PROBLEM SET I
2-16. An order for a computer system can specify memory of 4, 8, or 12
gigabytes, and disk storage of 200, 300, or 400 gigabytes. Describe the set of
PROBLEM SET 2
For each of the following exercises, determine the range (possible values) of the
3-2. In a voice communication system with 50 lines, the ran- dom variable is the
number of lines in use at a particular
ES 303 STATISTICAL METHODS FOR ENGINEERS
(You should hand in your homework to the assistant before the exam starts)
Name Surname:. Student No.: .Section.
IMPORTANT: You should have the printout the homework. Write down each answer of the
CHAPTER 4 Continuous Random Variables and
Probability Distributions 107
4-1 Continuous Random Variables 108
4-2 Probability Distributions and Probability Density
4-3 Cumulative Distribution Functions 111
4-4 Mean and Variance of a Continuous
PROBLEM SET 3
EXAMPLE 4-13 Normally Distributed Current
Suppose the current measurements in a strip of wire are assumed to follow a normal distribution
with a mean of 10 milliamperes and a variance of 4 (milliamperes)2.
What is the probability that
ChainA Vital Subject
The supply chain is simply another way of
saying the whole process of business.
CR (2004) Prentice Hall, Inc.
Logistics and supply chain management
Evolution of l
Strategy and Planning
If you dont know where you want to go, any
path will do.
CR (2004) Prentice Hall, Inc.
Logistics objectives and strategy
Decision levels in logistics planning
ENVE 309 FUNDAMENTALS OF BIOLOGICAL TREATMENT
2007 Fall Semester, Recitation VIII
1. Design an optimum activated sludge process of combined nitrifying type for a wastewater
flow of 20 MLD. Wastewater contains 300 mg/L BOD and 30 mg/L N. The pH remains
TERM PAPER SUBJECTS
Biological nitrogen removal from domestic wastewater
Biological phosphorus removal from domestic wastewater
Minimization of excess sludge production for biological wastewater treatment
Aerobic MBRs for domestic wastewater trea
1. The following experimental protocol was obtained with a laboratory scale chemostat of 2 L
volume. The influent strength was 650 mg/L as COD.
COD Biomass (mg/L)
CE 428 Water and Wastewater Design
Stoichiometry of Biological Nitrification
Two step oxidation of ammonia to nitrite and to nitrate
2 NH4+ + 3O2 = > 2NO2- + 4H+ + 2H2O
2 NO2- + O2 = >
Design an SBR to treat wastewater having influent flowrate of 2000 m3/d. 80 % of reactor volume is
decanted at each cycle and number of cycles per day is 2.
a) One-tank system: X, xE, VF, VT, Vo=?
b) Two-tank system : X, xE, VFn, VTn, Von, TF,
Q: Design a 2-tank SBR with 3 cycles per day for a wastewater flow rate of 0.1 MLD.
Take initial volume (V0) as 25 % of total, then you can adjust as required by observing sludge
The following design criteria are applicable:
Ts = 2 h (s
Design an anaerobic filter for a brewery wastewater of 1 MLD flow rate and having an
average COD of around 22000 mg/l. Take that design criteria is 10 kg COD/m3.d for such a
system which should contain around 30 g/l VSS. Also consider that effluent ste