110 research outputs found

    Impacts of climate change on Lepidoptera species and communities

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    In this review, the impacts of climate change on Lepidoptera species and communities are summarized, regarding already registered changes in case of individual species and assemblies, and possible future effects. These include changes in abundance, distribution ranges (altitude above sea level, geographical distribution), phenology (earlier or later flying, number of generations per year). The paper also contains a short description of the observed impacts of single factors and conditions (temperature, atmospheric CO2 concentration, drought, predators and parasitoids, UV-B radiation) affecting the life of moths and butterflies, and recorded monitoring results of changes in the Lepidoptera communities of some observed areas. The review is closed with some theoretical considerations concerning the characteristics of “winner” species and also the features and conditions needed for a successful invasion, conquest of new territories

    Review on Construction Procedures of Driving Cycles

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    The goal of this paper is to give an overview of the literature of construction techniques of driving cycles. Our motivation for the overview is the future goal of constructing our own driving cycles for various types of vehicles and routes. This activity is part of a larger project focusing on determination of fuel and energy consumption by dynamic simulation of vehicles. Accordingly, the papers dealing with sample route determination, data collection and processing, driving cycle construction procedures, statistical evaluation of data are in our focus

    Development of Bus Driving Cycle for Debrecen on the Basis of Real-traffic Data

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    In the literature it has been proven several times, that the common driving cycles are not accurate enough to estimate the fuel and energy consumption data or emission data for vehicles, especially for public transport vehicles, such as buses. One can find driving cycles for buses, but the special driving environment in Debrecen, Hungary cannot be accurately represented by them. As a part of a project focusing on the determination of fuel and energy consumption of vehicles by dynamic simulation, a study has been carried out for determining driving cycles, which are representative for Debrecen. In this paper the development of a driving cycle for city buses in Debrecen is presented. Typical bus routes were selected in the town for the study, the vehicles were instrumented with an appropriate data collecting system. These onboard units were used to collect data such as travelled distance, speed and acceleration on several vehicles in the real-world traffic. We used special purpose software to pre-process and filter the collected data. After pre-processing a statistical evaluation of the data was carried out. Using a version of the widely spread micro-trip method of driving cycle development, a Bus Driving Cycle has been constructed for Debrecen

    Oribatid assemblies of tropical high mountains on some points of the “Gondwana-Bridge” – a case study

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    This work is the first part of a series of studies, which introduces the methodological possibilities of coenological and zoogeographical indication and – following the climate, vegetation and elevation zones – the pattern-describing analysis of the main Oribatid sinusia of the world explored till our days.This current work is a case-study, which displays the comparison of 9 examination sites from 3 different geographical locations. On each location, three vegetation types have been examined: a plain rain-forest, a mossforest and a mountainous paramo. Analyses are based on the hitherto non-published genus-level database and coenological tables of the deceased János Balogh professor. Occurrence of 18 genera is going to be published as new data for the given zoogeographical region

    Impact of climate change on the potential distribution of Mediterranean pines

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    The impact of climate change on the potential distribution of four Mediterranean pine species – Pinus brutia Ten., Pinus halepensis Mill., Pinus pinaster Aiton, and Pinus pinea L. – was studied by the Climate Envelope Model (CEM) to examine whether these species are suitable for the use as ornamental plants without frost protection in the Carpathian Basin. The model was supported by EUFORGEN digital area database (distribution maps), ESRI ArcGIS 10 software’s Spatial Analyst module (modeling environment), PAST (calibration of the model with statistical method), and REMO regional climate model (climatic data). The climate data were available in a 25 km resolution grid for the reference period (1961–1990) and two future periods (2011–2040, 2041–2070). The regional climate model was based on the IPCC SRES A1B scenario. While the potential distribution of P. brutia was not predicted to expand remarkably, an explicit shift of the distribution of the other three species was shown. Northwestern African distribution segments seem to become abandoned in the future. Current distribution of P. brutia may be highly endangered by the climate change. P. halepensis in the southern part and P. pinaster in the western part of the Carpathian Basin may find suitable climatic conditions in the period of 2041–2070

    Online convex combination of ranking models

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    Fully Distributed Robust Singular Value Decomposition

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    Articulated Funiculator is a new and innovative concept developed by TyrĂ©ns forachieving a more efficient vertical transportation with a higher space utilization.Having a variety of merits, i.e.: simple construction, direct electromagneticthrust propulsion, and high safety and reliability in contrast to rotary inductionmotor, linear induction motor (LIM) is considered to be one of the cases as thepropulsion system for Articulated Funiculator. The thesis is then carried outwith the purpose of determining the feasibility of this study case by designing theLIMs meeting some specific requirements. The detailed requirements include: aset of identical LIMs are required to jointly produce the thrust that is sufficientto vertically raise the moving system up to 2 m/s2; the size of the LIMs cannotexceed the specification of the funiculator; the maximum flux density in the airgap for each LIM is kept slightly below 0.6 T; no iron saturation of any part ofthe LIMs is allowed.In this thesis report, an introduction of LIM is firstly presented. Followingthe introduction, relevant literature has been reviewed for a strengthenedtheoretical fundamentals and a better understanding of LIM’s history and applications. A general classification of LIMs is subsequently introduced. In addtion,an analytical model of the single-sided linear induction motor (SLIM) has beenbuilt based on an approximate equivalent circuit, and the preliminary geometryof the SLIM is thereby obtained. In order to acquire a more comprehensiveunderstanding of the machine characteristics and a more precise SLIM design, atwo-dimensional finite element method (2D-FEM) analysis is performed initiallyaccording to the preliminary geometry. The results, unfortunately, turn out tobe iron severely saturated in the teeth and yoke, and a excessive maximumvalue of air-gap flux density. Specific to the problems, different parameters ofthe SLIM are marginally adjusted and a series of design scenarios are run inFlux2D for 8-pole and 6-pole SLIM. The comparisons between the results areconducted and the final solution is lastly chosen among them.Articulated Funiculator Ă€r ett nytt och innovativt koncept som utvecklats av TyrĂ©ns för att möjilggöra en mer effektiv vertikal transport och bĂ€ttre utnyttjautrymme. Tack vare fördelar sĂ„som en enkel konstruktion, direkt elektromagnetiskdragkraftsframdrivning, samt hög sĂ€kerhet och tillförlitlighet i motsatstill roterande induktionsmotor, Ă€r en linjĂ€r induktionsmotor (LIM) aktuell somframdrivningssystem. Detta examensarbete Ă€r utfört med syfte att utforma enLIM för att uppfylla vissa specifika krav. De detaljerade kraven inkluderar: enuppsĂ€ttning identiska LIM krĂ€vs för att gemensamt producera tillrĂ€cklig dragkraftför att vertikalt höja det rörliga systemet upp till 2 m/s2; storleken pĂ„LIM fĂ„r inte överstiga specifikation; den maximala flödestĂ€theten i luftgapet förvarje LIM hĂ„lls Ă€r begrĂ€nsad till knappt 0.6 T; ingen jĂ€rnmĂ€ttnad av nĂ„gon delav LIM Ă€r tillĂ„tet. I denna rapport ges först en introduktion av LIM-konceptet. Efter introduktionenhar relevant litteratur granskats för att stĂ€rka teoretiska grundkunskapersamt ge en bĂ€ttre belysning av historiken kring LIMs samt dess applikationer. Utöver detta har en analytisk modell av den ensidiga linjĂ€ra induktionsmotorn(SLIM) byggts, baserat pĂ„ en ungefĂ€rlig ekvivalent krets med vilket den preliminĂ€rageometrin för SLIM. För att erhĂ„lla en mer grundlĂ€ggande förstĂ„else avmaskinens egenskaper Ă€r en tvĂ„dimensionell analys med finita elementmetoden(2D-FEM) utförd, initialt med anvĂ€ndande av en preliminĂ€r geometri erhĂ„llenmed hjĂ€lp av analytisk dimensionering. Resultaten frĂ„n dessa simuleringar visadedock att jĂ€rnet mĂ€ttats kraftigt i bĂ„de tĂ€nderna och oket och ett överdrivetstort maximivĂ€rde av luftgapets flödestĂ€thet erhĂ„lls. Specifikt för applikationenjusteras olika parametrar och en rad driftscenarier körs i Flux2D för en 8-poligoch en 6-polig SLIM. En slutgiltig jĂ€mförelse mellan de olika maskindesignernapresenteras och den rekommenderade lösningen vĂ€ljs slutligen
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