A case study was done on the construction dust emission on 7 representative points in 4 types of construction sites in Zhengzhou city.Unit area dust emission was converted by Gauss model from the dust emission intensity monitoring.This study could put forward a scientific and operable basis for the dust pollutants amount monitor.

探讨了在同温不同湿度的环境条件下,重量法中流量测定空气中悬浮颗粒物称量质量控制问题,提出了用携带全程标准控制滤膜消除湿度变化造成称量误差的措施。

随着科技的发展,无线电事业迅速发展起来,这给人们的生活带来了极大的方便,同时也使人们处于极大的复杂的电磁环境之中,电磁环境严重的影响到了人们的生活。在此背景之下,本文试图通过对电磁环境监测及其技术的初步探索,以增强人们的相关知识。

The article analysis the manufacturing process of a beer company with the method of life cycle assessment(LCA).A cleaner production executive plan is put forward based on the environmental influence caused by the inner factor of the enterprise.The plan is put into executive and benefit ecologically,economically and socially.The author also discusses the application foreground of LCA in cleaner production.