Gotowe bibliografie tematyczne / UEV DISTRIBUTION

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Gotowa bibliografia na temat „UEV DISTRIBUTION”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "UEV DISTRIBUTION"

Sancho, Elena, Maya R. Vilá, Luis Sánchez-Pulido, Juan José Lozano, Rosanna Paciucci, Marga Nadal, Margaret Fox i in. "Role of UEV-1, an Inactive Variant of the E2 UbiquitinConjugating Enzymes, in In Vitro Differentiation and Cell Cycle Behavior of HT-29-M6 Intestinal Mucosecretory Cells". Molecular and Cellular Biology 18, nr 1 (1.01.1998): 576–89. http://dx.doi.org/10.1128/mcb.18.1.576.

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By means of differential RNA display, we have isolated a cDNA corresponding to transcripts that are down-regulated upon differentiation of the goblet cell-like HT-29-M6 human colon carcinoma cell line. These transcripts encode proteins originally identified as CROC-1 on the basis of their capacity to activate transcription of c-fos. We show that these proteins are similar in sequence, and in predicted secondary and tertiary structure, to the ubiquitin-conjugating enzymes, also known as E2. Despite the similarities, these proteins lack a critical cysteine residue essential for the catalytic activity of E2 enzymes and, in vitro, they do not conjugate or transfer ubiquitin to protein substrates. These proteins constitute a distinct subfamily within the E2 protein family and are highly conserved in phylogeny from yeasts to mammals. Therefore, we have designated them UEV (ubiquitin-conjugating E2 enzyme variant) proteins, defined as proteins similar in sequence and structure to the E2 ubiquitin-conjugating enzymes but lacking their enzymatic activity (HW/GDB-approved gene symbol, UBE2V). At least two human genes code for UEV proteins, and one of them, located on chromosome 20q13.2, is expressed as at least four isoforms, generated by alternative splicing. All human cell types analyzed expressed at least one of these isoforms. Constitutive expression of exogenous human UEV in HT-29-M6 cells inhibited their capacity to differentiate upon confluence and caused both the entry of a larger proportion of cells in the division cycle and an accumulation in G2-M. This was accompanied with a profound inhibition of the mitotic kinase, cdk1. These results suggest that UEV proteins are involved in the control of differentiation and could exert their effects by altering cell cycle distribution.

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Fayomi, Aisha, Amal S. Hassan i Ehab M. Almetwally. "Inference and quantile regression for the unit-exponentiated Lomax distribution". PLOS ONE 18, nr 7 (18.07.2023): e0288635. http://dx.doi.org/10.1371/journal.pone.0288635.

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In probability theory and statistics, it is customary to employ unit distributions to explain practical variables having values between zero and one. This study suggests a brand-new distribution for modelling data on the unit interval called the unit-exponentiated Lomax (UEL) distribution. The statistical aspects of the UEL distribution are shown. The parameters corresponding to the proposed distribution are estimated using widely recognized estimation techniques, such as Bayesian, maximum product of spacing, and maximum likelihood. The effectiveness of the various estimators is assessed through a simulated scenario. Using mock jurors and food spending data sets, the UEL regression model is demonstrated as an alternative to unit-Weibull regression, beta regression, and the original linear regression models. Using Covid-19 data, the novel model outperforms certain other unit distributions according to different comparison criteria.

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Tang, Zhanzhong, Zengxiang Zhang, Lijun Zuo, Xiao Wang, Xiaoli Zhao, Fang Liu, Shunguang Hu, Ling Yi i Jinyong Xu. "Spatial Evolution of Urban Expansion in the Beijing–Tianjin–Hebei Coordinated Development Region". Sustainability 13, nr 3 (2.02.2021): 1579. http://dx.doi.org/10.3390/su13031579.

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Against the background of coordinated development of the Beijing–Tianjin–Hebei region (BTH), it is of great significance to quantitatively reveal spatiotemporal dynamics of urban expansion for optimizing the layout of urban land across regions. However, the urban expansion characteristics, types and trends, and spatial coevolution (including urban land, GDP, and population) have not been well investigated in the existing research studies. This study presents a new spatial measure that describes the difference of the main trend direction. In addition, we also introduce a new method to classify an urban expansion type based on other scholars. The results show the following: (1) The annual urban expansion area (UEA) in Beijing and Tianjin has been ahead of that in Hebei; the annual urban expansion rate (UER) gradually shifted from the highest in megacities to the highest in counties; the high–high clusters of the UEA presented an evolution from a “seesaw” pattern to a “dumbbell” pattern, while that of the UER moved first from Beijing to Tianjin and eventually to Hebei. (2) Double high speed for both UEA and UER was the main extension type; most cities presented a U-shaped trend. (3) Qinhuangdao has the largest difference between the main trend direction of spatial distribution of urban land, GDP and population; the spatial distribution of GDP is closer to that of urban land than population. (4) The area and proportion of land occupied by urban expansion varied greatly across districts/counties. BTH experienced dramatic urban expansion and has a profound impact on land use. These research results can provide a data basis and empirical reference for territorial spatial planning.

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Feng, Lin Ping, Yu Qiang Wu, Shuang Pan i Xi Bin Wang. "FastSLAM Algorithm for Uninhabited Flying Vehicle". Applied Mechanics and Materials 347-350 (sierpień 2013): 3596–99. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.3596.

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For uninhabited flying vehicle, it is a key prerequisite of truly autonomous mobile vehicles to simultaneously localize and accurately map its surroundings. Kalman filter-based algorithms require time quadratic in the number of landmarks to incorporate each sensor observation. This paper presents an algorithm so called FastSLAM that recursively estimates the full posterior distribution over robot pose and landmark locations, but scales logarithmically with the number of landmarks in the map. FastSLAM factors the posterior into a product of conditional landmark distributions and a distribution over UAV paths. The algorithm has been tested in UAV environments. Experimental results demonstrate the advantages and disadvantages of the FastSLAM algorithm for UAV.

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Kaliszewski, Miron, Maksymilian Włodarski, Jarosław Młyńczak, Bartłomiej Jankiewicz, Lukas Auer, Bartosz Bartosewicz, Malwina Liszewska i in. "The Multi-Gas Sensor for Remote UAV and UGV Missions—Development and Tests". Sensors 21, nr 22 (16.11.2021): 7608. http://dx.doi.org/10.3390/s21227608.

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In this article, we present a versatile gas detector that can operate on an unmanned aerial vehicle (UAV) or unmanned ground vehicle (UGV). The device has six electrochemical modules, which can be selected to measure specific gases, according to the mission requirements. The gas intake is realized by a miniaturized vacuum pump, which provides immediate gas distribution to the sensors and improves a fast response. The measurement data are sent wirelessly to the operator’s computer, which continuously stores results and presents them in real time. The 2 m tubing allows measurements to be taken in places that are not directly accessible to the UGV or the UAV. While UAVs significantly enhanced the versatility of sensing applications, point gas detection is challenging due to the downwash effect and gas dilution produced by the rotors. In our work, we demonstrated the method of downwash effect reduction at aerial point gas measurements by applying a long-distance probe, which was kept between the UAV and the examined object. Moreover, we developed a safety connection protecting the UAV and sensor in case of accidental jamming of the tubing inside the examined cavity. The methods presented provide an effective gas metering strategy using UAVs.

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Rudge, Mitchel L. M., Shaun R. Levick, Renee E. Bartolo i Peter D. Erskine. "Modelling the Diameter Distribution of Savanna Trees with Drone-Based LiDAR". Remote Sensing 13, nr 7 (26.03.2021): 1266. http://dx.doi.org/10.3390/rs13071266.

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The diameter distribution of savanna tree populations is a valuable indicator of savanna health because changes in the number and size of trees can signal a shift from savanna to grassland or forest. Savanna diameter distributions have traditionally been monitored with forestry techniques, where stem diameter at breast height (DBH) is measured in the field within defined sub-hectare plots. However, because the spatial scale of these plots is often misaligned with the scale of variability in tree populations, there is a need for techniques that can scale-up diameter distribution surveys. Dense point clouds collected from uncrewed aerial vehicle laser scanners (UAV-LS), also known as drone-based LiDAR (Light Detection and Ranging), can be segmented into individual tree crowns then related to stem diameter with the application of allometric scaling equations. Here, we sought to test the potential of UAV-LS tree segmentation and allometric scaling to model the diameter distributions of savanna trees. We collected both UAV-LS and field-survey data from five one-hectare savanna woodland plots in northern Australia, which were divided into two calibration and three validation plots. Within the two calibration plots, allometric scaling equations were developed by linking field-surveyed DBH to the tree metrics of manually delineated tree crowns, where the best performing model had a bias of 1.8% and the relatively high RMSE of 39.2%. A segmentation algorithm was then applied to segment individual tree crowns from UAV-LS derived point clouds, and individual tree level segmentation accuracy was assessed against the manually delineated crowns. 47% of crowns were accurately segmented within the calibration plots and 68% within the validation plots. Using the site-specific allometry, DBH was modelled from crown metrics within all five plots, and these modelled results were compared to field-surveyed diameter distributions. In all plots, there were significant differences between field-surveyed and UAV-LS modelled diameter distributions, which became similar at two of the plots when smaller trees (<10 cm DBH) were excluded. Although the modelled diameter distributions followed the overall trend of field surveys, the non-significant result demonstrates a need for the adoption of remotely detectable proxies of tree size which could replace DBH, as well as more accurate tree detection and segmentation methods for savanna ecosystems.

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Wan, Dai, Miao Zhao, Hengyi Zhou, Fei Qi, Xin Chen i Guanxuan Liang. "Analysis of UAV patrol inspection technology suitable for distribution lines". Journal of Physics: Conference Series 2237, nr 1 (1.03.2022): 012009. http://dx.doi.org/10.1088/1742-6596/2237/1/012009.

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Abstract With the continuous improvement of UAV manufacturing level, it is more and more widely used in various fields. In recent years, unmanned aerial vehicle (UAV) inspection technology has been widely used in transmission lines above 110kV voltage level, and achieved good application results. However, because the operation of 10kV distribution line is much more complex than that of high-voltage transmission line, and the standardization of distribution equipment is low, the application effect of UAV inspection technology on distribution line is always unsatisfactory. Although some power enterprises have made continuous attempts, they have never formed an efficient and applicable UAV inspection technology system for distribution lines. In this paper, the operation characteristics of distribution lines and the existing working mode of manual inspection are deeply analyzed. At the same time, combined with the technologies of UAV carrying, attitude sensing and front-end identification, a practical implementation strategy of UAV patrol inspection of distribution line is proposed. It has guiding significance for expanding the application field of UAV and improving the efficiency of distribution line inspection.

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Cantieri, Alvaro, Matheus Ferraz, Guido Szekir, Marco Antônio Teixeira, José Lima, André Schneider Oliveira i Marco Aurélio Wehrmeister. "Cooperative UAV–UGV Autonomous Power Pylon Inspection: An Investigation of Cooperative Outdoor Vehicle Positioning Architecture". Sensors 20, nr 21 (9.11.2020): 6384. http://dx.doi.org/10.3390/s20216384.

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Realizing autonomous inspection, such as that of power distribution lines, through unmanned aerial vehicle (UAV) systems is a key research domain in robotics. In particular, the use of autonomous and semi-autonomous vehicles to execute the tasks of an inspection process can enhance the efficacy and safety of the operation; however, many technical problems, such as those pertaining to the precise positioning and path following of the vehicles, robust obstacle detection, and intelligent control, must be addressed. In this study, an innovative architecture involving an unmanned aircraft vehicle (UAV) and an unmanned ground vehicle (UGV) was examined for detailed inspections of power lines. In the proposed strategy, each vehicle provides its position information to the other, which ensures a safe inspection process. The results of real-world experiments indicate a satisfactory performance, thereby demonstrating the feasibility of the proposed approach.

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Moon, Inseok, Le The Dung i Taejoon Kim. "Optimal 3D Placement of UAV-BS for Maximum Coverage Subject to User Priorities and Distributions". Electronics 11, nr 7 (25.03.2022): 1036. http://dx.doi.org/10.3390/electronics11071036.

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The usage of unmanned aerial vehicle (UAV) as a base station is in the spotlight to overcome the severe attenuation characteristics of short-wavelength radio in high-speed wireless networks. In this paper, we propose an optimal UAV deployment algorithm, considering the priority of ground nodes (GNs) in different wireless communication environments. Specifically, the optimal position of a UAV is determined so that as many high-priority GNs can be served rather than covering as many GNs as possible. The proposed optimization problem deals with two groups of GNs with different priorities and finds the optimal position of the UAV by solving the mixed-integer second-order cone problem (MISOCP). To verify the effectiveness of the proposed optimal UAV deployment algorithm, we conduct various evaluating scenarios with different urban environments and GN spatial distributions. We also compare the performance of the proposed algorithm with the conventional one. Simulation results show that the proposed scheme achieves superior coverage efficiency, throughput, and delay performance compared to the conventional algorithm, even when the environment and the spatial distribution of GNs are changed.

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Forer, A. "In ultraviolet microbeam irradiations, characteristics of the monochromator and lamp affect the spectral composition of the ultraviolet light and probably the biological results". Journal of Cell Science 98, nr 3 (1.03.1991): 415–22. http://dx.doi.org/10.1242/jcs.98.3.415.

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Biological conclusions recently published concerning ultraviolet (u.v.) microbeam irradiation of spindles are different from those we previously published. Several technical differences between the two sets of experiments were investigated. The spectral distributions in the light emitted from mercury-arc, xenon-mercury-arc, and xenon-arc lamps were measured, as were the spectral distributions after the light from these lamps passed through a monochromator that was set to various wavelengths and various half-band-widths. Both the source of the u.v. light and the half-band-width of the monochromator influence the spectral distribution of the light leaving the monochromator: depending on the conditions, the light leaving the monochromator is not necessarily of the same wavelength as that to which the monochromator is set. Differences in these aspects of the experiments could easily give rise to the different biological conclusions reached in the two sets of experiments.

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Rozprawy doktorskie na temat "UEV DISTRIBUTION"

Åsberg, Philip, i Pontus Bohlins. "Tidig detektering av skogsbränder med hjälp av högupplöst data : Automatisk identifiering med hjälp av bildbehandling". Thesis, Högskolan i Gävle, Datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29786.

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Skogsbränder är svåra att upptäcka i ett tidigt stadie, vilket leder till förödande konsekvenser. Hela 30 % av koldioxiden som atmosfären tar emot kommer från skogsbränder. Flera tusentals människor och djur mister livet eller tvingas lämna sina hem. Det finns idag flera tekniker som med varierande framgång kan upptäcka skogsbränder. I detta arbete skall en alternativ metod för rökdetektering utvecklas och testas. Metoden ska vara möjlig att appliceras på UAV (Unmanned Aerial Vehicle) teknik. Arbetet fokuserar på att skilja på brandrök och dimma med högupplöst data. Två algoritmer prövas, SDA (Statistisk distributions algoritm) och KBA (Kunskapsbaserad igenkännings algoritm). Den första testar statistiska distributioner för att hitta unika identifierare för rök. Den andra algoritmen är baserad på kunskapen om rök vad gäller spektrala och morfologiska egenskaper. Röken identifieras med hjälp av form, area och kanter. Algoritmen visade en precision med 90 % i bilder innehållande rök och en feldetektering med 20 % för bilder innehållande dimma.
It is very difficult to discover forest fires in an early stage which can lead to devastat-ing consequences. Today, 30% of the total carbon dioxide that is released in the at-mosphere comes from forest fires. Thousands of human beings and animals are killed or forced to leave their homes every year. There are a variety of techniques today that is being used for discovering forest fires but whom lack in accuracy or has problems with a large amount of false alarms. This paper is an experimental study to try to solve this issue. The proposed method in this paper could be applied on UAV (Unmanned Arial Vehicles). This study will focus on identifying smoke regions from forest fires and removing fog objects which has similar characteristics as smoke. Two algorithms are tested, SDA (Statistical distributions algorithm) and KBA (Knowledge-based identification algorithm). The SDA uses statistic distribution al-gorithm where smoke and fogs characteristics are identified. The second algorithm, KBA, is a knowledge-based algorithm, where the shape, area and edges of the smoke’s characteristics are applied. The algorithm showed a 90 % accuracy for find-ing smoke in images with a false alarm rate of 20 % in images of fog.

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Garibaldi, Castillo Oscar Daniel. "Determination of the spatial distribution of atmospheric fluxes by using a UAV". Thesis, Purdue University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10152666.

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It is well known that the composition of the planet's atmosphere is changing at an unprecedented rate. Tremendous and well-documented amounts of man-made carbon are being released into the atmosphere, but is not clear where that extra carbon is going and how it interacts with the environment. The influence of human activities on the carbon cycle is of particular concern to scientists and policymakers. To clarify this important issue, in-situ measurements must be taken to improve our understanding of the mechanism that drives the exchange of CO2 within the atmosphere, which is dominated by turbulence. As such, there is great interest in the measurement of CO2 concentration and CO2 flux within the atmosphere.

A wide variety of platforms, in both mobile and fixed configurations, are being used to study closely the flux of CO2 within the atmosphere's boundary layer. Most of these platforms tend to be expensive and complex to operate. Recent developments of technologies such as microelectromechanical devices, GPS, and batteries have enabled the use of unmanned aerial vehicles as a viable method for performing atmospheric studies. Parallel to the studies of carbon exchange, field measurements of buoyancy flux are valuable. This variable helps to understand the mechanisms of turbulence production. It can be assessed with the use of a sonic anemometer, which has the ability of measuring wind speed fluctuations, alongside with virtual temperature. This has motivated the creation of an instrumented UAV the measurement of in situ variables such as CO2 flux, virtual temperature, wind speed, and turbulence.

An unmanned aerial system, nicknamed UAV Esperanza, was designed, constructed and tested with the purpose of measuring turbulent flux. The novelty of this system was the incorporation of an onboard sonic anemometer, an inexpensive inertial measurement unit/GPS navigation system, and a relatively low-cost gas analyzer. Field experiments demonstrated the capability of the system to resolve vertical profiles of average wind speed, virtual potential temperature, turbulent kinetic energy, CO2 concentration, and turbulent fluxes of buoyancy and CO2. The UAV system has the ability to obtain average CO2 flux values comparable to existing manned aircraft-based systems. Moreover, this is accomplished with a fraction of the operational costs of manned airplanes.

Error analysis of different scenarios demonstrated that the developed UAV system is appropriate for measuring plumes of power plants, daytime fluxes of crops, and forests. However, limitations of the onboard gas analyzer, range, and endurance of the aircraft render the system unsuitable for spectrum analysis

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Holden, Erin. "Spatial Ecology and Remote Sensing in the Precision Management of Tetranychus urticae (Acari: Tetranychidae)in Peanut". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/36225.

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The twospotted spider mite (TSSM), Tetranychus urticae Koch, is a common polyphagous pest in peanut agroecosystems. The mite has caused serious economic losses to peanut farmers in the Virginia-Carolina area, where approximately 20% of the peanuts are produced annually in the United States. Peanut farmers depend on pesticides to control mite populations. Because TSSM has developed resistance to many acaricides and there are restrictions on the use of pesticides, an alternative approach, such as precision pest management, is needed that would reduce the amount of pesticides that must be applied. This study was initiated to determine whether precision pest management is a feasible management strategy for use against TSSM populations in peanut. Two requirements of the precision management approach are that maps of the spatial distribution of TSSM populations can be developed and the pattern of distribution changes little over time to allow management strategies to be implemented.

To this end, a study of four commercial peanut fields located in two counties of southeastern Virginia was conducted to characterize the spatial distribution of TSSM populations. Intensive sampling of TSSM populations was conducted within each of the fields. The results showed that there was a general increase in TSSM populations during the early phases of sampling. Fields with low densities of TSSM populations had a spatial distribution that was either uniform or random; in fields with relatively higher densities, TSSM populations usually were aggregated. Little or no change in the spatial distribution of TSSM occurred from week to week in all fields that were sampled. Where changes in the distribution were observed, these were apparently caused by the application of a pesticide by the grower.

The study also looked at remote sensing technology as an alternative to intensive sampling within peanut fields. Research was conducted under laboratory conditions to determine whether damage caused by feeding TSSM could be detected spectrally before symptoms become visible. The study showed that after eight days leaves of peanut plants subjected to low soil moisture levels had significantly lower reflectance ratios (mean = 9.4766; a = 0.05) than plants given medium (mean = 10.0186) or high (mean = 10.5413) soil moisture levels. After 10 days, there were significant differences (P < 0.05) in the mean reflectance ratios of peanut leaves exposed to four levels of spider mite densities (0, 5, 10, 20 mites/leaf) and the three levels of soil moisture. However, no significant interaction was observed between soil moisture and spider mite density (P = 0.8710). The mean reflectance ratio for 20 TSSM per leaf was found to be significantly lower than 0, 5, and 10 TSSM per leaf at all levels of moisture (low, medium, and high). The results suggested that remote sensing could be used to detect and map plant damage caused by feeding of spider mites before visual symptoms of damage are observed.

The study also attempted to develop a platform for using remote sensing technology in the field. An Unmanned Air Vehicle (UAV) was evaluated that carried a remote sensing system. The UAV remote sensing system was flown over peanut fields where it captured images, which were analyzed to show the spatial distribution of plant stress. Further studies are needed to relate the distribution of plant stress or damage observed by the UAV with the distribution of TSSM densities within peanut fields. Once this has been accomplished, low-altitude remote sensing could be used as an alternative to sampling for building maps of the spatial distribution of TSSM populations for precision pest management.

Master of Science

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Li, Jie. "Évaluation et optimisation des performances des systèmes de production distribution". Metz, 2006. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2006/Li.Jie.SMZ0610.pdf.

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Nous considérons un système de production-distribution composé d’un ensemble d’unités de production et d’entrepôts disposées en série et connectés par des facilités de transport. Chaque entrepôt est contrôlé par une politique donnée de gestion de stock et il est approvisionnée par une unité de production amont de capacité finie. On considère un seul type de produit fini. Le problème à résoudre est de déterminer le meilleur paramétrage de la politique de gestion de stock sur l’ensemble du système tout en prenant en compte les contraintes sur la capacité de production, le taux de service client souhaité et les délais de transport. Nos travaux de recherche ont permit le développement d’une méthodologie d’optimisation des paramètres de gestion du stock basée sur la simulation, qui permet de trouver les paramètres de la politique de gestion du stock qui minimisent le coût sur l’ensemble du système de production-distribution. L’efficacité de l’approche proposée a été vérifiée par des expérimentes numériques
This thesis considers a production-distribution system made up of a set of production sites and distribution centers connected by the transport facilities. Each distribution center is managed by a given stock management policy. The aim is to find the best parameters setting of the stock management policy through the whole network in order to optimize the overall performances of the production-distribution system while taking into account the finite production capacity, the customer service requirement, the transport time, and the random customer demand. The results obtained during this PhD thesis allowed to develop a methodology of optimization for the parameter setting of inventory control policies management in the production-distribution systems. Thus, we proposed a simulation based optimization approach which computes the setting that minimizes the overall inventory cost of the production-distribution system, while taking into account fill rate constraints. The approach iss validated by a large number of numerical experiments

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Yang, Lifeng. "Computer relaying for EHV/UHV transmission lines". Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/40085.

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As the power systems grow, system connections become more complex. Due to cost and environmental concern, more and more parallel lines and series compensated lines may be installed in the system. In order to efficiently use the transmission network, more nonlinear flexible devices such as the phase shifter and the advanced compensation system will be put into use. Once a fault occurs on such a system, a delay in clearing the fault is usually not permissive. This requires a new generation of relays which have high security and dependability and high operating speed. With the advent of high speed microprocessor and fiber optic communication technologies, it is possible to develop high performance relays. In this dissertation, a new generation of pilot relays and non-pilot relays were developed for a transmission line. The pilot relays include the instantaneous percentage current differential (IPD), the phase comparison and the phasor based percentage current differential (PPD) principles. In the pilot protections the synchronized phasor measurement techniques are employed and digital CT saturation detectors are incorporated. All these schemes in primary protections feature charging current (or shunt current ) compensation. The phasor based principles are designed to work within one and a half cycles; while others based on sample by sample comparison are assumed to work in less than a cycle. The non-pilot relays to be investigated in this dissertation include the fault location based and phase angle based directional distance relays. One cycle data window is used in the phasor calculation. Both the distance relays are assumed to make a trip decision in about one and a half cycles. All algorithms were simulated against different fault conditions using EMTP outputs. The simulation results show all the pilot relay algorithms work well for EHV IUHV transmission lines including the series compensated lines. The fault location based distance relay works well in most cases, but it may give a wrong decision for the close-in fault with the fault resistance and may have a singularity problem. The phase angle based distance relay works very well for different fault conditions and is insensitive to fault resistance. The modified phase angle based distance relay was also developed for the series compensated line. It would not lose the direction for faults with or without fault resistance, either for a compensated system in forward direction, or in an adjacent line in reverse direction. The overreach is within 20% of the protected zone. This relay algorithm is also based on the one-cycle data window DFT, and it can give a reliable trip decision in about two cycles. All pilot relays with a fiber optic link and the phase angle based distance relay can constitute a new generation of protection systems for EHV IUHV transmission lines.
Ph. D.

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Koutti, Lahcen. "Étude de la densité électronique des phases paramagnétique et antiferromagnétique des monosulfures NiS, CoS et FeS de structure hexagonale dans l'approximation de la densité locale de spin". Metz, 1999. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1999/Koutti.Lahcen.SMZ9917.pdf.

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Nous avons étudié la densité de l'état fondamental des monosulfures FeS, Cos et NiS dans les phases antiferromagnétique et paramagnétique en utilisant les équations de Kohn-Sham. Ces équations sont représentées dans le formalisme des combinaisons linéaires d'orbitales atomiques (CLOA). Elles sont résolues de façon autocohérente dans le cadre de l'approximation de la densité locale de spin (LSDA), de l'approximation du gradient généralisé (GGA) et de la correction LSDA+ U ou U est l'interaction de Coulomb intra-site. Nous avons utilisé la structure hexagonale idéale de NiAs pour calculer la densité d'états électronique des monosulfures dans les deux phases magnétiques. L'organisation des états électronique doit expliquer la transition semi-conducteur-métal de FeS et NiS et le caractère métallique de CoS à toutes les températures. Dans l'approche LSDA nous avons précisé l'origine de la bande interdite de NiS en évaluant les influences respectives du champ cristallin, de l'énergie d'échange-corrélation et des paramètres du réseau. Nous avons montré que la diminution du paramètre c avait une action prédominante sur la suppression de la bande interdite. Pour FeS la comparaison entre la densité d'états calculée et les spectres de photoémission et de BIS permet l'identification des structures présentés dans les spectres expérimentaux. L'existence d'une bande interdite a pu être montré grâce à l'approximation LSDA + U. Le calcul de la densité d'états de CoS réalisé avec l'approximation LSDA montre que le composé est métallique en dessous et au dessus de la température de Néel. La simple LSDA est apte à décrire les propriétés électriques de FeS, CoS et NiS. Alors que la correction GGA n'apporte pas de modification significative aux résultats LSDA, l'approximation LSDA+U améliore la largeur de la bande interdite et la valeur du moment de spin pour FeS et NiS

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Tanonkou, Guy Aimé. "Une approche par relaxation lagrangienne pour l'optimisation d'un réseau de distribution : modèles stochastiques et fiables". Metz, 2007. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2007/Tanonkou.Guy_Aime.SMZ0708.pdf.

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Cette thèse présente les problèmes de conception d'un réseau de distribution stochastique. La première partie présente des modèles de conception du réseau de distribution soumis à des demandes aléatoires et des délais d'approvisionnement aléatoires des fournisseurs. Les modèles sont robustes et intègrent simultanément les décisions stratégiques (localisation des centres de distribution (DCs) et sélection des fournisseurs) et les décisions opérationnelles (gestion des stocks) dans un seul modèle d'optimisation. L'intégration de ces deux décisions entraîne une optimisation globale du réseau via un problème d'optimisation combinatoire NP difficile. Pour résoudre le problème, nous proposons une heuristique basée sur la technique de relaxation lagrangienne. Nous développons une méthode appelée ASGM (Armijo Subgradient Method) pour résoudre le problème dual résultant de la relaxation. Dans la deuxième partie de cette thèse, nous présentons deux problèmes de conception des réseaux de distribution stochastique avec des sites non fiables. Les décisions doivent être prises sous les conditions de disponibilité des sites (DCs et fournisseurs). L'objectif est de minimiser le coût total moyen du réseau de distribution tout en déterminant l'ensemble des stratégies optimales et robustes permettant la meilleure réaffectation des clients (resp. Les DCs) aux DCs (resp. Aux fournisseurs). Nous proposons une méthode d’optimisation Monte Carlo combinée avec une heuristique basée sur la relaxation lagrangienne. Dans cette thèse, les résultats numériques obtenus montrent des bornes lagrangiennes très serrées et des gaps de dualité qui ne dépassent pas 1% pour certaines instances du problème
This thesis deals with the development of models and heuristic algorithms for stochastic distribution network design problems. In the first part, the core decision problem lies in optimally designing a distribution network by finding the optimal distribution centers (DCs) location and the best supplier that would replenish the DCs. The first objective of this project is to join strategics decisions (location of DCs and supplier selection) and operational decision (inventory) in the same optimization model. The goal is to minimize the total fixed location cost, transportation cost, working-inventory cost. The problem is difficult to solve since it integrates all these decisions at the same time with non linear cost function to optimize. We provide an efficient technique which reduces system complexity. The second part of this thesis deals with the design of a distribution network where decisions must be made in the presence of uncertainty. Once the facilities have been constructed in the network, one or more of them may from time to time become unavailable because of some risks. To cope with this uncertain environment, we develop strategic decisions that take into account possible scenarios and strategies need to react when risk events occur. A two-period stochastic programming model is proposed. The goal is to minimize the total first stage cost plus the expected value of the random second stage cost taken trough all scenarios. As solution technique, we propose a Monte Carlo optimization approach combining the sample average approximation scheme and an efficient heuristic based on Lagrangian relaxation to generate efficient solutions and determine tight lower bounds

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Kamal, Mohamed. "Contribution à l'étude de la distribution des états électroniques de NiO dans l'état fondamental : utilisation de l'approximation LSDA+U". Metz, 1995. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1995/Kamal.Mohamed.SMZ9504.pdf.

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La distribution des états électroniques de NiO dans l'état fondamental a été étudiée dans le cadre de l'approximation de la fonctionnelle de la densité locale de spin. Tous les électrons y compris les électrons d localises sont décrits par des états itinérants en accord avec la symétrie de translation. Les fonctions d'onde et les énergies sont obtenues par une méthode autocohérente de combinaison linéaire d'orbitales atomiques a spin polarise. A la différence d'un calcul classique, les fluctuations de charge sont prises en compte et se traduisent par un potentiel agissant spécifiquement sur les électrons d. Le terme prépondérant dans ce potentiel est représenté par l'interaction électrostatique intrasite u entre deux électrons. La présence de u modifie la répartition des états électroniques permis et interdits ainsi que le degré d'hybridation des fonctions propres associées. Les résultats montrent des bandes d’occupées étroites et pratiquement toutes séparées. La bande interdite est de valeur comparable à la valeur expérimentale lorsqu'on ajuste l'énergie u a 5. 4 ev. Les fonctions d’occupées et vides sont celles prévues par le champ des ligands applique à un atome dans un environnement cubique. Les bandes 2p de l'oxygène sont en dessous des bandes d peu dispersives du métal et confèrent à NiO le caractère d'isolant de Mott. Cependant les bandes 3d remplies ne sont pas absolument pures car u contribue à accentuer la proportion de fonction 2p de l'oxygène dans ces bandes. C'est grâce à cette présence que notre diagramme théorique d'états électroniques permet l'interprétation de l'ensemble des résultats expérimentaux parmi lesquels l'absorption optique et la photoémission. Enfin l'accord satisfaisant avec les spectres de photoémission angulaire montre l'aptitude de notre démarche a décrire l'état fondamental de NiO
The electronic state distribution of the NiO antiferromagnetic ground state has been studied within the local spin density approximation. All electrons, including the localized 3D electrons, are described by means of itinerant states according to the translational symmetry. The wave functions and energies are obtained self-consistently through a spin polarized linear combination of atomic orbitals method. Unlike a classical calculation, the charge fluctuations have been taken into account and related to a potential acting specifically on the 3D electrons. The main term in that potential is the on-site electrostatic interaction U between two electrons. The presence of U alters the repartition of the allowed and forbidden electronic states as well as the degree of hybridyzation of the eigenfunctions. The results show that the occupied 3D bands are narrow and nearly separated. The calculated gap value is in agreement with the experimental value when U is adjusted to 5. 4 eV. The occupied and empty 3D functions are those predicted by the ligand field applied to an atom in a cubic surrounding. The oxygen 2p bands reside below the small dispersive metallic 3D bands and confer a Mott insulating character to NiO. Nevertheless the full bands are not entirely pure because U enhances the ratio of the oxygen 2p functions within these bands. The theoretical electronic state diagram allows the interpretation of the whole experimental results particulary the optical absorption and the photoemission. Finally the satisfactory agreement with the angular photoemission spectra shows the ability of our approch to describe the ground state of NiO

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Weyrauch, Shauna L. "Habitat fragmentation and woodland amphibians consequences for distribution, genetic diversity and fitness responses to UV-B radiation /". Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1092668394.

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Thesis (Ph. D.)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xiv, 138 p. : ill. Advisor: Thomas C. Grubb, Dept. of Evolution, Ecology, and Organismal Biology. Includes bibliographical references (p. 129-138).

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Benyahia, Mohamed. "Etude de la contamination du bivalve d'eau douce Dreissena polymorpha par le plomb : bioaccumulation, distribution tissulaire et élimination du métal : incidence de paramètres biotiques et abiotiques". Metz, 1991. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1991/Benyahia.Mohamed.SMZ9112.pdf.

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Les dreissènes exposées au plomb accumulent le métal à des niveaux différents selon la concentration métallique dans le milieu. Les cinétiques de bioaccumulation sont linéaires pour les faibles concentrations de Pb dans le milieu et saturantes pour les concentrations élevées. Les paramètres du milieu agissent sur la bioaccumulation. L'edta réduit fortement la bioaccumulation et la toxicité létale du plomb. Le zinc montre une interaction négative avec le plomb dans la phase initiale de la cinétique de bioaccumulation. La température diminue l'accumulation du plomb en stimulant les processus d'excrétion. Dans une exposition cyclique au plomb, la cinétique de bioaccumulation présente une allure sigmoïde ce qui semble montrer que la dreissène se comporte comme un système à compartiments d'accumulation. Il existe une variation saisonnière de la bioaccumulation. C'est au printemps que la vitesse d'accumulation ainsi que les contenus métalliques des organismes sont les plus importants. Le plomb a pu être localisé histochimiquement et par microanalyse essentiellement dans des granules au sein des cellules rénales, dans le cytoplasme des granulocytes dans les branchies, l'épithélium digestif, la glande péricardiale et dans le byssus. La décontamination est faible et se produit lentement par rapport à l'accumulation. Elle est significativement augmentée en presence d'edta et par une élévation de température. Le niveau de contamination initiale ne montre pas d'influence significative sur les taux de décontamination. La décontamination totale n'est pas atteinte
Freshwater mussels (Dreissena polymorpha) were exposed to lead under laboratory conditions. Patterns of accumulation in whole animals were linear at low concentrations and the tissues lead concentrations were proportional to lead in the medium. At high concentrations of lead in the medium, the accumulation proceeded at a high rate in a saturating mode. Under cyclic conditions of exposure, kinetic of lead accumulation showed a pronounced biphasic mode. It is argued that the biphasic course of accumulation seemed to indicate that the animal acts as a multi-compartments accumulation system. The chelation of lead by EDTA decreased strongly its toxicity and bioaccumulation. In the presence of zinc, uptake of lead in whole Dreissena was reduced in the initial phase of accumulation. Thereafter, the antagonistic effect of Zn decreased and became not significant at the end of exposure period. A rise in temperature decreased lead accumulation by mussels. The results also indicate that accumulation were greatly affected by seasonal conditions. In spring, the rate of uptake was the faster and lead body burden was the most important. By means of histochemical staining method and microanalytical technique (LAMMA), lead has been localized mainly in granules of renal cells and in cytoplasm of granulocytes in gills, pericardial gland, byssal gland and digestive epithelium. The depuration process were low and occured sloly compared to accumulation. The original lead concentrations in the soft parts did not influence significantly the rate of elimination. The presence of EDTA or a rise in tempeature enhanced the rate of lead elimination. In all conditions, the total depuration were not attained and the tissue lead concentrations remained at high levels in comparison to controls

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Książki na temat "UEV DISTRIBUTION"

International, Symposium on EHV/UHV AC HVDC Transmission Systems (1987 Bangalore India). International Symposium on EHV/UHV AC, HVDC Transmission Systems, 6-7 May 1987: Technical papers. New Delhi: Central Board of Irrigation and Power, 1987.

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United States. National Aeronautics and Space Administration., red. The frequency and distribution of high-velocity gas in the galaxy: Final report. [Washington, DC: National Aeronautics and Space Administration, 1995.

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Lyubarskiy, Yuriy, i Aleksandr Hrennikov. Intelligent electrical networks: computer support for dispatching solutions. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1134516.

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For" smart " electric networks, intelligent software tools that perform new functions and increase the level of computer support for dispatching solutions are considered. Given that one of the goals of building "smart" networks is to ensure recovery after accidents, the main focus of the textbook is on the problems of diagnosing emergency situations, intelligent monitoring of the state of electrical networks, and planning for the post-accident restoration of power supply. A new type of software simulator for dispatchers of electrical networks — a simulator for analyzing emergency situations-is considered in detail. The theoretical material is accompanied by many examples in the form of protocols for the operation of real intelligent systems. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of electric power specialties, managers and specialists of operational services of enterprises of power systems, electric and distribution networks and power stations, branches of PJSC ROSSETI, PJSC FGC UES, as well as students of advanced training courses.

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L' Euromarketing direct: Prospecter et vendre à 340 millions de consommateurs. Paris: Dunod, 1994.

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Jess, Olsen Ole, red. Competition in the electricity supply industry: Experience from Europe and the United States. Copenhagen: Jurist- og økonomforbundets forlag, 1995.

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Kruimer, Hannah. The non-discrimination obligation of energy network operators: European rules and regulatory practice. Cambridge, United Kingdom: Intersentia, 2014.

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North-South trade, employment, and inequality: Changing fortunes in a skill-driven world. Oxford [England]: Clarendon Press, 1994.

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Sebbane, Yasmina Bestaoui. Multi-UAV Planning and Task Allocation. Taylor & Francis Group, 2020.

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Sebbane, Yasmina Bestaoui. Multi-UAV Planning and Task Allocation. Taylor & Francis Group, 2020.

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Multi-UAV Planning and Task Allocation. Taylor & Francis Group, 2020.

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Części książek na temat "UEV DISTRIBUTION"

Gröbner, Julian. "Ultraviolet Radiation ultraviolet radiation (UV) : Distribution ultraviolet radiation (UV) distribution and Variability ultraviolet radiation (UV) variability". W Encyclopedia of Sustainability Science and Technology, 11149–58. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0851-3_453.

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Huntley, David, Drew Rotheram-Clarke, Roger MacLeod, Robert Cocking, Philip LeSueur, Bill Lakeland i Alec Wilson. "Scalable Platform for UAV Flight Operations, Data Capture, Cloud Processing and Image Rendering of Landslide Hazards and Surface Change Detection for Disaster-Risk Reduction". W Progress in Landslide Research and Technology, Volume 1 Issue 2, 2022, 49–61. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18471-0_4.

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AbstractThis International Programme on Landslide (IPL) Project 202 paper presents a scalable remote piloted aircraft system (RPAS) platform that streamlines unoccupied aerial vehicle (UAV) flight operations for data capture, cloud processing and image rendering to inventory and monitor slow-moving landslides along the national railway transportation corridor in southwestern British Columbia, Canada. Merging UAV photogrammetry, ground-based real-time kinematic global navigation satellite system (RTK-GNSS) measurements, and satellite synthetic aperture radar interferometry (InSAR) datasets best characterizes the distribution, morphology and activity of landslides over time. Our study shows that epochal UAV photogrammetry, benchmarked with periodic ground-based RTK-GNSS measurements and satellite InSAR platforms with repeat visit times of weeks (e.g., RADARSAT-2 and SENTINEL-1) to days (e.g. RADARSAT Constellation Mission) provides rapid landslide monitoring capability with cm-scale precision and accuracy.

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Wang, Guotai, i Xiangyu Bai. "Comparation of UAV Path Planning for Logistics Distribution". W Lecture Notes in Electrical Engineering, 223–38. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2259-6_20.

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Li, Jiangkun, Wei Zhang, Xuliang Wu, Xue Wu, Bin Wei, Leichao Wu, Yizhou Li i Peijian Wang. "Design and Application of γ-Ray Energy Spectrum Survey System Based on UAV". W Springer Proceedings in Physics, 581–88. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_50.

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AbstractAirborne γ-ray energy spectrum measurement is an effective method for radioactive mineral investigation and radiation environment monitoring. In recent years, with the gradual maturity of Unmanaged air vehicle (hereinafter referred to as UAV) technology, UAV airborne geophysical survey technology is becoming a hot research field. But the UAV has less load and space and is difficult to carry traditional aeronautical geophysical equipment. The miniaturization, intelligentization and automation of airborne geophysical survey instruments are the key technologies of airborne geophysical survey for UAVs. The γ-ray energy spectrum measurement system is designed suitable for UAV platform with load in the range of 30–180 kg, at the same time, the data acquisition control and remote monitoring software is developed. The calibration of the system is completed on the Shijiazhuang airborne standard model and Huangbizhuang dynamic belt, and the calibration parameters are obtained, the resolution of the crystal is better than 8.5%, and the peak drift is better than ±1, the sampling frequency of energy spectrum data is 1 Hz. Based on SY-120H and CH-3 UAV platforms, test flights were carried out in Karamay, Xinjiang and Erlianhot, Inner Mongolia, respectively, to find out the distribution of radioactive field in the test area and quickly delineate the specific location and range of the radioactive anomaly. The test results show that: UAV aviation γ The results of K, U and Th content measured by energy spectrum are basically consistent with those measured on the ground, which can provide a fast and efficient exploration technology and equipment for radioactive mineral investigation and radiation environment monitoring.

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Bilenko, Benny, i Noah Brosch. "Dust Properties And Distribution in the UV". W The Cosmic Dust Connection, 257–63. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5652-3_17.

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Bertola, Francesco. "The UV Energy Distribution of Elliptical Galaxies". W Spectral Evolution of Galaxies, 363–67. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4598-2_27.

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Dourmishev, A. L., L. I. Popova i L. A. Dourmishev. "Basal and Squamous Cell Carcinoma: Sex, Age and Location Distribution". W Skin Cancer and UV Radiation, 540–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60771-4_65.

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Morossi, C., M. Franchini i M. L. Malagnini. "UV Energy Distributions of Active Cool Stars". W Fundamental Stellar Properties: The Interaction Between Observation and Theory, 93–96. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5602-8_14.

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Zhang, C. Y. "Energy Distribution of Planetary Nebulae (UV to Radio)". W Planetary Nebulae, 99–108. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2088-3_37.

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Weigmann, H. J., J. Lademann, H. Meffert i W. Sterry. "Influence of Sunscreen on the Spectral Energy Distribution of Ultraviolet Radiation in Human Skin". W Skin Cancer and UV Radiation, 357–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60771-4_38.

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Streszczenia konferencji na temat "UEV DISTRIBUTION"

Harada, Masashi. "Calculation Method for Optimal Circulation Distribution on a Finite Span Flapping Wing". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3414.

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Yuanyuan, Li, Wang Kui, Yan Dawei, Liu Zhongyi, Lei Zheng, Zhou Jin, Xuan Wenbo, Ding Chengdi i Song Jia. "Efficiency Analysis of UHV Network". W 2018 China International Conference on Electricity Distribution (CICED). IEEE, 2018. http://dx.doi.org/10.1109/ciced.2018.8592036.

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Tian, Qing, i Taoxi Zhu. "Shunt capacitor bank protection in UHV pilot project". W 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7576264.

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Niu, Yiran, Zhenyang Zhang i Qianling Shui. "Vaccine Rational Distribution Program". W 2022 6th International Conference on Universal Village (UV). IEEE, 2022. http://dx.doi.org/10.1109/uv56588.2022.10185498.

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Xuan, Li, Wu Shipu, Wang Ping i Wang Xiaoqi. "UHV capacitance voltage transformer suitable for series compensation platform". W 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7576103.

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Wenjun, Sun, Liu Wenjun, Liu Leibin i Cui Lifeng. "The Biological Safety of UV Disinfection Systems for Drinking Water". W Water Distribution Systems Analysis 2008. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41024(340)93.

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Wang, Guan, Haoran Zhao i Qingshui Hao. "Research on Fault Location for UHV Half-wavelength Transmission Lines". W 2018 China International Conference on Electricity Distribution (CICED). IEEE, 2018. http://dx.doi.org/10.1109/ciced.2018.8592240.

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Xin, Jianchi, Xiaofang Wang, Lusheng Zhou, Zhong Ye i Haitao Liu. "Numerical Investigation of the Flow Field and Aerodynamic Load on Impellers in Centrifugal Compressor With Different Radial Inlets". W ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57180.

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Based on Computational fluid dynamics (CFD) simulation, this study investigates the interior flow in a radial inlet, and helps to figure out the flow phenomenon in radial inlet and the aerodynamic load on the downstream impellers. Three different radial inlets, i.e., original model without guide vanes (OGV), with evenly distributed guide vanes (EGV) and with unevenly distributed of guide vanes (UGV) are considered. The results indicate that the performance of the compressor with UGV outperforms the others, which increases the polytropic efficiency of the centrifugal compressor by 2.3% and provides better flow parameter distribution. The inlet distortion created by the radial inlet affects the aerodynamic load distribution on the downstream impeller. Running unsteady simulations, the aerodynamic load on the impeller’s leading edge is obtained for the three radial inlets. The dominant frequency and pulse amplitude obtained by Fast Fourier transforms (FFT), reveal that the main frequencies of the aerodynamic load present different distributions under three radial inlets. The UGV model provides the minimal amplitude value at machine rotating frequency when compared with the other two models, and the harmonics of the impeller passing frequency appear obviously, which is similar to that under the axial flow inlet condition.

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Zhang, Rui, Guangya Wu i Tian Yuan. "Analysis on natural contamination characteristics of UHV AC post porcelain insulator". W 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7575985.

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Ma, Xiaowei, Ming Zhang, Jiaxiong Gao, Qingping Wang, Zhiqian Bo, Yingke Zhao, Yi Zhu i Hao Zheng. "Adaptability analysis of differential protection for UHV half-wavelength AC transmission line". W 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7575949.

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Raporty organizacyjne na temat "UEV DISTRIBUTION"

Branduardi-Raymont, Graziella, i et al. SMILE Definition Study Report. ESA SCI, grudzień 2018. http://dx.doi.org/10.5270/esa.smile.definition_study_report-2018-12.

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The SMILE definition study report describes a novel self-standing mission dedicated to observing solar wind-magnetosphere coupling via simultaneous in situ solar wind/magnetosheath plasma and magnetic field measurements, X-Ray images of the magnetosheath and magnetic cusps, and UV images of global auroral distributions defining system-level consequences. The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) will complement all solar, solar wind and in situ magnetospheric observations, including both space- and ground-based observatories, to enable the first-ever observations of the full chain of events that drive the Sun-Earth connection.

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Asenath-Smith, Emily, Emma Ambrogi, Lee Moores, Stephen Newman i Jonathon Brame. Leveraging chemical actinometry and optical radiometry to reduce uncertainty in photochemical research. Engineer Research and Development Center (U.S.), wrzesień 2021. http://dx.doi.org/10.21079/11681/42080.

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Subtle aspects of illumination sources and their characterization methods can introduce significant uncertainty into the data gathered from light-activated experiments, limiting their reproducibility and technology transition. Degradation kinetics of methyl orange (MO) and carbamazepine (CM) under illumination with TiO₂ were used as a case study for investigating the role of incident photon flux on photocatalytic degradation rates. Valerophenone and ferrioxalate actinometry were paired with optical radiometry in three different illumination systems: xenon arc (XE), tungsten halogen (W-H), and UV fluorescent (UV-F). Degradation rate constants for MO and CM varied similarly among the three light systems as k W-H < kiv-F < kXE, implying the same relative photon flux emission by each light. However, the apparent relative photon flux emitted by the different lights varied depending on the light characterization method. This discrepancy is shown to be caused by the spectral distribution present in light emission profiles, as well as absorption behavior of chemical actinometers and optical sensors. Data and calculations for the determination of photon flux from chemical and calibrated optical light characterization is presented, allowing us to interpret photo-degradation rate constants as a function of incident photon flux. This approach enabled the derivation of a calibrated ‘rate-flux’ metric for evaluating and translating data from photocatalysis studies.

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She, Ruifeng, i Yanfeng Ouyang. Analysis of Drone-based Last-mile Delivery Systems under Aerial Congestion: A Continuum Approximation Approach. Illinois Center for Transportation, sierpień 2023. http://dx.doi.org/10.36501/0197-9191/23-014.

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This paper presents a systematic analysis and design framework for a spectrum of last-mile delivery systems that leverage unmanned aerial vehicles (UAVs). Four distinct modes are considered: (1) direct drone deliveries from a fixed depot; (2) drone deliveries from parked trucks that carry bulk parcels to customer neighborhoods; (3) drone deliveries from nonstopping trucks that tour customer neighborhoods; and (4) as a benchmark, traditional truck-based home deliveries. We present a new continuum-approximation approach that is used for analysis of both truck routing and aerial-UAV traffic. We compared the operational cost and efficiency of different delivery schemes to reveal how a certain scheme is the most efficient under various scenarios. We demonstrate the applicability of our model on expansive real-world roadway networks and further conduct analysis on grid networks, yielding key analytical insights. The drone-based delivery is demonstrated to be superior to conventional truck-only delivery, suggesting a significant potential for socioeconomic benefit. It is observed that when servicing a relatively low demand over a small area, dispatching drones directly from the distribution facility is the most efficient method. As the demand grows or spans a wider area, collaborative strategies are preferred, as they better cope with certain aspects, such as the long line-haul cost or the ramping aerial congestion, by striking a balance between efficiency and flexibility.

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Huntley, D., D. Rotheram-Clarke, R. Cocking, J. Joseph i P. Bobrowsky. Current research on slow-moving landslides in the Thompson River valley, British Columbia (IMOU 5170 annual report). Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331175.

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Interdepartmental Memorandum of Understanding (IMOU) 5170 between Natural Resources Canada (NRCAN), the Geological Survey of Canada (GSC) and Transport Canada Innovation Centre (TC-IC) aims to gain new insight into slow-moving landslides, and the influence of climate change, through testing conventional and emerging monitoring technologies. IMOU 5107 focuses on strategically important sections of the national railway network in the Thompson River valley, British Columbia (BC), and the Assiniboine River valley along the borders of Manitoba (MN) and Saskatchewan (SK). Results of this research are applicable elsewhere in Canada (e.g., the urban-rural-industrial landscapes of the Okanagan Valley, BC), and around the world where slow-moving landslides and climate change are adversely affecting critical socio-economic infrastructure. Open File 8931 outlines landslide mapping and changedetection monitoring protocols based on the successes of IMOU 5170 and ICL-IPL Project 202 in BC. In this region, ice sheets, glaciers, permafrost, rivers and oceans, high relief, and biogeoclimatic characteristics contribute to produce distinctive rapid and slow-moving landslide assemblages that have the potential to impact railway infrastructure and operations. Bedrock and drift-covered slopes along the transportation corridors are prone to mass wasting when favourable conditions exist. In high-relief mountainous areas, rapidly moving landslides include rock and debris avalanches, rock and debris falls, debris flows and torrents, and lahars. In areas with moderate to low relief, rapid to slow mass movements include rockslides and slumps, debris or earth slides and slumps, and earth flows. Slow-moving landslides include rock glaciers, rock and soil creep, solifluction, and lateral spreads in bedrock and surficial deposits. Research efforts lead to a better understanding of how geological conditions, extreme weather events and climate change influence landslide activity along the national railway corridor. Combining field-based landslide investigation with multi-year geospatial and in-situ time-series monitoring leads to a more resilient railway national transportation network able to meet Canada's future socioeconomic needs, while ensuring protection of the environment and resource-based communities from landslides related to extreme weather events and climate change. InSAR only measures displacement in the east-west orientation, whereas UAV and RTK-GNSS change-detection surveys capture full displacement vectors. RTK-GNSS do not provide spatial coverage, whereas InSAR and UAV surveys do. In addition, InSAR and UAV photogrammetry cannot map underwater, whereas boat-mounted bathymetric surveys reveal information on channel morphology and riverbed composition. Remote sensing datasets, consolidated in a geographic information system, capture the spatial relationships between landslide distribution and specific terrain features, at-risk infrastructure, and the environmental conditions expected to correlate with landslide incidence and magnitude. Reliable real-time monitoring solutions for critical railway infrastructure (e.g., ballast, tracks, retaining walls, tunnels, and bridges) able to withstand the harsh environmental conditions of Canada are highlighted. The provision of fundamental geoscience and baseline geospatial monitoring allows stakeholders to develop robust risk tolerance, remediation, and mitigation strategies to maintain the resilience and accessibility of critical transportation infrastructure, while also protecting the natural environment, community stakeholders, and Canadian economy. We propose a best-practice solution involving three levels of investigation to describe the form and function of the wide range of rapid and slow-moving landslides occurring across Canada that is also applicable elsewhere. Research activities for 2022 to 2025 are presented by way of conclusion.

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