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铁锋区噪声污染现状浅析
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作者 陈晶 徐琦 韩忠军 《黑龙江环境通报》 2010年第4期55-57,共3页
铁锋区经济的迅速发展,推动了辖区的机械加工业、餐饮业、建筑业的迅猛发展,随之而来的噪声污染环境问题有上升的趋势。本文结合铁锋区的实际情况,对辖区噪声现状进行分析,然后提出了具体的解决办法。
关键词 机械加工业 餐饮业 建筑业 噪声环境问题 分析 比较
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An effective description of a periodic one-dimensional hopping model
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作者 ZHANG YunXin 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第3期401-405,共5页
The periodic one-dimensional hopping model is useful for studying the motion of microscopic particles in the thermal noise environment. Based on the explicit formulations of mean velocity, mean first passage time and ... The periodic one-dimensional hopping model is useful for studying the motion of microscopic particles in the thermal noise environment. Based on the explicit formulations of mean velocity, mean first passage time and effective diffusion constant, a general N internal states or even infinite internal states model can be approximated by a one state model that retains the basic properties of the original process. This effective description aids the analysis of biochemical and biophysical problems. This effective description also implies that, to some extent, many processes can be well described by simple two-state models, or even one-state models. 展开更多
关键词 hopping model mean velocity mean first passage time effective diffusion constant
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