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We propose a novel approach for the crowd anomaly detection in multiple cameras with non-overlapping view. In this paper, we refer to the activities of crowd in far-field scenes. Firstly, we present a model for learning all of the motion patterns under single camera view, which are regarded as the normal situation. In the surveillance region, we mark the entrances and exits under the single camera...
The artificial neural network (ANN) has been shown that, is an effect technique used to gain insight into channel equalizer design, to combat nonlinear distortion in wireless communication systems. Also, the joint design of channel equalizer and decoder can provides great advantages for system performance. However, research on the soft output of an ANN-based equalizer still remains largely open. Towards...
Random Early Detection(RED) algorithm of Active Queue Management(AQM) is a well-known link congestion control algorithm. Based on analyzing the linear RED algorithm this paper proposes a nonlinear feedback method of composite curves which used to notify end system congestion state feedback mechanism. When the new mechanism is applied to the queue management process of the router buffer, the result...
Wireless data broadcast is very suitable for delivering information to large user population. In this paper, we concentrate on data scheduling algorithm over multiple channels in mobile computing environments. First, we formulate the average expected delay of multiple channels considering data items' access frequencies, variable length, and different bandwidth of each channel. Second, we propose a...
Cognitive Radio (CR) is a promising technology for dynamic spectrum access with the ability of observing the surrounding environment and adapting itself to the change of network environment. For the problem of spectrum sharing among a primary user and multiple secondary users based on Game Theory, an improved utility function of the second user is proposed. In this function, the influence of the shared...
This paper, beginning with studying the characteristics of the war from a complex system, in accordance with discrete events system modeling and simulation, respectively, from the basic discrete event system specification, as well as the architecture of the models and simulation engine two aspects, researched on modeling method based on DEVS war simulation models of complex systems architecture. Contribute...
Wireless ad hoc networks operation is constrained by energy consumption of every network nodes. To this end, this paper, based on Geographical Adaptive Fidelity (GAF) topology management protocol, analyzes the energy consumption in a rectangular ad-hoc wireless network. Three GAF models for energy efficiency are introduced and discussed: equal-grid, adjustable-grid and genetic algorithm models. In...
Multi-loop closed production systems widely exist in different industries, such as semiconductor assembly and test factory. Measuring the system performance is rather hard because of the complex interaction among the loops, but very important for the design, improvement and control of the production systems. In this paper, we propose an approximation method which is based on the overlapping decomposition...
Using beam wave interaction simulator (BWIS), one module of microwave tube simulator suite (MTSS), a wideband helix TWT has been accurately simulated. The slow-wave circuit parameters are calculated by high frequency circuit simulator.
Research and design to data acquisition process of inertial platform in self-calibration has been carried on in this paper. After overall module design of simulator, based on the analyses of error source during calibration, error models of various components of platform system are introduced and accelerometer and AS (angle sensor) readings generator simulation algorithm are designed in according to...
A new architecture of two-hop-relay variable-rate cellular system was introduced, and the analytical model of this system was built. Then based on this model, we get the average downlink throughput and the call blocking probability of the system respectively. Finally, through numerical calculation, we analyze the impact of the various parameters on the performance of the two-hop-relay variable-rate...
Modeling of facial expression plays a very important role in the research of synthesis and recognition offacial expression. However the current facial expression model can not correctly represent the daily facial expressions. The nature of the facial expressions is analyzed. A qualitative description of the corresponding facial expression space is presented. And then a new facial expression space...
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