An introduction to crystal analysis - download pdf or read online

By William Henry Bragg

This ebook is based on a process lectures which was once given on the college collage, Aberystwyth, within the autumn of 1926. The lectures have been meant for a basic viewers ; and consisted, consequently, of a chain of easy illustrations of the most good points of crvstal research. it'll no longer were attainable to do extra in the limits imposed by way of time and the conditions. The remedy during this ebook is a bit fuller and extra various than that of the lectures.

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6). The reasons for this difference are discussed in sect. 7. 1(b) shows the chain set for "IF x is a dog THEN x is an animal" or 'Every dog is an animal'. In the top part of a chain set 'I' denotes the affirmation of the item in the left margin (the 'element of the ground universe'); '0' denotes its negation. In 18 CHAPTER 1. , not including the end points 0 and 1). A chain set should be read one column or chain at a time. Fig. 2 depicts the M chain set for IF x is a dog THEN x is an animal AND IF x is a cat THEN x is an animal AND IF x is a dog THEN x is NOT a cat.

In (A) below, a knowledge based system is related to an expert system. 9. TERMINOLOGY* 29 natural language words and the relations between the meanings of different words. Definitions (CI)-(C6) at the end of this section are the ones which we use in this book. The 'Computer Dictionary' (A) [64] defines AI) A database: Loosely any aggregation of data; a file consisting of a number of records (or tables), each of which is constructed of fields (columns) of a particular type, together with a collection of operations that facilitate searching, sorting, recombination and similar activities.

Of (a) without the syntactic information of the bottom two lines of (a). Additional 'is a' information, such as 'no cat is a dog', can be stored in a prolonged version of (b) (see jig. 2). 'm' denotes a probability value in the open, real interval (0,1) (not including 0 and 1). The chain set table (b) should be read one column or 'chain' at a time. 1 and 0 entries indicate affirmation and negation respectively oj the 'ground universe' entry in the left margin. The chain represents the conjunction (AND composition) oj its elements.

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An introduction to crystal analysis by William Henry Bragg

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