The paper presents two possible signaling methods,one is taking two intersections as one to signal,and the other is applying green wave coordination control method.

According to the degree of mechanical vehicle traffic saturation, the width of pavement, the distance between two intersections and the traffic volume of non-mechanical vehicles, the combined influence coefficient K on accident rate can be estimated.

Study on traditional traffic signal control almost emphasized on the isolated intersection or two intersections as one basic unit in which the signal was controlled by some algorithms.

Analysed the operation of public transport vehicles in New Identity. Based on independent bus priority signal control planning and coordinated control theoretics in area, aims at minimum per capita delay at neighboring two intersections, sets up bus priority signal control model for neighboring intersections model.

An experiment of Indiana limestone has been conducted for estimation of preexisting stresses in rock cores. Five cylindrical specimens were pre-stressed under triaxial loading conditions to simulate various in situ stress fields. 26 pieces of specimens smaller, prepared from five pre-loaded rock specimens were under uniaxial pressure, when, acoustic emissions (AE) and applied stress were recorded as a function of time. The AE activity was presented as the sum of AE counts at each increment of 500 lbs. It was...

An experiment of Indiana limestone has been conducted for estimation of preexisting stresses in rock cores. Five cylindrical specimens were pre-stressed under triaxial loading conditions to simulate various in situ stress fields. 26 pieces of specimens smaller, prepared from five pre-loaded rock specimens were under uniaxial pressure, when, acoustic emissions (AE) and applied stress were recorded as a function of time. The AE activity was presented as the sum of AE counts at each increment of 500 lbs. It was found possible for each experiment to fit a set of three straight lines to data obtained by using least square method. The value of stress at two intersections of these three lines. may serve to predict the levels of the maximal preexisting axial stress and confining pressure. The error for this technique may be found to be within 10％ for most of specimens in use.

According to requirements of new aircraft for the skin, this paper makes design for the skin with reference to the form of the prototype's skin, by the aid of computers and numerical control technology. First of all, we establish the mathematical model of the skin (cylindrical equation) and find, as the middle segment of the skin, the public tangent cylindrer which is tangent commonly with both the fuselage and pod. Its tangent line is regarded as the intersection of both the skin and fuselage and of the skin...

According to requirements of new aircraft for the skin, this paper makes design for the skin with reference to the form of the prototype's skin, by the aid of computers and numerical control technology. First of all, we establish the mathematical model of the skin (cylindrical equation) and find, as the middle segment of the skin, the public tangent cylindrer which is tangent commonly with both the fuselage and pod. Its tangent line is regarded as the intersection of both the skin and fuselage and of the skin and pod. Then, for the frontal segment and the back segment of the skin, the curve is constructed in terms of the tangent line of the middle segment, its intersection is determined by smoothing and inserting values on it. Finally with the two intersections of the skin and the fuselage, and of the skin and the pod as the boundary condition, we put the cylinder into fitting, giving instruction for,the figure repuired is available on the drawing machine. The new skin has been used by manufacturing the model of the new aircraft. Its shaping method is simple and the appearance is beautiful, therefore, it is satisfactory.

This paper uses the envelope theory to define the connected surface of two intersection tubes and establishes the parametric equations of connected surface and connected tangent curves.On this basis the geometric calculation of sec- tions for two intersection tubes is made.To adopt the method of differential analysis the mesn of parametric curves,tangent,normal,area and curvature of connected surface are discussed. Thus,the theory basis of the structural strength calculation,the hydraulic calculation,the...

This paper uses the envelope theory to define the connected surface of two intersection tubes and establishes the parametric equations of connected surface and connected tangent curves.On this basis the geometric calculation of sec- tions for two intersection tubes is made.To adopt the method of differential analysis the mesn of parametric curves,tangent,normal,area and curvature of connected surface are discussed. Thus,the theory basis of the structural strength calculation,the hydraulic calculation,the processing surface and the Computer Aided Design(CAD)for the connected surface are provided.