Is Q of the EM algorithm non-decreasing?

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Why are there two reduction peaks in my cyclic voltammogram?

When I measured the cyclic voltammogram of palladium in the pbs solution, two reduction peaks appeared. This did not match the literature I saw. Why? And how can I find the possible reaction...

20 February 2021 2,486 3 View

How can I get rid of the bubbles in the SBS membrane?

I used methylcyclohexane/ ethylcyclohexane / n-butyl acetate mixed solvent to dissolve thermoplastic SBS & terpene resin. The mixture is then poured onto a glass substrate. After solvent...

24 January 2021 8,306 3 View

Which configuration of seawater treatment is better?

Hi world, I have a curious question about desalination of seawater. Since seawater contains a alarming amount of suspended solids and salt (35 ppt). Which of these configuration is more viable...

03 January 2021 2,383 2 View

Why oxidation with peracetic acid engender staining of oxytalan fibers with clastic tissue stains?

Just a quick question above, this oxidation method is mentioned by literature, but no one talked about the principle. Can anyone figure out how the oxidation works on any specific group?

20 December 2020 5,878 1 View

Is this yeast contamination and how do I get rid of it?

I received this gastric tumor biopsis and processed using standard protocol to establish gastric cancer organoids. Contamination looks like this. I have never seen this before and the culture...

08 November 2020 8,541 4 View

I am trying to design a desalination reverse osmosis membrane system. May I know is there a way to obtain the calculation steps for the design?

Designing a desalination reverse osmosis membrane system. Could someone recommend me some designing publications or a step by step calculation guide for the design? Much appreciate. Thanks :)

06 November 2020 7,565 3 View

Are there any structural differences between sucrosic dolomite and saddle dolomite?

Sucrosic and saddle dolomite are known to be different petrographically. However, are they different in structure, e.g., under XRD or TEM?

20 September 2020 2,495 2 View

Is there a function coded by matlab to reproject the geographic raster data?

Is there a function coded by matlab to reproject the geographic raster data?especially for the case converting the Ease-Grid 2.0 to the geographic coordinate.

17 June 2020 7,875 2 View

Can someone recommend some books about analyzing EEG data based on python?

I am learning to use the tool MNE. It has a great web-based tutorial, but the tutorial is not so systematic and detailed like a book. I have seen some people recommending the book "Analyzing...

26 March 2020 5,098 2 View

Why does my HPLC filter always generate air bubbles?

I have an old HPLC machine. Every time when I put my filter into 50%:50% water and acetonitrile mixture, my filter always generate bubbles. However, once I change the solvent to 100% acetonitrile,...

08 March 2020 5,587 4 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

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How to approach CFD simulation results of a flow past a cylinder?

Hi all, I'm doing a transient simulation of flow past a rectangular cylinder close to the free surface. As far as I'm concerned, the common practice is to discard the initial stages of the...

25 February 2021 1,348 3 View

Error in comsol?

Dear respected researchers, while performing CFD analysis in Comsol it's showing like this Error: Nonlinear solver did not converge. The maximum number of Newton iterations reached can...

24 February 2021 249 3 View

How to constrain genetic algorithm input u?

My real system (buck converter) can only take an input of 0 to 1 (duty ratio) and I need to constrain the system so the controller action keeps within this bounds. How can I do this? The code for...

22 February 2021 2,125 3 View

How to overcome convergence issues in concrete arch models?

Hi, I have modelled a three-span arch bridge with soil fill over along with pedestals. The FE modelling is done in LUSAS with HX8M solid elements (i.e. 3D solid modelling). The non-linearity is...

20 February 2021 1,346 2 View

Comsol Maximum number of Newton iterations reached?

Comsol is investigating deformation due to gravity. Gravity is applied to the nanosheets to check for displacement and stress. If I input the Young's modulus of the channel to about 1 [GPa], the...

15 February 2021 6,027 3 View

Is Genetic Algorithm usage for Motor Conception FEA optimization a good choice?

Hi RG community, Like the title shows ,i was wondering if choosing the GA for this kind of Optimizaiton is a good choice? For example we have a population of 100 (for 7-8 Optimization Variables),...

14 February 2021 1,160 7 View