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Questions tagged [stability]

152 questions
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Matlab- closed loop transfer function frequency tracking

I hope I can explain my problem well enough, Let's say I have a closed loop control system, and I know the given physical plant Gp (the compensator and the feedback transfer func is 1). The question is to check whether the system can track a…
Roman Andreevitch Biriukov
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Stability of large Hazelcast cluster

We have (won't be true for too long, if the powers that be have their way) a reasonably large cluster of about 600 nodes, all of them under the same "Group Name", while only a fraction of them (about a dozen) ever made it into the list of TCP/IP…
SriniMurthy
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Variations in measurements of parallel code

I have way too much difference between different runs of sequential and, especially, parallel code. For example, the sequential version takes 418s. The parallel versions take: 2 threads - 250.630453 ; 339.735046 ; 256.153005 ; 256.153005 ;…
a3mlord
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Topic stability in LDA models

My major is bioinformatics and I want to use LDA (Latent Dirichlet Allocation) to explain histone code of a lot of genes. I used the LDA model in my project, when I re-run my topic models with a different random seed, the topic terms seem to change…
Fiona_Wang
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what's an example of a physical system that is not robustly stable?

I'm having some problems figuring out a system that it's stable for some values of its physical properties but unstable for others. Even a basic example would help a lot, a dimension 2 is totally fine. I do not have problems figuring out what…
user1834153
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universal analytics stability

I've had issues with either google ads or google analytics in the past (crashes in pre ARC times). How stable is their ios code these days? P.S. bonus question: how easy it's to reuse that sdk to point it to a server of my own (self…
Anton Tropashko
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Finding the stability boundary of a nonlinear differential equation using Matlab

I have been stuck into this problem for weeks. How do I find the stability (or attraction ) region of a nonlinear differential equation using Matlab. Let's say I have this equation: x' = y; y' = -10*sin(x) - y + 9; The equilibrium point for this…
Abdallah
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Directed Acyclic Graph with multi-parent nodes

Given: A directed acyclic graph with weighted edges, where a node can have multiple parents. Problem: For each child of root node, find a minimum-cost(sum of weights) path from such a child to some leaf which can be reached. A node can only be…
rajkn90
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C++ program stability after millions of executions

I have a program in C++ that performs mainly matrix multiplcations, additions and so on. The problem is, a EXC_BAD_ACCESS happens when the calculation performs for about 3 million times. Is there any possible problems that can arise when a problem…
Lewen
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Measuring network performance tool in c#

I am about to develop a Network measurement tool. The objective is to make a tool, which can measure the responsetime in between a client and a server machine (from the client side). It is s side-application to a main application - If the main…
Sagi1981
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Spotting the point at which data stabilises using standard Bash utilities

I have a set of data (two columns of CSV numbers) which varies quite a bit initially and then stabilises around a certain number. I'm trying to spot the point at which the graph first seems to stabilise in an automated way using standard Bash…
d3pd
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Metric for Image Instability for Mobile Photo Capture [Stability Detection]

As you've read on the title, I have a project on photo capture on mobile devices. I am supposed to detect if the real-time input to the camera of a mobile device is stable or not. But so far, all I've been seeing is on stabilization itself, mostly…
joalT
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sort and stability

I would like to know why merge sort is stable and quick sort is not. I know if the relative order is preserved all the time then it's stable. shouldn't merge sort still do tie breaking? will it be still stable when it doesn't do tie breaking? I…
in His Steps
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For Complete ERP Development: CakePHP or CodeIgniter?

I'm new here, but I assure you that I've read the other question/answers related to my question of which is better and I have to say they are outdated. CakePHP 2.0 is out and it seems to be a major improvement in terms of functionality and speed…
Arto Kalishian
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Why should stabsel results differ between fitfun = lars.lasso and fitfun = glmnet.lasso?

I have applied the R function stabs::stabsel to the same data twice: one with fitfun = lars.lasso and the second time with fitfun = glmnet.lasso. With all else held constant (same PFER, cut-off, sampling type), why should the results (selected…
ke.re
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