According to the retaining structural specialities and engineering case, a simple model of retaining wall and bracing structure is established by interactive principle, base on condition of deformation consistency are retaining wall and bracing structure analyzed by iterative method, the calculating result and real engineering conditions has a good accordance.

The model for the cycle-match of turbine and compressor is established as the equivauentnozzle cross area is known. The experimental coefficient formula of the pressure loss has beenintroduced to the MPC model. In order to avoid solving non-linear equations f_i=0(i=1,2,…,n)Jacobi matrix,the pressure loss function G_2 is used to iterate.

Tikhonov regularization principle is introduced to overcome the instability problem of image reconstruction and ART algorithm is used to improve the image quality of the original reconstructed image.

Iterative operation of this fast K-MEAN segmentation not only decreases the processed data but also to be unecessary to determine its original class centers artificially, and the image segmentation only need simple threshold discrimination.

Based upon basic aerothermodynamics equations for flow in turbomachinery setted up by Prof. Wu, computing supersonic flow past inlet of cascade section on an arbitrary stream filament of revolution was programmed with method of characteristics. The effeets of the variations of the distance between two neighbouring S1 surfaces and the radius were taken into account. In the program, the coefficients used in the calculation are the average values between the two connecting points, obtained after iteration. This...

Based upon basic aerothermodynamics equations for flow in turbomachinery setted up by Prof. Wu, computing supersonic flow past inlet of cascade section on an arbitrary stream filament of revolution was programmed with method of characteristics. The effeets of the variations of the distance between two neighbouring S1 surfaces and the radius were taken into account. In the program, the coefficients used in the calculation are the average values between the two connecting points, obtained after iteration. This convergence rate is fast, and normally three or more cycles of iteration are sufficient for engineering requirement.For simplicity, the shape of the bow wave was taken from that given by W. Moeekel, since it had shown to be ture for supersonic flow of the Mach Number range encountered in the transonic compressor. The supersonic flow field was calculated using preceding equations, till next blade was reached. The values of Mach Number and angle of inlet flow for next blade were determined by interpolation which was made on the two-dimensional neighboring three points. Then, the calculation was extended along the circumferential direction several pitches, with preceding procedure, until the solution of one pitch length. respected itself. The uniform condition far upstream was determined by the use of the set of the equations of continuity, momentum and energy.The relation between variation of inlet flow angle and inlet Mach Number can be obtained. The value of inlet flow angle obtained is then the one corresponding to the unique-incidence for the incoming Mach Number. There were many logical comparision in the program, so that all procedure of calculation can be in progress automatically. The accuracy of the obtained results is high relatively.

This paper deals with the necessary conditions by which a full stressed design can be found while the area of each member does not vanish. The iterative formulas (one load condition) of the elastic energy of structure and the stress ratio of each member are given, and its properties are also discussed.

This paper refers to the problem of asynchronization between satellite position and station position in the observations of artificial satellites.It is proved that the correction in the direction observation for this asynch- ronization is equivalent to the correction of diurnal aberration (from the apparent position to the true position).The formulae of correction for the other observations are also given.With these corrections,We can use the simplest formulae to calculate the satellite ephemerides in improving...

This paper refers to the problem of asynchronization between satellite position and station position in the observations of artificial satellites.It is proved that the correction in the direction observation for this asynch- ronization is equivalent to the correction of diurnal aberration (from the apparent position to the true position).The formulae of correction for the other observations are also given.With these corrections,We can use the simplest formulae to calculate the satellite ephemerides in improving the orbit determination,as if we were dealing with the synchronous observation. There is no iterative procedure and no additional terms to be needed.