Differences in the rainwater composition on two consecutive days

The relationship between the rainwater composition on two consecutive rain days was analyzed. Logrono, a remote station in the North of Spain was chosen for the analyses. The concentration of the major ions in the rainwater of the first rain day is linearly related to the concentration of the second rain day except for those ions whose source is the soil (Ca²⁺ and Mg²⁺). These ions are related to SO₄ ^2? and NO₃ ^? in the first rain day, but not in the second.     

动力站噪声的综合治理

辽宁轮胎厂对动力站噪声进行分步进行治理，通过采取吸声、消声和隔声措施，使动力站的混响噪声得到了大幅度下降，达到了国家标准，取得了预期的效果。     

四川省电力工业环境现状及防治对策

本文概述了四川电力工业环境现状,特别是二氧化硫的污染形势严峻。通过一系列数据,说明四川省电力工业控制SO_2污染已势在必行。     

水电施工现场生产用电安全评价

概述了我国水电工程施工企业的施工现场用电安全情况和发展形势,分析了施工触电事故的一般规律性,提出了水电施工现场用电安全评价方法及安全分级标准。采用的评价表法具有科学性、现实性和操作性。     

小水电站环境影响评价中的公众参与

本文分析了小水电站建设对环境影响的特殊性，阐述对其环境影响评价中的公众参与的特殊内容，提出了公众参与的三种方式：公众个人问卷调查、基层组织调查、县(市)政府公共管理部门调查。     

铁路中小站段污水处理匹配技术浅析

铁路通车里程迅速增加，铁路中小站段随之增长。站段内污水排放达不到国家排放标准而引起的环境恶化事例屡见不鲜。作者通过现场调研和资料查询，针对中小站污水排放量小、浓度较低的特点，综合分析了厌氧生物处理系统、SBR法等几种常用铁路污水处理工艺，对铁路水处理技术的发展具有一定的指导意义。     

An investigation of the effects from the user’s hand and head over received level and adaptive power control of a GSM mobile phone in typical operating environment

Current evolution of wireless personal communications has necessitated a comprehensive understanding of electromagnetic interactions between handset antennas and nearby human body. In this work the handset–human body interactions were evaluated in various configurations (with and without user’s hand; with and without user’s head, and combinations of them) in order to obtain statistical averages of the overall performance for system link evaluations. The measurements were performed using the random-field measurement (RFM) method, and thus the acquisition of large amounts of data about human–mobile phone interactions in typical operating environment with measured the received RF signal strength (RXLEV), and the output power level (TXLEV) on mobile station. The RXLEV and the TXLEV was measured over the air interface in the networks on two Bulgarian GSM mobile operators (Mtel and Vivatel). Both uplink and downlink measurements were performed in urban area in three cities. Each measurements were carried out in a building included both line-of-sight and non-line-of-sight propagation of the electromagnetic waves between mobile station and base station. The results showed that the user’s hand and head induces more significant changes on the received RF signal strength in case when broadcast control channel (BCCH) levels are up to −60 dBm. Also the alterations of receiving RF signal strength and output power level of the MS are influence stronger from the larger size of the hand and head of user. The influence from presence of the head and hand of the subscriber in talk position over the alteration of the receiving RF signal strength is in boundaries from 14.21 dBm to 19.1 dBm (man) and from 8.5 dBm to 12.05 dBm (woman). The presence of the user’s hand and head increased the output power level of mobile station with 12 dBm to 14 dBm (man) and with 10 dBm to 12 dBm (woman) compare to output power level without user’s hand and head.     

燃煤电厂烟气脱硫设施出口二氧化硫排放量统计方法比较

本文比较了监测数据法、物料衡算法和在线数据法统计燃煤电厂烟气脱硫设施出口二氧化硫排放量的方法,并对比分析了三种方法的实际监测结果和优缺点,指出在线监测法能够准确反映电厂排污情况,对监测、考核燃煤电厂烟气脱硫设施运行和二氧化硫排放量具有现实意义。     

高功率微波武器对C^4ISR系统毁伤效应研究

复杂电磁环境下电子设备易感性问题已引起广泛的关注,特别是军用C4ISR．系统对电子设备的依赖性,使得电磁脉冲的威胁进一步增大。对电磁脉冲的毁伤机理进行了阐述,概叙了电子器件毁伤的特征阈值,并从电磁脉冲对C^4ISR系统信息源的威胁、对计算机系统网络的威胁以及对C4ISR通信网络的威胁等方面分析了高功率微波武器对作战系统的影响,最后提出了防御电磁脉冲的具体防护措施。     

焦作电厂#2机组脱硫除尘系统调试分析

通过对焦作电厂#2机组脱硫除尘系统调试分析,讨论了多条脱硫工艺线时脱硫除尘系统对锅炉负荷的适应性试验,袋式除尘器的在线检修等问题。