For the 2-gaussian data, the original order converges in less
than 10 epoches, the reshuffled version converges even
faster, sometimes within one or two iteration.
Notesontheimplementationpart.
Theper
CS434 Midterm Spring 2016
Solutions
Name (Please print):
1. You have 80 minutes to finish the exam.
2. There are 6 pages in this exam (including cover page), please write down your initials on top of
CS 440
Database Management Systems
Parallel DB & Map/Reduce
Some slides due to Kevin Chang
1
Parallel vs. Distributed DB
Fully integrated system, logically a single
machine
No notion of site autonom
Linear Regression
CS434
Supervised learning
A regression problem
We want to learn to predict a persons height
based on his/her knee height and/or arm span
This is useful for patients who are bed bou
Support Vector Machines
CS434
Linear Separators
Many linear separators exist that perfectly
classify all training examples
Which of the linear separators is the best?
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Intuition of
CS 440
Database Management Systems
Logging & Recovery
1
Review: The ACID properties
A tomicity: All actions in the Xact happen, or none happen.
C onsistency: If each Xact is consistent, and the DB sta
Neural Networks
Neural Network Neurons
1
Biologically inspired
Receives n inputs (plus a bias term)
Multiplies each input by its weight
Applies activation function to the sum of results
Outputs result
CS434 Practice problems Solution will be posted on May 8th, 2017
Regression and regularization
1. For a regression problem, if we do not introduce the bias term in learning, what impact will it has on
CS 440
Database Management Systems
Lecture 8: Concurrency Control
1
Concurrent access to data
Flight (fltNo, fltDate, seatNo, seatStatus)
Database: seats 22A and 22B are available.
1.
2.
3.
4.
John ch
Bayes and Nave Bayes
Classifiers
CS434
In this lecture
1. Review some basic probability concepts
2. Introduce a useful probabilistic rule Bayes rule
3. Introduce the learning algorithm based on
Bayes
CS 372 Introduction to Computer Networks
Programming Assignment #1
Due Sunday, end of Week 5, by 11:59pm
Submit the source files, Makefile, and README in a .zip file to Canvas.
Objectives:
1. Implemen
HW W3Par rtIIso olution n
PARTII: : 1. Define functional margin and geomet margin. Explain why functional margin is no a D n tric y ot good objectiv to optimiz in order to learn a max ve ze o ximum ma
CS434 Midterm Fall 2012
Solutions
Name (Please print):
1. You have 50 minutes to nish the exam.
2. There are 7 pages in this exam (including cover page), please write down your initials on top of EVER
1. ( 23 pts) Short questions. The answers should be short (no more than 3 or 4 sentences typically). a. (5 points) In the following classification problem, start with a decision boundary shown in the
CS 440
Database Management Systems
NoSQL & NewSQL, Contd.
Some slides due to Magda Balazinska
1
Scaling by partitioning & replication
Partition the data across machines
Replicate the partitions
Goo
CS434 Midterm Spring 2015
2pm - 3:20pm Thur, May 14th
Name (Please print):
1. You have 80 minutes to finish the exam.
2. There are 6 pages in this exam (including cover page), please write down your i
CS 440
Database Management Systems
NoSQL & NewSQL
1
Motivation
Web 2.0 applications
thousands or millions of users.
users perform both reads and updates.
How to scale DBMS?
Vertical scaling: movi
1. Short questions.
(a) (6 pts) Consider the following two strategies for avoid overtting in decision tree and explain what are
the key advantages and disadvantages of them.
Early stopping, -i.e., ste