What are the advantages and disadvantages of analytical and semianalytical methods over numerical methods like FEM and FDM?

What are the advantages and disadvantages of analytical and semi-analytical methods over numerical methods like FEM and FDM? I am looking for detailed advantages and disadvantages.

31 December 2018 7,984 3 View

How to define a position dependent loading in Ansys?

How to define a force, function of displacement and time derivative in Ansys transient analysis, for example the forced vibration problem of cantilevered beam with a dynamic f(x,t) force acting at...

09 October 2018 6,311 0 View

Could anyone suggests some experimental researches (results) of free vibrations of laminated composite plates fully covered with piezoelectric layers?

Could anyone suggests some experimental researches (results) of free vibrations of laminated rectangular composite plates fully covered with piezoelectric layers?

07 August 2018 4,784 2 View

Do external voltages exerted on electrodes of piezo-layer affect the natural frequencies, or they play the role of external load?

Consider a single piezoelectric layer (plate), polarized in its thickness direction and a top and bottom electrodes with nonzero external voltages exerted on them. Do this external voltages affect...

05 June 2018 4,918 4 View

Frequency inconsistencies in rectangular composite plate?

04 May 2018 2,929 0 View

Could some body explain what the thickness mode frequencies are in a piezoelectric plate?

I have analysed free vibration of square piezoelectric plate layer with Ansys. (0.1m ,0.1m ,0.01m) I am looking for thickness mode frequencies, but dont know which of them are. Could somebody...

09 October 2017 5,556 0 View

What is the value of shear correction factor for (piezo)composite plates?

08 September 2017 4,514 3 View

How to find close form inverse of a large symbolic matrix in Matlab?

I have a big 1000*1000 symbolic matrix (some of its diagonal entries are function of x variable), is there a trick way to calculate closed form inverse of a such matrices in Matlab or Maple?

08 September 2017 4,307 4 View

Is there any commercial FEM software package that has shell elements to model piezoelectric materials?

08 September 2017 1,478 4 View

How to implement short circuit and open circuit B.C on a piezoelectric patch in ANSYS?

I want to analyse the free vibration of a piezoelectric patch at open and short circuited condition in ANSYS. Do you know how to implement short circuit and open circuit B.C on a piezoelectric...

06 July 2017 5,682 1 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Should we change media after1st 6hrs after plating HUVEC bought from INVITROGEN?it's not recomended by invitrogen.Will DMSO present in stock matter?

We have HUVEC bought from Invitrogen. Cat no -C-003-5c. while first plating the cells we have bought the protocol suggests not to centrifuge the cell with media to remove the DMSO. Should we...

02 March 2021 3,713 2 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View