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文中介绍了EXE文件固化时文件格式转换的实现思想,并给出实现的源程序,该思想适用于其他格式文件固化时文件格式的转换。 相似文献
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关于对MSN文件传输特点及其还原的研究 总被引:1,自引:1,他引:0
MSN作为时下国内外都比较流行的一款即时通信软件,拥有比较广泛的用户群。探讨了即时通信软件MSN在文件传输时的特点,重点对MSN传输特定格式文件时的特征给予了分析和研究,针对诸如PDF与PPT等文件格式的文件在明文传输时,因其在文件首部会有特定文件结构特征串,从而可以根据这一特点确定MSN有传输文件的行为。并在基于特定文件格式特征串对MSN传输的文件实现了数据还原,旨在为数据恢复提供新的研究思路。 相似文献
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在目前播出系统设备的数字化改造中,通常采用格非MagiStream视频服务器构建硬盘播出系统,但是由于格非硬盘播出系统文件格式的特殊性,一些标准的MPEG-2文件无法直接在格非播出系统中播出,需要通过视频上载方式或格非上载软件的转码上传完成。为了提高播出系统的工作效率,在详细解析格非视频文件、音频文件和索引文件的基础上,找出了标准的MPEG-2视频文件和PCM音频文件与其的差异,并给出了播出系统节目素材转码软件的设计方法。 相似文献
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提出一种利用XML和Excel设计动态通用报表系统的新方法。首先对Excel报表模板进行分解,生成报表模板的报表信息、架构信息和映射信息,再根据统计模板生成统计分析信息,这些信息均以XML文档的形式存入数据库。在系统运行时,将用户上报的Excel文件中的报表数据提取出来,以XML文档的形式存入数据库。然后结合XPath和XQuery对报表数据进行统计分析,得到统计报表数据。最后将统计报表数据组装为Excel文件输出给用户。采用这种方法设计的报表系统动态灵活、通用性强。 相似文献
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随着智能终端技术的发展,越来越多的产品数据需要借助移动终端进行访问。为提高用户体验,通常需要对产品数据进行轻量化处理。文中针对计算机辅助设计产生的图纸进行轻量化技术处理,在分析DWG和SWF文件格式的基础上,将DWF格式转换为适合网络流式传输的SWF格式,并基于Flex和Action Script技术实现了扩展现有的SWF浏览器,使其对流化后的SWF文件具有在线编辑功能。并将实现的组件应用于产品数据轻量化访问系统,从而验证了所提出方案的可行性。 相似文献
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General design criteria for developing a software system capable of translating files from one set of simulation tools to another are discussed. The emphasis is on the data and control structures applicable in the development of such a system. The guidelines lay the foundation for the translation software. Additional design criteria may be necessary and will vary depending on the specific application. A software package that translates simulation programs (written in a language known as SALSIM) to stimulus files (written in a format known as Sentry) is presented 相似文献
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在某项目开发过程中,为了满足数据采集系统中DSP应用程序在线FLASH更新的需求,首先借助Tornado开发环境自带的FTP服务器将应用程序下载到系统控制器内存,再封装成数据包分次传输,最后实现应用程序更新。该方案解决了某些应用场合下数据转存空间小于需要传输的文件时需分包多次传输的问题,整个软件开发过程都是在Tornado开发编译环境下进行的,能够完成对应用程序文件进行分包无差错传输。实际应用表明,按照该方案设计的软件程序可以很好地实现FLASH在线更新,具有分包传输、数据准确的特点,达到了设计要求。 相似文献
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符号仿真在电路教学中的应用 总被引:2,自引:0,他引:2
介绍了符号运算语言的特点,并利用MATLAB的符号运算功能编写一MATLAB程序“Circuit.m”,通过节点列表法,实现了任意线性电路的自动解析求解,为电路分析及电路教学提供了一个有效的辅助工具。另外,该电路符号仿真软件的电路描述文件采用了与PSPICE一致的格式,故易于为广大电路分析及电路教学工作者所接受。 相似文献
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Jao C.S. Hier D.B. Brint S.U. 《IEEE transactions on information technology in biomedicine》1999,3(1):70-73
Downloading medical images on the Web creates certain compromises. The tradeoff is between higher resolution and faster download times. As resolution increases, download times increase. High-resolution (photographic quality) electronic images can potentially play a key role in medical education and patient care. On the Internet, images are typically formatted as Graphics Interchange Format (GIF) or the Joint Photographic Experts Group (JPEG) files. However, these formats are associated with considerable data loss in both color depth and image resolution. Furthermore, these images are available in a single resolution and have no capability of allowing the user to adjust resolution as needed. Images in the photo compact disc (PCD) format have higher resolutions than GIF or JPEG, but suffer the disadvantage of large file sizes leading to long download times on the Web. Furthermore, native Web browsers are not currently able to read PCD files. The FlashPix format (FPX) offers distinct advantages over the PCD, GIF, and JPEG formats for display of high-resolution images on the Web. A Java applet can be easily downloaded for viewing FPX images. FPX images are higher resolution than JPEG and GIF images. FPX images offer rich resolutions comparable to PCD images with shorter download times 相似文献
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Geometry coding and VRML 总被引:14,自引:0,他引:14
Taubin G. Horn W.P. Lazarus F. Rossignac J. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1998,86(6):1228-1243
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Michael R. Kobe Edgar Sánchez-Sinencio Jaime Ramírez-Angulo 《Analog Integrated Circuits and Signal Processing》1993,3(3):243-258
An integrated software system that facilitates the design, and integrated-circuit layout of continuous-time OTA-C filter biaquad-based structures with typical cutoff frequenceis for a 3µm technology in the 500 kHz-8 MHz range is described. The proposed integrated software system consists of three separate software modules written in the C language for the Apollo workstation (DN3000). The first module is a general filter approximation package. This program can approximate conventional magnitude, arbitrary magnitude, arbitrary group delay equalizer, arbitrary magnitude with group delay specifications. The second module aides in the synthesis of the biquad-based OTA-C filter structures. This module is unique in that the C code has the rule-based language CLIPS embedded within the code, and takes into account OTA-C filter nonidealities. An expert system using CLIPS was developed to select an appropriate OTA-C filter structure based on the nonidealities of the structures. After the filter structure has been chosen, the program will guide the user in the calculation of the capacitor values. These calculations are based on the nonidealities of the OTAs included in the standard cell library for layout, in addition the design of special purpose OTA as another alternative is also considered. Furthermore, the program will develop the necessary input files for the layout generator. The final module is a modified version of AIDE2, a standard cell layout generator for switched-capacitor circuits. The input files to the modified AIDE2 is a C language program that describes the circuit (i.e., standard cells and their netlist). The output file is a CALTECH Intermediate Format (CIF) file that is required for fabrication.1. The first version of FIESTA [22] was written in basic for personal computers and it is a primitive (and reduced) version of the second version here discussed.2. Not yet implemented in current version of FIESTA.3. In figure 3 the input currentsI
in
1,I
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3 can be implemented using OTAs.4. The OTA-C filter can be tuned using the tail currents of the OTAs. Therefore, the capacitors do not need to be any exact value. 相似文献
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基于Matlab的雷达系统仿真软件包设计与实现 总被引:1,自引:0,他引:1
针对雷达系统抽象复杂的特征,利用Matlab的图形用户界面开发设计出一套包含密码登陆界面、雷达系统主界面和各子界面的软件包,以方便教师教学和学生自学。在实现过程中引入Matlab,VC混合编程方法,以充分利用两种语言的各自优势。在VC环境下编写mexrun函数并通过混合编程生成MEX文件,编译后产生的动态链接库文件可以供Matlab调用。在Matlab平台的实验界面设计中提高了软件运行效率,精简了程序代码。运行结果表明,该软件包具有友好的用户界面、详细的雷达系统分析实例和强大的人机交互功能。 相似文献
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VB6在CSV文件格式处理中的应用研究 总被引:1,自引:0,他引:1
CSV文件是一种通用的文件格式,常用于不同程序之间数据的交互.但在对其内容的编辑过程中,由于编辑器本身的限制,往往使得编辑保存后的文件内容格式发生改变,进而影响CSV文件的使用.采用VB6程序设计语言,在实现对某一类CSV文件常规编辑的同时,确保其内容格式不发生改变. 相似文献
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介绍了基于VxWorks嵌入式操作系统下雷达终端显示软件对显示画面截图的实现技术。该技术使用Open-GL图形接口的帧缓存获取雷达屏幕航迹图形信息数据,并将该数据以标准的BMP图形文件格式保存。该BMP图形格式文件在Windows操作系统下可以被一些通用的图形软件浏览。 相似文献