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The winners of this year’s MADMEC competition identified a class of materials that could offer a more efficient way to keep greenhouses cool. After Covid-19 put the materials science competition on p...
It’s well known that the production of cement — the world’s leading construction material — is a major source of greenhouse gas emissions, accounting for about 8 percent of all such releases. If cemen...
Hurricanes occur without any control of human-being, and it causes large scale loss of life and properties. They happen in the very short timeline and cannot be stopped by the people after it starts t...
Hurricanes occur without any control of human-being, and it causes large scale loss of life and properties. They happen in the very short timeline and cannot be stopped by the people after it starts t...
The studies and development of coal seam gas (CSG) have been conducted for more than 30 years in China, but few of China’s CSG projects have achieved large-scale commercial success; faced with the boo...
Pixel-based classification method is widely used with the purpose of detecting land use and land cover with remote sensing technology. Recently, object-based classification methods have begun to be us...
The threat of climate change has inspired efforts to increase the share of energy produced from renewable sources such as wind, solar, and biomass. When fossil fuel is replaced by renewable energy...
Boston’s leaky pipes add to greenhouse-gas buildup(图)     Boston’s leaky pipes  greenhouse-gas       font style='font-size:12px;'> 2015/3/4
Imagine if every time you filled your car with gas, a few gallons didn’t make it into the tank and instead spilled onto the ground. That’s essentially what happens every day along the aging system of ...
Greenhouse gas data were utilized as proxy data in interpreting climate variability. These greenhouse gases were related to temperature records using standard deviation (SD) as the transfer function b...
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...
High variability due to soil heterogeneity and climatic conditions challenge measurement of greenhouse gas (GHG) emissions as influenced by management practices in the field. To reduce this variabilit...
The biodrying process was studied as an alternative technology to reduce the mass and volume of horticultural waste. Four static piles were prepared inside a greenhouse: two containing whole waste and...
With the increasingly severe global warming, investments in clean technology, reforestation and political action have been studied to reduce CO2 emission. In this study, a nonlinear stochastic model i...
针对现有温室环境控制系统无法对下一时段温室温度进行精确预测的问题,提出采用时序分析法建立温度预测模型的方法。以圆拱型连栋薄膜温室2001年6月6日~2002年9月16日间的温度为例,首先对温度序列进行一阶年度差分处理来实现序列的平稳化;然后根据一阶年度差分序列自相关系数和偏相关系数的特点,提出采用ARMA(p,q)模型来拟合温室温度;最后根据方差估计和误差平方和最小的原则,确定了一个ARMA(4,...
为了解决当前温室监测系统存在的布线复杂、节点功耗大、部署不灵活、管理不便等问题,设计了一种基于无线传感器网络的温室环境信息监测系统。以CC2430为核心开发无线传感器节点,完成温室环境因子实时监测;采用ZigBee技术实现无线传感器网络自组网和监测数据自动汇聚;基于ARM9微处理器S3C2410A和WinCE5.0构建网关节点,采用嵌入式数据库管理模式实现了传感器节点管理、环境数据管理和预警等功能...

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