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In this paper, on the basis of analyzing theoretically and summing up calculational methods about Bend loss of single-mode fibers, Matlab simulation has been accomplished. Synchronously, it showed the measurements of the bend loss in G.652 fiber for the different bend radius by using OTDR, compared to academic result. Withal, it also performed the measurements of the bend loss in single-mode fiber...
In this paper, a study on AGV navigation system which is based on GPS/DR information fusion, in order to make AGV realize outdoor navigation with high-precision and low cost. In this system, we apply Kalman filtering algorithm on GPS signal and DR signal to make GPS signal and DR signal mutually compensate each other, and play each other advantages, so that we can obtain high-precision positioning...
The collision between right-turn vehicles and pedestrians non-motorized vehicle is very common in signalized intersections which are not set exclusive right-turn phase. As a result of the blind area caused by the difference of radius between inner wheels, the collisions become more possible and serious. Depending on incomplete statistics of Nanjing in 2011, the laws of collision between right-turn...
In order to realize real-time measurement based on image, proposes a design project of embedded image grabber and processing system based on camera link interface. The system adopts FPGA+DSP structure design. DSP used to process the image and send out processing results to external. FPGA adopts modularize design. It contains camera link interface module, image memory module, DSP connection module...
Aiming at the calculation problem of chaff preparing of mix-packed in a chaff bag, the new method of chaff preparing is bright forward. According to the chaff characteristic of frequency response, the model of single chaff RCS is established. The method can effectively achieve Chaff suppressive Jamming on all frequency, when considering radar countermeasure Intelligence.
Digital signal is a function of time, which is some physical quantities long with time transformation, and the original signal is decomposed into a series of approximate component and details component by wavelet analysis. The wavelet transform is used in digital signal processing for simulation in MATLAB platform, and giving an example analysis. The result shows that the choice of suitable wavelet...
A highly-efficient anonymous electronic voting scheme is proposed based on the combination of ring signature and blind signature. The scheme solves the problem of voters' identity divulges caused by excessive right from management institution or registration institution. The anonymity of voters' identity and the abstention problem can be guaranteed unconditionally. Also, the scheme guarantees the...
Based on the field data, remote sensing spectrum reflectance value of river suspended sediment in Huma abandoned gold mining areas, taking Landsat TM image as the main data, simulated and analyzed the spectral signature among 4 bands from the visible to the near-infrared of sandy water, and retrieved the suspended sediment concentration. The result indicates that the SSC has increased distinctly and...
Authoring system is one of the main sub systems in IETM system which is used to complete the transformation of technical information. Process data module organizes other data modules so as to realize the interactive module in the S1000D data module. This paper describes the design of a XML based data process module editor. Firstly, proposed process data module data model according to the S1000D standard,...
Grid Inverter Device is the core device to connect Micro power grid with utility grid. Before grid, it requests the output voltage of inverter device and voltage of power network with the same frequency and phrase. The paper presents the grid inverter device digital phase locker technique based on TMS320F2407. The simulation result show that output current can track the grid voltage quickly and reliably...
A Digital Research and Development (DRD) of All-Terrain Vehicle (ATV) styling Design Based on CATIA V5 approach is addressed. The main purpose is to enhance New Product Development (NPD) process's efficiency in ATV design by integrating Three Dimensional Optical Scanning Technology and Parametric Digital Design Technology. Digital R & D Based on CATIA is presented, which consist of Reversed Engineering...
For understanding the water quality state of Jialing River in Sichuan, the community structure characteristics of zooplankton were investigated in both dry and rainy seasons. By Shannon-wiener diversity index, Margalef richness index and Pielou evenness index and the combination of dominant species in the indicator species in the section was discussed. Results show that The zooplankton in this section...
Based on frequency method and threshold-based methodology, the critical rainfalls of 1h, 3h, 6h and 24h corresponding to the soil moisture content of 25%, 50%, 100% respectively were calculated, which can be used as flood warning standard. Take the DaPoLing basin as the case, with the application of contingency table, ten floods were chose to test the accuracy of flash flood warning method, the results...
As an important branch and the foundation in the field of computer vision, mobile objects detection technology have already been widely applied in industry, medical care, aerospace, military fields and so on, and becomes a hot spot in the research field of computer vision. This paper is based on the current research achievements, and makes a deep analysis detection of moving objects under the static...
The finger vein recognition is a rising way of biometric in recent years. The optical image quality of finger vein acquisition and the accuracy of vein pattern extraction are key issues. In this paper, a novel optical illuminating/detecting method was proposed for using in the near infrared finger vein image acquisition system, a finger vein pattern extraction method based on the maximum curvature...
With the rapid development of computer and network technology, the campus network function is getting more and more perfect. Web-based test system has become a powerful complement as well as a developing trend to modern test methods. Starting with a three-layer model of B/S structure and an ASP database access technology, the paper introduces the component and structure of web-based English test system,...
As the increase of online shopping, B2C (Business to Custom) e-commerce has entered a rapid phase of development in China. In the meantime, logistics is becoming the bottleneck of the development. Based on research and analysis of literature and statistics, combined with study on shopping and interview of typical B2C e-commerce websites, the thesis studies and analyses on logistics development and...
Ownership structure is one of the most important factors in corporation governance system. This paper studies the impact of pyramid ownership on capital structure using the listed private companies as sample. The number of middle shareholders and deviation between Control right and Cash flow are positive related to Asset-liability ratio. Pyramid type of ownership structure of listed companies tends...
With the continuous economic and urban development, urban water pollution issue looms large, enterprise sewage problem becomes a topic of more and more universal concern. The government both serves for conservation of ecological environment and promoting economic development, however the enterprises always neglect urban environment pollution during pursuing the goal of profit maximization. This article...
Sludge is the main byproduct of wastewater treatment. Sludge drying process is considered to be the necessary approach for sludge treatment and disposal. The characteristics of sludge drying at different drying stage were experimentally investigated in a plate dryer. Sludge drying process were carried out at different operation parameters, such as different drying temperature, thickness of sludge...
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