نتایج جستجو برای: k nn
تعداد نتایج: 385892 فیلتر نتایج به سال:
background: epilepsy is a severe disorder of the central nervous system that predisposes the person to recurrent seizures. fifty million people worldwide suffer from epilepsy; after alzheimer's and stroke, it is the third widespread nervous disorder. objective: in this paper, an algorithm to detect the onset of epileptic seizures based on the analysis of brain electrical signals (eeg) has be...
Many pattern recognition tasks make use of the k nearest neighbour (k–NN) technique. In this paper we are interested on fast k– NN search algorithms that can work in any metric space i.e. they are not restricted to Euclidean–like distance functions. Only symmetric and triangle inequality properties are required for the distance. A large set of such fast k–NN search algorithms have been develope...
Predefined category exists for text categorization. In a document, text may be of any type category like government, education or health etc. many methods exist in market invented by researchers for text categorization. One of them is k-NN (k nearest neighbor) algorithm. k play a role to define number of classes for categorization. A training set is generated for each type of category to check ...
برای شبیهسازی سریهای زمانی، روشهیا مختلفی ارائه شدهاند که از آن جمله میتوان مدلهای سری زمانی AR، ARMA و ARMAX و روشهای رگرسیون چندخطی (MLR) و رگرسیون ناپارامتری (K-NN) را برشمرد. در این تحقیق، عملکرد این روشها در برآورد دادههای مفقود و پیشبینی مقادیر آتی سری زمانی تبخیر از سطح آزاد آب مورد بررسی قرار گرفت. مدل ARMAX با استفاده از ورودیهای استاندارد شدة دمای کمینه و بیشینه، متوسط دما،...
In this paper, we propose and describe efficient multiclass classification and recognition of unconstrained handwritten Arabic words using machine learning approaches which include the K-nearest neighbor (K-NN) clustering, and the neural network (NN). The technical details are presented in terms of three stages, namely preprocessing, feature extraction and classification. Firstly, words are seg...
Though the k-nearest neighbor (k-NN) pattern classifier is an effective learning algorithm, it can result in large model sizes. To compensate, a number of variant algorithms have been developed that condense the model size of the k-NN classifier at the expense of accuracy. To increase the accuracy of these condensed models, we present a direct boosting algorithm for the k-NN classifier that cre...
The architecture named the GALIS is a cluster-based distributed computing system architecture which has been devised to efficiently handle a large volume of LBS application data. In this paper, we propose a distributed kNN query processing scheme for moving objects on multiple computing nodes, each of which keeps records relevant to a different geographical zone. We also propose a hybrid k-NN s...
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