Overview of machine learning applications in fusion plasma experiments on J-TEXT tokamak

Machine learning research and applications in fusion plasma experiments are one of the main subjects on J-TEXT. Since 2013, various kinds of traditional machine learning, as well as deep learning methods have been applied to fusion plasma experiments. Further applications in the real-time experimental environment have proved the feasibility and effectiveness of the methods. For disruption prediction, we started by predicting disruptions of limited classes with a short warning time that could not meet the requirements of the mitigation system. After years of study, nowadays disruption prediction methods on J-TEXT are able to predict all kinds of disruptions with a high success rate and long enough warning time. Furthermore, cross-device disruption prediction methods have obtained promising results. Interpretable analysis of the models are studied. For diagnostics data processing, efforts have been made to reduce manual work in processing and to increase the robustness of the diagnostic system. Models based on both traditional machine learning and deep learning have been applied to real-time experimental environments. The models have been cooperating with the plasma control system and other systems, to make joint decisions to further support the experiments.     

电子琴电声性能微机辅助分析测试系统

本文介绍了采用个人计算机和软件技术,通过IEEE-488总线控制通用测量仪表,运用计算铡量方法完成电子琴产品的电声性能检测。文中给出了系统硬件框图、工作原理和软件结构与测量子程序框图,同时还给出了系统测试结果,最后进行了音高测试误差分析。     

数字电视EMC测试用码流信号的配制

目前数字电视系统技术,测试标准以及测试设备还不够完善.本文对数字电视测试码流信号的进行研究,配制了一组适合EMC测试的码流信号,解决了数字电视EMC测试用码流信号难题.     

数字电视接收机EMC测试探讨

本文通过对数字电视接收机的EMC测试,介绍数字电视的抗干扰测试、数字电视与模拟电视相互干扰的特征,探讨数字电视的EMC抗扰能力及接收可靠性.     

HDTV数字电视EMC测试用码流制作

本文介绍了一种HDTV测试彩条码流信号的制作方法,可供从事HDTV测试工作的人员参考.     

扬声器综合参数CAT技术探讨

本文在对目前国内扬声器检测现状的分析基础上,提出应用CAT技术来改造扬声器的传统测试方式,提高检测效率和检测精度,并进行实验研究,按照GB9396—88《扬声器主要性能测量方法》,组建了CAT系统。文章根据实践阐述了实现扬声器CAT的基本思路、系统测量仪器配置以及程序测量方法,最后通过一组实验数据展示了系统运行效果。     

数字电视接收机的抗扰度测试

本文介绍数字电视的抗干扰测试系统、探讨数字电视的抗扰能力、接收可行性及干扰信号对图象质量影响的特征和客观分析方法。     

如何跟上日新月异的高清电视发展

为迎接2008奥运之年,各大电视企业开始在中国市场投放1080P全高清液晶和等离子电视,展开全高清市场争夺战。的确,通过各厂家精彩纷呈的节目演示,把产品凸显的是那么的动人或者诱人,高清数字电视竟然能够提供如此震撼的视觉享受。在浏览过电视产品之后有何感想?高清电视、全高清电视你又知多少,如此众多的品牌如何选择有无困惑?在目前高清数字电视国内普遍片荒的情况我们应当怎么办?等等,在下谈一些不全面的想法,提供大家参考。     

平板电视HDMI接口辐射干扰测试条件的建立

介绍 HDMI 接口特点及其在 HDTV 显示格式中的传输带宽,并探讨平板电视 HDMI 接口工作模式下辐射干扰测试条件的建立,以供从事 HDTV 测试人员参考。