摘要:According to the principle of superposition and the first and the second kind of eomplete ellipse integral. We calculate the magnetic field on annular electric current.
关键词:magnetic field intensity;annular electric current;eomplete ellipse integral
摘要:Silicone surfactants have become one of the most successful group of surfac-tant. They have outstanding surface activity not only in water but also in organic media- Silicone surfactants have many synthesis and kinds, and gradually achieve widespread application. In this paper it is introduced synthesis, characteristics and application of silicone surfactants.
摘要:Speciation of iron in seawater of Jiaozhou Bay in Qingdao was investigated by cathodic stripping voltammetry method which take advantage of ligand competition of an added electroactive ligand, 1-nitroso-2-naphthol(NN), with the natural organic complexing mater to evaluate whether iron is organically complexed. The measurements indicate that iron occurs 99% complexed by organic comlpexing ligands in seawater of the Jiaozhou Bay in Qingdao. The concentration of natural organic ligands was 47. 6nmol· L-1, The conditional stability constant logKFeL is 21. 09.
摘要:This paper describes the three factors that affect the alkalinity of the compounds containing nitrogen and gives the method that adjusts the alkalinity of these compounds, furthermore, the paper also provides new and reasonable explanations to some results.
摘要:Under the action of random excitations, the response of a simple pendulum with large displacement was studied in this paper by means of nonlinear spectral analysis. It is not necessary to have the nonlinear term linearized in this method, so that the errors intro-duced by linearization can be eliminated. The study indicates that the linearized solution gives reasonable approximation when the displacement being small. When the displacement becomes large enough, the errors introduced by linearization increase significantly. Therefore, the nonlinear effect due to large displacement should be taken into consideration.
关键词:Nonlinear spectral analysis;Nonlinear random vibration;Simple pendulum;Large displacement
摘要:In this paper, the authors put forward the calculating characteristics for stability and rigidity on masonry structure, present the treatment thinkings of under twe special conditions.
关键词:Height-thickness ratio;Critical force;Coefficient of correction