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In the $k$-nearest neighborhood model ($k$-NN), we are given a set of points $P$, and we shall answer queries $q$ by returning the $k$ nearest neighbors of $q$ in $P$ according to some metric. This concept is crucial in many areas of data…

机器学习 · 计算机科学 2018-12-03 Hendrik Fichtenberger , Dennis Rohde

The k-nearest neighbors (kNN) algorithm is a cornerstone of non-parametric classification in artificial intelligence, yet its deployment in large-scale applications is persistently constrained by the computational trade-off between…

机器学习 · 计算机科学 2026-01-26 Jiaye Li , Gang Chen , Hang Xu , Shichao Zhang

The $k$-nearest neighbor ($k$-NN) algorithm is one of the most popular methods for nonparametric classification. However, a relevant limitation concerns the definition of the number of neighbors $k$. This parameter exerts a direct impact on…

机器学习 · 计算机科学 2024-09-10 Alexandre Luís Magalhães Levada , Frank Nielsen , Michel Ferreira Cardia Haddad

KNN has the reputation to be the word simplest but efficient supervised learning algorithm used for either classification or regression. KNN prediction efficiency highly depends on the size of its training data but when this training data…

机器学习 · 计算机科学 2021-07-01 Jude Tchaye-Kondi , Yanlong Zhai , Liehuang Zhu

Nearest neighbour graphs are widely used to capture the geometry or topology of a dataset. One of the most common strategies to construct such a graph is based on selecting a fixed number k of nearest neighbours (kNN) for each point.…

机器学习 · 统计学 2022-08-02 Tetsuya Matsumoto , Stephen Zhang , Geoffrey Schiebinger

$K$-NN classifier is one of the most famous classification algorithms, whose performance is crucially dependent on the distance metric. When we consider the distance metric as a parameter of $K$-NN, learning an appropriate distance metric…

机器学习 · 计算机科学 2019-11-26 Kun Song

Interpretability techniques in NLP have mainly focused on understanding individual predictions using attention visualization or gradient-based saliency maps over tokens. We propose using k nearest neighbor (kNN) representations to identify…

计算与语言 · 计算机科学 2020-10-20 Nazneen Fatema Rajani , Ben Krause , Wengpeng Yin , Tong Niu , Richard Socher , Caiming Xiong

The traditional k nearest neighbor (kNN) approach uses a distance formula within a spherical region to determine the k closest training observations to a test sample point. However, this approach may not work well when test point is located…

机器学习 · 统计学 2024-02-19 Amjad Ali , Zardad Khan , Dost Muhammad Khan , Saeed Aldahmani

Probabilistic k-nearest neighbour (PKNN) classification has been introduced to improve the performance of original k-nearest neighbour (KNN) classification algorithm by explicitly modelling uncertainty in the classification of each feature…

机器学习 · 计算机科学 2013-05-07 Ji Won Yoon , Nial Friel

K-Nearest Neighbours (k-NN) is a popular classification and regression algorithm, yet one of its main limitations is the difficulty in choosing the number of neighbours. We present a Bayesian algorithm to compute the posterior probability…

机器学习 · 计算机科学 2017-06-05 Giuseppe Nuti

kNN is a very effective Instance based learning method, and it is easy to implement. Due to heterogeneous nature of data, noises from different possible sources are also widespread in nature especially in case of large-scale databases. For…

机器学习 · 计算机科学 2020-05-19 Joydip Dhar , Ashaya Shukla , Mukul Kumar , Prashant Gupta

K-nearest neighbors (KNN) is one of the earliest and most established algorithms in machine learning. For regression tasks, KNN averages the targets within a neighborhood which poses a number of challenges: the neighborhood definition is…

机器学习 · 计算机科学 2022-05-18 Youssef Nader , Leon Sixt , Tim Landgraf

Anomaly detection aims at identifying images that deviate significantly from the norm. We focus on algorithms that embed the normal training examples in space and when given a test image, detect anomalies based on the features distance to…

计算机视觉与模式识别 · 计算机科学 2023-05-30 Ori Nizan , Ayellet Tal

In recent years, many deep-learning based models are proposed for text classification. This kind of models well fits the training set from the statistical point of view. However, it lacks the capacity of utilizing instance-level information…

计算与语言 · 计算机科学 2017-08-29 Zhiguo Wang , Wael Hamza , Linfeng Song

K-nearest neighbors algorithm is one of the prominent techniques used in classification and regression. Despite its simplicity, the k-nearest neighbors has been successfully applied in time series forecasting. However, the selection of the…

统计方法学 · 统计学 2021-03-29 Samya Tajmouati , Bouazza El Wahbi , Adel Bedoui , Abdallah Abarda , Mohamed Dakkoun

Various kinds of k-nearest neighbor (KNN) based classification methods are the bases of many well-established and high-performance pattern-recognition techniques, but both of them are vulnerable to their parameter choice. Essentially, the…

人工智能 · 计算机科学 2016-12-08 Ji Feng , Qingsheng Zhu , Jinlong Huang , Lijun Yang

We present a fully convolutional neural network architecture that is capable of estimating full probability surfaces of potential passes in soccer, derived from high-frequency spatiotemporal data. The network receives layers of low-level…

机器学习 · 计算机科学 2021-08-05 Javier Fernández , Luke Bornn

Deep neural networks (DNNs) enable innovative applications of machine learning like image recognition, machine translation, or malware detection. However, deep learning is often criticized for its lack of robustness in adversarial settings…

机器学习 · 计算机科学 2018-03-14 Nicolas Papernot , Patrick McDaniel

The k Nearest Neighbors (kNN) method has received much attention in the past decades, where some theoretical bounds on its performance were identified and where practical optimizations were proposed for making it work fairly well in high…

机器学习 · 计算机科学 2016-06-14 Aleksander Lodwich , Faisal Shafait , Thomas Breuel

k Nearest Neighbor (kNN) method is a simple and popular statistical method for classification and regression. For both classification and regression problems, existing works have shown that, if the distribution of the feature vector has…

统计理论 · 数学 2019-10-24 Puning Zhao , Lifeng Lai
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