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总结了环境噪声人工监测方法的缺陷,然后从城市环境噪声数据的性质、噪声自动监测系统的物理构成、噪声监测子站的布设、噪声自动监测有效时间的确定这几个方面对噪声自动监测系统进行了相关问题的论述. 相似文献
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针对现有噪声监测系统的理论研究较多,没有成熟产品的问题,本文设计了基于LabVIEW软件的环境噪声自动监测系统。利用电声性能较好的驻极体噪声传感器对噪声信号进行采集,LabVIEW软件将噪声数据采集到上位机,并对原始信号进行分析、处理,再通过无线传输模块将分析好的噪声值发送到噪声监测终端,实现了噪声的自动管理及监测。本系统具有测量精度高、稳定性好、环境适应性强等特点。 相似文献
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《中国环境管理干部学院学报》2018,(2)
正三部门明确环保税征收有关问题生态环境部、财政部、国家税务总局近日联合发出通知,对应税大气污染物和水污染物排放量的监测计算、应税水污染物污染当量数的计算、应税固体废物排放量计算和纳税申报以及应税噪声应纳税额的计算等问题予以明确。 相似文献
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环境噪声监测是环境要素监测中的重要组成部分,是获取描写声环境质量特征参量的主要技术手段。是向监督检查噪声污染情况、各种环境法规、标准的实施和正确评价声环境质量提供科学依据的基础。噪声监测工作与其它环境监测要素相比,有其与众不同的个性,即环境噪声是非稳态噪声,噪声峰值起伏性较大,声环境辅助因子多等。因此,若获取科学的,严谨的噪声监测数据,必须加强噪声监测工作的管理。 相似文献
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以秦皇岛市2001-2010年的噪声监测资料为依据,通过对环境噪声变化趋势的分析,发现秦皇岛市环境噪声源主要为社会生活噪声、交通噪声、工业噪声,并提出了相关防治对策。 相似文献
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油页岩干馏炼油环境风险评价研究 总被引:1,自引:1,他引:0
以某油页岩干馏炼油项目为实例,进行了环境空气的定量环境风险评价,包括环境风险识别、源项分析、后果计算、风险计算和评价、风险管理等主要内容,提出了环境风险评价的重点,指出了环境风险评价与安全评价各自的侧重点,对后果计算的应用和物质风险识别采用的标准等方面提出了相应意见。 相似文献
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基于模糊综合评判法评价地下水环境质量的探讨——以新疆某市为例 总被引:1,自引:0,他引:1
模糊综合评判法是以模糊数学为基础,应用模糊关系合成的原理,将一些边界不清,不易定量的因素定量化,进行综合评价的一种方法。从其原理分析,在地下水环境质量评价方面可能取得更准确的结果。首先介绍了模糊综合评判法的计算步骤,然后以新疆某市2008年第4季度2个水质监测采样点的监测资料为依据,选择5种污染物为评价因子,运用模糊综合评判法进行运算,得出综合评价结果。评价结果表明,运用模糊综合评判法评价地下水质量是合理的,其评价结果能全面反映水质的综合状况。 相似文献
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This paper describes a multistage algorithm for efficient calculation of magnetic flux contours, for optimizing the design
of structural magnetic shielding. It is part II of the article presented in Pekar and Netzer (2006). The Environmentalist. The multi-stage algorithm enables albeit medium-power computer system to calculate the effect of shielding materials with
a given geometry, in a reasonable timeframe without compromising precision. The outcome results are a large number of electrical
utility models and the best cost-effective shielding materials and geometries for ELF magnetic flux reduction per Authority
regulations and requirements. This article reviews methods and principles for calculation of an extremely low frequency (50/60 Hz)
electromagnetic field originating from power utilities and power lines, for the purpose of constructing efficient magnetic
shielding. The paper points out difficulties in existing methods and proposes a new algorithm for analysis and construction
of magnetic shielding. 相似文献
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Bessel D. van't Woudt Kelvin Nicolle 《Journal of the American Water Resources Association》1981,17(5):820-824
Procedures have been developed (a) to inject a tracer at a constant rate below the water surface at selected points across a stream and (b) to deal with suspended sediment. Mixing remained far from complete in relatively long channels, owing to channel and flow divergence with uncertainty where to sample downstream and which marginal sample values to include for flow calculation. These problems are encountered when mixing is largely dependent on transverse diffusion. Accurate and replicable results were obtained where dye was injected upstream and detected downstream from riffles that induced thorough turbulent mixing. Dye gaging should be practical in gorges or wherever flow is turbulent across the whole width of a channel. 相似文献
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W. M. Snyder 《Journal of the American Water Resources Association》1980,16(1):22-30
ABSTRACT: Sliding polynomials differ from other piecewise interpolation and smoothing methods in their functional continuity at the nodes. This functional continuity was used to establish optional spacing of nodes and optional boundary controls in data smoothing while still maintaining mathematically continuous rates or gradients. Cyclic as well as noncyclic data can be smoothed. Variance of the individual nodal values. derived through least-squares optimization, can be calculated using the rigorously determined weighting coefficients between data points and nodes. Such nodal variances are estimates of localized uncertainty in the data which complement the localization of smoothing through use of piecewise functions. Choice of controls in smoothing and calculation of variance have been incorporated in a computer program for user convenience. 相似文献