BSA Flow Software Installation and User's Guide - CSI

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Encoder-Pulses (optional) Hardware connections 6.3.3 Cyclic Phenomena object revolution of the turbine impeller). Assuming constant angular velocity between Reset-pulses, this allows the cycle phase angle of each sample to be resolved based on the arrival time of the sample. The Reset-pulses may be taken from a shaft encoder mounted on a turbineshaft, or on the camshaft of an engine. A simple sensor detecting top dead centre can also be used, or the signal can be taken directly from an electronic valve-controller. If a shaft encoder is used, you may send encoder-pulses to the processor also, and use these instead of the arrival time to resolve the phase of each velocity sample. In most cases this will be less accurate than time-based phase-resolving, but it may be useful if for example the angular velocity is not constant in the time between Reset-pulses. Reset pulse and encoder pulses, if used, must be connected to the Synchronisation Inputs on the BSA rear panel. In the Processor properties, the connectors must be mapped to the relevant function, as described in section 6.2.2. Figure 6-41 2D Plot of output from Cyclic Phenomena (Requires Advanced Graphics add-on). Data is from a 3-blade fan. When the add-on is installed, the cyclic phenomena object will appear in the list of options, when you create a new object (See Figure 6-42 Cyclic phenomena in the list of possible new objects. Required input The Cyclic Phenomena object can be created as a child of any object which beyond sample values supplies reset information marking each cycle, and a time-stamp and/or angle-stamp for each sample. If the data recorded contain no reset-pulses you will get an error message trying to run the cyclic phenomena object. 6-40 BSA Flow Software: Options and Add-ons
Figure 6-42 Cyclic phenomena in the list of possible new objects. 2D- / 3D data The Cyclic Phenomena object can handle coincident data, which typically means from the same coincidence group. If the velocity channels are in separate groups, a Coincidence object can be added to output coincident data as input to the Cyclic Phenomena, or one Cyclic Phenomena object per group is required. A/D-Data In most cases, data samples will represent measured velocities, but the Cyclic Phenomena object can also assist in analysing data from analog transducers (e.g. pressure, temperature) as input along with velocity samples from a BSA processor. This requires the Analog Input Option. BSA Flow Software:Options and Add-ons 6-41
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BSA Flow Software Version 4.10 Inst
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1. General 1.1 Table of Contents 1.
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5.5 Optical Calibrated LDA System p
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7.2.1 Basic principles of phase Dop
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1.2 Dantec Dynamics Licence Agreeme
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1.3 Laser safety All equipment usin
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2. Introduction Congratulations wit
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2.1.9 Analog Monitor Option 2.1.10
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2.3.4 Trouble shooting 2.3.5 On-lin
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3. Installation 3.1 General 3.1.1 P
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Directory structure CPU usage will
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3.2.2 Installation as administrator
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You have the possibility to define
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Click Next and select the add-ons y
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Peer-to-peer connection Processor s
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Click on the Download tab to get th
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The BSA processor will restart. Thi
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• If the Game controller needs to
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Figure 3-2 National Instruments Mea
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3.7 Third party traverse system To
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4. The user interface 4.1 Layout Me
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4. If the mouse pointer was in the
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4.3 Project explorer shortcuts to t
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Figure 4-5 Dialog for adding object
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Using Templates To make a Template,
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4.6 The tool bar Figure 4-6 the pro
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Save As... Figure 4-10 the File men
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Figure 4-11 Save As compressed proj
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Figure 4-14 the Properties - Summar
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Figure 4-18 The Select Position dia
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Options With the Options you get a
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When Enable error logging is checke
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The fourth format, Significant Digi
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The PDA Optical Configuration objec
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4.7.7 Help menu Figure 4-34 The Hel
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4.9 Message window • by clicking
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PM and Bragg cell connections Warni
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LDA and PDA transmitting optics The
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Click on OK. Note For fully opaque
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In the third step, the software con
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Lightweight Traverse with handbox C
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57G15 Traverse interface Third part
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• right-click the Traverse Server
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4. This brings up the following dia
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To change a setting, click in the V
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Figure 4-39 System monitor in auto-
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14. You have now completed data acq
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4. Check the Show System Monitor wh
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. 8. LDA 1 properties are specific
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11. To monitor the Doppler signals,
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The axes will automatically rescale
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Click Acquire. If a complete new re
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Define the positions that you want
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Select the type of the files to ope
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5. Project explorer objects 5.1 Sta
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Browse to the file you wish to impo
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For each column, the data type must
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5.3.1 Output properties Figure 5-4
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Figure 5-7 The Custom… dialog und
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Figure 5-8 BSA F/P 30: processor pr
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Max. acquisition time: The maximum
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Normal user interface Advanced user
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Figure 5-11 The Bragg cell connecto
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LDA 1, 2, . properties: Range and g
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5.3.4 System monitor It frequently
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Scope: Burst spectrum display Recor
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Overlaid Graphs: used to show the b
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Uncheck the Use default bindings bo
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The calibration data are stored in
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5.6.1 PDA beam system The Beam syst
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Figure 5-24: Fringe direction setti
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5.6.4 Medium properties Medium name
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Software max. limit in mm.: Self ex
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The default address of the National
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Traverse coordinates of a datum poi
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5.7.8 Traverse Mesh generator If yo
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Regions Figure 5-39 Motion pattern,
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Warning Please observe strict secur
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5.9 Export Figure 5-40 Data-sources
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If multiple positions are exported
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5.9.3 Selected columns 5.9.4 Binary
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Data C Headers Programming Examples
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char filename[256] = {0}; strcpy(fi
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Range means that the filter will ap
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5.11.1 Data Properties Note that th
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Figure 5-54. Size histogram (left)
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Figure 5-57. Velocity distribution
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Figure 5-58 list output of 1D PDA d
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The next selection in the context m
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5.13.2 Objects under Merge object A
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N−1 Mean u ∑ ηiui = i= 0 N−1
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Cross-moments The property Cross-mo
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Page 187 and 188: Figure 5-71 General properties of t
Page 189 and 190: An alternative geometry of a 3D LDA
Page 191 and 192: Figure 5-75: FiberPDA phase plot. A
Page 193 and 194: 5.16.3 Display properties The defau
Page 195 and 196: The output quantities of the diamet
Page 197 and 198: 6. Options and Add-ons This chapter
Page 199 and 200: 6.1 Advanced Graphics Add-on The ma
Page 201 and 202: Figure 6-2 The Tools-Options-Output
Page 203 and 204: Figure 6-5 Scale properties for 2D
Page 205 and 206: Property group ‘Display’ Also t
Page 207 and 208: 6.1.3 2D Plot [m/s] 36 34 32 The 2D
Page 209 and 210: 6.1.4 2D Histogram For off-line use
Page 211 and 212: Configuring the 2D Histogram The co
Page 213 and 214: Configuring the 3D Plot Figure 6-21
Page 215 and 216: Figure 6-23 “Interpolate bin” s
Page 217 and 218: Property group ‘Data’ Figure 6-
Page 219 and 220: Coordinate shown on Intercepts the
Page 221 and 222: LDA1-Mean [m/ s] -2,00 -3,00 -4,00
Page 223 and 224: Figure 6-32 Properties of the Vecto
Page 225 and 226: Figure 6-33 shows a velocity vector
Page 227 and 228: 6.1.9 Exporting plots Copying a plo
Page 229 and 230: 6.2 Synchronisation Option 6.2.1 In
Page 231 and 232: Pin Signal Pin Signal 1 Out 1 14 Gr
Page 233 and 234: 6.2.5 Sync. Output Signals properti
Page 235: Outputs Figure 6-40 Differential sy
Page 239 and 240: Cycle length The property Cycle len
Page 241 and 242: It allows to define the number of b
Page 243 and 244: Note It is not possible to have 0 a
Page 245 and 246: Figure 6-47: Output data from the c
Page 247 and 248: performed prior to phase sorting yo
Page 249 and 250: Figure 6-51 Properties of the spect
Page 251 and 252: Blocking Using the FFT-approach to
Page 253 and 254: 1,2 1,0 0,8 0,6 0,4 0,2 Weight fact
Page 255 and 256: Output from the Spectrum object The
Page 257 and 258: 6.4.2 Advanced Spectrum object Load
Page 259 and 260: To evaluate the new algorithm, comp
Page 261 and 262: 6.4.3 Correlation object Conclusion
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Page 265 and 266: Time The first column of the output
Page 267 and 268: The Protocol Figure 6-67: Generic t
Page 269 and 270: How to Use the Initialisation Strin
Page 271 and 272: Figure 6-69: Traverse File option i
Page 273 and 274: Properties Output from MATLAB engin
Page 275 and 276: Result window Script Hides and disp
Page 277 and 278: 6.6.2 Calculation object from to
Page 279 and 280: Tip To combine calculated data and
Page 281 and 282: max var. max of all arguments sum v
Page 283 and 284: 6.7.3 Software set-up Once A/D-hard
Page 285 and 286: Figure 6-76 BSA F/P application win
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6.7.7 Analog input specifications J
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6.8.1 Installation 6.8.2 Hardware c
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Figure 6-85 BSA F/P application win
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6.9.1 Required hardware 6.9.2 Calib
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2. Select Parameter Input 3. The fo
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B. Select Advanced Curve fitting an
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6.10 Mobile system Monitor option T
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7. Reference guide 7.1 Theory of La
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Doppler effect d0 R(z) Figure 7-1 L
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es e2 e1 U Figure 7-3 Scattering of
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Measuring volume proportional to pa
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Laser fI Beam splitter As indicated
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7.1.6 Frequency shift • Reduce th
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As long as the particle velocity do
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7.1.7 Signals The primary result of
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7.1.8 Seeding Seeding as flow field
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150 90 180 0 180 0 180 0 210 120 24
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7.2 Theory of Phase Doppler Anemome
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D is the particle diameter. βi is
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For reflection (Equation 7-16) The
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Figure 7-21: The effect of changing
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This is the principle of the spheri
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The trajectory effect The slit effe
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Figure 7-28:The DualPDA as a combin
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Figure 7-31: Reflection and refract
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Characteristic scattering angles At
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⎛ ϕ ⎞ ϕ2 = 4arcsin⎜ ⎟ −
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Figure 7-36: The critical angle con
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Using side scatter (reflected light
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Mask Front Lens Eye-piece Spatial f
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Alignment of the eyepiece The focus
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This is often not necessary in 1D a
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For both orientations of polarizati
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Figure 7-46. The effect of changing
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Table of characteristic angles Defi
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n rel ϕ c1 ϕ b0 ϕ c2 ϕ b2 ϕ r2
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Choice of wavelength Choice of mask
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Choice of wavelength and focal leng
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Choice of polarization Choice of sc
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Focal length Transmitter (FiberFlow
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Polarization ring Fixing screw Push
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Aperture plates The particle size r
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Tighten the cable securely at each
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Disconnect the receiving fiber V1 f
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Step by step procedure Phase-Dopple
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Lower half: The lower half of the b
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Recommended acceptance angles of th
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7.7.4 Air bubble in freon Character
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7.7.6 Bubble of air in diesel oil C
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7.7.8 Glass sphere in water Charact
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7.7.10 Latex sphere in water Charac
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Blocking increases calculation spee
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In this particular example we get:
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7.9 Moments (one-time statistics) 7
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1 = N Mean D mean ui (7-31) N ∑
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Software implementation Updating me
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u v 2 2 = = ∑ ∑ tU tV 2 2 − 2
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(histogram properties). ni is the n
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volume is calculated for the class
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D30 The volume mean diameter is cal
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Three further factors are however i
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d e ln 2 max 2 V do ∗ Vt = ( 7-48
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Diameter bins The number of diamete
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Trajectory dependent detection area
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Corrected particle Max d e ( Di ) C
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Integral time-scale τI Definition
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The mean values of u(t) and v(t) ar
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Low pass filtering & Step noise Obv
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fc ≡ t 1 2 ∆ If the true signal
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Estimator bias Estimator variance S
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-again S’(f) is used to distingui
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Zero padding Often the sampling per
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As an example the Hanning window is
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The Explorer window will now look s
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8.2.2 Peer-to-Peer Configuration Co
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. High Voltage or Figure 8-3: Calib
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Invalid particles in the corners Th
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Gaussain beam effect The following
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To check for connection, right-clic
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