Results 81 to 90 of about 2,065,537 (339)

Accelerated Charge Dissipation by Gas-Phase Fluorination on Nomex Paper

open access: yesApplied Sciences, 2019
The surface charge and space charge accumulation in paper used in oil−paper insulation system may distort electric field distribution and lead to the flashover and breakdown of insulation system.
Feipeng Wang   +8 more
doaj   +1 more source

Pattern recognition in power-system security

open access: yesInternational Journal of Electrical Power & Energy Systems, 1984
Abstract Power system security assessment is of great importance in power-system operation. To date, security evaluation has consisted of occasionally performing load flows and transient stability studies by computer simulation of current system status or by applying conventional direct methods. This type of security evaluation is very time-consuming
J.M.G. Sa Da Costa, N. Munro
openaire   +1 more source

INTERNATIONAL STABILITY AND SECURITY IN CONDITIONS OF POWER ASYMMETRY: PRESENT STATE OF PLAY AND FUTURE TREND [PDF]

open access: yes, 2012
Power asymmetry within the international security system can be noticed both at conceptual and practical level. Although it is not a new phenomenon, this asymmetry, which has extended for the past decades, has led to some particular developments that ...
Ionel STOICA
core  

In Situ Study of Resistive Switching in a Nitride‐Based Memristive Device

open access: yesAdvanced Functional Materials, EarlyView.
In situ TEM biasing experiment demonstrates the volatile I‐V characteristic of MIM lamella device. In situ STEM‐EELS Ti L2/L3 ratio maps provide direct evidence of the oxygen vacancies migrations under positive/negative electrical bias, which is critical for revealing the RS mechanism for the MIM lamella device.
Di Zhang   +19 more
wiley   +1 more source

Streamer characteristics of dielectric natural ester-based liquids under long gap distances

open access: yesAIP Advances, 2018
Natural esters, as the renewable resources, offer excellent physiochemical and dielectric properties such as the fire-resistance, high biodegradability and satisfactory dielectric breakdown performance. Thus, natural esters are selected as the insulation
Zhengyong Huang   +7 more
doaj   +1 more source

Testing Method for Composite Insulators Interface Based on Nonlinear Ultrasonic

open access: yesIEEE Access, 2019
The interface is the weakness of composite insulators. As the interface bonding fails, the uniform distribution of electric field will be affected, which accelerates the aging of composite insulators and affects the safe operation of transmission lines ...
Sida Zhang   +4 more
doaj   +1 more source

Security Assessment and Impact Analysis of Cyberattacks in Integrated T&D Power Systems [PDF]

open access: green, 2021
Ioannis Zografopoulos   +4 more
openalex   +1 more source

Deconstructing the Blockchain to Approach Physical Limits [PDF]

open access: yes, 2018
Transaction throughput, confirmation latency and confirmation reliability are fundamental performance measures of any blockchain system in addition to its security. In a decentralized setting, these measures are limited by two underlying physical network
Bagaria, Vivek   +4 more
core   +1 more source

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou   +15 more
wiley   +1 more source

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