✦ LIBER ✦

Error detection, error correction and performance evaluation in on-line mathematical expression recognition

✍ Scribed by Kam-Fai Chan; Dit-Yan Yeung

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 216 KB
Volume: 34
Category: Article
ISSN: 0031-3203
DOI: 10.1016/s0031-3203(00)00102-3

No coin nor oath required. For personal study only.

✦ Synopsis

Automatic recognition of on-line mathematical expressions is di$cult especially when there exist errors. In this paper, we incorporate an error detection and correction mechanism into a parser developed previously by us based on de"nite clause grammar (DCG). The resulting system can handle lexical, syntactic and some semantic errors. The recognition speed for 600 commonly seen expressions is quite acceptable, ranging from 0.73 to 6 s per expression on a modest workstation. In addition, we propose a performance evaluation scheme which can be used to demonstrate the e!ectiveness of both the symbol recognition and structural analysis stages by a single measure.

📜 SIMILAR VOLUMES

On-line state recognition in a yeast fed

On-line state recognition in a yeast fed-batch culture using error vectors

✍ Hiroshi Shimizu; Keigo Miura; Suteaki Shioya; Ken-ichi Suga 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 770 KB

Assessment of errors in the determinatio

Assessment of errors in the determination of Mark–Houwink–Sakurada and Stockmayer–Fixman constants using size-exclusion chromatography with on-line viscometric detection: Analyses of poly(p-substituted styrenes) in tetrahydrofuran

✍ Michelle L. Coote; Thomas P. Davis 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 198 KB 👁 2 views

In this work, we present values for the Mark-Houwink-Sakurada (MHS) and Stockmayer-Fixman (SF) constants for a series of homopolymers of para-substituted styrenes (4-X-styrene; X ϭ OCH 3 , OCH 2 CH 3 , CH 3 , F, Cl, and Br) in THF at room temperature. The respective values of K (in 10 Ϫ5 dL/g) and ␣

On-Line Recognition and Quantitation of

On-Line Recognition and Quantitation of Coeluting Hypoxanthine and Guanine in Reversed-Phase High-Performance Liquid Chromatography of Placental Tissue Extracts: Photodiode-Array Detection and Spectral Analysis of Coeluting Peaks

✍ I. Szabo; M.H. Maguire 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 655 KB

In a reversed-phase HPLC method, optimized for resolution and quantitation of nucleosides and nucleobases in human term placental extracts, guanine coeluted with hypoxanthine. Three numerical techniques that treat spectral data generated by photodiode-array detection to yield indices of peak purity