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46 results on '"Ma, Ze"'

26. The Model of Parking Demand Forecast for the Urban CCD

Author

Cheng Tiexin, Tai Miaomiao, and Ma Ze

Subjects
Transport engineering, Energy(all), Parking guidance and information, Occupancy, Central Commercial District(CCD), Service level, Parking Demand Forecast, Parking Lot, Parking lot, Generation rate, Business, Demand forecasting, Capacity of Road Network
Abstract

With the increase of the number of automobiles, the city parking demand occurred a rapid growth, and the city automobile parking had become a very serious traffic problem for Central Commercial District in cities. The parking demand forecast is the key of public parking planning and provides the basic data for the size of the parking lot. On the basis of the Parking Generation Rate Model, the improved model was set up, considering more factors, such as the average turnover rate, parking place occupancy, service level, parking fees and growth rate of automobiles. Meanwhile, the capacity of road network is applied to rectify the short-term parking demand forecast. Finally, the model was applied to Binjiang Road CCD, Tianjin, China.

Published
2012

30. An simulation technology of sheet-metal forming with trial-and-error contact algorithm

Author

Ma Ze-en, Kong Yongming, and Liu Laiying

Subjects
Shell element, Emphasis (telecommunications), Metals and Alloys, Trial and error, Industrial and Manufacturing Engineering, Finite element method, Computer Science Applications, Modeling and Simulation, visual_art, Ceramics and Composites, visual_art.visual_art_medium, Code (cryptography), Boundary value problem, Sheet metal, Algorithm, Mathematics, Stiffness matrix
Abstract

In this paper, an implicit simulation code which can simulate a general three-dimensional sheet-metal forming is presented. An 8-node degenerated shell element is employed to approximate the continuous updated Lagrangian formulation of the global mechanical problem. Emphasis is put on expressing the contact conditions and taking into account the geometrical non-linearity. The characteristics of the authors’ contact algorithm is that the contact conditions just act as the boundary conditions of the FEM equations and need not be introduced into the stiffness matrix. Finally, two numerical examples demonstrating the effectiveness of the present approach are given.

Published
2002

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