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Auswahl der wissenschaftlichen Literatur zum Thema „DJI“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 3. Februar 2022

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Zeitschriftenartikel zum Thema "DJI"

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Murata, Yoshinori, Shingo Sakurai, Efendi Mabruri, Toshiyuki Koyama und Masahiko Morinaga. „Cross Interdiffusion Coefficients in Nickel- and Iron-Based Ternary Alloys“. Defect and Diffusion Forum 273-276 (Februar 2008): 419–24. http://dx.doi.org/10.4028/www.scientific.net/ddf.273-276.419.

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It is known that two main interdiffusion coefficients, ık Dii and ık Djj , as well as two cross interdiffusion coefficients, ık Dij and ık Dji , are necessary for understanding the atomic diffusion for ternary system. Here, k is the host element of ternary system, and i and j are solute elements. These four interdiffusion coefficients are obtained from a series of experiments using two kinds of ternary diffusion couples. In general, it is believed that ık Dij and ık Dji indicate the same sign to each other, but there are a lot of experimental data showing that ık Dij and ık Dji indicate opposite sign [1]. In such a case, the physical meaning of the cross interdiffusion coefficient has not always been understood thoroughly. The purposes of this study are to measure the interdiffusion coefficients by a series of experiments and to elucidate the physical meaning of the two cross interdiffusion coefficients on the basis of the consideration about the relationship between the thermodynamic functions and the cross interdiffusion coefficients. It is concluded that ık Dij exhibits the opposite sign to ık Dji without contradicting the Onsarger’s reciprocity theorem when the ( 2 2 ) c j ∂ G ∂c shows the opposite sign to ( 2 2 ) c i ∂ G ∂c . Here, c G is Gibbs free energy of the ternary system.

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Rauschenbach, Thomas, Svendy Wittmann und Felix Berth. „Das Deutsche Jugendinstitut (DJI)“. Erziehungswissenschaft 30, Nr. 59 (2-2019) (13.12.2019): 55–61. http://dx.doi.org/10.3224/ezw.v30i2.07.

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Huang, Chia-Hsing, und Liang-Chun Ho. „The relationship between the bio-energy concept stocks in Taiwan and the international stock markets“. Corporate Ownership and Control 5, Nr. 4 (2008): 437–43. http://dx.doi.org/10.22495/cocv5i4c5p3.

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This research explores the relationship among the bio-energy company stock index in Taiwan, TAIEX, DJI, Nikkei 225 and SSE composite index for a period from January 1, 2005 to March 11, 2008. Test results indicate two things are noteworthy: 1. Granger causality tests show that the interaction between the bio-energy company stock index in Taiwan and TAIEX is one-way only; however, that between the bio-energy company stock index in Taiwan and DJI is two-way. 2. According to the results of variance decompositions, though TAIEX has the highest explanation power; nevertheless, the explanation strength tends to decrease. On the contrary, DJI and Nikkei 225 manifest constantly increasing strength in explanation. Accordingly, the influence of DJI upon the bio-energy company stock index in Taiwan keeps rising and can’t be ignored.

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Van den Hurk, Arie, und Annelies Jorna. „De DJI en de wetenschap“. PROCES 95, Nr. 5 (Oktober 2016): 41–56. http://dx.doi.org/10.5553/proces/016500762016095005006.

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Salma, N. M., und Khairuddin Osman. „Modelling and PID control system integration for quadcopter DJI F450 attitude stabilization“. Indonesian Journal of Electrical Engineering and Computer Science 19, Nr. 3 (01.09.2020): 1235. http://dx.doi.org/10.11591/ijeecs.v19.i3.pp1235-1244.

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<p><span style="font-family: Times New Roman;">In this paper we focus on the overall overview of the mathematical modelling of the DJI F450 UAV quadcopter, the hardware and software system integration based on PID control system for the attitude feedback. The parameter specification of the DJI F450 is fed into the mathematical model and implement a basic PID for the system. Future research using the DJI F450 model can benefit from this observation by implementing the modelling and tune in their own variable that varies, such as the overall of their weight. The data of PID control system simulation using the quadcopter frame model type DJI F450 parameter. The mathematical model for the quadcopter modelled DJI F450 is developed using Newton-Euler method. Altitude data for the control system is obtain from the analysis data of the Simulink simulation. The simulation is done using the Simulink toolbox inside the MATLAB software. From this paper, we can more understand the step involves in making a full control system of a quadcopter. The mathematical model for other type of quadcopter model can be implemented using the steps with their own parameter and achieve fast development.</span></p>

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Lisa Kustina, Samsul Anwar und Imas Mawar. „PENGARUH BURSA SAHAM GLOBAL TERHADAP INDEKS HARGA SAHAM GABUNGAN DI BURSA EFEK INDONESIA“. Jurnal Investasi 4, Nr. 1 (09.04.2018): 1–10. http://dx.doi.org/10.31943/investasi.v4i1.32.

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Tujuan Penelitian ini adalah untuk mengetahui pengaruh bursa saham global terhadap indeks harga saham gabungan di Bursa Efek Indonesia. Bursa saham global yang digunakan dalam penelitian ini adalah Dow Jones Index (DJI), Korea Stock Price Composite Index (KOSPI), Tokyo Stock Exchange (Nikkei heikin kabuki / Nikkei 225), dan Australian Securities Exchange (ASX). Sampel yang diteliti dalam penelitian ini adalah periode 2015 hingga 2017. Penelitian ini menggunakan regresi linear berganda untuk mengolah data penelitian. Hasil Penelitian ini menunjukkan bahwa Dow Jones Index (DJI), Korea Stock Price Composite Index (KOSPI), Tokyo Stock Exchange (Nikkei heikin kabuki / Nikkei 225), dan Australian Securities Exchange (ASX) secara parsial berpengaruh terhadap Indek Harga Saham Gabungan diIndonesia. Dow Jones Index (DJI), Korea Stock Price Composite Index (KOSPI), dan Australian Securities Exchange (ASX) berpengaruh signifikan pada tingkat signifikansi 0.000 sedangkan Tokyo Stock Exchange (Nikkei 225) pada tingkat signifikansi 0.001. The purpose of this study was to determine the effect of global stock exchanges on the composite stock price index on the Indonesia Stock Exchange. The global stock exchanges used in this study are the Dow Jones Index (DJI), the Korea Stock Price Composite Index (KOSPI), the Tokyo Stock Exchange (Nikkei Heikin Kabuki / Nikkei 225), and the Australian Securities Exchange (ASX). The sample examined in this study is the period 2015 to 2017. This study uses multiple linear regression to process research data. The results of this study indicate that the Dow Jones Index (DJI), the Korea Stock Price Composite Index (KOSPI), the Tokyo Stock Exchange (Nikkei Heikin Kabuki / Nikkei 225), and the Australian Securities Exchange (ASX) partially affect the Composite Stock Price Index in Indonesia. The Dow Jones Index (DJI), the Korea Stock Price Composite Index (KOSPI), and the Australian Securities Exchange (ASX) have a significant effect on the significance level of 0,000 while the Tokyo Stock Exchange (Nikkei 225) is at a significance level of 0.001.

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Taddia, Yuri, Francesco Stecchi und Alberto Pellegrinelli. „Coastal Mapping Using DJI Phantom 4 RTK in Post-Processing Kinematic Mode“. Drones 4, Nr. 2 (30.03.2020): 9. http://dx.doi.org/10.3390/drones4020009.

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Topographic and geomorphological surveys of coastal areas usually require the aerial mapping of long and narrow sections of littoral. The georeferencing of photogrammetric models is generally based on the signalization and survey of Ground Control Points (GCPs), which are very time-consuming tasks. Direct georeferencing with high camera location accuracy due to on-board multi-frequency GNSS receivers can limit the need for GCPs. Recently, DJI has made available the Phantom 4 Real-Time Kinematic (RTK) (DJI-P4RTK), which combines the versatility and the ease of use of previous DJI Phantom models with the advantages of a multi-frequency on-board GNSS receiver. In this paper, we investigated the accuracy of both photogrammetric models and Digital Terrain Models (DTMs) generated in Agisoft Metashape from two different image datasets (nadiral and oblique) acquired by a DJI-P4RTK. Camera locations were computed with the Post-Processing Kinematic (PPK) of the Receiver Independent Exchange Format (RINEX) file recorded by the aircraft during flight missions. A Continuously Operating Reference Station (CORS) located at a 15 km distance from the site was used for this task. The results highlighted that the oblique dataset produced very similar results, with GCPs (3D RMSE = 0.025 m) and without (3D RMSE = 0.028 m), while the nadiral dataset was affected more by the position and number of the GCPs (3D RMSE from 0.034 to 0.075 m). The introduction of a few oblique images into the nadiral dataset without any GCP improved the vertical accuracy of the model (Up RMSE from 0.052 to 0.025 m) and can represent a solution to speed up the image acquisition of nadiral datasets for PPK with the DJI-P4RTK and no GCPs. Moreover, the results of this research are compared to those obtained in RTK mode for the same datasets. The novelty of this research is the combination of a multitude of aspects regarding the DJI Phantom 4 RTK aircraft and the subsequent data processing strategies for assessing the quality of photogrammetric models, DTMs, and cross-section profiles.

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Çakır, Abdülkadir, und Seyit Akpancar. „ROS-Based Control of the DJI Matrice 100 Robot with QR Images Obtained from DJI Guidance“. International Journal of Engineering Trends and Technology 68, Nr. 1 (25.01.2020): 45–50. http://dx.doi.org/10.14445/22315381/ijett-v68i1p206.

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Stanković, Miloš, Mohammad Meraj Mirza und Umit Karabiyik. „UAV Forensics: DJI Mini 2 Case Study“. Drones 5, Nr. 2 (01.06.2021): 49. http://dx.doi.org/10.3390/drones5020049.

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Rapid technology advancements, especially in the past decade, have allowed off-the-shelf unmanned aerial vehicles (UAVs) that weigh less than 250 g to become available for recreational use by the general population. Many well-known manufacturers (e.g., DJI) are now focusing on this segment of UAVs, and the new DJI Mini 2 drone is one of many that falls under this category, which enables easy access to be purchased and used without any Part 107 certification and Remote ID registration. The versatility of drones and drone models is appealing for customers, but they pose many challenges to forensic tools and digital forensics investigators due to numerous hardware and software variations. In addition, different devices can be associated and used for controlling these drones (e.g., Android and iOS smartphones). Moreover, according to the Federal Aviation Administration (FAA), the adoption of Remote ID is not going to be required for people without the 107 certifications for this segment at least until 2023, which creates finding personally identifiable information a necessity in these types of investigations. In this research, we conducted a comprehensive investigation of DJI Mini 2 and its data stored across multiple devices (e.g., SD cards and mobile devices) that are associated with the drone. The aim of this paper is to (1) create several criminal-like scenarios, (2) acquire and analyze the created scenarios using leading forensics software (e.g., Cellebrite and Magnet Axiom) that are commonly used by law enforcement agencies, (3) and present findings associated with potential criminal activities.

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Nur Anisa, Medina, Rokhmatuloh und Revi Hernina. „UAV application to estimate oil palm trees health using Visible Atmospherically Resistant Index (VARI) (Case study of Cikabayan Research Farm, Bogor City)“. E3S Web of Conferences 211 (2020): 05001. http://dx.doi.org/10.1051/e3sconf/202021105001.

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This article describes the making of an oil palm tree health map using aerial photos extracted from UAV DJI Phantom 4. A DJI Phantom 4 was flown at 100 meters height at the Cikabayan Research Farm, Bogor City. Raw aerial photos from DJI Phantom 4 were processed using Agisoft Photoscan software to generate dense point clouds. These points were computed to produce a digital surface model (DSM) and orthophotos with a spatial resolution of 2.73 cm/pixel. Red, green, and blue bands of the photos were computed to provide the Visible Atmospherically Resistant Index (VARI). Also, orthophotos containing oil palm trees were digitized to create points in vector form. VARI pixel values were added to each point and classified into four classes: Needs Inspection, Declining Health, Moderately health, and Healthy. Resulted oil palm tree health map reveals that most of the oil palm trees in the study location are classified as Declining Health and Needs Inspection. Profitably, plantation workers can directly inspect oil palm trees whose health are declining, based on information derived from oil palm tree health map. The information that comes from this study will significantly save time and effort in monitoring oil palm trees’ healthiness.

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Dissertationen zum Thema "DJI"

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Eom, Dji-In Gina [Verfasser]. „Manipulating microglia in Alzheimer's disease / Dji-In Gina Eom“. Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2015. http://d-nb.info/1075757452/34.

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Larsson, Johan, und Marcus Stark. „Utvärdering av lägesosäkerheter i ortofoton framtagna med hjälp av DJI Phantom 4 RTK“. Thesis, Högskolan i Gävle, Samhällsbyggnad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29914.

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Flygfotografering med Unmanned Aircraft System (UAS) är i jämförelse med traditionell fotogrammetri effektivare, billigare och säkrare vilket har medfört att denna teknik föredras av många aktörer. Ett tidskrävande arbete som varit svårt att kringgå är att etablera flygsignaler på marken som används för att georeferera och kontrollera flygbilderna med. Under 2018 presenterade UAS-tillverkaren DJI sin nya quadcopter med integrerad Real-Time Kinematic (RTK)-modul. I samband med detta kan kontinuerliga och noggranna positioner levereras via Nätverks-RTK (NRTK) och behovet av markstödpunkter reduceras. I denna studie undersöktes lägesosäkerheterna i plan för ortofoton som framställdes med hjälp av en DJI Phantom 4 RTK där flygbilderna georefererades med begränsat antal eller utan markstödpunkter. Lägesosäkerheterna beräknades och kontrollerades enligt Handbok i mät- och kartfrågor (HMK) – Ortofoto, vilket är ett stöddokument inom ämnet. Vid framställning av ett ortofoto krävs även en digital terrängmodell (DTM) eller en digital ytmodell (Digital Surface Model, DSM) och kvaliteten av denna har stor inverkan på ortofotots kvalitet. I denna studie kontrollerades och utvärderades därför en del av den DSM som användes vid ortofotoframställning för respektive uppsättning enligt den tekniska specifikationen SIS-TS 21144:2016. Resultatet från studien visar att ett ortofoto går att framställas utan markstödpunkter och samtidigt klara kraven på specificerad lägesosäkerhet enligt HMK-standardnivå 3. Den sammanlagda lägesosäkerheten beräknades till 0,029 m vilket är 5 mm högre i jämförelse med ett ortofoto som baserats på traditionell georefereringsmetod, dvs. med markstödpunkter. Kravet på kvalitet i höjddata uppfylldes också för ortofotoframställning trots att en systematisk effekt i höjd uppkom. Denna effekt påverkade inte ortofotots koordinater i plan då standardosäkerheterna i höjd var låga. Resultatet visade att om två markstödpunkter adderades i vardera änden av området, kunde de systematiska effekterna i höjd minimeras och det var då möjligt att skapa en DSM som uppfyller kraven för detaljprojektering (noggrannhetsklass 1–3) enligt SIS-TS 21144:2016.
Aerial photography with UAS is in comparison with traditional photogrammetry more efficient, cheaper and safer which has led to this technology being preferred by many performers. A time-consuming job that has been difficult to avoid is to establish signals at the ground that are used for georeferencing and evaluate the results. In 2018, the UAS manufacturer DJI presented its new quadcopter with integrated Real-Time Kinematic (RTK) module. This allows continuous and accurate positions delivered via Network RTK (NRTK) and the need of ground control points can be reduced. In this study, investigations of the position uncertainties in orthophotos produced using a DJI Phantom 4 RTK carried out where the aerial images were georeferenced with limited numbers or without ground control points. The position uncertainties were calculated and controlled according to the Swedish HMK – Ortofoto (Orthophoto) which is a document within the subject. When producing an orthophoto, a digital terrain model (DTM) or a digital surface model (DSM) is also required and the quality of this has a great impact on the result. Therefore, a part of the DSM used for orthophoto production for each set was checked and evaluated according to the Swedish technical specification, SIS-TS 21144:2016. The result of the study shows that an orthophoto can be produced without ground control points and at the same time meet the requirements for specified position uncertainty according to HMK standard level 3. The total position uncertainty was calculated to be 0,029 m, which is 5 mm higher compared to the orthophoto based on the traditional georeferencing method, i.e. with ground control points. The requirement for quality in height data was also met for orthophoto production even though a systematic effect in height occurred. This effect did not affect the plane coordinates in the orthophoto because of the low standard uncertainties in height. The result showed that if two ground control points were added at each end of the area, the systematic effects were minimized, and it was possible to produce a DSM that fulfils the requirements for accuracy class 1-3 according to SIS-TS 21144:2016.

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Bååth, Maya, und Frida Jonsson. „Utvärdering av höjdosäkerhet i digital terrängmodell framtagen med fotografier infångade med DJI Phantom 4 RTK“. Thesis, Högskolan i Gävle, Samhällsbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32797.

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Att använda obemannade flygfarkoster, även kallat UAS (unmanned aerial systems), i karterings- och modelleringssyften har blivit en välanvänd metod de senaste åren. Mycket på grund av den tekniska utvecklingen som till stor del automatiserat processen med att framställa höjdmodeller och ortofoton. Inom ramen för denna studie kommer vi att titta närmare på hur olika faktorer påverkar höjdosäkerheten hos en höjdmodell framställd med data insamlat med en Real-Time Kinetic-UAS (RTK-UAS). Studien kommer dels att undersöka hur stor osäkerheten blir om endast den integrerade nätverks-RTK:n (NRTK) används vid georeferering av flygbilderna, dels att se hur stor påverkan adderade markstödpunkter har på osäkerheten. Studien kommer även undersöka hur stor påverkan flyghöjden har på osäkerheten genom att jämföra data från två flyghöjder: 100 m och 50 m. Det sista studien som undersöks är vilken inverkan snedbilder har på osäkerheten. Detta genom att jämföra en flygning där lodbilder tagits med en flygning där kameran har haft en vinkling på 60° från lod. Studien genomfördes med hjälp av Falun kommuns mättekniker som manövrerade UAS:en. För att kunna testa markstödpunkternas inverkan på osäkerheten mättes nio punkter in. Även kontrollprofiler mättes för att kunna kontrollera höjdmodellerna som producerades. Totalt genomfördes 3 olika flygningar: 100 m med lodbilder, 50 m med lodbilder samt 50 m med snedbilder. De insamlade fotografierna importerades till programvaran Agisoft Metashape där de georefererades med olika metoder. För att undersöka hur markstödpunkter påverkar osäkerheten genomfördes fem olika georefereringsmetoder av fotografierna tagna på 100 m flyghöjd med olika antal markstödpunkter i varje. RMS-värdet varierade från 0,060 m för NRTK + 1 GCP till 0,068 m för NRTK+2 GCP som fick den högsta osäkerheten.Undersökningen av flyghöjder visade att en lägre flyghöjd har en tydlig effekt på mätosäkerheten. En minskning av RMS-värdet sågs när 50 m flyghöjd användes jämfört med när 100 m flyghöjd användes. Användningen av snedbilder gav ingen tydlig effekt på mätosäkerheten. RMS-värdet blev 0,014 m då lodbilder användes och 0,017 m då snedbilder användes. Snedbildernas resultat försämrades något på grund av den adderade höjden från gräset, så på endast hårdgjorda ytor blir RMS-värdet från snedbildsflygningen noterbart lägre än RMS-värdet från lodbildsflygningen.
The technology of Unmanned Aerial Systems (UAS) has gained popularity as atool for mapping and modeling applications in recent years. This is mainly dueto the technological developments that have largely automated the process ofproducing digital elevation models (DEMs) and orthophotos. This study investigates the factors that effect the height uncertainty in anelevation model that is produced with data collected with a NRTK-UAS(Network Real-Time Kinematic UAS). We also evaluate two differentscenarios i.e. how the uncertainty is affected by using only NRTK-UAS andthe effect of adding ground control points (GCPs) to NRTK-UAS. It is alsoinvestigated how the flying height and using oblique images affect the DEMuncertainty. This will be assessed by comparing two flights i.e. by capturingnadiral and oblique images. The oblique images were captured at a 60° angle. The study was realised with help from the surveying engineer of Falunmunicipality, who maneuvered the UAS. The study area was around three anda half ha and consisted mainly of park. To be able to test differentgeoreferencing methods GCP:s were surveyed, as well as control profiles thatserved as a reference for investigating the uncertainty of the elevation model.There were totally 3 different flying methods tested: 100 m with nadiralorientation, 50 m with nadiral orientation and 50 m with oblige orientation. The acquired data was processed in the software Agisoft Metashape, where itwas georeferenced with different above-mentioned methods. To be able toexamine which impact GCP has on the uncertainty, five different sets withdifferent number of GCP were made with the photos captured from 100 mflying height. The RMS value varied from 0,060 m for NRTK+1 GCP whichhad the lowest RMS value to 0,068 m for NRTK+2 GCP which had the highest RMS value. We used the combination of NRTK-UAS and GCPs for testing the impact offlying height on the uncertainty. The flying heights 100 m and 50 m wascompared. A decrease of the uncertainty was observed when the flying heightwas 50 m instead of 100 m. Our results show that the RMS-value increased from 0,014 m to 0,017 musing nadiral and oblique images, respectively. The difference is too small tobe able to draw a conclusion. The results for the oblique images improvedwhen only hard surfaces such as asphalt, concrete etc. were observed.

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Johnsson, Fredrik. „Objekthöjders betydelse för bildövertäckning vid UAV-fotografering“. Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68607.

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Det finns ett fåtal studier som berör objekthöjders betydelse för bildövertäckning vid UAV-fotografering. Därför är det intressant att undersöka hur objekthöjder, bildövertäckningar, och flyghöjder påverkar varandra samt hur de gemensamt påverkar kvaliteten på data. Syfte är att undersöka hur bildövertäckningen, och flyghöjder påverkar kvaliteten på ortofoton och digitala ytmodeller. Samt undersöka hur objekthöjder påverkar bildövertäckningen. Kriteriet för studieområdet var att det skulle finnas ett högt objekt. Studien utfördes därför i Inre hamn i Karlstad som omfattar Löfbergsskrapan på ca 42 m. Studien avser UAVs som begränsas enligt Transportstyrelsens regler (TSFS 2017:110). Målet var att presentera referenstabeller till företag eller privatpersoner som samlar in mätdata med UAV. Data samlades in på flyghöjderna; 120 m och 90 m, med bildövertäckningarna; 60/60 %, 80/80 %, och 90/90 %. Höjddata för Löfbergsskrapan mättes in med Satlab GNSS. Resultatet visade att bildövertäckningen 60/60 % inte var användbart inom ett område med maximal objekthöjd 42 m. Det behövdes ≥80/80 % bildövertäckning för att få en bra markupplösning. I studien undersöktes även hur mycket bildövertäckningen kan förändras när objekt ligger under markytans plan. Resultatet visar att bildövertäckningen ökar när objektet eller ytan avviker tillräckligt mycket ifrån markytans plan och minskar om det går tillräckligt högt ovanför markytan. Slutsatsen föreslår att bildövertäckningen ska vara minst 80/80 % för flyghöjderna 120 m och 90 m. De inställningarna innebär att byggnader på ca 42 m höjd ska representeras med 2-3 cm markupplösning i ortofoton och digitala ytmodeller samt omfatta en resursvänlig metod. Slutsatsen menar att förändringen av bildövertäckningen varierar mellan 10-50 % när markytan ligger ca 42 m lägre än starthöjden för en UAV.
There are a few available studies purely focusing on the object heights significance on image overlap in UAV-photogrammetry. Therefore, it is interesting to examine how object heights, image overlaps, and altitudes affect each other and how they jointly affect data quality. The purpose is to examine how image overlap, and altitude affect the quality of orthophotos and digital elevation models. And also examine how object heights affect image overlap. The study area was selected with the criterion of including a high rise building. Therefore, the study area was Inre hamn in Karlstad City covering Löfbergsskrapan, a 42 m high coffee roasting house. The study refers to UAVs restricted according to rules set by Transportstyrelsen (TSFS 2017:110). The objective was to present useful reference tables for companies and individuals working with UAV-data. Data was collected on the altitudes; 120 m and 90 m with an image overlap of; 60/60 %, 80/80 %, and 90/90 %. Elevation values was collected with Satlab GNSS. Results showed that using an image overlap of 60/60 % for both altitudes was not viable in an area covering an object of 42 m high. The image overlap should be at least ≥80/80 % to cover objects of 42 m high. The objective was also to examine how image overlap differ when an object is below ground level. Results showed that image overlap increases when an object or surface differ 42 m from ground level and decreases if the object is above ground level. The conclusion suggests that in order to include objects of 42 m high in an area the image overlap should be at least 80/80 % for both altitudes (120 m and 90 m). With those settings the ground resolution in orthophotos and digital elevations models should be 2-3 cm. It was also estimated that the image overlap may alter from settings anywhere between 10-50 % when ground level is 42 m below the point of departure of the UAV.

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Padilla, De la Cruz Lino Walter. „Estudio de control de posición de un dron DJI Tello con los movimientos y gestos de la mano“. Bachelor's thesis, Pontificia Universidad Católica del Perú, 2020. http://hdl.handle.net/20.500.12404/18193.

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La evolución tecnológica de los robots ha ido creciendo constantemente durante los últimos años no solo en industrias de producción sino también en la vida social de las personas. Los denominados robots sociales o robots autónomos están ocupando más tareas en la vida diaria de las personas con el pasar de los años. Estos robots están siendo diseñados para servirnos y así tener un estilo de vida más sencillo. Por otro lado, los robots voladores (drones) han sido utilizados con más frecuencia en distintas áreas como la topografía, control fiscal, entre otros. Sin embargo, recientes aplicaciones se están orientando a un uso cotidiano de los drones. Este objetivo se logrará buscando formas de interacción más fluida con los robots, con el menor uso de dispositivos adicionales. Actualmente los drones son controlados usando un control remoto o joystick lo cual resulta adecuado cuando este se encuentra a una distancia superior a los dos metros. Sin embargo, cuando el dron se encuentra a una distancia menor a los dos metros de las personas se vuelve cada vez más redundante el uso de un joystick para controlar su posición. Diversos estudios demuestran que las personas se muestran más cómodas y seguras controlando al dron utilizando los movimientos y gestos de una mano cuando estos se encuentran cerca. El presente trabajo de investigación hace una revisión de la literatura basada en el procesamiento de imágenes para reconocimiento de objetos (una mano) y los distintos desarrollos o aplicaciones implementados en drones sociales. La combinación de estas investigaciones busca generar una nueva capacidad de interacción que permita controlar a los drones utilizando los movimientos y gestos de una mano.
Trabajo de investigación

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Hamáček, Vojtěch. „Vývoj bezpilotního prostředku pro autonomní mise“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442528.

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The aim of this thesis is to modify commercially produced drone DJI Matrice 100 and replace its original control unit by open source Pixhawk and its accessories. Subsequently, it deals with the selection of suitable open source firmware for Pixhawk and its configuration on the device. Another part is dedicated to the possibilities of using the Robotic Operating System (ROS) and its Mavros libraries on the onboard computer Raspberry Pi. By using Mavros, it examines the possibilities of drone flight control, both in the simulation environment and in the real environment.

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Macek, Jakub. „Létající robot pro práci v exteriéru“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241706.

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This thesis focuses on the design of the hexacopter construction for photographic purposes with maximum load of 4 kg. When constructing a hexacopter it is necessary to take into account a number of factors. For the actual construction the correct dimensioning of the supporting frame is important as well as the locomotor system. The main concept of this thesis includes three-axis gimbal for camera control. The verification of the structure strength was performed using FEM analysis. This work describes also the selection of individual components and their wiring. The end is dedicated to safety and different procedures for reducing operation risks.

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Russo, Francesco. „Tecniche di monitoraggio dei flussi veicolari: dai metodi tradizionali al telerilevamento satellitare“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Negli ultimi anni, l'aumento del traffico stradale sembra essere uno dei maggiori problemi nelle aree urbane e sub-urbane. Di conseguenza, attività legate al rilevamento dei flussi, alla individuazione di criticità legate a congestioni e/o ingorghi o all’osservazione del grado di riempimento dei parcheggi, diventano sempre più importanti. Le operazioni che consentono il monitoraggio dei flussi di traffico richiedono l’adozione di strumenti evoluti che la tecnologia mette a disposizione. Se, da un lato, le tecniche tradizionali di gestione e controllo del traffico sembrano rispondere adeguatamente in ambiti autostradali, capire l’evoluzione dei deflussi in ambito urbano può risultare complesso, a meno di non limitarsi all’analisi di tronchi stradali specifici senza effettuare un’analisi più ampia dell’intera area cittadina. L’acquisizione di immagini di una più ampia area, rappresentanti l'intera rete stradale, tramite sensori montati su velivoli, aerei e satelliti, potrebbe dunque garantire un servizio continuo ed esteso di monitoraggio. Si tratta tuttavia di tecniche e tecnologie ancora in fase di evoluzione, per quanto rapida. Le metodologie di analisi di immagini sono sempre più evolute e possono consentire il riconoscimento di oggetti e situazioni con ottime performance. Un caso analizzato nella tesi è stata la sperimentazione di metodi di classificazione object-oriented su una immagine satellitare ad alta risoluzione per l’individuazione dei veicoli in sosta. Obiettivo principale del lavoro è stata la valutazione di fattibilità dei diversi metodi per gestire e monitorare il traffico stradale su larga scala, e in continuo, tramite tecniche di telerilevamento, con la prospettiva di trasmettere in tempo reale informazioni sulla mobilità alle agenzie preposte al controllo e gestione del traffico ed alle utenze.

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Angelini, Virginia. „Studio e modellizzazione delle accelerazioni non gravitazionali di Cassini causate dai getti dei geyser di Encelado“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14262/.

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Encelado, satellite naturale di Saturno, presenta una intensa attività criovulcanica nella regione del polo sud: vengono eruttati da alcune fratture chiamate “tiger stripes” getti di vapore e grani di ghiaccio che raggiungono chilometri di altezza. Quando la sonda Cassini transita in questa zona durante un flyby, è sottoposta ad una resistenza aerodinamica che ne modifica la velocità. Questo elaborato si occupa dello studio delle variazioni di velocità (delta-V) a cui è sottoposta la sonda Cassini durante i flyby E9 ed E19. Per prima cosa è stata calcolata la densità del materiale eruttato con due diversi modelli e questo valore è stato utilizzato per calcolare la resistenza aerodinamica. E’ stata poi valutata l’incertezza dei modelli mediante un'analisi di sensitività dei parametri empirici utilizzati, necessaria per eseguire quindi l’analisi Monte Carlo. In seguito sono stati calcolati i delta-V e le probabilità di compatibilità con valori di riferimento disponibili in letteratura ottenuti tramite fit orbitale dei dati doppler dal team di L.Iess (2014). I risultati mostrano per E9 una buona compatibilità per entrambi i modelli utilizzati, mentre per E19 una scarsa compatibilità del primo modello e una buona per il secondo.

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Mugnaini, Irene. „Recupero dei metalli preziosi dai reflui di lavorazione dell'impianto UNOAERRE: modalità, problematiche e alternative“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Il trattamento di brillantatura chimica o “Bombing” è tipicamente utilizzato dalle industrie orafi, tra i prodotti di tale reazione sono presenti metalli preziosi, in particolare oro, argento, rame e zinco, e sostanze tossiche come il cianuro libero. L’azienda orafa UNOAERRE sfrutta il passaggio in due colonne caricate con resina anionica forte, MARATHON A della DOW, per adsorbire i metalli di interesse e procede alla combustione delle stesse per il recupero finale dopo che le resine hanno raggiunto il livello di saturazione. Una frequente sostituzione del riempimento porta ad alti costi in termini di resina acquistata, il costo della MARATHON A è di 6.83€/kg, ma tempi di recupero effettivo del metallo troppo lunghi portano ad avere elevate quantità di metallo prezioso, in particolare di oro, “stoccate” all’interno delle colonne di adsorbimento. Durante sperimentazione, al fine di trovare una soluzione a tale criticità, è stata valutata l’effettiva efficienza della resina in uso e quella di un’ipotetica resina alternativa, la PUROLITE A 400 TL. Il confronto tra le due ha rilevato prestazioni migliori con la MARATHON A; questa ha valori di efficienza di recupero dell’oro maggiori dell’80% fino a 5000L contro efficienze inferiori dell’80% già dopo 2500L con la resina alternativa. L’argento viene desorbito in entrambi i casi. Per ovviare al problema dei bassi tempi di sostituzione della resina, sono stati sperimentati due impianti elettrolitici: ELECTRUM prodotto da Siebec e IA-RECPRET di Italfimet. Dal secondo sono stati ottenute efficienze di abbattimento del 96.3% per l’oro, del 97.8% per l’argento e del 81.3% per il rame. E’ stato calcolato che l’istallazione dell’impianto elettrolitico Italfimet a monte del trattamento attraverso le colonne di adsorbimento con resine ioniche allungherebbe la vita di quest’ultime di circa 10 volte.

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Bücher zum Thema "DJI"

1

Hei-dji: Roman. Lomé, Togo: Editions Akpagnon/ACCT-BRAO, 1995.

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Hendri, Rifwan. Menanam karya menuai kesempurnaan: Kisah sukses 9 praktisi UKM pemenang Dji Sam Soe Award. Jakarta: Tim Info Tempo bekerja sama dengan PT. H.M. Sampoerna, Tbk., 2007.

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Guerrini, Mauro, und Giovanni Mari, Hrsg. Via verde e via d’oro. Florence: Firenze University Press, 2015. http://dx.doi.org/10.36253/978-88-6655-718-0.

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Via verde e via d’oro. Le politiche open access dell’Università di Firenze affronta il poliedrico tema dell’accesso libero e gratuito alla conoscenza. L’open access è un movimento nato nel secolo scorso con lo scopo di potenziare la diffusione dell’informazione scientifica. Negli ultimi dieci anni il movimento ha visto una crescita di interesse legata alle prese di posizioni dei più importanti istituti di ricerca mondiali e agli interventi legislativi di organi politici e accademici. Questa pubblicazione analizza la realtà dell’open access dai diversi punti di vista dei soggetti che la animano: autori, editori, mondo accademico, legislatori, fruitori del sapere, ecc. L’Università di Firenze, che è tra i maggiori protagonisti della promozione dell’accesso aperto in Italia, percorre da tempo la lunga marcia a favore dell’open access, attraverso la green road con FLORE, il suo repository istituzionale e la gold road con la Firenze University Press (FUP) che dai primi anni del 2000 realizza pubblicazioni ad accesso aperto.

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Rogari, Sandro, Hrsg. L'Università degli Studi di Firenze 1924-2004. Florence: Firenze University Press, 2005. http://dx.doi.org/10.36253/8884532892.

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Il volume raccoglie i testi degli interventi tenuti il 17 dicembre 2004 nell'Aula Magna dell'Università degli Studi di Firenze in occasione della presentazione dei due tomi del volume pubblicato dall'editore Olschki "L'Università degli Studi di Firenze 1924-2004". L'opera è stata discussa, dopo l'introduzione del Magnifico Rettore Augusto Marinelli, dagli storici Gian Paolo Brizzi e Paolo Prodi dell'Università di Bologna, Romano Paolo Coppini dell'Università di Pisa, e dai professori Francesco Gurrieri e Sandro Rogari. In appendice sono riportati una sintesi del significato della manifestazioni per gli ottant'anni, l'introduzione al volume del Rettore Augusto Marinelli e l'indice dei tomi.

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yin, Cui, und Huang ping. J. TEST shi yong ri ben yu jian ding kao shi quan zhen ti jing jie ji mo ni: A-Dji ting li shi ti. Bei jing: Bei jing yu yan ta xue chu ban she, 2009.

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6

Nigro, Giampiero, Hrsg. Il commercio al minuto. Domanda e offerta tra economia formale e informale. Secc. XIII-XVIII / Retail Trade. Supply and demand in the formal and informal economy from the 13th to the 18th century. Florence: Firenze University Press, 2015. http://dx.doi.org/10.36253/978-88-6655-751-7.

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La distribuzione dei beni di consumo nell’Europa medievale e moderna era multiforme e coinvolgeva spazi e attori diversi. Nelle fiere e nei mercati, nelle botteghe più o meno grandi delle città si vendeva ogni tipo di derrate alimentari e di oggetti necessari alla vita quotidiana. Erano anche innumerevoli i piccoli ambulanti che tenevano banco per strada, i contadini che raggiungevano la città per offrire i prodotti dei loro orti o del pollaio, della caccia o della raccolta spontanea, passando di casa in casa. Mercanti ambulanti percorrevano con le loro balle e casse anche le vie meno frequentate, raggiungendo villaggi e frazioni disperse. Una grande molteplicità di attori economici che concorrevano assieme a raggiungere ogni tipo di consumatore, dai più agiati ai più umili. L’obiettivo del progetto di ricerca è stato quello di comprendere l’organizzazione economica e l’evoluzione di queste diverse forme di commercio al minuto. Sul piano dei risultati, i contributi raccolti in questo volume costituiscono la risposta storiograficamente più aggiornata ad alcune delle questioni proposte, come l’analisi dei legami tra le diverse scale spaziali (dalla bottega alle reti europee di mercanti ambulanti), del commercio formale e informale tra regola e pratica, della circolazione dei beni fra città e campagna, delle tensioni fra gli attori di questi scambi, le loro rivalità e i loro accordi, ma anche le attese dei consumatori e le esigenze dello stato, e degli effetti sull’organizzazione istituzionale e dei mestieri della distribuzione nel periodo compreso fra il Medioevo e il XVIII secolo.

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Billio, Monica, Stefano Coronella, Chiara Mio und Ugo Sostero. Le discipline economiche e aziendali nei 150 anni di storia di Ca’ Foscari. Venice: Edizioni Ca' Foscari, 2018. http://dx.doi.org/10.30687/978-88-6969-255-0.

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Questo è il primo di una serie di quattro volumi pubblicati dai dipartimenti di Management, di Economia, di Studi Linguistici e Culturali Comparati e di Studi sull’Asia e sull’Africa Mediterranea dell’Università Ca’ Foscari per celebrare il 150° anniversario della fondazione della Scuola Superiore di Commercio in Venezia. Esso è dedicato al contributo apportato dalle discipline economiche e aziendali alle dinamiche storico-evolutive di Ca’ Foscari, con approfondimenti specifici sull’istituzione della Scuola Superiore, sugli studiosi che hanno insegnato nell’Ateneo e sull’evoluzione dei contenuti e delle modalità didattiche delle discipline economico-aziendali.

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Cipriani, Alberto, Alessio Gramolati und Giovanni Mari, Hrsg. Il lavoro 4.0. Florence: Firenze University Press, 2018. http://dx.doi.org/10.36253/978-88-6453-649-1.

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Le ricerche del presente volume si fondano sul nesso tra lavoro e Quarta Rivoluzione industriale. Su questo piano le domande sono numerose. Qual è la natura del lavoro 4.0? Qual è il rapporto tra rivoluzione tecnologica e occupazione? Quali sono i diritti del lavoro nell’epoca dei nuovi modelli di business? L’innovazione può essere implementata senza il superamento della subalternità novecentesca e l’approdo a nuove forme di libertà e responsabilità del lavoro? La digitalizzazione e le nuove forme di organizzazione dell’impresa mutano i rapporti di lavoro e favoriscono nuove forme di collaborazione e di conflitto? La formazione, la qualità e la libertà nel lavoro sono più importanti del salario? La progettazione e il design dell’impresa come si pongono nei confronti della tecnologia e del lavoro? La digitalizzazione spinge l’economia della conoscenza a determinare nuove forme di lavoro? Quali progetti da parte dei soggetti coinvolti, a cominciare dai lavoratori, perché queste trasformazioni siano un passo avanti nelle condizioni di lavoro e nelle relazioni industriali? Queste e molte altre domande sono alla base dei saggi raccolti nel volume cui hanno collaborato autori di diversa formazione ed esperienza: accademici, giornalisti, imprenditori, manager, operatori, sindacalisti e rappresentanti sindacali.

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Megale, Teresa, Hrsg. Contesti teatrali universitari. Florence: Firenze University Press, 2014. http://dx.doi.org/10.36253/978-88-6655-606-0.

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Il volume è il rendiconto dell’attività teatrale della Compagnia universitaria e in specie del progetto di residenza artistica Ri_Nascite che, finanziato dal Dipartimento della Gioventù_Presidenza del Consiglio dei Ministri e dall'Associazione Nazionale Comuni Italiani, realizzato in collaborazione con il Comune di Prato, ha esplorato nuove dinamiche e rinsaldato il rapporto tra l’istituzione universitaria e la città di Prato per il tramite della compagnia universitaria ‘Binario di Scambio’, che proprio agli ex-Macelli debuttò nel 2007. Il libro a più voci raccoglie contributi originali di autori, attori e registi e riflette sull’esperienza collettiva che ha portato ad Officina, spazio nodale per la creatività giovanile, un programma articolato in diverse attività, per ragionare sulla pluralità dei punti di vista, sulle aree di intervento e sugli obiettivi intorno ai quali si sviluppano le possibilità del linguaggio teatrale oggi. La residenza artistica della compagnia teatrale ‘Binario di Scambio’, estesa tra ottobre 2012 e marzo 2013, ha prodotto quattro nuove produzioni della giovane formazione universitaria, un cartellone di incontri, e tre laboratori di carattere più strettamente formativo, dai quali sono scaturite occasioni sicure di crescita e di consapevolezza collettiva. Premio nazionale 'Cultura di gestione' di Federculture

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Calvelli, Lorenzo, Giovannella Cresci Marrone und Alfredo Buonopane. Altera pars laboris. Venice: Edizioni Ca' Foscari, 2019. http://dx.doi.org/10.30687/978-88-6969-374-8.

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La ricerca nel campo dell'epigrafia si arricchisce continuamente con la scoperta di documenti inediti e vive oggi un radicale rinnovamento grazie alle tecnologie digitali. Una componente fondamentale del «mestiere di epigrafista» è però costituita anche dalla ricostruzione filologica e dall'indagine delle figure che si cimentarono nella collazione dei testimoni delle iscrizioni antiche. Il volume comprende sedici saggi di studiosi italiani e francesi, dedicati all'esame della tradizione manoscritta e a stampa dell'epigrafia, che Theodor Mommsen definì la «parte più difficile» della disciplina. Dai tesori ancora nascosti in numerose biblioteche d'Europa emerge un quadro di grande ricchezza documentaria, che presagisce un enorme potenziale di sviluppo per la ricerca futura.

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Buchteile zum Thema "DJI"

1

Schreiber-Kittl, Maria, und Haike Schröpfer. „Untersuchungsdesign und Methoden der DJI-Untersuchungen“. In Abgeschrieben?, 106–19. Wiesbaden: VS Verlag für Sozialwissenschaften, 2002. http://dx.doi.org/10.1007/978-3-322-89879-1_3.

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Bien, Walter, Donald Bender und Dagmar Krebs. „DJI-Familiensurvey: Der Zwang, mit unterschiedlichen Stichproben zu leben“. In Stichproben in der Umfragepraxis, 127–47. Wiesbaden: VS Verlag für Sozialwissenschaften, 1997. http://dx.doi.org/10.1007/978-3-322-86533-5_10.

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3

Husnjak, Siniša, Ivan Forenbacher, Dragan Peraković und Ivan Cvitić. „UAV Forensics: DJI Mavic Air Noninvasive Data Extraction and Analysis“. In 5th EAI International Conference on Management of Manufacturing Systems, 115–27. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67241-6_10.

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4

Funk, Heide, und Anita Heiliger. „Zur Bestandsaufnahme der Mädchenförderung in der Bundesrepublik — Bericht von einer Arbeitstagung am DJI“. In Neue Aspekte der Mädchenförderung, 9–18. Wiesbaden: VS Verlag für Sozialwissenschaften, 1990. http://dx.doi.org/10.1007/978-3-322-97879-0_1.

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5

Marbach, Jan H. „Personen mit und ohne Migrationshintergrund – Fragen der Integration im Licht des DJI-Familiensurveys“. In Familiale Beziehungen, Familienalltag und soziale Netzwerke, 279–332. Wiesbaden: VS Verlag für Sozialwissenschaften, 2008. http://dx.doi.org/10.1007/978-3-531-91980-5_9.

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Cheng, Lin. „Product Meaning-Making in High-Tech Companies: A Case Study of DJI Drones“. In HCI International 2021 - Posters, 329–36. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78635-9_43.

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7

Reißig, Birgit. „Ausdifferenzierung von Übergangswegen von der Schule in die Ausbildung. Ergebnisse aus Längsschnittstudien des DJI“. In Zwischen Reformeifer und Ernüchterung, 55–74. Wiesbaden: Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-01296-0_3.

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8

Chodrow, Brian, und Hon Peggy Fulton Hora. „DWI/DUI Interventions“. In Handbook of Evidence-Based Substance Abuse Treatment in Criminal Justice Settings, 103–22. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9470-7_7.

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9

Onnen-Isemann, Corinna. „Der Kinderwunsch als Kampf zwischen Realität und Idealen – Analysen und Überlegungen anhand der Daten des DJI-Familiensurvey“. In Familiale Beziehungen, Familienalltag und soziale Netzwerke, 119–45. Wiesbaden: VS Verlag für Sozialwissenschaften, 2008. http://dx.doi.org/10.1007/978-3-531-91980-5_4.

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Siddiqui, Faizan, Thomas Höllt und Anna Vilanova. „Uncertainty in the DTI Visualization Pipeline“. In Mathematics and Visualization, 125–48. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-56215-1_6.

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AbstractDiffusion-Weighted Magnetic Resonance Imaging (DWI) enables the in-vivo visualization of fibrous tissues such as white matter in the brain. Diffusion-Tensor Imaging (DTI) specifically models the DWI diffusion measurements as a second order-tensor. The processing pipeline to visualize this data, from image acquisition to the final rendering, is rather complex. It involves a considerable amount of measurements, parameters and model assumptions, all of which generate uncertainties in the final result which typically are not shown to the analyst in the visualization. In recent years, there has been a considerable amount of work on the visualization of uncertainty in DWI, and specifically DTI. In this chapter, we primarily focus on DTI given its simplicity and applicability, however, several aspects presented are valid for DWI as a whole. We explore the various sources of uncertainties involved, approaches for modeling those uncertainties, and, finally, we survey different strategies to visually represent them. We also look at several related methods of uncertainty visualization that have been applied outside DTI and discuss how these techniques can be adopted to the DTI domain. We conclude our discussion with an overview of potential research directions.

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Konferenzberichte zum Thema "DJI"

1

Saraeva, Ecaterina. „Dji. death sails“. In SIGGRAPH '15: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2745234.2745327.

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2

Voloshin, Dmitri. „Dji. death fails“. In SIGGRAPH Asia 2013 Computer Animation Festival. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2542398.2542449.

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Li, Zexiang. „For your eyes only? UAV and DJI“. In 2016 International Symposium on VLSI Technology, Systems and Application (VLSI-TSA). IEEE, 2016. http://dx.doi.org/10.1109/vlsi-tsa.2016.7480479.

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Li, Zexiang. „For your eyes only? UAV and DJI“. In 2016 International Symposium on VLSI Design, Automation and Test (VLSI-DAT). IEEE, 2016. http://dx.doi.org/10.1109/vlsi-dat.2016.7482592.

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5

Yousef, Maryam, Farkhund Iqbal und Mohammed Hussain. „Drone Forensics: A Detailed Analysis of Emerging DJI Models“. In 2020 11th International Conference on Information and Communication Systems (ICICS). IEEE, 2020. http://dx.doi.org/10.1109/icics49469.2020.239530.

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6

Hamdi, Dua'a Abu, Farkhund Iqbal, Saiqa Alam, Abdulla Kazim und Aine MacDermott. „Drone Forensics: A Case Study on DJI Phantom 4“. In 2019 IEEE/ACS 16th International Conference on Computer Systems and Applications (AICCSA). IEEE, 2019. http://dx.doi.org/10.1109/aiccsa47632.2019.9035302.

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Yousef, Maryam, und Farkhund Iqbal. „Drone Forensics: A Case Study on a DJI Mavic Air“. In 2019 IEEE/ACS 16th International Conference on Computer Systems and Applications (AICCSA). IEEE, 2019. http://dx.doi.org/10.1109/aiccsa47632.2019.9035365.

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8

Lan, James Kin Wah, und Frankie Kin Wah Lee. „Drone Forensics: A Case Study on DJI Mavic Air 2“. In 2021 23rd International Conference on Advanced Communication Technology (ICACT). IEEE, 2021. http://dx.doi.org/10.23919/icact51234.2021.9370578.

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9

Višnai, Kristián, und Branislav Kandera. „Anti-collision systems of unmanned aerial vehicles“. In Práce a štúdie. University of Žilina, 2021. http://dx.doi.org/10.26552/pas.z.2021.1.31.

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Annotation:

The main goal of the paper is to summarize the knowledge about anti-collision systems of unmanned aerial vehicles. In the work are also described currenly used anti-collision systems of unmanned aerial vehicles. The work contains practical research in which we tested anti-collision systems of DJI Mavic 2 Pro. The purpose of the research was to find out how this unmanned aerial vehicle can avoid static obstacles. The second part of practical research is the analysis and comparison of systems that provide anti-collision actvity between unmanned aerial vehicle and aircraft in the vicinity. Part of the work is also the evaluation and selection of a cooperative anti-collision system for DJI Inspire 2. The conclusion of the papercontains a summary of the findings that we have obtained based on the analysis of available facts and using operational experience.

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Schroder, Arne, Matthias Renker, Uwe Aulenbacher, Axel Murk, Urs Boniger, Roland Oechslin und Peter Wellig. „Numerical and experimental radar cross section analysis of the quadrocopter DJI Phantom 2“. In 2015 IEEE Radar Conference. IEEE, 2015. http://dx.doi.org/10.1109/radarconf.2015.7411928.

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Berichte der Organisationen zum Thema "DJI"

1

Filiz, Ibrahim, Jan René Judek, Marco Lorenz und Markus Spiwoks. Hüftsteife Aktienmarktanalysten. Sonderforschungsgruppe Institutionenanalyse, Februar 2021. http://dx.doi.org/10.46850/sofia.9783941627895.

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Wenn die Variabilität der Wirklichkeit systematisch unterschätzt wird, kann dies im Bereich der Aktienmarktprognose zu sehr kostenträchtigen Fehleinschätzungen beitragen. Die Zuverlässigkeit von Aktienmarktprognosen wird nur selten untersucht. Zwar liegt eine große Zahl von Studien zu Gewinnprognosen (pretax profit forecasts) vor (vgl. Ramnath, Rock & Shane, 2008), aber Untersuchungen der Prognosen von Aktienkursen, Aktienindizes oder Aktienrenditen sind nach wie vor rar. Deshalb wendet sich die vorliegende Studie der Betrachtung von Aktienindexprognosen zu. Es handelt sich um Prognosen des Deutschen Aktienindex (DAX), des Dow Jones Industrial Index (DJI) und des Euro Stoxx 50 (SX5E), die im Zeitraum von 1992 bis 2020 in den deutschen Tagesbeziehungsweise Wirtschaftszeitungen „Handelsblatt“ (HB) und „Frankfurter Allgemeine Zeitung“ (FAZ) veröffentlicht werden. Es handelt sich dabei um Prognosen mit Prognosehorizonten von sechs und zwölf Monaten, die regelmäßig von deutschen und internationalen Bankhäusern erstellt werden. In der vorliegenden Studie wird die Frage aufgeworfen, ob das Verhalten der betrachteten Aktienmarktanalysten der von Ogburn (1934) beschriebenen Charakteristik des Konservatismus entspricht und ob die Prognosen als tauglich oder als untauglich zu beurteilen sind.

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2

Pinkel, Robert. Ocean Dynamics: Vietnam DRI. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada572183.

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Pinkel, Robert. Ocean Dynamics: Vietnam DRI. Fort Belvoir, VA: Defense Technical Information Center, September 2013. http://dx.doi.org/10.21236/ada601137.

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Pinkel, Robert. Ocean Dynamics: IWISE DRI. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada590448.

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Pinkel, Robert. Ocean Dynamics: IWISE DRI. Fort Belvoir, VA: Defense Technical Information Center, September 2013. http://dx.doi.org/10.21236/ada598659.

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6

Pinkel, Robert, und Drew Lucas. Ocean Dynamics: Vietnam DRI. Fort Belvoir, VA: Defense Technical Information Center, September 2014. http://dx.doi.org/10.21236/ada618054.

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7

Alishahiha, M. DBI in the Sky. Office of Scientific and Technical Information (OSTI), April 2004. http://dx.doi.org/10.2172/826864.

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8

Garvock, James. DOI Test Feb 15, 2010. Washington, DC: The MAA Mathematical Sciences Digital Library, Februar 2010. http://dx.doi.org/10.4169/loci003289.

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9

NA, NA. NA: DOI HAS BEEN REMOVED. NA: NA, 2018. http://dx.doi.org/10.6028/nist.ir.7651.

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Agresta, Ronald. TR DOI Test 08/10/2020. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/1488093.

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