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A new spectral analysis method for analog-to-digital converter (ADC) dynamic parameters testing is presented. ADC characterization by spectral analysis has traditionally been done with discrete Fourier transform, which imposes restrictions to optimize results; one of these is coherent sampling. This paper uses resampling methods to change the sampling rate by a noninteger factor and estimates the...
Regarding the cucumber powdery mildew, speckle and downy mildew as examples, the method of image pre-processing for recognizing crop diseases was studied. This paper compared the effect of two filters - simple filter and median filter, and at last we chose median filter to wipe out the disturbance of noise effectively, and two-apex method was applied to separate the disease images from the background...
Based on the individualized requirements of the customers as regards to reasonable diet, diet medication and so on, this article simulates the nutritionist's experience by artificial intelligence, and uses Internet as the technical platform, so as to introduce to customers a scientifically and perfectly structured menu or diet medication plan based on their preference and health status by using actual-time...
The paper describes a four-order delta-sigma modulation (DSM) with 15 levels quantizer which is used in a 24-bit 44.1-kHz sample-rate audio digital-to-analog converter (DAC). An odd level quantizer has been chosen instead of an even level to reduce quantization noise. The noise transfer function (NTF) is designed to have the zeros optimally in order to increase DR. The peak SNR of the DSM is about...
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