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This book presents tensors and differential geometry in a
comprehensive and approachable manner, providing a bridge from the
place where physics and engineering mathematics end, and the place
where tensor analysis begins. Among the topics examined are tensor
analysis, elementary differential geometry of moving surfaces, and
k-differential forms. The book includes numerous examples with
solutions and concrete calculations, which guide readers through
these complex topics step by step. Mindful of the practical needs
of engineers and physicists, book favors simplicity over a more
rigorous, formal approach. The book shows readers how to work with
tensors and differential geometry and how to apply them to modeling
the physical and engineering world. The authors provide
chapter-length treatment of topics at the intersection of advanced
mathematics, and physics and engineering: * General Basis and
Bra-Ket Notation * Tensor Analysis * Elementary Differential
Geometry * Differential Forms * Applications of Tensors and
Differential Geometry * Tensors and Bra-Ket Notation in Quantum
Mechanics The text reviews methods and applications in
computational fluid dynamics; continuum mechanics; electrodynamics
in special relativity; cosmology in the Minkowski four-dimensional
space time; and relativistic and non-relativistic quantum
mechanics. Tensor Analysis and Elementary Differential Geometry for
Physicists and Engineers benefits research scientists and
practicing engineers in a variety of fields, who use tensor
analysis and differential geometry in the context of applied
physics, and electrical and mechanical engineering. It will also
interest graduate students in applied physics and engineering.
Aero and Vibroacoustics of Automotive Turbochargers is a topic
involving aspects from the working fields of thermodynamics of
turbomachinery, aerodynamics, rotordynamics, and noise propagation
computation. In this broadly interdisciplinary subject,
thermodynamics of turbomachinery is used to design the turbocharger
and to determine its operating conditions. Aerodynamics is needed
to study the compressor flow dynamics and flow instabilities of
rotating stall and surge, which can produce growling and
whining-type noises. Rotordynamics is necessary to study rotor
unbalance and self-excited oil-whirl instabilities, which lead to
whistling and constant tone-type noises in rotating floating
oil-film type bearings. For the special case of turbochargers using
ball bearings, some high-order harmonic and wear noises also
manifest in the rotor operating range. Lastly, noise propagation
computation, based on Lighthill's analogy, is required to
investigate airborne noises produced by turbochargers in passenger
vehicles. The content of this book is intended for advanced
undergraduates, graduates in mechanical engineering, research
scientists and practicing engineers who want to better understand
the interactions between these working fields and the resulting
impact on the interesting topic of Aero and Vibroacoustics of
Automotive Turbochargers.
Rotordynamics of automotive turbochargers is dealt with in this
book encompassing the widely working field of small turbomachines
under real operating conditions at the very high rotor speeds up to
300000 rpm. The broadly interdisciplinary field of turbocharger
rotordynamics involves 1) Thermodynamics and Turbo-Matching of
Turbochargers 2) Dynamics of Turbomachinery 3) Stability Analysis
of Linear Rotordynamics with the Eigenvalue Theory 4) Stability
Analysis of Nonlinear Rotordynamics with the Bifurcation Theory 5)
Bearing Dynamics of the Oil Film using the Two-Phase Reynolds
Equation 6) Computation of Nonlinear Responses of a Turbocharger
Rotor 7) Aero and Vibroacoustics of Turbochargers 8) Shop and Trim
Balancing at Two Planes of the Rotor 9) Tribology of the Bearing
Surface Roughness 10) Design of Turbocharger Platforms using the
Similarity Laws The rotor response of an automotive turbocharger at
high rotor speeds is studied analytically, computationally, and
experimentally. Due to the nonlinear characteristics of the
oil-film bearings, some nonlinear responses of the rotor besides
the harmonic response 1X, such as oil whirl, oil whip, and
modulated frequencies occur in Waterfall diagram. Additionally, the
influences of the surface roughness and oil characteristics on the
rotor behavior, friction, and wear are discussed. This book is
written by an industrial R&D expert with many years of
experience in the automotive and turbocharger industries. The
all-in-one book of turbochargers is intended for scientific and
engineering researchers, practitioners working in the rotordynamics
field of automotive turbochargers, and graduate students in applied
physics and mechanical engineering.
This book comprehensively presents the computational design of
rolling bearings dealing with many interdisciplinary difficult
working fields. They encompass elastohydrodynamics (EHD), Hertzian
contact theory, oil-film thickness in elastohydrodynamic
lubrication (EHL), bearing dynamics, tribology of surface textures,
fatigue failure mechanisms, fatigue lifetimes of rolling bearings
and lubricating greases, Weibull distribution, rotor balancing, and
airborne noises (NVH) in the rolling bearings. Furthermore, the
readers are provided with hands-on essential formulas based on the
up-to-date DIN ISO norms and helpful examples for computational
design of rolling bearings. The topics are intended for
undergraduate and graduate students in mechanical and material
engineering, research scientists, and practicing engineers who want
to understand the interactions between these working fields and to
know how to design the rolling bearings for automotive industry and
many other industries.
This book documents the recent post-pandemic era business
innovation research in Vietnam bringing together selected works
from the 2022 ‘International Conference on Business Innovation:
Business Innovation in a Post-pandemic World’ held at RMIT
University in Vietnam. The book contributes to the body of
knowledge in several ways. It serves as a comprehensive reference
for business innovation research and promotes recent progress in
business innovation applications in Vietnam and offers a shared
understanding to help coordinate future research in the
field. Â
Advanced technologies have been transforming the ways we carry out
biological studies as well as deliver healthcare. While micro- and
nano-fabrication have provided miniaturized sensors and systems
with better sensitivity and selectivity,; innovations in flexible
electronics, biomaterials and telecommunications have helped in
enabling novel biomedical devices, reducing cost, bringing
convenience and establishing mobile-health (m-Health), and
personalized- and tele-medicine. Further, the recent rise of the
internet of things (IoTs) and machine learning-based approaches has
paved the avenue for those biomedical systems to become popular and
widely accepted by our society. In this context, we edit this book
aiming to cover a broad field of novel technologies used in
biological assessment and analysis for humans, animal models and in
vitro platforms, in both health monitoring and biological studies.
Technical topics discussed in the book include: Biosensing systems
and biomedical techniques Imaging techniques and systems Biosignal
analysis Animal models used in biological research
This monograph presents computational models that describe
electro-mechanical characteristics of tapered and cylinder roller
bearings in various industrial applications. Applying the
Levenberg-Marquardt's algorithm to solving strongly nonlinear
coupled equation systems, the computational models consisting of
many circular slices per rolling element enable computations of the
local Hertzian pressures at the elastohydrodynamic (EHD) contact
area, the relating oil-film thickness in elastohydrodynamic
lubrication (EHL), the limiting voltage of electro-pitting, bearing
frictions, and fatigue lifetimes of the bearings for various load
spectra. Using the best-known machine-learning method for
clustering, the load spectrum is clustered in k cluster means based
on the invariant damage number to accelerate the load spectrum.
Furthermore, the accelerated load spectrum is used for the testing
procedure of the bearings to reduce the testing time and costs as
well. The target audience of this book primarily comprises graduate
students in mechanical engineering and practicing engineers of
electro-machines and transmission systems who want to
computationally design tapered and cylinder roller bearings for the
automotive industry and other industries, and to deeply dive into
these relating working fields.
This book presents tensors and differential geometry in a
comprehensive and approachable manner, providing a bridge from the
place where physics and engineering mathematics end, and the place
where tensor analysis begins. Among the topics examined are tensor
analysis, elementary differential geometry of moving surfaces, and
k-differential forms. The book includes numerous examples with
solutions and concrete calculations, which guide readers through
these complex topics step by step. Mindful of the practical needs
of engineers and physicists, book favors simplicity over a more
rigorous, formal approach. The book shows readers how to work with
tensors and differential geometry and how to apply them to modeling
the physical and engineering world. The authors provide
chapter-length treatment of topics at the intersection of advanced
mathematics, and physics and engineering: * General Basis and
Bra-Ket Notation * Tensor Analysis * Elementary Differential
Geometry * Differential Forms * Applications of Tensors and
Differential Geometry * Tensors and Bra-Ket Notation in Quantum
Mechanics The text reviews methods and applications in
computational fluid dynamics; continuum mechanics; electrodynamics
in special relativity; cosmology in the Minkowski four-dimensional
space time; and relativistic and non-relativistic quantum
mechanics. Tensor Analysis and Elementary Differential Geometry for
Physicists and Engineers benefits research scientists and
practicing engineers in a variety of fields, who use tensor
analysis and differential geometry in the context of applied
physics, and electrical and mechanical engineering. It will also
interest graduate students in applied physics and engineering.
This book comprehensively presents the computational design of
rolling bearings dealing with many interdisciplinary difficult
working fields. They encompass elastohydrodynamics (EHD), Hertzian
contact theory, oil-film thickness in elastohydrodynamic
lubrication (EHL), bearing dynamics, tribology of surface textures,
fatigue failure mechanisms, fatigue lifetimes of rolling bearings
and lubricating greases, Weibull distribution, rotor balancing, and
airborne noises (NVH) in the rolling bearings. Furthermore, the
readers are provided with hands-on essential formulas based on the
up-to-date DIN ISO norms and helpful examples for computational
design of rolling bearings. The topics are intended for
undergraduate and graduate students in mechanical and material
engineering, research scientists, and practicing engineers who want
to understand the interactions between these working fields and to
know how to design the rolling bearings for automotive industry and
many other industries.
Held during algebraic topology special sessions at the Vietnam
Institute for Advanced Studies in Mathematics (VIASM, Hanoi), this
set of notes consists of expanded versions of three courses given
by G. Ginot, H.-W. Henn and G. Powell. They are all introductory
texts and can be used by PhD students and experts in the field.
Among the three contributions, two concern stable homotopy of
spheres: Henn focusses on the chromatic point of view, the Morava
K(n)-localization and the cohomology of the Morava stabilizer
groups. Powell's chapter is concerned with the derived functors of
the destabilization and iterated loop functors and provides a small
complex to compute them. Indications are given for the odd prime
case. Providing an introduction to some aspects of string and brane
topology, Ginot's contribution focusses on Hochschild homology and
its generalizations. It contains a number of new results and fills
a gap in the literature.
Rotordynamics of automotive turbochargers is dealt with in this
book encompassing the widely working field of small turbomachines
under real operating conditions at the very high rotor speeds up to
300000 rpm. The broadly interdisciplinary field of turbocharger
rotordynamics involves 1) Thermodynamics and Turbo-Matching of
Turbochargers 2) Dynamics of Turbomachinery 3) Stability Analysis
of Linear Rotordynamics with the Eigenvalue Theory 4) Stability
Analysis of Nonlinear Rotordynamics with the Bifurcation Theory 5)
Bearing Dynamics of the Oil Film using the Two-Phase Reynolds
Equation 6) Computation of Nonlinear Responses of a Turbocharger
Rotor 7) Aero and Vibroacoustics of Turbochargers 8) Shop and Trim
Balancing at Two Planes of the Rotor 9) Tribology of the Bearing
Surface Roughness 10) Design of Turbocharger Platforms using the
Similarity Laws The rotor response of an automotive turbocharger at
high rotor speeds is studied analytically, computationally, and
experimentally. Due to the nonlinear characteristics of the
oil-film bearings, some nonlinear responses of the rotor besides
the harmonic response 1X, such as oil whirl, oil whip, and
modulated frequencies occur in Waterfall diagram. Additionally, the
influences of the surface roughness and oil characteristics on the
rotor behavior, friction, and wear are discussed. This book is
written by an industrial R&D expert with many years of
experience in the automotive and turbocharger industries. The
all-in-one book of turbochargers is intended for scientific and
engineering researchers, practitioners working in the rotordynamics
field of automotive turbochargers, and graduate students in applied
physics and mechanical engineering.
Aero and Vibroacoustics of Automotive Turbochargers is a topic
involving aspects from the working fields of thermodynamics of
turbomachinery, aerodynamics, rotordynamics, and noise propagation
computation. In this broadly interdisciplinary subject,
thermodynamics of turbomachinery is used to design the turbocharger
and to determine its operating conditions. Aerodynamics is needed
to study the compressor flow dynamics and flow instabilities of
rotating stall and surge, which can produce growling and
whining-type noises. Rotordynamics is necessary to study rotor
unbalance and self-excited oil-whirl instabilities, which lead to
whistling and constant tone-type noises in rotating floating
oil-film type bearings. For the special case of turbochargers using
ball bearings, some high-order harmonic and wear noises also
manifest in the rotor operating range. Lastly, noise propagation
computation, based on Lighthill's analogy, is required to
investigate airborne noises produced by turbochargers in passenger
vehicles. The content of this book is intended for advanced
undergraduates, graduates in mechanical engineering, research
scientists and practicing engineers who want to better understand
the interactions between these working fields and the resulting
impact on the interesting topic of Aero and Vibroacoustics of
Automotive Turbochargers.
This book deals with rotordynamics of automotive turbochargers
while encompassing the analysis of the dynamics of rotating
machines at very high rotor speeds of 300,000 rpm and above. This
interdisciplinary field involves 1. thermodynamics and
turbo-matching knowledge to compute working conditions of
turbochargers, 2. fluid and bearing dynamics to calculate various
operating thrust loads and to design the rotating floating ring
bearings (two-oil-film bearings), and 3. tribology to improve the
rotor stability and to reduce the bearing friction. Mathematical
background in modeling and simulation methods is necessary;
however, the prerequisites have been kept to a minimum. The book
addresses both practitioners working in the field of rotordynamics
of automotive turbochargers and graduate students in mechanical
engineering.
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Context-Aware Systems and Applications - First International Conference, ICCASA 2012, Ho Chi Minh City, Vietnam, November 26-27, 2012, Revised Selected Papers (Paperback, 2013 ed.)
Phan Cong-Vinh, Nguyen Manh Hung, Nguyen Thanh Tung, Jun Suzuki
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R1,492
Discovery Miles 14 920
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Ships in 10 - 15 working days
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This book constitutes the thoroughly refereed proceedings of the
first International Conference on Context-Aware Systems and
Applications, ICCASA 2012, held in Ho Chi Minh City, Vietnam, in
November 2012. The 34 revised full papers presented were carefully
selected and reviewed from over 100 submissions. The papers cover a
wide spectrum of issues in the area of Context-Aware Systems (CAS).
CAS are going to shape networked computing systems of the future
Jay Forrester's Economic Dynamics was published in 1971 and The
Limits to Growth by Dennis Meadows and his associates appeared a
year later. The publication of those two books gave rise to twenty
years of intense research into the economics of exhaustible
resources, research which everywhere has had a substantial impact
both on public debate and on academic curricula. And now, just as
that line of research is losing steam, economists are focussing on
problems associated with the degradation of the natural
environment, problems which call for models which, in their formal
structure, are quite similar to those already developed in resource
economics. This is therefore an appropriate moment for the
appearance of a thorough exposition of the economics of exhaustible
resources. For that is what Nguyen Manh Hung and Nguyen Van Quyen
have provided. Their splendid new book covers equally well the
older Hotelling-inspired theory of cake-eating and the economics of
search and R&D designed to uncover new and cheaper sources of
supply. It provides an entree to the whole subject of resource
economics, as well as many new discoveries which will be of
interest to experienced researchers.
Signal Processing for Multistatic Radar Systems: Adaptive Waveform
Selection, Optimal Geometries and Pseudolinear Tracking Algorithms
addresses three important aspects of signal processing for
multistatic radar systems, including adaptive waveform selection,
optimal geometries and pseudolinear tracking algorithms. A key
theme of the book is performance optimization for multistatic
target tracking and localization via waveform adaptation, geometry
optimization and tracking algorithm design. Chapters contain
detailed mathematical derivations and algorithmic development that
are accompanied by simulation examples and associated MATLAB codes.
This book is an ideal resource for university researchers and
industry engineers in radar, radar signal processing and
communications engineering.
Speaking test topics chosen according to the test-takers' area of
expertise can be used to assess their speaking abilities to talk
about general background knowledge or their academic subject areas.
Recent studies have indicated that the topic choice affects testing
performance on the oral tests, but provided inclusive results
regarding the effect of general and specific-field topics on the
test takers' oral performance. The aim of this research study is to
investigate what type of oral assessment instruments and more
specifically what topics and tasks might be best for the purpose of
assessing Vietnamese faculty's oral English proficiency in the
academic workplace. The results showed no significant difference in
the faculty speaking performance on the general and academic
field-specific topics. The findings of the research have important
implications for assessing oral production in specific-purpose
language testing and for providing information about the needs of
Vietnamese faculty for training in spoken English for the academic
workplace.
This book provides extensions to mathematical techniques of
nonlinear optimization theory, as applies these techniques to
provide self-contained treatments for various versions of the
benchmark model of optimal economic growth. These models and
solving methods are normally based on the traditional concepts and
assumptions of nonlinear optimization, including optimality
conditions, local optimality, global optimality and convexity. As
an effort to contribute to the further development of the methods
for optimization and their applications in economics, this
monograph focuses on the necessary optimality conditions for
nonlinear programs and economic growth models in which some of its
basis assumptions are relaxed.
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