Results 21 to 30 of about 331,394 (276)

EVALUATIONS OF DIFFERENT MODELS FOR PREDICTING MERCHANTABLE VOLUME OF PINUS BRUTIA TEN. IN DUHOK GOVERNORATE

open access: yesScience Journal of University of Zakho, 2023
This study was initiated with the main objective of evaluating the prediction power of previously 24 published models in the literature, developed for estimating the merchantable volume of natural stands of Pinus brutia Ten.
Hanaa Naef Abdulqader   +1 more
doaj   +1 more source

Optimized Statistical Beamforming for Cooperative Spectrum Sensing in Cognitive Radio Networks

open access: yesMathematics, 2023
In cognitive radio (CR), cooperative spectrum sensing (CSS) employs a fusion of multiple decisions from various secondary user (SU) nodes at a central fusion center (FC) to detect spectral holes not utilized by the primary user (PU). The energy detector (
Ubaid M. Al-Saggaf   +3 more
doaj   +1 more source

Quadratic distances on probabilities: A unified foundation [PDF]

open access: yes, 2007
This work builds a unified framework for the study of quadratic form distance measures as they are used in assessing the goodness of fit of models.
Chen, Shu-Chuan   +4 more
core   +2 more sources

COMPARING GAUSSIAN KERNEL AND QUADRATIC SPLINE OF NONPARAMETRIC REGRESSION IN MODELING INFECTIOUS DISEASES

open access: yesBarekeng, 2023
The regression curve for nonparametric regression is assumed to belong to some infinite-dimensional collection of functions, which allows great flexibility in the form of the curve.
Amanda Adityaningrum   +6 more
doaj   +1 more source

Parameter Estimation and Hypothesis Testing of The Bivariate Polynomial Ordinal Logistic Regression Model

open access: yesMathematics, 2023
Logistic regression is one of statistical methods that used to analyze the correlation between categorical response variables and predictor variables which are categorical or continuous.
Marisa Rifada   +2 more
doaj   +1 more source

Evaluation of Formal posterior distributions via Markov chain arguments [PDF]

open access: yes, 2007
We consider evaluation of proper posterior distributions obtained from improper prior distributions. Our context is estimating a bounded function $\phi$ of a parameter when the loss is quadratic.
Eaton, Morris L.   +3 more
core   +5 more sources

Petrographic structures and Hardy – Weinberg equilibrium

open access: yesЗаписки Горного института, 2020
The article is devoted to the most narrative side of modern petrography – the definition, classification and nomenclature of petrographic structures. We suggest a mathematical formalism using the theory of quadratic forms (with a promising extension to ...
Yury L. VOYTEKHOVSKY, Alena A. ZAKHAROVA
doaj   +1 more source

Performance Analysis of Multi-Cell Association in Downlink MU-MIMO System with Arbitrary Beamforming

open access: yesMathematics, 2022
This article deals with the analysis of the multi-cell association setup, and it exploits the possibility of enhancing coverage in the envisioned sixth generation (6G) large-scale cellular networks.
Muhammad Moinuddin   +2 more
doaj   +1 more source

Stochastic Multipath Model for the In-Room Radio Channel based on Room Electromagnetics [PDF]

open access: yes, 2018
We propose a stochastic multipath model for the received signal for the case where the transmitter and receiver, both with directive antennas, are situated in the same rectangular room.
Pedersen, Troels
core   +2 more sources

Robust precoder design in MISO downlink based on quadratic channel estimation [PDF]

open access: yes, 2008
In [1], it has been proposed that channel estimates in quadratic form can be obtained at the base station by sending training sequences to the mobiles where the received signals are forwarded back to the base for channel estimation.
Ma, S, Ng, TS, Wong, KK, Zheng, G
core   +1 more source

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