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

What are the dynapro keywords, What are the dynapro keywords? FIELD, MO...

What are the dynapro keywords? FIELD, MODULE, SELECT, VALUES and CHAIN are the dynapro keywords

Explain segmentation, Explain segmentation? Segment memory addressing ...

Explain segmentation? Segment memory addressing divides memory into many segments. Each of these segments can be considered as a linear memory space. Every one of these segmen

Explain performance evaluation in parallel computing, Explain Performance E...

Explain Performance Evaluation in parallel Computing In this section, we will discuss the key attributes used to measure performance of a computer system. The performance chara

create a class called auditorium, Create a class called auditorium that sp...

Create a class called auditorium that specifies the seats in the auditorium. The class should include at least one data item: seat (two dimensional array of Char) and at least thre

Relationship between distributed and mobile computing, a) Briefly describe...

a) Briefly describe the relationship between distributed computing, mobile computing and pervasive computing. b) Suppose the following scenario, which demonstrate the possibili

Calculate max distance so subscriber get speech reproduction, In a subscrib...

In a subscriber loop that contains a series resistance of 300 ohms to protect the batteries in the exchange, a normalized telephone draws 10 mA and its standard input d.c. resistan

Argument be passed to a subroutine in programming, How many ways can an arg...

How many ways can an argument be passed to a subroutine in programming? Ans)  An argument can be passed in two way in a programming language. They are Pass by Value and Passi

What is an interface and what is an abstract class, What is an interface an...

What is an interface and what is an abstract class? Please, expand by examples of using both. Explain why.   In a interface class, all methods are abstract without execution w

Multidimensional arrays defined in terms of an array, How is multidimension...

How is multidimensional arrays defined in terms of an array of pointer? An element in a multidimensional array like two-dimensional array can be shown by pointer expression as

What is the use and function of file transfer protocol, What is the use and...

What is the use and function of File Transfer Protocol? FTP : File Transfer Protocol (FTP) is the protocol used upon the Internet for sending files and is usually used fo

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