A kinetic equation for uniform plasma in the presence of both constant electric and magnetic fields was obtained by the method of micro-density in the phase space.
According to the Fresnel-Kirchhoff diffraction theory, we have analyzed systematically the space frequeney bandwidth of rainbow hologram and ordinary hologram as the object, slit, reference source and holographic plate are in different relative positions. For each of these cases, a universal fomula of frequency bandwidth has been derived, it is suitable not only to rainbow hologram but also to ord...
The projections of an input image on the Schmidt orthogonalized basis functions are determined from the crosscorrelation matrix of the input and the reference image, so a novel method for multi-characteristic pattern recognition has been provided. The experimental demonstrations are in agreement with the theory.
In this paper, we describe a hybrid nonlinear P-P Bistable Optical Device (BOD), the length of its cavity is controllable. The dynamic equations of the system and the equilibrium splution which shows the optical bistable nature are given. The bis-tability and linear modulation characteristics are discussed. The stability of the equilibrium state and the "critical slowing down" effect of transient ...
In this paper, a procedure and its computer program for including secondary extinction as a parameter in crystal structure least-squares analysis are described. The effect of its use in some crystal structure analysis refinements is also given.
The effect of entering of Fe-atoms and Sn-atoms into crystal lattice of permanent magnet SmCo5 on the X-ray diffraction relative intensities is studied. It is observed that the Fe-atoms can replace the Co-atoms on any site, but they replace Co2c more readily.However, the Sn-atoms replace the Co-atoms or 3 g sites more easily. The replacement of Co-atoms by the Sn-atoms can increases the ratio of X...
The present article gives an account of a calculation of the sub-band structure and atomic plane projected electronic local densities of states of a simplified model of the newly appeared synthetic materials, Layered Ultra-thin Coherent Structures (LUCS), by means of the Green's function method in the tight-binding approximation including the nearest neighbor matrix elements only. A formulation of...
The effect of heat treatment on the microstrueture and Superconducting properties of the eutectic alloy Al- 11.3 at % Si prepared by the splat quenching technique has! been studied. The results of structure analyses indicated that the rapidly cooled Al-11.3 at % Si alloy consists of two phases: a supersaturated α-Al(Si) solid solution and an amorphous phase of Al and Si atoms which are distributed...
In this paper, a theoretical method is presented to calculate the third order optical susceptibility which is induced by the saturation effect of light absorption near exeiton lines. In particular, the numerical results of the nonlinear susceptibility are given in both exeiton lines of GaAs and exeiton lines of the yellow series of Cu2O.
In the present paper, the conclusion we arrive through analyzing the (dTc/dλ)-λ curve is that the Tc-λ curve is composed of three parts with entirely different properties, namely, "McMillan region", "λn region" and "series solution region". This conclusion is identical with that obtained in paper [20] except that the value of n is, in general, not equal to 1.55 but is a real number larger than 0.5...
This short note elucidates some points of the ref, [1] It is pointed out that to introduce the macroscopic current operator into the quantum theory of transport processes in strong magnetic field is necessary and reasonable.
Though there are various methods in deriving the Hawking evaporation formula, but all of them depend on explicit forms of the space-time metrics. Not long ago, we have put forward a conjecture. "Independent of the explicit forms of space-time metrics, every static or stationary space-time with furture horizon must have Hawking evaporation." Now in this paper, we give a full proof of this conjectur...
Aecording to Parisi's suggestion, we assume that the gluon possesses a non-zero effective mass μ. From this assumption, we derive an effective Hamiltonian up to order β2 for quarkonium. For μ = 0.8 GeVand 0.4 GeV, we find the spectra as well as the relative leptonic widths for charmonium and upsilon, which are in good agreement with experiment.
The crystal structure of Pt(en) (mal) (OH)2H2O has been determined from three-dimensional X-ray data collected by Syntex P3/R3 four circle diffractometer. The crystal is triclinic with space group P1, α =8.4526(15)?, b=6.0947 (8)?, c=10.1854 (15)?, α = 106.48°(I), β= 103.65°(I), γ= 79.12° (I), and Z = 2. The crystal structure has been solved by Patterson method and refined by block least square re...
A single-crystal X-ray diffraction analysis has been performed on LiNdP4O12synthesized by the flux method. The crystal belongs to monoclinic system, with space group C2/c, z=4, and cell parameters α= 16.486?, b = 7.073 ?, c =9.775? and β = 126.23°. A full-matrix, least square refinement gave R = 0.054, Rω= 0.050 for 1251 independent reflections. An absorption and secondary extinction refinement gi...
The crystal structure of 3, 4-methylenedioxy-cinnamoyl piperidide, a clinical an-tiepiletic remedy, was determined. The molecular formula is C15H17O3N1. The crystal belongs to the orthogonal system. The space group is D24-P21 21 21. The lattice parameters are: α = 24.338 (4)?, b = 8.558 (2)?, c = 6.217 (2)?, and Z = 4. The intensity data were collected on PW-1100 automated four-circle diffractorme...
The crystal structure of alkaloide, koumine Hydrobromide (C20H22N2O·HBr), has been solved by Patterson and Fourier methods and refined to an R value of 0.067 by full-matrix least-square method. The crystal belongs to orthorhombic system with the unit cell parameters: a = 14.307?, b = 12.053?, c = 9.862?; and four molecules are contained in the cell. The space group is P21 21 21. The positions of a...
The crystal of Quinine salt of (+)-0-ethyl O-phenyl phosphorothioic acid belongs to orthorhombic system with space group D24-P21 21 21 and cell parameters a= 29.007 (7)?, b = 14.089 (4)?, c = 6.589 (3)?. There are four molecules ia each unit coll, Z= 4. X-Ray diffraction intensity data are collected on PW-1100 four-circle diffracto-meter, using CuKα radiation. The number of independent diffraction...