Difference engine | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Difference_engine


00:00:50 1 History
00:01:36 1.1 Charles Babbage's difference engines
00:04:58 1.2 Scheutzian calculation engine
00:06:26 1.3 Others
00:08:56 1.4 Construction of two working No. 2 difference engines
00:11:32 2 Operation
00:12:40 2.1 Timing
00:14:13 2.2 Steps
00:16:33 2.3 Subtraction
00:16:57 3 Method of differences
00:20:16 4 Initial values
00:24:02 4.1 Use of derivatives
00:25:55 4.2 Curve fitting
00:26:41 5 The difference engine in other works



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SUMMARY
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A difference engine, first created by Charles Babbage, is an automatic mechanical calculator designed to tabulate polynomial functions. Its name is derived from the method of divided differences, a way to interpolate or tabulate functions by using a small set of polynomial coefficients. Most mathematical functions commonly used by engineers, scientists and navigators, including logarithmic and trigonometric functions, can be approximated by polynomials, so a difference engine can compute many useful tables of numbers.
The historical difficulty in producing error-free tables by teams of mathematicians and human "computers" spurred Charles Babbage's desire to build a mechanism to automate the process.