Forward checking - artificial intelligence, Computer Engineering

Assignment Help:

Forward checking:

Whether to add some sophistication to the search method there constraint solvers use a technique called as forward checking. So here the general idea is to work the like as a backtracking search but, where checking compliance with constraints behind assigning a  value to a variable there the agent also checks when this assignment is going to break constraints with  future variable assignments. Hence is supposing that Vc has been assigned to the current variable c, after then for each unassigned variable xi, as temporarily remove all values from Di that along with Vc break a constraint. Thus it may be that in doing so, Di becomes empty. Because the choice of Vc for the current variable is bad  -  so however it will not find its way into a solution to the problem just because there's no way to assign a value to xi without breaking a constraint. In that condition even though the assignment of Vc may not break any constraints such that already assigned variables so a new value is chosen as or backtracking occurs whether there are no values left, just because we know that V  is a bad assignment. 

Here the next diagram like again, taken from Smith's tutorial to shows how forward checking improves the search for a solution to the 4-queens problem as;:. 

2484_Forward checking.png

In such a scenario to forward checking, to improve the intelligence of the constraint solving agent so there are some possibilities for a heuristic search. Therefore firstly, our agent can worry about the order such that looks at the variables, that is, in example of the 4-queens problem so it might try to put a queen in row 2, after then one in row 3, one in row 1 and then finally one in row 4. Moreover a solver taking such care is said to be utilizing a variable-ordering heuristic. Conversely the ordering of variables can be done earlier than a search  is started and rigidly adhered to during the search. In fact this might be a good idea whether there is extra knowledge about the problem, like an example that a particular variable should be assigned a value sooner quite than later. In such a scenario  the ordering of the variables can be done dynamically so in response to some information gathered about that how the search is progressing during the search procedure.


Related Discussions:- Forward checking - artificial intelligence

Translate the following sentences into predicate logic, Translate the follo...

Translate the following sentences into predicate logic. Give as much structure as possible. Provide a translation key for each predicate letter and individual constant. In your tra

Factors of information system which affect the business, Q. Factors of Info...

Q. Factors of Information system which affect the business? There are several factors which affect the business such as - a) Threats of fresh entrants. b) Rivalry surro

Quiz help, which two class die class contain in computer programing.

which two class die class contain in computer programing.

Explain about theta notation, Q. Explain about Theta Notation? Theta Θ...

Q. Explain about Theta Notation? Theta Θ Notation : The set Θ (g(n)) comprises all functions f(n) for that there exist positive constants c1,c2 such that f(n) is squeezed in b

Problems for decision tree learning, Appropriate Problems for Decision Tree...

Appropriate Problems for Decision Tree Learning : However remember there that is a skilled job in "AI" to choose exactly the right learning representation ormethod for a parti

Cemistry, Discuss scales and sludge

Discuss scales and sludge

Id3 algorithm - artificial intelligence, Th e ID3 algorithm The cal...

Th e ID3 algorithm The calculation for information gain is the very difficult phase of this algorithm. ID3 performs a search whereby the search states are decision trees an

Convert the octal number 7401 to binary, Convert the octal number 7401 to B...

Convert the octal number 7401 to Binary. Ans. Octal number 7401 to Binary conversion: Every octal digit represents 3 binary digits. To change an octal number to binary number,

Provision for data buffering, Data buffering is quite helpful for purpose o...

Data buffering is quite helpful for purpose of smoothing out gaps in speed of processor and I/O devices. Data buffers are registers that hold I/O information temporarily. I/O is pe

The concept of electronic cash, The concept of electronic cash is to implem...

The concept of electronic cash is to implement payment by Using computers over network

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