Beijing Jiaotong University

China Institute of Water Resources and Hydropower Research

Beijing Xiaomi Mobile Software Co., Ltd.

Xiaomi Inc.

Hongjie Liu

Wei Liu

Li Ni Zhang

Hai Long

Minghao Li

Shuai Su

Jidong Lv

Ming Chai

Xuejun Zhang

Tao Tang

Lihua Zhao

Wenlong Song

Xiaolin Luo

Juan Lv

Yizhu Lu

Zhicheng Su

Yuanyuan Duan

Rui Tang

Jingxuan Lu

Jinshi Song

A method and system for virtually coupled train set (VCTS) control is provided. The method includes following steps: determining whether to execute a backup control strategy based on an actual state for a current cycle of each train unit and a target state sequence for a first preset number of cycles before the current cycle to obtain a first determination result; if the first determination result is yes, executing the backup control strategy to control each train unit; if the first determination result is no, calculating the target state sequence for the current cycle of each train unit according to a position or calculating the target state sequence for the current cycle of each train unit by using a synchronization relationship; and controlling each train unit according to the target state sequence for the current cycle of each train unit, respectively.

Method and system for virtually coupled train set control

Provided is a relative velocity train protection method and apparatus. The method includes the following steps: a preceding train and a following train in two successive trains calculate their safe spatial-temporal trajectory information in a stopping process using an electronic map, velocity measurement and positioning information, and performance of the train (S); the following train obtains the spatial-temporal trajectory information of the preceding train through vehicle-to-vehicle communication (S); the following train creates a safety condition according to a constraint that a position of the following train does not surpass that of the preceding train at any time, and solves the emergency brake intervention (EBI) velocity of the following train (S); the following train determines whether its measured velocity v(t) exceeds the EBI velocity E(t), and if so, make the following train decelerate until the following train stops (S).

Relative velocity based train protection method and apparatus

A Region Merging image segmentation algorithm based on boundary extraction is disclosed, comprising the steps of calculating a gradient image, extracting a boundary and carrying out initial segmentation and Region Merging, wherein each pixel is regarded as one region when initial segmentation is not conducted. In the Region Merging process, the portion of the common boundary of two adjacent regions that lies on the boundary image is taken as the merging cost, the regions are merged according to the ascending order of the mean gradient value inside the region, and a texture difference evaluation mechanism is introduced to reduce the wrong segmentation. The algorithm solves the problems of the other current segmentation algorithms, such as over-segmentation, easy to be influenced by noise and illumination, large in computation and memory consumption, in need of a large number of samples being marked manually and the like. Besides, all regions or all categories achieve the best segmentation result on one final segmentation result. These advantageous features can reduce the computational resource consumption of subsequent tasks and improve their results.

Region merging image segmentation algorithm based on boundary extraction

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Beijing, China

Hongjie Liu