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To solve the problem that collaborative design concurrency control cannot adopt optimistic locking mechanism or traditional pessimistic locking mode, THP(Tentative Hold Protocol) is introduced into collaborative design concurrency control method on the basis of studying on it and its transaction model. And then, a conflict prevention method is proposed based on THP. The method avoids deadlock and...
Range-gated laser imaging technology as a way of underwater detection featuring long detecting distance has a very wide range of applications in underwater exploration, reconnaissance, rescue and other fields. Digital image enhancement algorithm has been proved to have a significant effect to further improve the image quality of underwater range-gated laser imaging system. Based on lab's previous...
The state machine can be used to describe reactive event-driven software system effectively. Existing commercial tools which can generate code from the state diagram all base on real-time framework mostly. But the code size of these frameworks is a little more, it will be a big shortage for military weapon systems that the hardware resources are limited and time is critical. By the detailed analysis...
This paper presents a zoning positioning model based on minimize RFID reader. Compared with conventional RFID reader, the transmission power does not need to be fixed and it is not necessary to detect RSSI of tag. Compared with the landmarc algorithm and its improved Vire algorithm, the complexity of the equipment is simplified and the time is reduced during the positioning process. Minimize RFID...
Windows Operating System is currently the most widely used, which is a non-real-time operating system. It can't be used to provide a real-time communication environment for applications. However, for some distributed system, real-time data communication is essential. Considering these constraints and requirements, this paper proposes a real-time communication solution based on processor separation...
In the occasion of real-time requirements and harsh electromagnetic environments, currently adaptive filtering algorithm is most based on the DSP chip, using of Assembly Language and high-level language programming procedures, and the speed of processing and the performance of noise immunity are not match the requirement. LMS adaptive filter is a widely used digital signal processing algorithms. Due...
In traditional motion detection, the problem is that light changing and shadow are sensitive for background subtraction and it is difficult to achieve real-time detection due to high dimension and a large number of calculating when suing center-symmetric local binary patterns (CSLBP). A reasonable method of combining both method is proposed and used for motion detection. Using improved background...
The communication services for smart grid are required to be reliable, real-time, flexible and diverse. However, the existing Ethernet technology cannot solve the problem how services with different requirements co-exist in the same network. Based on the connection-oriented packet transport network (PTN) switching technology and the multi-path rapid protection (PRP) technology, a novel industrial...
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