Advanced Materials Research Vols. 805-806

Abstract: This paper presents a evaluation on existing multicast congestion control schemes. We evaluate several recently proposed schemes to summarize state of the art in this field. Solutions to typical problems in multicast congestion control, especially those in layered multicast, such as layer granularity, loss path multiplicity and receiver coordination, are also studied to motivate further research.

Abstract: The non-homogeneous Poisson model has been applied to various situations, including air pollution data. In this paper, we propose a kernel based nonparametric estimation for fitting the non-homogeneous Poisson process data. We show that our proposed estimator is-consistent and asymptotically normally distributed. We also study the finite-sample properties with a simulation study.

Abstract: The intelligent transportation system just like an experienced traffic police, using a flexible method to optimize the vehicle system control , and also using the network to control the whole system, grasp the overall distribution of the traffic, which requires the integrated use of modern electronic technology and communication technology and other means to achieve. We use a design of the FPGA system on this topic which is a relatively flexible system. On the software side, using the wide used VHDL hardware description language in the programming, then design a countdown timer and a state transition program and so on, using these to achieve real-time control of an intelligent transportation system at the intersection signal lamp. Finally, using Quartus II software platform process the design files and simulation by Cyclone series.

Abstract: In this paper, a predator-prey system with functional response is studied,and a set of sufficient conditions are obtained for the stability of equilibrium point of the system. Moreover, optimal harvesting policy is obtained by using the maximal principle,and numerical simulation is applied to illustrate the correctness.

Abstract: Time-frequency analysis is a powerful tool for analyzing non-stationary signals, which can describe the signals frequency varying with time and provide us the joint information of time domain and frequency domain of the signal. We use a synthetic signal to realize the time-frequency analysis methods of wavelet transform, S transform and Wigner-Ville distribution. Through comparing and analyzing those time-frequency distributions, we propose a new method of integrating wavelet transform and Wigner-Ville distribution. This new method gives a better result than that of wavelet transform and Wigner-Ville distribution and increases the time-frequency resolution.

Abstract: It is very significant for exploring the oil support problems of multi-types aeroplane and enhancing the logistics support capability for an aerodrome by developing the refueling training simulation system. According to the practical requirements of oil support, the design scheme of a simulation training system was proposed and built the system models of requirements and overall hierarchical structure. The key technologies of the virtual reality in system , such as building virtual scene models, optimization of 3D modeling and its animation were discussed in details. And finally, the hardware configurations was given. The initial application shows that the system provides an effective means for the training and study about oil Support of multi-types aeroplane.

Abstract: In order to solve the problem that the traditional cooling system cannot adjust the cooling water temperature to the different operation conditions of diesel engine, the auto-control cooling system is designed. Using it, the coolant temperature can be adjusted automatically by the single-chip which controls the transducer-controlled pump and the electronic dividing valve which replaces the thermostat. We use the thermal equilibrium bench to verify the figures, and the result is show that using the exhaust of generator heats the cooling water can shorten 13 minutes in starting process and the cooling water temperature adjusted automatically to the changing operation conditions of iesel can decrease the fuel consumption remarkably, the highest fuel saving rate reached 5.4%, the averagely fuel saving rate reached 3.6%.

Abstract: In this paper, based on the Laplace transform theory, the conditions for achieving synchronization of different fractional order time-delay chaotic systems are analyzed by use of active control technique. Then numerical simulations are provided to verify the effectiveness and feasibility of the developed method.