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With the development of modern information technology, E-learning has become a new hot spot. As the core support system of E-Learning, online teaching platform has become one of the main directions of reform and development for modern educational technology. Through in-depth analysis, this paper explores and designs the process of web-quest teaching platform based on curriculums, building the structure...
With the continuous expanding of Internet scale, the network users and application increase rapidly and congestion control has become focus of network study. Several congestion control algorithms have been proposed out and improved for effective reduction of packet loss rate and for better utilization of network bandwidth. After analysis of several reasons causing network congestion, this paper presents...
A step-up/step-down k(=2, 3, ...)-Fibonacci switched-capacitor (SC) DC-DC converter is proposed in this paper. Unlike conventional Fibonacci step-up converter, the proposed converter can provide not only stepped-up voltages but also stepped-down voltages, where the k-Fibonacci ratios such as Tribonacci numbers, Tetranacci numbers, etc. are demonstrated by using the minimum number of capacitors. Concerning...
Existing surface reconstruction methods only work for low-dimensional, mostly 2D or 3D, data. In real applications, high-dimensional data is difficult to interpret as it requires more dimensions to represent. As a dimension reduction method, manifold learning provides an explicit representation for the useful implicit information hidden in the original feature space. But the internal topological and...
Because of the current search engines are mostly based on Chinese and English, the engines can provide the minority language search services are very small and the accuracy is low. We present a Dictionary-based multi-language Analyzer and Search Engine which can be used to analyze and search information on the Internet in minority languages such as Uighur, Tibetan, Mongol, Manchu etc. After preprocessed...
Recently, emergency early warning is a popular research area, the purpose of which is to prevent outbreak of the events endangering social stability. To establish the corpus of university emergency is the first step of the research. The paper discusses the current situation of the corpus. Then, we give the classification system of the university emergency. In the paper, we propose the basic framework...
A model of web data gathering and processing on Tibetan and Uyghur language is introduced in this paper, including page crawler, content extraction, word segmentation and frequency statistics and display. Firstly, It extracts the website's templates and use the template to extract the content and title of the web page, then the software transforms the HTML file to the XML file. The second step is...
ArcGIS Server and Flex technology, combined with the WebGIS technology, can be used to implement Web application of traditional knowledge database information system. The logical structure of the system is divided into three layers: presentation layer, services layer and database layer. Among them, the presentation layer uses Flex technology combined with rich internet application API provided by...
Google launched a new Android smart phone with the open source operating system when the smart phone system at the disputes. It uses Linux Core, and the members of OHA(Open Handset Alliance) can use and modify SDK bag at will, which open source of system makes it good expanding. This phone takes all software that smart phone needs when working, including operating system, user interface and application...
This paper focused on the basic status of the Beijing resident population of the minority population, industry structure, income, education and the extent proposed the idea of building a database of Beijing minority, and to clarify the construct ideas for Beijing minority Affairs management to provide information support to better decision-making for urban ethnic work.
The Latin transliteration schemes for the Chinese names have a great significance in the development of Mongolian corpus, lexical analysis and named entity recognition. There are many problems in the tagging of Chinese names at the present time, owing to which, the author puts forward schemes for Chinese names' Latin transliteration schemes based on the features of Chinese and Mongolian.
In this thesis, taking Guishan Han tomb 3D Visualization Simulation System as an example, an algorithm named half edge collapse mesh simplification based on constrained quadric error metric method(HECMSA-CQEM)is used to simplify the geometric models. Taking advantages of the progressive mesh, half edges are collapsed under constraining of quadric error metric method. As shown in experiment, the HECMSA-CQEM...
With the information technology gradually getting into people's lives, the multimedia technology has brought the convenience of high speed and high efficiency for our life, study and work. This paper firstly expounds the concepts of multimedia technology, then, it puts forward the construction of the model, including putting forward the model, elements, functions, and so on, finally, synthesized and...
A fast and reliable signal reconstruction algorithm is the core part of the compressed sensing (CS) theory. As a reconstruction algorithm, interior point method has a high precision but it is time-consuming and needs large computation, so it is difficult to meet the actual needs. In view of the above problems, in this paper we propose a design for interior point method that is based on the Field Programmable...
An improved multi-objective Genetic Algorithm based on agent is offered. In the improved algorithm, agents were co-evolution with different control parameters to increase the diversity of candidate solutions. Two kinds of crossover strategies of Arithmetic and Simulated binary (SBX) were introduced in order to complete the competition behavior of the agent, these strategies increased the choice range...
Electromagnetic ultrasound surface wave generated by combination of double magnets and the snake-shaped coil is widely used in the aluminum plate surface flaw detection. The electromagnetic ultrasonic transducer model is investigated and the theory analysis of electromagnetic ultrasound surface wave and numerical simulation of EMAT physical mechanism are discussed in this paper. Based on ANSYS, the...
This paper introduces the design method of variable frequency power based on IGBT and SPWM inverter technology. The drive signal of IGBT is SPWM wave produced by MCU, and then a undistorted sine signal can be obtained through the low pass filter. LED digital tube displays the voltage value for watching. The sine wave with stably frequency and high precision could be produced by this design.
This paper proposes a model to automatically extract Tibetan new valid words. Through building the dynamic Tibetan corpus from 2009 to 2012, which covers more than 18 Tibetan network media of Tibet, Qinghai, Sichuan, Gansu and Yunnan, we research on the key techniques of Tibetan new valid word extraction: (1) using statistical method to establish Tibetan new word knowledge base, (2) using information...
The soft PLC technology is a new technology which rise rapidly in the field of industrial automation. Soft PLC ladder based on IEC61131.3 standard development system were designed and implemented on the Windows platform. First introduced the structural design of the system, including the ladder editor, syntax checking, ladder diagram translate to Instruction List, and instruction list compilation...
This paper is about the application of the PROFIUBS technology which is used in the electrical control system of Fengchan River's purification project in Tianjin. The Profibus-dp card is designed which can convert the data format from PROFIBUS protocol to MODBUS protocol. The system taking IPC(Industrial Personal Computer) as the master station, using the configuration software to realize centralized...
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