Day

Last seen: environ un mois il y a | Actif depuis 2023

Followers: 0 Following: 0

Statistiques

Feeds

Question

Changing the result of a simulation with changing the units
Hi, If the injected amount in model compartments is in mole and the transfer rates are in 1/hour. I set the domensional analys...

environ un mois il y a | 1 réponse | 0

1

réponse

Question

How to find the sensitivity of the model output if it is a variable for repeated assignment?
Hi, I want to find the sensitivity of model output which is a tissue mass for models parameters. I received an red flag that ...

environ 2 mois il y a | 2 réponses | 0

2

réponses

Question

how to handle the error 'Levenberg-Marquardt algorithm the Jacobian at BETA0 is ill-conditioned'?
Hi, I try to run the fit in Simbiology using 'mixed effects' modeling. The transformation is exp(theta1+eta1). The 'error model...

environ 2 mois il y a | 1 réponse | 0

1

réponse

Question

Why are population estimated parameters values the same as individual estimated parameters values?
Hi, I good patients data. I did population fit 'mixed effect'. The fits for individual patients were very good but the populati...

environ 2 mois il y a | 1 réponse | 0

1

réponse

Question

Investigating the effect of two covariates to an estimated parameter
Hi, I have data for different patients and I want to investigate the effect of two covariates to an estimated parameter while...

environ 2 mois il y a | 1 réponse | 0

1

réponse

Question

changes the the simulated mass with changing the absolute and relative tolerance
Hi, The mass of the tissue under the effect of a drug goes to very small values, i.e. in the order 10^-12, which is unrealistic...

6 mois il y a | 1 réponse | 0

1

réponse

Question

species go to negative values
Hi I developed a model in Simbiology simulating the effect of a drug on a tissue mass. Sometime, I received a message that the...

6 mois il y a | 2 réponses | 0

2

réponses

Question

different event functions for the same species
Hi, I developed a model in Simbiology in which Fw is a parameter as a function of mass. The mass varies with time. I wa...

7 mois il y a | 1 réponse | 0

1

réponse

Question

A variable is specified by more than one assignment rule
Hi, I have a species A_Total = a + b + c, where a, b and c are other species in the same compartment. I have to set a boundary...

7 mois il y a | 1 réponse | 0

1

réponse

Question

Lognormal distribution parameters mu and sigma
Hi, I want to generate a lognormal distribution for a set of data measurments using Simbiology model analyzer. I need to inser...

8 mois il y a | 3 réponses | 0

3

réponses

Question

Extracting Histogram data for plot generation
Hi, I generated a sample of lognormal distribution using Simbiology analyzer. I want to extract the data of the samples' hist...

8 mois il y a | 2 réponses | 0

2

réponses

Question

Dimensional analysis issue because of the function 'log' in the rule
Hi! When I run a simulation in my model developed in Simbiolog, I received the following warning message: "Unable to perform d...

8 mois il y a | 1 réponse | 0

1

réponse

Question

Sensitivity analysis in Simbiology
Hi, I want to perform sensitivity analysis for my Simbiology model. I have encountered the following error. Would you please ex...

11 mois il y a | 1 réponse | 0

1

réponse

Question

Change in simulation output with changing in the units of stop time
Hi, I defined units for all parameters in my Smbiology model and the model runs simulations. The unit of time for all paramet...

environ un an il y a | 1 réponse | 0

1

réponse

Question

Failure of dimensional analysis for a rule
Hi, I have a rule y=x^0.35. x has the dimension of mass. An error message showed up saying that the exponent must be an integer...

environ un an il y a | 2 réponses | 0

2

réponses

Question

Dimension of the species
Hi, In my model in Simbiology, it has a species with dimension of (molecules/time) and connected with a release rate reaction. ...

environ un an il y a | 1 réponse | 0

1

réponse

Question

Adding erf(x) to a rule in Simbiology
Hello, I have a rule in my model Y(x) = x, for example, in Simbiology app. I want o add the erf(x) for Y(x) to run a simulati...