厦门鼓浪屿某基坑事故分析与处理

本文通过对某基坑的设计、施工进行分析以及事故的处理,介绍了在临海杂填土地区地质情况较为复杂的情况下应注意的问题,供同行参考。     

基于GIS的中国东部经济区带区域承载力定量研究

在分析中国东部经济区带发展存在的主要问题的基础上,运用主成分分析法和生态足迹法,依照构建的评价指标体系对1998—2007年中国东部经济区带区域承载力和承载状况进行定量评价。结果表明,1998—2007年,生态赤字增加趋势明显,主要以大中型城市为中心扩散分布。承载状况“良好”的地区一般同化能力较强,但是支撑能力较弱,相对承载量较小,无生态赤字;而承载状况“较差”的地区一般同化能力中等或较弱,尽管支撑能力较强,但是相对承载量大,因而生态赤字严重。最后,根据定量评价的结果,因地制宜提出了相应的政策建议。     

Technetium-99 (Tc) in annual growth segments of knotted wrack (Ascophyllum nodosum)

The distribution of technetium-99 (⁹⁹Tc) in annual growth segments of the brown seaweed Ascophyllum nodosum (Fucales, Phaeophyceae) from the southwestern coast of Norway is examined in samples collected from January to November 2006. A twenty-fold increase in the ⁹⁹Tc-concentration from the youngest to the oldest growth segments was found. The concentrations ranged from 42 to 98 Bq/kg dry weight (d.w.) and from 964 to 1000 Bq/kg d.w. in growth segments formed in 2006 and 1996, respectively. In addition, a seasonal variation in the ⁹⁹Tc concentration was observed in the actively growing 2006-segments: concentrations decreased from 98 Bq/kg d.w. in April to 54 Bq/kg d.w. in June; there was a further reduction from June to August (42 Bq/kg d.w.); and, finally there was an increase from August to November (93 Bq/kg d.w.). In most of the segments formed between 2000 and 2005, there was a tendency of slightly decreasing ⁹⁹Tc-concentrations between June and November but this pattern was not observed for the older growth segments. In order to find an explanation for the non-homogenous distribution of ⁹⁹Tc within thalli of A. nodosum, different hypotheses are discussed. Uptake and elimination of ⁹⁹Tc appears to be most pronounced in the actively growing segments. To date, such non-homogenous distribution of ⁹⁹Tc within thalli of A. nodosum has not been taken into consideration, neither in connection with sample collection nor analysis. This paper shows that special protocols must be followed if A. nodosum is going to be used as a bioindicator for ⁹⁹Tc in the marine environment. A sampling strategy is proposed.     

库岸失稳滑坡的锚索处理

阐述了龙凤山水库库岸失稳滑坡的锚索处理的施工设计过程和施工工艺，处理后的运行监测结果表明，效果良好。     

Analytical Profile of Organo-nitrogen Compounds in Gulf Coast Refined Fuels by GC/MS

This study examines the composition of two samples of crude fuels originating from the Gulf Coastal areas of the United States. Both nitrogen-containing basic compounds as well as non-basic hydrocarbon compounds were evaluated for presence and relative amount in these two samples. The extractions of the basic nitrogenous compounds were achieved with weak acid extractions. The basic nitrogenous compounds, due to emulsification, formed two distinct fractions. The nitrogenous based-compounds were comprised of pyridines, quinolines, tetrahydroquinolines, indoles, and carbazoles to varying amounts. The hydrocarbon content in each of the two fuels analyzed was found to contain mostly naphthols.     

多种卫星传感器反演长江口悬浮泥沙浓度的对比分析

通过用Shen等~([1])的方法对Terra/MODIS、FY-3A/MERSI、COMS/GOCI传感器入瞳处的辐射亮度即天顶辐射亮度进行反演计算,得出了遥感反射率Rrs与悬浮颗粒物(Suspended Particulate Matter,SPM)浓度的数据,并将上述反演与Envisat/MERIS反演进行了对比。结果表明,MODIS、MERSI、GOCI传感器的天顶辐射亮度与MERIS的线性相关性均较好;GOCI、MODIS与MERIS的Rrs一致,MERSI与MERIS的R_(rs)相差较大,尤其在近红外区域。MODIS、MERSI和GOCI反演的SPM数据与MERIS反演的绝对偏差分别为36%、31%和26%。对于长江口、杭州湾及江苏沿岸的高浊度水体,3种传感器反演的SPM均与MERIS反演的SPM相近。对于离岸较远的低浊度水体,仅GOCI能很好地体现。     

深化实验教学中心建设推动海西土木人才培养

从转变教育理念注重自制设备在本科生创新能力培养中的作用;提高设备使用效率;凝练中心发展特色;总结建设成果;明确发展方向等六个方面,介绍了福州大学土木工程实验教学中心为推动实验教学模式转变,提高创新人才培养质量所开展的一系列内涵建设及成效。     

Mineral composition of edible seaweed Porphyra vietnamensis

Edible seaweed Porphyra vietnamensis growing along seven different localities of the Central West Coast of India was analyzed for mineral composition (Na, K, Ca, Mg, B, Pb, Cr, Co, Fe, Zn, Mn, Hg, Cu, As, Ni, Cd and Mo) by inductively coupled plasma atomic emission spectroscopy (ICP-AES). The concentration ranges found for each sample, were as follows: Na, 24.5–65.6; K, 1.76–3.19, Ca, 1.40–6.12; Mg, 4.0–5.90 (mg/g d wt); Pb, 0.01–0.15; Cr, 0.13–0.22; Co, 0.06–0.20; Fe, 33.0–298; Zn, 0.93–3.27; Mn, 4.22–10.00; Hg, 0.01–0.04; Cu, 0.54–1.05; As, 1.24–1.83; Ni, 0.02–0.25; Cd, 0.14–0.55; Mo, 0.02–0.03 and B, 0.02–0.07 expressed in mg/100 g dry weight. Mineral composition of P. vietnamensis was found relatively higher as compared to the land vegetables as well as to other edible seaweeds, and it is in concurrence with the recent macrobiotic recommendation for western countries. It could therefore be used as food supplement as a spice to improve the nutritive value in the omnivorous diet.     

我国东部沿海地区电源结构优化目标

我国东部沿海地区经济发达,是我国的电力负荷中心。预计到2020年,东部沿海地区经济增长速度高于或至少等于全国平均增长速度,单位产值电耗低于全国平均水平,居民生活用电水平高于全国平均水平。为实现东部沿海地区电力可持续发展,在研究东部沿海地区能源结构的基础上认为,要大力发展核电,扩大“西电东送”和“西气东输”规模,进一步降低煤电比重。开发“绿色能源”,发展风电,在东部沿海及海上建设风电场示范工程,达到推广应用的目的。     

吕四海岸不同填海规划方案的冲淤预测与分析

针对吕四海岸周围区域的水流、泥沙等进行了模拟计算,阐述了计算过程中涉及的水动力数值理论、泥沙运动主控方程等内容,并对工程实施海域的数值模型配置及其验证作了介绍,通过对不同方案冲淤变化的比较得出一些具有指导性的结论。