In SEM, while extracting the factors from a set of observed variables, is it principal component analysis (PCA) or Factor Analysis?

In SEM, while extracting the factors from a set of observed variables, is it principal component analysis (PCA) or Factor Analysis?

10 November 2018 1,326 2 View

In SEM, what is the physical significance of eigen value while doing principal component analysis (PCA)?

In SEM, what is the physical significance of eigen value while doing principal component analysis (PCA)?

10 November 2018 7,279 4 View

What is the correct formula for availability; MTBF/MTBF+MTTR or MTTF/MTBF and why?

I am very confused about the formula for availability because it is given by uptime/uptime+downtime.

07 August 2018 6,518 4 View

In Taguchi Method, why the degree of freedom for a factor is given by formula (level-1)?

I cannot understand why 1 is subtracted from the level to find out the degree of freedom?

06 July 2018 688 1 View

How one can explain the meaning of software reliability giving an example and mentioning the name of a specific software?

The functionality of a machine can gradually decrease due to tear and wear. Hence, reliabilty of a machine is an important phenomenon with time. But how the functionality of a software can get...

06 July 2018 7,795 0 View

Does failure function represent the probability density of failure rate?

If f(t) represents the probability density of failure rate, then how it it possible that f(t) will follow exponential distribution whereas the failure rate is constant?

06 July 2018 5,318 5 View

How the formula for failure rate R(t1)-R(t2)/(t2-t1)Rt1 is derived?

Please state the derivation of the formula of failure rate.

06 July 2018 1,104 2 View

What are the differences among flexible manufacturing system (FMS), computer integrated manufacturing (CIM) and totally integrated automation (TIA)?

What are the differences among flexible manufacturing system (FMS), computer integrated manufacturing (CIM) and totally integrated automation (TIA)?

05 June 2018 9,929 4 View

MICLASS and DCLASS coding system in group technology follow which type of coding: monocode, polycode or mixcode?

MICLASS and DCLASS coding system in group technology follow which type of coding: monocode, polycode or mixcode? Why Opitz classification and coding system is a mixed code. I can understand that...

05 June 2018 2,636 2 View

In structural equation modelling (SEM), how to collect the data of the indicators under a moderator variable (please see the explanation)?

Suppose, I have two predictor/independent variables A and B that (i.e. both A and B) affect a dependent variable D. I have also a moderator variable C that influences the relationship between A...

05 June 2018 1,063 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 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

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 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

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