海洋磁力测量中测线方向的选择方法

采用测线间磁异常插值精度分析了测线方向对磁测的影响;探讨了测线方向的选择方法,结合我国不同海区磁异常分布特征给出了不同海区测量时测线方向的选择详细方案。结论表明:海洋磁力测量中,测线方向对磁异常插值精度的影响不大,但是为了获得更高的磁异常插值精度,测线方向应尽量沿磁异常梯度方向布设。给出的测线方向的选择方法和我国不同海区测线方向选择详细方案可供作业人员参考。     

WebGIS及网络发布探讨

阐述了WebGIS的特点：开放性、互操作性和分布性;广泛的客户访问范围;良好的可扩展性和平台独立性。简明介绍了网络GIS的实现技术,探讨了如何使用ASP语言实现网络发布的方法,并给出了部分代码,提出了今后WebGIS发展趋势：动态仿真、虚拟现实与WebGIS的结合;移动通信技术与GIS的有机结合;开放式地理信息系统;基于网格计算的新一代WebGIS。     

Theoretical Model and Dynamic Analysis of Soft Yoke Mooring System

As a popular solution for mooring an FPSO （Floating Production, Storage and Offloading） permanently in shallow water, the soft yoke mooring system has been widely used in ocean oil production activities in the Bohai Bay of China. In order to simulate the interaction mechanism and conduct dynamic analysis of the soft yoke mooring system, a theoretical model with basic dynamic equations is established. A numerical iteration algorithm based on error estimation is developed to solve the equations and calculate the dynanfic response of the mooring system due to FPSO motions. Validation is conducted by wave basin experimentation. It is shown that the numerical simulation takes only a few iteration times and the final errors are small. Furthermore, the calculated results of both the static and dynamic responses agree well with those ones obtained by the model test. It indicates that the efficiency, the precision, the reliability and the validity of the developed numerical algorithm and program are rather good. It is proposed to develop a real-time monitoring system to further monitor the dynamic performance of the FPSO with a soft yoke mooring system under various real sea environments.     

褐菖鲉网箱养殖试验初报

2001年4月30日在浙江南麂海域3 m×3 m×3 m网箱中放养0.9 g自然海区捕获的褐菖鲉(Sebastiscus marmoratus)苗种,进行为期2年多的养殖试验.结果表明,该鱼生长缓慢,养殖38 d体质量为8.3 g,养殖240 d为24.8 g,养殖787 d为112.3 g.总养殖成活率为20.1%,平均日增体质量0.142 g,平均日增体质量率0.62%.秋末至夏初低水温期是褐菖鲉的主要生长期,在9～13℃较低水温下亦会摄食与生长.饵料系数为3.6.冬春季养殖成活率高于秋夏季,第一年夏季养殖成活率低,仅28.1%.养殖方式以混养为宜.     

宽壳全海笋的染色体核型分析

以宽壳全海笋担轮幼虫为材料,采用热滴片法进行染色体核型分析.结果表明:宽壳全海笋二倍体染色体数目为2n=38,染色体臂数(NF)=70,核型公式为24m 8sm 6st,未发现性染色体和随体.与海螂目另一物种砂海螂相比,二倍体染色体数目多4条,亚端部着丝粒染色体(st)多6条,核型比砂海螂更具不对称,推测宽壳全海笋较砂海螂原始.     

海水螺旋藻C-藻蓝蛋白富硒及其抗氧化特性

对海水钝顶螺旋藻Spirulina platensis C-藻蓝蛋白的富硒能力及含硒c-藻蓝蛋白对超氧阴离子(O2·)和羟基自由基(·OH)的清除作用进行了研究.结果表明,在添加低浓度硒(40-80mg·L-1)培养时,海水钝顶螺旋藻c.藻蓝蛋白对硒的富集效果显著强于淡水螺旋藻C-藻蓝蛋白.硒浓度为40mg·L-1时,C-藻蓝蛋白对硒的利用率最高,富硒系数最大(O.9%);硒浓度为60mg·L-1时,C-藻蓝蛋白含硒量最高(402mg·kg-1).含硒C-藻蓝蛋白比CJ藻蓝蛋白对超氧阴离子和羟基自由基的清除作用都有所加强,清除效应与C-藻蓝蛋白的含硒量及蛋白浓度呈正相关.C-藻蓝蛋白含硒量最高组(402mg·kg-1)在浓度为180μg·ml-1时,对超氧阴离子和羟基自由基的清除率分别可达到83%和35%,远高于同样条件下其他淡水种类相应蛋白的清除作用.研究结果显示,利用海水培养的螺旋藻能显著提高C-藻蓝蛋白的富硒能力和含硒C-藻蓝蛋白清除超氧阴离子的活性.此研究对开发具有抗氧化功能的含硒C-藻蓝蛋白显示出独特的技术优势和较大的应用潜力.     

Characteristics and evolution of lacustrine turbidite of Chang-7 Member of Yanchang Formation in northern Shaanxi

Lacustrine turbidite of Chang-7 Member in the studied area consists of sihstone and fine sandstone with respect to grain size, which is feldspathic lithie sandstone, syrosem arkose and arkose with respect to mineral constitution affected by provenance. There are such apparent signatures as lithology, sedimentary structure, sedimentary sequence and well logs, to recognize turbidite. During the paleogeographic evolution of Chang-7 Member, lake basin and deep lake are both at their maximum extent during Chang-73 stage, resulting in the deposition of Zhangjiatan shale with widespread extent and of turbidite with fragmental-like. Deep lake line is gradually moving toward lake center and turbidite sand bodies are gradually turning better with better lateral continuity, connectivity and more thickness, from stages of Chang-73, Chang-72 and Chang-7t, which can be favorable reservoir in deep-water.     

多效唑对2种海洋微藻生长和抗氧化酶活性的影响

运用实验生态学和生物化学的方法,研究了多效唑对青岛大扁藻(Platymonas helgolandica)和绿色巴夫藻(Pavlova viridis)生长和抗氧化酶活性的影响.结果表明:低浓度(≤5 mg/L)多效唑能促进绿色巴夫藻的生长,与对照组相比,多效唑处理组的干重、叶绿素a、可溶性糖和蛋白质含量均有所增加(p<0.05),而低浓度(≤5 mg/L)多效唑对青岛大扁藻的生长无明显影响;高浓度(≥15 mg/L)多效唑可显著抑制青岛大扁藻和绿色巴夫藻的生长,多效唑处理组的干重、叶绿素a、可溶性糖和蛋白质含量均低于对照组(p<0.05).多效唑对青岛大扁藻和绿色巴夫藻的96 h-EC50值分别是28.6 mg/L和24.9 mg/L. 2种微藻经不同浓度多效唑处理后,细胞内抗氧化防御系统的关键性酶超氧化物歧化酶(superoxide dismutase, SOD)和过氧化物酶(peroxidase, POD)均表现为低浓度(≤5 mg/L)的诱导作用和高浓度(≥15 mg/L)时的抑制作用;不同浓度多效唑处理后,2种微藻细胞内过氧化氢酶(catalase, CAT)活性均降低.     

约束秩亏间接平差模型的虚拟观测算法

约束秩亏间接平差模型的法方程系数矩阵为分块矩阵,其左上角的子块矩阵秩亏,因此无法直接计算分块矩阵的凯利逆矩阵.利用矩阵运算,构建一个能直接求凯利逆的分块矩阵,进而推算出约束秩亏间接平差模型法方程系数矩阵的凯利逆的直接显性表达式.提出将约束条件看作虚拟观测,和原有的秩亏间接平差模型组合成新的误差方程,再和约束条件组成约束...