以下为句子列表：
英文: Considering a signal project on Shanghai urban rail transit line 8, the paper studied and presented the theoretical RF signal transmission model of the R-CBTC data communication system in tunnels, and studied the transmission characteristics of the wirele
中文: 摘要结合上海市城市轨道交通8号线的信号工程，研究并提出隧道中无线CBTC教据通信系统的无线射频信号理论传播模型；从理论模型和实地无线勘测的角度，对无线信号在隧道中的传播特性进行研究及分析。
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英文: Considering the nonuniqueness and instability of ultrasonic computerized tomography for structural concrete as well as the ultrasonic transmission characteristics in concrete, a natural weight matrix with dear physical meaning was introduced in the invers
中文: 摘要针对混凝土超声波层析成像结果不唯一和稳定性差的问题，首先依据超声波在混凝土中的传播特点，在反演算法中引入物理意义明确的自然权矩阵，对走时较小的射线和射线较密的成像单元加以重权。
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英文: Proportional valves can call the rapid and flexible, and other advantages such as large hydraulic power transmission characteristics together.
中文: 比例阀能把电的快速灵活等优点与液压传动功率大等特点结合起来。
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英文: This paper try to obtain various noise-control measures applied to different situations through analyzing noise transmission characteristics of heat pump units under natural conditions of ventilation and cooling, in practice, The noise pollution of the ho
中文: 通过分析风冷式热泵机组的噪声源特性，在满足热泵正常运行所需要的通风散热等条件下，总结出多种应用于不同情况下的噪声治理措施，并经实践检验，降噪效果显著。
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英文: THE TRANSMISSION CHARACTERISTICS OF EXPLOSIVE BLAST IN BIOLOGICAL TISSUE
中文: 爆炸冲击波在生物体内的传播特征
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