Готові списки джерел за темами / GIS method

Добірка наукової літератури з теми "GIS method"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "GIS method"

1

Ding, Pei, Zhen Hua Yan, Fei Yue Ma, Liang Zhang, Jun Hao Li, and Yan Ming Li. "The Study of Vibration Diagnosis Method for GIS." Applied Mechanics and Materials 295-298 (February 2013): 2429–32. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.2429.

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Анотація:
Gas insulated switchgear (GIS) will generate vibration during normal operation for the electromagnetic force. There will be generate abnormal vibration when the contacts are undesirable, the guide rod stressed unevenness. Therefore, it can be effective in fault diagnosis of this machineries through the vibration test of GIS in field. The vibration detection method of GIS equipment in field is studied in this paper, the composition of the vibration detection system is described. The field test has been done using vibration detection system and the test results show that through the vibration signal detected from the GIS equipment, the vibration characteristics of GIS can be clarified and make the fault diagnosis effectively.
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2

Sang, Zhongqing, Xiaodong Gu, Yongxin Wang, Weiyun Jiang, and Wenjuan Cheng. "Waveform Correlation Analysis Method for Mechanical Characteristics of Circuit Breaker in Intelligent GIS Equipment." Journal of Physics: Conference Series 2218, no. 1 (March 1, 2022): 012054. http://dx.doi.org/10.1088/1742-6596/2218/1/012054.

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Анотація:
Abstract Gas-insulated electrical appliances (GIS) have the characteristics of small footprint and low cost. Therefore, GIS is widely used in intelligent substations. However, once the GIS fails, there will be shortcomings of long maintenance cycle, which seriously affects the normal life and production activities. Based on this, on the basis of summarizing and analyzing the GIS intelligent technology, this paper studies the correlation analysis method of the mechanical characteristic waveform of the intelligent GIS equipment circuit breaker from the aspects of equipment intelligence, device development and software development,corresponding theoretical guidance is provided for the practical application of intelligent GIS equipment circuit breakers.
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3

Mihai, Dana, and Mihai Mocanu. "Processing GIS Data Using Decision Trees and an Inductive Learning Method." International Journal of Machine Learning and Computing 11, no. 6 (November 2021): 393–98. http://dx.doi.org/10.18178/ijmlc.2021.11.6.1067.

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4

Rahmat, Saepul, and Riyani Prima Dewi. "Distribusi Medan Listrik di Kompartemen Busbar Gas Insulated Switchgear (GIS) Menggunakan Charge Simulation Method." E-JOINT (Electronica and Electrical Journal Of Innovation Technology) 1, no. 2 (December 27, 2020): 47–52. http://dx.doi.org/10.35970/e-joint.v1i2.436.

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Анотація:
Penelitian ini bertujuan untuk mengilustrasikan distribusi medan listrik di kompartemen busbar tipe gas insulated switchgear (GIS). Gas Insulated Substation (GIS) merupakan rangkaian peralatan gardu induk yang terpasang di dalam sebuah metal enclosure dan diisolasi oleh gas bertekanan yaitu Sulfur Hexafluoride (SF6). Dalam simulasi ini, diasumsikan titik referensi berada di sekitar contact pin busbar, dan titik muatan buatan berada disekitar kompartemen busbar. Simulasi dilakukan dengan menentukan titik referensi dan titik muatan bantuan untuk menghitung nilai muatan yang akan dicari yaitu contact pin. Titik muatan buatan ini terletak disembarang titik disekitar kompartemen busbar GIS dan akan dihitung nilai muatannya melalui metode simulasi muatan (charge simulation method) dengan bantuan komputasi Matlab
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5

Lv, Fang Cheng, Hu Jin, and Zhao Hua Zhang. "Typical Insulation Defects Partial Discharge Feature Extraction Research Based on AE Method." Applied Mechanics and Materials 668-669 (October 2014): 737–40. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.737.

Повний текст джерела
Анотація:
Gas insulated switchgears (GIS) occupy an important position in the power system. Feature extraction is the key to GIS partial discharge pattern recognition, but the dimension of feature space is high, based on this, the article introduce the principal component sparse thoughts, firstly, through the 252 kV GIS partial discharge simulation experiment platform, set up the typical GIS partial discharge models, and uses AE method to obtain the signals, and through the principal component contribution rate to decide the degree of sparse, and according to the sparse component and the number of original features to decide the characteristics of related components, the results show that using this method can realize effective extraction of characteristic, and enhance the clustering results.
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6

Li, Songyuan, Pengxian Song, Zhanpeng Wei, Xu Li, Qinghua Tang, Zhengzheng Meng, Ji Li, Songtao Liu, Yuhuai Wang, and Jin Li. "Partial Discharge Detection and Defect Location Method in GIS Cable Terminal." Energies 16, no. 1 (December 29, 2022): 413. http://dx.doi.org/10.3390/en16010413.

Повний текст джерела
Анотація:
The complex structure of gas-insulated switchgear (GIS) cable terminals leads to serious electric field concentration, which is a frequent fault position of a high-voltage cable system. At present, due to the differences in the frequency bands of sensors, various partial discharge detection technologies have certain differences in their scope of application and anti-interference performance, resulting in a low defect detection rate in GIS cable terminals. In this paper, a comprehensive diagnosis scheme is proposed, which integrates transient earth voltage (TEV), ultra-high frequency (UHF), high frequency (HF), and ultrasonic methods. Two abnormal discharge defects of GIS terminals in two 220 kV substations in Tianjin were tracked and monitored, and the joint diagnosis was carried out using the proposed scheme; the type of discharge defect and the phase sequence of the defect were determined, and the UHV was employed to precisely locate and analyze the defect source. Finally, through the disassembly analysis and electric field simulation of the GIS cable terminal, the accuracy and effectiveness of the discharge detection and location method were verified, providing a typical detection demonstration for the defect diagnosis of a GIS cable terminal.
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7

Gong, Duohu, Wentao Chen, Zhongqiang Zhan, and Dilyar·Dolkun. "Analysis of ultrasonic partial discharge characteristics of GIS’s reducing unit based on Finite Element Method." Journal of Physics: Conference Series 2237, no. 1 (March 1, 2022): 012016. http://dx.doi.org/10.1088/1742-6596/2237/1/012016.

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Анотація:
Abstract GIS’s reducing unit is a new and environment-friendly structural unit, which can greatly reduce the consumption of aluminum alloy material and insulating gas. The structural size of this unit is much smaller than the conventional one. In this paper, an acoustic-structure coupling interaction model of partial discharge in reducing unit of gas insulated switchgear (GIS) is presented. The interaction between the internal acoustic source of partial discharge and structure of GIS is simulated with the finite element analysis, and the acoustic pressure levels distribution of GIS is obtained. The results show that the sound pressure distribution of the reducing unit is basically the same as that of the conventional one, but the amplitude is larger. At the same time, the high-frequency part of the acoustic signal attenuates more quickly in the reducing unit. This paper provides a theoretical guidance basis for the ultrasonic partial discharge detection of the GIS reducing unit.
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8

Yu, Xiao. "GIS-Based Medical Resource Evaluation Method." Scientific Programming 2022 (August 3, 2022): 1–8. http://dx.doi.org/10.1155/2022/2742557.

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Анотація:
As one of the public service resources, medical and health care has a great guarantee for people’s healthy life and life safety and is an important part of ensuring the normal and orderly operation of urban functions. This paper takes the spatial pattern of urban medical resources in Hohhot as the research object and collects three types of urban medical resources, including clinics (health centers), specialized hospitals, and general hospitals, a total of 1300 sample points, based on GIS spatial analysis methods, using the average nearest neighbor, kernel density estimation method, standard deviation ellipse method, and accessibility measure to analyze the spatial distribution of medical resources. The results show that the medical resources in the urban area of Hohhot are all in a state of agglomeration, but due to the different functions of different types of medical resources, their distribution ranges and distribution directions also show different characteristics. Saihan District, Yuquan District in the southwest, has fewer medical facilities resources, and the distribution of the accessibility of the three types of medical facilities is quite different. Therefore, the spatial balance of comprehensive medical resources in the urban area of Hohhot needs to be further improved. The results of this paper have implications for the layout of medical facilities and planning has important reference significance.
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9

He, Liang, Jie Yang, Ziwei Zhang, Zongwu Li, Dengwei Ding, Minghu Yuan, Rong Li, and Mao Chen. "Research on Mechanical Defect Detection and Diagnosis Method for GIS Equipment Based on Vibration Signal." Energies 14, no. 17 (September 3, 2021): 5507. http://dx.doi.org/10.3390/en14175507.

Повний текст джерела
Анотація:
Gas insulated switchgear equipment (GIS) is widely used in power system, and more attention has been paid to discharge defects than mechanical defects. However, since mechanical defects are a major cause of the failure in GIS, it is of great significance to carry out relevant research on mechanical defects. Detection and diagnosis methods of mechanical defects based on vibration signal are studied in this paper. Firstly, vibration mechanisms of GIS are analyzed. Due to structural differences between single phase insulated type GIS and three phase insulated type GIS, there are big differences in vibration mechanisms between the two types of GISs. Secondly, experimental research on mechanical defects is carried out based on a 110 kV GIS equipment and a self-developed vibration detection system; results show that mechanical defects can be diagnosed by analyzing signal amplitude, frequency spectrum and waveform distortion rate, and a large current is more beneficial for diagnosing mechanical defects. Lastly, field application has been carried out on 220 kV GIS equipment, and a poor contact defect is found, demonstrating that abnormal diagnosis can be realized by method proposed in this paper. Experimental research and field application demonstrate the feasibility and effectiveness of detection and diagnosis method for mechanical defects based on vibration signal and provide experience for subsequent engineering application.
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10

Ana, Ricardo Santa, Marvin Muchametow, and Manjunath Ramesh. "New Method of Leak Rate Measurement in SF6 Free Medium Voltage Switchgear Using Helium and Ambient Air." B&H Electrical Engineering 15, no. 1 (October 1, 2021): 54–62. http://dx.doi.org/10.2478/bhee-2021-0006.

Повний текст джерела
Анотація:
Abstract The current medium voltage Gas Insulated Switchgears (GIS) predominantly use Sulphur Hexafluoride (SF6) as insulation medium. The leakage tests performed on GIS use either SF6 or Helium medium to ensure gas tightness. However, SF6 has been strictly regulated for the last years due to the high global warming potential effect on the planet. As a response, new technologies are emerging using air as insulation medium. The present work establishes a basic comparison of the leakage rate in a medium voltage GIS using two different leak detection methods: Helium leak detector and Residual Gas Analyser (RGA). Both methods use Helium and additionally RGA using air as tracer gas.
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Більше джерел

Дисертації з теми "GIS method"

1

Jani, Janmaizatulriah. "A GIS-based method for groundwater modelling." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574558.

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Анотація:
Groundwater is important and precious freshwater found under the earth's surface. Groundwater is used for human consumption: for drinking, farming and for maintaining surface water system (rivers) especially during low flow periods. For effective groundwater management, quantitative and qualitative status of groundwater is usually assessed using various groundwater models. These models (for example numerical models) are capable of modelling complex and heterogeneous groundwater conditions. However, due to the requirement of extensive and detailed ground water data, these models are not suitable to be applied in all groundwater systems (major and minor aquifers). Therefore, scientific studies in areas of insignificant groundwater resource (minor aquifers) have been underplayed. However, since all groundwater bodies are significantly important, a new groundwater model was developed in this study. GIS functionality was explored and a GIS-based groundwater model was developed using minimal and accessible input data. GIS was used to represent the subsurface geology particularly the aquifer system and to model groundwater flow. The first model, a GIS based geological model was tested by reconstructing the geology map for the Slea catchment, in the United Kingdom and thickness of the Lincolnshire Limestone aquifer was predicted. The advantage of this model is its capability in predicting an aquifer's thickness without referring to point data like those obtained from boreholes. Then, the second model that is based on topographical and groundwater resistance analysis was used to model natural ground water discharge. Although there is discrepancy between estimated and measured spring discharge, the model has confirmed the usefulness of using GIS tool in modelling groundwater exploring minimal input data and basic modelling procedures. The developed models were not a replacement for numerical groundwater models. However, they would be useful to screen ground water status especially in areas that lack ground water data.
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2

Yesilmurat, Serdar. "A Prefetching Method For Interactive Web Gis Applications." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611639/index.pdf.

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Анотація:
A Web GIS system has a major issue of serving the map data to the client applications. Since most of the GIS services provide their geospatial data as basic image formats like PNG and JPEG, constructing those images and transferring them over the internet are costly operations. To enhance this inefficient process, various approaches are offered. Caching the responses of the requests on the client side is the most commonly implemented solution. However, this method is not adequate by itself. Besides caching the responses, predicting the next possible requests of the client and updating the cache with the responses for those requests provide a remarkable performance improvement. This procedure is called &ldquo
prefetching&rdquo
. Via prefetching, caching mechanisms can be used more effectively and efficiently. This study proposes a prefetching algorithm called Retrospective Adaptive Prefetch (RAP). The algorithm is constructed over a heuristic method that takes the former actions of the user into consideration. This method reduces the user-perceived response time and improves users&rsquo
navigation efficiency. The caching mechanism developed takes the memory capacity of the client machine into consideration to adjust the cache capacity by default. Otherwise, cache size can be configured manually. RAP is compared with 4 other methods. According to the experiments, this study shows that RAP provides better performance enhancements than the other compared methods.
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3

Andersson, Emilia. "GIS as a method for handling environmental data from Antarctica." Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32774.

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Анотація:
The Swedish Polar Research Secretariat wants to compile all data from the Swedishenvironmental monitoring programme in Antarctica and present it using a Geographical Information System, GIS, in order to get a better follow-up on performed activities. The assignment of this master’s thesis has been to build a database containing geographic information for the areas around the Swedish research stations Wasa and Svea in Dronning Maud Land. The geodatabase will serve as a platform for future GIS-applications used by theSwedish Polar Research Secretariat.The work is divided into three parts, project planning, project development and an analysis. Apart of the project planning consisted of a survey of the environmental monitoring programmeand the existing data. A number of shortcomings in the existing data were discovered duringthe survey, it was therefore decided to amend the environmental monitoring programme andupdate the data handling methods in order to get better-suited data to use in a GIS.The choice of GIS-software fell on ArcGIS ArcView 9.2 from ESRI and data from theAntarctic Digital Database was used as a basemap. Additional data from the Antarctic DigitalDatabase was used in order to build the database. A file geodatabase structure was chosen which consists of a number of feature datasets containing all the geographical information.An analysis and a discussion about the existing monitoring programme have been performed and proposals on how to improve the monitoring programme have been presented.
www.ima.kth.se
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4

Lenander, Ann-Sofi. "A GIS-Based Method of Deriving Spatially Distributed Unit Hydrographs." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297671.

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Анотація:
Prior to using hydraulic and spatially distributed modelling softwares, the theory of the unit hydrograph was a commonly used tool for modelling of surface and runoff water. While distributed models often provide detailed results from extensive calculation durations, the unit hydrograph have been questioned for simplifying the physical characteristics of the watershed modelled. Typically, the unit hydrograph theory does not explicitly take the flow paths of the watershed in consideration during calculation. With the rise of geographical information systems, methods of deriving spatially distributed unit hydrographs have been developed. The aim of these have commonly been to find a spatially varied form of hydrological modelling, while still keeping the computation times low. The method is commonly built by calculating the travel time to the watershed outlet along the flow path. In this study, spatially distributed unit hydrographs are derived separately for the watershed’s pervious and impervious surfaces in a Python script using map algebra and the Esri’s Python wrapper module Arcpy. The travel times are generated from a velocity field calculated using Maidment and Olivera’s velocity equation. The velocity equation contains three unknown parameters; one for an average velocity and two calibration parameters. The excess precipitation is calculated of a 100 year return period Chicago Design Storm hyetograph using the SCS-CN method. The direct runoff hydrographs are calculated over three semi-urban watersheds in Smedby in southern Sweden, and the results are compared to MIKE 21 hydrograph data of each corresponding watershed and rain input. The result obtained showed to replicate the hydrograph response quite well, but only if the unknown parameters in the velocity equation were calibrated to match the MIKE 21 data. The unknown parameters of the velocity equations produces uncertainties of using the method without calibration data, which implies that the script is not well adapted to use for modelling predictions. It may be of interest to calculate the travel times of the locations within the watershed using a different formula. The script tool could be tested using different design storms as input, and areas of different characteristics compared to Smedby could be tested.
Innan det blev vanligt att använda hydrauliska och rumsliga modellerings- mjukvaror användes ofta teorin bakom enhetshydrografen för modellering av avrinning. Medan de rumsliga mjukvarorna ofta erbjuder detaljerade resultat till priset av långa beräkningstider, har enhetshydrografen ifrågasatts för att förenkla den fysiska karaktären av avrinningsområdet. Typiskt sett tar inte enhetshydrografen avrinningsområdets flödesvägar direkt i hänseende vid beräkning. Utveckling och ökad tillgänglighet av geografiska informations- system förenklade möjligheterna att utveckla beräkning av enhetshydrografer som tar hänsyn till avrinningsområdets karaktär, typiskt sett genom att beräkna rinntiden från varje läge i avrinningsområdet, längs rinnvägarna och till utloppet. I den här studien beräknas spatiala enhetshydrografer separat för avrinningsområdets hårdgjorda och icke hårdgjorda ytor, genom att utveckla ett Python skript med hjälp av karalgebra och Esri’s wrapper modul ArcPy. Rinntiderna från olika lägen i avrinningsområdet beräknas med Maidments och Oliveras formel för hastighet, vilken innehåller okända parametrar för en uppskattad medelhastighet samt två kalibreringsparametrar. Effektivt regn från ett Chicago Design Storm regn med en återkomsttid på 100 år beräknas med hjälp av SCS-CN metoden. Hydrograferna för direkt avrinning faltas för tre semi-urbana avrinningsområden i Smedby i södra Sverige för att sedan jämföras mot MIKE 21 genererad hydrograf data för respektive motsvarade avrinningsområde. Hydrografdata producerat av MIKE 21 har tagits fram med lika CDS-regn data som input. Resultatet visar att hydrografer snarlika MIKE 21 hydrograferna kan tas fram med Maidments spatialt fördelade enhetshydrograf, om de okända parametrarna i Maidments formel kalibrerades mot MIKE 21 data. Utan kalibreringsdata för att bestämma de okända parametrarna kan resultatet anses vara mycket osäkert, vilket antyder att Python skriptet ej bör användas för använda metoden för att förutspå responser av regnevent. Andra beräkningar än Maidments ekvation kan vara av intresse att implementera. Olika typer av regninput samt spatial data över andra platser än Smedby kan vara av intresse att testa Python skriptet för.
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5

Pirnia, Seyed Amir. "A Groundwater Vulnerability Assessment Method Using GIS and Multivariate Statistics - Gotland, Sweden." Thesis, KTH, Mark- och vattenteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99343.

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Анотація:
Concentrations of microorganisms and chemical components in groundwater are serious threats for groundwater resources sustainability and contribute to technical and health problems. Recent studies and reports in Gotland revealed huge concerns about water quality in the area. In this master thesis a range of methods such as GIS and statistical analysis including multivariate analysis and non-parametric analysis, have been used in order to identify natural and human factors which affect groundwater contamination. Main focus of the study was on using existing data and available databases in analyses. Consequently, several important factors such as land use, overlaying soil cover, soil thickness, bedrock, elevation, distance to deformation and fracture zones and slope were evaluated considering 8 variables including micro-organisms and chemical components. The results clarified several significant factors which statistically affected the micro-biological and chemical components of groundwater. These relations can be used for development of risk maps which can be used in spatial planning.
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6

Dickerson, Thomas Ashby. "Development and Evaluation of the Profile Synthesis Method for Approximate Floodplain Redelineation." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35847.

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Анотація:
In the United States, the floodplain maps used in the administration of the National Flood Insurance Program are created and maintained by the Federal Emergency Management Agency. Currently, a nationwide map modernization program is underway to convert the existing paper floodplain maps into a digital format, while continuing to improve the maps and expand the scope of the studies. The flood zones depicted on these maps are developed through engineering studies, using a variety of accepted methods to model and predict flood-prone areas. These methods are classified as detailed, limited detailed, or approximate, corresponding to varying levels of expense and accuracy. Current flood map revision activities across the nation typically consist of developing new hydraulic models, or reusing existing hydraulic model results in conjunction with new, more detailed LiDAR terrain models.

This research develops a profile synthesis method for redelineation of approximate flood boundaries, and evaluates the methodâ s performance and usability. The profile synthesis method is shown to perform reliably on simple floodplain geometry, recreating a water surface profile based only on its floodplain boundaries. When applied to a real-world floodplain studied in a previous flood insurance study, the profile synthesis method is shown to perform adequately, with results comparable to an approximate hydraulic model developed in HEC-RAS. Methods similar to this profile synthesis method for reuse of existing approximate zone boundaries have not been widely documented or evaluated; nevertheless, methods such as this are believed to be common in the revision of approximate zone flood boundaries. As such, this work explores concepts which will be of interest to individuals actively involved in flood map revision and modernization.
Master of Science

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7

Chen, Mi. "Using an integrated linkage method to predict hydrological responses of a mixed land use watershed." Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu.

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Анотація:
Thesis (Ph. D.)--Ohio State University, 2003.
Title from first page of PDF file. Document formatted into pages; contains xvi, 378 p.; also includes graphics (some col.). Includes bibliographical references (p. 229-252). Available online via OhioLINK's ETD Center
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8

Argany, Meysam. "Development of a GIS-based method for sensor network deployment and coverage optimization." Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25829.

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Анотація:
Au cours des dernières années, les réseaux de capteurs ont été de plus en plus utilisés dans différents contextes d’application allant de la surveillance de l’environnement au suivi des objets en mouvement, au développement des villes intelligentes et aux systèmes de transport intelligent, etc. Un réseau de capteurs est généralement constitué de nombreux dispositifs sans fil déployés dans une région d'intérêt. Une question fondamentale dans un réseau de capteurs est l'optimisation de sa couverture spatiale. La complexité de l'environnement de détection avec la présence de divers obstacles empêche la couverture optimale de plusieurs zones. Par conséquent, la position du capteur affecte la façon dont une région est couverte ainsi que le coût de construction du réseau. Pour un déploiement efficace d'un réseau de capteurs, plusieurs algorithmes d'optimisation ont été développés et appliqués au cours des dernières années. La plupart de ces algorithmes reposent souvent sur des modèles de capteurs et de réseaux simplifiés. En outre, ils ne considèrent pas certaines informations spatiales de l'environnement comme les modèles numériques de terrain, les infrastructures construites humaines et la présence de divers obstacles dans le processus d'optimisation. L'objectif global de cette thèse est d'améliorer les processus de déploiement des capteurs en intégrant des informations et des connaissances géospatiales dans les algorithmes d'optimisation. Pour ce faire, trois objectifs spécifiques sont définis. Tout d'abord, un cadre conceptuel est développé pour l'intégration de l'information contextuelle dans les processus de déploiement des réseaux de capteurs. Ensuite, sur la base du cadre proposé, un algorithme d'optimisation sensible au contexte local est développé. L'approche élargie est un algorithme local générique pour le déploiement du capteur qui a la capacité de prendre en considération de l'information spatiale, temporelle et thématique dans différents contextes d'applications. Ensuite, l'analyse de l'évaluation de la précision et de la propagation d'erreurs est effectuée afin de déterminer l'impact de l'exactitude des informations contextuelles sur la méthode d'optimisation du réseau de capteurs proposée. Dans cette thèse, l'information contextuelle a été intégrée aux méthodes d'optimisation locales pour le déploiement de réseaux de capteurs. L'algorithme développé est basé sur le diagramme de Voronoï pour la modélisation et la représentation de la structure géométrique des réseaux de capteurs. Dans l'approche proposée, les capteurs change leur emplacement en fonction des informations contextuelles locales (l'environnement physique, les informations de réseau et les caractéristiques des capteurs) visant à améliorer la couverture du réseau. La méthode proposée est implémentée dans MATLAB et est testée avec plusieurs jeux de données obtenus à partir des bases de données spatiales de la ville de Québec. Les résultats obtenus à partir de différentes études de cas montrent l'efficacité de notre approche.
In recent years, sensor networks have been increasingly used for different applications ranging from environmental monitoring, tracking of moving objects, development of smart cities and smart transportation system, etc. A sensor network usually consists of numerous wireless devices deployed in a region of interest. A fundamental issue in a sensor network is the optimization of its spatial coverage. The complexity of the sensing environment with the presence of diverse obstacles results in several uncovered areas. Consequently, sensor placement affects how well a region is covered by sensors as well as the cost for constructing the network. For efficient deployment of a sensor network, several optimization algorithms are developed and applied in recent years. Most of these algorithms often rely on oversimplified sensor and network models. In addition, they do not consider spatial environmental information such as terrain models, human built infrastructures, and the presence of diverse obstacles in the optimization process. The global objective of this thesis is to improve sensor deployment processes by integrating geospatial information and knowledge in optimization algorithms. To achieve this objective three specific objectives are defined. First, a conceptual framework is developed for the integration of contextual information in sensor network deployment processes. Then, a local context-aware optimization algorithm is developed based on the proposed framework. The extended approach is a generic local algorithm for sensor deployment, which accepts spatial, temporal, and thematic contextual information in different situations. Next, an accuracy assessment and error propagation analysis is conducted to determine the impact of the accuracy of contextual information on the proposed sensor network optimization method. In this thesis, the contextual information has been integrated in to the local optimization methods for sensor network deployment. The extended algorithm is developed based on point Voronoi diagram in order to represent geometrical structure of sensor networks. In the proposed approach sensors change their location based on local contextual information (physical environment, network information and sensor characteristics) aiming to enhance the network coverage. The proposed method is implemented in MATLAB and tested with several data sets obtained from Quebec City spatial database. Obtained results from different case studies show the effectiveness of our approach.
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9

Corner, Robert J. "Knowledge representation in geographic information systems." Thesis, Curtin University, 1999. http://hdl.handle.net/20.500.11937/928.

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In order to satisfy increasing demand for better, smarter, more flexible land resource information an alternative form of representation is proposed. That representation is to be achieved through the coupling of Expert System methods and Geographic Information Systems. Instead of representing resource information using entities such as soil types, defined by rigid boundaries on a map, a more fluid presentation is proposed. Individual resource attributes will be represented by surfaces that describe their probability of occurrence, at a number of levels, across a landscape. Such flexible representations, which are designed to better capture the mental models behind their creation, are capable of being combined and synthesised to answer a wide range of resource queries.An investigation of methods of knowledge representation in a number of fields of research, led to the belief that a Bayesian Network provides a representational calculus that is appropriate to the "fuzzy" and imprecise conceptual models used in resource assessment. The fundamental mathematical principles of such networks have been tailored to provide a representation that is in tune with the intuitive processes of a surveyor's thinking.Software has been written to demonstrate the method and tested on a variety of data sets from Australia and overseas. These tests and demonstrations have used a range of densities of knowledge and range of acuity in evidential data. In general the results accord with the mental models used as drivers. A number of operational facets of the method have been highlighted during these demonstrations and attention has been given to a discussion of them.
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10

Surmeli, Biricik Gozde. "Relationship Between Settlement Location And Morphological Landform: A Gis Method Applied To Cankiri Province." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1079292/index.pdf.

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This study aims to develop a method to investigate the relationship between settlement locations and the morphological landforms using geographical information systems (GIS). The method is applied to Ç
ankiri province, a mountainous terrain, which is covered in seventy-seven sheets of topographic maps at 1:25.000 scale. Three databases are created and used in this study: 1) Settlement database comprising various topographic and landform attributes of 891 settlements, 2) Morphological landform database composed of 4042 landform polygon elements digitized from 1:25.000 topographic maps, and 3) Topographic database containing the digital elevation model of the area and its derivatives. The first step in the algorithm is to classify the area into four main landform classes, namely, valley, slope, flood and top. Unsuitable landforms are then clipped out based on the thresholds derived from three topographic properties (elevation, slope and aspect). Accordingly, about 2 % of the settlements and 12 % of the area are removed. The relationship is investigated using the percentages of remaining settlements and landform classes. Further analyses such as position of the settlement within the landform polygon and type of the nearest landforms are carried out for final interpretation. Following conclusions are reached on the relationship between settlement location and morphological landforms: - Percentages of settlements for flood, valley, slope and top are 8.37, 27.52, 58.60 and 5.50, respectively. Considering the percentages of the landforms provided in the area, however, valley is the most preferred landform followed by flood type. Slope and top landforms are less preferred. About 86 % of the settlements are concentrated along valley-slope boundary. - Morphological boundaries of flood and top landforms are consistent with the settlement zones. The valley-slope boundary, on the other hand, which is the most populated area, cross-cut the settlements zones.
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Книги з теми "GIS method"

1

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. 6th ed. Harlow: LongmanScientific & Technical, 1993.

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2

David, Rhind, Connolly Teresa, Environmental Systems Research Institute (Redlands, Calif.), and Birbeck College, eds. Understanding GIS: The ARC/INFO method. Redlands, CA, USA: Environmental Systems Research Institute, 1994.

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3

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. 6th ed. Redlands: Environmental Systems Research Institute, 1992.

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4

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. Redlands, California: Environmental Systems Research Institute, 1991.

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5

David, Rhind, Connolly Teresa, Environmental Systems Research Institute (Redlands, Calif.), and Birkbeck College, eds. Understanding GIS: The ARC/INFO method. Redlands, CA, USA: Environmental Systems Research Institute, 1990.

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6

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. Redlands, California: Environmental Systems Research Institute, 1990.

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7

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. Harlow, Essex, England: Longman Scientific and Technical, 1993.

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8

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method. [Redlands, Calif.]: Environmental Systems Research Institute, 1995.

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9

Institute, Environmental Systems Research, ed. Understanding GIS: The ARC/INFO method : self-study workbook. Redlands, Calif: ESRI, 1996.

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10

David, Rhind, Connolly Theresa, Environmnetal Systems Research Institute (Redlands, Calif.), and Birbeck College, eds. Understanding GIS: The ARC/INFO method : self-study workbook : PC version. Redlands, Calif: Environmental Systems Research Institute, 1995.

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Частини книг з теми "GIS method"

1

Zhou, Xiaobo, and Henry Lin. "Screening Method." In Encyclopedia of GIS, 1. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23519-6_1170-2.

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Zhou, Xiaobo, and Henry Lin. "Screening Method." In Encyclopedia of GIS, 1849. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-17885-1_1170.

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3

Zhou, Xiaobo, and Henry Lin. "Screening Method." In Encyclopedia of GIS, 1027. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_1170.

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4

Shekhar, Shashi, and Hui Xiong. "Spatial Access Method." In Encyclopedia of GIS, 1073. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_1237.

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Shekhar, Shashi, and Hui Xiong. "Threshold Accepting Method." In Encyclopedia of GIS, 1151. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_1382.

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Shekhar, Shashi, and Hui Xiong. "Factor Screening Method." In Encyclopedia of GIS, 309. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_402.

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Shekhar, Shashi, and Hui Xiong. "Access Method, High-Dimensional." In Encyclopedia of GIS, 10. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_15.

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Shekhar, Shashi, and Hui Xiong. "Record-to-Record Travel Method." In Encyclopedia of GIS, 955. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_1092.

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9

Dai, Jing, and Chang-Tien Lu. "Concurrency Control for Spatial Access Method." In Encyclopedia of GIS, 1–6. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23519-6_176-2.

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Dai, Jing, and Chang-Tien Lu. "Concurrency Control for Spatial Access Method." In Encyclopedia of GIS, 286–91. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-17885-1_176.

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Тези доповідей конференцій з теми "GIS method"

1

Liu Tao, AiTing Hua, and Zheng Li. "Research on conversion method of 2D-GIS to 3D-GIS of pipeline." In 2010 Second International Conference on Computational Intelligence and Natural Computing (CINC). IEEE, 2010. http://dx.doi.org/10.1109/cinc.2010.5643831.

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2

Chen, Zhenjie, Manchun Li, Haiyue Fu, and Dong Chen. "GIS based quantification method of spatial competition." In Geoinformatics 2007, edited by Peng Gong and Yongxue Liu. SPIE, 2007. http://dx.doi.org/10.1117/12.764675.

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3

"A GIS DATA UPDATING METHOD WITH VIDEO." In International Conference on Computer Graphics Theory and Applications. SciTePress - Science and and Technology Publications, 2012. http://dx.doi.org/10.5220/0003856905110514.

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4

Zhou Zhen-min, Wang Xuechao, and Zhou Ke. "Rainfall-runoff forecast method based on GIS." In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5987467.

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5

Suwarno, P. Caesario, and P. Anita. "Partial discharge diagnosis of Gas Insulated Station (GIS) using acoustic method." In 2009 International Conference on Electrical Engineering and Informatics (ICEEI). IEEE, 2009. http://dx.doi.org/10.1109/iceei.2009.5254733.

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6

Renault, Stephane, and Dominique Meizel. "GPS/GIS Localization using a Set Membership Method." In 2006 IEEE 12th Digital Signal Processing Workshop & 4th IEEE Signal Processing Education Workshop. IEEE, 2006. http://dx.doi.org/10.1109/dspws.2006.265447.

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7

Hang Chen, Yongsheng Fu, and Larry Curtis Brown. "GIS based environmental analysis method for rural areas." In 2013 Kansas City, Missouri, July 21 - July 24, 2013. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2013. http://dx.doi.org/10.13031/aim.20131618988.

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Li, Shuang, Honggang Han, and Wei Zhang. "Discrimination method of power frequency ferroresonance in GIS." In 2012 China International Conference on Electricity Distribution (CICED). IEEE, 2012. http://dx.doi.org/10.1109/ciced.2012.6508683.

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9

Meiling, Wang, Yu Yong, Wang Qizhen, Yang Yi, and Liu Tong. "The construction method of GIS for autonomous vehicles." In 2013 9th Asian Control Conference (ASCC). IEEE, 2013. http://dx.doi.org/10.1109/ascc.2013.6606147.

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10

Qu, Liquan, Yuanzheng Shao, and Lianpeng Zhang. "Land suitability evaluation method based on GIS technology." In 2013 Second International Conference on Agro-Geoinformatics. IEEE, 2013. http://dx.doi.org/10.1109/argo-geoinformatics.2013.6621869.

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Звіти організацій з теми "GIS method"

1

Kline, D., D. Heimiller, and S. Cowlin. GIS Method for Developing Wind Supply Curves. Office of Scientific and Technical Information (OSTI), June 2008. http://dx.doi.org/10.2172/934390.

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2

Suhartono, Suhartono, Agoes Soegianto, and Achmad Amzeri. Mapping of land potentially for maize plant in Madura Island-Indonesia using remote sensing data and geographic information systems (GIS). EM International, November 2020. http://dx.doi.org/10.21107/amzeri.2020.1.

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Maize productivity in Indonesia was still low (5.241 tons/ha) compared to the average of the ten largest maize producing countries in the world (6.179 tons/ha). The potential for maize on the island of Madura is approximately 360,000 hectares. The potential for maize cultivation in Madura continues to decrease in land quality due to improper land clearing and land-use change. The purpose of this research was to make a map of land suitability for maize using Remote Sensing Data and Geographic Information System (GIS). The land suitability method for maize plants used satellite imagery as a data source, supported by fieldwork and secondary data. Data analysis using Geographic Information Systems (GIS). The results of the analysis of land suitability modeling based on agroecosystem potential found that most of the Madura area was suitable for maize cultivation. Madura island had a land area of 456,622.3ha for maize cultivation, where 170.379.5 (15.4%) was very appropriate, 211.412.3 ha (46.3%) was appropriate, 160,098.6 (35.1%) was less appropriate, and 14,732.0 ha (3.2%) was not appropriate.
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3

Yepez, Jeffrey. The Classical Lattice-Gas Method. Fort Belvoir, VA: Defense Technical Information Center, February 1999. http://dx.doi.org/10.21236/ada455835.

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4

Klymenko, Mykola V., and Andrii M. Striuk. Development of software and hardware complex of GPS-tracking. CEUR Workshop Proceedings, March 2021. http://dx.doi.org/10.31812/123456789/4430.

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The paper considers the typical technical features of GPS-tracking systems and their development, as well as an analysis of existing solutions to the problem. Mathematical models for the operation of hardware and software of this complex have been created. An adaptive user interface has been developed that allows you to use this complex from a smartphone or personal computer. Methods for displaying the distance traveled by a moving object on an electronic map have been developed. Atmega162-16PU microcontroller software for GSM module and GPS receiver control has been developed. A method of data transfer from a GPS tracker to a web server has been developed. Two valid experimental samples of GPS-trackers were made and tested in uncertain conditions. The GPS-tracking software and hardware can be used to monitor the movement of moving objects that are within the coverage of GSM cellular networks.
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5

Шестопалова (Бондар), Катерина Миколаївна, and Олена Петрівна Шестопалова. Support of Inclusive Education in Kryvyi Rig. Padua, Italy, 2019. http://dx.doi.org/10.31812/123456789/3234.

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An analysis of the system of training, the implementation of a pilot project "SUPPORT OF INCLUSIVE EDUCATION IN KRYVYI RIG". The team that worked in project by GIZ (Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH) create strategy for training teachers that include 6 modules: 1) regulatory and legislative framework for inclusive education; 2) inclusion ethics and philosophy; universal design and reasonable accommodation of educational space; 3) support team: interdisciplinary interation; algorithm of provision of psycho-pedagogical, corrective and development services; 4) individualization of the educational process; 5) competences of the teacher in inclusive education: strategies of teaching in inclusive education, method of collaborative learning, integration of technology into the discipline teaching methods, peculiarities of formation of mathematical concepts in children with special needs, difficulties with reading mastering and correction of dyslexia in children with special educational needs, correction and development of sense side of reading, development of intelligence of a child with SEN with the help of kinesiology methods, cooperation of teacher, psychologist and parents of a child with special educational needs, five levels can be associated with parents engagement; 6) work with children with behavior problems; resource room as the method of a child specific sensor needs satisfaction.
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6

Buettner, Leonard C., and Tara Sewell. Novel Method for Gas Phase Calibrations. Fort Belvoir, VA: Defense Technical Information Center, November 2010. http://dx.doi.org/10.21236/ada532941.

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7

Sinclair, Samantha, and Sandra LeGrand. Reproducibility assessment and uncertainty quantification in subjective dust source mapping. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41523.

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Accurate dust-source characterizations are critical for effectively modeling dust storms. A previous study developed an approach to manually map dust plume-head point sources in a geographic information system (GIS) framework using Moderate Resolution Imaging Spectroradiometer (MODIS) imagery processed through dust-enhancement algorithms. With this technique, the location of a dust source is digitized and recorded if an analyst observes an unobscured plume head in the imagery. Because airborne dust must be sufficiently elevated for overland dust-enhancement algorithms to work, this technique may include up to 10 km in digitized dust-source location error due to downwind advection. However, the potential for error in this method due to analyst subjectivity has never been formally quantified. In this study, we evaluate a version of the methodology adapted to better enable reproducibility assessments amongst multiple analysts to determine the role of analyst subjectivity on recorded dust source location error. Four analysts individually mapped dust plumes in Southwest Asia and Northwest Africa using five years of MODIS imagery collected from 15 May to 31 August. A plume-source location is considered reproducible if the maximum distance between the analyst point-source markers for a single plume is ≤10 km. Results suggest analyst marker placement is reproducible; however, additional analyst subjectivity-induced error (7 km determined in this study) should be considered to fully characterize locational uncertainty. Additionally, most of the identified plume heads (> 90%) were not marked by all participating analysts, which indicates dust source maps generated using this technique may differ substantially between users.
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8

Sinclair, Samantha, and Sandra LeGrand. Reproducibility assessment and uncertainty quantification in subjective dust source mapping. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41542.

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Анотація:
Accurate dust-source characterizations are critical for effectively modeling dust storms. A previous study developed an approach to manually map dust plume-head point sources in a geographic information system (GIS) framework using Moderate Resolution Imaging Spectroradiometer (MODIS) imagery processed through dust-enhancement algorithms. With this technique, the location of a dust source is digitized and recorded if an analyst observes an unobscured plume head in the imagery. Because airborne dust must be sufficiently elevated for overland dust-enhancement algorithms to work, this technique may include up to 10 km in digitized dust-source location error due to downwind advection. However, the potential for error in this method due to analyst subjectivity has never been formally quantified. In this study, we evaluate a version of the methodology adapted to better enable reproducibility assessments amongst multiple analysts to determine the role of analyst subjectivity on recorded dust source location error. Four analysts individually mapped dust plumes in Southwest Asia and Northwest Africa using five years of MODIS imagery collected from 15 May to 31 August. A plume-source location is considered reproducible if the maximum distance between the analyst point-source markers for a single plume is ≤10 km. Results suggest analyst marker placement is reproducible; however, additional analyst subjectivity-induced error (7 km determined in this study) should be considered to fully characterize locational uncertainty. Additionally, most of the identified plume heads (> 90%) were not marked by all participating analysts, which indicates dust source maps generated using this technique may differ substantially between users.
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9

Cornwall, J., K. Case, C. Callan, A. Despain, and F. Dyson. Non-GPS Methods of Geolocation. Fort Belvoir, VA: Defense Technical Information Center, January 2002. http://dx.doi.org/10.21236/ada399515.

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10

Aguilar, G., H. Waqa-Sakiti, and L. Winder. Using Predicted Locations and an Ensemble Approach to Address Sparse Data Sets for Species Distribution Modelling: Long-horned Beetles (Cerambycidae) of the Fiji Islands. Unitec ePress, December 2016. http://dx.doi.org/10.34074/book.008.

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In response to unique species in Fiji which are threatened or endangered, and in critical need of effective conservation measures to ensure their survival, author Glenn Aguilar has produced an eMedia publication and learning research tool, called GIS For Conservation.The eMedia website hosts tutorial material, videos and modelling results for conservation management and planning purposes. Users will learn spatial analytical skills, species distribution modelling and other relevant GIS tools, as well as enhance ArcMap skills and the species distribution modelling tool Maxent. Accompanying the GIS For Conservation website is a peer-reviewed research report. The report details the case study and research methods that have informed the eMedia publication, focusing on the development of maps predicting the suitability of the Fiji Islands for longhorned beetles (Cerambycidae) that include endemic and endangered species such as the Giant Fijian Beetle Xixuthrus heros.
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