calculation of gain

Similar Questions

• Loop of calculation of gain and phase in multisim

  I am trying to simulate the loop gain and phase for an oscillator in multisim.  I use the Middlebrook method and can get the gain in current and the gain in voltage by using the function "add the words" in the analysis.  Then, I need to use these winnings to calculate the loop gain and phase using the equation T = ((Ti*Tv)-1) /(Ti+Tv+2), where Ti and Tv are respectively the current and voltage gains.  I have been unable to bring the last expression and will appreciate any help.

  Thank you

  André

  André,

  Yes, the Middlebrook analysis technique can be implemented with Multisim.   Please see the circuit below as an example on how to apply this method in Multisim.

  Let me know if you have any questions.

  Kind regards

  Pat Noonan

  National Instruments

• How to calculate hours worked, excluding the time overlapping.

  Hello gurus,
  
  
  I need like calculating the gain for the hours worked on different projects. But I don't want to pay twice if they have overlapping of the work period.
  
  I was wondering if someone can suggest a better way to calculate the hours.
  
  I have a data in the following format:

  select 1111 as person_id, '01-AUG-11' as event_date, to_date('01-AUG-11 18:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 06:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 1111 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 03:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 06:00', 'DD-MON-YY Hh24:MI') as end_time, 'BBB' project_id from dual union all
  select 1111 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 05:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 08:00', 'DD-MON-YY Hh24:MI') as end_time, 'CCC' project_id from dual union all
  select 1111 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 11:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 15:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 2222 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 18:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 08:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 2222 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 01:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 10:00', 'DD-MON-YY Hh24:MI') as end_time, 'BBB' project_id from dual  union all
  select 3333 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 01:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 10:00', 'DD-MON-YY Hh24:MI') as end_time, 'CCC' project_id from dual 

  I would like to output following the path:
  

  select 1111 as person_id,     '01-AUG-11' as event_date,     '01-AUG-11'     as start_time,'02-AUG-11'     as end_time,'AAA' as project_id, 12 as hours from dual  union all
  select 1111,     '02-AUG-11',     '02-AUG-11'     ,'02-AUG-11'     ,'BBB', 0 as hours from dual  union all /*overlaps with row 1 */
  select 1111,     '02-AUG-11',     '02-AUG-11'     ,'02-AUG-11'     ,'CCC', 2 as hours from dual  union all /* overlaps with row 1 upto 06:00 AM */
  select 1111,     '03-AUG-11',     '03-AUG-11'     ,'03-AUG-11'     ,'AAA', 4 as hours from dual  union all  /* No overlaps */
  select  2222,     '02-AUG-11',     '02-AUG-11'     ,'03-AUG-11'     ,'AAA', 14 as hours from dual  union all 
  select  2222,     '03-AUG-11',     '03-AUG-11'     ,'03-AUG-11'     ,'BBB', 2 as hours  from dual   union all /*Overlap with row 5 upto 6:00 AM*/
  select  2222,     '03-AUG-11',     '03-AUG-11'     ,'03-AUG-11'     ,'CCC', 0 as hours  from dual   /* complete overlaps with row 6 */

  I don't like how they are showing on each line and the hours are calculated. My only requirement is that calculated hours aren't twice if there is overlap for each person.
  
  I really appreciate it if someone can help me.
  Thank you.

  with data as (
  select 1111 as person_id, '01-AUG-11' as event_date, to_date('01-AUG-11 18:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 06:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 1111 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 03:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 06:00', 'DD-MON-YY Hh24:MI') as end_time, 'BBB' project_id from dual union all
  select 1111 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 05:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('02-AUG-11 08:00', 'DD-MON-YY Hh24:MI') as end_time, 'CCC' project_id from dual union all
  select 1111 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 11:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 15:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 2222 as person_id, '02-AUG-11' as event_date, to_date('02-AUG-11 18:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 08:00', 'DD-MON-YY Hh24:MI') as end_time, 'AAA' project_id from dual union all
  select 2222 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 01:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 10:00', 'DD-MON-YY Hh24:MI') as end_time, 'BBB' project_id from dual  union all
  select 2222 as person_id, '03-AUG-11' as event_date, to_date('03-AUG-11 01:00', 'DD-MON-YY Hh24:MI') as start_time, to_date('03-AUG-11 10:00', 'DD-MON-YY Hh24:MI') as end_time, 'CCC' project_id from dual
  )
  --
  -- end of test data
  --
  select
  person_id, start_time, end_time, project_id,
  (end_time - start_time) * 24 hours,
  greatest((
    end_time - greatest(start_time, nvl(lag(end_time) over (partition by person_id order by start_time,end_time),start_time))
  ) * 24, 0) hours_no_overlap
  from data
  order by
  person_id, start_time, end_time
  ;
  

  With the [http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/functions082.htm#i1327527 url] analytical function GAL, you can get what was the time of the end of the previous row. Greatest() function then takes the value of a line start_time or end_time from previous row, whichever is the greater.

  It is a way to do that is fairly simple. If you have multiple overlaps, so it may not work completely in all cases. But maybe it can serve as a starting point for you ;-)

• Vst 5645r PXI gain / attenuation calibration chain RX TX

  Hello

  I work with PXI vst 5645r. I did some research using the RF output of the transmitter connected with the receiver RF input.

  In my application, it is important to know the equivalent mitigation and win I get (output of the DAC) generation up to the acquisition (input of the ADC) (loop gain).

  I looked at http://zone.ni.com/reference/en-XX/help/373680C-01/vstdevices/5645_analog_input/ and http://zone.ni.com/reference/en-XX/help/373680C-01/vstdevices/5645_analog_output/ in order to better understand how to build the structure of my channels.

  Whole, I looked in the drawing in labview how these parameters are controlled and value (example VST streaming (host)). I found only the configuration of gain for the transmitter in the 'LO_cal' block but I don't see no calculations for the various mitigations of transmitter. I have to check these datas for the transmitter.

  How are managed and put all these settings in the transmitter and the receiver normally?

  I guess that the receiver channel attenuates the signal in order to use the dynamic maximum range od a/d converters and use good power from receiver... calibration changes the values of gain/attenuation in the receiver string whenever I use a different gain (peak power dbm) of the issuer?

  Thanks in advance

  Best regards

  Giuseppe

  The reference level is a 'guide' for the driver VST set the attenuators and win as well as the range of the ADC/DAC are used at best.
  Depending on the frequency that you and the chosen reference level, the VST pilot will focus on the best combination of the mitigations

  and win to get the Signal arriving at the ADC to use his full range:
  You can see the calculations in this niRFRIO Group A Config 1.0.0 Shared Private.lvlibelect RF calibrated Gain.vi

  This Gain is 'Gain of frequency step-down converter' that summarize the entire path of Rf In.

  

  So practicall frequencies/Upconverter Gain step-down converter is the total analog gain that is put on the signal just before and after the ADC/DAC.
  This is done in the niRFRIO Group A Config 1.0.0 Shared Private.lvlibelect RF calibrated in Gain.vi.

  The discovery to Gain Index scan all possible power levels for this frequency and get the level closest to the chosen reference level.

  Whith this information, he knows what attenuators and win it must reach the power to get at its best at the ADC (input gain settings)

  

  So to calculate the loop gain, you must define a level of refeerence fix so that all mitigations and gain in the two paths of remain fixed, test it with a calibrated CW and then use this configuration for your DUT.

  When you read the QI of the VST (retrieve a single record) this information is passed to the function, so it can calculate the values of CDA and calibrated to their actual value on the RF In:

  

  If you calculate the gain of loop inside the FPGA, then he must send the information of step-down converter frequency/upconverter gain between the host and the FPGA. You can then use this information to calculate the loop gain.

  Best wishes

• changing PID gains

  I use the PID advanced VI to a pressure regulator and had tried to vary the winning entry proportional to the VI using an equation based on other settings, such as the behavior was similar to gain scheduling, only contiguous versus by steps.  Unfortunately, it seems that PID VI cannot handle the PID gains that are continuously variable from iteration to iteration.  The result is zero, and dig in the block diagram of the PID VI, it is barely readable, but seems to do something different in case of a detection of a change in gains of PID.  So my question is, is there a simple way to do what I'm trying to do with the provided screw OR, or am I limited to fixed PID gains?  I couldn't works around the problem by allowing the calculated algorithmically proportional gain will persist for a number of iterations before allowing an update?

  Hello

  Yes, you can.

  Don't forget: create your own copy of the VI before you change! Never change live in vi.lib!

• Lead - Lag.vi - I do not understand the calculation

  Hello

  I try to use the lead block - Lag.vi of the Toolkit, but I don't understand how it works. When you open the Panel sound, it looks like this:

  

  The indicated calculation is not what I expected, im sure that this is not how to drive of the LAGS should work. Should not be two poles and zeros? I guess that the expression of attenuation is included in the gain?

  If anyone knows and can let me know, would be great.

  Thank you

  Adam

  The VI is either directed OR Lag according to the pole / location zero. You should consider the time progresses and the delay in terms of bandwidth.

  Tlead = a * T

  Tlag = T

  If P = 1/t.

  Z = 1 / aT

• documentation error: convert the PID Gains

  There is an error in the documentation for the Convert PID Gains VI. In the table explaining the calculations for the parallel form, the documentation says (Ki = Ki') but the calculation of the VI is Ki = dT * Ki':

  

  nathand,

  I filed 595523 CAR to solve the conflicting equations.

  Daniel C.

  Technical sales engineer

• Why my reference FFT VI does not see gains multithreading?

  I am using a multicore processor to speed up the calculation of 32 FFT by running in four parallel threads, as shown in the code example below image. However, the difference in performance between single and multi-threading is only approx. 10% even on a Core 2 Quad CPU.

  I tried a few things, for example by placing the table split and merge functions or graphic waveform, outside the timed section, but this has very little effect - the main delay persists with screw FFT. These screws are already implemented reentrant, but somehow always do not perform well at the same time. Why?

  Can someone show a better performance gain in a similar VI? I'm using Labview 7.1, using pictures instead of a VI for the answers would be greatly appreciated!

  Thank you!

  

  

  Hello

  Thanks for your reply. In fact, I found the solution. Rather already internal multi-threading, the Express VI has done exactly the opposite, he broke internal capacity of multithreading, including several side bolts that were not reentrant. This means that the Global Spectral VI analysis Express is not reentrant and accelerate properly on a multi-core CPU.

  My solution was to dig in the Express VI until I found the most basic levels VI (DLL function calls etc.), which have been completely re-entrant. By extracting these and by simply registering this essential code as a new, fully environment sub - VI, I was able to unlock the potential full multi-core. My reference FFT VI runs now 5 times faster, simply by replacing the Express VI with the FFT VI stripped of myself.

  As a courtesy, I enclose my new, 5 x faster multi-core FFT VI.

  It evolves on an Intel Core 2 Quad CPU as follows:

  LabVIEW Spectral Analysis VI Express (single or multiple instances): 1 x speed

  Multi-Core FFT VI (single instance): 2.3 x 2.4 x Faster

  Multi-Core FFT VI (double instance): 3.7 x 4.0 x Faster

  Multi-Core FFT VI (quad instance): 4.8 x 6.1 x Faster

  Multi-Core FFT VI (instance octo): x 4.8 to 6.1 x Faster (could probably use a 8-core see benefits)

  Here are the internal features of the VI of FFT multi-core Lite:

  

• Rapid calculation of the exponential decay constants

  Hi all

  I try to develop a routine that quickly calculates the exponential decay of a given waveform constant.  I use two different techniques, dealing with the calculation of the directions and another using corrects successive integration (LRS).  The two usually give the correct time for the input waveform even constant with a significant amount of noise.  The LRS solution is significantly less sensitive to noise (desirable), but much more slowly (DFT computations run the order of 10s of microseconds for a waveform pt 1000, while the LRS, such that it is coded in Labview, running at about 1.5 ms).  The LRS technique has been developed by researchers at the George Fox University in Oregon, and they claim that they could perform some computation time on the order of 200 US for both techniques.  I have been unable to reach this time with the LRS technique (obviously) and attempted to use a node of the library Call to call a dll compiled this code in C.  However, at best, I get a growth factor 2 in speed.  In addition, additional calculations using the dll seem to be additive - i.e. for four calculations similar running in the same structure with no dependence on each other, the total computation time is about 4 times that of one.  In my case, this is not enough because I try to calculate 8 x to 1kH.

  Looking through the discussion, I have been unable to determine if I should wait for a performance for C gain well written on Labview well written (most seem to ask why you want to do something external).  In any case, I join the code, then you can be the judge as to if it's well-written, or if there is no improvement in performance.  The main function is the Test analysis Methods.vi that generates a wave exponential scale, offset and noise and then the decay constant tau is calculated using the VI is Tau.vi.  In addition, I am attaching the C code as well as the dll for solving the equations of LRS.  They were coded in Labview 8.6 and the C has been encoded using the latest version of Visual C++ Express Edition from Microsoft.  Themain VI uses the FPGA VI module ' Tick count to determine the rate of computation in microseconds, so if you do not have this module you should remove this code.

  Any thoughts are appreciated.  Thanks, Matt

  Hi Matt,

  After changing the summation loop in your calculation of CWR, the routine runs as fast (or faster) than the variants of the DFT... Anyway: check the results to be sure it is still correct.

• Can we realized gain and loss in option account change a system of receivables

  Hi all
  
  As process on the part of our end of month we are posting a manual log each month to clear this GL account until a balance zero.
  
  Looking at the activity they all seem to be automated AR articles published on foreign exchange transactions.
  
  Is there a way we could get these poster automatically into account 01.2201.4901 instead of 01.9000.9757? This would save we require to do the manual review and avoid situations of lack everything that made us last month.
  
  
  Kind regards
  Rahul

  Hi Raju,

  option 1

  You can modify rendering acquire and account losses from the system on receivables options screen, but it will be effective only for all new transactions that will will be created and not for the existing one...

  Option 2

  If you do not want to change the options of the system, you can override the values of the accounting period by configuring an accounting calculation rule for the Realized Gain and loss Journal line Type. Yet once it entered into force on new transactions only

  Option 3
  You can disable 01.2201.4901 and say that his replacement is 01.9000.9757 in the General Ledger module, so whenever the system would use the replacement account for automatic processing.

  Continue to run the accounting analysis report in the General ledger for the string account 01.9000.9757 every month to cross check if you spent all the manual Journal vouchers to take ZERO stock... I don't know if there is another way to perform a cross-check and minimizing the time that is consumed to present...

  Kind regards
  Ivruksha

• Gainer Focus and lost Focus

  How implements methods for gainer focus and the focus lost?
  
  Thank you

  Use a listener changes node.focusedProperty () to find out when a field wins or loses the focus.
  Call node.requestFocus () to request the update (for some reason any I have to wrap it in Platform.runLater so that he can actually do something).
  Call node.setFocusTraversable (false) If you do not want the user to be able to tab to the node, but still be able to click on the node to give it focus.
  Call node.setDisable (true) If you do not want the knot to be active at all.

  I don't know how is calculated the order of focus traversable, maybe the order in which items are added to the scene?
  Not sure how you would create a crossing of focus custom if you need.

    @Override public void start(Stage primaryStage) {
      final TextField tf1 = new TextField("First but not initially focused");
      final TextField tf2 = new TextField("Second initially focused");
      Platform.runLater(new Runnable() { public void run() { tf2.requestFocus(); } });
      final TextField tf3 = new TextField("Can focus by clicking on, but not by tabbing to.");
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      final TextField tf4 = new TextField("Cannot focus at all.");
      tf4.setDisable(true);
      tf1.focusedProperty().addListener(new ChangeListener() {
          public void changed(ObservableValue observable, Boolean oldValue, Boolean newValue) {
            if (newValue) {
              System.out.println("First text field gained focus");
            } else {
              System.out.println("First text field lost focus");
            }
          }
        }
      );
  
      VBox root = new VBox(); root.setSpacing(5);
      root.getChildren().addAll(tf1, tf2, tf3, tf4);
      primaryStage.setScene(new Scene(root, 300, 100));
      primaryStage.show();
    }
  

• Calculation of power consumption and data room AC

  Hello

  Try to understand my energy consumption of servers in respect of the installation of a new AC unit and potentially adding a UPS battery pack. Certainly not I consider myself an electrician so I would value your input.

  I based my calculations this article where, in essence, the formula is: equipment BTU = total power for all equipment x 3.5

  Q: is it safe to assume that if a server has a dual power supply to double the power used?

  After digging by some docs of dell and random sites, I gathered the information following, and I don't know if it's the correct support :

  	Power double	Power in watts	Total power
  PowerEdge 850	None	345	345
  PowerEdge 1550	None	240	240
  PowerEdge 1750	Yes	320	640
  PowerEdge 1750	Yes	320	640
  PowerEdge 1850	Yes	550	1100
  PowerEdge 1850	Yes	550	1100
  PowerEdge 1850	None	550	550
  PowerEdge 1950	Yes	670	1340
  PowerEdge 2850	Yes	700	1400
  PowerEdge 2900	Yes	930	1860
  	Large total power:		9215
  	Required total BTU:		32252.5

  1 ton of cooling = 12K BTU about needing a 2.6-ton air-conditioning unit.

  That sounds right? Your thoughts?

  Certainly I'm not including the size of the room etc. but I wanted to just make sure that I am calculating the consumption of servers correctly. I also read that they start just numbers, and the number of disks in raid and memory sticks to the server will take more power... something that... is the addition of 10W by the disk/memory stick - it true?

  Thanks for your time!

  No, you must use the pliers on the individual wires, not more of 3 or 4 wire bundle to a cord. Better to find the track to the circuit breaker box, remove the cover and block it on one of the legs of the off circuit breaker. I would like to leave plug in for a day, exercise oversight for peak power consumption. You will need to get lighting consumption included in total and heat through wall, floor, ceiling, door gain.

• base newspaper Scientific Calculator

  Hi guys,.

  I searched online for documentation on the basic button y log in scientific calculator iOS but I could not find.

  

  What is it?

  What is the inverse logarithmic function?

  If so what base? Base 10, 2 or e?

  Thanks for the help.

  This isn't an inverse logarithm, it is one logarithm using any other basis as the existing buttons for base 10 or base 2 logarithms.  The "y" is any basis you want to use for the logarithm.

  Suppose you want the logarithm of base 4 of the number 12 (i.e. log4 12).  The keystrokes you would use would be:

  • 12
  • Logie
  • 4
  • =

• Calculation of Macintosh HD

  Hi people,

  Sierra on my MacBook Air, I installed the other day and now I have HD has calculated since!

  I don't know if something is wrong or if the HD is when defective after install, but everything seems works well just the SSD saying its calculation.

  

  Cyber Hello,

  I understand that, since the upgrade to Mac OS Sierra, the storage of the about this Mac pane stated that it is the calculation. In such a situation, it can often help to rebuild your Mac Spotlight indexes.
  Rebuild the index Spotlight on your Mac.

• Leave my Calculator only recording not in the latest issue

  I have been using the calculator that comes with OS X to keep my checkbook balanced for a few years. In general/system preferences, I don't have not 'Close them windows when you exit an application' checked. This should I want to open the calculator with the last number still saved. He has in the past, but since the upgrade to Mac os Sierra, calculator saves what I had (except on the Strip). Is there something I can do to recover this feature?

  I can check your results even if I do not remember if she previously recorded the last number. I don't know if it's a change of function or a bug etc, but I think it's something Apple should change. You could install PCalc for the App Store. It is not free, but it does a lot more.