Dissertations / Theses on the topic 'Directional mapping'
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Williams, William Benjamin. "Source apportionment and dispersion mapping of fugitive dust using directional passive monitors." Thesis, University of Portsmouth, 2014. https://researchportal.port.ac.uk/portal/en/theses/source-apportionment-and-dispersion-mapping-of-fugitive-dust-using-directional-passive-monitors(0f3e3b09-c4b9-4e26-b667-7ab2271f7a1e).html.
Full textToivainen, T. (Tuomas). "Genetic consequences of directional selection in Arabidopsis lyrata." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206905.
Full textTiivistelmä Kasvit ja eläimet levittäytyivät Pohjois-Eurooppaan viimeisen jääkauden jälkeen mannerjäätikön ulkopuolella jääneistä refugioista. Useat kasvit, kuten idänpitkäpalko (Arabidopsis lyrata ssp. petraea) sopeutuivat pohjoisen lyhyeen kasvukauteen. On syytä olettaa, että suuntaava valinta vaikutti sopeutumisessa tärkeisiin ominaisuuksiin. Tässä väitöskirjassa tutkin voidaanko suuntaavan valinnan aiheuttamia jalanjälkiä löytää kahdesta tärkeästä kukkimisaikageenistä, FYTOKROMI A (PHYA) ja FLOWERING LOCUS C1 (FLC1) geeneistä. Tätä varten vertasin DNA sekvenssimuuntelua pohjoisessa (Norja) ja eteläisessä (Saksa) populaatiossa, kiinnittäen erityisesti huomiota geneettisen muuntelun määrään ja erilaistumiseen. Lisäksi tutkin miten Spiterstulenin reunapopulaatio voi vastata tulevaisuudessa muuttuvaan ympäristöön. Sopeutumispotentiaalia arvioitiin sekä fenotyyppisen plastisuuden että additiivisen geneettisen muuntelun määrällä. Lisäksi tutkin miten vaihtelu 21 kukkimisaikageenissä liittyy fenologisiin ja kelpoisuusominaisuuksiin. Useat merkit viittasivat siihen, että suuntaava valinta oli vaikuttanut kummassakin tutkitussa geenissä. Muuntelu oli vähentynyt voimakkaasti kumpaakin geeniä ympäröiviltä kromosomialueilta, jotka olivat myös selkeästi erilaistuneet. Additiivinen geneettinen muuntelu oli selvästi vähentynyt kukkimisominaisuuksissa verrattuna morfologisiin ominaisuuksiin, mahdollisesti suuntaavan valinnan johdosta. Kukkimisominaisuudet olivat kuitenkin plastisia. Jotkin valojaksoreitin geenit vaikuttivat sekä kukkimiseen että lisääntymiskykyyn. Nämä tulokset osoittavat että suuntaava valinta vaikutti kahteen tutkittuun geeniin pohjoiseen levittäytymisen aikana. Geneettiset muutokset liittyivät todennäköisesti muuttuneisiin valojakso-, ja vernalisaatiovasteisiin, jotka saattoivat edistää sopeutumista lyhyeen kasvukauteen. Koska geneettistä muuntelua oli vain hyvin vähän, fenotyyppisellä plastisuudella on todennäköisesti tärkeä rooli sopeutumisessa muuttuvaan ympäristöön Spiterstulenin reunapopulaatiossa
Margaronis, Zannis N. P. "The significance of mapping data sets when considering commodity time series and their use in algorithmically-traded portfolios." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12575.
Full textErdem, Mehmet Erkut. "Image-based Extraction Of Material Reflectance Properties Of A 3d Object." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1128784/index.pdf.
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ectance properties of a three-dimensional (3D) object from its twodimensional (2D) images is explained. One of the main advantages of this system is that the reconstructed object can be rendered in real-time with photorealistic quality in varying illumination conditions. Bidirectional Re&
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ectance Distribution Functions (BRDFs) are used in representing the re&
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ectance of the object. The re&
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ectance of the object is decomposed into di&
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use and specular components and each component is estimated seperately. While estimating the di&
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use components, illumination-invariant images of the object are computed from the input images, and a global texture of the object is extracted from these images by using surface particles. The specular re&
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ectance data are collected from the residual images obtained by taking di&
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erence between the input images and corresponding illumination-invariant images, and a Lafortune BRDF model is &
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tted to these data. At the rendering phase, the di&
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use and specular components are blended into each other to achieve a photorealistic appearance of the reconstructed object.
Lázna, Tomáš. "Autonomní robotické měření záření gama." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316267.
Full textSzentandrási, István. "Moderní techniky realistického osvětlení v reálném čase." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236981.
Full textGustafsson, Jacob. "Mapping drainage of the rootless shield volcano at Dimmuborgir, northern Iceland." Thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-131405.
Full textAl-Sader, Mohamed. "Gaze-driven interaction in video games." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-156718.
Full textKintz, Andrew Lane. "Nullspace MUSIC and Improved Radio Frequency Emitter Geolocation from a Mobile Antenna Array." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1479896813925084.
Full textCasasus, Serge. "De nouveaux artefacts pour la gestion des compétences : l'émergence de "la cartographique"." Thesis, Paris, CNAM, 2019. http://www.theses.fr/2019CNAM1224/document.
Full textSkills are complex management objects which are essential to define employers’ needs and draw one’s profile and wishes. Aggregated in positions, jobs, professions, they form a transactional framework in a space of abstract artefacts and their links. This thesis aims to assert the centrality of a mapping device by examining: the benefits of a clearing of this space, especially trough digital transformation; the indispensable support of technological artefacts to help a person or a group, to identify, decide, evolve in this space; the role of cartographer to be taken by the human resources function. The research is based on a professional career in the field of human resources and methodologically, crosses needs around the notion of competence with the contributions of modern cartography (GIS, geomatics, data visualisation). It leads to a synthesis by the design of a SaaS platform demonstrator, and a cartographic methodology for abstract space
Hunter, Brandon. "Channel Probing for an Indoor Wireless Communications Channel." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/64.
Full textHuang, Fu-Sheng, and 黃富聖. "Simultaneous Localization and Mapping Using Omni-Directional Images." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/87918182424923561514.
Full text國立交通大學
電機與控制工程系所
96
This study investigates robot localization and mapping using omni-directional images. A method is proposed to use an omni-directional camera to realize simultaneous localization and mapping (SLAM) algorithm based on extended Kalman filter (EKF). Because of the 360° field of view, an omni-directional camera is suitable for simultaneous localization and mapping (SLAM) for detecting and tracking environmental features. A new algorithm is developed adopting scale invariant feature transform (SIFT) method to match features in environment between two images. This thesis also presents a switching method of visual reference scans. In this method, reference scan can be added to a database or switched automatically among reference scans. These scans can be used repeatedly to reduce the complexity of extended Kalman filter (EKF). Experiments results show that the matching rate of landmark features is 90%. A long range indoor navigation experiment revealed that the proposed localization algorithm can help robot to navigate in indoor environment and build the features map simultaneously.
Guo, Jing-ting, and 郭勁廷. "Optimal Resolving Directional Ambiguity in DInSAR Deformation Mapping." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/44641836237664665456.
Full text國立中央大學
遙測科技碩士學位學程
99
Radar interferometry is a powerful technique for extracting information about the Earth’s surface using the phase difference between the signals arriving at the sensor antenna during repeated observations from the same platform. However, the problematic issue is that since radar senses and measures in slant range, it does not tell whether the displacement comes from horizontal or vertical direction, namely, a directional ambiguity inherently exists. A method based on weighted least squares is proposed to resolve it by integrating both ascending and descending orbits in order to determine whether the deformation is of uplift type or of subsidence. The resolved deformation pattern into three directions is useful to understand the movement mechanism and also to facilitate the direct comparison with ground leveling or measurements. Assuming that all the measurements, whether descending or ascending, are uncorrelated and independent but with different phase variances depending on the coherence, best linear unbiased estimator may be derived. To better confirm the subsidence map derived from series ALOS-PALSAR image data takes, comparisons with the precision leveling survey were made. Excellent agreement was obtained on both the spatial pattern and scale at centimeter resolution. Both ascending and descending mapping results indicate that the maximum subsidence rate in that period as about 6.7 cm/yr (at an epicenter). It was suggested that reliable deformation estimate is contingent upon the combination of long-term and short-term observations using dual-beam SAR image data sets preferably at different inclination angles.
Lin, Yueh-Chi, and 林玥其. "Performance-aware Task Mapping for Bi-directional NoC Architecture." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/63661237460537187164.
Full text國立臺灣大學
電子工程學研究所
97
In this Thesis, we propose a performance-aware task mapping algorithm for BiNoC (bi-directional network-on-chip) architecture. The whole framework contains two phases: task clustering and task mapping. For a given task graph and a BiNoC topology, the task clustering phase partitions a task graph into appropriate clusters to minimize the system parallelization time. The task mapping phase employs an SA-based (simulated annealing-based) algorithm which maps clusters of TCG (task communication graph) to PEs (processing elements) injectively. The SA-based algorithm uses real execution time as the cost function and considers the negative effect caused by contentions. Since the channel direction is configurable in a BiNoC, our approach makes use of this characteristic to allocate channel admission to the communication demands and lead to a low system execution time. Experimental results show that, compared to other existing mapping approaches for performance-aware purpose, our approach achieves a significant decrease in packet latency.
Wang, Chao-Wu, and 王兆戊. "Simultaneous localization and mapping of an omni-directional robotic platform." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/85898831939580458799.
Full text國立交通大學
電機與控制工程系所
96
This thesis investigates simultaneous localization and mapping (SLAM) of an omni-directional mobile robot. A method is proposed to use an omni-directional camera to realize SLAM algorithm based on extended Kalman filter (EKF). This study focus on the use of 360° of view of the omni-directional camera to reduce the accumulative error from odometer and to achieve simultaneous localization and mapping of the omni-directional platform. The method of visual reference scans is adopted in this design. Features of previously visited places can be used repeatedly to reduce the complexity of extended Kalman filter. Experimental results show that the matching rate of landmark features is 93%. The localization error is less than 0.10m for traveling 16 meters of “8” shaped route. Indoor navigation experiments revealed that the proposed localization system can navigate the omni-directional robot in an indoor environment and build the feature map simultaneously.
Chen, Kou Chang, and 陳國章. "Directional adaptive moving average filtering for non-linear texture mapping." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/97623766141201229015.
Full textKapralos, Bill. "The sonel mapping acoustical modeling method /." 2006. http://proquest.umi.com/pqdweb?index=0&did=1306835141&SrchMode=1&sid=4&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1195136081&clientId=5220.
Full textTypescript. Includes bibliographical references (leaves 266-281). Also available on the Internet. MODE OF ACCESS via web by entering the following URL: http://proquest.umi.com/pqdweb?index=0&did=1306835141&SrchMode=1&sid=4&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1195136081&clientId=5220
Yi-ChungWu and 伍以中. "Simultaneous Localization and Mapping of Multisensor Omni directional Wheeled Robots and Its Application to Obstacle Avoidance." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/f3gd6w.
Full textYang, Yu-Hsiang, and 楊宇翔. "The Inverse Problem for the Bi-directional Nonlinear Mapping between the Three-dimensional Surface and the Two-dimensional Plane by ISOMAP." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/37028043889293201347.
Full text逢甲大學
應用數學所
98
In computational field simulation, the techniques of adjusting grid are frequently used to obtain highly accurate numerical solutions. In the past, it is difficult to adjust the surface grids within three-dimensional space. In this thesis, we developed a new strategy that applies the technique of dimensionality reduction to overcome this problem. This new strategy can perform a bi-directional nonlinear mapping between three-dimensional surface and two-dimensional plane that can be applied to the study of adaptive grid, multigrid and so on. Either the structured surface grid or the unstructured surface grid, both can be mapped from three-dimensional space into two-dimensional space via Isomap which is based on manifold learning. The related position in two-dimensional data points will be kept the same as they are in its corresponding three-dimensional space. According to this relation, we can adjust the grid points directly in two-dimensional space. There are two kinds of methods for adjustment: one is the grid redistribution, the other is refining the grid locally. After adjusting strategy, bilinear interpolation (for structured grid) or barycentric interpolation (for unstructured grid) can be used to find the relation between the adjusted grid and the non-adjusted grid. And then the new three-dimensional surface grid can be constructed completely via this relation by remapping the adjusted plane grid into the original three-dimensional grid. This process can get the effect of adaptation.
jian, ya-ting, and 簡亞庭. "A Hybrid Reversible Data Hiding Method by Reversible Contrast Mapping and Exploiting Modification Direction." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/72595002390508279878.
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