交通噪声监测点位的优选

在对胜利油田孤岛地区交通噪声普查的基础上 ,采用模糊聚类方法 ,优选出日常的交通噪声监测点位。经验证 ,优选出的监测点位具有很好的代表性。     

噪声防护用品的种类及性能

1噪声防护用品的种类在工矿企业，佩戴防护用品是减少噪声对听觉及人体危害的有效措施之一。在机器较多、自动化程度不高的车间，当工人必须在机器旁操作，而噪声控制措施还不能或暂时还不能实现的时候，就必须采取个人防护措施，这是一种经济而有效的方法。常用的防护用具有耳塞、防声棉、耳罩和帽盔等。1．l耳塞耳塞是插入外耳道的保护器，按其制作方法和使用材料可分成如下三类：（）预模式耳塞。它是用软塑料或软橡胶压制而成的。（2）泡沫塑料耳塞。它是用具有回弹性的特殊泡沫塑料制成。配戴前用手把它捏细，放入耳道中能自行膨胀而充…     

城市高架快速路交通噪声的环境影响及防治对策

以青岛市火车站至福州路高架快速路拟建工程为例，分析了城市高架快速路交通噪声对环境的影响，并提出交通噪声防治的对策。     

Spatial analysis of plant detritus processing in a Mediterranean river type: the case of the River Tirso Basin,Sardinia, Italy

The river continuum concept represents the most general framework addressing the spatial variation of both structure and function in river ecosystems.In the Mediterranean ecoregion,summer drought events and dams constitute the main sources of local disturbance to the structure and functioning of river ecosystems occurring in the river basin.In this study,we analysed patterns of spatial variation of detritus processing in a 7th order river of the Mediterranean ecoregion(River Tirso,Sardinia0Italy)and in three 4th order sub-basins which were exposed to different summer drought pressures.The study was carried out on phragmites australis and Alnus glutionsa leaf detritus at 31 field sites in seasonal field experiment Detritus processing rates were higher for Alnus glutionsa than for Phragmites australis plant detritus.Processing rates of Alnus glutionsa leaves varied among seasons and study sites from 0.006d^-1 to 0.189d^-1 and those of Phragmites australis leaves ranged from 0.0008d^-1 to 0.102d^-1,with the lowest values occurring at sites exposed to summer drought.Seasons and sites accounted for a significant proportion of such variability.Alder detritus decay rates generally decreased with increasing stream order,while reed detritus decay rates generallyincreased on the same spatial gradient.Summer drought events affected these spatial patterns of variation by influencing significantly the decay rates of both plant detritus.The comparisons among and within sub-basins showed strong negative influence of summer drought on detritus processing rates.Similarly,in the entire River Tirso basin decay rates were always lower at disturbed than at undisturbed sites for each stream order;decay rates of reed detritus remained lower at those sites even after the end of the disturbance events,while alder decay rates recovered rapidly from the summer drought perturbations.The different recovery of the processing rates of the two leaves could also explain the different patterns of spatial variation observed between the two leaves.     

预测飞机噪声对人体健康的影响

简述了现有机场飞机噪声主要评价量的优缺点,重点对飞机噪声对不同人群的影响作了探讨,建立了考虑飞机噪声对不同人群影响后的评价公式,同时为确定人群影响修正系数,将不同人群划分为5个年龄段，按目标层，准则层，指标层3层划分建立了不同人群影响的评价指标体系，并通过建立两两判断矩阵和引用实例统计数字计算了一个理论参考值。     

工业企业厂界噪声及建筑施工场界噪声背景值修正的探讨

提出了工业企业厂界噪声及建筑施工场界噪声测定值与背景值差值小于3dB时，噪声测定值的修正问题，介绍了相应的解决办法。     

城市区域环境噪声标准适用区域划分定量化的探讨

为使《城市区域环境噪声标准适用区域划分规范》中１－３类标准得以定量化执行，提出了Ｎ＝ｆ（Ｌ、Ｗ、Ｍ）的计算模型。该模型通过在南通市的实际套化运用，证明套化应用得出的区划标准与原区标准基本一致。且计算模型简单、直观、方便、克服了因单纯以自然状况为主的区划方法带来的弊端，有较好的实用价值。     

浅谈文化娱乐市场噪声的测量,评价与管理

通过对一家营业性质的桌球室的典型调查，对这种特殊的扰民噪声在测点的选择，评价的方法，进而对整个文化娱泺市场的噪声管理方面，笔者发表了自己的见解。     

加强建筑噪声管理改善城市环境质量

南平是闽北的政治、经济、文化的中心。近年来,随着现代工业生产、文通运输、城市建设的发展,特别是大规模的库区建设及旧城改建,环境噪声问题日益突出。加强文通及建筑噪声管理,是迫在眉睫的一项工作。