The flat V-type weir is of advantage to measure in precision and record automatically.

The flat V weir is a useful flow measurment tool to get a quantitive relationship between forest change and discharge variation of river which could help to make out the accurate situation of water balance in catchment scale.

A pinching theorem of compact pseudoumbilical submanifolds with parallel mean curvature vector in a locally symmetric conformally flat Riemannian manifolds;

In this paper,we study 2-harmonic spacelike hypersurfaces in a locally symmetric and conformally flat lorentz manifold and obtain a pinching theorem of the class of hypersurfaces to the ambient manifold.

In this paper, we discuss the 2-harmonic spacelike submanifolds in a locally symmetric and conformally flat pseudo-riemannian manifold and get two sufficient conditions under which Mn turns into a maximal submanifold,and the results in [2] are improved.

This paper obtaines some pinching theorems of compactly minimal Submanifolds in a locally symmetric and conformal flat Riemannian manifold.

The purpose of the present paper is to find out the condi tion for a conformal flat Finsler space to be Minkowski space.

In this paper we study the condition of a conformal flat Finsler space.

Taking into account uneven terrain,complex working environment,rolling slip,we design a driven wheel machine with the ability to apperceive changing of terrain and measure the velocity.

Hence, this paper presents a dead reckoning method for an experimental platform of mobile robot with three rocker-bogie suspensions and six drive wheels on uneven terrain.