outputonly dynamic testing of bridges and special structures
Dynamic performance of bridges and vehicles under strong wind
Công trình giao thông, thủy lợi
... 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; ζα and ζh = structural...
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PHÂN TÍCH CHƯƠNG TRÌNH MÔ PHỎNG MỘTCHIỀU AMPS – 1D (Analysis of Microelectronic and Photonic Structures)
... axeptor (cm2) 382 CHƯƠNG 2CHƯƠNG 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 142 CHƯƠNG 2CHƯƠNG TRÌNH MÔ PHỎNG MỘTCHIỀU AMPS – 1D(Analysis of Microelectronic and Photonic Structures) 152.1 Phương trình Poisson 152.1.1 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
... of OOP and Data Structures in JavaRichard WienerUniversity of Colorado, Colorado SpringsLewis J. PinsonUniversity of Colorado, Colorado Springs Page iFundamentals 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
... form is even: then S is a connected sum of copies of P1C× P1C and of a K3 surface if the signature is negative, and of copies of P1C× P1C and of a K3 surface with reversed orientationif ... k2n2(k2,k3≥ 0).Annals of Mathematics Moduli spaces of surfaces and real structures By Fabrizio Catanese* MODULI SPACES OF SURFACES AND REAL STRUCTURES 589By the formula of Riemann Hurwitz ... Cwith an action of G, and the productaction of G on C × Cis free if and only if, defining c, cby the propertiesabc = abc=1 ,and letting Σ be the union of the conjugates of the cyclicsubgroups...
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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
... 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, ...
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Ecotoxicological Testing of Marine and Freshwater Ecosystems Emerging Techniques, Trends, and Strategies pot
... understand and compre-hend the strengths and limitations of various techniques and providingaccess to additional literature. An overview and synthesis of the currentstatus of techniques and strategies ... Overview of methods for processing and integration of data, riskcommunication, and risk perception• Use of information from biological testing in decision- and policy-making• Selected and simple ... and its response todisturbances. 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
... Decomposition of a stress time history of an ocean-going bulk carrier.STRENGTH OF SHIPS AND OCEAN STRUCTURES 19sections) of the wave elevation at two instants of time t1 and t2.Ensemble averages of ... StabilityProfessor Alaa Mansour and Dr. Donald Liu Strength of Ships and Ocean Structures Dr. Lars Larson and Dr. Hoyte Raven ResistanceProfessors Justin E. Kerwin and Jacques B. Hadler PropulsionProfessor ... Condi-tions of equality of deflections and equilibrium of inter-nal and external forces are then required to be satisfiedat the points of intersection, leading to the formulation of a system of simultaneous...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 1 ppt
... 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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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 3 doc
... 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
... 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...
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Micromachining Techniques for Fabrication of Micro and Nano Structures Part 6 docx
... 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
... 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 CO2 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
... 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
... 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
... 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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