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The $\alpha $ -$\eta $ -$\kappa $ -$\mu $ model was recently proposed as a generalized fading and can include all well-known small-scale fading models as special cases. In this letter, we investigate the channel capacity of wireless communications that operate in $\alpha $ -$\eta $ -$\kappa $ -$\mu $ fading channels. More specifically, novel and exact expressions for the channel capacity...
This paper presents an analytical model for analyzing the performance of the TDMA-based distributed reservation protocol for wireless multi-hop ad hoc networks. A novel three-way handshake process is presented which considers the hold-off and competition process before the transmission of scheduling messages. An explicit expression of expectation of the average delay of the three-way handshake process...
Targeting at providing wireless broadband access in metropolitan area networks, the IEEE 802.16 standard group has established a sub-group to study new protocol. Wireless mesh network (WMN) becomes the research hotspot in communication areas as it can be used to solve "the last mile" problem. To test the performance of IEEE 802.16 MAC protocol, the self-design simulation platform is proposed...
Connectivity is a crucial performance parameter for wireless multi-hop networks, which is affected by factors like the communication radius, the node density as well as the link quality. In this paper, we solve the critical communication radius problem in wireless multi-hop line networks with unstable links. Specifically, we deduce determinate upper and lower bounds of the critical radius, and validate...
Sink mobility has attracted much research interests in Wireless Sensor Networks (WSNs), because it could provide energy saving and reduce latency during data collection. However, the mobile sink node is still a single point of failure in many WSNs applications, thus needs to be particularly protected against adversaries. We propose in this paper a moving strategy for the mobile sink which prevents...
According to a new horizontal moving mechanism called `Side-Wheel Operating Simultaneously', the moving process of the high-speed & high acceleration stacker for starting and accelerating was simulated and analyzed with multi-body system method. The result showed that the stacker is able to accelerate stably and fast with the designed maximum acceleration and speed.
The structure composition of the Machine Gun Remotely-Operated Weapon Stations servo control system was analyzed, and servo system was simplified and model was assumed. The virtual prototype model was set up by means of ADAMS software package, and servo system model was built based on ADAMS and MATLAB/Simulink; Simulation analysis for tracing precision was conducted in the process of firing, tracing...
Around the simulation and experiment of the drilling process of the high manganese steel, the method to set up model and relevant theories has been studied in simulation course. Utilize plastic forming finite element software, material model of high manganese steel and geometric model have been built. The drilling processing of the high manganese steel has been simulated, continuous chip and the data...
Based on the principles of System Dynamics, this paper discusses the causes of the bullwhip effect and possible approaches to controlling it, from the perspective of the dynamic mechanism of the supply chain. This paper takes as example the beer game, each outcome of which show a surprisingly similar bullwhip effect, regardless of who plays the game and when. The only explanation of this is the unstable...
Rationalization of the Production logistics system can reduce logistics costs and lower product costs. In current, experience and analogy-based approach is still the main way enterprise planning scheme for logistics system. Petri net is an important tool for discrete event system analysis. Papers proposed method which modelling and simulation of plant logistics system based on timed colored Petri...
The traditional error control coding of channel has no long satisfied the requirement of the deep space communication, because of the long delay, great error rate, probability of packet loss, links easily interrupted and so on. The Fountain codes, used in deep space communication, has been introduced and analyzed. The coding and decoding process of LT codes of Fountain codes has been introduced and...
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