The object of research is the amplitude-frequency characteristic sound insulation multi-layer heterogeneous structures. One most problematic places calculation methodology, due to existence standards such as ISO, DBN, which have some differences between them, and software, methodology not fully known, copyright latter. Using modeling method in INSUL software complex, characteristics partition w...

The environmental pollution problem of Sinochem Chongqing Fuling Chemical Co., Ltd. is serious. District Party committee and government relocated the chemical plant as a whole started ecological restoration project. However, investigation found that soil covering greening failed to fundamentally eliminate harm caused by phosphorus slag environment. Therefore, resource utilization imperative. ap...

Oil-impregnated paper is widely used in power transmission equipment as a reliable insulation. However, copper sulphide deposition on oil-paper insulation can lead to insulation failures in power transformers. This paper presents the influences of copper sulfur corrosion and copper sulphide deposition on copper wires and oil-paper insulation in power transformers. Thermal aging tests of paper-w...

Moisture inside the footwear can considerably affect the thermal insulation. In this study with a thermal foot model there was simulated three sweat rates (3, 5 and 10 g/h). Five types of footwear with various insulation levels (dry insulation from 0.19 to 0.50 m2 · K/W) were tested. The footwear insulation reduction was calculated for 1.5 hour period. The reduction in insulation was related to...

From the perspective of technical suitability, this paper comparatively analyzed economical thickness and suitable exterior wall thermal insulation material with highest energy saving rate building envelop, attained relationship, curves, model material. The purpose is to provide useful evidences for residential buildings optimization design wall, so that architectural designers could be inspire...