International Journal of Intelligent Engineering and Systems

8

Authors: Yu Ming, Liu Wei

Intelligent video monitoring system has been used widely in daily life. In order to avoid the casualties, as well as to predict potentially dangerous situations, real-time monitoring of crowd activities indoor has become an urgent requirement. In recent years, the video-based passenger flow counting systems have been improved a lot with constant equipment update. However, these systems are mostly aimed at a particular scene. In crowded circumstances, the statistical precision is not very satisfactory. The analysis of abnormal situations is thus imperfect. This paper improves the main algorithms, such as: the extraction of human, the segmentation of crowd and the judgment of human moving direction. Finally, the improved algorithms integrate a system which achieves two-way passenger flow counting. Consequently it first makes the early warning of abnormal conditions possible. The system’s statistical accuracy is remarkably improved, and testing result under different scenes is shown.

8

Authors: Shurui Fan, Jingbo Li, Jie Li, Hexu Sun

Traditional network control system offers many advantages but requires cables to inter-connect devices, which leads to high installation and maintenance costs due to low scalability and high failure rate of connectors. As a result, wireless technologies have gained an enormous success in the consumer goods industry in the last few years. Wireless Networked Measurement Control System (WNMCS) is a distributed control system based on the wireless measurement network, suitable for use at the device level of an automation system. For that purpose, Wireless Local Area Networks (WLAN) and Wireless Personal Area Networks (WPAN) can be employed. In this paper, a simulation model of WNMCS is designed on the basis of Matlab/Simulink, and the suitability of wireless sensor networks for networked control loop is shown. Real time character is the common request of control systems and multitasks is the mainstream of the distributed control system nowadays. Aiming at selecting communication protocol in the wireless networks, the TrueTime toolbox is applied to establishing the simulation model of the Wireless Network Measurement Control System (WNMCS). We compare the performance of WPAN-based WNMCS to that of WLAN-based WNMCS. Experimental results show that WPAN-based WNMCS is a very promising alternative for wireless industrial networking with short superframe, and WLAN-based WNMCS is more suitable for high throughput application.

9

Authors: Yanyan Han, Deshi Li, Jian Chen, Xiangguo Yang, Yuxi Hu, Guangmin Zhang

Multi-Robot Task Allocation is a crucial issue before performing a certain task. This paper deals with a distributed task allocation method based on some special relation defined according to the performance of history cooperation between two robots. The algorithm we propose here is named TARARC—a Task Allocation algorithm based on Robot Ability and Relevance with group Collaboration, where robot ability is weighed by reliability, relevance represents a fresh concept of “history relevance” between every two robots to establish reasonable groups for better collaboration, and the group collaboration includes inter and inner group help strategy that are adopted when different nodes failures happen in unknown environment. TARARC emphasizes the role of “agent node” in each group that is responsible for task competition, group leadership, formation maintenance as well as task execution with changing agents. Simulation on Player/Stage shows that our mechanism is feasible and valid.