Valence Meaning
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Formal Analysis for Natural Language Processing: A Handbook
The field of natural language processing (NLP) is one of the most important and useful application areas of artificial intelligence. NLP is now rapidly evolving, as new methods and toolsets converge with an ever-expanding wealth of available data. This state-of-the-art handbook addresses all aspects of formal analysis for natural language processing. Following a review of the field’s history, it systematically introduces readers to the rule-based model, statistical model, neural network model, and pre-training model in natural language processing. At a time characterized by the steady and vigorous growth of natural language processing, this handbook provides a highly accessible introduction and much-needed reference guide to both the theory and method of NLP. It can be used for individual study, as the textbook for courses on natural language processing or computational linguistics, or as a supplement to courses on artificial intelligence, and offers a valuable asset for researchers, practitioners, lecturers, graduate and undergraduate students alike.
A Study of Valence with Reference to Secondary School Chemistry
"The purpose of this study is to investigate the place of valence as a topic in high school chemistry with a view to finding possible means of closing the gap between what is actually achieved at the secondary level, and what seems to be a desirable point as which to initiate college study. Some of the factors responsible for this might well be the confusion in terminology, the lag between the enunciation of theories and their appearance in text-books, the difficulty of symbolic representation of atomic and molecular structure, and the 'closed' mind many students develop toward change. The extent to which these difficulties can be resolved in the light of research studies, historical development of the theory, future work to be encountered, and the level of maturity of the high school pupil will be considered ... Historical works, surveys of educational research, scientific and educational journals, text-books, courses of studies, and works on methodology have been consulted."--The Introduction and Statement of the Problem, l.2-3