Consider this correlogram: 1.0 0.8 0.6 ACF 0.4 0.2 0.0 -0.2 0 5 10 15 Lag Select all of the following which are true about this plot: Select one or more: This plot is comparing a time series with itself. There are no significant correlations at lags > 0. The plot shows periodic autocorrelations between two different series. The plot shows two different time series that have a similar cycle. This could be a series with randomly generated values. 20

Consider this correlogram: 1.0 0.8 0.6 ACF 0.4 0.2 0.0 -0.2 0 5 10 15 Lag Select all of the following which are true about this plot: Select one or more: This plot is comparing a time series with itself. There are no significant correlations at lags > 0. The plot shows periodic autocorrelations between two different series. The plot shows two different time series that have a similar cycle. This could be a series with randomly generated values. 20

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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For the following question, use the mapping given in the table. A B C D E F G H I J S Z D U F R B K L M K L M N O P Q R S T J V G N A Q O Y W I U V W Z Y Z E C T H P X Encrypt the following: Pure calculation is, in its way, the poetry of logical way of thinking. Decrypt the message with shift of 3. Open WindowDecrypt the message with shift of 25. Open
Here__Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by water. Example 1: Input: grid = [ ["1","1","1","1","0"], ["1","1","0","1","0"], ["1","1","0","0","0"], ["0","0","0","0","0"] ] Output: 1 Example 2: Input: grid = [ ["1","1","0","0","0"], ["1","1","0","0","0"], ["0","0","1","0","0"], ["0","0","0","1","1"] ] Output: 3.
Given X = {1, 2, 5, 8, 9}, Y = {3, 4, 6, 7, 8}, Z = {1, 2, 4, 6, 8} and U = {1, 2, 3, 4, 5, 6, 7, 8, 9}. Findthe following: 1. (X -Z̅) ∪ Y2. (X̅ ∪ Z) ∩ Y3. (Y ∩̅Z) ∩ X4. (X ∩ Z) - (X ∪ Y)5. Z̅ – (Y ∩ X)
Answer asap !!!! Can not use any control constructs such as if, do, while, for, switch, etc. /* * bitCount - returns count of number of 1's in the bit pattern for x * Examples: bitCount(5) = 2, bitCount(7) = 3 * Legal ops: ! ~ & ^ | + << >> * Max ops: 40 * Rating: 4 */ int bitCount(int x) { return 2; } /* * conditional - same as x ? y : z * Example: conditional(2,4,5) = 4 * Legal ops: ! ~ & ^ | + << >> * Max ops: 16 * Rating: 2 */ int conditional(int x, int y, int z) { return 2; } /* * minusTwo - return a value of -2 * Legal ops: ! ~ & ^ | + << >> * Max ops: 2 * Rating: 10 */ int minusTwo(void) { return 2; } * TMax - return maximum two's complement integer * Legal ops: ! ~ & ^ | + << >> * Max ops: 6 * Rating: 10 */ int tmax(void) { return 2; }
Gap in playback is a common problem exiting in multimedia applications transmitted using the isochronous data transmission approach shown in class. What is the method used to solve the problem?
It will simulate the diffusion of heatthrough a square metal plate. The plate starts off at 0 deg., but the 4 ×4 pixel square in the centeris kept at 100 deg.Now a cell in the interior has 4 neighbors: the upper, lower, left, and right neighbor. The updateformula for an interior point (other than the center square) is therefore given by:u′i,j = ui,j + k((ui,j+1 −ui,j ) + (ui,j−1 −ui,j ) + (ui−1,j −ui,j ) + (ui+1,j −ui,j ))= ui,j + k(ui,j+1 + ui,j−1 + ui−1,j + ui+1,j −4ui,j )The boundaries have to be updated separately using 8 different equations: 4 for each of the edges,and 4 for each corner. Here is the update formula for a cell on the top edge that is not on a corner:u′i,n−1 = ui,n−1 + k((ui,n−2 −ui,n−1) + (ui−1,n−1 −ui,n−1) + (ui+1,n−1 −ui,n−1))= ui,n−1 + k(ui,n−2 + ui−1,n−1 + ui+1,n−1 −3ui,n−1)Here is the update formula for a cell in the top left corner:u′0,n−1 = u0,n−1 + k((u0,n−2 −u0,n−1) + (u1,n−1 −u0,n−1))= u0,n−1 + k(u0,n−2 + u1,n−1 −2u0,n−1) Program:
A zero memory source has a source alphabet S = {s1, s2, s3}, with P = {1/4, 1/8, 5/8}. Find the entropy of the source H (S). Find the entropy of the second H (S2) extension and verify; then Find H(S4) and H(S11)?
The Virtual Weight (VW) of an integer number (which consists of more than 1 digit) is the sumof the individual digits that are composing the number. For example, consider the followingtwo numbers; 5638 and 1145, then the VW of each is calculated as following:VW(5638) = 5+6+3+8 = 22VW(1145) = 1+1+4+5 = 11Then, the VW can be classified as L (mean Low) or H (means High) using a specific cut-offvalue. For example, if the cut-off value is 15, then the VW of the number 5638 is H (High),and the VW of the number 1145 is L because 22 > 15 and 11 ≤ 15 respectivelyWrite a C++ program that: reads a positive integer n (where 5≤n≤20) from the user. If the user enters invalidnumber, then the program should continue prompting until he/she enters a valid numberwithin the specified range. Then, the program should generate n random numbers using the built-in rand()function. Every time a random number is generated, the program will classify that number as Lor H using the above method. Use a…
Suppose the economies of the world use a set of currencies C1, . . . , Cn; think of these as dollars, pounds, Bitcoin, etc. Your bank allows you to trade each currency Ci for any other currency Cj, and finds some way to charge you for this service. Suppose that for each ordered pair of currencies (Ci, Cj ), the bank charges a flat fee of fij > 0 dollars to exchange Ci for Cj (regardless of the quantity of currency being exchanged). Describe an algorithm which, given a starting currency Cs, a target currency Ct, and a list of fees fij for all i, j ∈ {1, . . . , n}, computes the cheapest way (that is, incurring the least in fees) to exchange all of our currency in Cs into currency Ct. Also, justify the its runtime. [A description or pseudocode (either is OK) of the algorithm, as well as a brief justification of its runtime.]
Suppose you’re consulting for a bank that’s concerned about fraud detection, and they come to youwith the following problem. They have a collection of n bank cards that they’ve confiscated, suspectingthem of being used in fraud. Each bank card is a small plastic object, containing a magnetic stripe withsome encrypted data, and it corresponds to a unique account in the bank. Each account can have manybank cards corresponding to it, and we’ll say that two bank cards are equivalent if they correspond to thesame account.It’s very difficult to read the account number off a bank card directly, but the bank has a high-tech “equivalence tester” that takes two bank cards and, after performing some computations, determines whether theyare equivalent.Their question is the following: among the collection of n cards, is there a set of more than n/2 of themthat are all equivalent to one another? Assume that the only feasible operations you can do with the cardsare to pick two of them and plug them…
(a) Using the correspondence1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27j k l n m s t u w x g h i o p q r v y z a b c d e f spacefind the numerical equivalent of the messageBUY ALL AVAILABLE STOCK AT MARKET.(b) Encode the message by postmultiplying the messagematrix M byA °1 1 01 0 11 1 1¢ .(c) Verify your work by decoding the encoded message inpart (b).
Show that x log x is O(x2) but that x2 is not O(x log x).