نتایج جستجو برای: الگوریتم learning from examples (lfe)

تعداد نتایج: 6081419  

ژورنال: :مجله دانشکده پزشکی اصفهان 0
منیره خیام نیا دانشجوی دکتری ریاضی کاربردی، دانشکده ی ریاضی، دانشگاه پیام نور، تهران، ایران محمدرضا یزدچی دانشیار، گروه مهندسی پزشکی، دانشکده ی فنی و مهندسی، دانشگاه اصفهان، اصفهان، ایران محسن فروغی پور دانشیار، گروه مغز و اعصاب، دانشکده ی پزشکی، دانشگاه علوم پزشکی مشهد، مشهد، ایران

مقدمه: سردرد میگرنی یکی از انواع سردردها به شمار می رود که از شیوع به نسبت بالایی برخوردار است. اولین قدم برای شروع فرایند درمان، تشخیص آن می باشد. از آن جایی که منطق فازی توانایی بسیار بالایی در توصیف مفاهیم غیر دقیق و مبهم دارد، از این ابزار جهت مدل سازی استفاده می شود. هدف از انجام پژوهش حاضر، تشخیص سردرد میگرنی با استفاده از منطق و سیستم های فازی بود. روش ها: با استفاده از منطق فازی و الگور...

2013
Simen Gaure SIMEN GAURE

If you use lfe for various tasks, you will notice that some estimations converge fast, whereas others converge slowly. Convergence rate of the methods used by lfe is not a walk in the park. Here are some examples.

Journal: :Statistical Analysis and Data Mining 2009
Yijun Sun Dapeng Wu

RELIEF is considered one of the most successful algorithms for assessing the quality of features. It has been recently proven that RELIEF is an online learning algorithm that solves a convex optimization problem with a margin-based objective function. Starting from this mathematical interpretation, we propose a novel feature extraction algorithm, referred to as LFE, as a natural generalization ...

2017
Fatemeh Nargesian Horst Samulowitz Udayan Khurana Elias Boutros Khalil Deepak S. Turaga

Feature engineering is the task of improving predictive modelling performance on a dataset by transforming its feature space. Existing approaches to automate this process rely on either transformed feature space exploration through evaluation-guided search, or explicit expansion of datasets with all transformed features followed by feature selection. Such approaches incur high computational cos...

2016
Yuwang Lai De-feng Gu Junhong Liu Wenping Li Dongyun Yi

The low frequency errors (LFE) of star trackers are the most penalizing errors for high-accuracy satellite attitude determination. Two test star trackers- have been mounted on the Space Technology Experiment and Climate Exploration (STECE) satellite, a small satellite mission developed by China. To extract and compensate the LFE of the attitude measurements for the two test star trackers, a new...

2008
Yijun Sun Dapeng Wu

RELIEF is considered one of the most successful algorithms for assessing the quality of features due to its simplicity and effectiveness. It has been recently proved that RELIEF is an online algorithm that solves a convex optimization problem with a marginbased objective function. Starting from this mathematical interpretation, we propose a novel feature extraction algorithm, referred to as LFE...

Journal: :Inorganic chemistry 2009
Martin G O'Toole Brian Bennett Mark S Mashuta Craig A Grapperhaus

The five-coordinate iron-dithiolate complex (N,N'-4,7-bis-(2'-methyl-2'-mercatopropyl)-1-thia-4,7-diazacyclononane)iron(III), [LFe]+, has been isolated as the triflate salt from reaction of the previously reported LFeCl with thallium triflate. Spectroscopic characterization confirms an S = 1/2 ground state in non-coordinating solvents with room temperature microeff = 1.78 microB and electron pa...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم انسانی 1393

this thesis aims at putting together two of the vestest areas of study there is in humanities: bioethics and literature. the two novels in question, oryx and crake and the year of the flood, are considered as some of the most succssful examples of spculative fiction. in these novels the biological and environmental issues raised as looked at from a bioethics point of view.

2015
M. G. Bostock A. M. Thomas G. Savard L. Chuang A. M. Rubin

We employ 130 low-frequency earthquake (LFE) templates representing tremor sources on the plate boundary below southern Vancouver Island to examine LFE magnitudes. Each template is assembled from hundreds to thousands of individual LFEs, representing over 269,000 independent detections from major episodic-tremor-and-slip (ETS) events between 2003 and 2013. Template displacement waveforms for di...

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