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In this paper, dynamic matrix control is proposed for the first order inertial system in the presence of measurable and unmeasurable disturbances. A state estimator is designed based on step response model, which is used to estimate the unmeasured state. By means of the basic principle of model predictive control, control law can be obtained eventually. Numerical simulation results are presented to...
With the development of technology, billions of clients visit web servers to surfing on the Internet every day. Insight is a code flow tracing project for web servers. The tracing data in Insight rising with the increasing quantity of web accessing is enormous. JavaScript Object Notation (JSON), a lightweight, text-based, language-independent data interchange format, is used in Insight to transfer...
This paper designs and develops a pipe planning CAD system based on MATLAB and UG software. The geometric information of planning space and terminals are extracted by using UG/Open GRIP. The pipe and cable path planning is conducted using some existing automatic routing algorithms in a MATLAB system, and then the final computation results are transferred back to the UG system for visualization of...
A method for Variable-Speed bearing fault diagnosis is proposed. The new method is based on the analysis of shocking spikes from defect positions. The shocking spikes are detected form vibration signal by an amplitude threshold. The bearing system generates impacts at a constant angle interval. If the shaft speed is variable, the inter-impact time intervals will change accordingly. By measuring the...
Rolling element bearings are among the most common components in industrial rotating machinery. Condition monitoring technologies for bearing fault detection and diagnosis are critical to avoid machines from productivity reduction and emergency breakdown. Acoustic emission (AE) technology which detects the expanding of cracks in the fatigued material is able to monitor bearings before visual defects...
This study attempts to examine empirically the long and short-run relationships between CO2 emissions, energy consumption and economic growth in China using ARDL bounds test Approach for the period 1985–2008. The results indicate that there exist long and short-run relationships between the variables. Energy consumption has a positive impact on CO2 emissions and economic growth affects CO2 emissions...
This paper mainly introduces the design and the function structure of VoIP Flow Monitoring System, providing a complete set of monitoring solution. Different with other system, in the process of design, the system focuses on the web based flow analysis module, and illustrates the solution aiming at monitoring and controlling flow. With plenty of search conditions, the web module is flex and users...
On the basis of introducing the model of Frequency-Domain Blind Deconvolution (FDBD), key techniques in mechanical signal extraction were comprehensively related and analyzed in this paper, which include the methods of suppressing the difference between circular and partial convolution by coordinating the relationship between FFT size and length of each frequency bin or Modified Discrete Fourier Transform,...
A double-sided dual-band bow-tie antenna with two arms printed on top and bottom of dielectric substrate of epsivr=2.2 is proposed to operate at both the CDMA/GSM band ranging from 800 MHz to 960 MHz and the mobile 3G /WiFi/WiMAX band ranging from 1.7 GHz to 2.69 GHz. The two arms of the bow-tie are overlapped to tune the operation band and designed to be asymmetrical for beam tilt. To cover the potential...
Two novel active steganalysis schemes which only use one copy of stego image are presented in this paper. We view active steganalysis as blind sources separation (BSS) problem and can be solved with independent component analysis (ICA) algorithm under the assumption that embedded secret message is an independent, identically distributed (i.i.d) random sequence and independent to cover image. With...
A fault diagnosis method of chemical reactor using wavelet neural network (WNN) is presented. A WNN with three-layer is constructed for fault diagnosis. The activation function of neuron in hidden layer of WNN is constructed by Morlet wavelet function. An improved adaptive BP learning algorithm of adjusting weights of WNN was given. The convergence speed of WNN is faster than the traditional BP neural...
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