XSZ-4型显微镜电子变压器的原理与维修

本文介绍了XSZ-4型显微镜电子变压器电路原理、元器件选择与故障维修.     

变压器联接组实验的原理探讨

本就电机与拖动课程中“三相变压器联接组实验”方法的依据原理进行讨论。     

改进教学仪器设备与改善实验条件的探索

改进教学实验设备,增强设备的安全性,是遵循学生在实验教学过程中安全第一、以人为本的基本原则,是建设和谐校园的重要组成部分。     

基于 LPC2136 的电力变压器防盗报警系统

电力变压器的屡屡被盗,严重破坏了电力系统正常的生产秩序,影响了经济建设和城乡居民的正常生产生活。笔者设计的基于 LPC2136的电力变压器防盗报警系统以 LPC2136为主控核心,采用先进的 MD72双频通讯模块,太阳能独立供电,模块最小化设计,体积小重量轻,功能容易拓展,有广泛的应用前景。     

牵引变电所微机智能电压选取装置 研究

提出了一种智能电压选取装置,利用微机,通过判别相关开关位置状态,实现牵引变电所27.5kV侧母线电压的智能化自动选取和切换,并深入分析了其工作原理和硬件组成。     

反激电路的变压器设计

介绍了UPS中常用的辅助电源拓扑-反激电路。详细分析了反激电路工作原理,重点围绕着反激电路能量传递的核心-隔离变压器,进行讨论。详细介绍了变压器的设计方法,并进行了实践。     

An extract-then-abstract based method to generate disaster-news headlines using a DNN extractor followed by a transformer abstractor

Generating news headlines has been one of the predominant problems in Natural Language Processing research. Modern transformer models, if fine-tuned, can present a good headline with attention to all the parts of a disaster-news article. A disaster-news headline generally focuses on the event, its effect, and the major impacts, which a transformer model lacks when generating the headline. The extract-then-abstract based method proposed in this article improves the performance of a state-of-the-art transformer abstractor to generate a good-quality disaster-news headline. In this work, a Deep Neural Network (DNN) based sentence extractor and a transformer-based abstractive summarizer work sequentially to generate a headline. The sentence extraction task is formulated as a binary classification problem where the DNN model is trained to generate two binary labels: one corresponding to the sentence similarity with ground truth headlines and the other corresponding to the presence of disaster and its impact related information in the sentence. The transformer model generates the headline from the sentences extracted by the DNN. ROUGE scores of the headlines generated using the proposed method are found to be better than the scores of the headlines generated directly from the original documents. The highest ROUGE 1, 2, and 3 score improvements are observed in the case of the Text-To-Text Transfer Transformer (T5) model by 17.85%, 38.13%, and 21.01%, respectively. Such improvements suggest that the proposed method can have a high utility for finding effective headlines from disaster related news articles.     

基于神经网络的变压器早期故障诊断安全技术

介绍了油中气体分析法中最常用的判断方法--罗杰斯三比值法.应用BP神经网络方法,建立变压器故障检测的BP网络模型,经过训练,对变压器故障进行早期诊断,运行结果与实际相符.     

基于OPC的变电所实时数据采集系统设计

研究了基于OPCSERVER的变电站综合自动化系统(实时数据采集模块),此方案具有用户操作简单、实时数据可靠性高等优点。所做的主要工作如下:(1)介绍了OPE基本概念及其工作的一般原理;(2)阐述了变电站综合自动化系统(实时数据采集模块)的系统结构及数据结构等。     

从变压器教学看存在的问题

从变压器的教学可见目前物理教学中存在的问题 :基本规律未讲深讲透 ,实际应用相当薄弱 ,与教学相关的习题明显脱离实际。产生问题的重要的原因是片面追求升学率