Дисертації з теми "Gradient-Enhanced"
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Hopkinson, David P. "Development of stress gradient enhanced piezoelectric composite unimorph actuators." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/16372.
Повний текст джерелаBéchet, Antoine. "Ultrasonic detection of debonding within a gradient enhanced piezoelectric actuator (GEPAC)." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17914.
Повний текст джерелаDemiral, Murat. "Enhanced gradient crystal-plasticity study of size effects in B.C.C. metal." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/11634.
Повний текст джерелаBennett, Raffeal. "Gradient Enhanced Fluidity Liquid Chromatography using the Hydrophilic Interaction Separation Mode." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500995708235286.
Повний текст джерелаJelvehpour, Ali. "Development of a transient gradient enhanced non local continuum damage mechanics model for masonry." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/93365/1/Ali_Jelvehpour_Thesis.pdf.
Повний текст джерелаGex, Dominique. "Ultrasonic NDE testing of a gradient enhanced piezoelectric actuator (GEPAC) undergoing low frequency bending excitation." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04062004-171807/unrestricted/gex%5Fdominique%5Fc%5F200405%5Fmast.pdf.
Повний текст джерелаBerthelot, Committee Chair; Lynch, Committee Member; Jacobs, Committee Member. Includes bibliographical references (leaves 111-113).
Ribeiro, Nogueira Breno. "Non-local damage mechanics with evolving interactions for modeling quasi-brittle materials : anisotropic damage and gradient-enhanced Eikonal approach." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST072.
Повний текст джерелаPredicting the cracking nucleation and propagation is essential to describe structural response under complex loading conditions. Diffuse micro-cracks are observed to appear before coalescing into a macro-crack. In the case of quasi-brittle materials, strain-softening behavior is observed and is related to a progressive loss of stiffness. From a thermodynamics viewpoint, this can be described in a continuum way by a damage state variable.However, local continuum damage mechanics models inevitably lead to an ill-posed rate equilibrium problem. In a finite element context, numerical results are, therefore, mesh-dependent. Non-local damage models can recover mesh-independent results by introducing neighborhood interactions through an internal length. Classic non-local approaches consider isotropic and constant interactions, which cannot reproduce the entire degradation process appropriately. Evolving interaction approaches exist and may better describe the cracking behavior. This thesis aims to provide theoretical and numerical aspects for developing evolving interactions gradient-enhanced damage models. Firstly, non-local models are studied and compared by analyzing boundary effects and damage diffusion in a one-dimensional explicit dynamics spalling test.The Eikonal non-local approach is given attention, where evolving interactions are considered through a damage-dependent Riemannian metric. The gradient-enhanced version of this model (ENLG) is then derived from a differential geometry-based micromorphic framework, leading to a dissipation expression fulfilling thermodynamics second principle. A simplified variational formulation is developed to evaluate the model's capabilities in two-dimensional isotropic damage quasi-static numerical simulations. Finally, the ENLG regularization is coupled to an anisotropic damage model considering a second-order damage tensor. Damage-induced anisotropy is naturally considered in the behavior and the evolving interactions. Simulations in two and three-dimensional contexts are studied and compared to existing experimental results from the literature while highlighting the numerical aspects involved. A detailed analysis describes the advantages of considering anisotropic damage and damage-dependent anisotropic interactions
Zhou, Xinzhe. "Development of Gold Nanocluster-Based Biosensors." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/76678.
Повний текст джерелаMaster of Science
Ohno, Tsuyoshi. "Usefulness of breath-hold inversion recovery-prepared T1-weighted two-dimensional gradient echo sequence for detection of hepatocellular carcinoma in Gd-EOB-DTPA-enhanced MR imaging." Kyoto University, 2017. http://hdl.handle.net/2433/218009.
Повний текст джерелаYamashita, Rikiya. "Non-Contrast-Enhanced Magnetic Resonance Venography using Magnetization-Prepared Rapid Gradient-Echo in the Preoperative Evaluation of Living Liver Donor Candidates: Comparison with Conventional Computed Tomography Venography." Kyoto University, 2017. http://hdl.handle.net/2433/225980.
Повний текст джерелаWiedermann, Magdalena. "Responses of peatland vegetation to enhanced nitrogen." Doctoral thesis, Umeå : Department of Ecology and Environmental Science, Umeå University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1655.
Повний текст джерелаLee, Jong-Heon. "Preparation of high density particulate preforms and their consolidation by the thermal gradient-forced flow diamond CVI process." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/32811.
Повний текст джерелаWANG, XIAO-ZHU, and 王筱筑. "Enhanced Salinity Gradient Power with Branched Alumina Nanochannels." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3yj4j3.
Повний текст джерелаLiu, Weiyu. "Development of gradient-enhanced kriging approximations for multidisciplinary design optimization." 2003. http://etd.nd.edu/ETD-db/theses/available/etd-07012003-215221/.
Повний текст джерелаThesis directed by Stephen M. Batill for the Department of Aerospace and Mechancial Engineering. "July 2003." Includes bibliographical references (leaves 159-163).
Kang, Chia-Yu, and 康嘉佑. "Using laser-induced temperature gradient to accumulate micro- and nanoparticles and to enhance surface-enhanced Raman spectroscopy (SERS) effects." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/82177925123854743943.
Повний текст джерелаLiao, Kuan-Kai, and 廖冠凱. "Surrounding Pedestrian and Motorcyclist Detecting and Tracking System with Vehicle base on Enhanced and Complex Histogram of Gradient Features." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hkg2ca.
Повний текст джерела國立臺北科技大學
資訊工程系
106
In recent years, the fast development of society and economy in various countries, the number of private transportation vehicle is also increasing, not only causes traffic congestion, but also cause traffic accidents more and more frequently. Because Taiwan is a small island, which is highly populated, so the motorcycle are the most convenient transportation, also the most common on the road. Oppositely, the motorcyclists’ traffic accidents rate is highest in all transportation and also be prone to accidents with pedestrian. Therefore, this thesis proposes a surrounding pedestrian and motorcyclist detecting and tracking system with vehicle algorithms to decrease accident rate. The most commonly used descriptor for describing object features in the field of object detection is Histogram of Oriented Gradients (HOG). Because HOG performs feature extraction in local blocks of the image, the geometric and optical deformation of the image can be kept very invariant, but in a complicated environment, there may be cases of misjudgment of objects. The traditional HOGs normalization scope is a single block, but it is possible to ignore the influence of the surrounding blocks, it’s liable to have a misjudgment when encountering complicational textures in image, and because the feature dimension of traditional HOG is very large, the computational speed is difficult to achieve in real time. Therefore, this thesis proposes a HOG algorithms that can accelerate and improve the normalization range. In addition, a compound feature detection method is also proposed to determine whether the helmet is appearing in detected motorcyclist object to reduce the false positive rate. This thesis propose a new ROI define method, which can effectively filter out unnecessary parts of the image to speed up detection time. In order to apply this thesis to more situations, the algorithm is implemented in the embedded platform NVIDIA TX2, and the overall detection rate is over 90% in both embedded systems and personal computers.
Seupel, Andreas. "Thermomechanische und schädigungsmechanische Modellierung von hochlegierten TRIP-Stählen." 2020. https://tubaf.qucosa.de/id/qucosa%3A74440.
Повний текст джерелаThe present thesis comprises the development and numerical implementation of a non-local damage model in order to describe ductile failure of a cast austenitic TRIP-steel. The TRIP-steel shows a martensitic phase transformation during deformation. The transformation and strain hardening behavior is strongly dependent on temperature and stress state. For this reason, a fully thermomechanically coupled viscoplasticity model is proposed, which exhibits the temperature dependent tension-compression-asymmetry of strain hardening and deformation-induced martensite evolution. Experimentally observed crossing effects of the flow curves can be predicted at increased strain rates. The damage modeling is based on the viscoplastic basic model, whereby the mesh-independent behavior is achieved by a gradient extension within the framework of micromorphic theory. Different approaches for damage initiation and evolution can be combined within the model. The influences of the model parameters on results of crack growth simulations are investigated and evaluated for selected model variants. With the help of developed calibration strategies the qualified variants can be successfully adapted to experimental results of notched tensile tests and compact tension tests.