spontaneous decay

The effect of temperature on natural attenuation and bio-augmented degradation of nitrobenzene-contaminated sediments;

温度对底泥中硝基苯的自然衰减及强化降解的影响

The applications of new methods,materials and techniques were summarized,such as oxidation,air-stripping,absorption,biodegradation and natural attenuation etc.

主要介绍了含MTBE废水处理的工艺进展以及一些新方法、技术在实验以及生产实践中的应用 ,如氧化、气提、吸收、降解和自然衰减等 ,同时对各种方法的优缺点进行了评述 ,对未来的工艺进步做了展

Natural attenuation of contaminant in ground water is an essential area of solution to ground water pollution and the basic research of remedial approach.

污染物在地下水中的自然衰减是目前解决地下水污染问题的一个重要的研究领域 ,是地下水污染生物修复的基础课题。

A micro-cantilever and a micro-membrane, which are both attached with piezoelectric devices, are excited respectively by the ramp pulse signal and produce free damping motion.

附有压电驱动的微悬臂梁和微振动薄膜在斜波脉冲激励信号作用下产生自由衰减振动,通过激光多普勒测振仪将瞬态运动速度转换为模拟信号,经数据采集卡数字化后送入计算机,对其振动特性进行分析。

Research on Nature Attenuation of Nitrobenzene and Organochlorine Pesticides in Nature Waters;

硝基苯和有机氯农药在天然水环境中自然衰减的模拟研究

Analyses the characteristics of transmission, natural attenuation, regeneration and superposition of noise.

分析了空调系统噪声的传递、自然衰减、再生和叠加特性。

Study on the Change of Redox Environment in the Aquifer Polluted by BTEX and Enhanced Natural Attenuation

BTEX污染含水层中氧化还原环境的变化及强化自然衰减研究

Study on the Natural Attenuation of Landfill Leachate Pollutants in the Underground Environment and Enhanced Remediation Technology of Polluted Arquifer;

垃圾渗滤液污染物在地下环境中的自然衰减及含水层污染强化修复方法研究

free damping oscillation vibrometer

自由衰减振荡示振仪

Study on environmental fates of polynuclear aromatic hydrocarbons in contaminated coastal sediment

沉积物中多环芳烃在海岸带水域自然环境中的衰减研究

Natural Desorption Rate and Attenuation Coefficient of Coal Seam Gas and its Significance

煤层瓦斯初始自然解吸速率和衰减系数及其意义

When profit diminishes, merchants are very apt to complain that trade decays; though the diminution of profit is the natural effect of its prosperity.

当利润减少时，商人们往往都埋怨说，商业衰退了，可是利润减少乃是商业繁盛的自然结果。

Yet some form of attenuation is mandatory.

然而有些衰减形式是必须采用的。

Free Damping Test Method for Vibration Characteristics of Microstructures;

微结构振动特性的自由衰减测试方法

Degenerative Transfer (DT) Polymerization of Vinyl Acetate;

衰减链转移自由基（DT）聚合醋酸乙烯酯

Analysis of FID Signal in Pulse NMR Experiment;

脉冲核磁共振实验自由衰减信号分析

High amplitude noise attenuation based on Gabor transform

基于Gabor变换自适应噪声衰减

Local characteristics in converging-diverging tube with delaying self-sustaining swirl flow

缩放管内带衰减性自旋流的局部性能

Automatic Testing System of Attenuator Based on Visual Basic 6.0

基于Visual Basic 6.0的衰减器自动校准系统

Automatic Calibration of Large Attenuation Based on Visual Basic 6.0

基于Visual Basic 6.0的大衰减量的自动校准

attenuation compensator

衰减均衡器衰减补偿器

Inter-American Conference on Natural Disaster Reduction

美洲减少自然灾害会议