We present imaging Fabry-Perot observations of Hα emission in the nearly edge-on spiral galaxy NGC 5775. We have derived a rotation curve and a radial density profile along the major axis by examining position-velocity (PV) diagrams from the Fabry-Perot data cube as well as a CO 2–1 data cube from the literature. PV diagrams constructed parallel to the major axis are used to examine changes in ...

This paper introduces a step response based method to predict the eye diagram for high-speed signaling systems. The method is able to predict accurately the worst-case eye diagram, and is orders of magnitude faster than the method using SPICE simulation with input of random bits. The proposed method is applied to search optimal equalizer parameters for lower-power transmission-line signaling sc...

This paper uses the flux-MMF diagram to compare and contrast the torque production mechanism in seven common types of electric motor. The flux-mmf diagram is a generaked version of the flux-linkage versus current (+i) diagram €or switched-reluctance motors. It is illustrated €or switchedreluctance, synchronous-reluctance, induction, brushless ac, brushless dc, interior PM and dc commutator moto...

Phase-locked technology in motor speed control system has a wide range of applications. Especially for high accuracy in the motor steady speed operation situation, more and more use of phaselocked servo control system. This paper describes the block diagram and mathematical model of phaselocked control system, Shows the circuit parameter calculation method. This and combined with design example...

In this paper we present an intuitive explanation for the non-uniqueness of the traveling wave speed in the Fisher equation, showing a similar non-uniqueness property in the case of inviscid traveling waves. More precisely, we prove that traveling waves of the Fisher equation with wave speed c > 0 converges to the inviscid traveling wave with speed c > 0 as the diffusion vanishes. A complete di...

INTRODUCTION The analytical stability lobe diagram offers a predictive capability for selecting stable chip width-spindle speed combinations in machining operations [1-4]. However, the increase in allowable chip width provided at spindle speeds near integer fractions of the system’s dominant natural frequency is diminished substantially at low spindle speeds where the stability lobes are closel...

Determination of the starter torque-speed diagram is a major task in the design or selection of a proper gas turbine starter. In this paper, the maximum power of the MGT-40 gas turbine starter was calculated based on the dynamics of the rotor, start-up logic, and compressor map. In a recent research, the pressure ratio was assumed as a linear function of the rotor speed and the required sta...

The LWR model is of interest since it is simple and can successfully reproduce some essential features of traffic flow, such as the formation and propagation of traffic disturbances. In this paper, we investigate the LWR model from an uncertainty perspective. We attempt to analyze how reliable the LWR model prediction will be if the fundamental diagram (FD) in use is not accurately specified. T...

Abstract The rapid solidification of a binary mixture in the region interface velocities V close to diffusion speed bulk liquid phase D is considered within framework local nonequilibrium approach. In this high-speed derivation analytical expression for “temperature-velocity” response function representing kinetic diagram given without using concept equilibrium diagram. modes movement both and ...