In the period from 1993 to 1998 the main thrust of reform in the publishing industry was the "phased shift" in the main characteristics from size and quantities to fine quality and high efficiency.

According to features of CAD/CAM in numerical control technology and apply specialty and several years teaching reform, the reform measures and phased reform achievements on NC courses system, teaching method and practical teaching are systemized introduced in the paper.

In this paper, the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction (UTD) method for analyzing phased array antenna mounted on an airborne platform.

Considering that the setup includes a great number of channels and occupies a large area, the diagnostic facilities ensure the phased testing of the spectrometer components.

We present constructions of cyclic two-dimensional array codes correcting phased and arbitrary rectangular burst errors; their encoding and decoding algorithms are also given.

Analogues of mRNA were phased into the ribosome using binding at the tRNAPhe P-site, which recognizes the UUU codon.

When solving an ion-exchange equilibrium problem it is usually taken into account that the ionite, according to a two-phased model, comprises microphases of a gel and an equilibrium solution.

The paper includes two parts. The first part is a theoretical part, in which the characteristics of holography as applied to detection is discussed, and the notion of "detecting holography" is proposed. The principal difficulty encountered in applying elastic or electromagnetic waves to the earth media is the poor longitudinal resolution of monochromatic holography. Prom the viewpoint of the communication theory and the antenna array theory, the monochromatic holography is examined, and its relations to correlation...

The paper includes two parts. The first part is a theoretical part, in which the characteristics of holography as applied to detection is discussed, and the notion of "detecting holography" is proposed. The principal difficulty encountered in applying elastic or electromagnetic waves to the earth media is the poor longitudinal resolution of monochromatic holography. Prom the viewpoint of the communication theory and the antenna array theory, the monochromatic holography is examined, and its relations to correlation detection, matched filters as well as phased array anteenas are illustrated. Multifrequency synthetic detective holography is developed as a possible approach to the solution of longitudinal resolution problem. Its principles are discussed, its relations to the "impulse holography" and the formulas for the longitudinal resolution are deduced. Finally, examples of two-dimensional computer simulation are presented to illustrate the feasibility of the method.The second part is an account of experiments made in water-tank for the microwave multifrequency synthetic detecting holography. The results of computer reconstruction using interference-type holograms give evidence to prove the high resolution and good imaging quality of the method.

"Blind spots" is a well known phenomena occuring in the operation of the phased array "blind spots" means total reflection of input power Either of two conditions leads to total reflection, null of the radiation resistance or infinity of the admittance. This paper is to investigate these conditions. Through detail mathematical analysis, it is concluded that the null of the radiation is the only reason to cause total reflection i.e. ''blind spots" . Besides, approximate conditions for existence of the null...

"Blind spots" is a well known phenomena occuring in the operation of the phased array "blind spots" means total reflection of input power Either of two conditions leads to total reflection, null of the radiation resistance or infinity of the admittance. This paper is to investigate these conditions. Through detail mathematical analysis, it is concluded that the null of the radiation is the only reason to cause total reflection i.e. ''blind spots" . Besides, approximate conditions for existence of the null of the radiation resistance are give. We have also obtained some results different from those published in foreign literatures.

A direction-controlled weighting factor of crossed-loop element radiation pattern is derived,which shows that under weighting condition the principle of pattern multiplication can be applied to phased circular arrays of arbitrarily-oriented crossed-loop elements. Up till now, the techniques for optimization are considered appropriate for an array of similarly-oriented identical directive elements. Such techniques are expressed by the ratio of two Hermitian forms. The paper holds that such techniques can...

A direction-controlled weighting factor of crossed-loop element radiation pattern is derived,which shows that under weighting condition the principle of pattern multiplication can be applied to phased circular arrays of arbitrarily-oriented crossed-loop elements. Up till now, the techniques for optimization are considered appropriate for an array of similarly-oriented identical directive elements. Such techniques are expressed by the ratio of two Hermitian forms. The paper holds that such techniques can be applied to phased circular arrays of arbitrarily-oriented crossed-loop elements.The paper proposes a formula of far-zone radiation field for phased circular arrays of arbitrarily-oriented crossed-loop elements, derives an expression of far-zone field for phased circular arrays of crossed-loop elements under the weighting condition, and the optimization formula by adjusting either complex excitation or phase.