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Questions tagged [modeling]

Modeling is the constructing and manipulating abstract (mathematical and/or graphical) representations of economic, engineering, manufacturing, social, and other types of situations and natural phenomenon, simulated with the help of a computer system.

Modeling is the construction and manipulation of abstract (mathematical and/or graphical) representations of economic, engineering, manufacturing, social, and other types of situations and natural phenomenon, simulated with the help of a computer system.

2023 questions
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Adding time-varying covariates to a model in R

I am using the marked package in R to model variability in inter-year survival for a population. I have obtained phi (the apparent survival parameter) and p (capture/detection probability) by testing several models (comparing AIC values). This is…
N. J.
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Need review of scheduling model logic, suggestions for constraint creation and fixes for syntax errors

I am creating a scheduling model for a blending facility in Mini Zinc. I have asked a similar question earlier but I have since progressed. I will summarize what I think my existing model should do, it would be super helpful if someone could correct…
Steve Vitale
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Utilization of a service item

I'm trying to create a Bar Chart that shows the Utilization of a "service" item in Anylogic. I've created a resource pool and linked it to the service beforehand. The usual "propertyname.statsUtilization.mean()" doesn't work Can anyone help me ?
Marvin Santos da Silva
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Zero output force after one cycle

I'm making a dynamical system model in Simulink. It is a drop test on 2 springs. I want that after first drop the object will stop, so that in the accelaration graph there will be only 1 maximum. Am asking for a detailed answer. Thanks in…
user128512
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issues with data size in glmer in lme4 in R: size of data set causing convergence issues

I'm trying to model the effect of several variables on the likelihood of a self-loop occurring using glmer in the lme4 package. It's a very large data set with >900,000 data points. When I try to run the model I get this error. SLMod <- glmer(SL ~…
mikejwilliamson
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How to calculate corrleation of a independent variable(x) on multiple dependent variables (y1 and y2)?

Let's say we have 10 independent variable x1,x2,x3,...xn which all are categorical with same levels 0,1,2 (eg., 0 = no color , 1 = Red, 2 = Green) and you have two dependent(response) variables (eg., y1 = pant length in m and y2 = waist size in m).…
akhil reddy
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How do I make sure that I have deleted/updated my own record in DynamoDB without USER ID in that table

I'm quite new to DynamoDB. So I have a lot of questions about this one. I made a model relationship like below Table Relationship Many Users have many Projects One Project has many Suites Suites has many Cases Tables Model Users…
Long Nguyen
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Is there any standard diagram to stack layer modeling of software architecture

If we do some search in google images for terms like "Software Stack Diagram" or "Software Architecture", we can see lots of stack diagram that represent the software architectures of lots of systems. Especially middlewares, operating systems,…
Behnam Ghiaseddin
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How to properly use anonymous construction syntax for an optimization problem with multiple restrictions using Julia's JuMP package?

I am using Julia 1.0 with the JuMP package to solve optimization problems. These are my first days using the language. Hence, I am not really comfortable with the syntax. Following the Quick Start Guide, I was able to solve the problem bellow: I…
Pedro Delfino
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Dose-Response Model Coefficients

I've been trying to fit my data to a logistic curve. I have come across 2 different packages that I have been working with. DRM and NLS, so starting with drm I am able to fit a model which is visualized as below. Now my issue with this is the model…
Kyle
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Blender 3D objects keep intersecting when trying to position

So I am trying to make a 3D model of a chug jug, it is my first commission, and when I try to position the chug jug with the blue object that represents the drink, they keep on intersecting. I know there is a setting somewhere that disables objects…
Erik Grigoryan
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Problem with Java model to source code transformation

I have a problem with Java source code generation of Modisco java model. I used this guide below in Modisco Documentation…
Ali Sardarian
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Modelling a tides predictor

I'm just starting in machine learning learning models such as line, ridge regression, perceptron, logistic regression,gradient descent and i don't see how any of these models could be used to tackle this modelling problem ? Can anyone provide me…
John Doe
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Enterprise Architect - showing relations of inner component like it was own

I have a MyAccount application, that is consists of MyOrders, MyCases, and other MyXXX microservices. MyOrders communicates with SAP, so on the low level design I specify the relation between MyOrders and SAP. I would also like to have a high level…
Tomasz
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Modelling language for a process / transaction

I am writing my Bsc. thesis about a transaction which involves several software systems. Its basically about the communication and information exchange of a ERP system and a webservice which I am implementing. There is a module on the ERP side and…
user212926
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