Xem 1-20 trên 24 kết quả Displacement methods
  • In modern engineering, as a basis of construction, arches have a diverse range of applications. Today the theory of arches has reached a level that is suitable for most engineering applications. Many methods pertaining to arch analysis can be found in scientific literature. However, most of this material is published in highly specialized journals, obscure manuals, and inaccessible books. This is not surprising, as the intensive development of arch theory, particularly stability and vibration have mostly occurred in the 1940s to the 1960s.

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  • The foundations of this book lie in the highly successful text Principles of Measurement and Instrumentation by the same author. The first edition of this was published in 1988, and a second, revised and extended edition appeared in 1993. Since that time, a number of new developments have occurred in the field of measurement. In particular, there have been significant advances in smart sensors, intelligent instruments, microsensors, digital signal processing, digital recorders, digital fieldbuses and new methods of signal transmission.

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  • This book pilots the reader into the future. The first three chapters introduce new materials and material processing methods. Then five chapters present innovative new design directions and solutions. The main section of the book contains ten chapters organized around problems and methods of manufacturing and technology, from cutting process optimisation through maintenance and control to the Digital Factory. The last two chapters deal with information and energy, as the foundations of a prospering economy....

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  • Soils are aggregates of mineral particles, and together with air and/or water in the void spaces, they form three-phase systems. A large portion of the earth’s surface is covered by soils, and they are widely used as construction and foundation materials. Soil mechanics is the branch of engineering that deals with the engineering properties of soils and their behavior under stress.

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  • We know the interventions that can save most women’s lives. If every woman had access to essential maternal care, 74% of maternal deaths could be prevented4. If all women had access to self–controlled means of HIV/ AIDS protection and were in a position within society to use these methods, millions of HIV/AIDS deaths could be prevented. Thus, we do not so much need new technology, as we need to ensure universal access, utilization and equity. But ensuring universal access, utilization and equity means that our health services cannot continue to function as “business as usual.

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  • Preface Truss Analysis: Matrix Displacement Method 1. What is a Truss? 2. A Truss Member 3. Member Stiffness Equation in Global Coordinates Problem 1. 4. Unconstrained Global Stiffness Equation 5. Constrained Global Stiffness Equation and Its Solution Problem 2. 6. Procedures of Truss Analysis Problem 3. 7. Kinematic Stability Problem 4. 8. Summary Truss Analysis: Force Method, Part I 1. Introduction 2. Statically Determinate Plane Truss types 3. Method of Joint and Method of Section Problem 1. Problem 2. 4. Matrix Method of Joint Problem 3. Problem 4.

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  • The first is Faraday’s law of induction, the second is Amp`ere’s law as amended by Maxwell to include the displacement current ∂D/∂t, the third and fourth are Gauss’ laws for the electric and magnetic fields. The displacement current term ∂D/∂t in Amp`ere’s law is essential in predicting the existence of propagating electromagnetic waves. Its role in establishing charge conservation is discussed in Sec. 1.7. Eqs. (1.1.1) are in SI units.

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  • Structural Theory 7.1 Introduction Basic Equations: Equilibrium, Compatibility, and Co nstitutive Law • Three Levels: Continuous Mechanics, Finite-Element Method, Beam–Column Theory • Theoretical Structural Mechanics, Computational Structural Mechanics, and Qualitative Structural Mechanics • Matrix Analysis of Structures: Force Method and Displacement Method 7.2 Equilibrium Equations Equilibrium Equation and Virtual Work Equation • Equilibrium Equation for Elements • Coordinate Transformation • Equilibrium Equation for Structures • Influence Lines and Surfaces 7.

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  • Population displacement caused by cyclone damage and flooding can result in overcrowding in resettlement areas, raising the risk of transmission of certain communicable diseases. Measles (see section below on vaccine-preventable diseases), ARI, diphtheria and pertussis are transmitted from person to person through respiratory droplets, and the risks are increased in situations of forced relocation to shared areas which are overcrowded and have inadequate ventilation. Overcrowding can also increase the likelihood of transmission of meningitis, waterborne and vector-borne diseases.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A stabilized mixed discontinuous Galerkin method for the incompressible miscible displacement problem

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  • The fracture toughness of medium density fiberboard (MDF) as a function of crack length was measured. Fracture toughness was determined from force–displacement and crack length data using a new energy analysis procedure that avoids the scatter of prior discrete analysis methods. Because crack lengths were difficult to observe, they were measured using digital image correlation (DIC). The R curves for two different densities of MDF, two thicknesses, and for both in-plane and through-the-thickness cracks all increased linearly with crack length.

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  • With advantages such as high strength, high stiffness, high chemical resistance, light weight…composite tubes are widely applied in urban construction and petroleum industry. In this report, the authors used the displacement method to study the mechanical behavior (stress, strain…) of an infinite hollow cylinder made of composite material under unsteady, axisymmetric plane temperature field. In the numerical calculations, we mainly studied the influence of time and volume ratio of the particle on the displacement and thermoelastic stress of a cylinder made of Titanium /PVC composite.

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  • Reproductive health is a human right, and like all other human rights, it applies to refu- gees, internally displaced persons and others living in humanitarian settings. To realize this right, affected populations must have access to comprehensive reproductive health information and services so they are free to make informed choices about their health and well-being. The provision of comprehensive and high-quality reproductive health services requires a multisectoral integrated approach.

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  • 10 Precision Manufacturing 10.1 10.2 10.3 Deterministic Theory Applied to Machine Tools Basic Definitions Motion Rigid Body Motion and Kinematic Errors • Sensitive Directions • Amplification of Angular Errors, The Abbe Principle 10.4 10.

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  • Parametric representation of shapes, mechanical components modeling with 3D visualization techniques using object oriented programming, the well known golden ratio application on vertical and horizontal displacement investigations of the ground surface, spatial modeling and simulating of dynamic continuous fluid flow process, simulation model for waste-water treatment, an interaction of tilt and illumination conditions at flight simulation and errors in taxiing performance, plant layout optimal plot plan, atmospheric modeling for weather prediction, a stochastic search method that explores ...

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  • Starting from a derivation of the conservation equations for multicomponent multiphase flows in porous media and a discussion of convective vs. diffusive/dispersive transport, the reader is introduced to a mathematical framework, based on the method of characteristics, for solving convection-dominated transport problems.

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  • As mentioned in Chapter 10, optical flow is one of three major techniques that can be used to estimate displacement vectors from successive image frames. As opposed to the other two displacement estimation techniques discussed in Chapters 11 and 12, block matching and pel recursive method, however, the optical flow technique was developed primarily for 3-D motion estimation in the computer vision community.

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  • As mentioned in the previous chapter, displacement vector measurement and its usage in motion compensation in interframe coding for a TV signal can be traced back to the 1970s. Netravali and Robbins (1979) developed a pel-recursive technique, which estimates the displacement vector for each pixel recursively from its neighboring pixels using an optimization method. Limb and Murphy (1975), Rocca and Zanoletti (1972), Cafforio and Rocca (1976), and Brofferio and Rocca (1977) developed techniques for the estimation of displacement vectors of a block of pixels.

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  • LIF (laser-induced fluorescence) is a very popular CE detector – These have ~0.01 attomole sensitivity for fluorescent molecules (e.g. derivatized proteins). Direct absorbance (UV-Vis) can be used for organics. For inorganics, indirect absorbance methods are used instead, where a absorptive buffer (e.g. chromate) is displaced by analyte ions – Detection limits are in the 50-500 ppb range. Alternative methods involving potentiometric and conductometric detection are also used – Potentiometric detection: a broad-spectrum ISE – Conductometric detection: like IC...

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  • In clinical practice left ventricular (LV) function is commonly evaluated by 2-D and M-mode echocardiography. These modalities have significant limitations,and tissue Doppler imaging (TDI) has been introduced as a quantitative and more objective method for assessing myocardial function. The TDI modalities include myocardial velocity imaging,displacement imaging,strain rate imaging, and strain imaging (Fig. 1).

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