Results 21 to 30 of about 132,485,236 (247)

K-Nearest Neighbor Berbasis Particle Swarm Optimization untuk Analisis Sentimen Terhadap Tokopedia

JuTISI (Jurnal Teknik Informatika dan Sistem Informasi), 2020
Tokopedia is a popular marketplace used by e-commerce in Indonesia. Customers’ perception of Twitter towards Tokopedia can be used as an important source of information and can be processed into useful insights.
Dicki Pajri, Yuyun Umaidah, Tesa Nur Padilah   +2 more
doaj   +1 more source

Feature Selection and Weighting by Nearest Neighbor Ensembles [PDF]

, 2008
In the field of statistical discrimination nearest neighbor methods are a well known, quite simple but successful nonparametric classification tool. In higher dimensions, however, predictive power normally deteriorates. In general, if some covariates are
Gertheiss, Jan, Gerhard Tutz, Jan Gertheiss, Tutz, Gerhard   +3 more
core   +1 more source

Multispectral Palmprint Recognition Using a Quaternion Matrix

Sensors, 2012
Palmprints have been widely studied for biometric recognition for many years. Traditionally, a white light source is used for illumination. Recently, multispectral imaging has drawn attention because of its high recognition accuracy.
Yafeng Li, Changjiang Song, Xingpeng Xu, Zhenhua Guo   +3 more
doaj   +1 more source

DTFLOW: Inference and Visualization of Single-cell Pseudotime Trajectory Using Diffusion Propagation

Genomics, Proteomics & Bioinformatics, 2021
One of the major challenges in single-cell data analysis is the determination of cellular developmental trajectories using single-cell data. Although substantial studies have been conducted in recent years, more effective methods are still strongly ...
Jiangyong Wei, Tianshou Zhou, Xinan Zhang, Tianhai Tian   +3 more
doaj   +1 more source

GNMFLMI: Graph Regularized Nonnegative Matrix Factorization for Predicting LncRNA-MiRNA Interactions

IEEE Access, 2020
Long non-coding RNAs (lncRNAs) and microRNAs (miRNAs) have been involved in various biological processes. Emerging evidence suggests that the interactions between lncRNAs and miRNAs play an important role in the regulation of genes and the development of
Mei-Neng Wang, Zhu-Hong You, Li-Ping Li, Leon Wong, Zhan-Heng Chen, Cheng-Zhi Gan   +5 more
doaj   +1 more source

Weighted k-Nearest-Neighbor Techniques and Ordinal Classification [PDF]

, 2004
In the field of statistical discrimination k-nearest neighbor classification is a well-known, easy and successful method. In this paper we present an extended version of this technique, where the distances of the nearest neighbors can be taken into ...
Schliep, Klaus, Schliep, K., Hechenbichler, Klaus, Hechenbichler, K.   +3 more
core   +1 more source

A semismooth newton method for the nearest Euclidean distance matrix problem

, 2013
The Nearest Euclidean distance matrix problem (NEDM) is a fundamentalcomputational problem in applications such asmultidimensional scaling and molecularconformation from nuclear magnetic resonance data in computational chemistry.Especially in the latter ...
Qi, Houduo
core   +1 more source

Continuous Nearest Neighbor Queries over Sliding Windows [PDF]

, 2007
—This paper studies continuous monitoring of nearest neighbor (NN) queries over sliding window streams. According to this model, data points continuously stream in the system, and they are considered valid only while they belong to a sliding window that ...
Papadias, Dimitris, Dimitris Papadias, Kyriakos Mouratidis, MOURATIDIS, Kyriakos   +3 more
core   +1 more source

Improving imputation of missing PM_2.5 speciation data using PMF-informed source-receptor relationships [PDF]

Atmospheric Measurement Techniques
Missing values are ubiquitous in atmospheric monitoring due to instrument drift, calibration cycles, operational interruptions, and other random malfunctions. Such gaps can undermine the reliability of subsequent analyses and introduce systematic biases.
W. Zhu, M. Xie, Q. Dai, Q. Dai, X. Bi, Y. Zhang, Y. Feng   +6 more
doaj   +1 more source

Sugar-Free Milk Chocolate as a Carrier of Omega-3 Polyunsaturated Fatty Acids and Probiotics: A Potential Functional Food for the Diabetic Population

Foods, 2021
Chocolate is an adequate matrix to deliver bioactive ingredients. However, it contains high sugar levels, one of the leading causes of chronic degenerative diseases. This work aimed to evaluate the effects of milk chocolate reformulation with alternative
Andrea R. Gómez-Fernández, Paulinna Faccinetto-Beltrán, Norma E. Orozco-Sánchez, Esther Pérez-Carrillo, Luis Martín Marín-Obispo, Carmen Hernández-Brenes, Arlette Santacruz, Daniel A. Jacobo-Velázquez   +7 more
doaj   +1 more source