كتاب الامير ل مكيافيللي
"الغاية تبرر الوسيلة "
24 February 2015
Steven S. Skiena
The Algorithm Design Manual
Second Edition
from top 10 books ever
Most professional programmers that I’ve encountered are not well prepared to
tackle algorithm design problems. This is a pity, because the techniques of algorithm
design form one of the core practical technologies of computer science. Designing
correct, efficient, and implementable algorithms for real-world problems requires
access to two distinct bodies of knowledge:
tackle algorithm design problems. This is a pity, because the techniques of algorithm
design form one of the core practical technologies of computer science. Designing
correct, efficient, and implementable algorithms for real-world problems requires
access to two distinct bodies of knowledge:
• Techniques – Good algorithm designers understand several fundamental algorithm design techniques, including data structures, dynamic programming,
depth-first search, backtracking, and heuristics. Perhaps the single most important
design technique is modeling, the art of abstracting a messy real-world
application into a clean problem suitable for algorithmic attack.
• Resources – Good algorithm designers stand on the shoulders of giants.
Rather than laboring from scratch to produce a new algorithm for every task,
they can figure out what is known about a particular problem. Rather than
re-implementing popular algorithms from scratch, they seek existing implementations to serve as a starting point. They are familiar with many classic
algorithmic problems, which provide sufficient source material to model most
any application.
This book is intended as a manual on algorithm design, providing access to
combinatorial algorithm technology for both students and computer professionals.
It is divided into two parts: Techniques and Resources. The former is a general
guide to techniques for the design and analysis of computer algorithms. The Resources section is intended for browsing and reference, and comprises the catalog.
combinatorial algorithm technology for both students and computer professionals.
It is divided into two parts: Techniques and Resources. The former is a general
guide to techniques for the design and analysis of computer algorithms. The Resources section is intended for browsing and reference, and comprises the catalog.
23 February 2015
22 February 2015
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DERIVATIVES OF
TRIGONOMETRIC FUNCTIONS
The derivative of sin x
| d dx |
sin x | = cos x |
To prove that, we will apply the definition of the derivative (Lesson 5). First, we will calculate the difference quotient.
| sin (x + h) − sin x h |
= |  |
, Problem 1, |
| = |  |
, on dividing numerator and denominator by 2, |
|
| = |  |
||
We will now take the limit as h 
0. But the limit of a product is equal to the product of the limits. (Lesson 2.) And the factor on the right has the form sin θ/θ. Therefore, according to the Lemma, as h 0 its limit is 1. Therefore,
0. But the limit of a product is equal to the product of the limits. (Lesson 2.) And the factor on the right has the form sin θ/θ. Therefore, according to the Lemma, as h 0 its limit is 1. Therefore,| d dx |
sin x | = cos x. | what about knowing more ?? from here http://www.themathpage.com/acalc/sine.htm#sine |
21 February 2015
How to setup ORACLE DB 11g express edition
Oracle Database Express Edition 11g Release 2 installation guide
first you must have the setup source file
if you have not
download it from here
after that >> run the setup file
1-wait for loading
2- next
then >>>>
what about downloading the rest of setup steps ;)
from here you can go
https://drive.google.com/file/d/0BwJ7hHWYCk-VeWZ0T2M0NVVQak0/view?usp=sharingregards.
M.Elshennawy
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