How do we treat zero values in a time series before running Holt Winters Multiplicative model?

I want to understand the functioning of a tool. I've been told that the tool performs multiplicative decomposition of the time series before forecasting. I've managed to decompose the series in R...

02 March 2019 3,430 4 View

I need images of machine parts (automotive industry) to perform damaged parts detection. Please help!!?

Aim is damaged part detection (i.e. scratch, dent, holes, pits, etc.): e.g. Automotive/Industrial part stamping quality inspection, Rolled sheet metal surface inspection, Pit/hole detection in...

04 May 2018 9,257 1 View

How does degree of intercalation depend on graphite particle size in liquid intercalation (H2SO4-HNO3)? Can oxidation occur in very fine particles?

I wish to intercalate very fine graphite particles through a mixture of concentrated H2SO4 and HNO3. Normally, small particle size results in greater degree of intercalation. Is it possible for...

04 May 2017 2,747 2 View

Can I perform an electrochemical reaction in parts?

I have a reaction which will most likely take around 10 full days to finish. Since the equipment in my lab can not run for so long continuously, I was wondering if I could perform the reaction in...

02 March 2017 4,671 2 View

Can I use a muffle furnace instead of microwave irradiation for preparation of expandable graphite?

I am trying to prepare expanded graphite. During literature review, I came across heat treatment, ultrasonic irradiation and microwave irradiation as methods of expansion after intercalation. Due...

08 September 2016 6,408 7 View

Calculate value of 'c' parameter for intercalated graphite using XRD data?

01 January 1970 750 4 View

How to prepare graphite electrode from graphite powder, to be used in in electrochemical reaction using aqueous and concentrated H2SO4 electrolytes?

01 January 1970 7,171 3 View

Could you help me with some basic concerns regarding graphite expansion?

Hey there! I am working on non-oxidative intercalation and expansion of graphite using sulfuric acid. I've investigated both electrochemical and liquid intercalation methods using 2*2 cm of...

01 January 1970 8,522 1 View

How to perform XRD of very small graphite sheet sample?

I have a very small sample of graphite sheet (10mg, 36mm2) of which I need to perform XRD. The detected area of the instrument I am using is 6.25cm2. How can I perform XRD of such small sample?...

01 January 1970 5,594 3 View

Can I use Ag/AgCl electrode with concentrate H2SO4 (~18 M)?

My experiment is to be conducted at room temperature, for intercalation of graphite.

01 January 1970 2,102 0 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

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 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

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

Is there any rich, publicly available English literary corpus?

Hi everyone. I am looking for a rich corpus in English literature, a one which includes literary prose ( e.g., novels or short stories) . can anyone propose a good one? Best regards Fatemeh

01 March 2021 1,970 2 View