Learning algorithm for multi-layered networks, Computer Engineering

Assignment Help:

Learning algorithm for multi-layered networks:

Furthermore details we see that  if S is too high, the contribution from wi * xi is reduced. It means that t(E) - o(E) is multiplied by xi after then if xi is a big value as positive or negative so the change to the weight will be greater. Here to get a better feel for why this direction  correction works so it's a good idea to do some simple calculations by hand. 

Here η simply controls how far the correction should go at one time that is usually set to be a fairly low value, e.g., 0.1. However the weight learning problem can be seen as finding the global minimum error which calculated as the proportion of mis-categorised training examples or over a space when all the input values can vary. Means it is possible to move too far in a direction and improve one particular weight to the detriment of the overall sum: whereas the sum may work for the training example being looked at and it may no longer be a good value for categorising all the examples correctly. Conversely for this reason here η restricts the amount of movement possible. Whether large movement is in reality required for a weight then this will happen over a series of iterations by the example set. But there sometimes η is set to decay as the number of that iterations through the entire set of training examples increases it means, can move more slowly towards the global minimum in order not to overshoot in one direction.

However this kind of gradient descent is at the heart of the learning algorithm for multi-layered networks that are discussed in the next lecture. 

Further Perceptrons with step functions have limited abilities where it comes to the range of concepts that can be learned and as discussed in a later section. The other one way to improve matters is to replace the threshold function into a linear unit through which the network outputs a real value, before than a 1 or -1. Conversely this enables us to use another rule that called the delta rule where it is also based on gradient descent.


Related Discussions:- Learning algorithm for multi-layered networks

Advantages and disadvantages of e-commerce, E-commerce is one of the most s...

E-commerce is one of the most significant aspects of the internet. Having emerged recently and growing at a steady state, it becomes essential to look at the advantages and disadva

Command line argument value, Make a console application to show different m...

Make a console application to show different messages depending on the command line argument value. Use Select-case statements.(same to switch block)

What is accumulator register, Q. What is Accumulator Register? Accumula...

Q. What is Accumulator Register? Accumulator Register (AC):  This register is used to store data temporarily for computation by Arithmetic and logic unit (ALU).  AC generally c

Poor technology or system requirements definition, Poor Technology or Syste...

Poor Technology or System Requirements Definition - Information System Previously we looked at product design and specifically the importance of requirements capture as part o

What is a cgi bin directory, A CGI bin directory is a special directory on ...

A CGI bin directory is a special directory on the server where CGI scripts are allowed to be implemented. Most servers are configured to only permit CGI scripts to be implemented f

Depth first search - artificial intelligence, Depth First Search - artifici...

Depth First Search - artificial intelligence: Depth first search is very similar to breadth first, except for that the things are added to the top of this agenda rather than o

What specifies by environment variable in cgi script, The Environment varia...

The Environment variable SCRIPT_NAME in CGI script specifies? In CGI script gives the path of URL after server name.

Differences between inter statement and intra statement, Differences betwee...

Differences between inter statement and intra statement delay? //define register variables reg a, b, c; //intra assignment delays initial begin a = 0; c = 0;

Can you list out some of enhancements in verilog 2001, Can you list out som...

Can you list out some of enhancements in Verilog 2001? In  earlier  version  of  Verilog,  we  use  'or'  to  specify  more  than  one  element  in  sensitivity  list.  In Veri

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd