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This book provides electrical and electronic engineering
undergraduate and graduate students and trainees with practical
information on grounding-system parameters, and on different
methods for measuring soil resistivity and ground resistance. It
also presents some real-world studies, which enhance the learning
experience. It discusses electromagnetic field theories to explain
ground resistance modeling using different sizes of electrodes.
Furthermore it includes CYME GRD software for simulation of soil
resistivity and grounding grid design, and considers some
fundamental concepts of power systems to clarify other topics
related to the grounding system.
This book is designed as an introductory course for undergraduate
students, in Electrical and Electronic, Mechanical, Mechatronics,
Chemical and Petroleum engineering, who need fundamental knowledge
of electrical circuits. Worked out examples have been presented
after discussing each theory. Practice problems have also been
included to enrich the learning experience of the students and
professionals. PSpice and Multisim software packages have been
included for simulation of different electrical circuit parameters.
A number of exercise problems have been included in the book to aid
faculty members.
A four year Electrical and Electronic engineering curriculum
normally contains two modules of electromagnetic field theories
during the first two years. However, some curricula do not have
enough slots to accommodate the two modules. This book,
Electromagnetic Field Theories, is designed for Electrical and
Electronic engineering undergraduate students to provide
fundamental knowledge of electromagnetic fields and waves in a
structured manner. A comprehensive fundamental knowledge of
electric and magnetic fields is required to understand the working
principles of generators, motors and transformers. This knowledge
is also necessary to analyze transmission lines, substations,
insulator flashover mechanism, transient phenomena, etc. Recently,
academics and researches are working for sending electrical power
to a remote area by designing a suitable antenna. In this case, the
knowledge of electromagnetic fields is considered as important
tool.
This book provides electrical and electronic engineering
undergraduate and graduate students and trainees with practical
information on grounding-system parameters, and on different
methods for measuring soil resistivity and ground resistance. It
also presents some real-world studies, which enhance the learning
experience. It discusses electromagnetic field theories to explain
ground resistance modeling using different sizes of electrodes.
Furthermore it includes CYME GRD software for simulation of soil
resistivity and grounding grid design, and considers some
fundamental concepts of power systems to clarify other topics
related to the grounding system.
A four year Electrical and Electronic engineering curriculum
normally contains two modules of electromagnetic field theories
during the first two years. However, some curricula do not have
enough slots to accommodate the two modules. This book,
Electromagnetic Field Theories, is designed for Electrical and
Electronic engineering undergraduate students to provide
fundamental knowledge of electromagnetic fields and waves in a
structured manner. A comprehensive fundamental knowledge of
electric and magnetic fields is required to understand the working
principles of generators, motors and transformers. This knowledge
is also necessary to analyze transmission lines, substations,
insulator flashover mechanism, transient phenomena, etc. Recently,
academics and researches are working for sending electrical power
to a remote area by designing a suitable antenna. In this case, the
knowledge of electromagnetic fields is considered as important
tool.
This book covers the basics of DC circuits, AC circuits,
three-phase power to understand the basics and controls of
electro-hydraulics and electro-pneumatics. This book covers
detailed knowledge on the fluid power properties, Bernoulli’s
equation, Torricelli’s theorem, viscosity, viscosity index,
hydraulic pumps, hydraulic valves, hydraulic motors, pressure
control valves, pneumatic systems, pneumatic cylinders, different
types of gas laws, valve actuation, relay, magnetic contactor,
different types of switches, logic gates, electro-pneumatic control
circuits with different options and introduction to PLC. In
addition, the detailed technique of Automation Studio software,
different types of simulation circuits with hydraulics, pneumatics
and electro-pneumatic are included. This book will be an excellent
textbook for electromechanical, robotics, mechatronics, electrical
control and mechanical students as well as for the professional who
practices fluid power systems.
This book covers the basics of DC circuits, AC circuits,
three-phase power to understand the basics and controls of
electro-hydraulics and electro-pneumatics. This book covers
detailed knowledge on the fluid power properties, Bernoulli's
equation, Torricelli's theorem, viscosity, viscosity index,
hydraulic pumps, hydraulic valves, hydraulic motors, pressure
control valves, pneumatic systems, pneumatic cylinders, different
types of gas laws, valve actuation, relay, magnetic contactor,
different types of switches, logic gates, electro-pneumatic control
circuits with different options and introduction to PLC. In
addition, the detailed technique of Automation Studio software,
different types of simulation circuits with hydraulics, pneumatics
and electro-pneumatic are included. This book will be an excellent
textbook for electromechanical, robotics, mechatronics, electrical
control and mechanical students as well as for the professional who
practices fluid power systems.
This book covers the topic from introductory to advanced levels for
undergraduate students of Electrical Power and related fields, and
for professionals who need a fundamental grasp of power systems
engineering. The book also analyses and simulates selected power
circuits using appropriate software, and includes a wealth of
worked-out examples and practice problems to enrich readers'
learning experience. In addition, the exercise problems provided
can be used in teaching courses.
Bangladesh is one of the richest countries of the world considering
the availability of fisheries resources but annual fish production
is still less than the demand of country people. Bangladesh earns
second highest foreign currency from fisheries sector by exporting
fisheries products. Fisheries are playing an important role in the
development of Bangladesh and through better management this
contribution can be increased much. Huge employment opportunities
have been developed based of fisheries in Bangladesh. Food security
must be established in Bangladesh by scientific using of all types
of resources. We need to use our resources more efficiently in an
eco-friendly way so that enough production can be obtained to meet
up the country demand. The multiple use of water from ponds needs
to be well understood in order that it can be optimally used to
produce farm products and meet domestic needs. Fish farming is a
profitable and attractive commercial enterprise. This agribusiness
study is an endeavor to study the fish farms which includes all
activities from input collection to marketing of fish in
Bangladesh.
This book has been written based on PhD thesis. In this book, most
fundamental dimensional analysis technique is used to develop some
mathematical relationships to understand the flashover mechanism of
contaminated insulator. The expression of time to flashover,
flashover voltage in terms of ESDD and surface conductivity has
been developed. In addition, the relationships between leakage
resistance and ESDD, and ESDD and wind velocity have been
developed. All mathematical models have been verified by the
experiments.
During the last decades, a vertical exploration of statistical
methodology in the ground of longitudinal data has been observed.
One of the most exciting developments in this area is the
Generalized Estimating Equation (GEE). This is a widely used
approach that does not require the complete specification of the
joint distribution of repeated measurements. In addition, GEE takes
into account which results in attaining more efficiency in
estimating parameters of marginal models. The model used in this
study was developed by Barnhart & Williamson (1998). To test
the goodness-of-fit we have applied model based and empirically
corrected tests according to their implication. In their suggested
GEE approach the correlation between two responses was not
considered. Here an alternative procedure is proposed based on GEE
where the correlation between two responses was considered. This
study has also indicated that the model with only main effects did
not fit the data well. There is a significant region, time and
interaction effect. The identity correlation structure provides
most efficient estimates to represent the relationship among the
covariates and the responses.
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