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This paper studies how to extract and group essential nodes to guarantee loop freedom during the update of the network, while minimizing update time. We propose a model to establish the relationships of loops which may arise during the updating procedure. Given the model, we design a heuristic algorithm, with the recursive optimizing for the relationships, to extract essential nodes for the loop-free...
MapReduce plays an critical role in finding insights in Big Data. The performance optimization of MapReduce programs is challenging because it requires a comprehensive understanding of the whole system including both hardware layers (processors, storages, networks and etc), and software stacks (operating systems, JVM, runtime, applications and etc). However, most of the existing performance tuning...
Radar scattering characteristics is an important researching content of military target. It is always very difficult to deal with simulation of electromagnetism field , especially to analyze the monostatic RCS characteristics. Aiming at a kind of complex & electrically large size target , this paper reasonably estimated its multi-point monostatic RCS using smaller resources by adopting the electromagnetic...
A non-contact optical-electric measuring principle is introduced that is based on pulsed laser light source and high-precision CCD imaging technology. The diameter- measuring device design framework and some basic structure units are given. Meanwhile, the FPGA (Field Programmable Gate Array)-based devices of the linear array CCD data acquisition and signal-processing system including various functional...
In heterogeneous multi-core systems, such as the Cell BE processor, each accelerator core has its own fast local memory without hardware supported coherence and the software is responsible to dynamically transfer data between the fast local and slow global memory. The data can be transferred through either a software controlled cache or a direct buffer. The software controlled cache maintains correctness...
Nowadays, at the age of information explosion, in a fast-paced economical society, restaurants have become the main kitchen of people. However, in most enterprises of catering industry, the concept of information system management still stays at the state of “keeping accounts with the financial software, and printing bills out”. How to enhance the service level in the catering industry with information-based...
Facing changing environments and evolving business, service composition happens all time. However, services do not always interact properly because of mismatches between their interfaces. In this paper, we use labelled interface automata, an extension of interface automata, to illustrate mismatching interfaces and resolution approaches. We model service interfaces with labelled interface automata...
In order to visualize the satellite navigation simulation system, the framework of a distributed satellite navigation simulation system composed of multi-platform systems was analyzed. The composition and the functions of the satellite navigation simulation system visualization software were illuminated. Based on MFC, presented the designing and realizing methods of the system information display...
Remote Home Monitoring System is one of important steps of the national medical and health system innovation. In this paper, we present a Remote Home Monitoring System (RHMS) which is consisted by the client side that in patients' houses and the server side that in hospitals. The key points are the design of client side software and multimedia interactive technology. The Visual C++ and SQL programming...
A new design approach of the LDPC decoder based on FPGA Impulse C Programming is proposed. The latest technique of Impulse C programming is used to implement hardware circuit, which is more efficient than the traditional HDL method. The decoder for a family of (3,6) LDPC Codes with 0.5 code rate and the block size of 2500 bits is implemented on Xilinx Virtex2 XC2V2000. When the maximum iteration time...
In today's Web, more and more software and applications are wrapped as services. However interactions between services are not always perfectly completed because of mismatches among them. Service mediation and adaptation problems obtain increasingly concerns. In this paper, we propose an extension of interface automata, labelled interface automata, to illustrate mismatching services and adaptation...
Cross platform debugging can make the software debugging and hardware platform developing work simultaneity in embedded system development, which accelerates the development lifecycle dramatically. Reverse execution can run program backward to historic points, may provide programmers with a useful approach of fast locating the cause of the program failure. In this paper, we propose a reversible debugging...
This paper presents an eye-gaze tracking system based on the image processing. All the computations are performed in software and the system just needs a PC camera attached to the user's computer. We first extract the facial regions form the images using the skin-color model and connected-component analysis. Then the eye regions are detected by employing the rules and area segmentation. After the...
Electric field optimization is the key task for vacuum circuit breakers design. By the electric field calculation, the isopotential of a semi-plane flat electrode with infinitesimal small thickness is almost hemicycle, and the figure of an actual shield should be what the isopotential rotates around its shaft for a circular course, but not other figures. Three common figures of middle shield have...
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