Structural Equation Modelling tutorial ?

Hello, i need a basic tutorial on Structural Equation Modellling, available on line ; it needs not cover the advanced topics as i plan to use it as a support for a newby "crash course" I would...

02 March 2015 457 7 View

Can someone point me towards tight bounds for the cumulative distribution of a multinomial ?

I would be grateful for pointers to tight bounds fo the cumulative distribution of a multinomial (tight meaning tighter than the lower bound that can be obtained from the union bound ! pointer to...

02 March 2015 4,865 5 View

Do you have a Chu Liu Edmonds Minimum Spanning Tree for Python?

Dear colleagues, I am looking for a python implementation of the Chu-Liu-Edmonds algorithm (minimum spanning tree in a directed graph). My graphs are rather small (a hundred nodes typically) and...

01 February 2015 3,129 2 View

Is there any known analytical result or (very) fast algorithm (with proof of correctness) giving the maximum likelihood sample from a multinomial?

Is there any known analytical result or (very) fast algorithm (with proof of correctness) giving the maximum likelihood sample when drawing from the Multinomial MULT(N ; P1 ... PM), with N...

31 December 2014 444 6 View

What are the false positive/false negative rates when using a random portion of a Bloom filter for membership query ?

Suppose I have encoded a set of cardinality n in a standard Bloom filter (m bits, k hash functions). I randomly select p bits from the Bloom filter and run the membership query with those p bits...

09 October 2014 1,023 6 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

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

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 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

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 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