Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Energy Losses in Transformers01:21

Energy Losses in Transformers

859
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
859
Types Of Transformers01:16

Types Of Transformers

964
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
964
Transformers in Distribution System01:27

Transformers in Distribution System

99
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
99
Instrument Transformers01:23

Instrument Transformers

81
Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
81

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Monolithic additive manufacturing of a fluid-structure coupled architected cellular mechanical system for rate-adaptive enhanced energy dissipation.

Materials horizons·2026
Same author

Can focal nodular hyperplasia transform into hepatocellular carcinoma? A 20-year journey from benign to malignant.

BMJ case reports·2026
Same author

Impact of learning phase on complications and oncological quality in robotic left-sided pancreatectomy: A multicenter international analysis.

Surgery·2026
Same author

Anatomical versus non-anatomical liver resection for hepatocellular carcinoma - an international multicenter propensity score-matched analysis of short- and long-term outcomes in an international multicenter cohort.

HPB : the official journal of the International Hepato Pancreato Biliary Association·2026
Same author

Improving Clinical Teaching Fellow Handover and Induction Preparedness: A Completed Closed-Loop Clinical Audit at Sandwell and West Birmingham Hospitals NHS Trust.

Cureus·2026
Same author

Molecular insights and antibiotic resistance genes characterization in clinical Vibrio cholera isolates from patients in Peshawar, Pakistan.

Molecular biology reports·2026

相关实验视频

Updated: Jun 20, 2025

Design and Analysis for Fall Detection System Simplification
08:05

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

10.7K

使用变压器网络编码器和数据融合的无标签室内摔倒检测.

Muhammad Zakir Khan1, Muhammad Usman2, Jawad Ahmad3

  • 1University of Glasgow, James Watt School of Engineering, Glasgow, G12 8QQ, UK.

Scientific reports
|July 21, 2024
PubMed
概括

这项研究引入了一种用于老年人摔倒检测的新型射频识别 (RFID) 系统,为可穿戴设备提供了一种舒适的非接触式替代方案. 该系统使用被动超高频 (UHF) 标签和变压器模型来准确识别掉落.

更多相关视频

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.3K
A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images
04:23

A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

Published on: April 21, 2023

1.8K

相关实验视频

Last Updated: Jun 20, 2025

Design and Analysis for Fall Detection System Simplification
08:05

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

10.7K
Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.3K
A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images
04:23

A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

Published on: April 21, 2023

1.8K

科学领域:

  • 工程 工程师 工程师 工程师
  • 计算机科学 计算机科学
  • 老年学是一门学科.

背景情况:

  • 用于老年人摔倒检测的可穿戴设备可能会不舒服,并影响用户体验.
  • 现有的方法通常需要近距离或多个传感器来进行可靠的监控.

研究的目的:

  • 使用RFID技术为老年人开发一种非接触式,不引人注目的跌倒检测系统.
  • 为了评估变压器模型的性能,与数据融合相结合,以提高掉落检测的准确性.

主要方法:

  • 使用一种被动的超高频 (UHF) 标签阵列进行不显眼的监控.
  • 处理了来自无电池标签的接收信号强度指示器 (RSSI) 和相位数据.
  • 采用了具有数据融合的变压器模型,用于活动识别和落检测.

主要成果:

  • 实现了超越CNN,RNN和LSTM方法的平均跌落检测准确度.
  • 证明了超出3米范围的可靠性能,使用最小的UHF标签和单个天线.
  • 无接触式RFID方法被证明是实用的和具有成本效益.

结论:

  • 拟议的基于RFID的系统为老年人跌倒检测提供了一个有希望,准确和用户友好的解决方案.
  • 与数据融合相结合的变压器模型显著提高了落检测能力.
  • 这项技术为传统可穿戴传感器提供了可行的替代方案.