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22 August 1989, Volume 8 Issue 4 Previous Issue    Next Issue

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Study of Nonlinear Mechanism and Calculated Models for Lateral Loaded Pile Wu Hengli 1989, 8(4): 1-6.  Abstract ( )   PDF (402KB) ( )   In this paper, on the basis of the analysis of nonlinear mechanism, we proposed a series calculated models for lateral loaded pile which describe the pile-soil coaction. Some concepts supposed in the paper are useful for reference, further study and application. Related Articles | Metrics

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A Productive Forces Distribution Model with Entropy Constraint Ⅰ: Model and Principle Chen Guozhen, He Zonglu 1989, 8(4): 7-16.  Abstract ( )   PDF (553KB) ( )   The authors think that the addition of entropy constraint to the classical productive forces distribution theory accord better with facts. In this paper, we introduced a productive forces distribution model with entropy constraint and proved that the solution of this problem in some conditions is a gravity model. The importance of this notion is evident, because it shows that in the economic field there exist gravity phenomena. Related Articles | Metrics

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Comment on Practical Methods for Calculating Wide and Shallow Curved Slab Bridges with Multi-Cell Section Chen Xiangyun, Li Xinping 1989, 8(4): 17-25.  Abstract ( )   PDF (524KB) ( )   In this paper, based on the test results of the perspex model bridges and the analysis of the transverse load distribution for wide and shallow curved slab bridges, comments on several kinds of current practical methods for calculating curved multi-girder bridges are given. In the meantime, a comparison between the structural behaviours of the bridges either with or without a middle diaphragm is made. Many data in this paper may be used for selecting the structural type and the calculation method in bridge design. Related Articles | Metrics

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The Correlation Equation of Two End Deformations of Steel Beam-Columns Li Kaixi, Xu Wanming 1989, 8(4): 26-36.  Abstract ( )   PDF (758KB) ( )   This paper establishes the correlation equation of two end deformations of steel beam-columns. By combining it with the contrary calculation of segment length method, a new calculation method is reached for the ultimate strength of steel beam-columns. In this method, the beam-column is considered as on the element. It is the basis of calculating ultimate strength of fixed steel beam-columns and steel frames. Related Articles | Metrics

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The Fundamental Equations of Orthotropic Sandwich Plate Based on Hoff's Theory Jiang Guobin, Li Zuqiang 1989, 8(4): 37-43.  Abstract ( )   PDF (355KB) ( )   In this paper, the fundamental equations of sandwich plate are presented in which the surface is an orthotropic thin plate and the middle layer is also of orthotropic material. Two equations non-coupled are deduced by H's simplified method, which is changed. And moreover, a method is given to calculate w*,ψx*,ψy* when we want to solve the problem of orthotropic plate by the separating stiffness method. Related Articles | Metrics

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The Distribution for the Data Set to Influence Fitted Values of Each Point in Regression Diagnostics Yang Hu 1989, 8(4): 44-52.  Abstract ( )   PDF (573KB) ( )   In this paper, we discuss all kinds of influence functions used to determine influential cases in regression diagnostics and their relation between each other, and propose the distribution for data set to influence fitted values of each point, which can be used as another measure to determine influential cases.We establish the relation between influence distributions and the complex correlation coefficient to finish up with, and generalize these results in regression diagnostics of multivariate linear models. Related Articles | Metrics

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Boundary Layer Function Method for the Solution of Instantaneous Temperature Field Chen Minglun, Wang Guoying 1989, 8(4): 53-62.  Abstract ( )   PDF (572KB) ( )   In this paper, the boundary layer function method, an effective method for the solution of singular perturbation, was presented and used to deal with the heat transfer in thin rectangular plates. Related Articles | Metrics

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The Theoretical Conversion of Conditional Viscosity into Absolute Viscosity Wang Jinyan 1989, 8(4): 63-67.  Abstract ( )   PDF (276KB) ( )   In this paper a theoretical conversion formula of conditional viscosity into absolute viscosity has been derived on the basis of Newton's Law of viscous fluid. Related Articles | Metrics

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The Calculating Methods of Conflict Number at Uncontrolled Intersection Han Zhi 1989, 8(4): 68-77,52.  Abstract ( )   PDF (602KB) ( )   This paper researched the conflict at uncontrolled junctions with probabilistic methods, gave the formula for calculating the conflict number, and discussed the relationship between the conflict number and its parameters. Related Articles | Metrics

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Lagrangian Equations in the Non-Inertial Frame via Generalized Potentials Wu Chengping, Zhang Lukun 1989, 8(4): 78-82,67.  Abstract ( )   PDF (328KB) ( )   By kinetic energy this paper first gives the definitions of generalized potentials respectively according to different inertial forces. Second, it uses the generalized potentials to obtain Lagrangian functions in the non-inertial coordinate frame. Therefore, a generalization of the Lagrangian equations in the non-inertial system is given. The approach in this paper is effective and convenient for the research of relative motion. Related Articles | Metrics

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Approaching the Relationship Between the Intact Ratio, Utilization Ratio, Efficiency and Economic Benefit of the Road Machinery Guo Xiaohong 1989, 8(4): 83-90.  Abstract ( )   PDF (539KB) ( )   At present, there remain many problems in the checkout of construction machinery in road construction enterprises. The mechanical managers pay attention only to the mechanical intact ratio and utilization ratio but not to the economic benefit. After analyzing the present indexes of mechanical checkout: intact ratio, utilization ratio and efficiency, the author puts forward a new set of indexes, utilization ratio, cost ratio, income ratio and compre-hensive efficiency, and points out that we should use new indexes to check out the machinery and evaluate the work of the mechanical management. After discussing the new indexes, the author classifies them, and gives his opinions on how to attain the goal of increasing the mechanical comprehensive efficiency. Related Articles | Metrics

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A Study of the Structure of COMTICS Ye Renzhi 1989, 8(4): 91-95.  Abstract ( )   PDF (374KB) ( )   COMTICS is communication oriented motor transport information and control system. According to types of enterprise of management, we can describe MIS as four kinds of subsystem. From the view of the function of organization, we can also describe MIS as unity of subsystem which does different function. Every function subsystem includes four kinds of activity. To the character of management of motor transport enterprise, we describe such a structure of MIS which suits this enterprise, that is,the structure of COMTICS. Related Articles | Metrics

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Computing Method for the Depth of Water Flowing at Constricted Cross-Section Tan Zhenhong 1989, 8(4): 96-98.  Abstract ( )   PDF (182KB) ( )   This paper gives an explicit formula for computing the constrictive depth of water flowing in trapezoid, triangular or rectangular channels. Related Articles | Metrics

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Computer and Automatic Control of Urban Transportation He Xiaohong, Tan Bin 1989, 8(4): 99-102,119.  Abstract ( )   PDF (373KB) ( )   Now the world is in a message age, and the computer is the best assistant to transmit messages. It has been proved that the computer has become a powerful tool for building control system of urban transportation. From two sides, i. e. computer technology and automatic control technology of urban transportation, this paper discusses the impact of the computer on the control of the system of urban transportation. Related Articles | Metrics

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The Principle and Error of Centrifugal Model Test in Soil Mechanics Tang Zhicheng 1989, 8(4): 103-110.  Abstract ( )   PDF (402KB) ( )   Centrifugal model test has been widely used in various fields of civil engineering. In this paper, the principle is introduced and the error is discussed. Related Articles | Metrics