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The GMM classifier for pattern recognition has shown increased intention in many applications such as speaker verification and identification. Such classifier requires a large storage and complex processing units but improved in performances. The performances of the GMM and its hardware complexity are analyzed in this paper. FPGA-based hardware implementation of the Log-Add algorithm is presented...
Well-written text must achieve not only the coherent and cohesive logical organization but also the textual consistency of writing style, which is specified not only by genre but also targeted audience and writer's communicative intention and purposes. Any authors, particularly learners, have much difficulty choosing the proper style for their particular writing and detecting style inconsistencies...
The characteristics of reverse logistics make the inventory management issues very complex. Once shortage happens, the reverse logistics network nodes will have insufficient workload even stop work. The previous studies about shortage more established on the assumptions of complete backlogging or complete losing, but the partial backlogging problem is less discussed. So this study develops a partial...
Predicting residual life of cable plays a key role in ship management. In this paper, the Grey Linear Regression Model is used for residual life prediction of shipboard cable under influence of multi-factors. The method is proved effectively by the comparison between the actual aging data and the data acquired by the traditional Arrhenius Equation.
In this paper a fast fingerprint verification method is proposed. In which a smaller sub-region captured in fingerprint image is localized as the matching region. It is vital to detect reference points in the fingerprint image for accurate determining such region in this system. First, a priori knowledge of the complete fingerprint acquired during the fingerprint enrollment process. In the same time...
In smart substation, sampling data will be lost when data frame has been lost or destroyed in transmission progress, which will result in protective action delay or blocked when fault occurs. For this reason, this paper suggests to find the lost sampling data's fitted value and use them to replace the lost sampling data in protective calculation to ensure protection act fast and accurately based on...
Taking the electronic manufacturer Y as an example, this paper uses the stream-flow diagram to discuss the improvement process of such a production system. Based on the theory of lean value and the production process status of this factory, it describes the process with the visualized way and identifies the main kinds of waste. And working out the optimal output of products by the mathematical model...
This paper firstly describes the definitions of stock and virtual organization (VO), then gradually show the importance of inventory management under the environment of VO. Although the classical model of Economic Order Quantity (EOQ) is widely used in the inventory management of traditional enterprises, it's not applicable to VO. As an integrated system composed of two or more traditional enterprises,...
The principle and basic characteristics (no aftereffect and stability) of Markov chain, and the method of statistical forecast analysis of random phenomena were introduced, then s the product market forecasting before the establishment of the supply chain was studied, and a forecastable Markov model about the occupancy rate of market based on the stochastic process of occupancy rate of sale market...
Loss allocation to each user based on fair and justice is the main content of electrical power transmission cost reasonable allocation in Electricity Market. Making use of the uniqueness of Shapley value and distinctive features of shapley theorem, power sources and load are regard as players in a union. That is transform power source to equivalent voltage source and load to impedance based on Thevenin...
This paper simplifies the digital PID on the basis of conventional PID controller. Then, through introducing fuzzy system with a fuzzifier and a defuzzifier, parameters can be fuzzily self-adaptive. This paper puts forward a new fuzzy PID algorithm so that PID controller has the ability to tune nonlinear, real-time, indefinite situations. At last, we utilize a Stone Testing Machine to test side pressure...
Anti-windup saturation compensation schemes in two-link flexible arms are studied. The singular perturbation approach is used to decompose the nonlinear system into a rigid subsystem and a fast subsystem, which allows a composite control design for the original system. A neural network is designed to compensate the saturation nonlinear in rigid subsystem, and a robust controller is employed to attenuate...
In order to understand the pressure effect on water mass fraction in the cathode for the PEM(Proton Exchange Membrane) fuel cell, a model was set up by three conservation equations, and it was considered the Gravity in source item. The modeling domain consists of the membrane, two catalyst layers, two diffusion layers, and two channels. It is simulation of species mass fraction in this paper. The...
After the establishing of lapping trace equation with planet mechanism, based on the simulated trace distribution state, the problems about the lapping trace density were analyzed, and the machining parameters were chosen by the method of numeric calculation, then the objective of lapping the work-piece such as: silicon slice, thin glass sheet etc. uniformly and with high speed can be obtained.
For the problems of parameters disturbance, nonlinear and uncertainty of distribution static compensator (DSTATCOM), this paper studies on sliding mode control based on radial basis function (RBF) network. The fast tracking of DSTATCOM reactive current is achieved by using of RBF neural networks and equivalent sliding mode control. The method has a strong adaptability and robustness for load disturbances...
This paper describes the development and hardware-in-the-loop testing of an Extended Kalman Filter (EKF) for attitude estimation. After literature review, a multi-mode solution to the estimation problem is introduced. It uses the sensor measurements optimally relying on the magnetic and acceleration data on the ground, and magnetic and GPS data in the air. An emergency aerial mode dealing with lost...
This paper introduced a three degree-of-freedom planar parallel mechanism which is composed of three branches. In order to give directions for the following engineering design of the mechanism, the inverse kinematics and forward kinematics of this parallel mechanism are analyzed, which shows that analytical equations for the inverse and forward kinematics of the novel parallel mechanism can be obtained...
This article takes the two-stage screw type solar array which has multi-deployment and lock function as a study object, and simplifies the joint hinge as rotation vice according to the transmission order of multi-deployment and lock joint hinge. Based on the kinematics characteristic analysis of solar array's deployment and the Kane dynamic equation, the dynamics analysis model of solar array's deployment...
In this paper, some traditional methods used to solve complex functional equation were introduced at first, and then an improved ant colony algorithm based on DE operation is proposed. In the following, the algorithm given in this paper was utilized to get roots of complex functional equation, and satisfactory results are obtained. Some key technologies of the mathematical theory and algorithms about...
The behavior characteristics of sorption-desorption kinetics of imazethapyr in soil were studied with the batch equilibrium method, when the slight alkaline soil (Meadow saline Soil) and weak acid soil (Black paddy soil) was used as soil samples which had the similar organic matter content. It was shown that the adsorption and desorption of imazethapyr in soils can almost achieve equilibrium within...
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