نتایج جستجو برای: covariance localization

تعداد نتایج: 166820  

Journal: :Neurocomputing 2006
X. Yu James J. Knierim I. Lee Harel Z. Shouval

Spatial firing fields (place fields) of rat hippocampal cells undergo changes when the rat runs stereotyped routes. Previously, Mehta et al. [Experience-dependent asymmetric shape of hippocampal receptive fields, Neuron 25 (2000) 700–715] indicated that spike timingdependent plasticity (STDP) might explain the observed shift of the place field center of mass and the development of skewness. In ...

1997
Fabien Claveau Michel Poirier Denis Gingras

The optical sensor is composed of two eyesafe parallel laser beams operating at two different wavelengths (see Figure 1). When a vehicle passes in front of the sensor, the laser light is diffused on the surface of the vehicle. The diffused light is then focused on two photodetectors, one for each laser. We thus obtain two signals, x(t) and yet), which represent the fluctuations in time of the i...

Journal: :journal of ai and data mining 2014
seyed mojtaba hosseinirad mehdi niazi j pourdeilami swapan kumar basu ali akbar pouyan

in wireless sensor networks (wsns), localization algorithms could be range-based or range-free. the approximate point in triangle (apit) is a range-free approach. we propose modification of the apit algorithm and refer as modified-apit. we select suitable triangles with appropriate distance between anchors to reduce pit test errors (edge effect and non-uniform placement of neighbours) in apit a...

Journal: :medical journal of islamic republic of iran 0
shirzad nasiri tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) ahmadreza soroush tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) amir pejman hashemi tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) anushiravan hedayat tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) kianoush donboli tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) farhad mehrkhani tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)

background: bilateral neck exploration is the gold standard for parathyroid adenoma localization in primary hyperparathyroidism. but surgeons do not have adequate experience for accurate surgical exploration and new methods are developed for surgery like unilateral exploration and minimally invasive surgery, thus, preoperative localization could reduces time and stress in surgical performance. ...

Journal: :Machine learning: science and technology 2022

Several techniques have been proposed over the years for automatic hypocenter localization. While those pros and cons that trade-off computational efficiency susceptibility of getting trapped in local minima, an alternate approach is needed allows robust localization performance holds potential to make elusive goal real-time microseismic monitoring possible. Physics-informed neural networks (PI...

Abolfazl Toroghi Haghighat, Fereydoon Abdi

Wireless sensor networks attracting a great deal of research interest. Accurate localization of sensor nodes is a strong requirement in a wide area of applications. In recent years, several techniques have been proposed for localization in wireless sensor networks. In this paper we present a localization scheme with using only one mobile anchor station and received signal strength indicator tec...

2002
Jacob A. Wegelin Thomas S. Richardson

We specify a class of Gaussian rank-r latent models for cross-covariance. We show by construction that any variance-covariance matrix for the observed variables induced by rank-r reduced-rank regression can be induced by a rank-r latent model. 1 Model specification Basic terms are introduced which will be used to state the result. 1.1 Rank-r constraint models Let p be the number of X-variables ...

Journal: :acta medica iranica 0
reza raoofian department of medical genetics, faculty of medicine, tehran university of medical sciences, tehran, iran. mohammad reza noori-daloii department of medical genetics, faculty of medicine, tehran university of medical sciences, tehran, iran. samira saee-rad department of medical genetics, faculty of medicine, tehran university of medical sciences, tehran, iran. mohammad hossein modarresi department of medical genetics, faculty of medicine, tehran university of medical sciences, tehran, iran. seyed hamid ghaffari hematology, oncology and bmt research center, shariati hospital, tehran university of medical sciences, tehran, iran. majid mojarrad department of medical genetics, school of medicine, mashhad university of medical sciences, mashhad, iran.

glioblastoma is the most common and the most lethal primary brain cancer. this malignancy is highly locally invasive, rarely metastatic and resistant to current therapies. little is known about the distinct molecular biology of glioblastoma multiforme (gbm) in terms of initiation and progression. so far, several molecular mechanisms have been suggested to implicate in gbm development. homeodoma...

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