Results 31 to 40 of about 88,903 (169)

A Denoising Diffusion Probabilistic Model-Based Human Respiration Monitoring Method Using a UWB Radar

IET Signal Processing
Real-time respiratory monitoring when sleeping is crucial for sleep apnea, chronic obstructive pulmonary disease, sleep quality assessment, and other issues related to the tracking of human health status.
Ping Wang, Haoran Liu, Xiusheng Liang, Zhenya Zhang   +3 more
doaj   +1 more source

Purification Method of Exchangeable Cations of Calcium Bentonite

Kuangchan zonghe liyong
The properties of bentonite are influenced by the type and content of exchangeable cations. The content of single-type cations can be increased by purification, thereby improving the properties of bentonite (such as the properties of adsorption ...
Xueying PAN, Liuyang QIN, Jingru JI, Konglei CHEN, Yanping ZHAO, Qin ZHANG   +5 more
doaj   +1 more source

Precise Optical Modeling of Phosphor-Converted LEDs With Arbitrary Concentration and Thickness Using Bidirectional Scattering Distribution Function

IEEE Photonics Journal, 2018
Phosphor-converted light-emitting diode (pcLED) is one of the most promising methods to generate white light. The interaction of the excitation light with the phosphor in pcLED is a complicated phenomenon, combining light absorption, light conversion ...
Jia-Sheng Li, Yong Tang, Zong-Tao Li, Jia-Xiao Chen, Xin-Rui Ding, Bin-Hai Yu   +5 more
doaj   +1 more source

Research on OPF Control of Three-Phase Four-Wire Low-Voltage Distribution Network considering Uncertainty

International Transactions on Electrical Energy Systems
As power systems become more complex and uncertain, low-voltage distribution networks face numerous challenges, including three-phase imbalances caused by asymmetrical loads and distributed energy resources.
Rui Wang, Xiaoqing Bai, Shengquan Huang, Shoupu Wei   +3 more
doaj   +1 more source

Transformer maintenance decision based on condition monitoring and fuzzy probability hybrid reliability assessment

IET Generation, Transmission & Distribution, 2023
Equipment maintenance decision is a very critical technology in power grid asset management. The traditional maintenance decision focuses on the analysis of the operation performance of the equipment itself, but lacks the analysis and description of the ...
Dabo Zhang, Zhuwei Chu, Qianjin Gui, Fan Wu, Hejun Yang, Yinghao Ma, Weiqing Tao   +6 more
doaj   +1 more source

Savings in Cooling Energy with a Thermal Management System for LED Lighting in Office Buildings

Energies, 2015
Light-emitting diode (LED) lighting should be considered for lighting efficiency enhancement, however, waste heat from light-emitting diode (LED) lighting increases the internal cooling load during the summer season.
Byung-Lip Ahn, Ji-Woo Park, Seunghwan Yoo, Jonghun Kim, Seung-Bok Leigh, Cheol-Yong Jang   +5 more
doaj   +1 more source

Influence of dilution parameters on the internal flow field and dilution ratio of a particulate matter sampling diluter

Energy Science & Engineering, 2023
Dilution sampling systems are crucial for obtaining accurate measurements of engine exhaust particulate mass and number. The system design requires a comprehensive understanding of the impact of dilution parameters on its internal flow field and dilution
Hongliang Xiao, Yonggang Xiao, Limin Geng, Hao Chen   +3 more
doaj   +1 more source

Black-Box Behavioral Modeling of Voltage and Frequency Response Characteristic for Islanded Microgrid

Energies, 2019
The voltage and frequency response model of microgrid is significant for its application in the design of secondary voltage frequency controller and system stability analysis. However, most models developed for this aspect are complex in structure due to
Yong Shi, Dong Xu, Jianhui Su, Ning Liu, Hongru Yu, Huadian Xu   +5 more
doaj   +1 more source

Optimal layout of pressure monitoring points in water supply network based on Optics

E3S Web of Conferences, 2019
It is necessary to monitor the pressure in the networks in real time, when we face the problem of pipe burst and leakage in urban water supply network. Therefore, it is particularly important to arrange pressure monitoring points in appropriate places in
Xie ChenLei, Fang QianSheng, Zhang HongYan, Zhang JiXin   +3 more
doaj   +1 more source

Investigation on combustion and emission characteristics of diesel polyoxymethylene dimethyl ethers blend fuels with exhaust gas recirculation and double injection strategy

Journal of Traffic and Transportation Engineering (English ed. Online)
As a kind of renewable and high oxygen content fuel, polyoxymethylene dimethyl ether (PODE) can be added in diesel to realize energy saving and emissions reduction.
Xin Su, Rui Su, Nan Gao, Hao Chen, Zhenhua Ji, Hongming Xu, Biao Wang   +6 more
doaj   +1 more source