منابع مشابه
constant-temperature molecular dynamics simulations
We discuss the use of a Langevin equation with a colored (correlated) noise to perform constanttemperature molecular dynamics simulations. Since the equations of motion are linear in nature, it is easy to predict the response of a Hamiltonian system to such a thermostat and to tune at will the relaxation time of modes of different frequency. This allows one to optimize the time needed to therma...
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The wavefunction of a single spin system in a prepared initial state evolves to equilibrium with a heat bath. The average spin q(t) = p↑(t)− p↓(t) exhibits a characteristic time for this evolution. With the proper choice of spin flip rates, a dynamical Ising model (Glauber) can be constructed with the same characteristic time for transition of the average spin to equilibrium. The Glauber dynami...
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We work out the method for evaluating the QCD coupling constant at finite temperature (T ) by making use of the finite T renormalization group equation up to the one-loop order on the basis of the background field method with the imaginary time formalism. The background field method, which maintains the explicit gauge invariance, provides notorious simplifications since one has to calculate onl...
متن کاملMolecular dynamics at constant temperature and pressure.
approved: enri J.F. Jansen Molecular dynamics is a technique in which the trajectories of a group of particles are calculated as a function of time by integrating the equations of motion. In this thesis we study the use of molecular dynamics for atoms in a crystal. A model is introduced which describes interactions of a physical system with an external heat reservoir in molecular dynamics simul...
متن کاملResponse Time Evaluation of Constant Temperature Circuits
The evaluation of response time of a constant temperature thermoresistive sensor based feedback circuit, excited by a pulsewidth modulated (PWM) waveform is done by a way of simulation studies in PSPICE environment and compared with that of a circuit excited by an analog voltage (continuous time domain). For a thermoresistive sensor with an intrinsic time constant much larger than the period of...
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ژورنال
عنوان ژورنال: Journal of Industrial & Engineering Chemistry
سال: 1921
ISSN: 0095-9014,1943-2968
DOI: 10.1021/ie50143a045