Shielding from ELF Magnetic Fields Emanating from Power Plants in Large Facilities

Summary Large facilities frequently have internal power plants. High power transformers and low voltage cables associated with these plants generate low-frequency magnetic fields of large amplitude, which can be above allowed exposure levels. In order to shield against these magnetic fields large shields are used. These plates are finite and their shielding effectiveness is compromised due to their finite dimensions. This paper evaluates the shielding afforded by such a plate, as related to the geometry of the placement of the source and victim and the dimensions and structure of the shield plate.     

西部国内旅游远程市场旅游产品开发

旅游产品的开发水平是西部旅游业发展的制约因素.在西部国内旅游营销中,要把东部客源市场作为远程旅游目标市场,远程旅游产品的开发要以市场为导向.在分析东部客源市场特点的基础上,提出了西部国内旅游远程市场旅游产品的开发策略:①体现西部特色,与东部旅游产品形成互补;②以资源保护为前提,开发生态型旅游产品;③整合西部旅游资源,开发跨区域旅游精品;④协调好各旅游要素的功能,形成不同等级的旅游服务系统;⑤针对东部地区客源市场特点设计旅游产品;⑥重视老年旅游和青少年学生旅游产品的开发.     

浅析成都市生活垃圾焚烧发电的经济可行性

根据成都市生活垃圾性状和现有的工业基础及技术经济条件，对成都市建设生活垃圾焚烧发电厂的经济可行性进行了初步分析，指出上网电价为0．25元／千瓦时，政府对处置垃圾的补贴费为50元／吨，是经济可行的。     

浅析存款业务创新

从技术角度来探讨银行的存款业务创新，提出商业银行应该考虑经济发展情况、金融文化背景等因素，以满足客户的需求为目的来设计、组织存款要素，并在市场细分的基础上，提供差别化存款产品，按市场规律进行定价。     

The Effects of Three Thermo Electric Power Plants on Yerkesik-Denizova Forests in Mugla Province (Turkey)

Mugla is a city that is located in the southwest part of Turkey. Three thermo-electric power plants called Yatagan (3 × 210 MW) and Yenikoy (2 × 210 MW)and Kemerkoy (Gokova, 3 × 210 MW) havebeen constructed in this region and also have begun operation in 1982 – 1983 – 1984 (three units), in 1988 and in 1995, respectively. The Pinus brutia forests in Yerkesik–Denizova region have been under the common effects of Yenikoy and Yatagan thermo-electric power plants. Therefore, these Pinus brutia forests have startedto dry in groups since 1988. In addition, Kemerkoy thermo-electric power plant, began operation in 1995.Polluting gases arrived in Denizova-Yerkesik throughKoca Stream Valley Forests.Increasing quantities of polluting gases and especially SO₂ have dried the trees in large amounts in this 1650 ha forestland area. YataganThermo-electric power plant has caused drying of Pinus brutia in Bencik Mountain, which was on the south in 1984–1985. The same phenomenon was seen in Denizova-Yerkesik Forest in 1999–2000. It was observed that sulphur content was varying between 4218–6676 ppm at the Pinus brutia needle samples taken in this region on 16 December 2000. Sulphur contents were correlated with the age of needle (1–2 yr old), density of yellow stains on the needles and amount of drying needles. Particularly in 1996–2000 period, the destruction of chlorophyll in needles due to the impacts of SO₂ was also correlated with narrowing of the annual rings from one year to another. The narrowing ratio of yearly rings reached 60–504% for 94–95 yr old, and 375–661% for 58–63 yr old Pinus brutia trees during the 1986–1990, 1991–1995 and 1996–2000 periods.All these results clearly showed that the decrease in the chlorophyll content in needles under the effect of air pollution caused important reduction in the raw timber production and its inputs to the economy. In other words, drying due to increased ecological sensitivity or direct hazard of pollutants emitted by the power plants and cutting of trees have been notably increased in the region. This has created serious economic losses.     

关于建设环保领域市场大平台的思考

在环境保护意识已经渗透到地球村每个角落的今天,我国科研成果转化率低的问题在环保领域也成为一个“瓶颈”问题。借鉴发达国家成功的经验,在环保领域运用市场化体制建立信息、资本、交易、政策法规等发展平台,对提高环保技术成果转化具有十分重要的现实意义。     

火电厂节水与废污水回用研究

从火电厂加强水务管理和废污水治理的角度，对生活污水、含油污水、灰水、循环水的治理现状和措施作了较全面地介绍，初步分折了火电厂节水的经济效益，并介绍了实际工程设计中的一些体会。     

EE型电除尘器在200MW机组上的应用

介绍了EE型电除尘器在安徽准北发电厂200MW发电机组配套锅炉上的应用情况以及处理高比电阻粉尘的方法。     

火电厂推行ISO14001体系与节能降耗

分析了环境管理体系(EMS)中的节能降耗与火电厂传统的节能工作之间的区别与联系，并通过火电厂推行EMS所取得的节能降耗实绩，阐述其对传统节能工作的促进作用。     

对火力发电企业建立ISO14001环境管理体系的建议

简述了发电企业在建立ISO14001环境管理体系时应注意的一些问题，对如何建立和运行环境管理体系提出了建议，以促进企业的环境保护工作。