南京市通讯辐射环境调查

通过对南京市区进行网格式布点监测,并重点监测典型区域和典型基站,采用基于MapInfo构建的电磁辐射环境评价系统进行现状评价。结果表明,南京市电磁辐射水平总体较低,处于安全水平,部分电磁辐射水平相对较高的区域主要受电视发射塔和广播电台的影响,是南京市电磁辐射环境保护和移动通信基站建设应关注的重点。     

泉州市移动通信基站电磁辐射环境影响分析

对泉州市移动通信GSM基站和TD—SCDMA基站电磁辐射状况进行监测与分析。通过理论计算预测基站电磁辐射安全距离,对典型敏感目标、典型基站进行电磁辐射的监测,结果与理论预测情况相符。选取302个GSM基站和306个TD—SCDMA基站进行电磁辐射的监测,结果表明,各基站电磁辐射满足单个项目管理低于目标限值0．08W／m2的标准。分析表明,基站在正常运行时,对周围的电磁辐射环境影响能满足国家相应标准的要求。     

EEG bioeffects on cochlear deaf from cellular phones

Objectives This paper aims to provide evidence of an inductive electromagnetic bioeffect on the human brain, which is independent from sound waves and produced by mobile phones, in proximal field, through correlating the EEG data obtained from electrodes placed on both normal and cochlear deaf individuals. Methods Two groups of subjects are placed under controlled electromagnetic conditions inside a Faraday chamber, 12 healthy and another 12 suffering from cochlear deafness). Each is sitting on a chair, fitted with additional support, and holding a cellular phone 2 cm away form the right auricular, in order to avoid a thermal effect as much as possible. All of them, relaxed and with their eyes closed, are EEG recorded in a basal state with their mobile phones off. Then, each of them is again recorded under the same conditions but with the mobile on and listening to the same conversation. In order to assess the observed EEG changes, a statistical analysis by means of the FFT (Fast Fourier Transform) was carried out. Results For both, healthy and cochlear deaf, assimilation or integration of the mobile phone signal by some electrodes is to be found. This is due to the increase of amplitudes for alpha and theta waves, whereas the signal is not integrated in other electrodes. By correlating the spectra of frequencies of corresponding EEG records for the same brain areas, we have not observed significative differences for both groups. Conclusions A possible electromagnetic direct inductive, non-thermal, bioeffect on the human brain is observed. This effect is produced by the use of mobile phones and it bears no relation to the sound waves.     

工频电磁场环境管理目标值的研究

介绍了国外工频电磁场对人体影响的最新研究进展,收集了国内外工频电磁场的限制标准,结合南方沿海某城市近年来工频电磁场投诉的热点和难点,针对问题研究防治对策,提出了深圳市工频电磁场的环境管理目标值。     

浅谈环境污染中的计算机电磁辐射

计算机已经成为人们日常工作、生活所必不可少的重要工具.然而计算机在运行时,发出的电磁波不利于人体健康.如何防止和降低计算机的电磁辐射是计算机用户应该关注的重要问题.     

电磁辐射测量仪对测量结果的影响分析

目前国内外对环境电磁波的测量仪器主要分为两类,分别是选频式和非选频式。选频式仪器由各类测量接收机或频谱分析仪和接收天线组成,其不适于非周期信号测量。非选频式仪器由各类全向型探头和主机组成,适用于周期和非周期信号的环境电磁波测量,但这类仪器动态范围不高。本文采用了两种不同的测量仪器,分别以单频连续波和调制脉冲为激励信号进行比较分析。结果表明：随着测量信号电平增加,两种仪器测量结果数据趋于一致。而在用两种标准的不同方法计算某一频段的复合场强时,其数值有较大差异。     

电磁干扰场强的测量不确定度评定

根据《测量不确定度评定与表示》JJF1059—1999及《电磁干扰不确定度评定指南》,针对电磁干扰场强的测量进行了不确定度分析。     

移动电话的电磁辐射对人体伤害及其预防措施的探讨

随着移动电话的迅速普及 ,由其产生的电磁辐射对人体健康的影响已成为人们关心的热门话题。笔者就移动电话的电磁辐射对人体的伤害及其有关预防措施进行探讨。旨在提醒人们正确使用手机 ,尽量减少手机辐射对人体健康的影响 ,起到宣传教育和指导作用     

城市电磁辐射污染评价─—功率密度传播模型

通过厦门和漳州两城市电磁辐射测试研究，给出城市电磁辐射功率密度传播模型。提出按传播模型，取少量测试点实测数据，用“三点逐进估算法”计算，得出整个城市人口暴露评价的方法。     

GSM移动通信基站电磁辐射污染状况研究

介绍了GSM移动通信基站系统,指出,在进行GSM移动通信基站环境影响分析时,要注意采样点位的设置和测量要求.现场监测结果表明,GSM移动通信基站对环境电磁辐射水平有一定的影响,特别是对50 m内建筑物影响显著,但绝大多数基站基本符合国家有关电磁辐射环境影响标准的要求,在设备正常运行情况下,不会对周围环境造成电磁辐射污染.