To investigate the influence of orientational degrees of freedom onto the dynamics of molecular systems in its supercooled and glassy regime we have solved numerically the mode-coupling equations for hard ellipsoids of revolution. For a wide range of volume fractions φ and aspect ratios x0 we find an orientational peak in the center of mass spectra χ ′′ 000(q, ω) and φ ′′ 000(q, ω) about one de...

We propose a simple method for measuring the mode power of two-mode fiber based on the bending method. The mode power ratio is determined with better than 1 dB accuracy by undertaking three power measurements with different numbers of fiber bends. We also evaluate the estimation error of the proposed method and the required resolution of the measurement.

We propose a theoretical model to describe external-cavity distributed feedback semiconductor lasers and investigate the impact of number external points on linewidth side-mode suppression ratio through numerical simulation. The simulation results demonstrate that can be reduced by increasing cavity length ratio, adding more further narrow enhance side mode ratio. This research provides insight...

We utilized molecular statics (MS) simulations to investigate the auxeticity of single layer black phosphorus (SLBP). Our simulation results show that the SLBP has a negative in-plane Poisson’s ratio in the zigzag direction when the applied strain along the armchair direction exceeds 0.018. We show that the interplay between bond stretching and bond rotating modes determines the in-plane Poisso...

investigating downstream changes in bed load shape can be useful to detect watershedhydrological processes and it is very important to design hydraulic structures and to managecapacity of large storage dams, properly. regarding to doing of enforcement studies, thisresearch was conducted in qalesar river in upstream of chahardangeh watershed in mazandaranprovince. after recognition of the study ...

in spark ignition (si) engines, the accurate control of air fuel ratio (afr) in the stoichiometric value is required to reduce emission and fuel consumption. the wide operating range, the inherent nonlinearities and the modeling uncertainties of the engine system are the main difficulties arising in the design of afr controller. in this paper, an optimization-based nonlinear control law is anal...