Tsunehiko Nakanishi

The Field Effect Mobility and the Current-Voltage Characteristics of Amorphous-Silicon Thin-Film Transistors

The current-voltage characteristics of a hydrogenated amorphous silicon thin-film transistor were investigated. The computed equation for the current-voltage characteristics that incorporated gate-voltage-dependent field effect mobility and drain-voltage-dependent effective gate length was in excellent agreement with the experimental data.

MEASUREMENT OF ROAD TRAFFIC USING SPATIAL FREQUENCY ANALYSIS OF TV IMAGES

This paper deals with distinguishing vehicle types in automobile traffic flow by image processing. In the traffic flow, traffic jams always occur. Traffic jams increase driver stress and result in time delays, traffic accidents, air pollution. Thus, it is important to provide traffic information such as vehicle volume and to distinguish vehicle types. In this paper, we attempt to do so by using vehicle width.

Minimization of measurement points on automobile traffic flow

Abstract The acquisition of information on the relation between flow speed and jam conditions of automobile traffic flow on express ways is necessary to achieve appropriate traffic flow. It is very difficult to use a large number of measuring points on a road, so in practice a grasp of the situation is achieved by measuring the flow conditions at a small number of measuring points. This paper deals with the application of a graphical interpolation method to the minimized number of measuring points in order to estimate the spatial density field of flow concentration. The traffic flow is expressed as a compressive flow, and this model is analyzed by a nonlinear equation. The results are given by the combination of characteristic lines and the propagation of a shock wave.