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The initial real-time information system for Bus Rapid Transit (BRT) is based on Global Positioning System (GPS) in Ji'nan, it can't provide accurate real-time information of buses arrival/departure at stop, and missing data of GPS is often found, especially under elevated highway or in bad weather. The papers put forward a new way to provide real-time transit information for BRT based on GPS/Signpost...
Time synchronization is one of the key points in distributed real-time computer system. At first, a time synchronization method under 1PPS signal is put forth. Secondly, two kinds of relevant synthetic disturbance are analyzed, and time synchronization logic is studied to cope with the disturbance. Arena software is chosen to model and simulate the time synchronization procedure. At last, the whole...
In the paper, a simple motion controller based on LM628 is developed, aiming at the few axes medium-sized and minitype numerical control system. This controller achieves many functions, such as multi-axes linkage, beeline and circular arc interpolation, position and condition reporting, digital PID filter, special I/O and configurable I/O and so on. It can be used to numerical control machine tool...
Collision detection algorithm based on bounding box is an important algorithm of collision detection.The principle and effectiveness of axis-aligned bounding boxes(AABB)method, oriented bounding box method(OBB), discrete orientation polytopes (k-DOP)method were discussed in detail. The results of analysis prove that the simpleness of bounding box is in contradiction with the compactness of wrapped...
In this paper, taking mobile robot as the research object, the embedded control system is designed adopting PC/104 as host controller, which achieves the link among the expand boards, power module, motor driving module, perception modules, the HCI interface modules and so on; Wireless communication technology in mobile robots is investigated deeply, and then wireless remote control and wireless serial...
With the growth of hardware and software resources, the management of virtual machine system is becoming more and more difficult. It has become a very difficult problem that how to schedule the system resource in real time and improve the service performance of resource in a multiple virtual machine system. In order to solve this problem, the authors propose a real-time scheduling mechanism of resource...
The paper begins with introduction on the xen-based secure computer, the common data sharing methods and virtual disk access control. It puts forward a data sharing method based on virtual disk between guest OSs of Full-Virtualization in order to deal with the shortages of data sharing between virtual guest OSs based on Xen secure computer. It induces further analysis on the Xen driver split mechanism...
Virtual hardware-in-the-loop simulation (VHILS) simulation was proposed to validate real-time control software. The VHILS simulator integrated entire mechatronic control systems and dealt with multiple technology domains of mechanical, electronic, control and software. A processor simulator ran control software codes in binary format and analyzed accurately their real-time behavior. The VHILS concept...
The Ethernet-based network protocol is widely using in industrial environments. Its advantages include high speed, high performance, operation over long distances, and better interoperability. A number of techniques are used to implement the Ethernet protocol for the needs of industrial processes that must provide real time processes. This paper analyses network performance of an Embedded system based...
Over past few years, the studies of cultured neuronal networks have opened up avenues for understanding the ion channels, receptor molecules, and synaptic plasticity that may form the basis of learning and memory. The hippocampal neurons from rats are dissociated and cultured on a surface containing a grid of 64 electrodes. The signals from these 64 electrodes are acquired using a fast data acquisition...
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