Consider a class MotorBoat that represents motorboats. A motorboat has attributes for • The capacity of the fuel tank • The amount of fuel in the tank • The maximum speed of the boat • The current speed of the boat • The efficiency of the boat’s motor • The distance traveled The class has methods to • Change the speed of the boat • Operate the boat for an amount of time at the current speed • Refuel the boat with some amount of fuel • Return the amount of fuel in the tank • Return the distance traveled so far If the boat has efficiency e, the amount of fuel used when traveling at a speed s for time t is e × s2 × t. The distance traveled in that time is s × t. a. Write a method heading for each method. b. Write preconditions and postconditions for each method. c. Write some Java statements that test the class. d. Implement the class.

Consider a class MotorBoat that represents motorboats. A motorboat has attributes for • The capacity of the fuel tank • The amount of fuel in the tank • The maximum speed of the boat • The current speed of the boat • The efficiency of the boat’s motor • The distance traveled The class has methods to • Change the speed of the boat • Operate the boat for an amount of time at the current speed • Refuel the boat with some amount of fuel • Return the amount of fuel in the tank • Return the distance traveled so far If the boat has efficiency e, the amount of fuel used when traveling at a speed s for time t is e × s2 × t. The distance traveled in that time is s × t. a. Write a method heading for each method. b. Write preconditions and postconditions for each method. c. Write some Java statements that test the class. d. Implement the class.

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section: Chapter Questions

Problem 17RP

See similar textbooks

Similar questions

A computer game is a computer-controlled game where players interact with objects displayed on a screen for the sake of entertainment. If we want to play games on the computer, suggest ONE (1) suitable input device and ONE (1) suitable output device, include the usage explanation for each device.
A company has several employees, all with different names, who perform interviews with job applicants (one applicant is interviewed by one employee). The job applicants also have different names. The interviewer makes appointments for interviews with the applicants. Each applicant may be interviewed at several occasions, possibly by different interviewers, but in that case the interviews take place during different days. The company has special interview rooms. Each interviewer uses the same room for all interviews during a day. A room may, however, be used by different interviewers during a day, as long as the interviews don't collide in time. The reservation of interview appointments is to be computerized. The database devel- oper has decided to use a single relation for all data, with the following schema: Interviews(interviewer, applicant, day, time, room) a) From the text, find functional dependencies in the relation. b) Find the keys of the relation. c) Show that the relation is…
In a private university, students can enrol for at least 1 to a maximum of 5 subjects in a semester. Subjects that are to be offered in that particular semester will be assigned to a class. One class should have at least 5 students and up to a maximum of 40 students. Multiple classes for a subject can be created if the students number enrolled for the subject is large. A subject might not be offered on that semester depending on the needs. A lecturer can be assigned to zero and up to a maximum of 4 classes on that particular semester. Draw the class diagram to represent the above scenario. Each entity should have at least 1 attribute as its identity. Provide the relevant associations between these entities and include the multiplicities.
draw er diagram for drivers (identified by driver number name and address) take out vehicles to make deliveries. A vehicle (identifies by vehicle number, make and model. It is possible for a vehicle to be taken out more than once on a given day. Every time a driver takes out a vehicle incurs expenses of allowed types (e.g fuel cost, meals). Each expenses has a code number, name, and amount each time an expense is incurred.
Assignment As an initiation into the study of ethics, carefully read each of the following scenarios. After reflection, come up with your own answer to each of the questions. Scenario 1 Alexis, a gifted high school student, wants to become a doctor. Because she comes from a poor family, she will need a scholarship in order to attend college. Some of her classes require students to do extra research projects in order to get an A. Her high school has a few older PCs, but there are always long lines of students waiting to use them during the school day. After school, she usually works at a part-time job to help support her family. One evening Alexis visits the library of a private college a few miles from her family's apartment, and she finds plenty of unused PCs connected to the Internet. She surreptitiously looks over the shoulder of another student to learn a valid login/password combination. Alexis returns to the library several times a week, and by using its PCs and printers she…
A medical Centre can have many doctors. A doctor can be scheduled for many appointments but may not have any scheduled appointment at all. A patient can schedule request for one or more appointments. However, every appointment is about only one patient. As a result of every appointment, there must be a bill. One payment is applied to exactly 1 bill, and 1 bill can be paid off over time by several payments. A bill can be outstanding, having nothing yet paid on it at all. One patient can make many payments, but a single payment is made by only 1 patient. Some patients are insured by an insurance company. If they are insured, they can only carry insurance with one company. An insurance company can have many patients carry their policies. For patients that carry insurance, the insurance company will make payments, each single payment is made by exactly 1 insurance company. (Hint: final ERD must include 7 tables.) a) Identify the entities with attributes and keys (primary and foreign keys).…
Draw the class diagram for IU library. An IU library has books, journals, and newspaper. These are the library items. All library material has an id_number and a title. Among all the materials, only books can be loaned to the IU students and staffs. Staff can borrow journals for their research. When a user’s (staff and students) borrows books, the librarian must scanned the card of IU users and record the borrower’s ID, loan date and return date. For users, the library maintains their name, ID and phone number. Each user has library card. Draw a class diagram for the description above. Make sure to show attributes, multiplicities and relationship, where appropriate.
A typical lending library keeps a stock of books for the use of its members. Each member can take out a number of books, up to a certain limit. After a given period, the library expects members to return the books to the librarian that they have on loan. When borrowing books, members are expected to hand their chosen books to the librarian, who records each new loan before issuing the books to the member. Librarians can also reserve books on behalf of members. In the proposed new software system, anyone should be able to browse the stock of books held in the library, but only a member will be able to reserve a book. The ability to browse catalogs and make reservations will be provided through a web-browser interface. The catalog is updated by the librarian. The system should also deal with the enrolment of new members for the library which is done by the librarian. Draw a simple use case diagram for the proposed software system,
SCENARIO A manufacturing company produce equipment and sell them. The company needs a system to manage stock operations. It is explained below. Equipments are manufactured by using parts. Name, manufacturing date, current status of manufacturing must be known. Some of the equipments must be tested. We want to define all parts with their name, description and type. Only the defined parts can be bought. Once parts are bought, they are located into shelves in warehouses. Each physical part uniquely identified with number. We want to know when each part is bought. Each bought part may have different warranty period. We have to use the bought part in manufacturing by taking this into account. Warehouses are located in different part of the company. Size, type of the warehouses may be different. Equipments are manufactured for customers. It is needed to know the equipments of customers. Some of the customers pay the transportation cost. Name, address, tax number type of the customer will…
In a university there are different classrooms, offices and departments. A department has a name and it contains many offices. A person working at the university has a unique ID and can be a professor or an employee. "A professor can be a full, associate or assistant professor and he/she is enrolled in one department. •Offices and classrooms have a number ID, and a classroom has a number of seats. • Every employee works in an office. 1. Draw the class diagram for the scenario above
This question is related to System Models. A navigation system is to be developed to help the delivery riders to deliver food to their customers. You are asked to design the UML Class Diagram for the system based on the following: A navigation device belongs to only one rider's vehicle. A navigation device can calculate at least zero route. In return, every route can be calculated by many navigation devices. A route has at least one road segment, and every road segment belongs to many routes. A road segment is defined by road name as well as start and end points. "Navigation device with congestion avoiding" is a specialization of the navigation device, and it queries many traffic jam information. Your diagram must include any related relationships i.e. generalization, aggregation and/or composition and multiplicity.
Computer Science Investing in stocks is a way to create assets that are supposed to provide financial security over time. In solving this problem, we assume that an investor buys several shares of stock at a certain price. These shares are going to be sold later on for a different price. Obviously, if the selling price is higher than the acquisition price, the investor makes a profit, registering capital gain. If the shares are sold at a lower price, the investor has a loss, which marks a negative capital gain. This whole process is done over a period of time, and you are required to create a scenario for buying and selling shares. The assumption is that the investor sells shares in the order in which they were purchased. The goal is to calculate the capital gain over time. Suppose that you buy n shares of stock or mutual fund for d dollars each. Later, you sell some of these shares. If the sale price exceeds the purchase price, you have made a profit—a capital gain. On the other…