• Thumbnail for Theta model
    The theta model, or Ermentrout–Kopell canonical model, is a biological neuron model originally developed to mathematically describe neurons in the animal...
    36 KB (5,025 words) - 06:28, 12 January 2025
  • t {\displaystyle \gamma -\mathrm {Re} _{\theta _{t}}} ) transition model was to develop a transition model based on local variables which could be easily...
    4 KB (559 words) - 09:44, 2 April 2025
  • prediction model ϵ θ ( x t , t ) {\displaystyle \epsilon _{\theta }(x_{t},t)} , one trains ϵ θ ( x t , σ t ) {\displaystyle \epsilon _{\theta }(x_{t},\sigma...
    84 KB (14,123 words) - 01:54, 6 June 2025
  • dispersion model of distributions and includes those families of probability distributions, parameterized by θ {\displaystyle {\boldsymbol {\theta }}} and...
    31 KB (4,231 words) - 04:22, 20 April 2025
  • Thumbnail for Biological neuron model
    theta model is d θ ( t ) d t = ( I − I 0 ) [ 1 + cos ⁡ ( θ ) ] + [ 1 − cos ⁡ ( θ ) ] {\displaystyle {\frac {d\theta (t)}{dt}}=(I-I_{0})[1+\cos(\theta...
    115 KB (14,910 words) - 17:56, 22 May 2025
  • Thumbnail for Hyundai Theta engine
    The Hyundai Theta is a gasoline four-cylinder automobile engine family. The third all-aluminum engine of Hyundai Motor Company debuted in the fourth-generation...
    21 KB (2,731 words) - 15:42, 24 April 2025
  • F θ : θ ∈ Θ } {\displaystyle {\mathcal {Q}}=\{F_{\theta }:\theta \in \Theta \}} is the set of models considered for inference. The second set P = { F λ...
    17 KB (2,261 words) - 08:13, 11 February 2025
  • {\theta |x}})} is also a Gaussian mixture model of the form p ( θ | x ) = ∑ i = 1 K ϕ ~ i N ( μ ~ i , Σ ~ i ) {\displaystyle p({\boldsymbol {\theta |x}})=\sum...
    57 KB (7,792 words) - 03:39, 19 April 2025
  • is the following: θ {\displaystyle \theta } has t (time) dependence — the Hull–White model. θ {\displaystyle \theta } and α {\displaystyle \alpha } are...
    15 KB (2,388 words) - 21:58, 24 May 2025
  • where the θ 1 , . . . , θ q {\displaystyle \theta _{1},...,\theta _{q}} are the parameters of the model, μ {\displaystyle \mu } is the expectation of...
    19 KB (2,461 words) - 18:47, 14 April 2025
  • X_{j})}}={\frac {\lambda _{0}(Y_{i})\theta _{i}}{\sum _{j=i}^{N}\lambda _{0}(Y_{i})\theta _{j}}}={\frac {\theta _{i}}{\sum _{j=i}^{N}\theta _{j}}},} where θj = exp(Xj...
    35 KB (5,760 words) - 13:31, 2 January 2025
  • θ λ 0 ( θ t ) {\displaystyle \lambda (t|\theta )=\theta \lambda _{0}(\theta t)} where θ {\displaystyle \theta } denotes the joint effect of covariates...
    11 KB (1,473 words) - 03:37, 27 January 2025
  • \partial _{\theta }\log \left(P_{\theta }(x)\right)=\mathbb {E} _{x'\sim P_{\theta }}[\partial _{\theta }E_{\theta }(x')]-\partial _{\theta }E_{\theta }(x)\...
    16 KB (2,189 words) - 14:05, 1 February 2025
  • {\displaystyle \{P_{\theta }:\theta \in \Theta \}} indexed by a parameter θ {\displaystyle \theta } . A parametric model is a model in which the indexing...
    5 KB (636 words) - 10:17, 17 June 2021
  • _{-\pi }^{\pi }d\theta _{1}\cdots d\theta _{L}\;e^{\beta J\cos(\theta _{1}-\theta _{2})}\cdots e^{\beta J\cos(\theta _{L-1}-\theta _{L})}\\&=2\pi \prod...
    31 KB (4,861 words) - 22:58, 14 January 2025
  • \theta _{j}} , given the occurrence of event y, we must begin with a model providing a joint probability distribution for θ j {\displaystyle \theta _{j}}...
    21 KB (3,603 words) - 14:51, 16 April 2025
  • function p ( x ∣ θ ) {\displaystyle p(x\mid \theta )} , the posterior distribution p ( θ ∣ x ) {\displaystyle p(\theta \mid x)} is in the same probability distribution...
    33 KB (2,246 words) - 18:05, 28 April 2025
  • model of order q: X t = μ + ε t + θ 1 ε t − 1 + ⋯ + θ q ε t − q = μ + ∑ i = 1 q θ i ε t − i + ε t , {\displaystyle X_{t}=\mu +\varepsilon _{t}+\theta...
    8 KB (1,079 words) - 03:07, 26 May 2025
  • the model has the following governing equations: d θ i d t = ω i + 1 N ∑ j = 1 N K i j sin ⁡ ( θ j − θ i ) , i = 1 … N {\displaystyle {\frac {d\theta _{i}}{dt}}=\omega...
    29 KB (3,997 words) - 20:02, 25 May 2025
  • Thumbnail for Langmuir adsorption model
    {\displaystyle S_{\text{conf}}/k_{\rm {B}}\approx -\theta _{A}\ln(\theta _{A})-(1-\theta _{A})\ln(1-\theta _{A}).} On the other hand, the entropy of a molecule...
    30 KB (4,987 words) - 16:30, 21 April 2025
  • ;\theta )=\prod _{k=1}^{n}\,f_{k}^{\mathsf {univar}}(x_{k};\theta )~.} The goal of maximum likelihood estimation is to find the values of the model parameters...
    68 KB (9,706 words) - 19:59, 16 June 2025
  • Theta (UK: /ˈθiːtə/ , US: /ˈθeɪtə/) uppercase Θ or ϴ; lowercase θ or ϑ; Ancient Greek: θῆτα thē̂ta [tʰɛ̂ːta]; Modern: θήτα thī́ta [ˈθita]) is the eighth...
    17 KB (2,014 words) - 23:17, 12 May 2025
  • Thumbnail for FitzHugh–Nagumo model
    Autowave Biological neuron model Computational neuroscience Hodgkin–Huxley model Morris–Lecar model Reaction–diffusion Theta model Chialvo map Sherwood, William...
    10 KB (1,420 words) - 23:09, 25 May 2025
  • Thumbnail for Hodgkin–Huxley model
    equation Goldman equation Memristor Neural accommodation Reaction–diffusion Theta model Rulkov map Chialvo map Hodgkin AL, Huxley AF (August 1952). "A quantitative...
    21 KB (3,048 words) - 16:14, 4 February 2025
  • _{i}} are the parameters of the autoregressive part of the model, the θ i {\displaystyle \theta _{i}} are the parameters of the moving average part and the...
    24 KB (3,362 words) - 00:07, 20 April 2025
  • {\displaystyle \{p_{\theta }\}_{\theta \in \Theta }} of distributions, then solve for min θ L ( p θ , p ∗ ) {\displaystyle \min _{\theta }L(p_{\theta },p^{*})} for...
    18 KB (3,926 words) - 13:42, 12 May 2025
  • u_{1},\dots ,u_{d}\ ;\ \theta \ )=\psi ^{-1}\!{\bigl (}\ \psi (u_{1};\theta )\ +\ \cdots \ +\ \psi (u_{d};\theta )\ ;\ \theta \ {\bigr )}} where   ψ :...
    75 KB (9,347 words) - 09:59, 15 June 2025
  • Thumbnail for Gamma distribution
    f(x;\alpha ,\theta )={\frac {x^{\alpha -1}e^{-x/\theta }}{\theta ^{\alpha }\Gamma (\alpha )}}\quad {\text{ for }}x>0{\text{ and }}\alpha ,\theta >0.} Here...
    66 KB (9,100 words) - 05:31, 2 June 2025
  • Thumbnail for Short-rate model
    Rendleman–Bartter model (1980) or Dothan model (1978) explains the short rate as d r t = θ r t d t + σ r t d W t {\displaystyle dr_{t}=\theta r_{t}\,dt+\sigma...
    27 KB (3,723 words) - 14:21, 24 May 2025
  • p(\theta ,\varphi \mid x)\propto p(x\mid \theta )p(\theta \mid \varphi )p(\varphi ).} This is the simplest example of a hierarchical Bayes model. The...
    53 KB (6,630 words) - 21:10, 4 April 2025