Results 51 to 60 of about 282,915 (147)

Modelagem da estrutura de florestas clonais de Populus deltoides Marsh através de distribuições diamétricas probabilísticas

open access: yesCiência Florestal, 2004
In this paper, six Populus deltoides Marsh. clonal forests planted in 1986 were structurally evaluated between 1987 and 1995 (1 to 9 years old). Probabilistic functions normal, gamma, beta, Johnson SB and Weibull with two and three parameters were ...
Julio Eduardo Arce
doaj  

Adaptive fuzzy integrated LMS based control strategy for voltage power quality enhancement

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy
In this paper, an adaptive Takagi Sugeno (TS) Fuzzy integrated Mixed Order Normalized Least Mean Square/Fourth Algorithm (MONLMS/F) is proposed for the unresolved voltage power quality issues in distribution system. The proposed control utilizes the cost
Prashant Kumar   +2 more
doaj   +1 more source

Clutter attenuation‐stable normalised least‐mean fourth for PBR

open access: yesElectronics Letters, 2016
The stable normalised least‐mean fourth (SNLMF) algorithm is developed in the passive bistatic radar (PBR) system to realise the interference cancellation. The larger power of the reference signal may lead to the poor convergence rate.
Yuping Zhang   +3 more
doaj   +1 more source

On the Fourth Power Mean of a Sum Analogues to Character Sums Over Short Intervals

open access: yesBulletin of the Belgian Mathematical Society - Simon Stevin, 2011
The paper under review deals with the sum \(\sum_{1\leq n\leq N}(-1)^n\chi(n)\), where \(\chi\) denotes a Dirichlet character modulo \(q\geq 2\). The first theorem gives the following asymptotic formula \[ \sum_{\chi\bmod q}\Bigl|\sum_{n\leq N}(-1)^nn^k\chi(n)\Bigr|^4=\frac{80\ln N-50\ln 2}{(2k+1)^3n^2}\frac{\varphi^4(q)}{q^3}N^{4k+2}\prod_{p|q}\frac{p}
Tian, Qing, He, Yanfeng, Zhang, Wenpeng
openaire   +3 more sources

Influence of pupil dilation on predicted postoperative refraction and recommended IOL to obtain target postoperative refraction calculated by using third- and fourth-generation calculation formulas

open access: yesClinical Ophthalmology, 2018
Takeshi Teshigawara,1–3 Akira Meguro,3 Nobuhisa Mizuki3 1Yokosuka Chuoh Eye Clinic, Yokosuka, Kanagawa, Japan; 2Tsurumi Chuoh Eye Clinic, Yokohama, Kanagawa, Japan; 3Department of Ophthalmology, Yokohama City University School of Medicine ...
Teshigawara T, Meguro A, Mizuki N
doaj  

Editorial - International Journal of Sustainable Energy Planning and Management Vol 4

open access: yesInternational Journal of Sustainable Energy Planning and Management, 2014
This editorial introduces the fourth volume of the International Journal of Sustainable Energy Planning and Management. Topics include mean-variance approach of energy systems design, the role of heat savings in smart energy systems, analyses of the ...
Poul Alberg Østergaard
doaj   +1 more source

The impact of a random metric upon a diffusing particle

open access: yesScientific Reports
We show that if the singularity of the covariance of the random metric is $$\vert \textbf{x}\vert ^{-2\gamma }$$ | x | - 2 γ then the mean value of the fourth power of the distance achieved in time t by a diffusing particle behaves as $$t^{2(1-\gamma )}$$
Z. Haba
doaj   +1 more source

Signal-to-noise, spatial resolution and information capacity of coherent diffraction imaging

open access: yesIUCrJ, 2018
It is shown that the average signal-to-noise ratio (SNR) in the three-dimensional electron-density distribution of a sample reconstructed by coherent diffractive imaging cannot exceed twice the square root of the ratio of the mean total number of ...
Timur E. Gureyev   +5 more
doaj   +1 more source

An explicit formula for the fourth power mean of the Riemann zeta-function

open access: yesActa Mathematica, 1993
In this important paper the author establishes an explicit formula for \[ I(T,\Delta)= (\Delta\sqrt{\pi})^{-1} \int_{-\infty}^ \infty |\zeta ({\textstyle {1\over 2}}+iT+it)|^ 4 e^{-(t/\Delta)^ 2} dt \qquad ...
openaire   +2 more sources

Stochastic‐gradient‐based control algorithms for power quality enhancement in solar photovoltaic interfaced three‐phase distribution system

open access: yesIET Generation, Transmission & Distribution
Here, stochastic‐gradient‐based adaptive control algorithms have been discussed and employed for power quality enhancement in a Photovoltaics (PV) integrated distribution system.
Dinanath Prasad   +6 more
doaj   +1 more source

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