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Great file from (ALASTOM) about steam turbine systems.
Reading video and making frames of it using MATLAB
submitt button in php
Computer Networking Tutorials
Foundation Design Books
Foundation Design Books
sigma delta adc mat lab simulation
Do It Yourself - How to Build a Chimney?
Do It Yourself - Handmade Hovercraft
Do It Yourself - How to Build a Compass?
Do It Yourself - How to Build a Battery?
Do It Yourself - How to build a Electric Motor Model?
Anybody....
Load Rejection Test (Governor Test)
Threaded Binary Tree - Concept Explained

Great file from (ALASTOM) about steam turbine systems.

Posted: 26 Dec 2010 02:45 PM PST

THIS FILE SHOWS THE DIFFERENT SYSTEMS ABOUT STEAM TURBINE, FROM ALSTOM COMPANY AT ASBUILT PROJECT IN EGYPT.

Quote:

Description of Steam Turbine Systems_ALSTOM

Description of Steam Turbine Systems_ALSTOM.pdf

for more about
(Thermal Power Station , Steam Power Plant, Electricity Production , Operation and Commissioning)

you can visit
Thermal Power Station , Steam Power Plant , Electricity Production , Operation and Commissioning

Reading video and making frames of it using MATLAB

Posted: 26 Dec 2010 12:48 PM PST

Hi,
I am trying to develop a small project for Content Based Video Retrieval (CBVR), based on the YCbCr components of the frames of the video. I've tried reading the video and making it into frames, but in vain.:confused:

I've tried aviread function. Then, tried Frame = mov(frame).cdata; to get the frame data, which is kept in loop, and some other commands, but couldn't succeed. I've even tried mpegread package, but couldn't even read the mpeg file. :(

Plzzzzz help me out guys... Once I get the frames, I can move further....

Thanks in advnace.....

submitt button in php

Posted: 26 Dec 2010 09:10 AM PST

hello,

i am making a website in php. because this is the only language i am familiar with. and i want to add some attractive buttons in my web sites. but using html only i cant make this happen.

so please somebody tell me how to create some cool looking buttons so that i can add them in my php based website (is it possible to create a button in photoshope and add it on my website ?
if yes then how ?).

thank you..!

Computer Networking Tutorials

Posted: 26 Dec 2010 07:41 AM PST

Hey guys,
I found some computer networking tutorial and I read few topics which sound good to me..
So i am posting it here.

Lecture Notes: Computer Networks (CS425)

If anyone has more resources related to computer networking.
Please post in the same thread.

May be it will be helpful to all.

Foundation Design Books

Posted: 26 Dec 2010 07:24 AM PST

Foundation Design Books

Posted: 26 Dec 2010 07:20 AM PST

sigma delta adc mat lab simulation

Posted: 26 Dec 2010 05:33 AM PST

I am trying to simulate the ∑Δ adc in simulink... on running it thr following error messages are prompted... can anybody help me how to do away with the errors..
1) Only 'double' signals are accepted by block type Integrator. The signals at the ports of 'sigma_delta_adc/Integrator' are of data type 'boolean'.
2) An error occurred while propagating data type 'boolean' from 'sigma_delta_adc/Relay', input port 1.

Do It Yourself - How to Build a Chimney?

Posted: 26 Dec 2010 05:06 AM PST

Do It Yourself - Handmade Hovercraft

Posted: 26 Dec 2010 05:04 AM PST

Do It Yourself - How to Build a Compass?

Posted: 26 Dec 2010 05:03 AM PST

Do It Yourself - How to Build a Battery?

Posted: 26 Dec 2010 05:02 AM PST

Do It Yourself - How to build a Electric Motor Model?

Posted: 26 Dec 2010 05:01 AM PST

Anybody....

Posted: 26 Dec 2010 04:49 AM PST

Does anybody here taken a subject strength of materials???:rolleyes:

Load Rejection Test (Governor Test)

Posted: 26 Dec 2010 04:43 AM PST

Load Rejection Test (Governor Test)

The purpose of Turbine Load Rejection Test is to verify and demonstrate the governor function to sustain a load rejection in order to prevent the turbine from overspeed tripping, steady speed control at no-load operation and remain in service without any adverse effect to the turbine.
The test requires skillful and appropriate operation not only for turbine , but also for boiler and its auxiliaries.

Items to be confirmed for Load Rejection Test
1-Turbine main valves
2-GV no load valve position
3-Lube oil pump auto start test
4-Protective device test
5-Valve transfer from MSV mode to GV mode
6-Overspeed tripping point (111% speed)
7-OPC (Overspeed Protection Controller) function
8-Exclusion of Interlocks (Turbine Trip due to Boiler Trip)

TEST PROCEDURE

*Before Load Rejection Test (one hour)
1-Confirm steady condition of load operation
2-Perform mechanical Over Speed Oil trip Test
3-Perform Lub. oil pump auto start test
4-change over unit auxiliary bus from unit auxiliary transformer to start up transformer.

*Before Load Rejection Test (30 minutes)
1-Confirm that level of( Condenser , De aerator and HP/LP feed water heaters are within range
2-confirm that AVR in automatic mode
3-Confirm that HP and LP Turbine bypass ( valves and Sprays ) are in automatic mode

*Before Load Rejection Test (10 minutes)
1-confirm the appointed time with the load dispatcher
2- Exclude the interlock of (Turbine Trip due to Boiler Trip)

*Before Load Rejection Test (0 minute)
1-Open Circuit breaker of the Generator.
2-If the Overspeed trip device doesn't operate contrary to expectations even when the turbine speed exceeds 111% of the rated speed , Trip immediately the turbine.
3-All observers shall read and record "Maximum or Minimum" of the measuring objects during transient condition

After Load Rejection
Pay attention to the following points and see that there is no distinction about them.
-Turbine speed
-Rotor Position & Vibration
-BRG temp. and Vibration
-Condenser Vacuum and hotwell level

Stabilization
-Stabilization will be judged when turbine speed is stabilized approx. 3000 rpm by GV & ICV speed control

Test Acceptance Criteria
If maximum instantaneous speed is restricted below overspeed trip limits (111 %) ,therefore the load rejection test is regarded as successful.

Confirmation items after Stabilizing
-GVs are restored in no load position
-turbine speed is controlled at near synchronous level
-No abnormality is observed at electrical room and local positions.

Emergency Case
If boiler trips by boiler protection , turbine shall be immediately tripped.

Threaded Binary Tree - Concept Explained

Posted: 26 Dec 2010 04:42 AM PST

In the linked representation of a binary tree, additional space is required to store the two links of each node.
For leaf nodes, these fields always have nil values as there are no left or right sub-trees present.
To remove this drawback of memory wastage, the concept of threaded binary tree was developed. In this type of tree, the empty links are replaced by pointers, called threads which point to some other node of the tree.

If the left child of a node of a tree is null (or empty) it will be replaced by a thread (i.e. a pointer) to that node which appears just before that node, when the tree is traversed in inorder.

Similarly, if a right child of the node is null (or empty) it will be replaced by a thread (i.e. a pointer) to that node which appears just after that node, when the tree is traversed in inorder.
Such threads are called inorder threads.
We also have preorder and postorder threads.

The left thread gives predecessor and the right thread gives successor node.

The node of a threaded binary tree can be declared as:

enum boolean
{
int false = 0;
int true = 1;
};
struct threadedtree
{
enum boolean left;
struct threadedtree *leftchild;
int data;
enum boolean right;
struct threadedtree *rightchild;
}

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Sunday, December 26, 2010

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