摘要:In this paper, we define addition and multiplication in the set of mapping for arbitrary group, prove it s a Near - ring, and discuss the relation of a Near -ring with identity and mapping Near - ring. Finally, we obtain the equivalent condition for the endomorphism set of a group is a mapping Near - ring.
摘要:In this paper, we consider controllability of initial control problem for nonhomogeneous heat equation by constructing the new iterative sequence, generalize the main results of paper[1].
摘要:In this paper, we generalize the finite additivity of integral interval in mathematical analysis and give the countable additivity of integral interval.
摘要:A new synthetic method for tetrabromobisphenol A was described. H2O2 was added to the reaction system and HBr was oxydized to Br2, therefore it can be saved. Thus, the merits of this method are convenient in operation, high yield and pollution- free.
摘要:This artical analysed the phenomena of "gardon in water" and "chemical vibration" issued the questions of deformed and self - organizing on the non - linear science.
摘要:In this paper, We studied the preparation experiment of CuCl and proposed that a pale yellow color acts as the indicatoin that H[CuCl2] has produced completely. We abtained the best preparation conditions by reserarch every factor that affects the preparatory reaction. This method is safely and successive in lab experiments.
摘要:We have given a complete analysis and detailed discussion of the problem of measuring momentum of a particle in a one - dimensional infinite potential well and thus provided a complementary treatment of this problem to the textbooks on quantum mechanics.
摘要:This paper advances another universal form of thermodynamic’s Second Law. This method not only can be used for the transform between the work and energy, but also any other process.
关键词:Work;Transform between the work and energy;Thermodynanic’s Second law
摘要:The theoretical vinculum between a plate and a grillage beam is given in this paper, and the mechanical similarity for those structural models is established. Consequently, it. is possible for a structure to be analysed with another model, and calculation can be simplified.
关键词:mechanics;engineering structure;theory of plate and shell
摘要:This paper, in the light of production reality, makes an exploration of spinning production technology of extra strong pure polyester fibre sewing thread in aspects of raw material selection, technological process and equipment, working procedure, technological design and requirements, etc.