Substrates are used in green walls and roofs to supply air water the roots of growing plants. These substrates porous with micropores which store macropores facilitate drainage entry. Effect moisture on acoustic absorption is studied for two lightweight substrates: coir dust perlite. Measurement dry moistened conducted evaluate their effective speed sound, attenuation, characteristic impedance,...

Purpose. To increase the stability of wellbore during its construction in unstable rocks. Methodology. solve set tasks, an integrated approach is used work, which includes critical analysis and generalization scientific technical achievements combination with theoretical experimental research. Findings. Factors influencing borehole walls conditions prone to rock slides falls are analyzed. Exped...

The automatic reconstruction of roofs and buildings has been an important research topic during the last years. This paper elaborates on the automatic and semi-automatic reconstruction of roofs from aerial laser scan data. Two approaches are considered in detail. First, a program has been developed, which segments laser scan data into planar patches, labels them according to their adjacency, an...

We present a technique to extract complex suburban roofs from sets of aerial images. Because we combine 2-D edge information, photometric and chromatic attributes and 3-D information, we can deal with complex houses. Neither do we assume the roofs to be at or recti-linear nor do we require parameterized building models. From only one image, 2-D edges and their corresponding attributes and relat...

The poor thermal performance of rural buildings and the severe pollution caused by coal combustion in northern China are urgent problems that need to be addressed. To solve these two issues, current status building envelopes houses commonly used heating methods households were analyzed. study found most lack insulation measures their require energy-saving renovations. improve houses, a househol...

3D city model reconstruction is one of the main application of airborne laser scanning system. Roof detection is a primary step which needs to find each roof from irregular point clouds with noise points involved. Another problem existed in roof detection is that the detected sequence of roofs will affect the size and shape of detected roofs even though a lot fancy algorithm are applied. In thi...

The word greenhouse dryer is used for a building which highly glazed with thermal conditioning desired range and it cultivating crops, plants, vegetables, etc. actual working of that the short-wave radiations falling on are absorbed by outer glazing material thereby heating interior area providing ambient heat vegetables growth respectively. heated space retained within enclosure greenhouse. Th...