The self-developed finite element program on return mapping algorithm is used for the simulation of true tunnel with C++ language, while the finite element program is embedded into differential evolution algorithm to incorporate rock mechanics parameters. Applying to Line 1 of Dalian Metro, inversion parameters and true parameters are found to be close, which indicates the superiority and good ...

BACKGROUND Magnitudes, geographic and racial variation in trends in coronary heart disease (CHD) mortality within the US require updating for health services and health disparities research. Therefore the aim of this study is to present data on these trends through 2007. METHODS Data for CHD were analyzed using the US mortality files for 1999-2007 obtained from the US Centers for Disease Cont...

We give a comprehensive overview of the state of the art in automated metro map layout. A large number of algorithms for computing metro maps have been developed over the last 10– 15 years by researchers in computer science and related fields. In this survey, we distinguish three subtasks of generating metro map layouts (schematic network layout, label placement, crossing minimization) and give...

A research into congestion propagation mechanism of urban rail transit passenger flow in train delay scenario is great significance to the formulation coordinated limitation measures among operation lines networks. This paper presents a methodology for modelling cascade dynamics congestion. In this method, firstly, computing method network states based on load entropy proposed describe overall ...