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本文通过理论推导与实际考察认为当用热器片数或长度超过一定值后,上进下出,异侧连接的散热效果要优于上进下出目侧连接. 相似文献
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INTRODUCTION Most underwater acoustic signals received by sonar are corrupted inevitably by unpredictable noise sources. In most cases, sonar system is adversely influenced by noise so disturbing that target signals cannot be detected and classified correctly so that pre-processing is necessary to reduce the noise as much as possible. Methods of noise reduction based on wavelet transform have been developed extensively in pre-vious literatures (Xu et al., 1994; Sun, 1998), and include wav… 相似文献
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数学是推动科学发展和时代更新迭代的巨大力量,也是发展科技的基础学科。奠定扎实的数学教育教学基础,对培养优秀的科技人才有实质性的意义。创新数学教学方式,改变数学教学模式,以拓展式教学为出发点,在丰富的实践活动中锻炼学生的数学应用能力和思维能力,进而构建拓展型课程,是本文主要探讨的内容。 相似文献
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