The Trigonometric Function Method for Symmetrical Bending of Cantilever Rectangular Plates;

Determination of optimal power of data fitting to characteristic curve of trigonometric function;

Generalization of a Definite Integral Formula about Trigonometric Function;

In this paper,a method of approach to curve & Surface modelling based on triangle function is proposed,which has the principal merits of B-Spline and achieres a C 3 curve.

In this paper,using partially the method of Majorization,we give the supremum and infimum of the triangle function of (k) = ∑sink A - ∑ cosk A(k=3, 5

This paper discusses an algebraic property of values of rational degrees of triangle functions.

Class of quasi-cubic parametric curves based on trigonometric functions;

These ways include the use of simultaneous equations, trigonometric functions and computer aided drawing software.

This paper gives a general equivalent infinitesimal of trigonometric functions,and utilizes the equivalentinfinitesimal to make questions become easy.

Based on mathematical calculations,failure criteria of Lade-Duncan,modified Lade-Duncan and Matsuoka-Nakai could be transformed into J 2 = g(θ σ)? f(I1),and the corresponding ridge function g(θ σ)was derived from these failure criteria.

Based on the ridge function derived from Matsuoka-Nakai,Lade-Duncan and Ottosen strength failure criteria,a modified Ottosen failure criterion is proposed and verified by the true triaxial strength test data of concrete and rock.

This paper briefly analyzes wedge angle and function of wedge angle of the Archimedean out star wheel overrunning clutch, discussing effect of polar angle、roller radius、structure size of the overrunning clutch、wear on wedge angle.