1,720,954 research outputs found
The Support Frame of Fuel Consumption Measurement Device AVL 7351 CME
No full textKütusekulu mõõteseadme AVL 7351 CME tugiraami projekteerimine ja ehitamine oli praktiline ja rakendusliku väärtusega töö.
Käesoleva töö käigus on teostatud järgnevad teoreetilised ja praktilised tööd:
1. Tutvutud kütusekulu mõõteseadmega AVL 7351 CME, selle töötamise põhimõtte ja lisasüsteemidega, sest need määravad tugiraami projekteerimise ning ehituse tingimused ja nõuded.
2. Selgitatud kütusekulu mõõtmise vajadust ja erinevaid meetodeid.
3. Antud ülevaade mõõtesüsteemide patentidest ja tootjafirmadest.
4. Selgitatud tingimused tugiraami projekteerimiseks.
5. Esitatud vajalikud tugevusarvutused tugiraami vastupidavuse määratlemiseks.
6. Tehtud materjali valik tugiraami ehituseks.
7. Projekteeritud tugiraam vastavalt seadme mõõtudele, ettenähtud nõuetele ja lisaseadmete paigutamise vajadustele.
8. Töö tähtsaimaks osaks oli mobiilse kütusekulu mõõteseadme tugiraami praktiline projekteerimine ja ehitamine, arvestades esitatud nõudeid.
9. Paigaldatud mõõteseade kindlalt tugiraamile.
10. Viimaseks praktiliseks etapiks oli ühenduskaablite ja kütusevoolikute paigutus tugiraami talade sisse.
11. Koostatud juhend kütusekulu mõõteseadme paigutamiseks tugiraamile.
12. Lisaks on kirjeldatud käesoleva tugiraami ehituskäiku ning kütusekulu mõõteseadme tööasendit ja paigutust tugiraamil.
Tänu võimalusele kasutada tugiraamil lisaseadmeid ning tugiraami mobiilsusele, on võimalik kütusekulu mõõteseadet AVL 7351 CME igati otstarbekalt kasutada Eesti Maaülikooli mootorite laboris, töötades eelnevalt välja kasutamise metoodika ning teha erinevaid laboratoorseid testimisi.The aim of the work is to design and build a support frame for fuel consumption measurement device AVL 7351 CME according to given requirements.
The function of the thesis is to give an overview of the operation of measuring fuel consumption and the additional systems designed to identify the structural features of the support frame. The paper provides an overview of frame design and construction.
The result of this work was to be designed in accordance with the requirements for the supporting frame drawings, instructions for placing the device in its position on the frame, and a built support frame
Two-row potato planter to tractors of low-traction
Get PDFMagistritööna on tegemist projektiga, mille käigus on projekteeritud kaherealine
kartulipanur väikese veojõuklassiga traktoritele, mis on mõeldud väiketalunikele ja
eelkõige just omatarbeks kartulit kasvatavatele aiapidajatele. Selline projekteeritud
kodumaine kartulipanur võimaldab korraga kahe vao kartulite mahapanekut mulda, vagude
lahti- ja kinni ajamist ning samaaegselt ka väetise doseerimist kartulitele.
Käesoleva lõputöö raames on teostatud järgnevad teoreetilised ja projektilised tööd:
1. Tutvutud kartulikasvatuse agrotehnikaga, sealhulgas just üldiste kasvutingimustega,
kartuli mahapaneku eelsete ja järgsete tegevustega ning hooldusega.
2. Valituks osutus kartulipanur kahe horisontaal lintkonveieri mugulannustiga, mille
käitamine on traktori käitusvõllilt ning mille haakimisviisiks traktoriga on risttalaga
haakeseade. Antud kartulipanur toetub kahe tugirattaga maapinnale, millel on
olemas nii vagude lahti- ja kinniajamise funktsioonid kui ka kompleksväetamise
dosaator.
3. Antud ülevaade sarnaste mugulannusti variantidega kartulipanurite patentidest ning
võrreldud arendatavat seadet teiste Eesti turul saada olevate konkureerivate
kaherealiste kartulipanuritega.
4. Tutvutud masinaohutuse ja -kasutuse seadustega ning masina projekteerimisele
esitatavate ohutusnõuetega. Toodud välja neist antud projektiga põhilisemad
haakuvad punktid – peab olema ohutu kasutajale ja ümbritsevale keskkonnale.
5. Tehtud vajaminevad tugevusarvutused kartulipanuri raami materjali valikuks ja
vastupidavuse määratlemiseks.
6. Kartulipanuri veojõu takistuseks on 8373,7 N ja traktori liikumistakistuse kogu
jõud on 7300,3 N ning seetõttu on sobilikumaks käiguks kartulipanuriga töötamisel
traktori esimene käik.
7. Kaherealise kartulipanuri liikumiskiiruseks on 5...8 km/h. Kartulipunkri mahtuvus
on 1200 kg.
8. Teostatud ’’masin-käsitsi’’ katse tulemustes selgus, et konstrueeritud
kartulipanuriga kartuli mahapanek on tõhusam, kui ’’masin-käsitsi’’ kartuli
mahapanekul. ’’Masin-käsitsi’’ läheks ühele hektarile kartuli mahapanekuks aega
~6,5 tundi ja kartulipanuriga ~5 tundi.
Töö arvutustulemuste teostamisel on kasutatud arvutipõhist programmi Mathcad.
Kartulipanuri projekteerimisel ja modelleerimisel kasutati CAD-i põhist
joonestusprogrammi Solid Edge.
Magistritöö käigus projekteeritud kartulipanuri uudsuseks tuleb pidada kartulipanuri
mugulannusti, väetisannusti ning lintkonveieri koostoimelist kasutust, mis annab
võimaluse istutada kartulimugulad vagudesse ning samaaegselt anda ka doseeritud
väetisekogused vakku.
Töö edasiarendamise põhilisteks suundadeks oleks projekteeritud mõõtude järgi
kartulipanuri prototüübi valmis ehitamine ja sellega reaalsete põldkatsete teostamine,
võrdlemaks seda teiste maailmas toodetavate sama tootlikkusega kartulipanuritega.The aim of the project is to design a novel two-row potato planter for low-traction tractors
equipped with a synergistic tuber meter, fertilizer meter, and a belt conveyor, which is
capable of planting two-rows of potatoes evenly, effectively and simultaneously, fertilizing
the potatoes at the same time.
As a result of product development, the design solution of the tuber meter was found out.
The paper gives an overview of the selected solution and the predetermined design criteria
for the two-row potato planter. In order to describe the movement of the machine, a
kinematic scheme with calculations has been prepared. Traction and driving resistance
calculations for determining the strength and durability of the frame were carried out.
The result of the project is a novel two-row potato planter with a tuber metering actuator
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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