Data mining
Question 1: Business Applications of Data Mining
(Web/Library research) List some business applications of data mining techniques. Case studies
and success stories will be helpful to you.
. See for example: http://www]01.ibm.com/software/success/cssdb.nsf/CS/STRD] 8QSKHK?OpenDocument&Site=spss&cty=en_us
o This is just one example of a place to find case studies and success stories. You should find
at least one other reference to use for this assignment
. Create a table that lists:
. Each business application (including a brief description of the business objective and the
company/companies that have used or could use data mining for these
applications/business-objectives)
o Example business application: Predicting responses to a marketing campaign
. The data mining techniques/algorithm(s) that are/were helpful in achieving the business
objective for each business application
o Your syllabus lists some of the most popular data mining techniques
. Possible/typical outputs of data mining in that business application area
o Example outputs: Married women with one or more children are more likely to
respond to the campaign People who buy chili are more likely to by antacids
etc.
. The web-address of the page where you found the information or the citation for the
article or book where you found the information. You are required to provide at least 3
different web-addresses/citations.
(300-400 words [approx. 1 page]; 10 points).
Question 2: The Data Mining Process
Describe the industry standard CRISP-DM data mining process model
(http://www.dataminingtechniques.net/data]mining]tutorial/data]mining]processes/) and
SASs SEMMA model
(http://www.sas.com/offices/europe/uk/technologies/analytics/datamining/miner/semma.htm
l )
. Choose one of your business applications from Question 1 illustrate the usage of either
CRISP-DM or SEMMA for that application: e.g. in the data preparation phase of CRISPDM
describe the specific data sources you would use for that application etc.
Further Instructions for Assignment 1
. For question 1 you should format your answer as a table with the headings business
objective companies (that do or could pursue this data mining objective) data mining
algorithm/technique sample output and web address as requested in the question.
o Also you should give specific answers. For example a business objective of provide
payment processing solutions is not specific enough; rather say produce a model to
score transactions and identify the transactions most likely to be fraudulent.
o Similarly for outputs of data mining company lowers percentage of fraudulent
transactions is fine as a general goal but give me more details of possible specific
outputs: e.g. give example rules that could be produced like large transactions by
people in Queens who have held accounts for less than 6 weeks are likely to be
fraudulent.
. For question 2 on the application of data mining techniques make sure to describe both the
CRISP-DM and SEMMA processes. However you only need to apply one of them
(preferably CRISP-DM).
o The goal is to provide good descriptions of how specifically to apply each of the 6
stages of the process to your particular case.
o More importantly you should give specific actions for each phase of the data mining
process when explaining how the process could be applied to your particular case.
. For example understand data is not specific enough and would not earn you
any of the points for the application part of the question; instead under the
heading data understanding give details like gather customer data from
internal database including customer identifier age purchase history .
. Similarly prepare data is not detailed enough. Instead under the heading
data preparation write bin the customers into 5 equal bins by income
attribute; compute aggregates for past 3 months past 6 months and past 12
months customer purchases .
. Under the heading evaluation you might explain that a model that picks
fraudulent transactions with 98% recall and 80% precision is probably
sufficient and that low recall is costly because each fraudulent transaction that
falls through our checks is expensive whereas low precision is not too costly
as transactions that were rejected falsely do not lose us a lot of profits.
. (Model evaluation is dealt with more detail in lectures after the
assignment is due; you should have picked up knowledge about
evaluation criteria from reading the Two Crows reading).
o For the deployment phase (of CRISP-DM) you should explain how the Company
could exploit (profit from) the model produced and what specific actions they did or
could take: e.g. they could use the model to score prospects and email high-scoring
customers. Obviously the details would depend on the application you chose but the
important thing is to be specific and apply the process to your particular application.
. Always cite the source of any comparative performance figures or seemingly
unsubstantiated data which you give.

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Represent a signal in a discrete time form and to be able to understand how to process it;
Characterize a DT system in DSP and its transfer function;
Analyze the system in Time plane, Z plane and frequency plane;
Guidelines:
Please add front title page with your answers uploaded on Moodle.
Each question carries 20 marks.
Assignment answers must be computer typed. Please do not write question statement. Just mention the question number.
Font – Times New Roman
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Softcopy is to be submitted through Moodle Turntin.
Explain with suitable diagrams wherever required.
The final assignment must have a Title Page, table of contents, references/ bibliography and page number.
Heading should be with Font Size 14, Bold, and Underline.
Each student has to do the assignment individually.
You can refer books in Library or use internet resource. But you should not cut and paste material from internet nor provide photocopied material from books. The assignment answers should be in your own words after understanding the matter from the above resources.
Rules & Regulations
If any coursework assessment is found to be copied from other candidates using unacceptable means, then it shall be cancelled and the total marks awarded will be zero. No chance of resubmission or appeal will be given*.
Your source of information should be mentioned in the reference page clearly. (For example: If it’s from book, you have to mention the full details of the book with title, author name, edition and publisher’s name. If it is from the internet you have to mention the correct URL). Otherwise the assignment will be considered as plagiarized*.
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Date of submission 26.12.2016
* Refer to the MIG for MEC policy on academic integrity and late submission.
1. Consider a casual system with input x[n]and output y[n]. If the input is given by
x[n]=3^(1-n) u[n]-4^(n+1) u[-n-1],
The output has a z-transform given by
Y(z)=(1+z^(-1)-z^(-2))/(1-1/3 z^(-1) )(1-4z^(-1) )
Determine the z-transform of the input x[n]. (10 Marks)
Find all possible choices for the impulse response of the system. (10 Marks)
2. In an image processing application a digital signal processing system is represented by
y(n)=med{x(n-3),x(n-2),x(n-1),x(n),x(n+1),x(n+2),x(n+3)}; where the operation med{} is given by the algorithm: arrange values in the ascending order and the answer is the middle value. For eg: med(5,3,9}=5. Whether the system is
Causal (3 Mark)
Linear (10 Marks)
time invariant system (7 Marks)
Justify your answers.
3. Two causal filters having frequency response H1(?)=1/(1-0.5e^(-j?) ) and H2(?)= (sin2?/sin0.5? e^(-j1.5?) )^2 . Compute the coefficients of h (n) where h (n) is the inverse DTFT of H(?). Let H(?)=1/2p [H1(?)*H2(?)]. (20 Marks)
4. a. The basic radix-2 FFT algorithms based on decimation-in-time are indicated in the text, Figures 5 and 6. For each of these eight flow-graphs indicate whether or not each of the following properties is true or not with necessary justifications.
Represents an in-place computation
Input is in normal order
Output is in normal order
Coefficients should be stored in bit-reversed order
Accessing of the data is identical for every array. (10 Marks)
b. If x(n)=[1,2,3,2,1,0,1,2] calculate FFT using the flow graph given in Figure 5. (10 Marks)

Figure 5

Figure 6
5. Consider the given sequences:
m[n]=u[n]-u[n-6],
p[n]=d[n]+2d[n-2]+d[n-4],
h[n]=m[n]*p[n]
Determine and sketch the sequence h[n]. (7 Marks)
Determine and sketch the sequence r[n] such that r[n]*m[n]=?_(k=-8)^(n-1)¦h[k] , (6 Marks)
Is h[-n]=m[-n]*p[-n]? Justify your answer. (7 Marks)

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The post Consider a casual system with input x[n]and output y[n]. If the input is given by x[n]=3^(1-n) u[n]-4^(n+1) u[-n-1], The output has a z-transform given by Y(z)=(1+z^(-1)-z^(-2))/(1-1/3 z^(-1) )(1-4z^(-1) ) Determine the z-transform of the input x[n]. (10 Marks) appeared first on homework handlers .