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我们于1982年8~9月,在有关人员协助下,对东、西、南三面紧邻铁道线的郑州铁路苗圃地区进行了列车运行噪声对环境污染现状的调查。目的了解噪声污染程度,选一远离铁道线、环境较为安静的劳动路家属区作对照。以便针对存在问题,采取必要措施,并为今后铁道干线的改建,城市建设规划、以及为降噪措施提供参考数据。 相似文献
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1984年5月某日上午10点30分钟左右,铁路某货场在分装一罐车液体二氧化硫时,导管破漏,造成二氧化硫外溢,使周围环境受到严重污染。为防止类似事件的发生,现将调查资料报道如下。一、事故经过 相似文献
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An important task of Internet congestion control is inhibiting sporadic data flow to maintain a suitable window size or route
queue length. Such a requirement is just consistent with the basic idea and function of a moving average filter. In this paper
one prior Internet congestion control model, named transmission control protocol (TCP)/random early detection (RED) stroboscopic
model, is studied, and then one new scheme is proposed to enlarge its stable domain, where a simple moving average filter
is introduced to inhibit sporadic data flow as possible. In the novel scheme the bifurcation phenomenon is postponed without
any extra controller. The effectiveness of the new scheme is verified by theoretical analyses and numerical simulations. 相似文献
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