper boundary with long-range dependence input and determined overflow probability is then derived from this formula. Based on the above analytic formulas, the upper boundaries of the admission control regions for homogeneous and heterogeneous long-range dependence traffic sources are separately obtained. Finally, an effective admission control scheme for long-range dependence input is proposed. Simulation studies with real traffic have confirmed the validity of these results.展开更多
In the last couple of years, social financing costs have shot up in China despite an overall capital abundance and increasing market-based capital allocation. This paper has investigated overall financial cost and cap...In the last couple of years, social financing costs have shot up in China despite an overall capital abundance and increasing market-based capital allocation. This paper has investigated overall financial cost and capital cost ratio as two measurements of financing cost, compared financing costs of different channels, examined the relationship of risk premium, financial repression, interest rate liberalization, and resource occupation versus financing cost, and addressed the problem of high non-manufacturing cost. On such a basis, specific countermeasures have been proposed. The main conclusion of this paper is： The current high social financing costs primarily result from economic structural imbalance. The fundamental solution lies in continuing structural reform and credibility system development to eliminate barriers in the transmission of capital circulation policies such as expanding equity financing, relaxing market access formalities for small and micro financial institutions, and improving the bankruptcy system to give full play to the ＂survival of the fittest＂ mechanism of the market.展开更多
文摘The admission control scheme is investigated for a FIFO self-similar queuing system with Quality of Service (QoS) performance guarantees. Since the self-similar queuing system performance analysis is often carried out under the condition of infinite buffer, it is difficult to deduce the upper boundary of buffer overflow probability. To overcome this shortcoming, a simple overflow condition is proposed, which defines a buffer overflow occurrence whenever the arrival rate exceeds the service rate. The analytic formula for the buffer overflow probability upper boundary is easily obtained under this condition. The required bandwidth upper boundary with long-range dependence input and determined overflow probability is then derived from this formula. Based on the above analytic formulas, the upper boundaries of the admission control regions for homogeneous and heterogeneous long-range dependence traffic sources are separately obtained. Finally, an effective admission control scheme for long-range dependence input is proposed. Simulation studies with real traffic have confirmed the validity of these results.
文摘In the last couple of years, social financing costs have shot up in China despite an overall capital abundance and increasing market-based capital allocation. This paper has investigated overall financial cost and capital cost ratio as two measurements of financing cost, compared financing costs of different channels, examined the relationship of risk premium, financial repression, interest rate liberalization, and resource occupation versus financing cost, and addressed the problem of high non-manufacturing cost. On such a basis, specific countermeasures have been proposed. The main conclusion of this paper is： The current high social financing costs primarily result from economic structural imbalance. The fundamental solution lies in continuing structural reform and credibility system development to eliminate barriers in the transmission of capital circulation policies such as expanding equity financing, relaxing market access formalities for small and micro financial institutions, and improving the bankruptcy system to give full play to the ＂survival of the fittest＂ mechanism of the market.
