outputonly dynamic testing of bridges and special structures
Dynamic performance of bridges and vehicles under strong wind
Ngày tải lên :
16/06/2014, 09:30
... pair of K and
ω so that the determinant of the
characteristic function of the equations of motion becomes zero (Simiu and Scanlan 1996).
For both buffeting and flutter analyses, one of the ... encouragement and support.
Thanks are also extended to my other committee members: Professor Dimitris E.
Nikitopoulos of Mechanical Engineering, Professor Jannette Frandsen of Civil Engineering, and ... above the h and
α represents a derivative with respect to time, m and I =
generalized mass and generalized mass moment of inertia of a unit length of deck,
respectively; ζ
α
and ζ
h
= structural...
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PHÂN TÍCH CHƯƠNG TRÌNH MÔ PHỎNG MỘTCHIỀU AMPS – 1D (Analysis of Microelectronic and Photonic Structures)
Ngày tải lên :
18/03/2013, 13:40
... axeptor (cm
2
)
38
2 CHƯƠNG 2
CHƯƠNG TRÌNH MÔ PHỎNG MỘTCHIỀU AMPS – 1D
(Analysis of Microelectronic and Photonic Structures)
Chương trình mô phỏng một chiều AMPS – 1D là một chương trình đa năng ... nhiệt độ thấp 14
2 CHƯƠNG 2
CHƯƠNG TRÌNH MÔ PHỎNG MỘTCHIỀU AMPS – 1D
(Analysis of Microelectronic and Photonic Structures) 15
2.1 Phương trình Poisson 15
2.1.1 Nồng độ điện tử tự do và nồng độ...
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Tài liệu Fundamentals of OOP and Data Structures in Java Richard Wiene ppt
Ngày tải lên :
14/02/2014, 04:20
... of OOP and Data Structures in Java
Richard Wiener
University of Colorado, Colorado Springs
Lewis J. Pinson
University of Colorado, Colorado Springs
Page i
Fundamentals of OOP and Data Structures ... principles of OOP and GUI programming, this book takes the unique path of presenting the
fundamental issues of data structures within the context of paradigms that are essential to today's professional ... knowledge of OOP, GUI programming and classical data structures. The authors assume the reader has only an
elementary understanding of Java and no experience with OOP.
Richard Wiener is Associate Professor...
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Tài liệu Đề tài " Moduli spaces of surfaces and real structures " doc
Ngày tải lên :
14/02/2014, 16:20
... form is even: then S is a connected sum
of copies of P
1
C
× P
1
C
and of a K3 surface if the signature is negative,
and of copies of P
1
C
× P
1
C
and of a K3 surface with reversed orientation
if ... k
2
n
2
(k
2
,k
3
≥ 0).
Annals of Mathematics
Moduli spaces
of surfaces and real structures
By Fabrizio Catanese*
MODULI SPACES OF SURFACES AND REAL STRUCTURES 589
By the formula of Riemann Hurwitz ... C
with an action of G, and the product
action of G on C × C
is free if and only if, defining c, c
by the properties
abc = a
b
c
=1 ,and letting Σ be the union of the conjugates of the cyclic
subgroups...
- 17
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- 0
Tài liệu Báo cáo khoa học: "STRING-TREE CORRESPONDENCE GRAMMAR: A DECLARATIVE GRAMMAR FORMALISM FOR DEFINING THE CORRESPONDENCE BETWEEN STRINGS OF TERMS AND TREE STRUCTURES" pdf
Ngày tải lên :
22/02/2014, 10:20
... between elements of the set of substrings
of the string and elements of the set of subtrees
of the tree : such a relation is called a string-
tree correspondence. An example of a string-tree ... a declarative grammar
formalism for the task of establishing the relation
between on one hand a set of strings of terms and
on the other a set of structural representations -
a structural ... motivated,
and hence its substructures may not correspond pro-
jectively to the substrings of the related sentence
The characteristic of the linguistic approach is
the design of the multilevel structures, ...
- 7
- 444
- 0
Ecotoxicological Testing of Marine and Freshwater Ecosystems Emerging Techniques, Trends, and Strategies pot
Ngày tải lên :
06/03/2014, 18:21
... understand and compre-
hend the strengths and limitations of various techniques and providing
access to additional literature. An overview and synthesis of the current
status of techniques and strategies ... Overview of methods for processing and integration of data, risk
communication, and risk perception
• Use of information from biological testing in decision- and policy-
making
• Selected and simple ... and its response to
disturbances. The book as a whole promotes the understanding of the struc-
ture, function, and performance of healthy and damaged aquatic ecosystems
(freshwater, marine, and...
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Strength of Ships and Ocean Structures docx
Ngày tải lên :
24/03/2014, 01:20
... Decomposition of a stress time history of an ocean-going bulk carrier.
STRENGTH OF SHIPS AND OCEAN STRUCTURES 19
sections) of the wave elevation at two instants of time t
1
and t
2
.
Ensemble averages of ... Stability
Professor Alaa Mansour and Dr. Donald Liu Strength of Ships and Ocean Structures
Dr. Lars Larson and Dr. Hoyte Raven Resistance
Professors Justin E. Kerwin and Jacques B. Hadler Propulsion
Professor ... Condi-
tions of equality of deflections and equilibrium of inter-
nal and external forces are then required to be satisfied
at the points of intersection, leading to the formulation
of a system of simultaneous...
- 250
- 4.3K
- 3
Micromachining Techniques for Fabrication of Micro and Nano Structures Part 1 ppt
Ngày tải lên :
21/06/2014, 02:20
...
Photoresist is exposed to a set of lights through a mask often made of quartz. Wavelength of
light ranges from 300-500 nm (UV) and X-rays (wavelengths 4-50 Angstroms). Two types of
photoresist are used: ... use of masking and
process chemicals, and demonstrates sub-micrometer resolution. FIB etching equipments
have shown potential for a variety of new applications, in the area of imaging and precision ... not capable of making true 3D structures e.g. free form
surfaces and also limited in range of materials. Mechanical machining is capable of making
free form surfaces in wide range of materials....
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- 0
Micromachining Techniques for Fabrication of Micro and Nano Structures Part 3 doc
Ngày tải lên :
21/06/2014, 02:20
... of 10 kHz and 3.0 W at repetition
rate of 20 kHz, and that of the 266 nm laser was 0.5 W at repetition rate of 5 kHz. The stage
was moved up and down to adjust the z-axis to focus and de-focus ...
Microfluidics falls into an intermediate range within the spectrum of applications for
microfabrication techniques. The width and depth of most microfluidic channels fall in the
range of 10-1000 ... the surface, and the process will be photochemical in
3
Fundamentals of Laser Ablation
of the Materials Used in Microfluiducs
Tai-Chang Chen and Robert Bruce Darling
University of Washington,...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 4 pot
Ngày tải lên :
21/06/2014, 02:20
... construction of microfluidic cartridges from a series of laser-cut
plastic laminates which are aligned and bonded together. This method of fabrication offers
enormous flexibility in both the design of ... electrical and magnetic components of the electromagnetic fields. Much of the
work in MTM has been focused on the real parts of permittivity and permeability to enable
the creation of a negative ... type of machining as a result of their much lower cost and ease of use as
compared to UV laser systems.
6. Conclusion
This chapter discusses the fundamentals of laser ablation in the microfabrication...
- 20
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 6 docx
Ngày tải lên :
21/06/2014, 02:20
...
Fig. 14. SEM images of trenches laser micromachined at different focus offset planes: (a)
small offset of 300 μm; (b) optimal offset of 450 μm; (c) large offset of 600 μm. The pulse
energy, ... expanded and collimated beam was guided by several laser mirrors and
focused onto a piece of GaN-on-sapphire sample (emission wavelength = 470 nm, thickness
of GaN = 3 μm and thickness of sapphire ... air.
Fig. 20. AFM scans of trenches generated in: (a) and (c) air; (b) and (d) DI water. (c) and (d)
are the zoomed-in images of the bottom surfaces. The focus offset, pulse energy, pulse...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 7 docx
Ngày tải lên :
21/06/2014, 02:20
... Gaussian beam profile, (b) overlapping of Gaussian
profile to generate ‘top-hat’, and (c) 'Top-hat' beam profile.
Micromachining Techniques for Fabrication of Micro and Nano Structures ... cost and speed of excimer laser could be an issue
from the production point of view at this stage of the deployment, other lasers such as UV
Nd:YAG and CO
2
can offer both prototyping and mass ... the diameter
and observe the profile. This is an indicative method especially when the process is thermal.
Alternatively, beam profile and homogeneity is monitored using a beam profiler which...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 9 docx
Ngày tải lên :
21/06/2014, 02:20
...
164
number of advantages like reduced costs due to handling of smaller amounts of liquid, less
storage and disposal costs, no hygienic problems due to bacterial contamination and less
cleaning ... effort for liquid and the work piece. On the other hand, the right dosing of the oil in
the air stream is essential especially in the case of micromachining to prevent the sticking of
chips to the ... transferred to
Micromachining Techniques for Fabrication of Micro and Nano Structures
168
Fig. 14. Faults of adhesion and uniformity of coatings.
It is obvious that the price for micro tools...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 10 docx
Ngày tải lên :
21/06/2014, 02:20
... temperature and concentration of the reactive.
In particular, the study presented here was made with a concentration of 10% of TMAH and
90% of deionized water at 80°C, from which an etch rate of approximately ... Hitachi with lengths of 1, 2 and 3 mm and
a diameter of 0.4 mm. For the first two tools, 36.000 rpm and a feed rate of 1800 mm/min
were applied. The infeeds were 0.03 and 0.021 mm, respectively. ... cutting of the
micro end mill at the perimeter of the pin caused by machining strategy and low tool
stiffness.
4.3 Machine issues
4.3.1 Thermal effects
Especially for large numbers of microstructures,...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 11 pot
Ngày tải lên :
21/06/2014, 02:20
...
practical and rather loose definition of meso- and micro-scale for features between 100 μm and 250 µm
and less than and equal to 100 μm, respectively.
5
Supported by OMAX’s R&D funds and NSF ... Techniques for Fabrication of Micro and Nano Structures
208
One of the major improvements in recent years is the development of direct-drive pumps to
replace the inefficient and bulky intensifier, ... understanding the physics of the
supersonic/subsonic three-phase microfluidics of the abrasive slurry moving through small-
diameter mixing tubes and on issues related to the flow characteristics of...
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