Дисертації з теми "Curve radius"
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Tukuafu, Jesse Tipasa. "The Effects of Indoor Track Curve Radius on Sprint Speed and Ground Reaction Forces." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2348.
Повний текст джерелаKokeš, Ondřej. "Optimalizace vybraných návrhových prvků ČSN pro projektování pozemních komunikací." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227622.
Повний текст джерелаAryal, Prabin. "Optimization of geometric road design for autonomous vehicle." Thesis, KTH, Byggvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290030.
Повний текст джерелаStránský, Jakub. "Optimalizace vybraných návrhových prvků ČSN pro projektování pozemních komunikací." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227496.
Повний текст джерелаHuerter, Kimberly Jean Durumeric Oguz. "Non uniform thickness and weighted global radius of curvature of smooth curves." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/380.
Повний текст джерелаCleary, Daniel. "CURVED AND TIGHT RADIUS INSPECTION OF CARBON FIBER REINFORCED POLYMERS WITH ACOUSTOGRAPHY." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2390.
Повний текст джерелаHuerter, Kimberly Jean. "Non uniform thickness and weighted global radius of curvature of smooth curves." Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/380.
Повний текст джерелаBrucalassi, Anna. "Search for extra-solar planets with high precision radial velocity curves." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-173637.
Повний текст джерелаDie vorliegende Dissertation behandelt die Suche von extra-solaren Planeten mit der Radialgeschwindigkeits Methode und zwar sowohl in Bezug auf die dafür notwendige Instrumentierung als auch auf die Beobachtung. Die Arbeit ist in zwei Teile gegliedert. Im ersten Teil werden die vorgenommenen Verbesserungen des hochauflösenden Spektrographen FOCES beschrieben, der im kommenden Jahr am Wendelstein Observatorium installiert werden wird. Der zweite Teil handelt von der Suche nach Gasplaneten im offenen Sternhaufen M67.
Van, der Walt Marizelle. "Investigating the empirical relationship between oceanic properties observable by satellite and the oceanic pCO₂ / Marizelle van der Walt." Thesis, North-West University, 2011. http://hdl.handle.net/10394/9536.
Повний текст джерелаThesis (MSc (Applied Mathematics))--North-West University, Potchefstroom Campus, 2012
Brucalassi, Anna [Verfasser], and Roberto Philip [Akademischer Betreuer] Saglia. "Search for extra-solar planets with high precision radial velocity curves / Anna Brucalassi. Betreuer: Roberto Philip Saglia." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1059351056/34.
Повний текст джерелаSjödin, Hällstrand Andreas. "Bilinear Gaussian Radial Basis Function Networks for classification of repeated measurements." Thesis, Linköpings universitet, Matematisk statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170850.
Повний текст джерелаCiomber, Isabelle, and Roland Jakel. "Systematic Analysis and Comparison of Stress Minimizing Notch Shapes : Obtaining a stress concentration factor of Kt=1 without FEM-Code." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-141533.
Повний текст джерелаCircular (one-radius) fillets are known as state-of-the-art for reducing notch stresses at cross section transitions. The stress concentration factor Kt of such geometries can be read out from diagrams/tables given in the literature. However, the efficiency of stress reduction of circular notches is very limited. The goal of the work therefor is to present a method for the designer/analyst how to design non-circular notches/fillets just by using suitable Kt-diagrams without time-consuming and expensive FEM analyses. Kt-numbers of nearly one are possible, that means in the "notch" just the nominal stress appears and no stress concentration takes place. The presentation has two parts: Part one describes the working methods and software functions as well as software tools: Creo Parametric as fully-parametric CAD program and Creo Simulate as embedded p-FEM-tool from Parametric Technology Corporation (PTC) have been used. The second part describes the range of validity and the examined notch geometries: The one-radius fillet as state-of-the-art, the two-radii filet, the Baud-curve, the method of tensile triangles from Claus Mattheck, the standard elliptical fillet and the conical round as generalized elliptical fillet. A notch layout library is shortly presented that allows to design such fillets, that means exactly determine the notch geometry and the related stress concentration factor Kt
Patková, Aneta. "Dřevěná konstrukce planetária." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225552.
Повний текст джерелаBelhadi, M'hamed. "Étude de machines à réluctance variable pour une application de traction électrique : réduction des ondulations de couple et des efforts radiaux." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112185.
Повний текст джерелаThis report deals with switched reluctance motor by offering design solutions to the drawbacks of torque ripples and radial forces in the same time. Torque ripples reduce the user comfort and radial forces are the origin of noise. In the first part, an axial structure characterized by low radial force is analysed. Indeed, an axial configuration with two stators and one rotor is the most appropriate to replace the reference radial machine. Ones the rules of passage from one structure to another are established, the axial structure is then compared to the reference one. A first passage is made by keeping the same volume and a second one by sizing the axial machine with the same specifications as the radial one. In the second part, the work concerns the modification of radial structure of the reference machine and its optimization. Several modifications are proposed including a structure with a magnetic wedge which is the most efficient. Geometric optimization using genetic algorithm are then performed on operating points to remedy the both problems. In the end, several optimized structures are proposed. The choice of the most suitable machine can be done by making a compromise between the torque maximization, reducing its ripples and reducing radial forces
Teepakorn, Chalore. "Numerical simulation and experimental study of membrane chromatography for biomolecule separation." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10299/document.
Повний текст джерелаMembrane chromatography (MC) is an alternative to traditional resin packed columns chromatography. The solute mass transport in the membrane occurs in convective through-pores rather than in stagnant fluid inside the pores of the resins particles, which is limited by the slow diffusive transport. MC offers the main advantage of reducing diffusion phenomena, shorter residence time and lowered pressures drops, and thus, facilitates rapid purification of large quantities of molecules. A wide range of chromatographic membranes involving different molecules retention mechanisms (ion exchange, affinity, etc...) is now commercialized. Despite their success, the influence of the geometry of the membrane chromatography devices remains relatively unexplored from a theoretical point of view. This doctoral thesis is aimed to clarify some ambiguous points related to this technique
Darvish, Manoochehr [Verfasser], Christian Oliver [Akademischer Betreuer] Paschereit, and Stefan [Akademischer Betreuer] Frank. "Numerical and experimental investigations of the noise and performance characteristics of a radial fan with forward-curved blades / Manoochehr Darvish. Gutachter: Christian Oliver Paschereit ; Stefan Frank. Betreuer: Christian Oliver Paschereit ; Stefan Frank." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1070276693/34.
Повний текст джерелаSchiavon, Laurent. "Conditions de monotonie de la courbure pour les courbes et splines d'interpolation." Valenciennes, 2002. https://ged.uphf.fr/nuxeo/site/esupversions/ebd449f2-087e-4588-b4a1-bedcc9b86660.
Повний текст джерелаFor a curve, the curvature is a deciding geometric feature for its shape. For some applications of CAD (automotive, aeronautics), it is important to maintain monotone curvature along the curve we aim to modelize in order to obtain aerodynamic and aesthetic shapes. In this work, solutions are given via the cubic polynomial curves and the quadratic rational curves (conic segments) which are controlled by a set of points (and weights in the rational case)
Губар, Олексій Васильович, Алексей Васильевич Губарь, Alexei V. Gubar та Aleksey V. Gubar. "Обґрунтування норм улаштування та утримання колії для кривих з радіусами менше 350 метрів". Thesis, Видавництво Дніпропетровського національного університету залізничного транспорту імені академіка В. Лазаряна, 2011. http://eadnurt.diit.edu.ua/jspui/handle/123456789/757.
Повний текст джерелаUA: АНОТАЦІЯ. Дисертація присвячена обґрунтуванню норм улаштування та утримання колії для кривих з радіусами менше 350 м шляхом впровадження конструкції рейкових скріплень з можливістю складання та регулювання ширини колії у як в межах кругових, так і перехідних кривих для типових залізобетонних шпал. Розроблено математичну модель взаємодії рухомого складу і колії та програмне забезпечення, які дозволили в дисертації встановити раціональні обґрунтовані норми ширини колії та розробити технологію складання колії з залізобетонними шпалами. Надано методики суцільного і локального регулювання ширини колії зі скріпленням СКД65-Б. Отримані теоретичні й практичні результати використано в розробці конструкції колії на залізобетонних шпалах для кривих ділянок радіусом менше 350 м.
RU: АННОТАЦИЯ. Диссертация посвящена обоснованию норм устройства и содержания пути для кривых с радиусами менее 350 м путем внедрения конструкции рельсовых скреплений с возможностью устройства и регулирования ширины колеи как в пределах круговых, так и переходных кривых для типовых железобетонных шпал. Выполнен анализ материалов расследования сходов подвижного состава. Установлено, что основная часть сходов имеет место на станциях в кривых с радиусом менее 350 м при выполнении маневровых работ. В большинстве случаев сходили с рельсов локомотивы с трехосными тележками. Существующие на сегодня нормы ширины пути в кривых участках рассчитанны исходя из условий вписывания жесткой базы массового железнодорожного экипажа. Расчеты обоснования этих норм разрабатывались с учетом наличия, на то время, в вагонном парке длиннобазных двухосных вагонов и грузовых вагонов с трехосными тележками. При массовом внедрении железобетонных шпал норма ширины колеи на прямых и кривых при радиусе 300 м и больше на железобетонных шпалах установлена одинаковой, равной 1520 мм. Область применения железобетонных шпал ограничена величиной радиуса из-за необходимости обязательного расширения ширины колеи в кривых участках меньших радиусов. На сегодняшний день как на железных дорогах Украины, так и стран СНГ отсутствуют обоснованные нормы устройства пути на железобетонных шпалах в кривых участках пути с радиусами круговых кривых менее 350 м. Такие обоснования отсутствуют, в первую очередь, из-за того, что отсутствуют конструкции пути, которые отвечали бы требованиям для таких кривых, а именно возможностью устройства пути с заданной и обоснованной шириной колеи в пределах круговой кривой и обеспечения отвода расширения в пределах переходных кривых. Кроме того, такая конструкция должна предусматривать возможность регулирования ширины колеи, которая изменяется в процессе эксплуатации. Вопросом возможности внедрения железобетонных шпал в кривых участках с радиусами менее 350 м непрерывно занимались еще с 70-тых годов прошлого столетия. Как результат – в круговых кривых с радиусами от 200 м до 450 м было разрешено укладывать специальные железобетонные шпалы (типа Ш-6) с нормой ширины колеи 1535 мм, но опыт их эксплуатации оказался достаточно неудачным, из-за отсутствия как возможности регулирования ширины колеи, так и отсутствия возможности создания отвода ширины колеи в пределах переходных кривых. Автором разработана конструкция рельсовых скреплений для типовых железобетонных шпал (Ш-1, Ш-6), что дает возможность устройства и регулирования ширины колеи в кривых участках любого радиуса как в пределах круговых, так и переходных кривых. Эта конструкция прошла опытную эксплуатацию на сети железных дорог Украины и введена в постоянную эксплуатацию приказом Государственной администрации железных дорог Украины. В настоящее время при отсутствии длиннобазных двухосных вагонов и вагонов с трехосными тележками в вагонном парке и наличием разработанной автором конструкции, что позволяет собрать путь с шириной колеи до 1535 мм (1540 мм со шпалами типа Ш-6) появилась техническая возможность установления и регулирования ширины колеи в кривых, где необходимое ее расширение. Это вызывает необходимость обоснования норм устройства и содержания колеи для кривых с радиусами менее 350 м. О необходимости таких норм для железобетонных шпал в кривых участках пути с радиусами кривых менее 350 м свидетельствует количество деревянных шпал, уложенных в путь и которые могут быть заменены на железобетонные шпалы. Например, на Львовской железной дороге уложено 4 млн. 554 тыс. деревянных шпал что составляет 48 процентов от общего количества шпал, а на остальных железных дорогах доля деревянных шпал составляет от 22 до 30 % от их общего количества. Больше всего деревянных шпал имеют так называемые горные дистанции, где много кривых радиусом менее 350 м. Кроме того, фактический срок службы железобетонных шпал отвечает расчетному и складывает около 40 лет, а фактический срок службы деревянных шпал составляет около 7–7,5 лет, что в 2–2,5 раза меньше от расчетного. Основная причина сокращения срока службы связана с механическими повреждениями древесины в результате частых перешивок рельсовых нитей. По этой причине 33 процента деревянных шпал непригодны для дальнейшего использования. Кроме того, закупки деревянных шпал ограничены малым объемом предложений от поставщиков, из-за чего шпал катастрофически не хватает не только для проведения плановых, но и текущих ремонтов. Разработана математическая модель взаимодействия подвижного состава и пути и программное обеспечение, которые позволили в диссертации установить рациональные обоснованные нормы ширины пути и разработать технологию устройства и содержания пути с железобетонными шпалами. Полученные теоретические и практические результаты использованы в разработке конструкции пути на железобетонных шпалах для кривых участков радиусом менее 350 м и использованы в нормативно-техническом документе Укрзализныци «Инструкция по устройству и текущему содержанию пути со скреплениями типа СКД65» ЦП-0199.
EN: ANNOTATION. The present thesis grounds the standards of conformation and maintenance of track for curves with radiuses less than 350 m by introducing the rail clips device with the option of setting railway gauge within the ambit of both circular and transition curves for typical concrete ties. The mathematical model of interaction of rolling stock and track and the software that allowed setting properly grounded standards of railway gauge and developing the technology of conformation and maintenance of track with concrete ties are worked out in the thesis. Methods of general and local adjustment of railway gauge with the help of СКД65-Б rail clip are given. Theoretical and practical educts were used in the development of conformation of track with concrete ties for curves with radiuses less than 350 m.
Jaïdane, Nejmeddine. "Etude du transfert de charge entre des atomes de soufre et des protons." Paris 7, 1987. http://www.theses.fr/1987PA077121.
Повний текст джерелаZaghlool, Baher SalahElDeen Othman Ahmed. "Behaviour of three-dimensional concrete structures under concurrent orthogonal seismic excitations." Thesis, University of Canterbury. Civil Engineering, 2007. http://hdl.handle.net/10092/1177.
Повний текст джерела(9825794), Michelle Pearce. "Railway operational benefits from bogie rotation friction management: Numerical simulations of bogie dynamics." Thesis, 2006. https://figshare.com/articles/thesis/Railway_operational_benefits_from_bogie_rotation_friction_management_Numerical_simulations_of_bogie_dynamics/20341539.
Повний текст джерелаThe purpose of this project was to prove or disprove the hypothesis that wheel and rail wear, and incidents of wheel squeal increase with increasing bogie rotation friction, while decreasing bogie rotation friction leads to increased incidents of hunting and increased wheel and rail wear. Therefore for any given combination of factors (vehicle type, curve radius, wheel profile, etc) an optimal bogie rotation friction level should exist at which incidents of hunting and wheel squeal are eliminated and wheel and rail wear is minimised.
In order to test the hypothesis a literature review was first undertaken. The purpose of the review was to examine the results from previous similar projects and identify any areas that may be improved upon in order to achieve the most accurate results. As a result of the literature review the simulation vehicle model was designed. Past studies featured a three-dimensional wagon body with the centre bowl connection modelled as a single spring, or the centre bowl was modelled in isolation. However for this project the vehicle included a centre bowl connection modelled using centre plate springs evenly distributed across the top centre, and plate and rim friction on the centre bowl, radial bumpstops around the rim and a vertical restraint from the cotter pin. Additional features of the simulation vehicle model were friction wedges, in order to properly represent the damping present at the spring nest connection, and a non -circular top centre, to reflect the design currently used by QR (Queensland Rail).
The remainder of the project focussed on computer simulations of the vehicle model using different combinations of parameters (vehicle type, curve radius, wheel profile, centre bowl friction and loading condition) to examine the way that the vehicle behaviour responded. The vehicle response was determined by measuring the wheelset lateral position, wheelset angle of attack and wear index (calculated using creep force and creepage).
The first series of simulations were used to prove that the centre bowl friction levels could be determined using wayside monitoring equipment provided that particular conditions were met. Provided that the vehicle was travelling through an area of constant curvature (not in transition or tangent), in 75% of cases the centre bowl friction level to lateral position relationship was relatively linear. Therefore after initial studies to calibrate the system according to the curve radius and type of vehicle it would be possible to calculate the centre bowl friction using wayside monitoring equipment. However if the system was limited to curves with a radius larger than 800m, the accuracy of the system increased to 83% of cases following a linear relationship.
Little, Kenneth L. "Criticality for the radius of gyration of curves." 2004. http://purl.galileo.usg.edu/uga%5Fetd/little%5Fkenneth%5Fl%5F200408%5Fma.
Повний текст джерелаGuo, Bor Horng, and 郭柏宏. "Construction and Manipulation of Variable Radius Offset Curves." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/19109110768933394953.
Повний текст джерела中原大學
資訊工程研究所
83
Offsetting is a geometric operation which expands outline of a given object, it is one important method for applications of computer graphics, computer aided design (CAD), and image processing. In this paper, we firstly describe mathematic and differential properties of variable radius offset curve,and we also state the difficulty of constructing offset radius function for the design of variable radius offset curves in computer graphic applications. In order to design variable offset curve effectively and friendly, we present one method to slove the problem, via moving the control points of cubic Bzier curve to generate the radius offset funtion. The algorithm will be discussed for further analysis. Furthermore, we provide a method to directly manipulate the interior points of variable radius offset curves. By point to point,we can manipulate shape of variable radius offset curves freely. The advantages of conventional interpolation mathods are also kept in the method.
Lin, Syh-Yang, and 林賜緣. "Integrated Bezier curves Tangent to the Variable-Radius Circle." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/49670988797875462116.
Повний текст джерела東吳大學
資訊科學系
93
Informally, a geometric constraint problem consists of a (finite) set of geometric objects and a (finite) set of constraints between them. The geometric objects are drawn from a fixed universe such as point, lines, circles and conics in the plane. The constraints are logical constraints such as incidence, tangency, perpendicularity, etc., or metric constraints such as distance or angle. There are two problems we want to solve in this work. The first problem is to find the variable radius circle tangents to 3 geometric objects, such as point, line, circle, and Bezier curve. The second problem is to solve the cluster merge problem whose geometric objects are point, circle, line, and Bezier Curve. For solving first problem, the cyclographic for the geometric objects (points, circle, line, and Bezier curve) has to be surveyed. Based on the fact that the cyclographic maps of Bezier curve have no implicit form, the approximation for the maps should be constructed. After we construct the cyclographic maps for 3 geometric objects, and find their intersection points (x,y,z), we find the variable radius circle centered at (x,y) with radius z, tangent to those 3 geometric objects. For the second problem, we extend the cluster merge problem to the problem containing Bezier curve as the basic geometric objects. There are two constraints between the variable radius circle and each of the rigid geometric objects. We find the intersection points for 2 fixed geometric objects and 2 translational/rotational geometric objects. Next, we convert the voxel location (in volume space) back to point location (in geometric space). Finally we refine the variable radius circle centered at (x,y) with radius z, tangent to each of the rigid geometric objects.
Fourie, Daniël Johannes. "Mechanisms influencing railway wheel squeal excitation in large radius curves." Thesis, 2012. http://hdl.handle.net/10210/5334.
Повний текст джерелаSound pressure levels exceeding acceptable limits are being generated by trains travelling on the 1000 m radius curved railway line past the town of Elands Bay. Unacceptable sound levels are attributed mainly to top of rail wheel squeal. Top of rail wheel squeal belongs to the family of selfinduced vibrations and originates from frictional instability in curves between the wheel and the rail under predominantly saturated lateral creep conditions. In small radius curves, saturated lateral creep conditions occur due to the steering of railway wheelsets with large angles of attack. Given the large curve radius and the utilisation of self-steering bogies on the Sishen-Saldanha Iron Ore railway line, curve squeal is a highly unexpected result for the 1000 m radius curved railway line. This is because curving of bogies in large radius curves are achieved without high wheelset angles of attack leading to saturated creep conditions. An experimental and analytical investigation was carried out to identify the mechanisms influencing the generation of wheel squeal in large radius curves. Simultaneous measurement of sound pressure and lateral wheel-rail forces were made during regular train service in one of the two 1000 m radius curves at Elands Bay to characterise the bogie curving behaviour for tonal noise due to wheel squeal occurring in the large radius curve. The lateral force curving signature not only reveals the levels of lateral wheel-rail forces required for bogie curving, but also whether the bogie is curving by means of the creep forces generated at the wheel-rail interface only or if contact is necessitated between the wheel flange and rail gauge corner to help steer the bogie around the curve. The test set-up consisted of two free field microphones radially aligned at equivalent distances towards the in – and outside of the curve in line with a set a strain gauge bridges configured and calibrated to measure the lateral and vertical forces on the inner and outer rail of the curve. This test set-up allowed the squealing wheel to be identified from the magnitude difference of the sound pressures recorded by the inner and outer microphones in combination with comparing the point of frequency shift of the squeal event due to the Doppler Effect with the force signals of the radially aligned strain gauge bridges. From the experimental phase of the investigation, it was found that wheel squeal occurring in the 1000 m radius curve at Elands Bay is characteristic of empty wagons and is strongly related to the squealing wheel’s flange/flange throat being in contact with the gauge corner of the rail. Here high levels of spin creepage associated with high contact angles in the gauge corner lead to high levels of associated lateral creepage necessary for squeal generation. This is in contrast to lateral creepage due to high wheelset angles of attack being the key kinematic parameter influencing squeal generation in small radius curves. Furthermore, the amplitude of wheel squeal originating from the passing of empty wagons was found to be inversely proportional to the level of flange rubbing on the squealing wheel i.e. increased flange contact on the squealing wheel brings about a positive effect on squeal control. Contrary to the empty wagons which are characterised by tonal curve squeal, loaded 4 wagons requiring contact between the wheel flange and rail gauge corner in the 1000 m curve was characterised by broadband flanging noise. It was concluded from measurements that flange contact occurring under high lateral forces for steady state curving of loaded wagons provides the complete damping necessary for squeal control. The curve squeal noise that originated from the passing of empty wagons in the Elands Bay curve could further be classified according to the frequency at which the squeal event manifested itself in the curve, i.e. low frequency audible (0 – 10 kHz), high frequency audible (10 – 20 kHz) and ultrasonic squeal (> 20 kHz). The vast majority of low frequency audible squeal events recorded in the 1000 m Elands Bay curve occurred at approximately 4 kHz and originated from the low rail/trailing inner wheel interface, whilst the vast majority of high frequency audible squeal events occurred in the frequency range between 15 and 20 kHz and originated from both the high rail/leading outer wheel and low rail/trailing inner wheel interfaces.
Quaium, Ridwan B. "A Comparison of Vehicle Speed at Day and Night Rural Horizontal Curves." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8024.
Повний текст джерелаHo, Cheng-Hsuan, and 何承軒. "Using Radial Basis Function Neural Network to Build the Rating Curve of Irrigation Channel." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/a34448.
Повний текст джерела國立臺北科技大學
土木工程系土木與防災碩士班
106
Agricultural farming in Taiwan has always been dominated by paddy fields, which is the main target of irrigation for the irrigation channels. The irrigation channels are spread throughout the planting of rice in Taiwan. If we can understand the rating curve of each channel, it is possible to adjust the flow of each channel to correspond to the amount of water needed for agricultural activities through the water conservancy facilities. Thereby reducing the waste of water resources. Therefore, it is an important goal to investigate the details of each channel. How to effectively and quickly obtain the required measurement data and establish a reliable rating curve in a large number of irrigation channels throughout Taiwan is the goal of this study. However, if the rating curve is to be perfected in the discharge measurement process, it is necessary to measure the flow field distribution under each water level as much as possible to calculate the velocity. Therefore,to construct a complete rating curve, multiple measurements are required to achieve Therefore, this study uses the Radial Basis Function Neural Network (RBFNN) model to train and characterize the parameters of the neural network only with the part of measured data, and the remaining data is used for verification. Very good results were obtained in the verification. The network constructed by this parameter is used to simulate the velocity distribution under each water level condition, and the velocity calculation is performed, and the velocity data construction rating curve calculated by the simulation result is performed, and then comparing with the rating curve established by the original measurement data.
Huang, Zhen Sheng, and 黃振聲. "A Study of Coupler-Curve Synthesis of Four-Bar Linkages Using Radial-Basis-Function Neural Networks." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/63237520113532885800.
Повний текст джерела國立中正大學
機械系
87
The purpose of this paper is to propose a methodology to synthesize a four-bar linkage with a desired coupler curve. In this method, four control points are defined to determine the shape of the desired coupler curve. By employing a radial-basis-function neural network, a coupler curve generator is established to relate the control points to the size of the four-bar linkage. When one of the control points is moved, the shape of the coupler curve will be changed and the corresponding four-bar linkage well be generated. In this paper, four control points of a coupler curve is defined based on the symmetry and divide equally characteristics. Next, according to Grashof’s criterion, the range of the length of links is determined to classify the linkages into several types. In each type, various linkages with different sizes are generated to produce their coupler curves and the corresponding control points. The sizes and the control points form training pairs for the RBF neural network. Finally, the computer program for the RBF neural network is implemented in the PC Window environment by C++ computer language. This paper provides a novel approach for the generation of the coupler curves. Using an RBF neural network as a core, the coupler curve generator is compact and efficient. The results of this paper are beneficial to the dimensional synthesis of linkages.
Wang, Ting-hua, and 王廷華. "PREDICTION BY MOVABLE-RATE GRADIENT RADIAL BASIS FUNCTION NEURAL NETWORK WITH FUZZY CURVES." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/25051127833995293341.
Повний текст джерела大同工學院
電機工程學系
85
This thesis will provide a faster and simpler radial basis function neuralnetwork from an efficient classifier, a variable learning and a gradient algor-ithm. Its advantage is that we know nothing about the system unless its input-output pairs and use less time learning well. The fuzzy-side view will help usfind the character more simply and quickly. The proposed method will further improve the power and/or the speed of the learning of the Neural Network whichis not bounded with smooth system. In examples, we will know that it can be used in the predict problem very well with both stationary and nonstationary time series. In the similar way, we can still use this proposed method in otherinput-output pairs' problem.
VOTRUBOVÁ, Jitka. "Proč nezemřela paní Curieová na akutní nemoc z ozáření?" Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-364554.
Повний текст джерелаBerg, Sarah A. "Nicotine Use in Schizophrenia: a part of the cure or the disease?" Thesis, 2012. http://hdl.handle.net/1805/2742.
Повний текст джерелаNicotine use among individuals with schizophrenia occurs at extremely high rates. The prevailing theory is that individuals with schizophrenia smoke as a form of self-medication to ameliorate sensory and cognitive deficits. However, these individuals also have enhanced rates of addiction to several drugs of abuse and may therefore smoke as a result of enhanced addiction liability. The experiments described herein explored these two hypotheses by assessing the effect that nicotine has on working memory, addiction vulnerability (locomotor sensitization and self-administration), and nicotinic acetylcholine receptor (nAChR) expression as well as the developmental expression of these characteristics in the neonatal ventral hippocampal (NVHL) neurodevelopmental animal model of schizophrenia. The results from these studies indicate that NVHLs had working memory impairments in both adolescence and adulthood, with nicotine having a negligible effect. Additionally, NVHLs displayed enhanced locomotor sensitization to nicotine which emerged in adulthood as well as an enhanced acquisition of nicotine self-administration, administering more nicotine overall. These behavioral differences cannot be attributed to nAChR expression as nicotine upregulated nAChR to a similar extent between NVHL and SHAM control animals. These data indicate that the enhanced rates of nicotine use among individuals with schizophrenia may occur as a result of an enhanced vulnerability to nicotine addiction.
Schroeder, Moritz. "Vergleichende Studie der Effektivität vier verschiedener Spültechniken zur Entfernung von Kalziumhydroxid aus einem gekrümmten Wurzelkanalsystem." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-EFEF-9.
Повний текст джерелаSchreiber, Anja. "Die Methode von Smolyak bei der multivariaten Interpolation." Doctoral thesis, 2000. http://hdl.handle.net/11858/00-1735-0000-0006-B37B-B.
Повний текст джерелаHamza, Syed Muhammad Farrukh. "Shear-enhanced permeability and poroelastic deformation in unconsolidated sands." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6353.
Повний текст джерелаtext