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介绍了自动增益控制系统(AGC)在水声信号接收机中的应用,对其工作原理、硬件电路进行了详细的论证。 相似文献
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This study focused on kindergarten children who were rated by teachers as low but rated themselves as high on cognitive competence (“overraters”), and on kindergarteners who were classified by teachers as high but rated themselves as low on cognitive competence (“underraters”). Children rated themselves and were rated by their teachers on Harter and Pike's (1984) Pictorial Scale for Young Children. Results showed that overrating and underrating in the cognitive domain were associated with similar tendencies in the physical, peer, and mother acceptance domains. Overraters were rated by teachers as lower on peer and mother acceptance than were accurate perceivers with similar teacher-rated cognitive competence. Underraters did not differ on these variables from accurate perceivers of similar teacher-rated cognitive competence. The findings are consistent with the notion that extreme overrating among kindergarteners is not a chance phenomenon, but a defensive strategy that occurs most often among children who are particularly unsuccessful in the social domains. In contrast, underrating among kindergarteners does not seem to be associated with low social acceptance. 相似文献
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Beatrice Teitel 《Early Childhood Education Journal》1985,12(4):13-15
The kindergarten class was ready. The children had learned to recite the new verse Jack Be Nimbleand were now to see it in print for the first time
Beatrice Teitel is an adjunct assistant professor at Baruch College in New York City and she lectures frequently about literacy development in young children. 相似文献
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