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Dissertations / Theses on the topic 'CIRCULAR HARMONICS'

Author: Grafiati
Published: 11 September 2023

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1

Quellmalz, Michael. "Reconstructing Functions on the Sphere from Circular Means." Universitätsverlag Chemnitz, 2019. https://monarch.qucosa.de/id/qucosa%3A38406.

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The present thesis considers the problem of reconstructing a function f that is defined on the d-dimensional unit sphere from its mean values along hyperplane sections. In case of the two-dimensional sphere, these plane sections are circles. In many tomographic applications, however, only limited data is available. Therefore, one is interested in the reconstruction of the function f from its mean values with respect to only some subfamily of all hyperplane sections of the sphere. Compared with the full data case, the limited data problem is more challenging and raises several questions. The fi
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2

Khoshniat, Ali. "A Linearly and Circularly Polarized Active Integrated Antenna." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/881.

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This thesis work presents a new harmonic suppression technique for microstrip patch antennas. Harmonic suppression in active integrated antennas is known as an effective method to improve the efficiency of amplifiers in transmitter side. In the proposed design, the antenna works as the radiating element and, at the same time, as the tuning load for the amplifier circuit that is directly matched to the antenna. The proposed active antenna architecture is easy to fabricate and is symmetric, so it can be conveniently mass-produced and designed to have circular polarization, which is preferred in
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3

Salahifar, Raydin. "Analysis of Pipeline Systems Under Harmonic Forces." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19820.

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Starting with tensor calculus and the variational form of the Hamiltonian functional, a generalized theory is formulated for doubly curved thin shells. The formulation avoids geometric approximations commonly adopted in other formulations. The theory is then specialized for cylindrical and toroidal shells as special cases, both of interest in the modeling of straight and elbow segments of pipeline systems. Since the treatment avoids geometric approximations, the cylindrical shell theory is believed to be more accurate than others reported in the literature. By adopting a set of consistent geom
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4

Santos, Nalzira Medalha dos. "Os processos circulares como instrumento para a investigação dos elementos que contribuem para a relação harmoniosa entre professor e aluno." Universidade de Taubaté, 2015. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=788.

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This work is related to a research about teacher-student relationship developed with seventeen teachers from a public school, from a country town in São Paulo State. The aims are: from the educator point of view, investigate which elements contribute to a harmonious relationship between teacher and student and inquire, from the same point of view, which are the obstacles that challenge the current teacher-student relationship. For that, the circular process technique was used as a methodology, where some questions related to the teacher and student relationship were proposed, they were recorde
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5

Herald, Christopher R., and Christopher R. Herald. "The Advent of an Artist-Composer Movement Exemplified by the Works of Saxophonists Colin Stetson, Evan Parker, and Contemporaries." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625662.

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Arising out of the avant-garde jazz tradition, a particular genre of solo saxophone music has emerged that combines stylistic attributes of avant-garde jazz and improvisation with minimalism, and is dependent on circular breathing, harmonic manipulation, and other techniques. To distinguish the music and the saxophonists and composers associated with it I have referred to this genre as "post avant-garde." With its roots ultimately in avant-garde jazz of the 1960s, this genre arose through the solo improvisation work of Evan Parker from the 1970s to present, and the music has since been an infl
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6

Kumar, Bhunesh. "Design of Harmonic Filters for Renewable Energy Applications." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1862.

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Harmonics are created by non-linear devices connected to the power system. Power system harmonics are multiples of the fundamental power system frequency and these harmonic frequencies can create distorted voltages and currents. Distortion of voltages and currents can affect the power system adversely causing power quality problems. Therefore, estimation of harmonics is of high importance for efficiency of the power system network. The problem of harmonic loss evaluation is of growing importance for renewable power system industry by impacting the operating costs and the useful life of the sys
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7

Bakhshi, Shashwat. "Numerical Analysis to Study the Effect of Sag and Non-circular Whirl Orbits on the Damping Performance of a Squeeze Film Damper." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522420027908978.

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8

David, Anca Hélène. "L'évolution du droit de l'environnement de l'Union européenne : un outil de mise en place de l'économie verte et circulaire." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB177.

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L'évolution du droit de l'environnement de l'Union européenne a conduit au développement d'un objectif nouveau qui vise à promouvoir l'éco-innovation et les modèles d'entreprise verts, afin de mettre en place une économie verte et circulaire. Ce nouvel objectif a eu des conséquences sur sa forme et son contenu. En effet, la forme du droit de l'Union européenne en matière d'environnement est dominée par des directives-cadres et présente une flexibilité accrue, tandis que son contenu intègre de nouveaux modèles d'entreprise, notamment le modèle d'entreprise circulaire. La transition vers une éco
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9

Harouni, Zied. "Conception et caractérisation d’une Rectenna à double polarisation circulaire à 2.45 GHz." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST1026/document.

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Les travaux présentés dans ce mémoire s'inscrivent dans la thématique de la transmission d'énergie sans fil, appliquée à l'alimentation à distance de capteurs, de réseaux de capteurs et d'actionneurs à faible consommation. Cette étude porte sur la conception, la caractérisation, et la mesure d'un circuit Rectenna (Rectifying antenna) à double polarisation circulaire à 2.45 GHz, compact et à rendement de conversion RF-DC optimisé. Un outil d'analyse globale basé sur la méthode itérative a été développé et exploité pour valider la faisabilité de cette analyse. La diode Schottky a été modélisée e
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10

Chen, Zhangchi. "Differential invariants of parabolic surfaces and of CR hypersurfaces; Directed harmonic currents near non-hyperbolic linearized singularities; Hartogs’ type extension of holomorphic line bundles; (Non-)invertible circulant matrices On differential invariants of parabolic surfaces A counterexample to Hartogs’ type extension of holomorphic line bundles Directed harmonic currents near non-hyperbolic linearized singularities Affine Homogeneous Surfaces with Hessian rank 2 and Algebras of Differential Invariants On nonsingularity of circulant matrices." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASM005.

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La thèse se compose de 6 articles. (1) Nous calculons les générateurs des SA₃(ℝ)-invariants pour les surfaces paraboliques. (2) Nous calculons les invariants rigides relatifs pour les hypersurfaces rigides 2-non-dégénérées de rang de Levi constant 1 dans ℂ³: V₀, I₀, Q₀ ayant 11, 52, 824 monômes au numérateur. (3) Nous organisons tous les modèles affinement homogènes non-dégénérés dans ℂ³ en branches inéquivalentes. (4) Pour un courant harmonique dirigé autour d'une singularité linéarisée non-hyperbolique qui ne charge pas les séparatrices triviales dont l'extension triviale à travers 0 est ddc
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11

Ferré, Amelie. "Etude des dynamiques moléculaires sondées par générations d'harmoniques d'ordres élevés." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0165/document.

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Grâce à ses propriétés (cohérence, brillance, durée), le rayonnement XUV femtoseconde produit par génération d'harmoniques d'ordre élevé est utilisé comme un processus de sonde pour l'étude de dynamiques atomiques et moléculaires, avec une bonne résolution spatiale et temporelle (femtoseconde voire attoseconde). Ainsi, des dynamiques rotationnelles ont été résolues sur des petits systèmes moléculaires (N2, CO2). Les travaux de cette thèse ont consisté à étendre les méthodes de spectroscopie harmoniques et les appliquer à des systèmes moléculaires complexes d'intérêt femtochimique. Parmi elles,
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12

RICCI, ALESSANDRO MARIA. "Superconducting magnets for future accelerators." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1002038.

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The Large Hadron Collider (LHC) at CERN, which is now in operation for ten years, is not only the largest and more powerful particle accelerator in the world, but also constitutes one of the greatest applications of the superconducting magnet technology. Nevertheless, the need to increase both the luminosity in the next future and the energy in more far future is demanding for the developments of new and more challenging superconducting magnets generating higher magnetic fields. Presently all laboratories worldwide involved in the superconducting magnet technology for accelerators are performi
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13

Harroue, Benjamin. "Approche bayésienne pour la sélection de modèles : application à la restauration d’image." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0127.

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L’inversion consiste à reconstruire des objets d’intérêt à partir de données acquises au travers d’un système d’observation. Dans ces travaux, nous nous penchons sur la déconvolution d’image. Les données observées constituent une version dégradée de l’objet, altéré par le système (flou et bruit). A cause de la perte d’informations engendrée, le problème devient alors mal conditionné. Une solution est de régulariser dans un cadre bayésien : en se basant sur des modèles, on introduit de l’information a priori sur les inconnues. Se posent alors les questions suivantes : comment comparer les modèl
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14

Yeung, Carman. "Investigation of Linear and Nonlinear Torsional Guided Waves in Hollow Circular Cylinders for Damage Detection." Thesis, 2021. http://hdl.handle.net/2440/130216.

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Non-destructive testing plays an important role in structural health monitoring. One of the promising options is the use of guided wave for damage detection in engineering applications, such as pipeline and truss system. Common types of damage in the structures include cracks and corrosion. Guided wave is sensitive to cracks up to micro scale. Long range inspection is the other benefit of using guided wave. The overall aim of this thesis is to present a systematic investigation of guided wave in pipe-like structures to gain physical insights into linear and nonlinear features associated with t
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15

Liao, Haw-Ting, and 廖浩廷. "Fingerprint recognition with circular harmonic function." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/27449301449281025513.

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16

Huang, Jen-Ting, and 黃任廷. "Isolated, Circularly-Polarized, High Harmonics Generation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/f7tyru.

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17

HUANG, SHENG-YANG, and 黃勝暘. "Microstrip-Fed Circular Ring Slot Antennas with Wideband Harmonic Suppression." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/q7wcns.

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碩士<br>逢甲大學<br>電機工程學系<br>106<br>Recently, it is a prerequisite requirement for hand-held communication products to possess the advantages such as light in weight, compact size and low manufacturing cost. To satisfy these requirements, a single structure design that comprised of an antenna integrated with the front-end circuit of the communication system is presently attracting many attentions. However, high order harmonic modes excited by the antenna can cause electromagnetic interference (EMI) problems on the active circuit, which lead to degrading the performances of the system. Hence, the co
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18

Yo, Tzong-Chee, and 尤宗旗. "The Wireless PoweringCharging System with Harmonic Rejection and Circular Polarization Rectenna." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/45529877410711633048.

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博士<br>國立成功大學<br>電機工程學系碩博士班<br>96<br>In this dissertation, a RF power charging methodology is developed to provide ultimate power supply of wireless sensors in long term operation with rechargeable battery. Based on the FCC (Federal Communication Commission) regulation of the limited permissible exposure radiation density for public, the battery recharging procedure is accomplished by directly connecting to the rectenna without an additional voltage regulator. To achieve this, the input voltage promoting techniques are adopted by combining voltage transformation and voltage booster to overcome
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19

SHEM, HOU-TING, and 沈厚廷. "Finite Element Analysis for Double-Circular-Arc Stress Harmonic Drive With Helical Gear." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9u486d.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>107<br>Harmonic Drive is important in modern invention. The common tooth type is spur gear in Harmonic Drive industry at present. By many studies, the helical gear is smoother, longer life, heavier load, and less noise than the spur gear. And it is used widely in high-precision requirements. It can extend the transmission life, increase load capacity and reduce the number of replacement, that the harmonic gear combined with helical gear. This paper uses the SOLIDWORK to construct the model and used ANSYS to analyze the Von Mises stress and strain, and set the Young
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20

LIN, CHIH-HENG, and 林志衡. "Coplanar Waveguide-fed Circularly Polarized Antennas with Wideband Harmonic Suppression." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/u2gp8u.

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碩士<br>逢甲大學<br>電機工程學系<br>106<br>This paper focuses on new type antennas of harmonic suppression with circular polarization. The π-shape resonator can be used to suppress the high-order frequency. They can be applied to wireless local area networks WLAN 5.8 GHz (5.725 GHz to 5.825 GHz) and DSRC 5.9 GHz (5.85 GHz to 5.925 GHz). A coplanar waveguide-fed circularly polarized antenna with harmonic suppression is initially proposed (proposed antenna 1). The antenna size is 30 mm× 30 mm× 0.762 mm. By adding two quadrant arc-shaped perturbed elements into the circular patch antenna, a circularly polari
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21

林辰彥. "Vibration induced by harmonic loadings applied at circular rigid plate on layered half-space medium." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/76236813452565858717.

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22

Tsai, Chi-Ying, and 蔡奇穎. "Analysis of Conjugate Range for Double- Circular-Arc and Common Tangent Profile of Harmonic Drive." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/858z3m.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>105<br>Conjugate range of harmonic drive have a great influence on gear transmission performance, it depends on the tooth profile, number of teeth, structure of flexspline, and so on. Therefore, conjugate parameters have an influence on conjugate range will be discussed in this thesis. In this thesis, staring form rack tool for manufacture of flexspline, according to the standard of double-circular-arc and common tangent profile, solving the equation of tooth profile of flexspline conjugate to rack tool by tooth profile normal raw. Constructing a complete meshing m
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23

Liang, Tsair-Chun, and 梁財春. "Optical pattern recognition using a composite 2-D symmetrical edge detection filter and circular harmonic filter." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/41949326936088438729.

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24

SHIH, MING-CHOU, and 施名洲. "Scattering Problem of a Vertical Transverse Isotropic Circular Cylindrical Cavity Subjected to Time-Harmonic Elastic Wave." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8r96d5.

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25

Tien, Ling, and 田翎. "The Design of Near-Field Coupled Circular Sector Microstrip Antenna Pair with Harmonic-Rejection for Wireless Power Transmission." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/cjqar8.

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碩士<br>國立臺北科技大學<br>電子工程系研究所<br>105<br>In this dissertation, a design of transmitting-receiving antenna pair in the near-field coupled for Wireless Power Transmission (WPT) is proposed. It can be applied in two different situations is near-field transmission and far-field transmission, respectively. In the near-field, by analyzing the field distribution and the reflector of the transmit-receive antenna pair within the reactive near-field region, the transmission coefficient of the proposed antenna pair can be optimized. On the other hand, the receiving antenna combined with the rectifier circuit
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26

Cheng, Yun-Hao, and 程雲豪. "Study on the Tooth Profile Design and Finite Element Analysis (FEA) of Harmonic Drives with Involute Profile and Double-Circular-Arc Profile." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/34774t.

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碩士<br>國立中央大學<br>機械工程學系<br>105<br>The purpose of this study is to analyze the meshing characteristics of harmonic drives (HD) with involute profile and double-circular-arc profile. Firstly, the 2-D mathematical model of flexsplines (FS) with involute tooth profile and double-circular-arc profile were developed by using respective rack cutter based on the theory of gearing. Then the engaging circular spline (CS) with conjugate tooth profile of FS was derived based on the enveloping theory and kinematic model of HD. Additionally, a mesh generation program was developed to discretize the FS based
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