Dissertations / Theses: 'Radar – Research'

1

Hulsey, Amber Lee. "Human Trafficking| Flying under the Radar." Thesis, The University of Southern Mississippi, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10752077.

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The global hegemon, the United States encompasses roughly 57,000 to 63,000 of the roughly 45.8 million slaves present across the world today (Walk Free Foundation 2016a). This dissertation research uses the theoretical lens of Human Security as a unique approach in that it is people-centered, focusing on the individual, rather than the more traditional theories in international relations that emphasize the state as the central actor. This dissertation focuses on the understudied area of human trafficking into and within the United States. More specifically, the objective of this research examines the movement of trafficked persons via air and details actions to be taken to combat human trafficking.

Although the world relies upon aerial commerce to enable globalization and interdependence, these same transportation systems and flows that carry persons and goods for legal commerce and trade can also be used as an avenue for illegal commerce, including trafficking of human. Thus, the researcher surveyed aviation personnel in various sectors of the industry, government organizations, non-government organization and victims/survivors via an online survey platform and utilized social media to reach potential survey participants. The sample size used for this study was 10,065 and the study received 578 participants.

The data collection procedures and results used in this dissertation were designed to identify gaps in security safeguards that further enable human trafficking via aircraft. The author presents strategies that can be adopted to reduce, if not eliminate, human trafficking into and within the United States via air. The researcher identified eleven opportunities for future research and discusses the limitations. The studied reveals seven key findings: definition of human trafficking is not known in totality, the level of human trafficking awareness, the number of human trafficking cases identified, the characteristics of the typical respondent, aviation sectors place a slightly different areas of emphasis of human trafficking that is understudied, understudied areas of human trafficking were different than that of the typical respondent, and the absence of human trafficking regulations and training. Finally, the study introduces a comprehensive-holistic human trafficking training curriculum entitled, “Operation Safe House: Human Trafficking Training for Aviation Professionals.”

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2

Celebi, M. bahadir. "Radar Emitter Emulation For Research And Experimental Purposes." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610847/index.pdf.

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The scope of this thesis is to implement radar emitter emulator in a low cost, portablehardware for operational and educational purposes. The model enables pulse train generation in real environment belonging to radar emitters for military exercises. The motivation comes from another research area which is to design effective algorithms for deinterleaving mixed pulse sequences in a suitable hardware and this thesis, covers the work done for implementing a hardware that generates mixed pulse sequences. First of all, a basic radar emitter model is built up using laboratory instruments by considering basic radar emitter models. Technical specs of these instruments have to be known well to find out how many emitters can be emulated simultaneously and what the limits of these emulations are. After giving emulation results, trigging signal generator externally to obtain complex mixed pulse sequences is mentioned. In the following section related schematics are given about implementing radar emitters. Cost efficient way of emitter emulation is mentioned by using wideband RF synthesizer/VCO with integrated RF mixers and some microwave components in the following section. A board is designed including all required components to implement radar emitter emulation. Tests are implemented in laboratory environment. Finally test results and technical specifications of the design are given. Also cost calculations of the implemented designs are done in the final section and some examples related to the use of emulators in environmental scenarios are given. Future work is also explained again in this final section.

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3

Vandepeer, Brenton. "A new mf Doppler radar for upper atmospheric research /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phv2273.pdf.

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4

Riedl, Grant H. "Advanced research into moving target imaging using multistatic radar." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FRiedl.pdf.

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Thesis (M.S. in Applied Physics)--Naval Postgraduate School, December 2009.
Thesis Advisor: Borden, Brett. Second Reader: Walters, Donald. "December 2009." Description based on title screen as viewed on January 29, 2010. Author(s) subject terms: Moving Target Imaging, multistatic radar, computer simulation. Includes bibliographical references (p. 31). Also available in print.

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5

Carroll, Christopher S. "Advanced research into imaging of moving targets." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FCarroll.pdf.

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Thesis (M.S. in Applied Physics)--Naval Postgraduate School, December 2009.
Thesis Advisor(s): Borden, Brett. Second Reader: Walters, Donald. "December 2009." Description based on title screen as viewed on January 29, 2010. Author(s) subject terms: Radar imaging, moving targets, point-spread function. Includes bibliographical references (p. 57). Also available in print.

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6

Friberg, Carol Diane. "Preliminary processing and evaluation of radar measurements in satellite-path propagation research." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/45722.

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Rain and other precipitation cause attenuation and depolarization of high frequency satellite signals. Some characteristics of rain can be measured by dual-polarized radar. These characteristics can then be used to predict the effects of the rain on satellite-path propagation. This thesis describes briefly the theory of radar and satellite link measurements. Methods for calibrating the equipment and deriving actual experimental values from measured power are presented in detail. A set of computer programs to approximately predict radar and link values from measured rain rate are developed. Predicted and measured values may then be compared by a researcher to evaluate system operation and assess the importance of the event data. A discussion of the use of sampled data and these comparisons concludes the report.
Master of Science

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7

Sweeney, Dennis. "Measurement and validation of rainstorm parameters with the VPI radar." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94477.

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This paper presents a broad overview of the equipment and rational of the experiment conducted by the VPI Satellite Communications Group under INTELSAT Contract 433. The object of this experiment is to assess the validity of meteorological radar as a predictor of satellite earth-space path fade statistics. To validate the data collected by the VPI radar for this experiment, the differential reflectivity (ZDR) measured during the November 29-30, 1985 rainstorm is compared with calculated ZDR and ZDR from published plots. The special hardware and calibration techniques required for this experiment are also described. An IBM-PC controlled antenna pointing system and a system to continuously monitor both the peak and average power of the radar transmitter are included. Also included is a calibration system for the radar receiver. A simple computer program is developed which will give the radar cross section of a metal sphere. This sphere is used as a calibrated radar target.
M.S.

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8

McLaughlin, Mike. "Coaching for brave leadership : an action research study." Thesis, Oxford Brookes University, 2012. https://radar.brookes.ac.uk/radar/items/0c6b9480-39ad-43d9-91bc-e2c6c7cf849d/1.

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Even though there is a plethora of leadership training and coaching available worldwide, there appears to be a disparity between articulated best practice and some of the reported negative experiences of individuals within organisations. There appears to be a gap between the behaviours of leaders and the expectations of followers. This gap may be due, at least in part, to an absence of brave leadership, and also perhaps due to a lack of one to one coaching for leaders. In this study a small group of leaders helped develop and explore a coaching model designed to enhance bravery. An action research approach was undertaken with six leaders who undertook to help evolve and also be coached using this particular coaching model. The action research took place over a six month period in various locations within the U.K. The data was analysed using a retroductive and thematic approach. The use of this model appears to indicate that it can assist in decision making and that bravery may be enhanced, at least from a subjective perspective. It would also appear that the idea of brave leadership may complement other leadership theories. However, more work should be done to adapt and refine the model for use in different circumstances. Furthermore, it should also be explored more thoroughly in a purely coaching environment rather than one where research into the model is also being conducted.

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9

Billings, Don, Mei Wei, Joseph Leung, Michio Aoyagi, Fred Shigemoto, and Rob Honeyman. "REAL-TIME INTEGRATION OF RADAR INFORMATION, AND GROUND AND RADIOSONDE METEOROLOGY WITH FLIGHT RESEARCH DATA." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607368.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California
Although PCM/TDM framed data is one of the most prevalent formats handled by flight test ranges, it is often required to acquire and process other types. Examples of such non-standard data types are radar position information and meteorological data from both ground based and radiosonde systems. To facilitate the process and management of such non-standard data types, a micro-processor based system was developed to acquire and transform them into a standard PCM/TDM data frame. This obviated the expense of developing additional special software and hardware to handle such non-standard data types.

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10

Johansson, Gustav. "Beamforming and timing design issues for a large aperture array radar applied to atmospheric research /." Luleå : Department of Computer Science and Electrical Engineering, Luleå University of Technology, 2009. http://pure.ltu.se/ws/fbspretrieve/2962363.

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11

Alifrangis, Spyridon Mathew. "Development of an algorithm for the detection of coherency in radar signal waveforms." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/45963.

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The estimation of the stability of radar emissions is of considerable interest in the evaluation of radar clutter rejection performance and also for the general knowledge of the waveform required for the design of threat simulators. It should be stressed that for the estimation of clutter rejection capability, it is the stability of the entire waveform that is of general importance, although the stability of parameters such as phase, Pulse Repetition Interval (PRI) and amplitude are typically specified because of the ease in instrumenting the measurement. The parametric estimates are indeed the most useful in describing the characteristics of the waveform but not necessarily for evaluating clutter rejection performance.

Two broad categories into which radar emissions can be subdivided are coherent and non-coherent RF. A great deal of confusion often surrounds the use of these terms, especially among those who measure radar emissions rather than those who build the radar sets. For the purposes of this paper, coherence will be defined in terms of the square root of the variance of the first pulse-to-pulse phase difference, Ï (Î Î¸ ). For the case where Ï (Î Î¸) << 1 radian, the signal will be considered coherent. When the phase is uniformly distributed over 2Ï radians, the signal will be considered nonâ coherent. Since it is likelythat, for most practical signals, the signal will be well within one of these two categories, ambiguity will be unlikely.

If a radar emission is observed to be coherent, it implies that the radar uses this property for Moving Target Indication (MTI) processing. The performance of the MTI will probably, but not necessarily, depend on the pulse-to-pulse phase stability as the most critical parameter for this type of system. Altematively, if the radar emission is observed to be non-coherent, it implies that if the radar has an MTI processor, it is likely that it is of the stored reference variety. The performance of the MTI will probably, but again not necessarily, depend on the pulse-to-pulse RF stability as the most critical parameter.

The common thread between the two types of systems which indicates clutter rejection performance is the repeatability of adjacent pulse waveforms regardless of phase. This is not to imply that phase is not critical; it is important for determining the type of processor. The difference lies in the fact that for the intemally coherent system, the phase information of the coherent reference oscillator is not observable as it is for the extemally coherent system. Hence, the only hint that such an emitter has an MTI processor is contained in the repeatability of adjacent pulse waveforms.

This paper addresses the general problems of detecting coherence, estimating MTI performance, and esrimating the phase stability, frequency stability and PRI stability using sample data derived from a system based on the IBM-PC. Both the analysis and radar waveform generation systems were implemented in software utilizing Microsoft Fortran and Microsoft C compilers.

Master of Science

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12

Lu, Xiao Feng. "Simulation of the upper Waimakariri River catchment by observed rain & radar reflectivity." Lincoln University, 2009. http://hdl.handle.net/10182/1161.

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ModClark and Clark’s Unit Hydrograph (Clark’s UH) within HEC-HMS software are distributed and lumped models, respectively. Clark’s UH simulates the transformation and attenuation of excess precipitation, and requires time of concentration (Tc) and Storage Coefficient (R) parameters. ModClark transformation accounts for variations in travel time to catchment outlet from all regions of a catchment, and it additionally requires gridded representation of a catchment and Gridded cell-based input files. Four cases (three from observed rain, and one from radar reflectivity) of three chosen events were specifically chosen and examined for the comparison of simulation results with the same estimated initial parameters apart from different rainfall inputs. The Upper Waimakariri River Catchment was divided into ten subcatchments, and the HEC-HMS basin model parameters were estimated by using the physical/hydrological characteristics. However, ModClark transformation was unavailable because of an output error from converting ASCII to gridded Soil Conservation Service Curve Number (SCS CN) format by the conversion tool – ai2dssgrid.exe. Therefore, Mean Aerial Precipitation (MAP) for each subcatchment was calculated by Thiessen polygon method combined with an overlay analysis for grid-cell-based rainfall estimation from radar with geographic information system (GIS) tools. The automated calibration/optimisation procedure included in HEC-HMS package was applied to the cases which showed a deviation between simulation and observed flows. The purpose is to ‘optimise’ the initial estimates of parameters only in a mathematical-fit manner based on the observed flows from the only discharge gauge at Old Highway Bridge (OHB). The TC values calculated from the five equations vary in a relatively narrow range apart from the one from Bransby-Williams equation. Therefore, the values from all the other four equations were averaged and used as the initial TC input. The simulation results showed that there was a notable difference between observed and simulated hydrographs for some case studies even though TC, R, CN, and lag time were calibrated/optimised separately. Also, radar estimated rainfall and grid-based data storage system (DSS) need more investigations.

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13

Scott, Ian R. "Coaching for gravitas : an action research inquiry into the development of gravitas in leadership." Thesis, Oxford Brookes University, 2016. https://radar.brookes.ac.uk/radar/items/cbb34c4e-3b89-4d28-a3ac-71283a685312/1/.

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This study aims to develop a theoretical and practical model of coaching for gravitas in a business leadership context. Gravitas is described as a psychological phenomenon and concept used frequently, but not well researched and understood. While leadership practitioners frequently refer to gravitas as a desirable quality, there have been no specific empirical studies into gravitas as either a leadership quality or more general phenomenon. A review of the literature specifically associates gravitas with the leadership concepts of authenticity and charisma, which are often discussed together with the concepts of power and authority. The role of followers is described as important in all leaders’ qualities, but the context of a leader’s organisation is a frequent omission in typical studies. A collaborative action research approach was adopted with six practising leaders and 12 of their followers from one organisation. An initial model of coaching for gravitas was developed and four cycles of action research were conducted over a 12-month period. The first action research cycle used a conceptual encounter method to create a conceptual model of gravitas that was specific for the six leaders coached during the next three cycles of research. The evolved conceptual model described gravitas through four dimensions of confidence, courage, communication, and control. Under each dimension, potentially coachable elements were identified and explored in action with the participants over subsequent research cycles. Specific coaching methods were used to develop these elements. A wide range of data was collected and analysed using thematic analysis. The findings suggested that situational forces on individual gravitas constantly moved and that the model of an individual’s gravitas was therefore always changing. The leaders learned how to recognise these forces and use them for focusing their attention. In spite of individual differences, the embodied reactions of leaders to the reported feelings of gravitas showed significant similarities. A weight and stillness of the body and mind was connected to the ability to see clearly in changing situations involving complex forces in action. Recognition of these feelings enabled an active use of them in practice. Participants described reflective processes within the action research as the most informative part of the coaching process. The journey of the participants and researcher was translated into a mapped process allowing development of a model of gravitas useful for recognition in themselves and others. The study concludes with a number of implications for leadership theory and practice, suggesting that coaching can contribute to the development of leadership gravitas.

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14

Pollard, Kimberley Jeanne. "Study of slant path attenuation ratios derived from a dual-polarized radar." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040448/.

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Cook, Janice. "The effect of coaching on the transfer and sustainability of learning : coaching for leaders, a collaborative action research study." Thesis, Oxford Brookes University, 2011. https://radar.brookes.ac.uk/radar/items/ac8c8aca-b0a7-dce6-fca6-4e84cbe3e73e/1/.

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Coaching generally remains under-researched and in particular the transfer and sustainability of learning from coaching is extremely sparse in the field of empirical research and theoretical development. This qualitative research was conducted with four leaders from UK voluntary sector organisations, namely Advance, Mencap and Rethink. Within a social constructivist and interpretivist paradigm, this longitudinal study explored the findings of three action research cycles for a period of just over one year. An original approach to collaborative action research methodology was developed and utilised, combining the dual role of coach/researcher, the role of the leaders being coached as collaborative action researchers, research diaries data, and data from feedback provider sessions. The data emerging from the research diaries and the feedback provider sessions was analysed using a thematic analysis approach, with categories and themes identified which either help or hinder the transfer and sustainability of learning from the coaching sessions to outside that experience. The ethical challenges of this newly developed approach to collaborative action research were also identified and analysed. The emergent Collaborative Action Coaching for Leaders model comprises six categories made up of thirty-three themes: Client Centred Process (eight themes), Enabling/Facilitating Learning (six), Session Content (two), Active Learning (five), Coaching Relationship (eight), and Reflective Learning (four). The study found that the transfer and sustainability of learning outside the coaching experience is encouraged by the coach and the client having both individual and shared responsibilities. The coach has responsibility for tailoring the coaching to each individual client and for enabling and facilitating learning; the client has responsibility for the content of the coaching sessions and for active learning; and both the coach and the client have shared responsibility for the coaching relationship and reflective learning. Within the approach there are factors which both help and hinder the transfer and sustainability of learning, although the data is heavily weighted towards the factors which help. It is clear from the emerging data across the three action research cycles, that it is the combination of all six categories (and the thirty-three themes) which over time enable the transfer and sustainability of learning; there does not appear to be any weighting of a specific category or theme. There are two main findings from the study: coaching can help the transfer and sustainability of learning; and both the coach and the client have individual and shared responsibilities in the transfer and sustainability of learning from the coaching sessions to outside that experience. The Collaborative Action Coaching for Leaders model contributes to the coaching profession, providing an evidence-based coaching model for coaches to explore through use in their professional work with leaders in organisations. The study findings add to the theoretical knowledge of coaching and inform future coaching research into the transfer and sustainability of learning from the coaching experience.

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McAuley, Trudy Dee. "Towards a pragmatic and evidence-based approach to the assessment of group work in undergraduate courses : an action research study." Thesis, Oxford Brookes University, 2009. https://radar.brookes.ac.uk/radar/items/05254c04-530b-4953-8d98-5b4c736af853/1/.

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This action research study focuses on students' perceptions of group work and its assessment. The research records a four-year study involving 729 first, second and third year undergraduate students. Having started with an exploration into students' perceptions of group work, it identified social loafing as students' key concern, explored ways to alleviate the problem, presented students with a range of options and ended with an examination of students' perceptions of the formative and summative peer assessment process they chose to implement. Research was undertaken using a mixed model design referred to as "intramethod mixing" by Johnson and Turner (2003, p. 298). This involved the concurrent and sequential use of a single method (questionnaires) that included both qualitative and quantitative components. As a result of the research a pragmatic and evidence-based approach to the assessment of group work on undergraduate courses is suggested. Also six overarching themes emerged: • Group work as a social activity that can foster the development of a community of practice. • Students' lack of knowledge of how to work in groups and need for relevant training. • Students' dislike of receiving one group mark for group work. • Tension between fairness, transparency and validity when peers summatively assess peers' contribution to group work. • The role of formative peer assessment (which should remain anonymous) in assessment as learning. • Tension between the delegation of control over the assessment process and the tutor's role as assessor.

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17

Repass, Lawrence M. "Optimal stationing of radar pickets and anti-ballistic missile defenders for long range surveillance and tracking (LRS & T) and ballistic missile defense (BMD) operations." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FRepass.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 2006.
Thesis Advisor(s): Gerald Brown. "September 2006." Includes bibliographical references (p. 51-52). Also available in print.

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18

Otosaka, Inès. "A Historic Record of Sea Ice Extents from Scatterometer Data." Thesis, KTH, Geoinformatik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-205237.

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Sea ice is a vital component of the cryosphere and does not only influence the polar regions but has a more global influence. Indeed, sea ice plays a major role in the regulation of the global climate system as the sea ice cover reflects the sun radiation back to the atmosphere keeping the polar regions cool. The shrinkage of the sea ice cover entails the warming up of the oceans and as a consequence, a further amplification of the melting of sea ice. Therefore, the polar regions are sensitive to climate change and monitoring the sea ice cover is very important. To assess sea ice change in the polar regions, satellite active microwave sensors, scatterometers, are used to observe the evolution of sea ice extent and sea ice types. Thus, this research aims at creating a historic record of daily global Arctic and Antarctic sea ice extents and analysing the change in sea ice types with scatterometer data. A Bayesian sea ice detection algorithm, developed for the Advanced scatterometer (ASCAT), is applied and tuned to the configurations of the scatterometers on board the European Remote Sensing satellites, ERS\textendash 1 and ERS\textendash 2. The sea ice geophysical model functions (GMFs) of ERS and ASCAT are studied together to validate the use of ASCAT sea ice GMF extrapolated to the lower incidence angles of ERS. The main adaptations from the initial algorithm aim at compensating for the lower observation densities afforded by ERS with a refined spatial filter and time\textendash variable detection thresholds. To further analyse the backscatter response from sea ice and derive information on the different sea ice types, a new model of sea ice backscattering at C\textendash band is proposed in this study. This model has been derived using ERS and ASCAT backscatter data and describes the variation of sea ice backscatter with incidence angle as a function of sea ice type. The improvement of the sea ice detection algorithm for ERS\textendash 1 and ERS\textendash 2, operating between 1992 and 2001, leads to the extension of the existing records of daily global sea ice extents from the Quick scatterometer (QuikSCAT) which operated from 1999 to 2009 and ASCAT operating from 2007 onwards. The sea ice extents from ERS, QuikSCAT and ASCAT show excellent agreement during the overlapping periods, attesting to the consistency and homogeneity of the long\textendash term scatterometer sea ice record. The new climate record is compared against passive microwave derived sea ice extents, revealing consistent differences between spring and summer which are attributed to the lower sensitivity of the passive microwave technique to melting sea ice. The climate record shows that the minimum Arctic summer sea ice extent has been declining, reaching the lowest record of sea ice extent in 2012. The new model for sea ice backscatter is used on ERS and ASCAT backscatter data and provides a more precise normalization of sea ice backscatter than was previously available. An application of this model in sea ice change analysis is performed by classifying sea ice types based on their normalized backscatter values. This analysis reveals that the extent of multi\textendash year Arctic sea ice has been declining remarkably over the period covered by scatterometer observations.

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Bohleber, Pascal [Verfasser], and Olaf [Akademischer Betreuer] Eisen. "Ground-penetrating radar assisted ice core research : The challenge of Alpine glaciers and dielectric ice properties / Pascal Bohleber ; Betreuer: Olaf Eisen." Heidelberg : Universitätsbibliothek Heidelberg, 2011. http://d-nb.info/117978278X/34.

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Endres, Sarah L. "Mapping Coastal Great Lakes Wetlands and Adjacent Land Use Through Hybrid Optical-Infrared and Radar Image Classification Techniques: A Remote Sensing and Geographic Information Science Internship with Michigan Technological Research Institute." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1344646318.

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Duygu, Oktem. "Impact Analysis Of European Framework Programmes On Turkish Universities Pilot Study On Information And Communication Technologies, Energy, Food, Agriculture And Fisheries And Biotechnology Themes." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614947/index.pdf.

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The purpose of this study is to determine the scientific and technological, economic, social and organizational impacts of the European Framework Programmes (FPs) on Turkish universities by focusing on the projects in Information and Communication Technologies (ICT), Energy, Food, Agriculture and Fisheries and Biotechnology (KBBE) themes in order to understand, monitor and evaluate outcomes and impacts of FPs as well as to help decision makers and policy makers to develop strategies for maximizing benefits of participation. Data/document review and survey methods were used as evaluation methods. TÜ
BITAK and EC&rsquo
s data and document were reviewed. An online survey was sent to the academicians who have Seventh Framework Projects (FP7) projects in these themes in Turkey. Data that were gathered by survey were analyzed by using Mann-Whitney U Test Method. We concluded that the impacts of these four categories of FP7 projects were high on the universities. Value additions of scientific and technological impacts are relatively high compared to other impacts. Universities whose roles were coordinator or WP leader have higher impacts in all factors. Turkey'
s participation and success in the FP7 are growing thanks to TÜ
BITAK&rsquo
s effort, but further efforts are needed for meeting competitive participation within a defined strategy. Bearing in mind the results of the impact analyses, the study supports Turkey&rsquo
s continuity to forthcoming FPs but there is need for developing national strategies to maximize benefits of participation and to integrate the outcomes with the national innovation strategy.

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Fontaine, Emmanuel. "Masse des cristaux de glace et facteurs de réflectivité radar dans les systèmes de nuages convectifs de moyenne échelle formés dans les Tropiques et la région de la mer Méditerranée." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22527/document.

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Cette thèse s’intéresse à la variabilité de la relation mass-diamètre (m(D)) des hydrométéores en phase glace présents dans les systèmes convectif de moyenne échelle (MCS). Elle s’appuie sur une base de données acquise pour 4 types de MCS différents durant 4 campagnes de mesure aéroportée : (i) MCS de la mousson Africaine (Continent ; MT2010), (ii) MCS de l’océan Indien (MT2011), (iii) MCS de la Méditerranée (côtes ; HyMeX), (iv) MCS de la mousson Nord-Australienne (côtes ; HAIC-HIWC). La relation m(D) est calculée à partir de l’analyse combinée des images des hydrométéores enregistrées par les sondes optiques et les facteurs de réflectivité mesurés à l’aide d’un radar Doppler embarqués sur le même avion de recherche. Il est d’usage que la relation m(D) des hydrométéores soit représentée par une loi puissance (avec un pré-facteur et un exposant), qui doit être contrainte par des informations supplémentaires sur les hydrométéores. Une étude théorique sur les formes des hydrométéores à l’aide de simulations en 3 dimensions dans lesquelles les hydrométéores sont orientés aléatoirement et projeté sur un plan, permet de contraindre l’exposant β de la relation m(D) en fonction de l’exposant σ de la relation surface-diamètre (S(D)). La relation S(D) est aussi représentée par une loi puissance, et elle peut-être calculée pour une population d’images d’hydrométéores enregistrés par les sondes optiques. La variabilité de l’exposant est finalement calculée à partir de la variabilité de l’exposant σ déduis des images des hydrométéores. Ensuite le pré-facteur α est calculé à partir de simulations des facteurs de réflectivité, de sorte que les facteurs de réflectivité simulés soient égaux aux facteurs de réflectivité mesurés par le radar nuage le long de la trajectoire de l’avion dans les MCS. Des profils moyens en fonction de la température sont calculés pour les coefficients de la relation m(D), les distributions en tailles des hydrométéores et les contenus massiques de glace dans les MCS (CWC). Les profils moyens pour les quatre types de MCS sont différents les uns des autres. Pour les quatre types de MCS, il est montré que les variations des coefficients de la relation m(D) sont corrélées avec les variations de la température. Four types de paramétrisations de la relation m(D) sont calculées depuis l’analyses des variations des coefficients de la relation m(D). Le bénéfice apporté par l’utilisation de relation m(D) non constante contrairement à l’utilisation de relation m(D) avec α et β constant, est démontré en étudiant l’impact de toutes les paramétrisations de la relation m(D) sur le calcul des relations Z-CWC et Z-CWC-T
This study focuses on the variability of mass-diameter relationships (m(D)) and shape of ice hydrometeors in Mesoscale Convective Systems (MCS). It bases on data base which were recorded during four airborne measurement campaigns: (i) African monsoon’s MCS (continent; MT2010), (ii) Indian Ocean’s MCS (MT2011), (iii) Mediterranean’s MCS (costs; HyMeX), (iv) North-Australian monsoon’s MCS (costs; HAIC-HIWC). m(D) of ice hydrometeors are derived from a combined analysis of particle images from 2D-array probes and associated reflectivity factors measured with a Doppler cloud radar on the same research aircraft. Usually, m(D) is formulated as a power law (with one pre-factor and one exponent) that need to be constrained from complementary information on hydrometeors. A theoretical study of numerous hydrometeor shapes simulated in 3D and arbitrarily projected on a 2D plan allowed to constrain the exponent β of the m(D) relationship from the exponent σ of the surface-diameter S(D) relationship, which is likewise written as a power law. Since S(D) always can be determined for real data from 2D optical array probes or other particle imagers, the evolution of the m(D) exponent can be calculated. After that, the pre-factor α of m(D) is constrained from theoretical simulations of the radar reflectivity factor matching the measured reflectivity factor along the aircraft trajectory. Mean profiles of m(D) coefficients, particles size distributions and Condensed Water Content (CWC) are calculated in functions of the temperature, and are different for each type of MCS. For the four types of MCS, it is shown that the variability of m(D) coefficients is correlated with the variability of the temperature. Four types of m(D) parametrisations are calculated since the analysis of the variability of the m(D) coefficients. The significant benefit of using variable m(D) relations instead of a single m(D) relationship is demonstrated from the impact of all these m(D) relations on Z-CWC and Z-CWC-T fitted parametrisations

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Athieno, Racheal. "Using co-located radars and instruments to analyse ionespheric events over South Africa." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005279.

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Space weather and its effect on technological systems are important for scientific research. Developing an understanding of the behaviour, sources and effects of ionospheric events form a basis for improving space weather prediction. This thesis attempts to use co-located radars and instruments for the analysis of ionospheric events over South Africa. The HF Doppler radar, ionosonde, Global Positioning System (GPS) and GPS ionospheric scintillation monitor (GISTM) receivers are co-located in Hermanus (34.4°S, 19.2°E), one of the observatories for the space science directorate of the South African National Space Agency (SANSA). Data was obtained from these radars and instruments and analysed for ionospheric events. Only the Hermanus station was selected for this analysis, because it is currently the only South African station that hosts all the mentioned radars and instruments. Ionospheric events identified include wave-like structures, Doppler spread, sudden frequency deviations and ionospheric oscillations associated with geomagnetic pulsations. For the purpose of this work, ionospheric events are defined as any unusual structures observed on the received signal and inferred from observations made by the HF Doppler radar. They were identified by visual inspection of the Doppler shift spectrograms. The magnitude and nature of the events vary, depending on their source and were observed by all, some or one instrument. This study suggests that the inclusion of a wider data coverage and more stations in South Africa merit consideration, especially since plans are underway to host a co-located radar network similar to that in Hermanus at at least three additional observatory sites in South Africa. This study lays a foundation for multi-station co-located radar and instrument observation and analysis of ionospheric events which should enhance the accuracy of space weather and HF communication prediction.

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Eastment, Jonathan David. "Polarimetric doppler radars : an engineering description of S-band polarimetric doppler radars for radiowave propagation research in the tropics." Thesis, University of Bradford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.686256.

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Engfors, Maria. "Kluven solidaritet? : Att formulera feministisk politik inom socialdemokratins ramar." Thesis, Linköping University, Department of Social and Welfare Studies, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10389.

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This thesis focuses on politically active women within The Swedish Social Democratic Women’s Association, also known as S-women. By applying discourse analysis to interviews with active s-women and to meeting conversations between the association’s members, the study approaches ideas of feminism, feminist politics and political commitment. “Solidarity” – the central concept of the labour movement – serves as the point of departure for a feminist discussion about class, gender, ethnicity and age/generation. Political inclusion and exclusion are other keywords when the power relations within feminism in general and this women’s association in particular are examined. The theoretical framework of the thesis covers post-structuralist feminism, intersectionality and discourse psychology.

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Goel, Shlok. "Research, Design, and Implementation of Virtual and Experimental Environment for CAV System Design, Calibration, Validation and Verification." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595368946630713.

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27

Lin, Wei-Chih, and 林韋志. "Research on Group Robot Using Ultrasonic Radar." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5p3agj.

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碩士
健行科技大學
電機工程系碩士班
105
In this paper, we design an Ultrasonic Radar device using three ultrasonic and servo motors, using it as a group of robot behavior monitoring. We use Arduino nano microcontrollers as host and slave for group robots, respectively Using the Ultrasonic Radar we can get the data of each group of robots on the distance and angle, the host at any time to monitor the behavior of the slave action. Finally, the command is sent to the group robot via wireless communication.

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CAI, PU-SHENG, and 蔡樸生. "The research of stability in a radar pedestal." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/21439497221031200017.

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Liao, Chih-Hung, and 廖致弘. "Research on Synthetic Technology of Terrain Radar Image." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/66241752606812442560.

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碩士
元智大學
電機工程學系
99
Synthetic Aperture Radar (SAR) virtual imaging is based on processing and storing the echoed data obtained from a satellite or airborne radar, it does not spotlight a specific target area via beam steering. The form of SAR database is mainly encountered in reconnaissance or surveillance problem. Such a SAR imaging system, which provides a map of a terrain within a fixed strip in the range domain, is also known as strip-map SAR or side-looking SAR. This thesis develops a related research on the interference of virtual images to degrade the capability of SAR detection. We have analyzed the coding format and calculated the backscattering coefficient depending on different terrains characteristic of the SAR image, and then established the terrain mathematical model. Thus we can execute the electronic countermeasure through virtual images .

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YANG, MING-CHIN, and 楊銘欽. "The Research of Radar Multi-Target Adaptive Estimator." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/67912441575169145109.

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碩士
大葉大學
電機工程學系碩士在職專班
94
Radar systems play an important role in both defense industry and civil applications. In order to enhance the performance of the radar tracking system. One adaptive tracking procedure is developed in this thesis. This algorithm will adaptive change the sampling interval based on the target conditions such as the sampling interval will be longer if the targets with maneuvering situation moreover, this algorithm will change the parameters of tracking filter on line to reduce the tracking errors. According to the computer simulation results, the algorithm proposed in this thesis will obtain better tracking performance.

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Liu, Ying-Ming, and 劉英明. "The Research of 3-D Radar Tracking Systems." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/72435133146520594706.

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碩士
大葉大學
電機工程學系碩士在職專班
94
Radar system plays an important role in both defense industry and civil applications. In order to achieve these goals, radar system should have good tracking algorithm, and then, it can obtain high detection probability and reduce the tracking errors. A 3-D tracking model is investigated in this thesis. Such a mathematical model will fit real tracking environment and it will have more accurate tracking results. There is one global tracking procedure developed in this thesis. Moreover, one simulation program using Matlab is designed. According to the simulation results, this tracking algorithm have good performance.

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Chen, Chih-Hao, and 陳志豪. "Research on Star Image Registration for Tracking Radar." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/99959493776360020731.

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碩士
國立臺灣科技大學
電機工程系
90
The adjustment for radar is a necessary job in radar tracking and orientation. This thesis proposes several algorithms for star image recognition. The purpose is to adjust the oriental deviation of the radar caused by mechanical errors. The current method is to calculate the centroid position of a star image. When the lights of the star pass through the cameras or telescopes, due to diffraction effects, luminosity of the center of the star is decreased. If the centroid of the image is calculated directly, the results may be unreliable. The proposed method first is to convert the image into a binary image, and then to use a new thinning algorithm to reduce the image to a few pixels. Finally, a method is used to calculate the centroid of those pixels. Since the obtained location of the star is very noisy, we further propose to use a “circle” regression approach to filter those errors in a sequence of the location trajectory.

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Liang, Shiue-Tzung, and 梁學宗. "A Research on Compression of Radar Target Trajectory." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/20936016415737067202.

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碩士
大葉大學
電信工程學系碩士在職專班
93
In this paper, a parallel method using a Competitive Hopfield Neural Network (CHNN) is proposed for compressing radar track. Based on the CHNN, the compressing radar track is regarded as a minimization of a criterion function which is defined as the arc-to-chord deviation between the curve and the polygon. The CHNN differs from the original Hopfield network in that a competitive winner-take-all mechanism is imposed. The winner-take-all mechanism adeptly precludes the necessity of determining the values for the weighting factors in the energy function in maintaining a feasible result. In order to prove the tracking performance, a computer simulation algorithm is proposed in this paper. Because of its computation capability of this algorithm, the radar measurement related to existed target tracks can be chosen optimally. Computer simulation results indicate that this approach successfully and optimally solves the compressing radar track.

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Lu, Ke-Yu, and 盧科宇. "The Research of Maneuvering Estimation for Radar Tracking Systems." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/37630994504091553109.

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碩士
大葉大學
電機工程學系
95
Maneuvering targets estimation tracking algorithm plays an important role in the research areas of radar systems. When target has maneuvering situation, an adaptive procedure and maneuvering detection algorithm are developed to solve these problems. Simulations results show that this algorithm can greatly improve the tracking accuracy. Such achievement will offer a lot of contributions for the navigation systems.

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HAUWEI-HUANG and 黃皓維. "The Research of Moving Target Indicator for Radar Systems." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/14570385061993975213.

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碩士
大葉大學
電機工程學系碩士在職專班
94
Radar systems play an important role in the applications of both civil and defense systems. Their major tasks are detecting and tracking targets. One moving target indicator is developed in this thesis. The MTI will remove the clutter and detect the moving target effectively. Moreover, the applications of kalman filter and radar tracking system for the moving target tracking. In order to prove this algorithm, a simulation program using Mablab is conducted also.

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侯俊仰. "Research of High Resolution Range-Doppler Radar Imaging Procedure." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/94355317548335942499.

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碩士
國立交通大學
機械工程系所
95
Range-Doppler radar can produce two-dimension imagery of the ground surface versus range and azimuth axis. The quality of ground maps generated by Range-Doppler radar is determined by the size of the resolution cell. A resolution cell is specified by both range and azimuth resolution of the system. Fine range resolution can be accomplished by using pulse compression techniques. The azimuth resolution depends on antenna size and radar wavelength of operation band. In radar range processing, it usually emphasizes the signal to noise ratio to be maximum and utilizes the linear frequency modulation to accomplish the pulse compression. However, it is utilizing the motion of antenna versus the Doppler effect of targets to produce the purpose of linear frequency modulation in azimuth processing. The range and azimuth processing have the same mathematical modal, but have the different physical characteristics and meaning. Basing on the principle of range compression and azimuth compression, the main purpose is to construct a procedure of Strip-map microwave radar by using simulation of point target in this paper.

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37

Yang, Maw-Rong, and 楊茂榮. "The Research of Radar Target Track Smoothing and Compression." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/92915296200082292284.

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博士
大葉大學
電機工程學系
95
Data association algorithm is the most important technique in a multiple-target tracking system. In this dissertation, a method using a Competitive Hopfield Neural Network (CHNN) is proposed for data association. In other hand, based on the CHNN, the radar track smoothing and is also investigated in this dissertation. In this approach, the CHNN differs from the original Hopfield network in that a competitive winner-take-all mechanism is imposed. In order to have completely tracking process, the maneuvering procedure is also applied. In order to analyze the performance of this system, a computer simulation algorithm is conducted and the simulation results indicate that this approach successfully obtains the better radar track.

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Yu, Chun-Chin, and 余俊慶. "The Research of Radar Adaptive Sampling Rate for Tracking Systems." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/84184208394517373800.

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碩士
大葉大學
電機工程研究所
89
In order to solve target-maneuvering problems, an improved tracking algorithm has been developed in this thesis. In tracking system, if the sampling rate of system is too fast then the operation quantity of system will be bigger. However, if the sampling rate of system is too slow then the tracking error will be bigger. So we want to create a tracking algorithm to reduce the operation quantity of system while keep a low tracking errors. The major frame of this thesis contains an Adaptive Sampling Rate Tracking Algorithm, adaptive extended Kalman filter and to utilize a data association technique denoted 1-step conditional maximum likelihood. Via this approach, target-maneuvering productive great errors can be decreased and the tracking system will obtain better performance. Moreover, in order to verify the approach of this thesis is really improved. We detail to analyze and to compare with three types of simulations of tracking algorithm and to hypothesis many different target track situations. We convince that the proposed approach will enhance the radar tracking performance and obtain better tracking results.

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39

LIU, WAN-CHUN, and 劉婉君. "The Research of Radar Tracking System Using Multiple Model Algorithm." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56343258954511653329.

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博士
大葉大學
電機工程學系
98
The multiple-target tracking algorithm plays an important role in a radar system. The key techniques for improving the tracking accuracy include data association and maneuvering estimation algorithm. In this dissertation, a data association denoted one-step conditional maximum likelihood algorithm is proposed to improve the tracking capability. Moreover, an improve algorithm denoted the adaptive multiple model estimator is developed in this dissertation. When target maneuvering movement is occurred, maneuver detection and acceleration estimation algorithms are applied to modify the parameters of the tracking filter. In this algorithm, a bank of Kalman filters is applied to improve the tracking accuracy of radar surveillance. Based on computer simulations, we can convince this approach will obtain the better tracking results.

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40

陳政斌. "The research of radar tracking systems by using multiple observations." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/94139163320671084363.

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碩士
大葉大學
電機工程學系碩士班
92
In the multi-target tracking systems, there are many disturbances from the outside environments to influence the estimated correctness. Moreover, when radar systems detect a large area and only use single sensor, it needs longer sampling interval to execute the tracking process and it may lost some data. Therefore, it is important to design a new structure of the radar systems to enhance the system performance. In this thesis, a mutiple sensor fusion algorithm is proposed to improve the tracking capability. This improved filter constructs of the Kalman filter and the adaptive procedure, and integrates some related techniques included one-step conditional maximum likelihood, recursive computation method, and multi-observation. By this way, we can diminish the errors resulted from producing maneuvering targets, then, the systems will get the better tracking results. Keywords: Radar systems, multiple sensor fusion algorithm, multi-observation.

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Chen, Szu-Tsung, and 陳賜宗. "The Research of A Smoothing Estimator for Radar Target Tracking." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/69633787235686741520.

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碩士
大葉大學
電機工程學系碩士在職專班
94
Radar target tracking system plays very important role in defense systems.It needs to recognize the targets of enemy and to track such targets accurately.In order to raise the tracking accuracy,recomputing the data of history and smoothing the trajectory are necessary.It will offer the tracking system more capability to enhance its performance. However,it may need a lot of memory to handle this task.In this thesis,one new method based on neurad network computation algrithm is imvestigated. It will reduce the necessary memory and still can keep almost completed trajectory.This method will enhance the power of radar tracking systems

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42

Hall, Christopher James. "Radar/Gdf6a function during zebrafish (Danio rerio)embryogenesis." 2002. http://hdl.handle.net/2292/3101.

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In the early vertebrate embryo, the vascular system is one of the first organ systems to form. Recently it has become evident that the development of mature, functional vessels requires not only signals derived from the endothelium itself, but a set of additional molecules that are not necessarily endothelium-specific. In zebrafish and Xenopus embryos two such tissues that are believed to secrete modulators of blood vessel assembly are the hypochord and primitive gut endoderm (PGE). These tissues intimately border the major axial vasculature. Radar/Growth/differentiation factor 6a (Gdf6a) represents a signalling molecule belonging to the GDF5, 6, 7 subgroup of the transforming growth factor-beta (TGF-β) superfamily. In the zebrafish, transcripts for radar are located in the hypochord, PGE and ventral tail mesenchyme (VTM), all tissues that border the developing axial blood vessels. This prompted an investigation into a potential role for this signalling bone morphogenetic protein (BMP) during the specification and assembly of the closely related vascular and haematopoietic systems in the zebrafish. Transient forced expression experiments confirmed an early ventralising activity for the Radar signal that resulted in the expansion of the haematopoietic/vascular compartment, known as the intermediate cell mass (ICM). However, a loss-of-function zebrafish model generated using morpholino technology demonstrated a critical requirement for this BMP signal in establishing the integrity of the axial blood vessels. Furthermore, this requirement was independent of the initial establishment of vascular patterning. Zebrafish embryos depleted of the Radar signal initiate a normal primitive circulation. However, soon after this commencement of normal flow, blood cells were observed to extravasate from the axial vasculature. Microangiography confirmed this leakage phenotype. Such an angiogenic/maturation role for Radar during vascular development was supported by a transgenic zebrafish line carrying an inducible copy of the radar gene. Homozygous transgenic embryos established a typical early circulation that became progressively restricted until no blood travelled throughout the entire embryonic tissue. In summary, the work presented in this thesis strongly suggests that Radar is involved in a signalling pathway required for establishing the integrity of the axial vessels during zebrafish development.

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Shao, Szu-Kai, and 邵思凱. "Research and Analysis for 24-GHz FMCW Short-Range-Radar System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/28308709504200760412.

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碩士
國立中興大學
電機工程學系所
105
In this thesis, utilizing the frequency modulation continuous wave(FMCW) radar to achieve short-range measurement application and the radar transceiver module''s specifications for system design considerations is proposed. This thesis is divided into three parts to be discussed separately. The first part describes the basic concepts of FMCW, including analysis of brief system, static and dynamic analysis of range applications, and analysis of extreme cases. The second part introduce the system behavior simulation of FMCW radar system, which operates in the frequency range of 24GHz to 24.25GHz. The content includes system simulation and system-level behavior simulation. The last part is to verify practicality of the radar transceiver module to understand the frequency of electromagnetic waves on different material objects. We give the accuracy of the measurement system and the measurement results compared with simulation results.

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44

Hong, Zhi-Hong, and 洪志弘. "The Research of Radar Multiple Target Maneuvering Estimate and Adaptive Systems." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/55229448693212968550.

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碩士
大葉大學
電機工程研究所
88
ABSTRACT An improved algorithm for tracking multiple maneuve- ring targets using a new approach has been developed in this thesis. This algorithm is implemented with an adaptive filter consisting of a data association technique denoted 1-step conditional maximun likelihood together with a bank of Kalman filters as an adaptive maneuvering compensator. Via this approach, both data association and target maneuv- ering problems can be solved simultaneously. Moreover , in order to verify such a tracking system is really improved. Detailed simulations of the multi-target tracking using several tracking algorithms for many situations are developed. Computer simulation results indicate that this approach successfully tracks multiple targets and have better performance also.

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45

Hu, Kuo-Chang, and 胡國昌. "The Research of Applying Optimal Estimation Theory to Radar Tracking Systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/61152010023904323305.

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博士
大葉大學
電機工程學系
98
ABSTRACT In a radar system, the tracking accuracy plays very important role even in a complicated environment. The key techniques for improving the tracking accuracy include data association and maneuvering estimation algorithm. When target maneuvering movement is occurred, the measurement error will increase. Therefore, it is important to design a new structure for the radar systems to enhance the system performance. In order to exact tracking targets, maneuver detection and acceleration estimation algorithm are applied to modify the parameters of the tracking filter. The adaptive multiple model estimators that the dissertation presented can solve the target maneuver problem. Moreover, the data association technique is not only applied to associate measurement with the predict target but also reduced the tracking error. In this dissertation, a competitive Hopfield neural network (CHNN) algorithm is proposed to improve the tracking capability. With the developed algorithm, the optimal estimation theorem is applied to improve the tracking accuracy and reliability of radar surveillance. By this way, we can diminish the errors resulted from producing maneuvering targets, then, the systems will get the better tracking results.

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Lee, Yu-Lin, and 李育霖. "The Research of the LTE Technology Applies to the Radar Data Transmission." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/20269347654420577812.

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碩士
華梵大學
資訊管理學系碩士班
102
Republic of China in 102 the national defense report revelation, the national troops are the national security and the people's blessing guard, also is the democratic constitutionalism protector, strengthens throughout “survives the development for Republic of China to fight, fights the faith for the Taiwan Peng golden horse common people safety blessing”, understands clearly “the national troops is profoundly the national troops, the communist army is a communist army, this proper limit, extremely clear, does not have the fuzzy space.” And adopts the suitable achievement, guarantees the national security. Chinese Communist Party's overall national strength large growth, the Chinese Communist Party until now not yet announced especially the giving up military force violates Taiwan, in the coast still deployed more than 1000 missiles, our country must face up to the Chinese Communist Party to me the threat. Present paper main entire LTE, WiMAX and the Radar related literature material, after collects entire according to discusses utilizes the LTE execution Radar data transmission the feasibility, after the expert interview and with the army senior specialists deliberated completes the decision tree questionnaire manufacture and the data compilation, completes questionnaire filling in by the correlation correspondence and the radar gear attendant and the senior communications-electronics staff officer personnel, after chooses the effective questionnaire to gain the rule by the decision tree calculating method classification technology, the time provides the air force following to apply using the LTE technology of reference in the radar data material transmission.

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Huang, Sheng-Qiang, and 黃聖強. "The Research of Applying Neural Network to Combine Radar Tracking and Image Processing." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/83608108858130312909.

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碩士
國立彰化師範大學
電機工程學系
98
In a radar tracking system, the multiple-target tracking (MTT) is an indispensable crucial technique. Whether the tracking system is able to correctly estimate the true target trajectory which involves two key problems that the data association technique and maneuvering detection. In this thesis, proposed applying special operation structure of competitive neural network to develop a computing processing for data association technique, to complement the radar tracking system. This thesis also applies image processing techniques to consider the type and shape of targets, which will increase the detection probability of targets and reduce the estimation error. After pre-processing for image, extraction the features of targets and then use similarity measurement functions for image features recognition. Finally, we can obtain the targets’ image quantity information by Structural Similarity (SSIM), to combine with CHNN data association technique and adaptive processing. This approach can track the target more accurately. The simulation results indicated that the proposed approach can reduce the tracking error and solve the data association problems under complex conditions.

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48

(Harris), Pao-Hua Chou, and 周寶華. "The Research of Applying a Dynamic Adaptive Estimator for Radar Target Tracking Systems." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/83056213298626108474.

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博士
大葉大學
電機工程學系
95
ABSTRACT In view of the lack of dynamicity in a traditional fixed sensor system, an algorithm for tracking multiple maneuvering targets in a dynamic sensor system is proposed in this dissertation. The algorithm combines coordinate conversion logics and a multiple sensor data fusion for it to work in the dynamic sensor system. With the developed algorithm, the sensors can be installed in fixed or moving systems, which will improve the tracking accuracy and reliability of radar surveillance. Moreover, in order to overcome the problems inherent in a complex situation caused by tracking multiple maneuvering targets and to relieve the load of data association, a computation logic, including gating 1-step conditional maximum likelihood and a variable structure model as an adaptive maneuvering compensator, are applied to simultaneously solve both problems of data association and target maneuvering. In order to improve the system performance, another algorithm denoted Competitive Hopfield Neural Network (CHNN) is applied to our tracking system. In order to verify this approach, simulations of multi-target tracking problems are conducted. Computer simulation results indicate that this approach successfully tracks multiple targets in a dynamic sensor system and has good performance. Keywords: dynamic sensor system, multiple sensor data fusion, gating, 1-step conditional maximum likelihood, Competitive Hopfield Neural Network, adaptive maneuvering compensator.

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49

Peng, Teng-Chong, and 彭騰衝. "The Research on the Application of Ground-Penetrating Radar in Underground LNAPL Contamination." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/jj8457.

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Abstract:

碩士
國立臺北科技大學
土木與防災研究所
95
The common underground organic solution pollutions are mostly the results of Light Non-Aqueous Phase Liquid (LNAPL), whose nature allows the dispersion with surface runoff and groundwater. Therefore, such pollutions are seldom detected until it is too late. However, the traditional destructive surveying techniques are unable to provide an accurate detection of the extent of LNAPL. Thus, several non-destructive surveying methods are extensively studied and applied, while one of them is the ground-penetrating radar (GPR). GPR explores the anomalies and formation in the underground geology by taking the advantage of the capabilities of penetration and reflection in different materials to electromagnetic waves. In this study, a pollution site at Shui-Shan, Chiayi County is introduced for the analysis. By studying historic geologic information and geographic conditions, the GPR profiles are plotted for measurement. The measurement using GPR is conducted by consulting the characteristics of pollution and electricity. The results are compared with those from resistivity surveys to verify the feasibility of using GPR for underground pollution survey. The accuracy of GPR survey is verified by comparing groundwater table monitoring results and bore logs after the extent of pollution is plotted. Finally, the program Matlab is used for preliminary image processing, and the levels of pollution are classified with applicable software in order to minimize human identification and intervention in GPR results. The result of study shows that GPR does display the capability to detect the existence and extent of LNAPL, and the results are relatively accurate. In addition, the preliminary combination of image processing gives an encouraging result. It is proven that the combination of GPR and image processing does demonstrate a promising future.

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50

Hsu, Shao-En, and 徐紹恩. "The Research on Spatiotemporal Sequence Change of Radar Echo based on Deep Learning." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5396033%22.&searchmode=basic.

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Abstract:

碩士
國立中興大學
資訊管理學系所
107
The weather forecasting has been a very difficult problem for a long time. Special geographical location and serious terrain make Taiwan more difficult to forecast the weather. This study makes use of the large-scale observation of precipitation information and temporal immediacy of radar echo, and precipitation nowcasting for Taiwan area. This study regard radar echo as spatiotemporal sequence data, and verify the spatiotemporal relationship based on deep learning method. Experiments show the movement change of the radar echo can be captured, by amplifying radar echo input scale. And lengthened the input time series, which can reflect the successive changes of the radar echo intensity. The radar echo characteristics, that obtained from the previous experiments are used as the basis for the establishment of the radar echo prediction model. And establish the prediction model that can forecast one hour later for Taiwan area, through model hyperparameter optimized. Then, the radar echo prediction model error analysis shows that the error occurs mostly at the time when the radar echo is generated, decay and the strong and weak state alternate. In addition, the model prediction analysis under different terrains shows the plain terrain has less influence on radar echo changes, so that the model is easier to grasp and the forecast level is higher than other terrains. However, the altitude and forecast level have a positive relationship exclude the plain terrain, and the forecast level will be affected by thermal properties difference between the land and sea. Finally, the prediction model established in this study are superior to the Persistence model in various terrains, indicating that the model has forecasting ability. In the future work, we will try to extend the forecasting time from one hour to three hours, and explore the feasibility of establishing prediction model for the Taiwan area by using transfer learning.

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Dissertations / Theses on the topic 'Radar – Research'

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