Results 141 to 150 of about 6,268 (249)

Analyzing Documents with TF-IDF

The Programming Historian, 2019
This lesson focuses on a foundational natural language processing and information retrieval method called Term Frequency - Inverse Document Frequency (tf-idf).
Matthew J. Lavin
doaj  

Automating the Extraction of Words and Topics in Indonesian Using the Term Frequency-Inverse Document Frequency Algorithm and Latent Dirichlet Allocation

JISA (Jurnal Informatika dan Sains)
Keyword extraction and topic modeling in the analysis of Gojek user reviews in Indonesian are very important. By understanding user preferences and needs through keyword extraction, as well as grouping user reviews into different topics through topic ...
Lalu Mutawalli, Mohammad Taufan Asri Zaen, Muhammad Fauzi Zulkarnaen   +2 more
doaj   +1 more source

Correlated Charge Transport in an Organic Coulomb Glass

Advanced Materials, EarlyView.
ABSTRACT Advances in the development of organic field‐effect transistors (OFETs), electrically gated organic semiconductors (EGOFETs), and organic electrochemical transistors (OECTs) allow for the operation of these devices at very high charge‐carrier densities, where Coulomb interactions between carriers can be expected to become significant.
Magdalena Sophie Dörfler, Heinz Bässler, Harald Oberhofer, Anna Köhler   +3 more
wiley   +1 more source

Miniature Soft Robot With Magnetically Reprogrammable Surgical Functions

Advanced Materials, EarlyView.
Miniature soft robots have great prospects to revolutionize minimally invasive treatments. Here we present a miniature soft robot, which can be reprogrammed to perform five surgical functionalities with six‐degrees‐of‐freedom motions. This soft robot can prospectively make minimally invasive surgery considerably safer and painless, and enable ...
Chelsea Shan Xian Ng, Yu Xuan Yeoh, Nicholas Yong Wei Foo, Keerthana Radhakrishnan, Guo Zhan Lum   +4 more
wiley   +1 more source

Penerapan Term Frequency-Inverse Document Frequency dan Word Embedding untuk Penilaian Esai Otomatis

JURNAL ILMIAH INFORMATIKA
Penilaian esai secara manual di tingkat sekolah kejuruan merupakan proses yang memakan waktu dan subjektif. Penelitian ini mengimplementasikan dan mengevaluasi model penilaian esai otomatis menggunakan kombinasi algoritma Term Frequency-Inverse Document Frequency (TF-IDF) untuk penimbangan kata dan Word Embedding untuk analisis makna semantik.
Rangga Muhammad Firdaus, Andy Victor Pakpahan   +1 more
openaire   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Perancangan Informastion Retrieval (IR) Berbasis Term Frequency-Inverse Document Frequency (TF-IDF) untuk Peringkasan Teks Tugas Khusus Berbahasa Indonesia

, 2013
Tugas khusus merupakan salah satu prasyarat kelulusan di STMIK ASIA. Informasi yang terdapat pada laporan tugas khusus terbilang cukup banyak, pada laporan tugas akhir berkisar antara 50 hingga 100 halaman.
Wijaya, Erwien Tjipta
core  

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

A Simple Probabilistic Explanation of Term Frequency-Inverse Document Frequency (tf-idf) Heuristic (and Variations Motivated by This Explanation)

, 2014
In document analysis, an important task is to automatically nd keywords which best describe the subject of the document. One of the most widely used techniques for keyword detection is a technique based on the term frequency-inverse document fre-quency ...
Havrlant, Lukas, Lukás ̌ Havrlanta B, Vladik Kreinovichc, Kreinovich, Vladik   +3 more
core  

Lead Halide Perovskite Photoelectrocatalysis

Advanced Materials, EarlyView.
Lead halide perovskite semiconductors have emerged as highly promising materials for solar fuel and chemical synthesis. This perspective discusses advances made in the rational photoelectrode design to improve solar‐to‐chemical conversion, product scope, and scalability.
Virgil Andrei
wiley   +1 more source