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 is the difference between in two lines of verilog code, What is the di...

What is the difference between the following two lines of Verilog code? #5 a = b; a = #5 b; #5 a = b; Wait five time units before doing the action for "a = b;". Value assig

Programming for arithmetic and string operations, Advanced aspects of assem...

Advanced aspects of assembly language programming in this section. A number of these aspects give assembly an edge over high level language programming as far as efficiency is conc

Using bit wise operator implement nor and nand gate, Q. Write a program t...

Q. Write a program to implement NOR, NAND, XOR and XNOR gates using and without using bit wise operator. Also perform necessary checking. The user has option to give n numbe

Processor, what is the difference between i5 and i7 processor?

what is the difference between i5 and i7 processor?

What are the advantages of interviewing, What are the Advantages of Intervi...

What are the Advantages of Interviewing - Opportunity to motivate interviewee to give open and free answers to analyst's questions    -  allows analyst to probe for more f

Load sharing facility resource management, The primary aims/details of Load...

The primary aims/details of Load Sharing Facility Resource Management Software(LSFRMS) are good resource utilization by routing the task to the most appropriate system and good uti

Mating - canonical genetic algorithm, Mating: Therefore once our GA ag...

Mating: Therefore once our GA agent has chosen the individuals lucky sufficient as actually there  fit enough to produce offspring then we next determine how they are going to

Determine about the blocking suspicious behaviour, Determine about the bloc...

Determine about the blocking suspicious behaviour The response could be spontaneous and automatic, with an option to generate the alert message manually. The history recorded i

No. of decimal places for output within a write statement, The no of decima...

The no of decimal places for output can be describes within a write statement. This statement is right. Write:/ decimals 2.

How online databases work, How Online Databases Work? An online or web-...

How Online Databases Work? An online or web-based database keeps data on a cloud of servers somewhere on the Internet, which is accessible by any authorized user with an Intern

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