The discovery of giant magneto-impedance(GMI) in soft magnetic materials has opened new horizon in the development of micro-magnetic sensors operating at nano-Tesla range. A new type of asymmetric giant magneto im...
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ISBN:
(纸本)9781424438631;9781424438624
The discovery of giant magneto-impedance(GMI) in soft magnetic materials has opened new horizon in the development of micro-magnetic sensors operating at nano-Tesla range. A new type of asymmetric giant magneto impedance (A -GMI)sensor was developed and the performance of the sensowas carefully studied. This paper presents a design of linear magnetic sensor based on AGMI in Co(68.15) Fe(4.35)Si(12.5)B (15) wire s-subjected to a high frequency pulse current, which demonstrates a considerable asymmetry and enhanced sensitivity. Su-sequent, a novel approach, adopting rotary ellipsoid witharray of magnetic dipole, is used for the modeling of the field distribution of the battlefield ferromagnetic target, especially for tank. On account of amorphous wire's characteristics, th-e research of the paper provides a promising and effective w-ay to improve the performance for detecting and recognizingthe target and makes it possible for the microminiaturization of the micro-magnetic fuze system.
Empirical mode decomposition (EMD) can adaptively separate the intrinsic oscillatory modes of signals into a finite number of intrinsic mode functions (IMFs). IMFs will lose their physical meaning when mode mixing phe...
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ISBN:
(纸本)9781424463251;9780769539911
Empirical mode decomposition (EMD) can adaptively separate the intrinsic oscillatory modes of signals into a finite number of intrinsic mode functions (IMFs). IMFs will lose their physical meaning when mode mixing phenomenon occurs. In this paper, we first analyze the relationship between mode mixing and intermittency in signals. We then introduce a new type of mode mixing which is not caused by intermittency in signals. Finally, we argue that the time-varying extrema sampling rate is the essential reason of mode mixing.
It is not easy to processing piston ring contour because of its complicating shape. From view of time-domain analysis, in order to trace the curve of piston ring, servo actuator must have high speed and acceleration t...
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ISBN:
(纸本)9781848002401
It is not easy to processing piston ring contour because of its complicating shape. From view of time-domain analysis, in order to trace the curve of piston ring, servo actuator must have high speed and acceleration to complete movement of back and forth. From view of frequency -domain analysis, the order of harmonic of the piston ring contour is very high, so the control system bandwidth also should be wide enough. It's hard to satisfy these requirements for the traditional drive methods by using rotate serve and Lead screw. In this paper, a new method of direct drive by linear motor is provided, And achieve good results.
Investigation on illusory contours is important for understanding the mechanisms un- derlying the object recognition of human visual system. Numerous researches have shown that illusory contours formed in motion and s...
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Investigation on illusory contours is important for understanding the mechanisms un- derlying the object recognition of human visual system. Numerous researches have shown that illusory contours formed in motion and stereopsis are generated by the unmatched features. Here we conduct three psychophysical experiments to test if Kanizsa illusory contours are also caused by unmatched information. Different types of motion (including horizontal translation, radial ex- panding and shrinking) are utilized in the experiments. The results show that no matter under what kind of motion, when figures or background move separately illusory contours are perceived stronger, and there is no significant difference between the perceived strength in these two types of motion. However, no such enhancement of perceived strength is found when figures and background move together. It is found that the strengthened unmatched features generate the enhancement effect of illusory contour perception in motion. Thus the results suggest that the process of unmatched information in visual system is a critical step in the formation of illusory contours.
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