Introduction to Statistics for Economists Prof. Safarzadeh Assignment # 2 Student Name: ________________ Answer all the questions on the spaces provided. Underline your answers and show your calculations and work on the tables. Item |Speed |Mileage | | |X - X |(X- X)2 |(Y-Y) |(Y-Y)2 |(X-X)(Y-Y) | | | |1 | 30 | 25 | | | | | | | | | | |2 | 50 | 20 | | | | | | | | | | |3 | 35 | 23 | | | | | | | | | | |4 | 45 | 21 | | | | | | | | | | |5 | 40 | 23 | | | | | | | | | | |6 | 25 | 32 | | |
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parameters fall into two broad categories. Microscopic parameters: describe traffic stream as a whole. Major macroscopic parameters are * Volume (rate of flow) * Speed * Density Microscopic parameters: describe the behavior of individual vehicles within the traffic stream. Major microscopic parameters are * Speed of individual vehicles * Headway * Spacing 1. Flow or Volume (Q) There are practically two ways of defining flow or volume on a road. One is defined as the number
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some wind speeds [35]. The passive stall control was mainly used in early fixed-speed turbines. This control technique was further improved into the active stall technology [35]. Using the active stall control‚ it is possible to maintain the rated
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The speed of an asynchronous motor rotating field and thus its rotor speed depends on the number of pairs of poles in the stator field .the rotor speeds n are lower than the table values by the amount of the relevant slip speed ns. Motors are designed with up to three stators windings‚ which have different number of pairs of poles. They can therefore run at up to pairs of poles. They can be in any desired ratio to one another. A pole-changing switch is used to changing poles for the desires speed
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damage‚ high speed‚ because they can hunt and run away faster‚ high intimidation‚ because they will be less likely to be attacked‚ and high attack‚ because they will be able to kill stuff more easily. Materials List: Computer My evolution simulator Observer Procedure: Create/download my evolution simulator. Run my evolution simulator. Record the creatures that there are the most of. Repeat steps 2-3 two times. Data Table: Run #1 Time (ticks) Dominant Creature 100 Run Speed: 2‚ Name: 0
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of a wind turbine followed by a power electronic converter which is connected to the stator of the generator. Fig 3.16 Variable speed driven (gear less) wind turbine with a Synchronous Generator Cage-bar induction generator and synchronous generator are the two options available to be used. The gearbox is designed so that maximum rotor speed corresponds to rated speed of the generator. Synchronous generators or permanent-magnet synchronous generators can be designed with multiple poles which imply
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widely used in field applications because of their many advantages over AC motors such as speed control‚ high starting torque‚ quick starting‚ stopping‚ reverse and acceleration and free from harmonics found in AC. Applications of DC motors include but are not limited to: Transportation such as electrical locomotives‚ rapid transit systems and trolley cars Cranes‚ hoists and in conveyers Rolling mills Constant speed lathes Centrifugal pumps‚ fans‚ blowers‚ reciprocal pumps and machine tools like drills
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INTRODUCTION During the nineteenth century‚ when power supply was dc‚ dc motors were used extensively to draw power direct from the dc source. The motor speed could be varied by adjusting field current by a rheostat. That was an open loop control. Most of the drives were constant speed and the characteristics could not be matched with a job requirement. A vast development in the dc drives system took place when the ward Leonard Control System was introduced in the 1980s. The system
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body through your pooper‚ speed‚ noise and degree of pain may vary depending on what you ate. even the soda at taco bell makes me poop.Bodily waste of varying color‚ viscosity‚ shape‚ odor and texture. Usually exits the body through your pooper‚ speed‚ noise and degree of pain may vary depending on what you ate. even the soda at taco bell makes me poop.Bodily waste of varying color‚ viscosity‚ shape‚ odor and texture. Usually exits the body through your pooper‚ speed‚ noise and degree of pain may
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…………………………………………………………. 8 Speed control of shunt motor …………………………………………………… 10 39.5.1 Speed control by varying armature resistance. ………………………... 10 39.5.2 Speed control by varying field current. ………………………………... 12 39.5.3 Speed control by armature voltage variation. …………………………. 14 39.5.4 Ward Leonard method: combination of Va and If control. …………… 14 Series motor. …………………………………………………………………....... 15 39.6.1 39.7 39.8 Characteristics of series motor. ………………………………………. 16 Speed control of series motor
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