SVG Technology Research Articles

Application research of digital metro map based on SVG technology: A case study of Shanghai metro

The digital metro map is an important basis for metro operation, management and passenger service. Passenger flow service and metro management under mass passenger flow conditions are difficult to complete because of the lack of unified map resources. With the development of metro construction, it is necessary to build an intelligent and functional unified digital metro map platform and map application service for the public and operation managers. To this end, the present study proposed a method of converting DXF drawing into SVG maps and a 3D visualization method based on SVG map data. Based on SVG technology, a digital metro map platform was built. Taking Shanghai Metro as an example, the standardization of geographic information objects and map drawings of the Shanghai Metro were realized. The SVG digital map of the Shanghai Metro was drawn. The visualization service based on SVG map was provided. And the digital metro map platform was tested. The results showed that the map conversion method and 3D visualization method were feasible. And the expected metro map functions of the map platform can be realized.

Quality Data Collection and Quality Monitoring of Smart Electric Energy Meter Based on Acceleration Sensor

In order to solve the problem of frequent switching and tripping of intelligent power meter and ineffective power failure, a quality data collection and quality monitoring based on acceleration sensor is proposed. Firstly, this paper briefly describes the objects and methods of quality data acquisition and quality monitoring of intelligent watt hour meter. At the same time, based on the analysis of the requirements of quality data acquisition and quality monitoring of intelligent watt hour meter and based on B/S architecture, the quality data acquisition and quality monitoring framework of intelligent watt hour meter is designed. Finally, an intelligent power meter quality monitoring interface with friendly interactive and real-time display acceleration sensor is built using SVG and JavaScript technology. The results show that the collection and monitoring data based on acceleration sensor, three batches of three-phase 0.2 intelligent electric energy meters, meet the operation requirements. Among them, the batch failure rate and classification failure rate in the operation of the third batch are low, and the sampling qualified rate is high, which is an excellent level. The intelligent power meter quality data collection and monitoring system of acceleration sensor can also meet the requirements of full life cycle monitoring of intelligent energy meter quality. It provides a new method for the data acquisition of intelligent electric energy meter and hopes to provide some references for the timely discovery and solution of the quality problems of intelligent electric energy meter in the future.

Analytical Study on the Loss Reduction of Static Var Generator for Power Grid Based on the Soft Switch Technology

With SVG technology becoming more and more mature, chain SVG is also installed in some power grid substations to solve local power quality problems, and certain effect has been achieved. Compared with other compensators in the substations, for example, capacitor bank, SVQC, SVC etc, actual loss of SVG is above average level, this limits its practicability.This paper puts forward a method that utilizes soft switch technology to reduce IGBT on/off loss in SVG device, gives main circuit topology of the designed soft switch PWM inverter, and the comparative analysis with on/off loss of hard switch, proves effectiveness of this method.

A method based on graphic entity for visualizing complex map symbols on the web

A method based on graphic entity for map symbol visualization in vector-based web mapping is proposed. The method is especially effective for complex geological symbols. It has three parts: graphic entity library, symbol synthesizer, and synthesis specifications. The design process is described as the application of the method to symbols representing point, line, and polygon features in web mapping. The method works with Flash, SVG, or other mapping technologies. We chose Flash to visualize geological disaster information for the Guangdong province in China. The case study demonstrates that this graphic entity-based method can meet the demands for interactive symbolization and complex symbol visualization in Internet web mapping. It produces good results, is fast, and is easy to operate. This makes it especially suitable for web-mapping applications, especially vector-based and hybrid WebGIS applications which display complex symbols.

Research on Critical SVG Technology for Low Voltage High Power Load

impact loads, such as submerged arc furnace, are often used in the smelting industry, their features include high power, low voltage, high current, rated power is from several MVA to tens of MVA, rated voltage is less than 200V. Reactive and harmonic compensation scheme for such load is generally centralized compensation on high voltage side of the power grid, facts have proved that, the effect of such compensation mode is not satisfactory to customers. Therefore, people have designed a special low voltage high power SVG, which is installed on the low voltage side for compensation, it could perform reactive power compensation, and filter out harmonic, protect against grid voltage fluctuation and flicker caused by submerged arc furnace in different production periods effectively.Compared with common SVG project, how to guarantee safe and stable operation of the equipment under high current conditions is critical technical issue in the design. This paper takes an example of an actual project, designs water-cooled copper pipe bus as connecting bus of low voltage high power SVG. Rationality and feasibility of this design has been proved in actual equipment operation.

Research and Application of SVG in the Feeder Data Analysis System Based on Ajax

It researched key technology based on ajax of svg in feeder data analysis system, for the requirement of complicated circuit quick analysis and high efficiency in aviation arming ensure domain, combined with S1000D specification for interactive electronic technical manuals and data requirements of creative thinking, proposed feeder S1000D data modules and svg technology dynamic publishing model,and the application of research results, case study results show that: The design can be automatically and quickly analyze circuit through the auxiliary equipment, leads the list of inter-path, achieve troubleshooting.

Static Var Generator Technology and its Applications

This paper analyzed the principles, the control methods, the features of the three operational patterns, and the merits of SVG technology as well as a brief introduction to the latest applications of SVG technology. Due to the limitations of the SVG technology, meanwhile its control strategies are very complicated; its fabrication cost is comparatively high when used to for the middle and high electricity pressure and big capacities of electricity transmission. But with the wide use of new technologies and new materials, the SVG technology will surely finds its broad applications.

Web GIS Research and Application Based on SVG

In this paper we use the SVG technology to the field of Web GIS and set up the Traffic Accident Scene Management System (TASMS). Using text format characteristics of SVG, combined with ASP.NET technology and the scripting language JavaScript, we achieved dynamically load geographic information image, quick query and some user interaction functions.

Application of WebGIS in Process Management of Highway Bridge

According to Road Course management characteristics, this System was built based upon WebGIS technology , SVG technology, Ajax technology and database technology. This paper discussed the main designment solution of this system and to realize bridge CAD map to ZommIn, ZommOut, Pan, Theme, Edit function and so on。

Architectural impact of the SVG-based graphical components in web applications

The present work is intended for showing the architectural impact in the use of the WIMP components present in the graphic user interface (GUI) using the SVG technology. We have made several experiments in a client server environment and we measured the CPU utilization, memory usage and response time when SVG-based graphical component are used in WEB applications. We use three navigators (Internet Explorer, Firefox and Opera), and we analyzed as those metrics changes when single and complex images are used, and we note a good behavior of the SVG format since our test obtained a confidence level superior to 95%.