滇东北乐红铅锌矿床地质特征及找矿远景

乐红铅锌矿自20世纪50年代以来就有多家地勘单位先后进行过普查找矿,均以"层控"观点为指导没有进展而中途下马,90年代后期,云南第一地质大队以"构控"新思路开展新一轮找矿,获得突破性进展。在研究区域成矿地质背景、矿床地质特征及控矿地质因素的基础上,认为矿床为受断裂构造控制的热液充填交代型铅锌(银)矿床,并根据控矿断裂特征及成矿地质条件,指出乐红矿区及外围具有形成大型矿床的找矿远景,应该加强该区的地质找矿工作。     

Regional assessment of ozone sensitive tree species using bioindicator plants

Tropospheric ozone occurs at phytotoxic levels in the northeastern and mid-Atlantic regions of the United States. Quantifying possible regional-scale impacts of ambient ozone onforest tree species is difficult and is confounded by other factors, such as moisture and light, which influence the uptake of ozone by plants. Biomonitoring provides an approach to document direct foliar injury irrespective of direct measure ofozone uptake. We used bioindicator and field plot data from theUSDA Forest Service to identify tree species likely to exhibit regional-scale ozone impacts. Approximately 24% of sampled sweetgum (Liquidambar styraciflua), 15% of sampled loblollypine (Pinus taeda), and 12% of sampled black cherry (Prunus serotina) trees were in the highest risk category. Sweetgum and loblolly pine trees were at risk on the coastal plain of Maryland, Virginia and Delaware. Black cherry trees were at riskon the Allegheny Plateau (Pennsylvania), in the Allegheny Mountains (Pennsylvania, West Virginia, and Maryland) as well ascoastal plain areas of Maryland and Virginia. Our findings indicate a need for more in-depth study of actual impacts on growth and reproduction of these three species.     

东北小城镇饮用水处理技术专家系统建立

针对东北地区小城镇水处理技术匮乏、饮用水水源类型复杂等问题,对现有饮用水处理技术与工艺进行归纳分析,建立东北小城镇饮用水处理技术专家系统。该专家系统软件可根据具体的原水条件遴选出适合东北小城镇水源的给水处理技术与工艺,具有水质判定、工艺查询、技术支撑等功能,为东北地区小城镇饮用水工程建设提供科技支撑。     

基于灰关联的大连庄河市生态安全评价研究

大连庄河市是辽宁沿海经济带的重点开发区,其生态安全状况对于振兴东北老工业基地有着极其重要的意义。运用灰色关联法对庄河市城市生态安全进行评价,结果表明,2002年-2008年庄河市的生态安全关联度均在5.5以上,生态安全状况比较乐观。从动态趋势上看,庄河市生态安全系统处于稳定增长状态。通过结果的分析,为沿海经济带开发在生态安全方面提供数据支持。     

Quantitative Ethnobotany in an Atlantic Forest Fragment of Northeastern Brazil – Implications to Conservation

Two new methods for assessing temporal trends in stream-solute concentrations at specific streamflow ranges were applied to long (40 to 50-year) but sparse (bi-weekly to quarterly sampling) stream-water quality data collected at three forested mesoscale basins along an atmospheric deposition gradient in the northeastern United States (one in north-central Pennsylvania, one in southeastern New York, and one in eastern Maine). The three data sets span the period since the implementation of the Clean Air Act in 1970 and its subsequent amendments.Declining sulfate (O ₄ ^2-) trends since the mid 1960s were identified for all 3 rivers by one or more of the 4 methods of trend detection used. Flow-specific trends were assessed by segmenting the data sets into 3-year and 6-year blocks, then determining concentration-discharge relationships for each block. Declining sulfate (O ₄ ^2-) trends at median flow were similar to trends determined using a Seasonal Kendall Tau test and Sen slope estimator. The trend of declining O ₄ ^2- concentrations differed at high, median and low flow since the mid 1980s at YWC and NR, and at high and low flow at WR, but the trends leveled or reversed at high flow from 1999 through 2002. Trends for the period of record at high flows were similar to medium- and low-flow trends for Ca²⁺+ Mg²⁺ concentrations at WR, non-significant at YWC, and were more negative at low flow than at high flow at NR; trends in nitrate (NO₃ ^-), and alkalinity (ALK) concentrations were different at different flow conditions, and in ways that are consistent with the hydrology and deposition history at each watershed. Quarterly sampling is adequate for assessing average-flow trends in the chemical parameters assessed over long time periods (∼decades). However, with even a modest effort at sampling a range of flow conditions within each year, trends at specified flows for constituents with strong concentration-discharge relationships can be evaluated and may allow early detection of ecosystem response to climate change and pollution management strategies.     

东北玉米热量指数预测方法研究(Ⅱ)——逐步回归预测方法

利用1960-2005年74类大气环流资料,从玉米播种期的5月开始到8月,逐月滚动建立了东北3省典型站玉米热量指数的逐步回归模型.各月模型都能较好地预测该区玉米生长季内的热量状况.检验结果表明,通过运用滚动预报的方法,可以有效地提高预测玉米生长季内热量指数的准确率.     

2003~2014年东北三省气溶胶光学厚度变化分析

利用2003~2014年MODIS-Aqua气溶胶光学厚度（AOD）产品、DMSP卫星夜间灯光时间资料和基本气象资料,分析我国东北三省（辽宁、吉林、黑龙江）大气气溶胶光学厚度年际变化及季节变化的空间分布特征.结果表明,东北三省多年平均AOD空间分布存在由大连、沈阳、长春和哈尔滨等城市构成的一个高值带,呈东北-西南走向,多年平均AOD值为0.4~0.8;东北三省植被覆盖率较高的东部和北部是AOD的低值区,多年平均AOD小于0.3;东北三省AOD季节变化为AOD春季到夏季升高,秋季下降,冬季再次升高.东北三省AOD年际变化特征为大部分低值地区呈减小趋势,但以沈阳、长春和哈尔滨为轴线的东北-西南走向的高值区域呈增大趋势,反映了近10多年出现的空气质量两极分化趋势.此外研究了东北三省年均AOD在强、弱西北太平洋夏季风年时的空间分布差异,受地面风场影响,AOD在强季风年时较弱季风年偏低.     

东北玉米热量指数预测方法研究(Ⅳ)——均生函数预测方法

均生函数预测方法是开展环境要素变化趋势预测的有效方法之一。通过对东北地区玉米热量指数的分析,建立了热量指数时间变化趋势的均生函数预测模型,各模型预测的平均精度基本都达到95%以上,与逐步回归统计模型一致,但普遍要好于GM(1,1)模型,同样可以应用该模型的预测结果指导农业生产。     

东北旅游区探险旅游的开发构想

文章阐述了探险旅游及探险旅游资源的涵义,并说明了其在东北旅游区的调查评价方法,从东北旅游区现有的旅游资源中筛选出各个次级区域中有代表性的适于开展探险旅游的资源客体.在客观分析东北旅游区内各次级区域或资源单体的优势和分析客源市场并准确定位的基础上,提出了各次级区域或资源单体的开发方式以及其应主推的探险旅游产品.引用有关公式用于对重点开发的探险旅游区进行相关指标的定量计算.结合东北旅游区现有的发展状况,相应提出了相关行业的发展策略.     

赣东北中生代火山岩微量元素与稀土元素丰度及其演化

本文论述了赣东北中生代火山岩中微量元素与稀土元素在不同岩性岩相及时空上的分布规律:潜火山岩中Au、Ag、Cu、Pb、Zn平均含量高于火山岩,尤以中酸性岩中较高,Ⅰ,Ⅱ旋回高于其他旋回。稀土元素由Ⅰ向Ⅱ旋回,由扬子地体向华夏地体,由爆发相向溢流相、潜火山岩相,由偏基性向中酸性岩演化;稀土配分模式是“L”型,火山岩物质来源于下地壳的部分熔融。