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In order to realize the energy balance of ZigBee, prolonging the survival time of the network, avoiding the paralysis of the network, this paper improves the tree algorithm. This paper firstly introduces ZigBee and the results of some routing algorithms, and then analyzing and comparing the original tree algorithm and AODVjr algorithm, finding out the inadequacies. The original tree algorithm is improved...
This paper is a study of staff issues at the bank, ICBC China. Due to extra and imbalanced staff, the system was idle most of the time. By using the qualitative approach, M/M/s queuing model and discrete event simulation, the staff was sub-optimized. First, observation of the system was conducted and recorded using the existing operations system used by the bank. Arrival time of customers, service...
This paper perfects the simulation model of mass collaborative product development. A new structure of simulation model was presented, and the model considering the participants' learning effect in this paper, which improve the model's reliability. Structure and modeling steps of the simulation were studied, and the model performance under the two different situation "participants learning effect"and...
Evaluation is significant tool for contractor equipment maintenance support construction, and also a primary mean to reflect construction effect objectively and accurately. This paper presents basic theory and methods of System Dynamics at first. Then the elements and structure of contractor equipments maintenance support construction system are analyzed, which is help to describe the control relationship...
The prevention and cure of deadlock of command information system for united combat of multi-troops is the fundamental problem to ensure the safety and the reliability of system, it is also one of difficult problems to be solved. The paper puts up a kind of formal method which describes the command information system—Petri net model, giving an example of setting up intelligent running models of planning...
This paper discuss limitation of multi-ply feedback neural network algorithm, put forward a fast IDS detection algorithm based improved BP algorithm -IBP, new algorithm add a momentum item adopt alterable learn speed policy and batching, simulation with computer proves that choose bigger learning gene can quicken algorithm convergent speed. The modified algorithm has some advantage than traditional...
Because the changing frequency of extreme climate events generally has profound impacts on our living environment, research of the related topic has received much attention in social sciences. Based on the daily data collected from 753 meteorological stations in China during 1961-2005, the present work studies the relationship among some extreme climate indices, that is, FEP(frequency of extreme precipitation),...
Noise is electrical or electromagnetic energy that reduces the quality of a signal. Noise affects digital, analog and all communications systems. This paper introduced a noise analysis method based on Multisim. Multisim creates a noise model of the circuit, using noise models of each resistor and semiconductor device, instead of AC models, and then performs analysis. It calculates the noise contribution...
The three-phase software phase-locked loop is widely used in electronics converters. Because of the difference in the loop filter, the precision and the speed of the phase-locked loop(PLL) have some distinction. This paper designed PI filter for loop filter and PI together with second-order HPF for loop filter respectively. The simulation result indicated that the PI controller have good tracking...
This paper, bases on the trend and seasonal fluctuation of China's monthly railway freight, uses ARIMA model and Holt-Winters model to forecast. After comparison of forecasting results, a final freight result from January to December of 2010 is generated. After verification, the predict results of ARIMA model and Holt-Winters model, with errors lower than 4%, are preferable to be used of railway freight...
It is important to detect defects in wood, when it reduce the performance. The data and signal processing technology providing researchers with more damage identification problem solution ideas and methods. This article explore the wavelet analysis and artificial neural network for the wood defects based on non-destructive testing, and build an artificial neural network model for wood non-destructive...
In this paper, the exoskeleton robot is first briefly introduced, the mathematical model for the upper limb exoskeleton robot and the force and position double-closed-loop control system are discussed. Then the authors discuss the type design of all sectors for the control system, and the various components of the system are given. Lastly, through the use of Matlab's Simulink software, the simulation...
To achieve flexible support for multi-channels supplied by remote monitor system and to implement hybrid transmission mode, this paper designs and introduces a mechanism of data transmitting buffer queue, which is with multiple priorities processing. The mechanism is composed of data input queue facing to upper layer and data output queue facing to diverse communication channels and it contains retransmission...
The strategic focus of enterprises is shifting from the traditional production-centered model to a creation-centered model due to the changes in the manufacturing environment. In order to adapt themselves to the fiercely competitive market environment, more and more enterprises are cutting across the boundary of enterprises to develop new products jointly with other enterprises in the supply chain...
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