Newsletter   Secure Checkout   Shopping Cart (0 Items)  
Search:    Welcome Guest! Save up to 30-40% on most items with our awesome everyday discounts!

Why Things Are: How Complexity Theory Answers Lifes Toughest Questions [Hardcover]

Our Price $ 17.47  
Retail Value $ 24.95  
You Save $ 7.49  (30%)  
Item Number 246590  
Buy New $17.47
Available on the Internet only.

Item description for Why Things Are: How Complexity Theory Answers Lifes Toughest Questions by William Roetzheim...

Why Things Are: How Complexity Theory Answers Lifes Toughest Questions by William Roetzheim

Promise Angels is dedicated to bringing you great books at great prices. Whether you read for entertainment, to learn, or for literacy - you will find what you want at!

Item Specifications...

Pages   233
Est. Packaging Dimensions:   Length: 8.6" Width: 5.7" Height: 0.8"
Weight:   0.9 lbs.
Binding  Hardcover
Release Date   Feb 15, 2007
Publisher   Level 4 Press
ISBN  1933769262  
ISBN13  9781933769264  

Availability  20 units.
Availability accurate as of Oct 23, 2016 11:30.
Usually ships within one to two business days from La Vergne, TN.
Orders shipping to an address other than a confirmed Credit Card / Paypal Billing address may incur and additional processing delay.

More About William Roetzheim

Register your artisan biography and upload your photo! Are You The Artisan or Author behind this product?
Improve our customers experience by registering for an Artisan Biography Center Homepage.

Product Categories

1Books > Subjects > Professional & Technical > Professional Science > Mathematics > Chaos & Systems
2Books > Subjects > Professional & Technical > Professional Science > Physics > System Theory
3Books > Subjects > Science > General
4Books > Subjects > Science > Mathematics > Chaos & Systems
5Books > Subjects > Science > Physics > Acoustics & Sound
6Books > Subjects > Science > Physics > System Theory

Reviews - What do customers think about Why Things Are: How Complexity Theory Answers Lifes Toughest Questions?

Genetic Algorithms - Convergence - Assisted by reduction through observed rules  Aug 28, 2007
1. Genetic programs involve large numbers of separate computer programs or rules, each of which is random in its ability to solve a given program.

2. The programs or rules that are the most successful in one generation are kept, mated with each other and occasionally mutated, reproduced, and put back into the fray to once again test their ability to solve the problem.

3. After time and sometimes thousands of generations that remain rules or programs are highly effective at solve the give set of problems.

4. For genetic algorithms to work, you need to be able to succinctly tell the computer the current state, which can consist of both the internal sate that acts as a form of status and the current values for all inputs, called the machine receptor. The state and receptor information is encoded in a string of digits. The values in the string are inputs to the genetic algorithm. A. Start by defining and listing the states in which the system can exist. B. Define the environmental input variables that need to available to the system. The system can only solve programs if the needed data is available to it. C. Define the range of possible values for each of the environmental inputs. D. Map the states and environmental inputs into the string.

5. Consider tic-tac-toe, the states are (won-me) or (won-you). String values are B,O,X and (M=my turn and Y=Your turn. The grid holds cells from 0 to 8 and a end cell for mine or your turn. The Input string BBBBBBBBBM could have one or more transition inputs, such as BBBBXBBBBY or XBBBXBBBBY. GA use wild card rules to solve the problem of multiple transitions. These rules act as defaults, being available for triggering when no more specific rule seems appropriate. ****B*****Y rule matches on any board configuration that has a blank in the center. "There are 57 possible 'boards' that X has to be able to respond to, and only 38 possible boards that O will ever encounter " says Paul Thiessen. Thiessen discovered it is an advantage to have the first move, 6-10 generation convergence. GA complexity can be reduced by intelligently limiting genes by observed rules. GA are not total random. Complexity is reduced by intelligently apply observed rules and rewards.

6. Solutions are the result of converging to a global min on a gradient 3d map. Mutation perturbs the system helping the GA from getting caught in a local minimum. Over time bad rules are weeded out and the program is left with the good rules. The number of rules to randomly generate depends on the number of possible input strings. The larger the number of input strings, the more rules are needed to cover a somewhat percentage of the possible values. A relatively few number of rules can handle a large range of situations.

7. Genetic Algorithm: 1. Initialize the population, P1 2. Create an empty population P2. 3. Select two individuals from P1 base on fitness criterion 4. Optimally mate and replace with offspring 5. Optimally mutate the individuals 6. Add the individuals to P2, until P2 is full. Let P1 be equal to P2.

Write your own review about Why Things Are: How Complexity Theory Answers Lifes Toughest Questions

Ask A Question or Provide Feedback regarding Why Things Are: How Complexity Theory Answers Lifes Toughest Questions

Item Feedback and Product Questions
For immediate assistance call 888.395.0572 during the hours of 10am thru 8pm EST Monday thru Friday and a customer care representative will be happy to help you!

Help us continuously improve our service by reporting your feedback or questions below:

I have a question regarding this product
The information above is incorrect or conflicting
The page has misspellings or incorrect grammar
The page did not load correctly in my browser or created an error.

Email Address:
Anti Spam Question. To combat spammers we require that you answer a simple question.
What color is the sky?
Leave This Blank :
Do Not Change This Text :

Add This Product Widget To Your Website

Looking to add this information to your own website? Then use our Product Widget to allow you to display product information in a frame that is 120 pixels wide by 240 pixels high.

    Copy and paste the following HTML into your website and enjoy!

Order toll-free weekdays 10am thru 10pm EST by phone: 1-888-395-0572 (Lines are closed on holidays & weekends.)
Customer Service | My Account | Track My Orders | Return Policy | Request Free Catalog | Email Newsletter

Gift Certificates
RSS Feeds
About Us
Contact Us
Terms Of Use
Privacy Policy