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 20 for “"Gaussian Function"”.
-
View-dependent precomputed light transport using non-linear Gaussian function approximations
… of the light transport operator based on sums of Gaussians. The non-linear parameters of the representation allow for 1) arbitrary bandwidth because scale is encoded as a direct parameter; and 2) high-quality interpolation across view and mesh triangles because we interpolate the average direction …
-
The consequences of predation by Chaoborus americanus on Daphnia pulex
… on Daphnia that can be well approximated by a Gaussian function. Maximum vulnerability is experienced by Daphnia with body size of about 1 mm. Daphnia larger that 2 mm were essentially invulnerable. Several techniques are presented that remove biases that exist in previous methods used to …
-
Fast Waveform Pattern Matching With Significant-Point Frames
… a signal with a parametric kernel, such as the Gaussian function. The contour plot and interval tree record migrations and disappearances of the level-crossings of linear differential operators across multiple convolutions. These structures can be viewed as compressed, hierarchical …
-
Gaussian Splatting Device-Architecture Co-Design for Accelerated Physical AI Inference and Reasoning
… memory-efficient, and computationally lean. Gaussian Splatting has established itself as the state-of-the-art technique for 3D scene representation, delivering photorealistic rendering quality that surpasses traditional methods. However, this fidelity comes at a steep computational cost, …
-
Theory and fabrication of colloidal-crystal Bragg filters
… The spectra are modified by convolving with a Gaussian function to represent crystal defects. Scattering losses are calculated to attenuate the out-of-band transmission. The theory is tested by comparing theoretical spectra with experimental spectra from colloidal-crystal Bragg filters …
-
SCL: A Lattice-Based Approach to Infer Three-Dimensional Chromosome Structures from Single-Cell Hi-C Data
… on single-cell Hi-C data. We designed a loss function and a 2D Gaussian function specifically for the characteristics of single-cell Hi-C data. A chromosome is represented as beads-on-a-string and stored in a 3D cubic lattice. Metropolis-Hastings simulation and simulated annealing are used to …
-
Fast Monte Carlo Simulation of ⁹⁰Y Bremsstrahlung using a Kernel-based Photon Source
… These are recorded as probability distribution functions (PDFs). Then, a kernel-based photon source which comprises of an array of photon-emitting concentric spherical shells is developed. The energy spectrum and angular distributions of the emitted photons are defined for each shell using the …
-
Intrinsic Hardware Evolution on the Transistor Level
… targeted at a wide variety of different circuit functionalities. These comprise logic gates, Gaussian function circuits, D/A converters, low- and highpass filters, tone discriminators, and comparators. The experimental results are thoroughly analyzed and discussed with respect to related work.
-
The Determination Of Ocean Correlation Scales Using Argo Float Data
… scales are calculated by the fitting of a Gaussian function to the differences in salinity between observation pairs that satisfy given spatial and temporal separation requirements. The intercept and scale that result in the best fit are taken to be the optimum values for the region. The …
-
Modelling evolution of genome size in prokaryotes in response to changes in their abiotic environment
… niche space model, a gene was defined as a Gaussian function over a corresponding niche dimension. The cell can have more than one gene along a given dimension, and the envelope of all the corresponding responses is considered a full description of a cell’s phenotype over that dimension. …
-
Catalytic Studies Of Noble Metal Nanocatalysts Using Single-Molecule Fluorescence Microscopy
… on a camera and fitting the emitted point spread function to a two-dimensional Gaussian function, sub-diffraction spatial resolution of ~25 nm was achieved. By overlaying the optical imaging results onto a scanning electron microscopy (SEM) image of the same nanoparticles, correlation of structure …
-
Secure Gaussian sampling for lattice-based signatures: new directions for reaching high standard deviation
… prevalent component of these primitives is the Gaussian sampler - a random number generator producing Gaussian-distributed values. The work in this thesis aims to explore candidate algorithms for the secure sampling of Gaussian distributions with high standard deviation.<br/><br/>The sampling …
-
Advances in volumetric super-resolution microscopy and single-particle tracking
… as the astigmatic and double-helix point spread functions (PSFs)---have been developed. These techniques encode the lateral and axial positions of single fluorophores into the PSF shape but at the cost of reduced spatial and temporal resolution. This limitation restricts the compatibility of …
-
Fast estimation model of pressure-temperature response for planning focused ultrasound surgery
… rise is then generated by using a standard Gaussian function and a Genetic Algorithm. The optimized form of prediction model function is adopted as estimation models for different tissue layers and geometric arrangements. The average percentages of error found in homogeneous (liver) media …
-
Fiber Orientation Modeling: a Method to Improve Quantitation of Intramyocellular Lipids in Human Subjects at 7 Tesla
… symmetrical, represented by a single Lorentzian, Gaussian or Voigt (hybrid lineshape between Gaussian and Lorentzian) lineshapes. However, significant asymmetry in the resonance assigned to the methylene protons (-CH2-)n in extramyocellular lipids (EMCL) interfered with fitting the spectra. In …
-
Using two-dimensional impedance maps to study acoustic properties of tissue microstructure
… models are based on analytic expressions (e.g., Gaussian function) and not on actual tissue morphology. The three-dimensional impedance map (3DZM) is a computational tool to create tissue specific form factor models directly from tissue histology. 3DZMs are constructed from a series of adjacent …
-
A TECHNIQUE FOR MEASURING THE TIME RESPONSE AND THROUGH-PUT DELAY OF NEUTRON TIME-OF-FLIGHT (nTOF) SCINTILLATION DETECTORS USING COSMIC RADIATION IN A COINCIDENCE SYSTEM
Plastic scintillator-based neutron time-of-flight (nTOF) detectors are used to measure neutron signals from fusion experiments. These nTOF signals yield a temporal pulse width that is used to determine ion temperatures after the de-convolution of the experimentally determined detector time response …
-
Numerické metody pro rekonstrukci chybějící obrazové informace
The Diploma thesis deals with reconstruction of Missing data of an Image. It is done by the use of appropriate Mathematical theory and numerical algorithm to reconstruct missing information. The result of this implementation is the reconstruction of missing image information. The thesis also …
-
Modeling and Optimization of Individualized Liver Contrast-enhanced CT Imaging
… a more robust contrast enhancement model using Gaussian function and neural network. In the second part of the dissertation (chapter 4), we turned our focus to applying the patient-informed prediction model prospectively in the clinic. Chapter 4 involved the development of a graphical user …
-
Multi-Scale Physics Based Modeling of Tire Rolling Resistance Considering Aging
… approach. The model was developed by proposing a Gaussian wave function propagating across a tire circumference's viscoelastic medium. The wave function was selected to describe the displacement field produced by tire-road interaction. Additionally, by adopting a multi-scale modeling technique, …