Дисертації з теми "Sensing-based control"
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Saeidpourazar, Reza. "Microcantilever-based force sensing, control and imaging." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1247509027/.
Повний текст джерелаAllwine, Daniel Alan. "Personal computer based data acquisition, sensing and control." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1174932273.
Повний текст джерелаCraver, Matthew David. "Mobile Robot Homing Control Based on Odor Sensing." Thesis, North Carolina State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3690207.
Повний текст джерелаStieber, Michael E. "Aspects of vision-based sensing and control for space robots." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/NQ36796.pdf.
Повний текст джерелаAalderink, Bernard Johan. "Sensing, monitoring and control for laser based welding of aluminium sheets." Enschede : University of Twente [Host], 2007. http://doc.utwente.nl/58019.
Повний текст джерелаZhang, Zhongkai. "Vision-based calibration, position control and force sensing for soft robots." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I001/document.
Повний текст джерелаThe modeling of soft robots which have, theoretically, infinite degrees of freedom, are extremely difficult especially when the robots have complex configurations. This difficulty of modeling leads to new challenges for the calibration and the control design of the robots, but also new opportunities with possible new force sensing strategies. This dissertation aims to provide new and general solutions using modeling and vision. The thesis at first presents a discrete-time kinematic model for soft robots based on the real-time Finite Element (FE) method. Then, a vision-based simultaneous calibration of sensor-robot system and actuators is investigated. Two closed-loop position controllers are designed. Besides, to deal with the problem of image feature loss, a switched control strategy is proposed by combining both the open-loop controller and the closed-loop controller. Using soft robot itself as a force sensor is available due to the deformable feature of soft structures. Two methods (marker-based and marker-free) of external force sensing for soft robots are proposed based on the fusion of vision-based measurements and FE model. Using both methods, not only the intensities but also the locations of the external forces can be estimated.As a specific application, a cable-driven continuum catheter robot through contacts is modeled based on FE method. Then, the robot is controlled by a decoupled control strategy which allows to control insertion and bending independently. Both the control inputs and the contact forces along the entire catheter can be computed by solving a quadratic programming (QP) problem with a linear complementarity constraint (QPCC)
Kirkpatrick, Daniel Eugene. "Design of a Hardware Platform for GPS-Based Orientation Sensing." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2197.
Повний текст джерелаSchgallis, Richard J. "Phase diversity wavefront sensing for control of space based adaptive optics systems." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FSchgallis.pdf.
Повний текст джерелаThesis Advisor(s): Agrawal, Brij ; Larazza, Andres. "December 2007." Description based on title screen as viewed on January 18, 2008. Includes bibliographical references (p. 53-54). Also available in print.
Wang, Jun. "Switching-Cycle Control and Sensing Techniques for High-Density SiC-Based Modular Converters." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83518.
Повний текст джерелаPh. D.
Xiong, Rentian. "In situ sensing for chemical vapor deposition based on state estimation theory." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22711.
Повний текст джерелаCommittee Chair: Gallivan, Martha; Committee Member: Ferguson, Ian; Committee Member: Henderson, Cliff; Committee Member: Hess, Dennis; Committee Member: Lee, Jay.
Lu, Wei-Bin. "GFP-based sensing and state estimation in transgenic plant cell culture /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060120.
Повний текст джерелаDi, Long. "Cognitive Formation Flight in Multi-Unmanned Aerial Vehicle-Based Personal Remote Sensing Systems." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/985.
Повний текст джерелаChong, Ian Ian. "Vibration control and genetic algorithm based design optimization on self-sensing active constrained layer damped rotating plates." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493698.
Повний текст джерелаTeoh, Pek Loo. "A study of single laser interferometry-based sensing and measuring technique in robot manipulator control and guidance. Volume 1." Monash University, Dept. of Mechanical Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9565.
Повний текст джерелаLöchner, Anne Christina [Verfasser], and Victor [Akademischer Betreuer] Sourjik. "Quorum sensing- and contact-dependent inhibition-based population control in synthetic microbial communities / Anne Christina Löchner ; Betreuer: Victor Sourjik." Marburg : Philipps-Universität Marburg, 2021. http://d-nb.info/1228535647/34.
Повний текст джерелаSchmedtmann, Jonas. "Automatizing photo interpretation of satellite imagery in the context of the Common Agriculture Policy subsidy control." Master's thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/8294.
Повний текст джерелаComputer Assisted Photo-Interpretation (CAPI) uses remotely sensed imagery to control farmers’ subsidy applications in the context of the EU’s Common Agriculture Policy. A simple and reproducible method to automatize CAPI in an operational context with the overreaching goal to reduce control costs and completion time was developed in this study. Validated control data provided by the Portuguese Control and Paying Agency for Agriculture (IFAP) and a multispectral atmospherically corrected Landsat ETM+ time series were used to calibrate and test the method. Taking advantage of the nature of subsidy declarations, object-based land cover classification for the 12 most controlled classes was carried out in the region of Ribatejo. The main feature of the presented method is that it allows choosing a confidence level on the automatic classification of farmers’ parcels. While higher confidence levels reduce the risk of misclassifications, lower levels increase the number of automatic control decisions. A confidence level of 80% is a good compromise. This confidence level leads to over 55% of automatically taken control decisions with an overall accuracy of 84%. Furthermore, over 85% of all parcels classified as maize, rice, wheat or vineyard can be controlled by the method with the optimal confidence level.
Long, Fei. "Three-Dimensional Motion Control and Dynamic Force Sensing of a Magnetically Propelled Micro Particle Using a Hexapole Magnetic Actuator." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452093964.
Повний текст джерелаÖberg, Månsson Ingrid. "Electroanalytical devices with fluidic control using textile materials and methods." Licentiate thesis, KTH, Fiberteknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279327.
Повний текст джерелаDenna avhandling, skriven av Ingrid Öberg Månsson vid Kungliga Tekniska Högskolan och titulerad ”Elektroanalytiska sensorer med vätskekontroll integrerad genom användande av textila material och metoder”, presenterar experimentella studier inom utvecklingen av textilbaserade elektroniska komponenter och biosensorer. Detta är av intresse på grund av den ökade efterfrågan på integrerade smarta produkter som till exempel bärbara sensorer för hälsoövervakning eller för att samla upp och konvertera energi till elektricitet. För att möjliggöra denna typ av produkter föds nya interdisciplinära fält där traditionell textilteknologi och elektronik möts. Textilbaserade enheter har väckt stort intresse under de senaste åren på grund av den naturliga förmågan att integrera funktion i till exempel kläder eller förband genom textila tillverkningsprocesser som väveri, stickning eller sömnad. Många modifikationer hos garner som krävs för att möjliggöra sådana tillämpningar är dock inte tillgängliga i större skala. Därför har det huvudsakliga syftet med denna studie varit att undersöka hur man kan uppnå den prestanda som krävs för att tillverka elektroniska textila komponenter, antingen genom att belägga garner med elektroniskt ledande material eller genom att använda kommersiellt tillgängliga ledande garner som sedan modifieras kemiskt för att skapa sensorer. Utöver detta har vätsketransport inom textila material studerats för att kunna styra och kontrollera kontaktytan mellan elektrolyt och elektroder i elektrokemiska enheter så som sensorer och transistorer. Garner med speciella tvärsnitt, som traditionellt använts i sportkläder för att transportera svett bort från kroppen och underlätta avdunstning, har använts för att transportera elektrolytvätska till elektroder av garn. Den definierade kontaktytan där det vätsketransporterade garnet korsar elektrodgarnet har visats öka stabiliteten av mätningen och reproducerbarheten mellan mätenheter. Resultaten som presenteras i de två artiklar som denna avhandling bygger på samt i avhandlingen själv visar på lovande potential för användandet av textila material för att integrera elektronisk och elektrokemisk funktionalitet i våra vardagsliv. Detta har uppnåtts genom att använda grundläggande textila material och tillverkningsprocesser för att tillverka komplexa enheter för olika tillämpningsområden så som sensorer för diagnostik samt elektroniska komponenter.
QC 2020-08-21
Wijesoma, Wijerupage Sardha. "Robot control using joint and end-effector sensing." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279587.
Повний текст джерелаWest, Jerry. "Orthoplanar Spring Based Compliant Force/Torque Sensor for Robot Force Control." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6637.
Повний текст джерелаTokarz, Ryan E. "Spatial-temporal Distribution of Mosquito Larval Hot Spots in Papoli, Uganda: A Community-Based Approach to Mosquito Control." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7448.
Повний текст джерелаBattiston, Enrico. "Développement d’un outil innovant pour optimiser l'activité biologique des substances actives afin de contrôler des maladies fongiques chez Vitis vinifera L. Unmanned A erial Vehicle (UAV) - based remote sensing to monitor grapevine leaf stripe disease within a vineyard aff ected by esca complex Grapevine trunk diseases: a review of fifteen years of trials for their control with chemicals and biocontrol agents." Thesis, Reims, 2018. http://www.theses.fr/2018REIMS046.
Повний текст джерелаThe research investigates the application of biomimetic calcium phosphate as innovative delivery system for grapevine (Vitis vinifera L.) protection purposes. This smart material was successfully studied in the biomedical field, from the functionalization of biomimetic calcium phosphate with anti-cancer molecules for localized releases, to the development of an innovative toothpaste for oral hygiene. Preliminary assays to implement the control of the grapevine fungal diseases, have revealed promising results. In this framework, the biomimetic inorganic hydroxyapatite was investigated as potential delivery system of bioactive substances allowed in organic agriculture for plant protection.Through a multidisciplinary approach, the study was aimed to evaluate the efficiency of hydroxyapatite in enhancing the biological activity of copper(II) compounds, on the control of relevant common diseases, like downy mildew, and complex fungal diseases, such as the grapevine trunk diseases. This aim is related to further ambitious goals: the significant reduction of the fungicides amounts applied in plant protection and the optimization of the distribution and persistence of the bioactive substances in the plant tissues, including the vascular ones, where harmful pathogens can develop. Overall, the experimental activities allowed: (i) to understand the interaction between delivery system, functional substance and grapevine tissues; (ii) to demonstrate the mechanism on which the higher efficacy of the functional substance is based; (iii) to collect new information on the mechanisms involved in the symptoms expression by studying the plant defense reactions induced by the treatments
Peng, Jun-Hao, and 彭君豪. "Implementation of IoT-Based Home Environment Sensing and Control System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/15240380438987670969.
Повний текст джерела明新科技大學
電機工程系碩士班
103
IoT (Internet of Things) is booming in recent years. Its concept based on the way of thing to thing is connected to a network through message passing, reading and processing. There’re smart family, logistics transportation and medical system, etc. in daily life, and more huge IoT business opportunities will be derived and broken through in the future. This study aimed at home environment sensing and home appliance monitoring, and considered the operation of WSN (Wireless Sensor Network)installation. Arduino used in node as arithmetic unit in coordination with XBee(802.15.4/ZigBee) module to transfer data, DHT11 temperature/humidity sensors and TGS-2602 gas sensors used to apply multiple nodes as SPIN routing protocol, transferring node data to server-end and mobile phone, sending controlling order to the server, and then sending controlling order to home appliance node for the control of home appliance through XBee connected to the server. Additionally, the effect of automatic controlled-environment can be also processed through automatic control module in the server according to environmental conditions.
Cheng, Chiao-Chih, and 鄭喬植. "Based on brainwave sensing multi-control system of home appliances." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/gs976y.
Повний текст джерела樹德科技大學
電腦與通訊系碩士班
106
Aging of population is the trend in the 21st century. Even though we live in an ever-changing technology country, the lowest birth rates still cause the problem of aging society with fewer children. Government must to face the aging problem in the future. At this time some elders move with difficult need to rely on these tools to improve their quality of life and control home appliances through sensing technology. Technology has also rapidly advanced in the 21st century. By using brainwave sensing technology, users can start and control electrical home appliances through the "think" way only. Because the technology does not need to talk, it can improve people who is physical disabilities greatly benefit the quality of life who is the physical abilities and the aging population in particular and the life of an aging society has also been assisted.
Esterhuyse, Henno. "Non-invasive electromyography-based sensing for proportional prosthesis control / Henno Esterhuyse." Thesis, 2012. http://hdl.handle.net/10394/11072.
Повний текст джерелаThesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2012
汪奎仲. "Human Gesture Based Physical Agent Motion Control Using Body Sensing Technology." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/28669069442916020720.
Повний текст джерела逢甲大學
資訊工程學系
102
We proposes a motion-sensing technology based physical agent control interface. Through a Kinect skeleton tracking function used for recording users’ body motion data, users can easily translate human body motions into the commands/programs for triggering the corresponding robot motions. Such that an Application Programming Interface (API) for robot control/manipulation is therefore built. Such an API is helpful to programmers who involve robots’ motions in their programs in eliminating the burdens of low level and trivial coding of robot mechanical controls. Additionally, for the users who will write codes for performing continuous robot motions, this paper also proposes a graphic authoring tool for editing robot motion. Moreover, by combining the built-in speech recognition function of Kinect, programmers may easily design the desired robot motion.
"A PVDF-based sensing system for automated micro-manipulation." 2002. http://library.cuhk.edu.hk/record=b5891131.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2002.
Includes bibliographical references (leaves 110-114).
Abstracts in English and Chinese.
摘要 --- p.i
ABSTRACT --- p.ii
ACKNOWLEDGMENTS --- p.iii
TABLE OF CONTENTS --- p.iv
LIST OF FIGURES --- p.vi
Chapter 1. --- Introduction --- p.1
Chapter 1.1 --- Background and Motivation --- p.1
Chapter 1.2 --- Objective of the project --- p.4
Chapter 1.3 --- Organization of the thesis --- p.5
Chapter 2. --- Literature Review --- p.7
Chapter 2.1 --- Control on Micro-Manipulation --- p.7
Chapter 2.1.1 --- Visual Feedback Control --- p.8
Chapter 2.1.2 --- Sensor-Based Feedback Control --- p.9
Chapter 2.1.3 --- Bilateral Control --- p.9
Chapter 2.2 --- Force Sensing System on Micro-Manipulation --- p.10
Chapter 2.3 --- PVDF Sensor --- p.11
Chapter 2.4 --- Summary of the Literature Review --- p.12
Chapter 3. --- Micro-Manipulation --- p.14
Chapter 3.1 --- Introduction of Micro-Manipulation --- p.14
Chapter 3.2 --- Probe Station --- p.14
Chapter 3.2.1 --- Micromanipulators --- p.15
Chapter 3.2.2 --- Microscopes --- p.15
Chapter 4. --- Piezoelectric Polyvinylidence Fluoride (PVDF) Sensor --- p.16
Chapter 4.1 --- Charteristic of PVDF Sensor --- p.16
Chapter 4.1.1 --- Piezoelectric Properties --- p.16
Chapter 4.1.2 --- Dimensions of the PVDF Sensor --- p.18
Chapter 4.2 --- Comparison of Piezoelectric Materials --- p.19
Chapter 5. --- Theoretical Analysis of PVDF Sensor --- p.21
Chapter 5.1 --- Sensitivity of PVDF Sensor --- p.21
Chapter 5.2 --- Relationship between the Deflection and the Force of the PVDF --- p.22
Chapter 5.3 --- Calculation of the Spring Constant K of the PVDF --- p.23
Chapter 5.4 --- Simulation on the output from the PVDF Sensor --- p.23
Chapter 6. --- Experimental Analysis of PVDF Sensor --- p.26
Chapter 6.1 --- Force-Deflection Diagram --- p.26
Chapter 6.2 --- Frequency Response of the PVDF Sensor --- p.27
Chapter 7. --- 1-D PVDF-Based Sensing System --- p.30
Chapter 7.1 --- Original Design of the Sensing System --- p.30
Chapter 7.1.1 --- Plastic pipe and adapter --- p.31
Chapter 7.1.2 --- PVDF Sensor --- p.32
Chapter 7.1.3 --- Probe-tip holder --- p.32
Chapter 7.2 --- Current Design of the Sensing System --- p.32
Chapter 7.3 --- Analysis of the Sensing System --- p.34
Chapter 7.3.1 --- Frequency Response of the Sensing System --- p.34
Chapter 7.3.2 --- Sensitivity of the Sensing System --- p.41
Chapter 8. --- Experiments on 1-D PVDF Sensing System --- p.49
Chapter 8.1 --- Experimental Setup of the 1-D Sensing System --- p.49
Chapter 8.1.1 --- Programmable Micromanipulator --- p.50
Chapter 8.1.2 --- Charge Amplifier --- p.51
Chapter 8.2 --- Calibration of the 1-D Sensing System --- p.53
Chapter 8.2.1 --- Noise Signal from the system --- p.53
Chapter 8.2.2 --- Signal from vibration --- p.55
Chapter 8.3 --- Experimental Results on touching a substrate --- p.60
Chapter 8.3.1 --- Description --- p.60
Chapter 8.3.2 --- Results from touching a substrate --- p.62
Chapter 8.3.3 --- Analysis of the deflection after touched a substrate --- p.67
Chapter 8.4 --- Experimental Results on touching a micro mirror --- p.68
Chapter 8.4.1 --- Description --- p.68
Chapter 8.4.2 --- Results --- p.70
Chapter 8.5 --- Experimental Results on lifting a mass platform --- p.74
Chapter 8.5.1 --- Description --- p.74
Chapter 8.5.2 --- Results --- p.76
Chapter 9. --- Modification of 1-D Sensing System --- p.79
Chapter 9.1 --- Design of the system --- p.79
Chapter 9.2 --- Experimental Setup of the system --- p.80
Chapter 9.3 --- Experimental Results on lifting a mass platform --- p.81
Chapter 10. --- 2-D PVDF-Based Sensing System --- p.90
Chapter 10.1 --- Design of the Sensing System --- p.90
Chapter 10.2 --- Experimental Setup --- p.91
Chapter 10.3 --- Calibration of the 2-D Sensing System --- p.92
Chapter 10.3.1 --- Noise Signal from the system --- p.92
Chapter 10.4 --- Experiments Results on touching a substrate --- p.94
Chapter 11. --- Experimental Analysis --- p.97
Chapter 11.1 --- Data Acquisition --- p.97
Chapter 11.2 --- Spectrum Analysis of the Experimental Data --- p.101
Chapter 12. --- Conclusion --- p.103
Chapter 13. --- Future Work --- p.105
Chapter 13.1 --- Control of the Sensing System --- p.105
Chapter 13.2 --- Tele-operation System on force feedback sensing system --- p.107
Chapter A. --- Appendix --- p.109
Chapter A. 1 --- Procedures in using probe station --- p.109
Bibliography --- p.110
CHIA, NAI-CHIEH, and 賈乃杰. "Human Gesture Based Multiple Physical Agent Motion Control Using Body Sensing Technology." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7649b5.
Повний текст джерела逢甲大學
資訊電機工程碩士在職學位學程
107
This paper proposes a system that simplifies the authoring of robot movements for users, capturing the user's gestures and movements in a somatosensory manner. And then the system converts them into robot movement commands using vectors and kinematics, and enhances the capturing of multiple human body movements through multiple Kinect devices. Identifying and capturing gestures and processes, and adding some of multi-agent interaction parameters, such as time space, to allow multiple users to use the body as a controller to control the actions of multiple agents simultaneously. Finally, by enhancing RDSL into Multi-Robot-control Domain Specific Language (MRDSL), the action authoring mechanism can be used in other robot application systems as a complete robot development environment.
Sease, Bradley. "Vision-Based Sensing and Optimal Control for Low-Cost and Small Satellite Platforms." Master's thesis, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6175.
Повний текст джерелаM.S.A.E.
Masters
Mechanical and Aerospace Engineering
Engineering and Computer Science
Aerospace Engineering; Space System Design and Engineering Track
Keller, Eric. "Real-time sensing of fatigue crack damage for information-based decision and control." 2001. http://etda.libraries.psu.edu/theses/available/etd-0404101-102735/.
Повний текст джерелаSun, Yeh-Liang, and 孫也喨. "Adaptive Power Control Mechanisms based on Auxiliary Channels in Carrier-sensing Wireless Environments." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3n8vu2.
Повний текст джерелаHuang, Yu-Chao, and 黃昱超. "Building a Web Based Sensing and Control System with Arduino MCUs and Linux Server." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/30490125344964960167.
Повний текст джерела朝陽科技大學
資訊工程系
103
A web management sensing and control system built on Arduino MCUs and Linux server was successfully developed. The server monitors all peripheral devices through RS-485 interface which was based on Modbus protocol. The terminal devices used in this study were Arduino module, series-to-parallel module, temperature and humidity sensing module, air pressure sensing module, RFID reader, voice module and industrial standard PID controller. High security Linux system with web and database server was used in this study. The server collects and analyzes all data from peripheral devices and provides a well-use interface.
Giebeler, Christopher. "Implementation and evaluation of an amplitude-based self-sensing torque control for induction machines." 2002. http://catalog.hathitrust.org/api/volumes/oclc/50250003.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 225-231).
Chen, Zheng-Long, and 陳政隆. "Unmanned Vehicles Remote-Control Based on Android Mobile Device for Video Surveillance and Environment Sensing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2racy9.
Повний текст джерела國立彰化師範大學
電機工程學系
105
In this thesis, the unmanned vehicle is controlled by using the Android mobile device. It combines the functions of video surveillance and environment sensing. This study uses the LinkIt Smart 7688 Duo development board as the unmanned vehicle control core, and uses App Inventor 2 to design an Android system App. The smart phones and tablet computer are used as a remote vehicle controller to replace the traditional joystick. The system of this study has the advantages of convenience, low cost and multi-function. In wireless communication, control signals and data transmission using Bluetooth technology, video streaming using Wi-Fi technology. In vehicle remote control, in addition to including the basic touch mode, but also to achieve voice mode and acceleration sensing mode. In video surveillance, via a web browser and App the real-time images can be observed. In environmental sensing, this study detects carbon monoxide as an example, and when the concentration of carbon monoxide is too high, the user can know the warning message through the mobile device.
(9976460), Xu Zhang. "Model-based co-design of sensing and control systems for turbo-charged, EGR-utilizing spark-ignited engines." Thesis, 2021.
Знайти повний текст джерелаLin, Yang-Hsuan, and 林暘烜. "A Rate-aware Power Control Algorithm Based on Implicit Feedback in Multi-rate Carrier-sensing Wireless Environments." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cf3v3z.
Повний текст джерела國立交通大學
電信工程研究所
104
In IEEE 802.11, when a device attempts to transmit information on the wireless channel, it first detects the channel condition based on CSMA/CA in order to avoid collisions. RTS/CTS mechanisms have been introduced to solve the collision issues. However, whether the receiver successfully receives a packet depends on SINR requirement at the receiver. By using physical carrier sense, some transmitting attempts around the receiver can be reduced, but corresponding hidden and exposed terminal problems occur. In order to reduce collisions at the receiver, we have to take transmitting rate, the distance between transmission pair and interference into consideration. In RTS/CTS mechanisms, by combining physical carrier sense with virtual carrier sense, it is possible that more severe exposed terminal problem will take place. Therefore, in order to reduce the interference level and collision at receiver, we have to consider the environment at the receiver. In this thesis, we propose a Rate-aware Power Control (RPC) algorithm with busy tone support to reduce interference and collisions in carrier-sensing wireless networks. By utilizing busy tone, the receiver informs the neighboring nodes of its SINR requirement, and then the transmitting nodes determine a suitable transmitting power and rate. In this way, other receiving nodes will be able to tolerate this interference within the SINR requirement. The goal of RPC is to maximize the network throughput and reduce the interference at receiver. We use network simulator ns-2 to evaluate the performance of RPC and compare with related mechanisms. Simulation results demonstrate that our RPC protocol improves the system throughput significantly.
Lin, Shih-Gang, and 林士剛. "A polling-based dynamic bandwidth allocation access control mechanism for a physiological signal sensing system using ZigBee." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/69845904827475199058.
Повний текст джерела國立雲林科技大學
資訊工程研究所
99
It is well known that the TDMA-based mechanism shows good performance in case of numerous device in WPAN but it still has a problem, which will decrease the performance because of too much control frame occupied. It leads to decreasing the throughput and effective bandwidth. In this paper, we propose polling-based dynamic bandwidth allocation (PDBA) access control mechanism to address above problems basically raised form GST mechanism and MPCP mechanism. From the simulations, the PDBA scheme has increased throughput and decrease delay than CSMA/CA scheme as it solve the contention among the devices. And also increased throughput and effective bandwidth than Channel Access Control Scheme by using PDBA scheme to decrease the amount of the control frames and the idle time.
Chen, Kuan-Hung, and 陳冠宏. "Development of a Force-sensing Grip and Control System for Robot Walking Helper Based on Elderly’s Demand." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/c4e59d.
Повний текст джерела國立交通大學
電控工程研究所
107
In recent years, elderly caring becomes imperative in our society along with the increasing of the aging population. One serious problem for the elder is the walking disability. Consequently, many pieces of research have been devoted to robot walking helper. In this thesis, we observe the trend of the walking helper market. According to the commercial types of grips, we design a force-sensing grip that fits the need of the elderly. We then apply the Lasso model to recognize user’s intention by inferring the relationship between user’s intention and the measured force. While user’s intention derived, it can be sent to the walking helper to assist the user. Experiments are conducted to evaluate the performance of the proposal.
Liu, Hsing-Fu, та 劉星甫. "THE STUDY OF SURFACE PLASMON RESONANCE OPTICAL FIBER- 400 ?慆 SENSORS BASED ON TiO2 COATING FOR SENSITIVITY IMPROVEMENT AND WAVELENGTH CONTROL IN SENSING". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/96671229685193272392.
Повний текст джерела大同大學
光電工程研究所
98
Surface Plasmon Resonance(SPR)technique has been widely used in the chemical and biological properties and molecular interaction detection. Conventional SPR sensors have the advantages of high sensitivity, real-time dynamic measurement capability, and in the biological sensing without the use of labels. Besides, fiber itself has small size, low cost, and high compatibility with the requirement of SPR sensing and applications. In this paper, the SPR fiber sensors we proposed enable us to combine the advantages of optical fiber and multilayer SPR sensing structure to develop a new type of SPR fiber sensor, for detecting the small refractive index change of the medium or monitoring the thickness during the nano thin film deposition. The multi-mode fiber we proposed in this paper with the core diameter of 400 ?慆 is prepared as a sensor platform, for the SPR measurement after the multi-layer TiO2/Au films were coated on the side-polished surface. We adjust the thickness of TiO2 film that coated on the Au thin film surface to shift the guided light SPR absorption from the ordinary region of the wavelength of 600-700 nm to the region of 1300-1550 nm that normally uses for the optical fiber communication. The SPR fiber sensors possessing SiO2/Au multi-layer structure can easily be integrated with existing optical fiber communication network as a smart fiber sensing system. Besides, the multi-layer structure we proposed can also enhance the SPR sensing sensitivity as well as increase the dynamic range of the SPR dip wavelength measurement. The experiment results show that the optimal sensitivity of the refractive index detection for the DI water and NaCl solution exhibits the ability as low as 3.47 ?~10-6 a.u., with the thickness of the TiO2 layer of 40 nm coated on the Au film surface.
Lan, Xiaodong. "Learning and monitoring of spatio-temporal fields with sensing robots." Thesis, 2015. https://hdl.handle.net/2144/13640.
Повний текст джерелаBirkett, Allison. "Nature, health and stress: a research-based approach to stress within our sensorial world." 2014. http://hdl.handle.net/1993/30083.
Повний текст джерелаWinfield, Tammy L. "Assessing landscape complexity using remotely sensed and field based measurements : does landscape complexity drive leafroller parasitism rates on Oregon caneberry farms?" Thesis, 2013. http://hdl.handle.net/1957/38004.
Повний текст джерелаGraduation date: 2013