搜索结果: 1-15 共查到“环境科学技术 their effect”相关记录44条 . 查询时间(0.25 秒)
Evaluation of Disturbance Factors and Their Effect on Breeding Common Loons at Lake Umbagog National Wildlife Refuge, New Hampshire and Maine
Disturbance Gavia Immer Loon Recreation Umbagog
2014/12/9
Virtually any person exposed to American movies or television has likely heard the call of a common loon (Gavia immer). Its use as a sound prop has become ubiquitous in any scene related to the outdoo...
The Effect of Leaves and Steel Support Cables on The Dynamic Properties of Northern Red Oak (Quercus rubra) with Co-Dominant Trunks
Trees Dynamics Co-Dominant
2014/11/26
Natural frequency and damping ratio were measured for ten forest grown northern red oak trees with co-dominant trunks. Steels support cables were installed in the canopies of five of the sample trees ...
Torsional Shear Strength and Size Effect in Structural Composite Lumber
Universal-type Test Machine Finite Element Analysis
2014/11/26
The natural variation of strength properties within brittle materials leads to size effect, a well-known phenomenon whereby the mean strength of a material is observed to decrease as the stressed volu...
Quantifying the Effect of Passive Solar Design in Traditional New England Architecture
New England Architecture Passive Design
2014/11/26
Passive solar design can be an effective means of reducing conditioning loads in residential buildings by utilizing free solar heat during the heating season, and blocking unwanted solar heat during t...
Effect of moisture content on some engineering properties of mahogany (Khaya senegalensis) seed and kernel
Khaya senegalensis physical properties frictional properties thermal properties specific heat Nigeria
2014/9/22
Some engineering properties of mahogany seed and kernel were investigated and expressed as a function of moisture content. In the moisture ranges of 7.1–32% and 5.3–22% (d.b.), respectively, the seed ...
The Effect of System Stochastic Noise on SINS Initial Alignment
捷联惯导系统 多位置对准 单轴旋转 卡尔曼滤波 系统随机噪声
2014/4/17
捷联惯导系统初始对准系统状态方程所描述的状态统计信息，受系统随机噪声驱动，系统随机噪声通过噪声驱动阵作用于状态。常用系统状态方程的系统噪声驱动阵为单位阵。经过分析发现系统噪声驱动阵为单位阵是有条件的；通过推导给出了系统状态方程可以简化此种形式的条件；指出了在水平陀螺、加速度计随机噪声水平不同时，若使用简化系统模型会引起状态估计误差；并通过单轴旋转多位置对准仿真实验进行了验证。仿真结果表明：若水平陀...
Effect of Different Nitrogen Fertilizer Types and Application Measures on Temporal and Spatial Variation of Soil Nitrate-Nitrogen at Cucumber Field
Solar Greenhouse Cucumber Nitrate-Nitrogen Nitrogen Retention
2013/3/8
Nitrate-nitrogen content of groundwater are ever-increasing in underneath vegetable growing areas, in this paper, based on field test of cucumber cultivated in Solar Greenhouse in North China, we stud...
The Effect of Catena Position on Greenhouse Gas Emissions from Dambo Located Termite (Odontotermes transvaalensis) Mounds from Central Zimbabwe
Greenhouse Gas Emissions Termites Mounds
2013/2/27
Methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2)O) are greenhouse gases (GHGs) which cause global warming. Natural sources of GHGs include wetlands and termites. Previous studies have quanti...
Study of the Effect of Himreen Dam on the Phytoplankton Diversity in Dyala River, Iraq
Himreen Dam Impoundment Phytoplankton Species Richness Similarity Index
2013/3/11
In present study three stations are located on Diyala River has been investigated to study phytoplankton community, the first station was located in jalawlaa area, second station in Himreen impoundmen...
Coliform Bacteria: The Effect of Sediments on Decay Rates and on Required Detention Times in Stormwater BMPs
Fecal Indicator Bacteria Decay Rate Sediment Nutrients Organic Carbon Best Management Practices (BMPs)
2013/3/11
Fecal indicator bacteria, such as total coliforms and E. coli, are a challenge to control in urban and rural stormwater runoff. To assess the challenges of improving bacterial water quality standards ...
Measurement of Cooling Effect of Building Environment Greening
Wall Greening District Greening Trees Shading Cooling Effect
2013/3/11
A series of measurements showed that community greening and trees shading had different degree of cooling effect. The cooling effect of wall greening was related to factors such as heat storage capaci...
Effect of Aerosols on Visibility and Radiation in Spring 2009 in Tianjin, China
Aerosol Visibility Extinction coefficient Refractive index Radiation fluxes
2016/3/28
Meteorological and aerosol data were measured at the atmospheric boundary layer observation station in Tianjin, China,
and were analyzed to study the effects of aerosol mass, composition, and size di...
Effect of Temperature and CaO Addition on the Removal of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Fly Ash from a Medical Waste Incinerator
PCDD/Fs Fly ash Thermal treatment Calcium oxide
2016/3/28
The effects of thermal treatment temperature and CaO addition on polychlorinated dibenzo-p-dioxins and dibenzofurans
(PCDD/Fs) content in the fly ashes from a medical waste incinerator with high chlo...
Analyses of the Ozone Weekend Effect in Tokyo, Japan: Regime of Oxidant (O3 + NO2) Production
Ozone weekend effect Ozone production regime Nitrogen oxides Non-methane hydrocarbons
2016/3/28
The ozone weekend effect (OWE) in Tokyo, the capital of Japan, was analyzed from April 2005 to March 2008 with respect
to the photochemical ozone production, focusing on the ozone production regime. ...
Does Exposure to Nitrate in Drinking Water Contribute Anything the Effect of Water Chlorination on Children Methemoglobin Levels?
Methemoglobin Drinking Water Nitrate Chlorine Children
2013/3/11
Previous studies showed contradictory findings regarding the relationship between nitrate in drinking well-water and abnormal methemoglobin (MetHb) level (>2%) among children. We studied the effect of...