نتایج جستجو برای: vector quantisation

تعداد نتایج: 198078  

Journal: :International journal of data mining and bioinformatics 2010
Mingzhou Song Robert M. Haralick Stéphane Boissinot

An efficient and exact dynamic programming algorithm is introduced to quantise a continuous random variable into a discrete random variable that maximises the likelihood of the quantised probability distribution for the original continuous random variable. Quantisation is often useful before statistical analysis and modelling of large discrete network models from observations of multiple contin...

2004
S. Benedetto G. Montorsi

where p is an empirically chosen constant (0 < 1-1 < 2). The modification in the MBTS algorithm is in the last step where the quantisation levels are calculated. In the BTS algorithm the quantisation levels are selected at cluster centres. In MBTS, they are displaced from the cluster centres to facilitate the representation of more colours within a cluster with closer quantisation colours (eqn....

1999
Paul T. Troughton Simon J. Godsill

In digital systems, the amplitude of a time series is quantised with finite resolution. This is a nonlinear process which introduces distortion. We develop a Bayesian, model-based approach to reducing the quantisation distortion when moving a time series, such as an audio signal, to a higher resolution medium. The signal is modelled as a discrete-time, continuous-valued autoregressive (AR) proc...

Journal: :Compositionality 2023

We develop a categorical compositional distributional semantics for Lambek Calculus with Relevant Modality !L*, which has limited edition of the contraction and permutation rules. The part is monoidal biclosed category coalgebra modality, very similar to structure Differential Category. instantiate this finite dimensional vector spaces linear maps via "quantisation" functors work three concrete...

2002
C. Dunn

Sigma-delta modulation, where a single-bit quantiser is embedded within a negative feedback loop (Fig. 1), is now a commonly-used technique for implementing high-resolution analogue-to-digital and digital-toanalogue converters (DACs), principally because of a favourable insensitivity to component tolerancing [1]. Single-bit quantisation generates relatively high levels of quantisation noise, he...

Journal: :Journal of Physics A: Mathematical and General 1977

Journal: :Global Journal of Pure and Applied Sciences 2002

2000
Sylvia C. Wong George G. Coghill Bruce A. MacDonald

Two types of neural networks were trained and tested on a real robot for a natural landmark recognition task. The neural networks investigated were the multilayer perceptron (MLP) and learning vector quantisation (LVQ). The intended application is for autonomous vacuuming robots in completely unknown indoor environments, using a novel topological world model and region filling algorithm. A topo...

Journal: :Neural Computation 1993
Thorsteinn S. Rögnvaldsson

The discrimination powers of Multilayer perceptron (MLP) and Learning Vector Quantisation (LVQ) networks are compared for overlapping Gaussian distributions. It is shown, both analytically and with Monte Carlo studies, that the MLP network handles high dimensional problems in a more eecient way than LVQ. This is mainly due to the sigmoidal form of the MLP transfer function, but also to the the ...

Journal: :Geometry & Topology 2022

We investigate quantisations of line bundles $\mathcal{L}$ on derived Lagrangians $X$ over $0$-shifted symplectic Artin $N$-stacks $Y$. In our setting, a deformation quantisation consists curved $A_{\infty}$ the structure sheaf $\mathcal{O}_{Y}$, equipped with morphism to ring differential operators $\mathcal{L}$; for smooth Lagrangian subvarieties algebraic varieties, this simplifies deforming...

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