Based on the characteristic of the instantaneous power in instantaneous reactive power theory,a improved harmonic detection method-digital integral filter is proposed.

Adjusting the mathematics model of INS/DVL, can increase the stabilization of INS/DVL's longitude and limit the radiation of longitude, and the integral filter precision of INS/DVL is improved.

Chapter 2 discusses the principle of PLL (Phase Locked Loop). The emphasis is placed on the analysis of two orders PLL adopting active proportion integral filter.

This paper presents a zerotree quantization coding scheme based on wavelet transform with lifting scheme,which implements wavelet transform by combining lifting scheme with integral filter,makes the best use of distribution feature of the wavelet coefficients within the coding process,and adopts the embeded zerotree wavelet coding scheme.

According to the disadvantages above,the experimental research is done to obtain an integral filter which can be used in the flow rate range of 80～140m~3/h.

Integrity testing sterilizing filters before use monitors filter integrity prior to batch processing, preventing use of a non-integral filter.

This paper discusses the capture bandwidth of the phase-locked loop using the phase plane method. The phase-locked loop consists of sinusoidal phase comparator, nonlinear ratio-plus-integral filter, and voltage-controlled oscillator (VCO). In the discussion, the practical saturating nonlinearity of the VCO was considered. From this work was derived the general relation between the capture bandwidth and the coefficient of non-linearity of the filter, and that of time constant of the filter and...

This paper discusses the capture bandwidth of the phase-locked loop using the phase plane method. The phase-locked loop consists of sinusoidal phase comparator, nonlinear ratio-plus-integral filter, and voltage-controlled oscillator (VCO). In the discussion, the practical saturating nonlinearity of the VCO was considered. From this work was derived the general relation between the capture bandwidth and the coefficient of non-linearity of the filter, and that of time constant of the filter and the coefficient of non-linearity of the VCO. Its several special cases were discussed, and experimental results given. These results accord with the theoretical analysis fundamentally.

The pseudo-velocity log, or seismic approximate impedance log (SAIL), is an approximate solution to the inverse problem of a seismogram. It is a method for strati-graphic interpretation. So far, the methods applied in SAIL are all based on linear model in which each seismic trace must be expressed by convolving a seismic wavelet with a reflection coefficient sequence of a stratified medium. In this way, it is difficult to consider the effects as resulted from transmission coefficient and multiple reflections....

The pseudo-velocity log, or seismic approximate impedance log (SAIL), is an approximate solution to the inverse problem of a seismogram. It is a method for strati-graphic interpretation. So far, the methods applied in SAIL are all based on linear model in which each seismic trace must be expressed by convolving a seismic wavelet with a reflection coefficient sequence of a stratified medium. In this way, it is difficult to consider the effects as resulted from transmission coefficient and multiple reflections. From the viewpoint of wave theory, a non-linear model must be used in order to comply with physical laws. An important difference between a non-linear model and a linear one is that in the former, the reflection coefficient sequence must be replaced by a reflection transfer function expressed as an autoregressive component and a moving average component.In the non-linear model, the deconvolved seismogram Q(z) resulted from wavelet processing in SAIL is quite different from the reflection coefficient sequence #N(Z), sinceunless under the distortionless condition #=#', where # and #' are parameters for the statistical characteristics of velocity distribution in a stratified medium; N is the two-way time "depth" and rt is the reflection coefficient. In all other cases, distortions appearing in the inversion processing are inevitable. Therefore, the integral filtering operation performed in SAIL yields a simple relation between the relative velocity Vt+1/V1 and its true value vt+1/v1,Vt+1/V1=K2(vt+1/v1),t=1,2,#,N. where Kt is a distortion factorAnalyzing the distortion factor, we may conclude that distortion in SAIL depends upon not only the velocity distribution but also the characters of layer in the sedimentary section and the time length of seismic traces. In order to attain the distortionless condition Kt=1,t#1, the length (M-m) of the trace near a known borehole should be taken as long as possible since there is actually always a case for N >(M-m).

This paper proposes both the improved Fourier algorithm and differential equation algorithm. A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset on impedance calculation is cancelled. In the mean- time,a method of "Changeable Data Window" is advanced. The response time ts decreased remarkably, meanwhile the perfect accuracy is maintained. The differential equation algorithm is also examined and improved in this paper. The scheme using trapezoidal approximation...

This paper proposes both the improved Fourier algorithm and differential equation algorithm. A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset on impedance calculation is cancelled. In the mean- time,a method of "Changeable Data Window" is advanced. The response time ts decreased remarkably, meanwhile the perfect accuracy is maintained. The differential equation algorithm is also examined and improved in this paper. The scheme using trapezoidal approximation to the integral terms and a compensation coefficient are adopted, which decreases the error of X by 2%. The method of simnlating analog filter with digital filter is applied to analyse the R, X error o f the scheme and relevant counter-measure is taken. These improved algorithms were examined on a minicomputer DJS-131. The real time program was compiled and tested on a microcomputer INTEL-8086. The results are satisfactory.