douglas hofstadter

The Douglas-purk algorithm is used to compress a large number of redundant graphic data points to extract necessary data points.The algorithm implements the following extraction process:1) connect a straight line to the first and last points of the curve, calculate the distance between all points on the curve and the straight line, and find the maximum distance value dmax. Use dmax to compare it with the preset threshold D:2) If dmax If dmax is greate

Http://www.cnblogs.com/xdlwd086/p/5100425.htmlThe seniors made up the Java version, so in reference to the idea of seniors, based on the implementation of C + + to share.#include 　　C + + implementation of the Douglas-peucker algorithm for trajectory compression

inheritedcustomize his own object.6.JS type inside (except for object)number (numeric type, no int, long Double,etc) Boolean string array date RegExp function7. Clear the difference between = = and = = =, recommend = = =8.NaN• Not a number• Operating results for undefined or erroneousnan equals nothingNan = = = Nan is False nan!== Nan is True9.Arraysarray inherits from Object. indexes is converted to strings and used as names for retrieving values. very efficient for Sparse arrays. not very eff

Douglas-Poke (Douglas one peukcer) algorithmCategory: Map | | Geo Data 2012-05-10 21:55 1431 people read comments (0) Collection report algorithm Douglas-Peukcer algorithm is proposed by D.douglas and T.peueker in 1973, and is called D-P algorithm, which is recognized as a classical algorithm of linear element simplification. Quite a few of the existing algorithm

Since I have time today, I will write a few more blog posts, but also for tomorrow to go out to play a good relaxing. As the comrades in the field of GIs know, the traditional Douglas-poke algorithms are recursive implementations. However, sometimes the recursive hierarchy is too deep, there will be stack overflow situation. In this paper, a non recursive algorithm is introduced. To change the recursive algorithm to a non recursive algorithm, it is ge

Douglas coordinate Extraction Algorithm Without $ polyline116.621222, 41.028553; 116.621648, 41.029848 ;.....; $ plsplit (;, $ polyline); $ plstr; $ flag0; $ min0.0001; for ($ j0; $ jcount ($ pl)-1; $ j + 3) {$ xy1split (, $ pl [$ j]); $ x1 $ xy1 [0]; $ y1 $ xy1 Douglas coordinate Extraction Algorithm Without $ polyline = "116.621222, 41.028553; 116.621648, 41.029848 ;..... "; $ pl = split ("; ", $ polyline

Douglas-Puke ExtractionAlgorithmIs used to compress a large number of redundant graphic data points to extract the necessary data points. The algorithm is used to strip the first and last points of a curve to a straight line, and calculate the distance between the other points and the straight line. The algorithm is compared with the specified critical value, if the value is less than the critical value, all the points at both ends of the line will be

Portal video address: http://video.yahoo.com/watch/111593/1710507 PPT: http://yuiblog.com/assets/crockford/javascript.zip   Suitable for anyone who has written javascript programs but is confused   I believe that every time I read it, I will have a

In JavaScript advancedProgramBoth Design (version 2nd) and JavaScript language ExtractCode: Object. beget = function (o) {function f () {}; F. Prototype = O; return new F ;}; A temporary constructor is defined in the function. The parameter O of

The Source code is as follows: Package Com.zznode.tnms.douglas; Import java.awt.*; Import Java.util.Random; Import Javax.swing.JFrame; /** * @author Weih * @date Oct/public class Polycompress extends JFrame {private static final int number = 50 ;/

The documentary "Shoro's Dream" (Jiro Dreams's sushi,2011) had a very bull scene----The world's most famous sushi chef turned to his son (going to open his own restaurant) and said, "You're homeless." In the face of this, when you think about it, you will find that the father's words are not too harsh or frustrating, in fact, this is the best way for a person who is going to start a new journey. Last October I quit my job and became a freelance writer. Writing only earned 900 dollars, but my la

personal contact with modern North America.(Note: The introduction of this book Sucks, the level is limited, forgive)Motorcycle Maintenance Arts (Zen and the Art of Motorcycle maintenance)Robert M. Pirsig.(not introduced in China)Some people's attitude toward programming is that it's a way to pay bills. It's not enough for others ... Our work is an important part of our lives, and we need a philosophical understanding of what he means. The book delves into the relationship between engineering a

such as the famous GNU (GNU ' s not Unix), PHP (Php:hypertext preprocessor) Reply content:Cool. Because it's interesting. Douglas Hofstadter was first used, in the set of the wall [1] wrote the abbreviation of God, "God over Djinn", the book became in 1976, later known as recursive acronym [2]. Later hackers like to make this joke at the time of naming, and GNU is a little later. Excerpted from Wikipedia

For example, the famous GNU (GNUsNotUnix), PHP (PHP: HypertextPreprocessor) such as the famous GNU (GNU's Not Unix), PHP (PHP: Hypertext Preprocessor) reply content: cool. It's interesting. It was first used by Douglas Hofstadter. in the collection of different walls [1], he wrote the abbreviation GOD, "GOD Over Djinn". It was written in 1976 and was later called recursive acronym [2]. Later, hackers liked

compiling (Dragon book) Recommended Number: 462 I was surprised that no one mentioned the Dragon book. (Perhaps it has been recommended, I do not see). I have never forgotten the cover of the first edition of this book. This book lets me know how wonderful the compiler is. -DB 11. "The Simple design pattern" Recommended Number: 445 I know that gang's "design pattern" is a standard book, but it's better to look at this tome first, this book is more simple. Once you understand the basic principl

. --peter Coulton10. "Compiling Principle" (Dragon book)Recommendations: 462Compilers:principles, techniques, and tools compiler principles: principles, techniques and toolingI was surprised that no one mentioned the Dragon book. (Maybe it's been recommended, I didn't see it). I have never forgotten the first cover of the book. This book has let me know how wonderful the compiler is. -DB11. "In the design mode"Recommendations: 445I know that gang of four's "design Model" is a standard book, but

them to programming dialogs. --chris Jester-young8. The myth of man and MonthRecommendations: 5889. The Art of computer programmingRecommendations: 542This is a book that Gartner has devoted his efforts to writing. --peter Coulton10. "Compiling Principle" (Dragon book)Recommendations: 462I was surprised that no one mentioned the Dragon book. (Maybe it's been recommended, I didn't see it). I have never forgotten the first cover of the book. This book has let me know how wonderful the compiler is

deep reading, I recommend Douglas Houshida (Douglas Hofstadter) "Del, Aysil, Bach book."He deeply studied the problems programmers face every day: recursion, validation, proving, and Boolean algebra.This is a very good reading, difficult, occasional challenges, once you want to fight the end, it will be very worthwhile. –jonik13, "Code Clean Road"Recommendations

recommended, I didn't see it). I have never forgotten the first cover of the book. This book has let me know how wonderful the compiler is. -DB 11. "In the design mode" Recommendations: 445 I know that gang of four's "design Model" is a standard book, but it is better to look at this tome first, the book is more simple. Once you understand the basic principles, you can look at Gang of Four's Bible. -Calanus 12. "The Aysil, the Book of Bach: The Grand of the different Choi" Recommendations: 437

know how wonderful the compiler is. -DB11. "In the design mode"Recommendations: 445I know that gang of four's "design Model" is a standard book, but it is better to look at this tome first, the book is more simple. Once you understand the basic principles, you can look at Gang of Four's Bible. -Calanus12. "The Aysil, the Book of Bach: The Grand of the different Choi"Recommendations: 437If the next Ang really deep reading, I recommend Douglas Houshida