Geological Characteristics and Prospecting Indicators of Aozigang Zinc Deposit,Hubei Province;

Basic Characteristics of Aozigang Zinc Deposit in Yuan'an County,Hubei Province

Studying of the mathematical model of the concave roller curved surface for steel pipe transportation equipment;

According to the geometry relations of steel pipe and the roller at the steel pipe transportation,we established the mathematical model of roller curved surface,using the vector analysis method,and inferred the concave curved surface equation of concave roller,which provided the theory basis for calculated the forced parameters and the optimized design to concave roller.

By choosing suitable Banach space and cone,a sufficient condition of the existence and uniqueness of positive solution for a class of boundary value problems with p-Laplacian is given by using the fixed point theorems for u0 concave operators.

Conditions for the Existence and Uniqueness of Positive Solution for a Class of Fourth Order Boundary Value Problems is given in this paper by using the fixed point theorems for u0 concave operators.

Sufficient conditions for the existence of positive almost periodic solutions are obtained by using u_0-concave operator and increasing operator.

In this paper,the existence and uniqueness of positive fixed points for u_0-concave operators is obtained by means of the properties of cone and monotone iterative technique.