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In order to calculate the time series of source synchronous clock system, it is critical to sort out the full path that clock and data signals pass. Firstly, there is an analysis on relatively simple common clock system and a detailed description about the structure and timing margin of source synchronous clock system. Finally, taking the on board DDR3bus in high-speed circuit, which comes from our...
This paper aims at analysing the change of EMG (electromyogram) amplitude and integral value which is generated from muscles under different loads using time domain and frequency domain analysis method. Finally the EMGFT (electromyographic fatigue threshold) is obtained and the evaluation of muscle fatigue is realized by applying this method. The results show that this method can carry on the preliminary...
The EOG (Electro-Oculography) signal is disturbed by noise and baseline drift, which make it more difficulty to be recognized. In this research, a new algorithm based on mathematical morphology filtering method was proposed to reduce interference from noise and baseline drift. After de-noising, the 5 types of eye movements can be recognized well by threshold detection and average recognition accuracy...
PCI Express (PCIe) interface is widely used in current computer systems. In this paper, two 3D FEM modeling methodologies are introduced for the interested complex connector structure in the frequency domain. The PCIe Gen1 and Gen2 compliance measurement shows good agreement between simulation and measurement in the time domain. The study shows that 3D modeling is very important for PCIe Gen1 and...
This paper describes the use of Wavelet Transform interferences rejection in ECG, pulse signals to eliminate baseline drift, power-line interference and muscle electricity, and then based on wavelet singularity theory in electrocardiograph signal to R-wave, QRS complex width T-wave amplitude is detection and orientation, extract characteristic values. Also extract time domain and frequency values...
For temperature control question in hyperthermia, temperature field is simulated and a two-dimension fuzzy temperature control system is designed. And control algorithm of this system and its realization on FPGA(Field??|Programmable Gate Array) is provided. The optical fiber temperature sensor is used to ensure accuracy of temperature measurement. The results indicated that the fuzzy control can effectively...
This paper systematically introduces the principles of temperature measurement circuits and the structure of temperature measurement based on virtual instrument. The design and simulation are based mainly on Multisim and LabVIEW. The validity of the circuit design is tested. A virtual temperature display instrument is designed by using LabVIEW8. A detailed design process of temperature measurement...
This paper describes the use of ultrasonic detection signal in testing the bonding composite plate material, comprehensive analyses of attenuation coefficient, harmonic amplitude, frequency of echo signals etc., and extracts the signal energy, singular wave peak value and the quantity, analyses the uncertainty of composite plate materials using self-organizing neural network classification algorithm...
Pulse wave of human body contains large amount of physiological and pathological information. Arterial elasticity letdown and arterial stiffness increase is significant marker of cardiovascular and cerebrovascular risk, so a vascular elasticity intelligent analysis system is designed based on LabVIEW. The main function of the system, such as data sampling, waveform pretreatment, feature extraction,...
In the design of high-speed digital circuit, the transmission of digital signal by the differential pair can solve signal integrity issues effectively. Making use of an actual PCB, its signal integrity and “eye diagram” performances were simulated by the HyperLynx software. The high-frequency performance of the PCB was improved, and the potential signal integrity problems were settled. It is proved...
Base on the signal of composite material felting quality in ultrasonic detection, the detection principle of ultrasonic pulse reflection echo method and the transmitting process of ultrasonic in two types of medium that is made by different material are analyzed in detail. Echo signal of detection ultrasonic carries the information of interface felting quality. The fuzzy pattern recognition method...
Recently traffic accidents have frequently happened in mining areas, which people have already paid attention to. Among these accidents, collision accounts for a high percentage. Consequently, the research on automobile anti-collision system in mining areas has become worldwide. In this paper, an anti-collision system in mining areas based on the highly accurate GPS location technology is introduced...
Aiming at denoising to detection signal of the flaw in the long transporting pipe, the way of denoising based on wavelet neural network is present, and signal processing of ultrasonic detection application in long pipeline is described. Making use of self-learning characteristic of wavelet neural network, this way reduces wave loss. This method has the good effect and may acquire exact location and...
Aiming at denoising to detection signal of the flaw in the long transporting pipe, the way of denoising based on wavelet neural network is present, and signal processing of ultrasonic detection application in long Pipeline is described. Making use of self-learning characteristic of wavelet neural network, this way reduces wave loss. This method has the good effect and may acquire exact location and...
This paper introduces the system structure, hardware circuits, control algorithms, and software program of the incubator for premature infant based on LabVIEW. The main advantages of this device are that preheating takes less time than others, the capability of meeting of emergency is provided, control track of temperature and humidity are visible, operation is easy to clinical practice, and maintainability...
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