EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 8220100254147
Author: Chapra
Publisher: MCG
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Chapter 1, Problem 17P
A fluid is pumped into the network shown in Fig. P1.17. If
FIGURE P1.17
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Tri-County Utilities, Inc., supplies natural gas to customers in a three-county area. The company purchases natural gas from two companies: Southern Gas and Northwest Gas.
Demand forecasts for the coming winter season are as follows: Hamilton County, 400 units; Butler County, 200 units; and Clermont County, 300 units. Contracts to provide the following quantities have been written: Southern Gas, 500 units; and Northwest Gas, 400 units. Distribution costs for the counties vary, depending upon the location of the suppliers. The distribution costs per unit (in thousands of dollars)
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As discussed in Section 8.3, the Markowitz model uses the variance of the portfolio as the measure of risk. However, variance includes deviations both below and above the mean return. Semivariance includes only deviations below the mean and is considered by many to be a better measure of risk.
(a)
Develop a model that minimizes semivariance for the Hauck Financial data given in the file HauckData with a required return of 10%.
Assume
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ds ≥ R − Rs
with
ds ≥ 0.
Then make the objective function:
Min
1
5
5
s = 1
ds2.
Let
FS = proportion of portfolio invested in the foreign stock mutual fund
IB = proportion of portfolio invested in the intermediate-term bond fund
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Chapter 1 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 1 - Use calculus to solve Eq. (1.9) for the case where...Ch. 1 - 1.2 Repeat Example 1.2. Compute the velocity to ...Ch. 1 - Rather than the linear relationship of Eq. (1.7),...Ch. 1 - For the free-falling parachutist with linear drag,...Ch. 1 - Compute the velocity of a free-falling parachutist...Ch. 1 - 1.6 The following information is available for a...Ch. 1 - The amount of a uniformly distributed radioactive...Ch. 1 - A group of 35 students attend a class in a room...Ch. 1 - A storage tank contains a liquid at depth y, where...Ch. 1 - For the same storage tank described in Prob. 1.9,...
Ch. 1 - 1.11 Apply the conservation of volume (see Prob....Ch. 1 - In our example of the free-falling parachutist,...Ch. 1 - 1.13 Suppose that a spherical droplet of liquid...Ch. 1 - Newtons law of cooling says that the temperature...Ch. 1 - As depicted in Fig. P1.15, an RLC circuit consists...Ch. 1 - 1.16 Cancer cells grow exponentially with a...Ch. 1 - 1.17 A fluid is pumped into the network shown in...Ch. 1 - The velocity is equal to the rate of change of...Ch. 1 - You are working as a crime-scene investigator and...Ch. 1 - 1.21 As noted in Prob. 1.3, drag is more...Ch. 1 - 1.22 As depicted in Fig. P1.22, a spherical...Ch. 1 - As described in Prob. 1.22, in addition to the...Ch. 1 - As depicted in Fig. P1.24, the downward deflection...Ch. 1 - 1.25 Use Archimedes’ principle to develop a...Ch. 1 - Beyond fluids, Archimedes principle has proven...
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