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气象条件对2009-2018年天津地区PM2.5质量浓度的影响
PM2.5 气象因素 后向轨迹 天津
2020/2/12
采用PM2.5质量浓度长期连续观测资料，结合地面气象资料和后向轨迹方法，分析2009-2018年天津地区PM2.5质量浓度的长期变化趋势，并探讨气象条件对其浓度变化的影响.结果表明，2013年受不利天气影响，PM2.5质量浓度达到近10 a来的峰值，其后逐年下降，2018年年均值降至52 μg·m-3，与优良天气和重污染及以上天气发生频率的年际变化趋势一致.相关性分析和主成分分析都表明相对湿度、风...
Plasma trans-fatty acid concentrations in fasting adults declined from NHANES 1999–2000 to 2009–2010
trans-fatty acids NHANES gas chromatography mass spectrometry cardiovascular disease
2018/11/13
Background: The consumption of trans fatty acids (TFAs) is associated with an increased risk of cardiovascular disease, and reducing their consumption is a major public health objective. Food intake s...
GB/T1931-2009 木材含水率测定方法
木材含水率测定方法 木材物理力学实验
2017/3/24
本标准规定了测定木材含水率的实验设备、样式、实验步骤和结果计算。本标准适用于木材物理力学实验时含水量的测定。
GB/T13942的本部分规定了在实验室条件下，木腐菌对木材的侵染而引起的木材质量损失，以评。本部分适用于在实验室条件下评定木材的天然耐腐等级。
GB/T13942的本部分适用于测定木材在野外暴露条件下抗微生物破坏或白蚁蛀蚀的性能及评定天然耐久性等级。本部分规定了木材在野外与土壤接触条件下的抗生物破坏性的测定及等级评定方法。
LY/T1857-2009软木饰面板
软木饰面板 浸渍胶膜纸饰面人造板 人造板及饰面人造板理化性能试验方法
2017/3/24
本标准规定了软木饰面板的术语和定义、要求、分类、测量和试验方法、检测规则、包装、运输和贮存等。本标准适用于用栓皮栎（Quercus.variabilis BI.）或类似树种的树皮经加工并施加胶黏剂制成的软木饰面类板材。
ALOS PALSAR OBSERVATION OF KILAUEA VOLCANO ACTIVITIES FROM 2006 TO 2009
DInSAR Ground Deformation Disaster Mitigation Kilauea Volcano Volcano Modelling
2016/3/17
Volcanic eruptions are one of the most serious of nature’s calamities, threatening both human lives and property in its immediate vicinity. The dangerous environment surrounding a volcano also causes ...
美国能源协会2009年年度报告
美国能源协会 2009年 年度报告
2015/9/6
On April 15, 2009, I was delighted to assume the Chairmanship of the United States Energy Association. All
of us are witnessing the dramatic, almost turbulent times, facing the energy industry, both...
Extremely low frequency plasma turbulence recorded by the DEMETER satellite in the ionosphere over the Abruzzi region prior to the April 6, 2009, L’Aquila earthquake
ionosphere turbulence earthquake
2015/8/24
The present study analyzes the low frequency fluctuations of the magnetic and electric fields prior to the earthquake with magnitude M.6.3 on April 6, 2009, in the Abruzzi region in Italy. This includ...
Wavelet analysis of the LF radio signals collected by the European VLF/LF network from July 2009 to April 2011
Radio Network Wavelet precursors
2015/8/24
In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these...
Providing Integrity for Satellite Navigation:Lessons Learned (Thus Far) from the Financial Collapse of 2008 – 2009
Providing Integrity Satellite Navigation Financial Collapse
2015/6/25
This paper examines the failures in risk assessment and risk management that contributed directly to the worldwide financial crisis of 2008 - 2009 and identifies lessons that are applicable to risk ma...