风幕集烟尘风机治理焊烟污染的研究

介绍了工业电焊烟尘的产生原理及特点,重点论述了风幕集烟尘风机在治理工业焊烟中的理论研究,论证了利用“短路流场”控制烟尘理论的可行性和先进性。讨论了造成“短路流场”的风幕集烟尘风机的结构及集烟尘原理。该项技术经对各种型式样机的研制和多次烟尘试验及大量测试分析,从理论上建立了“短路流场”数学模型,实际烟尘试验验证了其良好的集烟尘效果。为适应现场状况,提出了烟尘净化综合处理系统方案。     

An approach to integrated ecological assessment of resource condition: the Mid-Atlantic estuaries as a case study

The complex and interconnected nature of ecological systems often makes it difficult to understand and prevent multiresource, multistressor problems. This article describes a process to assess ecological condition at regional scales. The article also describes how the approach was applied to the Mid-Atlantic estuaries, where it focused on characterizing the current state of the environment rather than on predicting future effects from humans. The necessity for iteration during the exercise showed how important it was to identify the purpose of the assessment and its users, that appropriate, consistent data are lacking for large-scale assessments, and that it remains a challenge to communicate succinctly the results of such an assessment.     

苏南太湖地区乡镇工业水污染综合防治研究

分析了苏南太湖地区迅猛发展的乡镇工业对水环境造成的污染,并提出了综合防治对策和意见:①利用水环境容量,合理布局乡镇工业;②合理调整行业结构;④积极开展生产全过程的排污控制;④认真进行废水治理,切实加强环境管理。     

国际河流整体开发和管理及两大理论依据

概括了国际河流开发和管理特征、存在的主要问题和“流域整体开发和管理”的演进过程 ,分析了系统理论和可持续发展理论的具体体现 ,提出国际河流整体开发和管理主要体现在以下三个方面内容 :(1)强调区域之间的联系 ,要求从全流域的角度 ,而不是仅仅从国家的角度来进行开发和管理。在资源开发和管理中兼顾各流域国的目标 ,体现公平合理性 ,要求一国的开发利用对其它流域国不造成重大损害 ;要求各流域国加强合作。 (2 )强调流域内各要素的相关性 ,要求资源的开发和管理中考虑相关资源的利用问题 ,如与水资源相关的土地资源利用问题 ,以及国家之间的制度协调等社会人文因素。 (3)要求考虑河道生态系统的可持续性 ,维护流域的可持续发展。     

中国西部地区旅游开发对策研究

我国西部旅游资源具有巨大的开发潜力,但旅游发展受到多方面的限制.旅游整合开发战略是在科学分析西部地区旅游发展优势和局限因素的基础上提出的科学决策,对西部旅游开发具有切实的指导意义.西部应着重以下工作:吸引资金,重视人才,实行政府主导型开发;改善基础设施落后面貌,做好旅游营销和宣传工作;增加资源开发的深度与广度,合理规划旅游路线,开发旅游商品;科学规划,加强监测,实行生态保护.     

绵阳市环境空气质量监测系统中心控制软件开发应用研究

利用Microsoft office 2002软件开发绵阳市环境空气质量监测系统中心控制软件，具有智能模块化功能，从数据采集、整理、统计、计算、制图、制表等方面均可自动完成，直观、快捷、高效，可满足空气质量日报准确、及时上报要求，并可以较短时间内完成空气质量预报，可操作性强。     

SOIL EROSION AND SEDIMENT YIELD PREDICTION ACCURACY USING WEPP1

ABSTRACT: The objectives of this paper are to discuss expectations for the Water Erosion Prediction Project (WEPP) accuracy, to review published studies related to WEPP goodness of fit, and to evaluate these in the context of expectations for WEPP's goodness of fit. WEPP model erosion predictions have been compared in numerous studies to observed values for soil loss and sediment delivery from cropland plots, forest roads, irrigated lands and small watersheds. A number of different techniques for evaluating WEPP have been used, including one recently developed where the ability of WEPP to accurately predict soil erosion can be compared to the accuracy of replicated plots to predict soil erosion. In one study involving 1,594 years of data from runoff plots, WEPP performed similarly to the Universal Soil Loss Erosion (USLE) technology, indicating that WEPP has met the criteria of results being “at least as good with respect to observed data and known relationships as those from the USLE,” particularly when the USLE technology was developed using relationships derived from that data set, and using soil erodibility values measured on those plots using data sets from the same period of record. In many cases, WEPP performed as well as could be expected, based on comparisons with the variability in replicate data sets. One major finding has been that soil erodibility values calculated using the technology in WEPP for rainfall conditions may not be suitable for furrow irrigated conditions. WEPP was found to represent the major storms that account for high percentages of soil loss quite well—a single storm application that the USLE technology is unsuitable for—and WEPP has performed well for disturbed forests and forest roads. WEPP has been able to reflect the extremes of soil loss, being quite responsive to the wide differences in cropping, tillage, and other forms of management, one of the requirements for WEPP validation. WEPP was also found to perform well on a wide range of small watersheds, an area where USLE technology cannot be used.     

Integrated Assessment of Abatement Strategies to Improve Air Quality in Urban Environments, the USIAM Model

Planning effective strategies to combat air pollution in amajor city such as London requires integration ofinformation on atmospheric concentrations and where theyexceed prescribed air quality standards, detailed data onemissions and potential measures to reduce them includingcosts, and a good understanding of the relativecontributions of different emission sources to pollutantconcentrations plus the remaining background. The UrbanScale Integrated Assessment Model (USIAM) is designed as atool to integrate such information, and to explore andassess a variety of potential strategies for improving airquality. It is based on the same principles as theAbatement Strategies Assessment Model (ASAM) that has beenused in the UN Economic Commission for Europe. To startwith the USIAM model is being developed with respect to theparticulate PM₁₀ only, and in particular the primaryparticulate contribution. The secondary particulate istreated as part of the background superimposed on theprimary particulate concentrations; this may need to betreated more specifically at a later stage, particularlywith respect to nitrate formation over the city. The USIAMmodel therefore sets out to examine a selection of severeepisode conditions as well as long-term annual averageconcentrations, and aims to find strategies that aresuccessful in eliminating exceedance of the prescribedtarget concentrations. By ranking different options forabatement of emissions, for example in terms of cost orease of implementation, the USIAM model can also select andprioritise different potential strategies.     

大气污染预测软件的测试

针对大气预测工作中可能出现的各种偏差,结合影响大气扩散的主要因素,对大气污染预测软件的测试方法进行了归纳,提出了测试大气预测软件的基本方案。     

测震单台数字化分析软件的使用技巧

着重叙述了测震单台数字化分析软件SSDP、NNVSIAS的系统设置及使用技巧 ,并就工作中出现的一些问题给出具体的解决办法 ,特别对NNVSIAS在震相分析中的正确使用、震源对话框的恰当运用给出了详细的说明。