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| | HYLE 6-2 (2000): Biogeochemical Models in the Environmental Sciences |
 | | Dynamical systems have become the formal paradigm in the discovery of complexity across a range of disciplines: Dynamical systems as universal paradigm propelled the diffusion of complexity concepts in the empirical sciences and have become the leading paradigm for both conceptual and numerical models of complex phenomena. | | | While the mathematical behavior of the formal dynamical system is computable, the behavior of the natural system is not. | | | The dynamical system paradigm remains within the limits of an exo-physically conceived systems theory which is based on conceptually closed systems and which claims that essential, systemic properties arise from the particular configuration of system components. |
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http://www.hyle.org/journal/issues/6/haag.htm
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| | The New Type Energy System with Compound Working Material and its Dynamical Simulation |
| | The new type energy system with compound working material and its dynamical simulation is one of the sub projects of the National Key Project on Natural Sciences, which studies energy system with high efficiency and clean energy, and the internal flow in the process of its transformation of heat and work. | | | The dynamic characteristic of complex system are studied through simulation using computers. | | | The other part is the dynamic characteristic of the integrated system. |
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http://me.sjtu.edu.cn/english/scientific_research/es.htm
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| | Brazilian Journal of Physics - A review on the dynamics of water |
| | Previous simulation studies of the nonadiabatic relaxation from excited states[43] and the dynamics of solvent reorganization in response to the photoexcitation of a self-trapped electron in aqueous solution[44] have revealed that the dynamical behavior of this system is extremely rich. | | | From the theoretical viewpoint, the solvated electron is also the prototype system for mixed quantum-classical (MQC) simulations and has been extensively used in the development of new computational methodologies and the exploration of a variety of new physical phenomena in condensed media[42]. | | | In such MQC simulations the dynamics of the quantum particle (the electron) is fully described within the bath of classical solvent molecules. |
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http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000100002&lng=en&nrm=iso&tlng=en
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| | Dynamical Systems Simulation Library in C++ |
| | The goal is to produce an useful and easy programming tool for simulation of Dynamical Systems represented in the space state. | | | In the DOS implementation, together with the numerical routines to calculate the temporal evolution of a Dynamical System, there is a set of classes designed to plot and to store the results. | | | Download the library for Linux (6k): Dynamical Systems Simulation in C++ |
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http://www.cpdee.ufmg.br/~torres/simul1.html
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| | Abstracts for the IMA "Hot Topics" Workshop: Agent Based Modeling and Simulation, November 3-6, 2003 |
| | Computer simulation can be viewed as a computational approach for explicit calculation of local interactions among system piece parts, resulting in a dynamical representation of an overall system composed of those parts. | | | Polynomial dynamical systems over finite fields are amenable to analysis with tools from computational algebra and algebraic geometry. | | | A major challenge is posed by the lack of a unified mathematical framework with robust tools for modeling, simulation, control and optimization of time-critical operations in complex multicomponent and multiscaled networks. |
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http://www.ima.umn.edu/complex/abstracts/11-3abs.html
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| | System Identification |
| | Most dynamical systems can be better represented by nonlinear models, which are able to describe the global behavior of the system over the whole operating range, rather than by linear ones that are only able to approximate the system around a given operating point. | | | Subspace-based State-Space System IDentification (4SID) methods are able to deliver reliable state-space models of multivariable LTI systems directly from input-output data, requiring only a modest computational complexity without the need of (nonlinear) iterative optimization procedures (see for instance the book [25] for a unified description of the different subspace algorithms, and the survey paper [26]). | | | Identification of a class of nonlinear systems using correlation analysis. |
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http://www.fceia.unr.edu.ar/lsd/sysid.html
(1333 words)
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| | p03dtu01 |
| | This involves recognizing dynamical processes in the system and setting up the necessary ordinary differential equations (ODE) - and any constraints. | | | - use of the resulting system for simulation and | | | Simulations are used for two main purposes: to study the evolution in time of a system, and to identify parameters in a model of the system. |
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http://www.agrsci.dk/jbt/DaNet/Phd/p03dtu01.htm
(1333 words)
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| | Juergen Zobeley's home |
| | In order to reduce the computational demand of the simulations, and also in order to facilitate the identification of the key features of the dynamical systems, the availability of a suitable complexity reduction method must be considered as an indispensable prerequisite. | | | The simulation of the dynamical behavior of increasingly large cellular systems is hampered by the size and complexity of the underlying biochemical reaction network models. | | | As a result we managed to reduce the dimension n of the active space in the course of the simulation substantially ( n = 3 - 5) - even in the demanding case of the system showing a complex oscillatory behavior. |
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http://projects.villa-bosch.de/bcb/people/juergen
(1333 words)
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| | Frequency-Response Method for Rotorcraft System Identification: |
| | The identification of rotorcraft dynamic characteristics is especially difficult because of the high level of measurement noise, generally unstable vehicle dynamics, high degree of inter-axis coupling, and the high order of the helicopter dynamical system. | | | Such software packages are critical in the application of system identification tools; CIFER is the first such integrated package for the frequency-response methodology. | | | An additional 50 msec of time delay is added to dynamic models to account for a digital computer, zero-order hold, and additional digital system elements. |
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http://caffeine.arc.nasa.gov/cifer/journal/ahsj.html
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| | Molecular Dynamical Simulation of Synthetic Four-Helix Bundle Ion Channel Protein |
| | An explicit reversible multiple-time-step integrator was used to generate a dynamical trajectory, a few nanoseconds in duration for this composite system on a parallel computer, under ambient conditions. | | | In the present simulation, the channel was initially assembled as a parallel bundle in the octane portion of a phase-separated water/octane system, which provided a membrane-mimetic environment. | | | Our results, which are based on a simple united atom force-field model, suggest that the function of this synthetic ion channel is likely inextricably coupled to its dynamical behavior. |
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http://www.cmm.upenn.edu/~moore/abs/bioj98ls2.html
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| | 9:50-10:10 Quantum Dynamical Simulation of the Systems of Biological Interest |
| | 9:50-10:10 Quantum Dynamical Simulation of the Systems of Biological Interest | | | Chem., 97, 13464, 1993) to simulate the dynamics of quantum system embedded in a classical environment will be presented. | | | The method is applicable when the quantum-dynamical degrees of freedom can be described in a Hilbert space of limited dimensionality. |
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http://www.tcm.phy.cam.ac.uk/~mds21/Workshop2001/programme/node26.html
(7076 words)
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| | Visual Solutions, Inc. - VisSim Home Page |
| | is an award winning program for the modeling and simulation of complex nonlinear dynamic systems. | | | Visual Solutions' VisSim is the fastest and easiest-to-use simulation and embedded system design software available. | | | lets you simulate and generate C-code for embedded systems. |
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http://www.vissim.com
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| | Michael J. Winckler - Homepage |
| | The group currently consists of 15 members working on topics such as dynamical systems, fractal geometry and random number generators. | | | The aim is to perform a dynamical simulation of the cam-controlled valve movement inside an engine and to use methods of optimal control to improve the shape of the cam under a variety of geometrical and dynamical restrictions. | | | In applications from vehicle system dynamics (suspension simulation, vehicle simulation, towing of vehicles) the performance of these tools was optimzed to meet the needs of this special field of applications. |
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http://www.iwr.uni-heidelberg.de/~Michael.Winckler
(7076 words)
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| | Atlas: Spatial Analysis of Cumulative Voting with Dynamical System Simulation by Duane A. Cooper |
| | Atlas: Spatial Analysis of Cumulative Voting with Dynamical System Simulation by Duane A. Cooper | | | Spatial Analysis of Cumulative Voting with Dynamical System Simulation | | | Knowing the conditions for and location of the equilibria, we will analyze the model as a dynamical system to determine whether and when the candidates indeed gravitate towards the equilibrium positions. |
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http://atlas-conferences.com/c/a/k/r/45.htm
(7076 words)
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| | CapstoneJournal.txt |
| | I threw in a few comments about John Conway's Game of Life (a 2-dimensional "cellular" dynamical system) that exhibits "emergent behavior" (unexpected behavior resulting from the repeated application of simple rules to a simple underlying system). | | | Ken then conducted a discussion with the class about dynamical systems, fixed points, triangular numbers, and how these ideas might relate to genetics. | | | We spent some time talking about this and before we finished, students had brought up all sorts of interesting connections that they has learned about from movies, TV, and other courses: Mary Shelly's Frankenstein myth and its historical context; Volta's batteries and twitching frog's legs; electrocardiograms; electrical defibrillators; the electrical nature of the nervous system. |
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http://www.towson.edu/csme/mctp/Courses/Capstone/CapstoneJournal.txt
(7076 words)
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| | System Identification |
| | WA07- 1 Identification of Switching Dynamical Systems Using Multiple Models (pp. | | | WM07- 6 Noisy Input- Output System Identification Using the Least- Squares Based Algorithms | | | FP07- 4 Generalized Projection Algorithms for Identification of Mixed Uncertainty Models (pp. |
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http://www.mm.anadolu.edu.tr/ieeecss/37cdc/wa07.htm
(400 words)
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| | SBML.org - The home site for the Systems Biology Markup Language |
| | (May 14, 2005) XPPAUT is a dynamical systems package able to solve a variety of differential equations, including systems with delays and stochastics. | | | (Jan 5, 2005) SIMBA is a package from ifak system GmbH designed for dynamical simulation of wastewater treatment. | | | (November 2, 2004) BIOCHAM is an environment for modeling and simulating biochemical systems using a rule-based framework and temporal logic. |
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http://sbml.org/news.psp
(400 words)
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| | Molecular Dynamics group |
| | For processes where quantum-dynamical aspects are important, such as proton and electron transfer, a mixed quantum and classical dynamics is used. | | | On the atomic level, classical molecular dynamics (MD) simulations are carried out on systems including up to tens of thousands of particles. | | | The aim is to understand and predict macroscopic behaviour of complex biomolecular systems on the basis of interactions between atoms. |
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http://rugmd4.chem.rug.nl/md.html
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| | Reports of the Mathematical Institute Leiden |
| | The simulation of periodically forced processes in plug-flow reactors leads to the development of partial differential equations that are normally solved in time using dynamical simulation. | | | Depending on the convergence properties of the system at hand, the number of cycles that needs to be computed up to a cyclic steady state is reached, can be large. | | | However, to overcome severe memory constraints many authors have reverted to pseudo-homogeneous one-dimensional models and to coarse grid discretization, which renders such models inadequate or inaccurate. |
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http://www.math.leidenuniv.nl/reports/2003-13.shtml
(400 words)
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| | Fault-Tolerant Feedback System for Robot Control |
| | This is essential when motor and axis information are compared and helps to eliminate false error indications caused by noise, nonlinearities, and dynamical error in the mathematical model. | | | The FTF system is implemented on a single processor circuit board that plugs into the backplane of the robot-control computer and that operates between the motion-controller and servo-processor subsystems of the robot-control system. | | | The disabled mode is used for calibration of the FTF system and evaluation of the performance of the rest of the robotic system (that is, with the FTF system excluded). |
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http://www.nasatech.com/Briefs/Oct99/MSC22591.html
(728 words)
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| | Isotropic averaging for cell-dynamical-system simulation of spinodal decomposition |
| | Isotropic averaging for cell-dynamical-system simulation of spinodal decomposition | | | Averagings are employed in the cell-dynamical-system simulation of spinodal decomposition for inter-cell coupling. | | | CSIR Centre for Mathematical Modelling and Computer Simulation, Belur Campus, Bangalore 560 037, India |
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http://www.ias.ac.in/pramana/v61/p1/abs.htm
(728 words)
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| | Center for the Study of Complex Systems |
| | The Center for the Study of Complex Systems (CSCS) is a broadly interdisciplinary program at the University of Michigan designed to encourage and facilitate research and education in the general area of nonlinear, dynamical and adaptive systems. | | | If you cannot find something in these pages, it may be on the pages of our ancestral organization, the Program for the Study of Complex Systems. | | | IDEAS is an NSF funded IGERT PhD program for social science students at the University of Michigan's complex systems center (CSCS). |
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http://www.pscs.umich.edu
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| | Projects--System Identification |
| | That is, obtaining an I/O dynamical system description by using input and output data, obtained either experimentally or from simulations of a more complex model. | | | Models for control system design must be complex enough to capture adequately the behavior of the system, but simple enough to practical an applicable to controller design. | | | Model reduction techniques can be used to minimize their complexity (see here), but or group is also focusing on empirical modeling for nonlinear systems. |
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http://www.ist.uni-stuttgart.de/research/projects/SysIdent
(189 words)
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| | ACA'99 Sessions |
| | Computer Algebra for Dynamical Systems and Mechanics II | | | A new classification of planar homogeneous quadratic systems | | | Ctadel: A Computer Algebra System for the Generation of Efficient Numerical Codes for PDEs |
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http://math.unm.edu/ACA/1999/Proceedings/Sessions.html
(1017 words)
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| | Astronomy/Astrophysics Resources |
| | They are in general accord with the recommendations of the International Astronomical Union and are consistent with the IAU (1976) system of astronomical constants apart from minor modifications introduced to permit a better fit to observations; in particular, dynamical time-scales and the standard reference system of J2000.0 are used where appropiate. | | | The Planetary Data System (PDS) archives and distributes digital data from past and present NASA planetary missions, astronomical observations, and laboratory measurements. | | | Most of these data sets are in the form of computer-readable tables of numbers, rather than images. |
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http://www.library.adelaide.edu.au/guide/sci/Physics/astronom.html
(2000 words)
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| | Bad Astronomy Bulletin Board :: View topic - The relation between types of stars and whatever matter is i |
| | We present dynamical calculations which suggest that a survey of metallicities of spectroscopic binary stars can be used to understand the root cause of the stellar metallicityplanet connection. | | | I still go with the idea that multiple star systems bound gravitationally to each other would have few (if any) viable planets. | | | Stable multiple star systems would not likely occur. |
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http://www.badastronomy.com/phpBB/viewtopic.php?t=2084&highlight=
(2000 words)
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| | N-body simulation |
| | At the end of the simulation, at 330 dynamical times, the system contains 5 close binaries (with energies in the 100-200 kT range): | | | After 248 dynamical times, the core is at the point of collapse: | | | By 280 dynamical times, the core radius has expanded to about 10 times its minimum value: |
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http://www.physics.drexel.edu/~steve/n-body.html
(2000 words)
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