Results 21 to 30 of about 4,436,913 (350)

Developing a Model of Estimating the Failure Rate for Main Urban Water Pipes Using Gene Expression Programming [PDF]

open access: yesعلوم و مهندسی آب و فاضلاب, 2022
One of the major problems with urban water supply networks is the large volume of water wastage due to various incidents that cause damage. These damages are mainly irreversible and costly; thus, it is increasingly important to understand the causes of ...
Seyed Azim Hosseini   +1 more
doaj   +1 more source

Selected Aspects of Analyses of Failure Rates of Active Safety Systems in Buses

open access: yesCommunications, 2014
The article outlines the methodology of statistical analysis of failure rate of active safety systems in buses. The theoretical discussion is illustrated with calculations carried out on the basis of empirical data covering a four-year period of ...
Pawel Drozdziel   +3 more
doaj   +1 more source

A New Family of Extended Lindley Models: Properties, Estimation and Applications

open access: yesMathematics, 2020
There are many proposed life models in the literature, based on Lindley distribution. In this paper, a unified approach is used to derive a general form for these life models.
Abdulrahman Abouammoh, Mohamed Kayid
doaj   +1 more source

Analysis of System-Failure Rate Caused by Soft-Errors using a UML-Based Systematic Methodology in an SoC [PDF]

open access: yes, 2007
This paper proposes an analytical method to assess the soft-error rate (SER) in the early stages of a System-on-Chip (SoC) platform-based design methodology.
Benso, Alfredo   +6 more
core   +2 more sources

Comparison of maintenance scheme effects on power transformer reliability performance

open access: yesIngeniería e Investigación, 2015
Power transformer failures have a significant impact on electrical systems reliability, as they compromise the electricity delivery. Failures impact the operational cost of electric utilities as they endanger the accomplishment of power commitments ...
Ivan Camilo Duran Tovar   +3 more
doaj   +1 more source

Systematic Effectiveness Assessment Methodology for Fault Current Indicators Deployed in Distribution Systems

open access: yesEnergies, 2018
Fault Current Indicators (FCIs) with communication interfaces have been widely used in distribution systems to reduce fault-finding time. The effectiveness of a Fault Management System (FMS) composed of FCIs greatly depends on the performance of the ...
Jen-Hao Teng   +4 more
doaj   +1 more source

Does the Tax Cuts Policy Lower Firm Survival Risk? Evidence from China [PDF]

open access: yesE3S Web of Conferences, 2023
This paper examines the effect of tax cuts policy on firm survival risk. We analyze a panel data of China’s listed companies over the period 20082021 based on two different techniques: Kaplan-Meier survival estimator and the Cox proportional hazards ...
Wang Hong   +3 more
doaj   +1 more source

Local treatment failure after globe-conserving therapy for choroidal melanoma. [PDF]

open access: yes, 2013
Local treatment failure after globe-conserving therapy for choroidal melanoma is a surgical complication with significant morbidity to the vision and eye. Few reports in the literature have addressed this complication exclusively.
Chang, Melinda Y, McCannel, Tara A
core   +1 more source

An Efficient Implementation of Fixed Failure-Rate Ratio Test for GNSS Ambiguity Resolution

open access: yesSensors, 2016
Ambiguity Resolution (AR) plays a vital role in precise GNSS positioning. Correctly-fixed integer ambiguities can significantly improve the positioning solution, while incorrectly-fixed integer ambiguities can bring large positioning errors and ...
Yanqing Hou, Sandra Verhagen, Jie Wu
doaj   +1 more source

X-ray microtomographic characterization and quantification of the strain rate dependent failure mechanism in cenosphere epoxy syntactic foams [PDF]

open access: yes, 2016
This work investigates the failure mechanism in cenosphere epoxy syntactic foams at the quasi-static and dynamic strain rates. Split-Hopkinson pressure bar experiments are controlled to stop dynamic deformation of the foams at various strain stages.
Adrien   +26 more
core   +1 more source

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