Starting from two theta identities respectively,we reobtain some results of representing integers as sums of squares and some conclusions of modular equation.

Static model equations of SIMU were provided,the calibrating method of all parameters in the model equations and the calculating method about error compensation w.

The paper introduced a new and comprehensive research technique, eco-toxicological risk assessment, and put forward a model equation for measuring the pesticide maximum acceptable half-life.

This paper introduces the operating principle, base structures and model equation of Coriolis vibratory gyros in accordance with the research improvements in china and abroad.

This paper takes fuzzy number difference as the solution of the fuzzy equation,therefore discusses the problem of finding the solution of fuzzy equation,and based on the theory of goal programming,gives the generalized solution of fuzzy equation.

By means of fuzzy statistical methods, the discussion on fuzzy features of the system motion and the methods used to solve fuzzy equations is made.

Analysing the propagation of EM wave for the circular tunnels and tunnels with a contained axial conductor, the formulas of attenuation and the mode equations are given and they are solved by the Muller s way.