In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML...In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML)5 is proposed.The characteristics of the real-time monitoring technology of CNC machine tools under the traditional Client/Server(C/S)structure are compared and analyzed,and the technical drawbacks are proposed.Web real-time communication technology and browser drawing technology are deeply studied.A real-time monitoring and visible system for CNC machine tool data is developed based on Metro platform,combining WebSocket real-time communication technology and Canvas drawing technology.The system architecture is given,and the functions and implementation methods of the system are described in detail.The practical application results show that the WebSocket real-time communication technology can effectively reduce the bandwidth and network delay and save server resources.The numerical control machine data monitoring system can intuitively reflect the machine data,and the visible effect is good.It realizes timely monitoring of equipment alarms and prompts maintenance and management personnel.展开更多
超文本传输协议(Hyper Text Transfer Protocol,HTTP)隧道具有穿越防火墙和规避入侵检测系统识别的能力,给信息安全带来严重威胁。然而现阶段的HTTP隧道检测方法识别能力不足、难以应对特征复杂的HTTP隧道。文中分析了HTTP隧道数据包与...超文本传输协议(Hyper Text Transfer Protocol,HTTP)隧道具有穿越防火墙和规避入侵检测系统识别的能力,给信息安全带来严重威胁。然而现阶段的HTTP隧道检测方法识别能力不足、难以应对特征复杂的HTTP隧道。文中分析了HTTP隧道数据包与正常HTTP数据包之间的差别,针对目前HTTP隧道检测方法存在的不足,提出了一种仅需提取小部分流量数据的基于卷积神经网络的HTTP隧道检测方法。实验结果表明,基于卷积神经网络的HTTP隧道检测方法能有效识别网络中的HTTP隧道流量,检测精确率、召回率、F1分数均达到99%以上,且不需要人工选择大量的专家特征,对网络流量监管有重要意义。展开更多
为全面优化Web前端界面综合性能,保障各个功能模块间良好通信,提升前端界面运行流畅性,本研究将超文本标记语言第5版本(Hyper Text Markup Language,HTML5)应用于Web前端开发中。对HTML5在Web前端开发中的应用现状进行分析,并深度探究We...为全面优化Web前端界面综合性能,保障各个功能模块间良好通信,提升前端界面运行流畅性,本研究将超文本标记语言第5版本(Hyper Text Markup Language,HTML5)应用于Web前端开发中。对HTML5在Web前端开发中的应用现状进行分析,并深度探究Web前端系统和HTML5关键技术之后,进一步融合模型、视图、控制(Model-View-Controller,MVC)开发模式,构建基于基础视图层、核心逻辑层、数据模型层的数据可视化(Data Visualization Layout,DVL)框架。以此实现在服务器端、前后端之间的有效通信;完善Web前端界面与响应指令的直接连接;促进前端场景有效集成与渲染;建立Web前端表单,保障前端展示信息的完善性。展开更多
文摘In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML)5 is proposed.The characteristics of the real-time monitoring technology of CNC machine tools under the traditional Client/Server(C/S)structure are compared and analyzed,and the technical drawbacks are proposed.Web real-time communication technology and browser drawing technology are deeply studied.A real-time monitoring and visible system for CNC machine tool data is developed based on Metro platform,combining WebSocket real-time communication technology and Canvas drawing technology.The system architecture is given,and the functions and implementation methods of the system are described in detail.The practical application results show that the WebSocket real-time communication technology can effectively reduce the bandwidth and network delay and save server resources.The numerical control machine data monitoring system can intuitively reflect the machine data,and the visible effect is good.It realizes timely monitoring of equipment alarms and prompts maintenance and management personnel.
文摘超文本传输协议(Hyper Text Transfer Protocol,HTTP)隧道具有穿越防火墙和规避入侵检测系统识别的能力,给信息安全带来严重威胁。然而现阶段的HTTP隧道检测方法识别能力不足、难以应对特征复杂的HTTP隧道。文中分析了HTTP隧道数据包与正常HTTP数据包之间的差别,针对目前HTTP隧道检测方法存在的不足,提出了一种仅需提取小部分流量数据的基于卷积神经网络的HTTP隧道检测方法。实验结果表明,基于卷积神经网络的HTTP隧道检测方法能有效识别网络中的HTTP隧道流量,检测精确率、召回率、F1分数均达到99%以上,且不需要人工选择大量的专家特征,对网络流量监管有重要意义。
文摘针对利用MATLAB官方提供的Web组件将在线虚拟仿真实验平台打包部署到Web端后,客户端出现浏览器端加载应用程序缓慢的问题,文章不使用MATLAB官方的Web组件,在使用超文本标记语言(HyperText Markup Language,HTML)和Vue搭建前端界面的同时,使用异步Web框架FastAPI搭建后端应用程序接口(Application Program Interface,API)并进行服务部署。开展数字信号处理中的图像处理实验,结果表明文章提出的方法可有效地解决Web应用加载速度缓慢等问题。
