江苏马尾松林下木本植物群落相似性和生物多样性的调查

根据作者的初步调查，在江苏南部丘陵酸雨的地区（宜兴，南京）清洁地区（句容茅山）马尾松林下木本植物的生物多样性指数分别是１．９９２６，１．７０４５，１．２９８７，宜兴和句容，南京和句容马尾松下层群落相似性素数在１０％左右，而南京和宜兴的群落相似性系数为２０％左右。     

江西井冈山甜槠群落特征及物种多样性

井冈山自然保护区地处中亚热带的东部，以甜槠等为建群种的常绿阔叶林是井冈山的主要地带性植被。通过对甜槠群落进行分析研究，充分认识其群落学特征和物种多样性，为该植物群落多样性保护与持续利用提供科学依据。     

直接空冷技术原理与组成

文章介绍了发展直接空冷系统的意义和必要性,直接空冷系统的工作原理、组成和特点.     

丹东市城市生活垃圾成分现状调查

通过对丹东市城市生活垃圾成分调查分析，基本掌握了垃圾物理成分组成、无机物百分比和有毒有害化学物质的含量。提出了对丹东市城市垃圾处置的建议。     

上海雾天大气污染及雾水组分研究

首次较系统地监测调查了上海市雾天的大气污染状况，并分析了雾水的化学组分，结果表明，上海出现雾天时，不利于大气污染物的扩散，造成雾天大气污染较严重，污染物浓度高值出现的时间与雾的形成至消散基本同步，比起雾前高２－１０倍。     

Trophic attributes of the mudskipper,Periophthalmus barbarus (Gobiidae: Oxudercinae) in the mangrove swamps of Imo River Estuary,Nigeria

Aspects of the trophic attributes of the mudskipper, Periophthalmus barbarus occurring in the mangrove swamps of Imo River　Estuary, Nigeria, were investigated during a 12-month period (April, 1992-March, 1993). Feeding intensity increased with size, it was　higher in the dry season(November-April) than in the wet season(May-October), monthly changes in the indices of feeding intensity were　significantly correlated. Major food objects comprised detritus and benthic algae; crustaceans, insects, macrophyte matter and sand grains were minor food objects while fish, molluscs, Chilopoda, nematodes and fungi were unconsciously devoured objects. Diet varied seasonally; algae and sesarmid crabs were generally more in the dry season than during the rains whereas FPOM and fish increased in the wet over dry season.The mudskipper display a high degree of euryphagy and can be considered as a generalist and an omnivore. The lower trophic status of P.barbarus qualifies it as a good aquaculture candidate. Food richness was higher in big-sized class(BSC) than small-sized class(SSC). Sizebased and seasonal variations were not apparent in food richness. Diet breadth was higher in the BSC than the SSC, there was dry season increase in diet breadth.     

北京首都机场污水处理厂自动化控制系统

北京首都国际机场污水处理厂于 1999年 10月建成通水 ,是实现全自动运行的污水处理厂之一 ,介绍了该厂自控系统组成 ,工艺操作模式及其运行结果     

Community and farm forestry climate mitigation projects: case studies from Uttaranchal,India

The methodologies for forest mitigation projects still present challenges to project developers for fulfillment of criteria within the Clean Development Mechanism (CDM) or other such mechanisms for the purpose of earning carbon credits. This paper systematically approaches the process of establishing carbon (C) stocks for baseline (BSL) and mitigation scenario (MSL) for two case studies i.e., community and farm forestry projects in Uttaranchal, India. The analysis of various interventions shows that both projects present high carbon mitigation potential. However, the C reversibility risk is lower in long-rotation pine and mixed species plantation on community lands. The project is financially viable though not highly lucrative but the carbon mitigation potential in this ‘restoration of degraded lands’ type of project is immense provided challenges in the initial phase are adequately overcome. C revenue is an essential driver for investors in community projects. The short-rotation timber species such as Eucalyptus (Eucalyptus), Poplar (Populus) have high internal rates of return (IRR) and high carbon benefit reversibility potential due to fluctuations in market prices of commodities produced. The land holdings are small and bundling is desired for projects to achieve economies of scale. The methodological concerns such as sampling intensities, monitoring methodologies, sharing of benefits with communities and bundling arrangements for projects need further research to make these projects viable.     

月球紫外-可见-近红外反射光谱的基本特征及解析方法

月球紫外-可见-近红外反射光谱(强度,反照率以及吸收特征)是研究月球表面物质组成的重要手段。文章简要介绍了月球表面反射光谱的基本特征、形成机制以及现有月球反射光谱数据及其解析方法。这些方法主要有光谱参数、连续背景扣除、高斯反卷积分析以及主成分分析。还讨论了高光谱探测器在月球探测中的应用前景、已有方案以及获取新的月球样品对月球反射光谱研究的重要性。     

黄海西部大气湿沉降(降水)的离子平衡及离子组成研究

对黄海西部的千里岩、青岛的麦岛两个降水采样点１９９７、１９９８两年收集的１１３个降水样品进行了分析,测定了Ｈ＾＋、ＮＨ４＾＋、Ｋ＾＋、Ｎａ＾＋、Ｃａ＾２＋、Ｍｇ＾２＋、Ｆ＾－、Ｃ１＾－、ＮＯ３＾－、ＳＯ４＾２－共１０种离子成分的含量。计算了阴离子和阳离子的浓度总量,考察了∑－／∑＋值,对所８测１０种离子的含量顺序进行了探讨。结果表明：１１０个样品离子平衡（∑－／∑＋在０．７５～１．２５之间）,３个