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The purpose of this study was to explore the relationship between grip strength and inter-muscular coordination of the forearms and hands. Twenty-four healthy young volunteers participated in the experiment. The subjects were instructed to grip hydraulic hand dynamometer with five force levels-maximal voluntary contraction (MVC), 70% MVC, 50% MVC, 30% MVC and without any contraction. Muscle activity...
Analyzed the present situation of emergency braking during train high speed movement and the merit and operational characteristic of permanent magnetic brake system were introduced. Considered the characteristic of emergency braking and service braking, the necessity of applying permanent magnetic brake and united brake control was expounded. Based on this, studied the control strategy and united...
This paper attempts to generate test cases for concurrent programs based on event graph. Through the analysis of state transition of event graph, sub-event-graphs can be generated. Each sub-event-graph corresponds to a test case. We may get benefits from this method in the following. (1) While executing the test case, we can monitor the state transition. (2) Every sub-event-graph is an execution path,...
This paper presents a method to design the shading coil in electromagnetic mechanism of AC contactor using ANSOFT Maxwell 3D. Taking CJ20-25 AC contactor as an example, the FEA model of electromagnet in AC contactor was established, and the contour of magnetic field density of electromagnet was worked out. The influence on magnetic force was also studied when the width and thickness of cross area...
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