Browsing by Title
Now showing items 221-240 of 4790
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An empirical resistive-force theory for slender biological filaments in shear-thinning fluids
(American Physical SocietyPhysical Review E - Statistical, Nonlinear, Biological, and Soft Matter Physics, 2017-06-23)Many cells exploit the bending or rotation of flagellar filaments in order to self-propel in viscous fluids. While appropriate theoretical modeling is available to capture flagella locomotion in simple, Newtonian fluids, ...
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An Expectation Maximization Approach for Integrated Registration, Segmentation, and Intensity Correction
(2005-04-01)This paper presents a statistical framework which combines the registration of an atlas with the segmentation of MR images. We use an Expectation Maximization-based algorithm to find a solution within the model, which ...
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An experimental and theoretical study of the dynamics of grounding lines
(Cambridge University Press, 2013-07-01)We present an experimental and theoretical study of a thin, viscous fluid layer that flows radially under gravity from a point source into a denser inviscid fluid layer of uniform depth above a rigid horizontal surface. ...
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An experimental study of the spread of buoyant water into a rotating environment
(University of CambridgeDepartment of Applied Maths and Theoretical PhysicsQueens', 2017-05-01)This thesis examines previously unresolved issues regarding the fluid dynamics of the spread of buoyant water into a rotating environment. We focus in particular on the role that finite potential vorticity and background ...
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An explicit upper bound for the Helfgott delta in SL(2,p)
(ElsevierJournal of Algebra, 2014-09-23)Helfgott proved that there exists a δ > 0 such that if S is a symmetric generating subset of SL(2, p)containing 1 then either S^3=SL(2, p)or |S^3| ≥|S|^1+ δ. It is known that δ ≥ 1/3024. Here we show that δ ≤ (log_2 (7) ...
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An integral equation method for the homogenization of unidirectional fibre-reinforced media; antiplane elasticity and other potential problems
In Parnell & Abrahams (2008 Proc. R. Soc. A 464, 1461–1482. (doi:10.1098/rspa.2007.0254)), a homogenization scheme was developed that gave rise to explicit forms for the effective antiplane shear moduli of a periodic ...
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An interface element based on the partition of unity
(Delft University of Technology, 2001)An alternative interface finite element is developed. By using the partition of unity property of finite element shape functions, discontinuous shape functions are added to the standard finite element basis. The interface ...
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An introduction to applications of wavelet benchmarking with seasonal adjustment
(WileyJournal of the Royal Statistical Society: Series A (Statistics in Society), 2016-11-05)Before adjustment, low and high frequency data sets from national accounts are frequently inconsistent. Benchmarking is the procedure used by economic agencies to make such data sets consistent. It typically involves ...
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An introduction to the Cambridge advanced modeller
(Modelling and Management of Engineering ProcessesModelling and Management of Engineering Processes, 2010-06-25)Complex products and their development processes may be viewed as systems, whose different aspects can be modelled as networks of interactions between elements in different domains. Many approaches have been proposed to ...
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An Iterative Wiener--Hopf method for triangular matrix functions with exponential factors
This paper introduces a new method for constructing approximate solutions to a class of Wiener{Hopf equations. This is particularly useful since exact solutions of this class of Wiener{Hopf equations, at the moment, cannot ...
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An upper bound for the pseudoisotopy stable range
(SpringerMathematische Annalen, 2017-08-01)We prove that the pseudoisotopy stable range for manifolds of dimension 2n can be no better than (2n - 2). In order to do so, we define new characteristic classes for block bundles, extending our earlier work with Ebert, ...
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Analog "Neuronal" Networks in Early Vision
(1985-06-01)Many problems in early vision can be formulated in terms of minimizing an energy or cost function. Examples are shape-from-shading, edge detection, motion analysis, structure from motion and surface interpolation ...
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An Analog Model of Computation for the Ill-Posed Problems of Early Vision
(1984-05-01)A large gap exists at present between computational theories of vision and their possible implementation in neural hardware. The model of computation provided by the digital computer is clearly unsatisfactory for the ...
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An Analog VLSI Chip for Estimating the Focus of Expansion
(1996-08-21)For applications involving the control of moving vehicles, the recovery of relative motion between a camera and its environment is of high utility. This thesis describes the design and testing of a real-time analog ...
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Analogical Retrieval via Intermediate Features: The Goldilocks Hypothesis
(2006-11-07)Analogical reasoning has been implicated in many important cognitive processes, such as learning, categorization, planning, and understanding natural language. Therefore, to obtain a full understanding of these processes, ...
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Analsysis by Propagation of Constraints in Elementary Geometry Problem Solving
(MIT Artificial Intelligence Laboratory, 1976-06)This paper describes GEL, a new geometry theorem prover. GEL is the result of an attempt to transfer the problem solving abilities of the EL electronic circuit analysis program of Sussman and Stallman to the domain of ...
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Analysis and Control of Robot Manipulators with Kinematic Redundancy
(1987-05-01)A closed-form solution formula for the kinematic control of manipulators with redundancy is derived, using the Lagrangian multiplier method. Differential relationship equivalent to the Resolved Motion Method has been ...
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Analysis and Implementation of Robust Grasping Behaviors
(1990-05-01)This thesis addresses the problem of developing automatic grasping capabilities for robotic hands. Using a 2-jointed and a 4-jointed nmodel of the hand, we establish the geometric conditions necessary for achieving ...
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Analysis of a Cooperative Stereo Algorithm
(1977-10-01)Marr & Poggio (1976) recently described a cooperative algorithm that solves the correspondence problem for stereopsis. This article uses a probabilistic technique to analyze the convergence of that algorithm, and ...