摘要:This paper presents solution to some integrable nonlinear differential Equations and two - dimensional variable coefficient linear differential system by means of the main conclusions of Text Ⅰ and Text Ⅳ, and relative techniques of Text Ⅱ , Text Ⅲ and Text Ⅳ , and also the method of variable substitution. Moreover, it gives the method of seeking solution and the expression of reduction of integral to common denominator.
关键词:nonlinear differential equation;two - dimensional variable coefficient linear differential system;integrable;reduction of integral to common denominator
摘要:Multifractal in the Mathematics is introduced briefly and momentous significance of the study physics mechanism of form about multifractal for modern science and technology is discussed from point of view of physics.
摘要:The polarization mode dispersion and its measurement method for utility single -mode fiber are presented in this paper. In transmission of two orthogonal polarization modes, the birefringence of the fiber causes the variations in their direction and the differences in time delay between two modes, thus, it is largely possible to wide the optical pulses , to create incorrect codes.Therefore, the channel capacity and transmission distance ane limited.
摘要:In this paper, we discussed the method of comprehensive measurement of laser parameters. These parameters include output beam power Pout, output power stability Pw, power density σ, transverse mode TEM, Light beam radius r and divergence angle θ. This method can also be used in other optical measurements.
摘要:Polarization dispersion due to stress anisotropy and elliptical core deformation are separated by measuring their wavelength dependences. Here is theory results from the dielectric constant perturbation.
摘要:Through the analysis of refraction, diffraction effects and shorten effect of wavelength, a correct method of calculation resolving power of the human eye is indicated.
关键词:human eye;resolving power;angle of minimum resolution
摘要:In this paper, Rh2( AcO)4 and Rh6(CO)16 were used as catalyst for hyclroformy lation and hydrogenation of heptcne to form octanol in a higb pressure reaction autoclave under favourable conditions.A active species was studied by In Situ IR in the Rh/FBu3/EtOH catalysis system, and in which aldehyde appear and disappear to form octanol in the end. The In Situ IR spectra is different from that was determined in air.
关键词:Homogeneous catalysis;Hydroformylation and Hydrogcnation;In Situ IR spectra;Rhodium phosplline catalyst
摘要:In the present paper, we explain the principle of measuring the stability constant of complex compound by derivative spectrophotometry and report the results of measuring the Kzn-pAR. The results are satisfied.
摘要:In this peper, We refer to literature about hygienic cleaning agent at home and abroad, research and make up neoproducts with hold together clean bactericide deodorizing and so on. They divide into solid and ointment two type. We verify that germicidal energexceeded evidently other products.
摘要:Athlete’s heart appears as heart dilatation in shape. The type and degree of heart dilatation have a close relationship with sport item, intensity of training and time of training. Athlete’s heart makes some characteristic changes in function, such as sino - atrial bradycardia, sino - atrial heart block and premature beat, etc. The difference between athlete’s heart dilatation and pathological heart dilatation is the point at issue in the research.