Hi everyone!
Could you explain to me why we need calculate equivalent noise bandwidth (ENBW) for window functions (for example Hanning window)?
Hi everyone! I'm reading a book on noise and vibration analysis. And i knew that how to calculate a RMS value of periodic signal (x(n)) by: xRMS = sqrt(sum(XL^2(k)) / Ben) where: xRMS is RMS value...
02 March 2018 3,706 0 View
Hello everyone! I have a problem, that is when i perform a finite element analysis (for example, to a beam that has high of across-section is invariant), i can easily have a formular of element...
11 December 2017 9,762 0 View
Hi everyone! Now, i'm reading a book "Noise and vibration analysis" by Anders Brandt. And in this book, the author wrote that we can change bandwidth of a measured signal using resample...
09 October 2017 6,659 7 View
Hi everyone! Now, i reading a book "modal testing: theory and practice" by Prof D.J.Ewin. And in this book, Prof D.J.Ewin wrote:" those with extremely light damping, for which measurements at...
07 August 2017 3,702 1 View
Now, i'm reading the book " Modal testing theory and practice" by D.J. Ewins. And i have a problem to non-proportional structural damping. With proportional structural damping ([D] = beta*[M] +...
06 July 2017 4,976 17 View
Hi. If i do a modal analysis for a structure. And, I use different damping models (such as: viscous damping model, structural damping, and so on.). So, How is effect of using different damping...
05 June 2017 7,412 7 View
Hi. When i do a modal test on any structures. So, How many can i select number of measurement points? How can i select locations to put sensors? And, the end, what does they depend on? Thank you.
05 June 2017 7,346 2 View
Hi, I calculated dynamic response of a beam subjected to moving load using mode superposition method in time domain. And now, i want to calculate IN FREQUENCY DOMAIN. But, i don't understand mode...
03 April 2017 7,231 0 View
I attempted to make a privately uploaded text public but a window appeared that said an error occurred. There was no explanation provided as to why there was an error or what might be done to...
05 August 2024 8,025 7 View
DOS version.
29 July 2024 6,064 1 View
The threshold voltage (Vth) of a MOS device plays a crucial role for its operation. At the same time, noise is an intrinsic factor. So how noise (flicker or thermal) change with the change in...
29 July 2024 3,246 0 View
I need a reliable source or an example supported by excel sheet to understand Fuzzy Vikor?
27 July 2024 5,916 1 View
The Louvain method – named after the University of Louvain where Blondel et al. developed the algorithm – finds communities by optimizing modularity locally for every node’s neighborhood, then...
23 July 2024 6,659 0 View
hi, I am doing a risk analysis of a cylindrical fuselage with windows. I have applied contact interactions between the different parts, and I have applied a unit value load to a reference point,...
20 July 2024 647 2 View
I used during a long time the program SNLO (Qmix) using computers with Windows XP, 7 and 10. First time this program worked also under Windows 11. Now (probably after the last system update) Qmix...
09 July 2024 7,243 1 View
We aim to detect p62 protein expression levels. Previously, we worked with the p62 antibody (Cat. No: A19700, dilution 1:1,000, ABclonal) and obtained excellent results. However, we switched to a...
20 June 2024 327 3 View
How to choose energy window and get data for microcanonical average .
11 June 2024 5,436 2 View
I am currently seeking software capable of calculating audible corona noise in HV overhead transmission lines under various meteorological conditions. I would greatly appreciate any...
10 June 2024 1,305 0 View