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In this paper, a new BP learning algorithm based on extended BFGS method is presented in order to get the solutions for some learning problems of traditional BP Neural Network, such as the slow rate of convergence and poor stabilization. Introduce the modified Newton descent method to the BFGS method which is used to obtain good variables. The single variable search, which the ordinary BFGS arithmetic...
A set of three-node MOST (Media Oriented Systems Transport) audio system is designed in this work, which adopts the C8051F043 single chip as the controller, and OS8104 chip as the transceiver of network. In sequence, a hardware circuit diagram of the audio node and software procedure diagram of the control node and audio node are shown, realizing the transmission of audio data for three-node MOST...
Personalized information service works for different service mode from users' different needs, to help users obtain resources information quickly, promptly and effectively. Based on `Chinese Sciencepaper Online', users give the weights according to each item of attention degree that is concerned. This article introduces the user attention, to show the tendency when the user make the choice. We combine...
Through analysis the principle of temperature measurement which was based on CCD image sensor, the mathematic model of temperature measurement with image was established. Then according to the character of CCD, the model was amended in bandwidth and gray body assumption. Experimental results show that during their own service of furnace the hit rate with prediction method of the Argon-Oxygen Decarburization...
The paper presents a research on the front-end receiving circuit for processing the modulated laser signal. In order to get an overall understanding of optical filtering, some knowledge about the light collection and the spatial filtering is discussed firstly. Subsequently, to improve the design of front-end circuit, several traditional laser receiving circuits are completely studied, and the advantage...
Problems in the process of machining hi-Cr white cast iron slurry pump were analyzed. The overall PCBN(Polycrystalline Cubic Boron Nitride) cutting tools were selected to cut impeller and sheath of slurry pump at high speed. The flank wear and cutting performance of ceramic cutting tools and PCBN cutting tools in process of high-speed cutting hi-chromium white cast iron Cr26 were comparative studied...
In the process of smelting of iron alloy, the carbon content has been a most important reference to the control of refining end. This article describes the commonly used off-line detection methods about carbon content of hot metal smelting furnace, including chemical analysis and spectrometry, and introduces the on-line measurement principle, measuring devices, and modeling based on the light's intensity...
The development process of solar calorific clothing and its relevant subject fields are stated in the thesis, with respect to the key technical issues of heating and keeping temperature constant to be solved on solar calorific clothing, a kind of double closed loop control system of temperature and voltage is put forward. First of all, the output characteristic of solar photocells is analyzed and...
The essay are based on Lagrangian dynamic analysis method, derived the equations of motion between the inverted pendulum and the rotating arm. In the approximation of a viable system of processing, analysis on which leads to realize a simplified power control law. Through the inputs of the angle of the inverted pendulum angle and angular rate and the trend of the change we can use fuzzy decision-making...
In order to solve the problem that the course and mechanism of acoustic propagation are not clear, we presented the method to calculate the transient scattering acoustic field for underwater object using finite difference time domain (FDTD) method according to Hook's law and Newton's second law. The transient scattering field for circular shape object in the incidence of plane wave was simulated,...
In allusion to the character of aircraft orientation error in inertial navigation system increasing with its working time and error accumulation, airborne image aided navigation system is imported in inertial navigation system to combine integrated navigation system. To acquire high orientation accuracy and high matching speed a new algorithm based on multi-scale edge detection and generalized point...
In this paper, LPC2200 Series processors and wireless transceiver module nRF905 are used to build the wireless network transmission system hardware platform. The hardware interface and equipment performance of LPC2200 processor and nRF905 are introduced and the design is proposed. The architecture of hardware circuit between embedded processor and wireless module is given, the processor I / O pins...
With the fast development of World Wide Wed, Web-based applications and services should allow user to get the right personalized information quickly and effectively. Collaborative Filtering acts a very important role in web service personalization and Recommender System. In this paper, Hesitation Degree was proposed to improve the accuracy of collaboration filtering both based on item and user, kinds...
Introduced the design and implementation of isolated word speech recognition system with application of the improved dynamic time warping (DTW) algorithm. Experimental results show that the use of the improved DTW algorithm effectively reduces the amount of data to be processed and the recognition time, improved the system speed. The algorithm showed more obvious advantage as the number of speech...
Analyzing an echo signal in time-domain and frequency-domain got a Random pulse position modulation PD Fuze's channel leak, because of the nonlinear receiver in the fuze, which was the theoretical basis of jamming waveform. Numerical simulation verified correctness of jamming mechanism. A conclusion was the fuze could be jammed through channel leak.
In order to overcome the shortage that RTEMS lacks effective software fault-tolerant mechanism, this paper proposes an approach to add a task fault-tolerant module into application service layer. Based on the task scheduling algorithm of RTEMS, the proposed approach achieves fault-tolerant function by arranging the rescheduling time of fault tasks, which can recover the tasks from transient faults...
Fixed point theorems have many applications in economic analysis, optimization, nonlinear programming and engineering sciences. In this paper, the well-known Brouwer fixed point theorem is discussed to a class of nonconvex sets. We modified the homotopy path-following algorithm and hence make the modified method be able to solve Brouwer fixed-point problems easily.
In order to improve efficiency and flow characteristics of booster valve, one kind of pneumatic boost valve was proposed, which makes use of the expansion power, firstly, aiming to the process of pneumatic boosting valves, non-linear differential equations of pneumatic booster valves were set up, using the software MATLAB/simulink for modeling simulation. Secondly, According to the principle of simulation,...
Based on the principle of Pipeline ADC, a 10-bit, 50-MS/s pipeline A/D converter is presented in this paper. Combining with bootstrap circuit and bottom-plate sampling technology, a high linearity on-chip sample-and-hold (S/H) is realized. This ADC is optimized for high static and dynamic performance applications in imaging and digital communications. It operates at 1.2 V power supply and achieves...
Aiming to the fact that it is still difficult to reasonably identify rockburst grades, the method based on Gaussian Process for Binary Classification model is proposed for identifying rockburst grades. According to few learning samples, the nonlinear mapping relationship between rockburst grades and its influencing factors is established by Gaussian Process for Binary Classification model. The method...
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