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Готові списки джерел за темами / Local positioning systems

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Добірка наукової літератури з теми "Local positioning systems"

Автор: Grafiati

Опубліковано: 10 січня 2023

Оновлено: 28 січня 2023

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Статті в журналах з теми "Local positioning systems"

1

Leser, Roland, Arnold Baca, and Georg Ogris. "Local Positioning Systems in (Game) Sports." Sensors 11, no. 10 (October 19, 2011): 9778–97. http://dx.doi.org/10.3390/s111009778.

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2

Guevara, J., A. R. Jiménez, J. C. Prieto, and F. Seco. "Auto-localization algorithm for local positioning systems." Ad Hoc Networks 10, no. 6 (August 2012): 1090–100. http://dx.doi.org/10.1016/j.adhoc.2012.02.003.

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3

Wu, Lijun, and Fabio Casciati. "Local positioning systems versus structural monitoring: a review." Structural Control and Health Monitoring 21, no. 9 (January 19, 2014): 1209–21. http://dx.doi.org/10.1002/stc.1643.

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4

Gao, Honghao, Shuoping Wang, and Hongquan Lu. "Local Positioning Systems for Mobile Devices based on Ontology." Information Technology Journal 10, no. 1 (December 15, 2010): 168–74. http://dx.doi.org/10.3923/itj.2011.168.174.

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5

Borodko, A. "LOCAL POSITIONING TECHNOLOGIES FOR IIoT DEVICES." Telecom IT 9, no. 2 (July 28, 2021): 21–29. http://dx.doi.org/10.31854/2307-1303-2021-9-2-21-29.

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Research subject. The article discusses the technical and mathematical features of technologies and methods used in the construction of local positioning systems. Local positioning technologies. Method. Collection, analysis and comparison of published information on technologies in the field of local positioning. The main technologies and methods that allow solving the problem of local positioning are highlighted. Core results. In the course of the work carried out, a review of existing solutions in the field of local positioning was made, the main technologies and methods were highlighted that allow solving the problem of local positioning. The approaches to solving the problem of local positioning within the framework of the concept of the industrial Internet of things were considered and the main requirements were highlighted. Methods for increasing the positioning accuracy are considered. The most effective from the point of view of the industrial Internet of things have been identified. Practical relevance. The basis for the construction of a mathematical model has been prepared, consisting of analytical, algorithmic and simulation submodels. The model is proposed to be created according to the requirements put forward for the industrial positioning system.

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6

Averin, D., V. Borovytsky, and S. Tuzhanskyi. "Local Positioning Systems for Drones without Usage of Digital Cameras." Optoelectronic Information-Power Technologies 42, no. 2 (October 24, 2022): 5–11. http://dx.doi.org/10.31649/1681-7893-2021-42-2-5-11.

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The article describes drone positioning systems that ensure reliable takeoff, landing and delivery of cargo without the use of digital cameras and their classification. This classification includes all combinations of sources and receivers of radiation that may be located both on the drone and on the landing or cargo delivery area. An analysis of the advantages and disadvantages of each system and recommendations for choosing the best drone positioning system.

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7

Nowak, Thorsten, and Andreas Eidloth. "Dynamic multipath mitigation applying unscented Kalman filters in local positioning systems." International Journal of Microwave and Wireless Technologies 3, no. 3 (March 25, 2011): 365–72. http://dx.doi.org/10.1017/s1759078711000274.

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Multipath propagation is still one of the major problems in local positioning systems today. Especially in indoor environments, the received signals are disturbed by blockages and reflections. This can lead to a large bias in the user's time-of-arrival (TOA) value. Thus multipath is the most dominant error source for positioning. In order to improve the positioning performance in multipath environments, recent multipath mitigation algorithms based upon the concept of sequential Bayesian estimation are used. The presented approach tries to overcome the multipath problem by estimating the channel dynamics, using unscented Kalman filters (UKF). Simulations on artificial and measured channels from indoor as well as outdoor environments show the profit of the proposed estimator model. Furthermore, the quality of channel estimation applying the UKF and the channel sounding capabilities of the estimator are shown.

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8

Aguilera, Teodoro, Fernando J. Alvarez, David Gualda, Jose Manuel Villadangos, Alvaro Hernandez, and Jesus Urena. "Multipath Compensation Algorithm for TDMA-Based Ultrasonic Local Positioning Systems." IEEE Transactions on Instrumentation and Measurement 67, no. 5 (May 2018): 984–91. http://dx.doi.org/10.1109/tim.2018.2794939.

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9

Aguilera, Teodoro, Fernando J. Álvarez, José A. Paredes, and José A. Moreno. "Doppler compensation algorithm for chirp-based acoustic local positioning systems." Digital Signal Processing 100 (May 2020): 102704. http://dx.doi.org/10.1016/j.dsp.2020.102704.

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10

Rempel, Petr, and Alexey Borisov. "Local System of Positioning Using a Wifi Network." MATEC Web of Conferences 155 (2018): 01014. http://dx.doi.org/10.1051/matecconf/201815501014.

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The WiFi technology is widespread. To launch the WiFi network is very simply, thus, they meet so often. Knowledge of the location of the antennas Wi-fi is very important for internal localization (position fix of an object). System of positioning of Wi-fi (WPS) or WiPS/WFPS are used where GPS and GLONASS are unavailable because of different reasons including multipath and signal blocking indoors. Such systems include as well internal systems of positioning. Use of Wi-fi not for creation of a network, and (for example, positioning of devices on the WiFi network) is urgent for other purposes because there is a rapid growth at the beginning of the 21st century of wireless access points in urban areas. This article discusses practical application of a method of localization with use of WiFi of access points which is based on measurement of intensity of the received signal (indication of the received signal or RSSI). Here the device which executes the measurements necessary for system operation is described. Some formulas for computation of layout of the device are given. Results of system operation are considered with different layouts of access points in the given space and different environments.

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Дисертації з теми "Local positioning systems"

1

Shum, Chin Yiu. "Detecting, locating, and tracking mobile user within a wireless local area network." HKBU Institutional Repository, 2013. http://repository.hkbu.edu.hk/etd_ra/1512.

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2

Shetty, Ranjeet S. "A Real-Time Bi-Directional Differential Global Positioning System." Ohio University / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175006976.

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3

Wilcox, Martin Stuart. "Techniques for predicting the performance of time-of-flight based local positioning systems." Thesis, University College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429873.

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4

Dickman, Jeffrey. "Multipath limiting antenna design considerations for ground based pseudolite ranging sources." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1173814251.

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5

Morris, Lance A. "Local Positioning System." Thesis, California State University, Long Beach, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1523236.

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In Local Positioning System I explored urban areas on foot and displayed the results of my explorations in the Dutzi gallery. My primary impetus for this project was to gain a more complete understanding of my surroundings. In a Global Positioning System (GPS)-driven re-imagining of British artist Richard Long's walks, I tracked my wanderings using a smartphone and filtered the resulting data and imagery through mechanical methods of production such as laser cutting and screen-printing. I then incorporated this imagery into a much larger installation piece that led viewers through a scale model of my exploration, via a detailed path on the wall and illuminated light boxes on the floor to guide their path.

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6

Annamraju, Venu, and Kurt Kosbar. "CONCEPTUAL DESIGN OF CENTIMETER ACCURACY LOCAL POSITIONING SYSTEM." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607684.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada
This project investigates the feasibility of position detection in an office or industrial setting. The objective is to design a low-cost positioning system that uses the unlicensed 5.7 GHz ISM band, with centimeter accuracy and limited range. During the conceptual design phase of the system, indoor channel models will be investigated to determine which of a variety of architectures will be useful. For triangulating the position, an array of widely spaced stationary receivers and a mobile transmitter is proposed.

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7

Joram, Niko. "Design of a Dual Band Local Positioning System." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-186495.

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This work presents a robust dual band local positioning system (LPS) working in the 2.4GHz and 5.8GHz industrial science medical (ISM) bands. Position measurement is based on the frequency-modulated continuous wave (FMCW) radar approach, which uses radio frequency (RF) chirp signals for propagation time and therefore distance measurements. Contrary to state of the art LPS, the presented system uses data from both bands to improve accuracy, precision and robustness. A complete system prototype is designed consisting of base stations and tags encapsulating most of the RF and analogue signal processing in custom integrated circuits. This design approach allows to reduce size and power consumption compared to a hybrid system using off-the-shelf components. Key components are implemented using concepts, which support operation in multiple frequency bands, namely, the receiver consisting of a low noise amplifier (LNA), mixer, frequency synthesizer with a wide band voltage-controlled oscillator (VCO) having broadband chirp generation capabilities and a dual band power amplifier. System imperfections occurring in FMCW radar systems are modelled. Effects neglected in literature such as compression, intermodulation, the influence of automatic gain control, blockers and spurious emissions are modeled. The results are used to derive a specification set for the circuit design. Position estimation from measured distances is done using an enhanced version of the grid search algorithm, which makes use of data from multiple frequency bands. The algorithm is designed to be easily and efficiently implemented in embedded systems. Measurements show a coverage range of the system of at least 245m. Ranging accuracy in an outdoor scenario can be as low as 8.2cm. Comparative dual band position measurements prove an effective outlier filtering in indoor and outdoor scenarios compared to single band results, yielding in a large gain of accuracy. Positioning accuracy in an indoor scenario with an area of 276m² can be improved from 1.27m at 2.4GHz and 1.86m at 5.8GHz to only 0.38m in the dual band case, corresponding to an improvement by at least a factor of 3.3. In a large outdoor scenario of 4.8 km², accuracy improves from 1.88m at 2.4GHz and 5.93m at 5.8GHz to 0.68m with dual band processing, which is a factor of at least 2.8
Die vorliegende Arbeit befasst sich mit dem Entwurf eines robusten lokalen Positionierungssystems (LPS), welches in den lizenzfreien Frequenzbereichen für industrielle, wissenschaftliche und medizinische Zwecke (industrial, scientific, medical, ISM) bei 2,4GHz und 5,8GHz arbeitet. Die Positionsbestimmung beruht auf dem Prinzip des frequenzmodulierten Dauerstrichradars (frequency modulated continuous wave, FMCW-Radar), welches hochfrequente Rampensignale für Laufzeitmessungen und damit Abstandsmessungen benutzt. Im Gegensatz zu aktuellen Arbeiten auf diesem Gebiet benutzt das vorgestellte System Daten aus beiden Frequenzbändern zur Erhöhung der Genauigkeit und Präzision sowie Verbesserung der Robustheit. Ein Prototyp des kompletten Systems bestehend aus Basisstationen und mobilen Stationen wurde entworfen. Fast die gesamte analoge hochfrequente Signalverarbeitungskette wurde als anwendungsspezifische integrierte Schaltung realisiert. Verglichen mit Systemen aus Standardkomponenten erlaubt dieser Ansatz die Miniaturisierung der Systemkomponenten und die Einsparung von Leistung. Schlüsselkomponenten wurden mit Konzepten für mehrbandige oder breitbandige Schaltungen entworfen. Dabei wurden Sender und Empfänger bestehend aus rauscharmem Verstärker, Mischer und Frequenzsynthesizer mit breitbandiger Frequenzrampenfunktion implementiert. Außerdem wurde ein Leistungsverstärker für die gleichzeitige Nutzung der beiden definierten Frequenzbänder entworfen. Um Spezifikationen für den Schaltungsentwurf zu erhalten, wurden in der Fachliteratur vernachlässigte Nichtidealitäten von FMCW-Radarsystemen modelliert. Dazu gehören Signalverzerrungen durch Kompression oder Intermodulation, der Einfluss der automatischen Verstärkungseinstellung sowie schmalbandige Störer und Nebenschwingungen. Die Ergebnisse der Modellierung wurden benutzt, um eine Spezifikation für den Schaltungsentwurf zu erhalten. Die Schätzung der Position aus gemessenen Abständen wurde über eine erweiterte Version des Gittersuchalgorithmus erreicht. Dieser nutzt die Abstandsmessdaten aus beiden Frequenzbändern. Der Algorithmus ist so entworfen, dass er effizient in einem eingebetteten System implementiert werden kann. Messungen zeigen eine maximale Reichweite des Systems von mindestens 245m. Die Genauigkeit von Abstandsmessungen im Freiland beträgt 8,2cm. Positionsmessungen wurden unter Verwendung beider Einzelbänder durchgeführt und mit den Ergebnissen des Zweiband-Gittersuchalgorithmus verglichen. Damit konnte eine starke Verbesserung der Positionsgenauigkeit erreicht werden. Die Genauigkeit in einem Innenraum mit einer Grundfläche von 276m² kann verbessert werden von 1,27m bei 2,4GHz und 1,86m bei 5,8GHz zu nur 0,38m im Zweibandverfahren. Das entspricht einer Verbesserung um einen Faktor von mindestens 3,3. In einem größeren Außenszenario mit einer Fläche von 4,8 km² verbessert sich die Genauigkeit um einen Faktor von mindestens 2,8 von 1,88m bei 2,4GHz und 5,93m bei 5,8GHz auf 0,68m bei Nutzung von Daten aus beiden Frequenzbändern

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8

Myhrberg, Pontus, Emil Åberg, and David Nyman. "LPS, Local Positioning System : Småskaligt positioneringssystem baserat på avståndsmätning med ultraljud." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353407.

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Анотація:

Målet med projektet var att med ultraljudsteknik tillverka en produktsom kan bestämma positionen i ett område på 10x10 m. För att uppnådetta tillverkades tre enheter kapabla att sända och mottagaultraljudssignaler. Enheterna består av en ultraljudstransceiver, ettkretskort som kan skicka utsignal och förstärka insignal samt ettwifi-kompatibelt microkontrollerkort. Två av dessa enheter användessom referenspunkter med kända koordinater. Koordinaterna för dentredje beräknades genom att med ultraljud mäta avstånden tillreferenspunkterna. Den slutgiltiga produkten var kapabel att mätapositionen i ett område på 2x2 m. Iakttagelser påvisar däremot att ettstörre område bör vara möjligt med samma uppställning.

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9

Murray, Kevin Hugh. "An Optical Resection Local Positioning System for an Autonomous Agriculture Vehicle." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/45150.

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Obtaining accurate and precise position information is critical in precision and autonomous agriculture. Systems accurate to the centimeter-level are available, but may be prohibitively expensive for relatively small farms and tasks that involve multiple vehicles. Optical resection is proposed as a potentially more cost-effective and scalable positioning system for such cases. The proposed system involves the placement of optical beacons at known locations throughout the environment and the use of cameras on the vehicle to detect the apparent angles between beacons. The position of the vehicle can be calculated with resection when three or four beacons are identified. In addition, the system provides precise orientation information, so a separate inertial measurement unit is not required. The system is seen as potentially cost-effective by taking advantage of the precision and low cost of digital image sensors. Whereas the components in other positioning systems tend to be more specialized, the widespread consumer demand for inexpensive and high quality cameras has allowed for billions of dollars of research and development to be spread across billions of image sensors.
Master of Science

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10

Bartone, Chris Gregory. "Ranging airport pseudolite for local area augmentation using the global positioning system." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175095346.

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Книги з теми "Local positioning systems"

1

N, Plataniotis Konstantinos, and Venetsanopoulos, A. N. (Anastasios N.), 1941-, eds. WLAN positioning systems: Principles and applications in location-based services. Cambridge: Cambridge University Press, 2012.

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2

Tjom, P. T. Local area positioning system. Manchester: UMIST, 1997.

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3

SC-159, RTCA (Firm). Minimum operational performance standards for GPS local area augmentation system airborne equipment. Washington, DC: RTCA, 2008.

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4

Chen, Robert T. N. Acoustic flight tests of rotorcraft noise-abatement approaches using local differential GPS guidance. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1995.

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5

Chen, Robert T. N. Acoustic flight tests of rotorcraft noise-abatement approaches using local differential GPS guidance. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1995.

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6

SC-159, RTCA (Firm). GNSS-based precision approach local area augmentation system (LAAS) signal-in-space interface control document (ICD). Washington, DC: RTCA, Inc., 2008.

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7

Allen, Peyton M. Incorporation of a Differential Global Positioning System (DPGS) in the control of an unmanned aerial vehicle (UAV) for precise navigation in the Local Tangent Plane (LTP). Monterey, Calif: Naval Postgraduate School, 1997.

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8

Local Positioning Systems: LBS Applications and Services. CRC, 2006.

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9

Kolodziej, Krzysztof W., and Johan Hjelm. Local Positioning Systems: Lbs Applications and Services. Taylor & Francis Group, 2010.

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Kolodziej, Krzysztof W., and Johan Hjelm. Local Positioning Systems: LBS Applications and Services. Taylor & Francis Group, 2017.

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Частини книг з теми "Local positioning systems"

1

Clemente, Filipe Manuel, José Pino-Ortega, and Markel Rico-González. "Local Positioning Systems." In The Use of Applied Technology in Team Sport, 39–51. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003157007-5.

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Casciati, Fabio, and Li Jun Wu. "Positioning Systems: Global Versus Local." In Advanced Dynamics and Model-Based Control of Structures and Machines, 43–52. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0797-3_6.

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Díez-González, Javier, Rubén Álvarez, Paula Verde, Rubén Ferrero-Guillén, David González-Bárcena, and Hilde Pérez. "Stable Performance Under Sensor Failure of Local Positioning Systems." In Advances in Intelligent Systems and Computing, 499–508. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57802-2_48.

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4

Mosshammer, Ralf, Ralf Eickhoff, Mario Huemer, and Robert Weigel. "Integrated System and Network Simulation of a 5.8GHz Local Positioning System." In Computer Aided Systems Theory - EUROCAST 2009, 461–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04772-5_60.

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Aitenbichler, Erwin, Fernando Lyardet, Aristotelis Hadjakos, and Max Mühlhäuser. "Fine-Grained Evaluation of Local Positioning Systems for Specific Target Applications." In Ubiquitous Intelligence and Computing, 236–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02830-4_19.

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Zekavat, Seyed A. Reza. "An Introduction to the Fundamentals and Implementation of Wireless Local Positioning Systems." In Handbook of Position Location, 1169–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118104750.ch34.

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Lin, Chuan-Bi, Yung-Fa Huang, Long-Xin Chen, Yu-Chiang Chang, Z.-Ming Hong, and Jong-Shin Chen. "A Low-Costed Positioning System Based on Wearable Devices for Elders and Children in a Local Area." In Intelligent Information and Database Systems, 324–32. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75420-8_31.

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Ferrero-Guillén, Rubén, Javier Díez-González, Rubén Álvarez, and Hilde Pérez. "Analysis of the Genetic Algorithm Operators for the Node Location Problem in Local Positioning Systems." In Lecture Notes in Computer Science, 273–83. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61705-9_23.

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Klein, Günter, and Gerd Boedecker. "GPS-Observations in a Local Network Covering Big Height Differences." In Global Positioning System: An Overview, 90–94. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4615-7111-7_8.

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Sun, Peiliang. "Prison IOT Application—Local Area Positioning System." In Smart Prisons, 121–31. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9657-2_7.

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Тези доповідей конференцій з теми "Local positioning systems"

1

Kupiec, Stephen A., Wenjian Wang, and Tomasz P. Jannson. "WLAN encryption based on local positioning systems." In AeroSense 2002, edited by Edward M. Carapezza. SPIE, 2002. http://dx.doi.org/10.1117/12.479328.

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Al-Qudsi, B., E. Edwan, N. Joram, and F. Ellinger. "INS/FMCW radar integrated local positioning system." In 2014 DGON Inertial Sensors and Systems Symposium (ISS). IEEE, 2014. http://dx.doi.org/10.1109/inertialsensors.2014.7049478.

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3

Alvarez, Fernando J., and Roberto Lopez-Valcarce. "Multipath cancellation in broadband acoustic local positioning systems." In 2015 IEEE 9th International Symposium on Intelligent Signal Processing (WISP). IEEE, 2015. http://dx.doi.org/10.1109/wisp.2015.7139174.

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4

Krcmar, Marko, Viswanathan Subramanian, and Georg Boeck. "High performance CMOS receiver for local positioning systems." In 2009 IEEE Radio Frequency Integrated Circuits Symposium (RFIC). IEEE, 2009. http://dx.doi.org/10.1109/rfic.2009.5135506.

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Hehn, Markus, Martin Vossiek, Felix Dollinger, Karl Leo, Bahman Kheradmand-Boroujeni, and Frank Ellinger. "Optimized coil design for magnetic local positioning systems." In 2018 German Microwave Conference (GeMiC). IEEE, 2018. http://dx.doi.org/10.23919/gemic.2018.8335110.

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6

Kim, Youngmin, Jae Hyun Seo, and Heung Mook Kim. "A local positioning system based on VHF band." In 2016 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB). IEEE, 2016. http://dx.doi.org/10.1109/bmsb.2016.7521975.

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Eickhoff, Ralf, Niko Joram, Jens Wagner, Axel Strobel, and Frank Ellinger. "Design space exploration and hardware aspects of local positioning systems." In 2011 8th Workshop on Positioning, Navigation and Communication (WPNC). IEEE, 2011. http://dx.doi.org/10.1109/wpnc.2011.5961029.

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Pfeifer, T. "Secure cross-domain positioning architecture for autonomic systems." In The IEEE Conference on Local Computer Networks 30th Anniversary (LCN'05)l. IEEE, 2005. http://dx.doi.org/10.1109/lcn.2005.121.

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Tragas, Philippos, Antonis Kalis, Constantinos Papadias, Frank Ellinger, Ralf Eickhoff, Thomas Ussmuller, Ralf Mosshammer, et al. "RESOLUTION: Reconfigurable Systems for Mobile Local Communication and Positioning." In 2007 16th IST Mobile and Wireless Communications Summit. IEEE, 2007. http://dx.doi.org/10.1109/istmwc.2007.4299212.

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Otto, Philip, and Peter Gratzfeld. "Optimal Positioning of Wayside Energy Storage Systems in Local Transportation Networks." In 2021 Joint Rail Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/jrc2021-58018.

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Abstract Most local transport networks use a direct current supply, whose energy efficiency can be significantly increased with stationary energy storage systems. Simulation techniques are mostly used in studies on the integration of energy storage systems. Their aim is to determine the ideal location and the effectiveness of storage systems. In this paper, the basic relationships for the integration of storage systems are analysed. For this purpose, the braking process of electric rail vehicles is described and generally valid equations are derived. With these equations it is possible to understand the relevant relationships between the system parameters and to derive suitable storage locations. These can help operators to reduce the simulation effort.

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Звіти організацій з теми "Local positioning systems"

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Robert, J., and Michael Forte. Field evaluation of GNSS/GPS based RTK, RTN, and RTX correction systems. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41864.

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This Coastal and Hydraulic Engineering Technical Note (CHETN) details an evaluation of three Global Navigation Satellite System (GNSS)/Global Positioning System (GPS) real-time correction methods capable of providing centimeter-level positioning. Internet and satellite-delivered correction systems, Real Time Network (RTN) and Real Time eXtended (RTX), respectively, are compared to a traditional ground-based two-way radio transmission correction system, generally referred to as Local RTK, or simply RTK. Results from this study will provide prospective users background information on each of these positioning systems and comparisons of their respective accuracies during in field operations.

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Hui, H. A., N. K. Muetterties, and B. M. Wihl. Precision Local Positioning System. Office of Scientific and Technical Information (OSTI), August 2019. http://dx.doi.org/10.2172/1557043.

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Won, I. J. Local Positioning System for an Active UXO Sensor. Fort Belvoir, VA: Defense Technical Information Center, August 2009. http://dx.doi.org/10.21236/ada520500.

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Fernandez-Stark, Karina. Innovation and Competitiveness in the Copper Mining Global Value Chain: Developing Local Suppliers in Peru. Inter-American Development Bank, December 2021. http://dx.doi.org/10.18235/0003814.

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Peru is the second largest producer and exporter of copper in the world. However, the countrys sector has weak background linkages and the emergence of innovative suppliers able to provide high-value products and services is still incipient. This article explores the opportunities to leverage Perus international positioning in the mining industry to foster the development and innovation capacities of local suppliers. Based on data analysis and interviews with local industry stakeholders, this research--which uses the global value chain framework--finds that the incorporation of a larger number of high-value local suppliers into the copper value chain is limited by weaknesses in the national innovation system. In addition to this, it notes that the national copper policy places little emphasis in the need to innovate and add value. In order to generate a critical mass of strong and innovative suppliers, Peru must create solid institutions and coordination mechanisms to develop the sector. At the same time, it should favor the insertion of domestic suppliers into the value chain and incentivize these to innovate and scale. The article presents recommendations in these areas, as well as best practices from other mining countries that have successfully overcome these challenges.

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Pstuty, Norbert, Mark Duffy, Dennis Skidds, Tanya Silveira, Andrea Habeck, Katherine Ames, and Glenn Liu. Northeast Coastal and Barrier Network Geomorphological Monitoring Protocol: Part I—Ocean Shoreline Position, Version 2. National Park Service, June 2022. http://dx.doi.org/10.36967/2293713.

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Following a review of Vital Signs – indicators of ecosystem health – in the coastal parks of the Northeast Coastal and Barrier Network (NCBN), knowledge of shoreline change was ranked as the top variable for monitoring. Shoreline change is a basic element in the management of any coastal system because it contributes to the understanding of the functioning of the natural resources and to the administration of the cultural resources within the parks. Collection of information on the vectors of change relies on the establishment of a rigorous system of protocols to monitor elements of the coastal geomorphology that are guided by three basic principles: 1) all of the elements in the protocols are to be based on scientific principles; 2) the products of the monitoring must relate to issues of importance to park management; and 3) the application of the protocols must be capable of implementation at the local level within the NCBN. Changes in ocean shoreline position are recognized as interacting with many other elements of the Ocean Beach-Dune Ecosystem and are thus both driving and responding to the variety of natural and cultural factors active at the coast at a variety of temporal and spatial scales. The direction and magnitude of shoreline change can be monitored through the application of a protocol that tracks the spatial position of the neap-tide, high tide swash line under well-defined conditions of temporal sampling. Spring and fall surveys conducted in accordance with standard operating procedures will generate consistent and comparable shoreline position data sets that can be incorporated within a data matrix and subsequently analyzed for temporal and spatial variations. The Ocean Shoreline Position Monitoring Protocol will be applied to six parks in the NCBN: Assateague Island National Seashore, Cape Cod National Seashore, Fire Island National Seashore, Gateway National Recreation Area, George Washington Birthplace National Monument, and Sagamore Hill National Historic Site. Monitoring will be accomplished with a Global Positioning System (GPS )/ Global Navigation Satellite System (GNSS) unit capable of sub-meter horizontal accuracy that is usually mounted on an off-road vehicle and driven along the swash line. Under the guidance of a set of Standard Operating Procedures (SOPs) (Psuty et al., 2022), the monitoring will generate comparable data sets. The protocol will produce shoreline change metrics following the methodology of the Digital Shoreline Analysis System developed by the United States Geological Survey. Annual Data Summaries and Trend Reports will present and analyze the collected data sets. All collected data will undergo rigorous quality-assurance and quality-control procedures and will be archived at the offices of the NCBN. All monitoring products will be made available via the National Park Service’s Integrated Resource Management Applications Portal.

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Estimation of Vehicle Miles Traveled Based on Improved Ant Colony Algorithm. SAE International, December 2020. http://dx.doi.org/10.4271/2020-01-5195.

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Vehicle miles traveled (VMT) statistics is a key parameter which has many applications, such as the assessment of vehicle quality, evaluation of driving behavior and oil consumption, and other applications in vehicle monitoring system. In the earlier studies, the calculation of VMT usually focused on improving the accuracy and frequency of vehicle GPS data, but the VMT estimation error due to them were getting smaller with the development of positioning technology. Nowadays in the practical application of internet of vehicles, errors due to the out-of-order location data which caused by communication mechanism have become increasingly obvious. In this paper, we propose a VMT estimate method based on improved ant colony algorithm and local search method which is suitable for dealing with timestamp chaotic location data sequence. To evaluate our method, we use real-world vehicle data gathered by China mobile’s vehicle fleet management products, the analysis result shows the MRE of proposed ant colony algorithm is usually less than 8%, at least 3 percentage points lower than that of uniform motion distance accumulation statistics, at least 7 percentage points lower than that of Euclid distance accumulation statistics.

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