Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 52 for “"Coordinate Transformation"”.
-
Sign-Inverting Vectors Underlie a Coordinate Transformation in the Drosophila Central Brain
<p>Our coherent sense of orientation is built from combining sensory experiences across different modalities. How animal brains compute and remember the directions of motion of the body, limbs, objects or landmarks in a shared reference frame is only now becoming clear.This dissertation focuses on …
-
Rotation-Vibration States of Weakly Bound Linear Symmetric Triatomic Molecules: Helium-Hydride and Helium-Deuteride (Hamiltonian, Variation, Direct Coordinate Transformation)
… derived by Estes and Secrest through direct coordinate transformation method. Various forms of this Hamiltonian for a linear triatomic molecule are presented. The potential energy function for the He(,2)H('+) and He(,2)D('+) molecules is expanded in terms of power series of local functions of …
-
Study on transformation-based invisibility cloaks
… engineered to achieve special functions, and the coordinate transformation theory, has offered an unprecedented opportunity for realizing invisibility cloaking. Coordinate transformation theory predicts that by squeezing the space to form a "hole" in it, any object inside the "hole" becomes …
-
Multiple feed reflector antenna analysis
… is used to determine the incident field via a coordinate transformation approach. The incident field from each element is superimposed to form the total field used in finding the surface currents of the physical optics radiation integral. The technique allows each element to be arbitrarily …
-
Modeling and Control of Modular Multilevel Converter
… of the MMC based on state-plane analysis and coordinate transformation, is proposed in the literature. Based on the state-plane analysis, two kinds of circulating power in the MMC are identified that are orthogonal to each other. This means these two circulating power can be controlled …
-
Autonomous Search and Rescue: Real-Time Drone and Robotic Dog Integration
… autonomous navigation system. By leveraging coordinate transformation logic, this study enables real-time aerial reconnaissance and ground-based waypoint navigation without reliance on GPS. The methodology includes software development using the Spot SDK and Tello APIs, a virtual networked …
-
Decoupled Stability Analysis of Power Systems With Slow and Fast Dynamics
… perturbed systems. Through a near-identity coordinate transformation, the slow and fast dynamics are partially decoupled, allowing for independent stability studies in the slow and fast subspaces. The decoupled subsystems can be physically interpreted as smaller size power systems. On a …
-
Nonlinear Control for Dual Quaternion Systems
… method for mathematically modeling rigid body transformations, expressing both rotation and translation. Dual quaternions can be viewed as a representation of the special Euclidean group <em>SE</em> (3). An eight dimensional representation of screw theory (combining dual numbers with …
-
Accuracy Improvement of Terrestrial Mobile Lidar System in Engineering Surveys
… error sources. Firstly, the 3D conformal coordinate transformation (3DCCT) through Least Squares Method (LSM) was applied by employing the ground control points incorporating with feature constraints. Secondly, the multistrip adjustment (MA) algorithm was developed by taking advantage of …
-
Estudo sobre a qualidade da resposta dinâmica do Método de Superposição dos Modos de Lanczos
… the generation of load-dependent vectors for the coordinate transformation, were tested with the use of load participation factor and an effective mass. Also, several algorithms to the generation of differents processes of basis orthogonalization were tested. As conclusion, were presented the …
-
Automatic simulation-driven reachability using matrix measures
… regular Euclidean norm or Euclidean norm under coordinate transformation, such that the exponential rate of the discrepancy function is locally minimized. The proposed methods enable automatic reach set computations of general nonlinear systems and have been successfully used on several …
-
A numerical analysis of coupled solidification and natural convection within a two-dimensional rectangular cavity
… interface are used to determine its motion. A coordinate transformation based on solid thickness and an alternating direction implicit differencing scheme are the central features of the numerical method. For the limited range of non-dimensional parameters studied, steady state values of solid …
-
Backstepping Control and Transformation of Multi-Input Multi-Output Affine Nonlinear Systems into a Strict Feedback Form
… theory to be applied. The geometrical coordinate transformation of multi-input multi-output affine nonlinear systems into strict feedback form has not been detailed in previous publications. In this research, a new approach is presented that extends the transformation process of …
-
Nonexplicit Singular Perturbations and Interconnected Systems
… conservation properties are shown to provide a coordinate-free characterization of two-time-scale systems. They also suggest a coordinate transformation that transforms nonexplicit models into explicit ones. This transformation is then used to study nonlinear high gain feedback systems, thus …
-
Building an Allocentric Traveling-Direction Signal Via Vector Computation
… which performs an egocentric-to-allocentric coordinate transformation and vector addition, may generalize to other brains and to domains beyond navigation where vector operations or reference-frame transformations are required.</p>
-
Modeling of high fluence Ti ion implantation and vacuum carburization in steel
… were then included by means of an appropriate coordinate transformation. C was assumed to be gettered from the vacuum system in a one-to-one ratio with the surface Ti concentration up to a saturation point. Both Ti and C were allowed to diffuse. A series of experimental (Auger) …
-
A clutter power computation procedure for airborne Doppler radar
… justification for the azimuth to Doppler coordinate transformation, and the power spectrum returned to the airborne Doppler radar from the surface it illuminates. This algorithm produces a continuous power returned waveform versus time. Hence, this algorithm has the flexibility to accept …
-
Analysis and control of marine cable systems
… marine cables. One-dimensional dynamics Using a coordinate transformation, the method can predict the unsteady dynamic behaviour of systems where the length of cable varies. Two-dimensional dynamics The methodology adopted in the one-dimension analysis is extended to a more general case. …
-
On the path integral formulation and the evaluation of quantum statistical averages
… is the same as one would obtain using a normal coordinate transformation, We next introduced the method of Papadopolous (1969), which is a systematic perturbation type method specifically geared to finding the partition function Z, or equivalently, the Helmholtz free energy F, of a system of …
-
On the Potential Impact of Curved Meshing for Higher-order Adaptive Mesh Simulations
… PDE in both Cartesian and polar coordinate systems, with the polar coordinate transformation serving to demonstrate the potential benefits of incorporating curvature into an adaptive meshing process. Results are presented for both uniform and adaptive refinement, considering first …
Page 1 of 3