By John Burdon Sanderson Haldane

Show description

Read or Download A Mathematical Theory of Natural and Artificial Selection PDF

Similar intelligence & semantics books

Classical and Evolutionary Algorithms in the Optimization fo Optical Systems

The optimization of optical platforms is a truly outdated challenge. once lens designers found the opportunity of designing optical structures, the need to enhance these structures by way of the technique of optimization all started. for a very long time the optimization of optical platforms used to be hooked up with recognized mathematical theories of optimization which gave strong effects, yet required lens designers to have a powerful wisdom approximately optimized optical structures.

Artificial neural networks and statistical pattern recognition : old and new connections

With the starting to be complexity of trend attractiveness comparable difficulties being solved utilizing man made Neural Networks, many ANN researchers are grappling with layout concerns equivalent to the dimensions of the community, the variety of education styles, and function review and limits. those researchers are regularly rediscovering that many studying approaches lack the scaling estate; the tactics easily fail, or yield unsatisfactory effects whilst utilized to difficulties of larger dimension.

Non-Standard Parameter Adaptation for Exploratory Data Analysis

Exploratory facts research, often referred to as info mining or wisdom discovery from databases, is sometimes in keeping with the optimisation of a selected functionality of a dataset. Such optimisation is frequently played with gradient descent or adaptations thereof. during this publication, we first lay the basis by means of reviewing a few regular clustering algorithms and projection algorithms prior to featuring a variety of non-standard standards for clustering.

Physical Computation and Cognitive Science

This booklet offers a examine of electronic computation in modern cognitive technology. electronic computation is a hugely ambiguous idea, as there is not any universal middle definition for it in cognitive technology. because this idea performs a imperative position in cognitive thought, an sufficient cognitive rationalization calls for an specific account of electronic computation.

Extra info for A Mathematical Theory of Natural and Artificial Selection

Example text

Crozier and Snyder. 1922. Proc. Soc. Exp. Biol. Med. 19, 327. Detlefsen. 1915. Genetics 3, 573. Durham. 19il. J. Genetics 1, 107. Goldschmidt. 1920. Z. indukt. -u. Verblehre 23, 1. Hardy. 1908. Science 28, 49. Heribert-Nilsson. 1920. Hereditas 1, 41. Ibsen and Steigleder. 1917. Am. Nat. 51,740. Jennings. 1915. Genetics 1, 53. Jones. 1920. Biol. Bull. 311,251. Morgan and Bridges. 1916. Carn. Inst. Wash. , 237. Pearl. 1907. Biometrika 5, 213. Pearl. 1912. Am Nat. 46, 130. Pearson. 1904. Phil. Trans.

Selection therefore proceeds much as according to equation 72 of Part I. (b) Stable equilibrium, 0 > 2K+ k', 2k + k' > 2K. 2K-2k-k' • • 3 niOS ^ {) n /ti»\ 2k-4>K} + l (2Eun+k'un-2K+ 2k+k'\ O0 0 g (2-2) ) where u0 5 ux according as un 5 vm. The results of Robertson (3) suggest that milk-yield in cattle depends on one or more sex-linked factors which act most effectively when heterozygous, besides autosomal factors. If so human effort in this case has given K a negative value, while k and k' are nearly zero.

A. FISHER. Proc. Roy. Soc. , vol. 42, p. 321, 1922. E. ROBERTSON. Journ. Genetics, vol. 11, p. 79, 1921. H. NILSSON-EHLE. Lund's Univ. , p. 69, 1909. E. R. SADNDERS. Journ. Genetics, vol. 10, p. 149, 1920. 6. GREGORY. Proc. Roy. Soc, B, vol. 87, p. 484, 1914. 7. BLAKESLEE, BELLING and FARNHAM. Science, vol. 52, p. 388, 1920'. Mr Haldane, A mathematical theory, etc. 607 A mathematical theory of Natural and Artificial Selection. Part IV. By Mr J. B. S. HALDANE, Trinity College. ith, and the resulting finite difference equation investigated.

Download PDF sample

Rated 4.71 of 5 – based on 49 votes