Tracking method for low frame rate?

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Why does our stiff biochemical ODE model in R produce unreasonable results (negative values, NAM) despite using solvers like lsoda, vode, and rk4)?

We have developed an ODE model comprising 25 interrelated equations with common coefficients. This biochemical model, applied in wastewater treatment, is characterized by stiffness. Utilizing the...

06 July 2024 7,076 4 View

What is alternative for PMMA?

If we want to introduce a material similar to polymethyl methacrylate "with the characteristics mentioned in the next paragraph" that can be added to a precursor and create a composite, which...

03 July 2024 2,369 1 View

What is it's difference between lsoda method in R vs. ODE23 or 45 solver in MATLAB?

What is it's difference between lsoda method in R vs. ODE23 or 45 solver in MATLAB.(especially in wastewater treatment and biochemical processes) I am currently engaged in the development of a...

24 June 2024 9,188 2 View

How to reduce the optimization time in Ansys?

I am using an optimization tool in Ansys. It took two days to do optimization with my general computer. Then, I did it by using a server (high CPU and high GPU). Although I increased the system...

13 May 2024 1,215 2 View

What is relationship between Ritz, Weighted residual method, and Variational Methods in fluid mechanic?

There is a logical relationship among the three mentioned methods; however, distinguishing which one is comprehensive and which one is specialized is essential in a fluid mechanic context.

04 May 2024 4,322 2 View

How to use infinite elements in Abaqus/CEL?

Hi All, I wonder how I can use infinite elements in CEL (Coupled Eulerian-Lagrangian) models in Abaqus to absorb waves at the boundaries of the soil domain. The only available element type in...

02 April 2023 7,819 1 View

What model or software should I use to get the connection of qualitative data or codes(qualitative data is a series of titles or texts in maxqda )?

I have 7000 qualitative data with different titles which I have coded in maxqda software. What model or software should I use to get the connection of these data or codes? Meaning of qualitative...

22 March 2023 5,492 5 View

Stability of 5 chelate rings is more than 6 one?

Are the most stable Chelate rings 5 or 6 rings? For example, in the Co(OO)3 complex.

01 February 2023 4,622 0 View

Rotation between different isomers in one complex?

What is the main difference between rhombic twist and trigonal twist and berry pseudo rotation? If we have a complex like [Co(en)3]3+, how can we understand the main rotation between isomers?

31 January 2023 5,219 0 View

What structure should I report?

If we have a crystal with a coordination number of five, triangular bipyramidal(TBP) and square pyramid(SP) are expected. An intermediate state may also be obtained due to Barry's pseudo-rotation....

31 January 2023 8,223 2 View

I did hirshfeld surface analysis for molecule but did not find red spot and interaction surface in energy frame work, is it ok for research article ?

In hirshfeld surface calculation i did not find any red spot in hirshfeld surface, is it ok for research article to write?

28 July 2024 2,988 0 View

Using a large amount of data, such as 30 years of daily data, in a machine learning model like LSTM can reduce the model predictivity?

I have used 30 years of daily data, but the model is not able to optimize, getting just 0.57 in NSE and R2. when I reduced the data to 20 years in daily time frame I got 0.73 in NSE, R2 for both...

22 July 2024 669 0 View

Trial exclusion in eye-tracking data?

Is it reasonable to exclude all trials with a blink or saccade in the 150 ms before stimulus onset? As an alternative, would it be better to exclude blinks (after extending them by about 100 ms...

19 July 2024 3,838 0 View

About exosome isolation?

Hi, All, I am relatively new for exosome isolation. I used an izon column 70nm to isolate exosomes from differentiated neural cells, but the concentrations were pretty low after NTA analysis (I...

01 July 2024 2,555 0 View

As the New JCR impact factor is just released. I need a list of journals which are not tracked for impact factor this year or which are delisted?

As the New JCR impact factor is just released. I need a list of journals which are not tracked for impact factor this year or which are delisted by JCR. Thanks!

24 June 2024 6,586 2 View

Can you share experiences with the modernization of railway passenger traffic in your country?

One of the most pressing open questions for passenger rail transport concerns the sustainability and modernization of infrastructure. This issue encompasses several key aspects: Infrastructure...

22 June 2024 5,587 2 View

What is the best track to have an overview about Electronics and Communication Engineering specializations and the best track in learning ?

I want only to know the several tracks I could get into and the best way to begin.

20 June 2024 8,324 0 View

How to find out hysteretic energy consumption of the pier after earthquake excitation in sap?

how to observe the hysteretic energy consumption for a parrticular frame element

12 June 2024 3,426 1 View

How can I see the modes of vibrating in a 3D model with opensees?

Hi, I am calculating the periods of a steel building modeled as a 3D moment frame. Is there any script to display the shape of vibrating of the model in opensees?

12 June 2024 8,064 1 View

Adding a frame element into an OpenSees model after running initial?

Hi, I am running an opensees model of a 2-bay 1-storey frame with settlement at the mid-support. I wanted to add an additional frame element as a bracing to the analyzed frame after it sustains...

08 June 2024 4,131 0 View