Results 81 to 90 of about 16,714,023 (180)

Some Properties of Gamma Generated Distributions

Statistica, 2015
Based on standard probability distributions, new families of univariate distributions have been introduced and their properties studied by many authors.
Manisha Pal, Montip Tiensuwan
doaj   +1 more source

Completely monotone regression estimates of software failure rates [PDF]

A method for estimating the present failure rate of a program is presented. A crude nonparameter estimate of the failure rate function is obtained from past failure times.
Miller, D. R., Sofer, A.
core   +1 more source

Photovoltaic Power Plants (PV-PP) Reliability Indicators for Improving Operation and Maintenance Activities. A Case Study of PV-PP Agigea Located in Romania

IEEE Access, 2019
The main purpose of this paper is to design a scientific-based probabilistic model based on Markov chains, to calculate reliability indicators, such as mean time between failure (MTBF) and mean time to failure (MTTF) based on probabilities, to compute ...
Simona-Vasilica Oprea, Adela Bara, Dan Preotescu, Luminita Elefterescu   +3 more
doaj   +1 more source

Exchange-rate volatility, exchange-rate disconnect, and the failure of volatility conservation [PDF]

Empirical analysis of exchange rates has produced puzzles that conventional models of exchange rates cannot explain. Here we deal with four puzzles regarding both real and nominal exchange rates, which are robust and inconsistent with standard theory ...
Alexei Deviatov, Igor Dodonov
core  

Prediction of gas leakage of environmental control systems [PDF]

, 1970
Mathematical models of leakage configurations and various flow theories are presented with the substantive experimental test data to provide background material for future design and failure analysis.
Jackson, J. K., Thomas, E. C.
core   +1 more source

Evaluation of Atmospheric Neutron Failure Rates and Damage Mechanisms of Ultra-high Voltage Thyristor for DC Transmission

Yuanzineng kexue jishu
As the core of high-voltage direct-current transmission technology, the DC converter valve and its key power device thyristor face a high risk of failure caused by atmospheric neutron when operating in high-altitude areas. The atmospheric neutron failure
PENG Chao1, ZHOU Yang2, CHEN Zhongyuan2, LEI Zhifeng1, MA Teng1, ZHANG Zhangang1, ZHANG Hong1, HE Yujuan1
doaj   +1 more source

To Burn-In, or Not to Burn-In: That’s the Question

Aerospace, 2019
In this paper it is shown that the bathtub-curve (BTC) based time-derivative of the failure rate at the initial moment of time can be considered as a suitable criterion of whether burn-in testing (BIT) should or does not have to be conducted.
Ephraim Suhir
doaj   +1 more source

Loading rate sensitivity of open hole composites in compression [PDF]

The results are reported of an experimental study on the compressive, time-dependent behavior of graphite fiber reinforced polymer composite laminates with open holes.
Elber, Wolf, Guynn, E. G., Lubowinski, Steve J., Whitcomb, J. D.   +3 more
core   +1 more source

Fracture size effects in nanoscale materials: the case of graphene

, 2015
Nanoscale materials display enhanced strength and toughness but also larger fluctuations and more pronounced size effects with respect to their macroscopic counterparts.
Sellerio, Alessandro Luigi, Taloni, Alessandro, Zapperi, Stefano   +2 more
core   +1 more source

Optimal management of vegetation maintenance and the associated costs of its implementation in overhead power distribution systems

TecnoLógicas, 2019
Network operators work constantly to maintain an appropriate level of reliability in their power supply and to preserve the integrity of the vegetation growing underneath overhead power distribution systems.
Johan S. Correa-Tamayo, Andrés Arias Londoño, Mauricio Granada-Echeverri   +2 more
doaj   +1 more source