搜索结果: 91-105 共查到“知识库 环境科学技术其他学科”相关记录271条 . 查询时间(2.811 秒)
A Design Framework for End-of-Life Vehicles Recovery: Optimization of Disassembly Sequence Using Genetic Algorithms
Recovery design for disassembly optimal disassembly sequence genetic algorithm
2010/12/22
Problem statement: It is expected that over the next few years type approval legislation and public awareness will force vehicle manufacturers to identify recovery methods during the design process in...
Impacts of Typhoon on Wave Height at Bangkhuntien Shoreline
Significant wave height LINDA SWAN the Upper Gulf of Thailand Bangkhuntien shoreline
2010/12/22
Problem statement: In this study, the changing of wave height at Bangkhuntien during a passage of typhoon LINDA was simulated by using the Simulating WAves Nearshore Model (SWAN) version 40.41. The st...
城市新装修家庭TVOC 的污染现状以及影响因素分析
室内空气 TVOC 空气质量 影响因素分析
2013/8/28
以杭州市居民家庭为例, 采集调查了2007~2009 年装修1 年以内的2302 个室内空气样本(卧室、客厅和书房), 分析其TVOC 的浓度水平和变化规律. 结果显示, 新装修家庭TVOC总体平均浓度水平为0.65 ± 0.69 mg/m3, 超标率达35.8%, 近3 年TVOC浓度水平呈先大幅降低后略微提升的趋势(P < 0.05), 所监测的各类房间中TVOC 的超标率为客厅>书房>卧室....
A revised surface resistance parameterisation for estimating latent heat flux from remotely sensed data
Latent heat flux Landsat TM and ETM+ Surface resistance
2013/9/2
Estimating evapotranspiration (ET) is required for many environmental studies. Remote sensing provides the ability to spatially map latent heat flux. Many studies have developed ...
情景驱动的区域自然灾害风险分析
区域自然灾害 风险分析 情景分析 洪涝
2013/9/23
随着近年来自然灾害发生频次的增加与巨灾效应的不断涌现,人们对自然灾害风险分析提出了更高的要求与期望。然而,由于人们对"风险"认识的不全面与不系统,导致了灾害风险分析理论与技术水平的停滞不前。"风险是与某种不利事件有关的一种未来情景"是我们对"风险"的诠释。据该定义可知,风险不仅仅只是着眼于过去,更重要的是要展望未来;风险不再只是历史灾难的统计,而是未来不利事件情景的分析。因此,"情景分析"成为风险...
Estimation of evapotranspiration in an arid region by remote sensing-A case study in the middle reaches of the Heihe River Basin
Heihe RiverBasin Evapotranspiration Remote sensing Evaporative fraction
2013/9/2
Estimating surface evapotranspiration is extremely important for the study of water resources in arid regions. Data from the National Oceanic and Atmospheric Administration’s Adv...
利用气相色谱-质谱联用仪从青藏高原东部典型冰蚀湖湖泊沉积物中检测出正构烷烃系列分子化石, 将其与湖区表层土壤及牛粪中正构烷烃的分布特征进行对比, 认为冰蚀湖湖泊沉积物中C27~C33 正构烷烃主要来自流域内土壤生态系统中的高等植物, 且食草动物对高等植物的摄食消化过程并未显著改变C27~C33 正构烷烃的分布特征. 在0~44 cm 的湖泊沉积物岩芯中,陆生高等植被来源的正构烷烃相对含量从底部到顶...
最新研究表明, 2003年以来冰冻圈已成为海平面上升最主要的影响因素, 其中山地冰川和冰帽的贡献量最大. 分析中国冰冻圈融水总量的估算结果, 并粗略估计中国冰川区降水, 大致推断中国冰冻圈对海平面上升的潜在总贡献量为0.14~0.16 mm a-1, 其中主要为冰川贡献量, 约为0.12 mm a-1. 在冰川贡献中, 外流河流域冰川融水补给对海平面的贡献则仅为0.07 mm a-1, 占全球山地...
A comparison of eddy-covariance and large aperture scintillometer measurements with respect to the energy balance closure problem
A comparison eddy-covariance large aperture scintillometer measurements respect to the energy balance closure problem
2013/9/2
We analyzed the seasonal variations of energy balance components over three different surfaces: irrigated cropland (Yingke, YK), alpine meadow (A’rou, AR), and spruce forest (Guantan, GT). The energy ...
氯化铝和聚合氯化铝(PAC)在黄河水中的混凝效果与残留铝含量及组分
混凝效果 残留铝 组分 黄河水
2013/8/27
研究了初始pH和投加量对AlCl3和聚合氯化铝(PAC)在黄河水混凝过程中混凝效果的影响, 并对出水中的残留铝进行了分离试验. 结果表明, PAC 对黄河水混凝效果更好, 且在碱性条件下对初始pH 改变较少. 在投加量为15 mg/L、溶液初始pH 为6.0 时, AlCl3 和PAC 对黄河水中浊度、UV254 和溶解性有机碳(DOC)去除率较高. 2 种混凝剂在黄河水处理中最佳投加量是15 m...
环境减灾卫星雪灾监测评估应用研究
环境减灾卫星 雪灾监测评估 应用研究
2013/9/25
环境减灾A、B星是我国首次发射的专门用于灾害监测与评估业务的两颗光学小卫星。作为环境减灾小卫星星座建设的重要组成,A、B星的发射标志着环境减灾小卫星星座组网的正式开始,也标志着我国灾害遥感监测评估有了稳定数据源。环境减灾小卫星星座A、B星分别搭载了多光谱成像仪、红外相机和超广谱成像仪,最大观测幅宽达到700km,最快重返周期小于48h。环境减灾小卫星星座具备宽视场覆盖、高重访频率、多谱段观测的特点...
The Application of Simulating WAves Nearshore Model for Wave Height Simulation at Bangkhuntien Shoreline
Significant wave height SWAN the Upper Gulf of Thailand Bangkhuntien shoreline
2010/12/22
Problem statement: In this study, the significant wave height at the Upper Gulf of Thailand
and the change of wave height at Bangkhuntien shoreline were simulated by using the Simulating
WAves Nears...
Differential Gene Expression in Zebrafish (Danio rerio) Following Exposure to Gaseous Diffusion Plant Effluent and Effluent Receiving Stream Water
Zebrafish gene expression metals ethoxyresorufin-o-deethylase
2010/12/22
Transcription of the biomarker enzyme cytochrome P4501A1 (CYP1A1) was significantly elevated in fish exposed to one plant effluent at both the 7 (16 fold) and 14 (10 fold) day time points. Sediment PC...
A Two-Dimensional Wave Prediction Model Along the Best Track of Typhoon Linda 1997
Wave prediction best track Typhoon Linda wave characteristics spectral energy balance equation
2010/12/22
The model results were predicted at five stations which were before and during the typhoon entering into the GoT. The wind speeds of the stations 1-5 were in ranges of 5.14-29.81, 4.11-28.27, 0.51-24....
Residential Exposure of Environment Toxic Substance Outcome during Menstrual Cycle
Menstrual cycle estrogen toxic chemicals fertility problems
2010/12/22
Our results indicated that the salivary hormones like estrogen and its conjugate indicates decrease in ovulatory and postovulatory phase. Further, the environmental toxic materials can also cause prob...