The calculation model of peak pressure was obtained and the diffraction and transmission effects of explosion shock wave on concrete frustum in shallow water were analyzed.
获得了迎爆面中心反射压力峰值计算模型；分析了两个装药浅层水中爆炸冲击波对混凝土墩绕射及透射作用效应。
Although TB control programmes have averted millions of deaths, their effects on transmission and incidence rates are not yet widely detectable.
虽然TB控制规划挽救了数百万人的性命，但其对传播和发病率的影响仍未广泛展现。
Objective to investigate the transmission rules of SARS, to study the effects of corresponding prevention measures, and to provide evidence for the prevention and control.
目的探讨SARS在人群中的传播规律，研究预防措施对疾病传播的影响，为预防的控制SARS提供科学依据。
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