Test VIII - cumulative test by Piigli, Mets, Parker, Kauler "Top delusion" question / answers are red. Test I The induction machines are associated with the names of Dolivo - Dobrovolsky, Tesla. The synchronous machines are associated with the name of Ferraris. The DC machines are associated with the names of Jacobi and Henry. The electromagnetic torque is born in air gap. The torque is proportional to the current in dc motor. Which equations are correct? P = sW; oomega = tuletis fii'st The angular frequency is 2*pi()*n / 60 ja 2*pi()f The motor torque is equal to TL + J * oomega tuletis aja järgi The inductor supplies the motor with flux. The leading companies in the world market of electrical drive engineering are: Mitsubishi. The energy balance is described by energy conservation law. The armature supplies the motor with current. The cheapest and the most reliable is induction motor.
Electrical drives and power electronics TESTS · The synchronous machines are associated with the names of Ferraris · Name the scientists who first studied electrical phenomena Coulomb · The DC machines are associated with the names of Jacobi Henry · The leading companies in the world market of electrical drive engineering are Mitsubishi · · The electromagnetic torque is born in air gap · What kind of drives the majority of drive systems present low accuracy · The induction machines are associated with the names of Dolivo-Dobrovolsky Tesla · One of the first eletrical motors has been built by Jacobi · Electromagnetic efficiency is measured in tesla · Time constants are measured by ms s hours · Who is the author of the first electrical motor Henry · Which rectifier cannot be built without a transformer 3-phase midpoint
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 1 on General Course of Electrical Drive SENSORLESS DRIVE POWER FLEX (ALLEN BRADLEY) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram 2. Tables of observations Task Operation/Record Observation 1 Reverse the motor speed. How long Time to reverse was 16 does the motor reverse
Proportional Control 108 PID Control 110 Motor Control 123 Measuring and Analyzing Control Loops 130 6 Solenoids, Relays, and Other Analog Outputs 137 Solenoids 137 Heaters 143 Coolers 148 Fans 149 LEDs 151 7 Motors 161 Stepper Motors 161 DC Motors 180 Brushless DC Motors 184 Tradeoffs between Motors 198 Motor Torque 201 vi Contents 8 EMI 203 Ground Loops 203 ESD 208 9 High-Precision Applications 213 Input Offset Voltage 215 Input Resistance 216 Frequency Characteristics 217 Temperature Effects in Resistors 218 Voltage References 219 Temperature Effects in General 221 Noise and Grounding 222
Ticket No1 1)The characteristic is called output characteristic or volt-ampere charateristic of a Rectifier Diode. 2)Rectifier Diode. 3) A is called Anode and C is called Cathode. An Anode has positive potential and therefore collects electrons in the device. Cathode has negative potential and therefore emits electrons to anode. The symbol looks like an arrow that ponts from the anode to the cathode, and reminds that conventional current flows easily from the p side(anode) to the n side(cathode). BIASING. Forward biasing. If the current in a diode is too large, excessive heat will destroy the device. Even approaching the burnout current value without reaching it can shorten its life. Therefore manufacturer's data sheet specifies the maximum forward current, that diode can withstand. This average current IF is the rate a diode can handle up to the forward direction when used as a rectifier
Electrical Drive SERVO DRIVE (FESTO) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Component list: PC with Wmmemoc software SEC-AC-305 controller MTR-AC-55 servo motor with encoder External 24VDC power supply unit Test stand with slide and limit switches 4. Tables of observations Task Operation/Record Observation 1 Measure the slide position at Limit Slide moved to the right, switch 1 Limit 1 reached at 1,46 2 Turn potentiometer slowly counter- Slide started slowly clockwise moving left, movement
Question 1 (in wiki and in terminologies) 1. SNR is a calculated value that represents the ratio of root- mean-square (rms ) signal to rms noise. 2. SINAD stands for Signal-to-noise and distortion ratio. It is a measure of the quality of a signal from a communications device, often defined as: where is the average power of the signal, noise and distortion components. SINAD is usually expressed in dB. For examples to calculate the ratio of 1 kW (one kilowatt, or 1000 watts) to 1 W in decibels, use the formula 3. ENOB is the effective number-of-bits related to SINAD and the quality of a digitized signal. The 6.02 term in the divisor converts decibels (a log10) to bits (a log2) The 1
of the product. 1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc. OMRON, 1997 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis- sion of OMRON. No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility for errors or omissions
the advancement in spacecraft related research. The purpose of this essay is to explain what a railgun is and how it works along with a little history and the recent advancements in railgun related science. 3 1. What a railgun basically is A railgun is an electrically powered electromagnetic projectile launcher and a large electric circuit, made up of three parts: a power source, a pair of parallel rails and a moving armature. Along the pair of parallel conducting rails a sliding armature is accelerated by the electromagnetic effects of a current that flows down one rail, into the armature and then back along the other rail. Railguns have long existed as experimental technology but the mass, size and cost of the required power supplies have prevented railguns from becoming practical military weapons.
electric car, how much costs electric cars. The problems for electric cars, there are many problems why peoples still can´t use quiet and more green cars. But even the electric car is not all green because the electricity produced for nuclear, coal, oil shale and natural gas. These ways to get electricity pollutes nature, the only difference between lies in the fact that pollution is in the one place. Coal Electric power station Oil shale power station in Narva What is a electric car An electric car is a plug-in battery powered automobile which is propelled by electric motor. Electric cars are a variety of electric vehicle (EV); the term "electric vehicle" refers to any vehicle that uses electric motors for propulsion, while "electric car" generally refers to road-going automobiles powered by electricity. While an electric car's power source is not explicitly an on-board battery, electric cars with motors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 to 41 21 to 30 Roadwheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 to 100 52 to 74 Capacities Engine oil (drain and refill) OHV engine: With filter change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.25 litres (5.7 pints) Without filter change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.75 litres (4.8 pints) CVH engine: Carburettor engines with filter change: Pre-July 1982 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.75 litres (6.6 pints) July 1982 onwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.50 litres (6
value of the worst spurious signal. 6. Channels - related to the inputs of the ADC can either be multiplexed or individually selected. 7. Linearity - relates to how a ADC follows a linear function. All ADCs are to a certain extend nonlinearity. 8. Operating temperature - measurement, which in optimal state for ADC-s, lets them function correctly. 9. Power dissipation - refers to the amount power dissipated when the ADC is operating. Question 2 An 8 bit ADC has a reference voltage of 5V. What is the digital output code word for an input of 1.2V? What is the voltage range corresponding to 1 LSB? 1,2𝑉 0,0195𝑉 = 61 ; 61 = 001111012 Digital output code for an input of 1.2V is 001111012. Voltage range corresponding to 1 LSB is U= 0,0195V. Question 3 A 15 bit ADC has a reference voltage of 10V. What is the digital output code word for an input of 6.83V
do Outside diameter of the tube m 9 1 Introduction Heat transfer is a very common phenomenon in chemical engineering. Heat exchangers are one of the most common technological devices used in different areas of chemical industries. There are a large number of options available for the exchange of thermal power. The choice usually comes down to different factors, in which the heat exchanger must be performing. One of the most common heat exchangers structure is the tubular form. In the field of tubular heat exchangers, one way is to bend the tube helicoidally, which makes the tube a lot more compact and less expensive, because less material is needed to jacket the tube. Due to the increased number of turns of the helix, additional turbulence is generated inside the tube and
receiveing · bit, character, frame synchronization · set data rate, data format · error control: receive command frames from Primary, transmit response frames to Primary. 3. The Sub-Network Access Protocol (SNAP) field: 5 bytes generate/evaluate check digits for error detection Combined Station has the combined functionalities/ responsibilities of both LLC Service types compared to HDLC service modes > Bit synchronization Independent transmit & receive clocks. receiver explicitly resynchronizes on 1st primary and secondary station. What's new in the frame, compared to HDLC:
8.0 2,050-2,500 4,975 4,313 2,261 1,961 8.5 2,500-3,000 . . . . 9.0 3,000-4,000 5,480 4,751 2,491 2,160 10.0 4,000-5,000 . . 32 . . 11.0 5,000+ . . . . Fishbuster Trawl Doors Features The first truly "universal" otterboard. Extremely effective both on bottom and midwater fishing conditions. Fine lines to maximize spread and reduce drag. Rugged construction and stress-relieved welds designed to withstand rough bottoms, midwater strains, and onboard handling. V-form design for stability. Lift-to-drag ratio in excess of 2 to 1 over low-aspect ratio otterboards. 33 Half-weight shoes available for midwater and semipelagic fishing. 34 Connecting and Angle of Attack
the boundaries between the individual zones. In 1940, D. Philpot suggested to use columns with a density gradient of buffer solutions, and in the 50s years the method has been refined and was developed the device for electrophoresis in density gradient. However, the method was deficient, because after switching off the electric current, formed during electrophoresis zones have "blurred". Subsequent achievements in electrophoresis associated with the stabilization establishment of zones in the solid support medium. So, in 1950, as a solid carrier scientists began to use a filter paper, in 1955 it was proposed to use
Digital versus Analog computers Electronic Computers Constructed from transistors that use electricity to function. Mechanical Computers Do not use electricity to function. Constructed of a combination of gears, levers and springs. General-purpose Computers Were not manufactured to do any one thing. Changeable to do any task. Special-purpose Computers Manufactured to do a predetermined task or set of tasks. Digital Computers One that functions in discretely varying quantities. Produces or gives results that are also discretely varying. Analog Computers One that functions in continuously varying quantities. Produces or gives results that are also continuously varying.
............................................................................................27 SOLAR ENERGY..............................................................................................................27 8.1 Photovoltaic energy...................................................................................................... 28 8.2 Solar thermal heat.......................................................................................................29 8.3 Solar thermal power plants......................................................................................... 30 8.4 Solar energy and the environment..............................................................................30 WIND ENERGY.................................................................................................................31 9.1 The History of Wind ..................................................................................................31 9
geothermal heat--which are renewable (naturally replenished). In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% (15% of global electricity generation),followed by solar hot water/heating, which contributed 1.3%. Modern technologies, such as geothermal energy, wind power, solar power, and ocean energy together provided some 0.8% of final energy consumption. While there are many large-scale renewable energy projects and production, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development.Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20100 watt) solar power systems sold per year.
INTRODUCTION OF SUPPLY CHAIN MANAGEMENT (SCM) A supply chain is a network of facilities and distribution options that performs the functions of procurement of materials, transformation of these materials into intermediate and finished products, and the distribution of these finished products to customers. Supply chains exist in both service and manufacturing organizations, although the complexity of the chain may vary greatly from industry to industry and firm to firm. Supply chain management is typically viewed to lie between fully vertically integrated firms, where the entire material flow is owned by a single firm and those where each channel member operates independently. Therefore coordination between the various players in the chain is key in its effective management
everything. It is assumed that there will be a significant rise of connected devices throughout the world, allowing the growth of new services, transforming the way people work and live. The lack of human interaction will probably cause the emergence of new business models and promote the delivery of services across diverse socio-economic sectors. A research by Machina Research predicts that the Internet of Things is likely to boost the economy by an enormous amount up to US$ 4.5 trillion yearly. The needs of variable industries are already met by the use of Machine to Machine (M2M) solutions using wireless networks. Being a relatively new sector, the M2M connections are expected to grow up to 55% a year in Europe, North America, Oceania and Asia between 2010 and 2013. Approximately two-thirds of mobile operators in Europe provide M2M
r w F1 genotypes (all) C C F1 phenotypes (all) pink; F2 genotypes and phenotypes 1 mark: r w r w gametes C , C C , C ; r r r w r w w w F2 genotypes C C C C C C C C F2 phenotypes red pink (pink) white; F2 ratio 1:2:1; accept other symbols if key given. accept r and w as symbols without key. 6 (c) (i) 65; 130; 65; 3 (ii) 0.138 + 0.007 + 0.061; (or other suitable working) 0.206 – 0.208; 2 marks for correct value if no working shown ecf for both marks but calculated value must be to three decimal places 2
separating them (open - only one pin is covered or the jumper is removed). Connector header - a series of two or more metal pins on the motherboard or other PCB; used to attach a cable to indicator lights, switches, and/or other devices in the computer Jumper header - two pins or a series of two-pin groups where jumpers are used. BIOS - Pronounced "bye-ose," an acronym for basic input/output system. The BIOS is built- in software that determines what a computer can do without accessing programs from a disk. On PCs, the BIOS contains all the code required to control the keyboard, display screen, disk drives, serial communications, and a number of miscellaneous functions. The BIOS is typically placed in a ROM chip that comes with the computer (it is often called a ROM BIOS). This ensures that the BIOS will always be available and will not be damaged by disk failures. It also makes it possible for a computer to boot itself. Because RAM is faster
.........................................99 Appendix 6. Belarus. Chart of withholding tax rates. ...........................................................103 References .........................................................................................................................104 ABOUT TRADERUN PROGRAMME ..................................................................................106 3 INTRODUCTION The current reading material focuses on business peculiarities in Ukraine and Belarus. *** The aim of the Traderun programme course "FUNDING PROJECTS IN RUSSIA AND EASTERN PARTNERSHIP COUNTRIES" is to provide the students with comprehensive and practical overview of the fundraising possibilities in EU and Estonia. The course gives an overview of EU structural support and regional implementing agencies, that are available for a businessman to apply for a fund.
1 Wave energy Introduction to wave energy There are several possibilities to harvest different forms of energy from the sea. One of these options is the usage of waves for the generation of electricity. The devices needed to perform this task are called wave energy converters. Wave energy is indirect solar energy in twice. At first there is the wind, which is caused by variations in atmospheric pressure due to a differential solar heating of earth's surface by the sun. Different regions of pressure drives a force which rises a movement of atmospheric air masses that causes the earths wind system. If wind strikes over the surface of an open water, waves are induced. First they are very flat with only a low level of energy
3. Weight loss. I. Title. II. Title: Four-hour body. RA775.F47 2010 613.7--dc22 2010018533 eISBN: 978-0-307-46365-4 All illustrations by Fred Haynes/Hadel Studio, unless otherwise noted in the Photo and Illustration Credits section Jacket front-flap photos: (top) (c) Mark Reifkind; (bottom) (c) Photos taken by Inge Cook, provided courtesy of Ellington Darden, PhD v3.1 For my parents, who taught a little hellion that marching to a different drummer was a good thing. I love you both and owe you everything. Mom, sorry about all the crazy experiments. Support good science-- 10% of all author royalties are donated to cure-driven research, including the excellent work of St. Jude Children's Research Hospital. LIST OF ILLUSTRATIONS GROUND ZERO--GETTING STARTED AND SWARAJ Comparison of Methods for Estimating % Bodyfat Male Examples--Bodyfat Female Examples--Bodyfat Ramit Sethi's Betting Chart Weight Glide Path SUBTRACTING FAT
Commercial Games Java is nowhere near as popular a gaming language as C or C++, but it is being used, and in games which have become bestseller. Commercial Java games are mostly CD-based applications, and use dirty Java (often Java and C++). Tom Clancy's Politika (1997) from Red Storm Entertainment (http://www.redstorm.com/) was written in almost pure Java. Tom Clancy's Rainbow Six (1999) started out by mixing C++ and Java, but they dropped the Java when the code grew too complex [Upton 2000]. Both Shadow Watch (2000) and Tom Clancy's ruthless.com (1998) were written in Java mixed with C/C++. Roboforge (2001) by Liquid Edge Games (http://www.roboforge.com) was coded in Java and Java 3D; it was given an "Excellent 87%" by PC Gamer Magazine in December 2001. IL-2 Sturmovik (2001) by Maddox Games (http://www.il2sturmovik.com/) used dirty Java, with part of the game engine written in Java but all the graphics in C++.
TS1960.H36 2010 664′.9—dc22 2009037503 A catalog record for this book is available from the U.S. Library of Congress. Set in 10 on 12 pt Times by Toppan Best-set Premedia Limited Printed in Singapore Disclaimer The publisher and the author make no representations or warranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties, including without limitation warranties of fitness for a particular purpose. No warranty may be created or extended by sales or promotional materials. The advice and strategies contained herein may not be suitable for every situ- ation. This work is sold with the understanding that the publisher is not engaged in rendering legal, accounting, or other professional services. If professional assistance is required, the services of a com- petent professional person should be sought
A SIGNET BOOK from NEW AMERICAN LIBRARV TIMES MIRROR Copyright © 1967, 1973 by David Kahn All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without permission in writing from the publisher. For information address The Macmillan Company, 866 Third Avenue, New York, New York 10022. Library of Congress Catalog Card Number: 63-16109 Crown copyright is acknowledged for the following illustrations from Great Britain's Public Record Office: S.P. 53/18, no. 55, the Phelippes forgery, and P.R.O. 31/11/11, the Bergenroth reconstruction. Published by arrangement with The Macmillan Company
function. cat, cat/s, laugh/ed, un/able, sheep Free morphemes: cat, laugh, eat, red Bound morphemes: prefixes: pre- prejudge dis- dislike suffixes: -ist typist infixes attached within another morpheme. Infixation is common in languages of Southeast Asia and the Philippines, and it is also found in some Native American languages. circumfixes morphemes that are attached to a root or stem morpheme both initially and finally. Morphs: the concrete realisation of a morpheme (`was' be, past, singular) Allomorphs: a/an Types of affixes: Derivational and infelctional Derivational affixes: Derivational affixes may change the grammatical class of the root verbs into nouns, nouns into adjectives (boy, boyish), and so on. Derivation is a lexical process which actually forms a new word out of an existing one by adding affixes to stems or roots
Hüdro- ja aeromehaanika EMH5020 Kodutöö Üliõpilane: Kood: XXX Rühm: MATB-64 Juhendaja: Feliks Kaplanski Kuupäev: 27.04.2012 Tallinn 2012 1. What means vorticity? Derive vorticity transport equation in the plane and in the axisymmetric cases? 1.1 Vorticity is equal to the curl of the flow velocity. Vorticity is the tendency for elements of the fluid to "spin." Mathematically, vorticity is a vector field and is defined as the curl of the velocity field. w = curl (u ) = × u 1.2 Vorticity transport equation on the plane From the Navier-Stokes equation u 1 + u ( u ) = - p + g + v 2 u t We derive equation for two dimentional case on x-y plane (in the absence of gravity). x component:
alcohol) and carbon monoxide at very high temperatures. Formaldehyde is naturally produced in very small amounts in our bodies as a part of our normal, everyday metabolism and causes us no harm. It can also be found in the air that we breathe at home and at work, in the food we eat, and in some products that we put on our skin. A major source of formaldehyde that we breathe every day is found in smog in the lower atmosphere. Automobile exhaust from cars without catalytic converters or those using oxygenated gasoline also contain formaldehyde. At home, formaldehyde is produced by cigarettes and other tobacco products, gas cookers, and open fireplaces. It is also used as a preservative in some foods, such as some types of Italian cheeses, dried foods, and fish. Formaldehyde is found in many products used every day around the house, such as antiseptics, medicines, cosmetics, dish-washing liquids, fabric softeners,
only our mood but also physiological functions. Sculkin (2003) noted that the appraisal systems, particularly the unconscious mechanisms, are pervasive throughout the nervous system therefore it is crucial to expand the methods of measuring it. Figure 1 Figure 1. A process model of emotion regulation (Gross, 2001). Emotion regulation in relation.. 9 Much of ER is measured by self-reports, although some current research in to ER has used physiological measurements such as blood pressure in emotion suppression (Butler et al., 2002) and repression (Giese-Davis et al., 2007) where elevated blood pressure has been observed. Additionally, some functional magnetic resonance imaging (fMRI) studies have shown amygdala activity in accordance with the goal (Schaefer et al., 2002; Ochsner et al., 2002, 2004b). This suggests that whichever
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