^14C标记现场测定海洋初级生产力培养方法比较

以大亚湾和台湾海峡的实测数据为依据，认为培养过程中的搅动十分重要。对比＾１４Ｃ测定初级生产力的几种培养方法，结果表明，悬挂式现场培养法比较可靠，但其应用受到一定限制；旋转培养法与悬挂式现场培养法结果相近，又可在甲板上进行，值得推广；静置培养法由于培养过程中缺乏搅动，数据不稳，结果偏低，不宜采用。２４ｈ连续悬挂式现场培养法的结果及计算机对培养过程的模拟指出，新固定的碳可快速损失，因此培养时间不宜超过     

湄洲湾夏季的初级生产力

湄洲湾１９９２年夏季的叶绿素ａ，三磷酸腺苷，碳比积累速率，初级生产力的变化范围和均值分别为０．４５－４．７２，１．４９ｍｇ／ｍ＾３；０．１２－１．０７，０．３１μｇ／ｄｍ＾３；０．０６－０．５８，０．３４ｄ＾－１；０．０７－０．３４，０．２１ｍ／（ｍ＾２．ｄ）。叶绿素ａ与三磷酸腺苷之间。初级生产力与碳比积累速率之间均呈正相关关系。叶绿素ａ三磷本能腺苷的比值为４．８，湄洲湾夏季浮游植物的生长受氮不足     

光辐射对海洋微藻脂肪酸含量的效应

不同光辐射强度下三角褐指藻和小球藻脂肪酸的气相色谱分析表明 ,光辐射对海洋微藻脂肪酸的含量和组成影响很大。三角褐指藻和小球藻总多不饱和脂肪酸含量随着照度的增加呈下降趋势。在本实验条件下 ,在较低光强 (0 .2 5× 10 3 L ux～ 1.7× 10 3 L ux)时 ,EPA、DHA、C18∶ 3等多不饱和脂肪酸含量较高。     

基于新型超材料结构的高效率发射天线技术研究综述

近年来,超材料打破了传统材料或结构的物理极限,为高效率发射天线的发展开辟了崭新的研究空间,获得了愈来愈广泛的关注.首先介绍了超材料的理论和结构研究概况,然后针对几种新型超材料技术在提高平面天线单元效率的研究工作进行了详细介绍和分析,包括非周期超材料技术、超材料作为新型辐射元或低剖面反射板等方面.最后,针对无线能量收集系统对高效率天线阵列的需求,介绍了高次模激励技术和新型低损耗传输线技术,以此降低阵列馈电网络的损耗,从而提高系统的整体效率.     

几种藻类对氮、磷的同化率与其营养成分的关系

测定了６种单细胞藻对氮，磷的同化率，光合作用速率和各藻的蛋白，氨基酸等营养成分。结果：（１）各藻的氨基酸含量与藻类对氮，磷的同化率呈线性相关；（２）藻的光合作用速率和光合作用指数分别与被藻同化的氨氮和Ｎ／Ｐ比值呈显著的相关关系。     

Study on Kinetics of light-intensity adaptation of Dicrateria inornata

ＳｔｕｄｙｏｎＫｉｎｅｔｉｃｓｏｆｌｉｇｈｔ－ｉｎｔｅｎｓｉｔｙａｄａｐｔａｔｉｏｎｏｆＤｉｃｒａｔｅｒｉａｉｎｏｒｎａｔａ．￥ＷａｎｇＸｉａｎａｎｄＬｉＷｅｎｑｕａｎ（ＲｅｃｅｉｖｅｄＪａｎｕａｒｙ１２，１９９３；ａｃｃｅｐｔｅｄＭａｙ１０，１９９...     

Examining the distribution and dynamics of impervious surface in different function zones in Beijing

Impervious surface (IS) is often recognized as the indicator of urban environmental changes. Numerous research efforts have been devoted to studying its spatio-temporal dynamics and ecological effects, especially for the IS in Beijing metropolitan region. However, most previous studies primarily considered the Beijing metropolitan region as a whole without considering the differences and heterogeneity among the function zones. In this study, the subpixel impervious surface results in Beijing within a time series (1991, 2001, 2005, 2011 and 2015) were extracted by means of the classification and regression tree (CART) model combined with change detection models. Then based on the method of standard deviation ellipse, Lorenz curve, contribution index (CI) and landscape metrics, the spatio-temporal dynamics and variations of IS (1991, 2001, 2011 and 2015) in different function zones and districts were analyzed. It is found that the total area of impervious surface in Beijing increased dramatically during the study period, increasing about 144.18%. The deflection angle of major axis of standard deviation ellipse decreased from 47.15° to 38.82°, indicating the major development axis in Beijing gradually moved from northeast-southwest to north-south. Moreover, the heterogeneity of impervious surface’s distribution among 16 districts weakened gradually, but the CI values and landscape metrics in four function zones differed greatly. The urban function extended zone (UFEZ), the main source of the growth of IS in Beijing, had the highest CI values. Its lowest CI value was 1.79 that is still much higher than the highest CI value in other function zones. The core function zone (CFZ), the traditional aggregation zone of impervious surface, had the highest contagion index (CONTAG) values, but it contributed less than UFEZ due to its small area. The CI value of the new urban developed zone (NUDZ) increased rapidly, and it increased from negative to positive and multiplied, becoming an important contributor to the rise of urban impervious surface. However, the ecological conservation zone (ECZ) had a constant negative contribution all the time, and its CI value decreased gradually. Moreover, the landscape metrics and centroids of impervious surface in different density classes differed greatly. The high-density impervious surface had a more compact configuration and a greater impact on the eco-environment.     

1990~2013年河南省县域人口、经济和粮食生产重心的迁移轨迹与耦合特征——兼议与社会剥夺的关系

基于社会剥夺理论,利用重心计算及空间耦合分析模型,研究了1990~2013年河南省县域人口重心、经济重心、粮食生产重心动态迁移及其空间耦合,并探讨其与社会发展水平之间的关系。结果表明：23 a来河南省经济、人口及粮食生产重心均在省域几何重心北部变动,空间错位格局日趋显著,变动一致性波动剧烈;2000年前人口重心与粮食重心耦合度较高,2000年后粮食重心与经济重心明显呈东南-西北路径背向偏离,粮食生产对经济重心迁移的影响持续下降,而人口重心与经济重心耦合度逐步提升;传统农区社会发展严重滞后于经济增长水平,粮食主产县区的“粮食与民生倒挂”特征显著。     

Development and application of a GIS-based artificial neural network system for water quality prediction: a case study at the Lake Champlain area

Journal of Oceanology and Limnology - Artificial Neural Network (ANN) models have been extensively applied in the prediction of water resource variables, and Geographical Information System (GIS)...     

济南西北部碳酸盐岩热储特征研究

济南市作为"中国温泉之都",其地下赋存丰富的地热资源,近年来随着地热资源广泛开发利用,产生了良好的生态和环境效益。为了查明济南西北部碳酸盐岩热储地热地质特征,采用地热地质调查、物探、地热钻探、产能测试以及样品测试分析等手段,对区内碳酸盐岩热储地质条件、热储特征、地温场特征以及水化学特征等进行分析研究,查明了区内碳酸盐岩热储层主要为寒武纪和奥陶纪灰岩,热储顶板埋深400~700m,燕山晚期岩浆岩侵入活动及地壳运动形成的一系列断层和裂隙,沟通了深部热源,为地热水的富集和运移提供了空间和通道,热储层岩溶裂隙发育,单井涌水量可达2400~2640m^3/d,水化学类型为HCO3-Ca·Mg型和HCO3·SO4-Ca·Mg型,矿化度为345.00~531.11mg/L,属于淡水,水中含有较为丰富的对人体健康有益的微量元素,锶含量达到饮用天然矿泉水标准,可命名为含锶型天然饮用矿泉水。区内地热水和矿泉水综合开发将大大提高开采利用价值,为地方合理规划和可持续开发提供科学依据。