How to read an HPLC report?

I have four HPLC graphs (for methyl ethyl ketone (MEK) and sulfuric acid and little organic monomers) and I want to analyze them. Is there anyone who can help me with this?

23 December 2020 6,180 3 View

The characteristic length of a vertical sinusoidal wall with natural convection?

What is the characteristic length of a vertical sinusoidal wall with natural convection to calculate Rayleigh number? (x represents characteristic length in the attached formula)

21 September 2020 8,736 5 View

What drag model for simulating a fluidized bed with geldart D particles do you propose?

The minimum fluidization velocity is 1.17 m/s and the average diameter of the particles is 2.6 mm with a sphericity factor of 0.9 I am using an Eulerian-Lagrangian approach and these are the...

02 August 2020 646 2 View

Is it possible to model the non-Newtonian Lubrication in comsol?

I want to know that is it possible to model the Bingham lubrication in Hydrodynamic module or thin fluid film module? or mabey I should use another module? #nonnewtonian lubrication #Comsol...

26 June 2020 1,715 5 View

How can i simulate the non-Newtonian lubricant for Hydrodynamic bearing in Comsol multiphysics?

In Comsol multiphysics, the bearing can simulate by Hydrodynamic bearing or thin fluid film module. But when I want to add a constitutive equation for viscosity the shear rate can not appear as a...

15 June 2020 4,948 3 View

How the transport experts define a transportation model?

a transport model (e.g logit model or ...) is based on statistical data and field works or merely based on mathematical theories or both of them? If I want to define a model ( e.g. a new model in...

19 May 2020 1,768 3 View

Numerical Modelling of Natural Convection using Comsol: 2-Step solution or 1-step?

I am modelling air natural convection in a vertical channel with open boundary end by means of Comsol Multiphyscis. I am interested in the stationary solution. There are two different approaches...

03 March 2020 5,686 7 View

What are proper machine learning algorithms to extract relationship among variables?

I'm dealing with a supervised problem which includes three features. My main purpose is to find the relationship among these features which is complicated. I'm looking for a straight relationship,...

10 October 2019 3,337 9 View

Is it possible to illustrate crowdsourcing as a graph? and is it possible to monitor activities of members of this graph?

Recently, I'm starting a research project about "crowdsourcing" and I've two questions about the nature of crowdsourcing. 1. Is it possible to illustrate crowdsourcing as a graph? I mean is it...

23 September 2019 5,446 3 View

For a Multiple Effect Desalination system (MED), how is it possible to evaluate the real capital cost as an industrial case??

for a Multiple Effect Desalination system (MED), how is it possible to evaluate the real capital cost as an industrial case?

12 June 2019 2,456 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

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Hello fellow researcher .. What is the meaning of your name?

I would like to create a small guide containing the meanings of the names .. Thanks to everyone who cooperates with me in achieving it.

03 March 2021 5,266 4 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

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 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

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 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