桑沟湾栉孔扇贝人工养殖探讨

本文根据已形成的高密度超负荷养殖现状提出解决的办法,重点论述了在高密度养殖区内提高产量,缩短成贝回收期行之有效的几个环节.在养殖生产中由较为普遍的“粗放经营”改为“精管细养”才能达到理想的效果.     

公用微机硬盘信息保护的一种有效方法

介绍一种保护公用微机硬盘信息的有效方法．不仅可以预防各种计算机病毒，更重要的是可以防止人为操作对硬盘信息的破坏。适用于学校等开放性微机实验室的信息安全与保护．     

高效铝合金牺牲阳极的研究

在铝中添加合金元素Zn,Mg,In,Ga,Ca,利用正交设计方法,研制出一种高效的铝合金牺牲阳极,它在海水中的电流效率达95.6％,电位为-1.09V(SCE)。并研究了合金元素In,Ga,Ca对铝合金电化学性能的影响及阳极活化机理。     

贻贝育苗中不同饵料的饲养效果比较

培育双壳类软体动物幼苗所需的饵料，是指池内培育阶段适合于幼虫和幼苗(壳长一般在1mm以下)的饵料。育苗成功的关键问题之一为是否已经选择到这样的饵料。自40年代找到适宜的饵料生物以后，双壳类幼虫的培养才取得较明显的成效。以往利用过的一些饵料生物巳有文献系统记载。我国贻贝人工育苗是在分离与培养出扁藻以后才获得成功的。随着研究工作的深入以及适应各种不同情况的需要，采用的饵料种类越来越多样化。从生产性育苗特别是多茬育苗考虑，必须因地制宜地筛选出一定种数的饵料，以便在不同培养条件下有机动选择的余地。同一时还应找出适宜的投饵数量，以求取得较好的育苗效果。为此目的，我们于1975-1978年结合生产性育苗的需要进行了一些饵料饲养实验。本文根据实验结果以及多年来生产性育苗的实践，对贻贝育苗的饵料问题进行总结，侧重于不同饵料的饲养效果比较。     

Theoretical wind wave frequency spectra in shallow water

The method developed by Wen et al. (1988 a) for deriving theoretical wind wave frequency spectrum in deep water is extended to the case of water of finite depth, in which a parameter η=H/d is introduced, where H and d represent the average wave height and water depth respectively. The derived spectra reduce to those in deep water when η=0. The case of η=1/2 corresponds to waves impending to break because of the effect of the bottom. Simplified forms of spectra are given. The theoretical results agree with the observed spectra well.     

Numerical Analysis of Wave Forces on Arbitrarily Shaped Multi-Pillars Over Varying Topography

The modified hybrid element method (MHEM) is utilized to predict and analyze wave forces on arbitrarily shaped multiple bodies. This method can be applied to waves of all water depths, i. e. shallow, intermediate, and deep waters, on slowly varying seabed. The MHEM employs the ICCG method to save CPU and storage, thus the computation of wave forces for large multi-body systems can be carried out on microcomputers. Numerical results of the present method are compared with experimental data and other solutions. It is shown that the MHEM provides more accurate solutions of the wave forces than other numerical methods do. Therefore, the methodology presented herein can be used in the design of coastal and ocean structures.     

秦山核电站邻近水域浮游植物的生态研究

本文分析了秦山核电站邻近水域生态零点调查四个航次的浮游植物样品,结果表明:调查区浮游植物的种数和细胞密度在时间尺度上均存在明显的季节变化趋势:夏大于秋大于春大于冬,并且与环境因子的变化密切相关,其中最主要的影响因子是温度、盐度和径流,而影响日变化的环境因子主要是潮汐。     

Morphology, reproduction, ecology and isoenzyme electrophoresis of Capitella complex in Qingdao

-Morphology, reproduction, ecology and isoenzyme electrophoresis of a Capitella complex in Qingdao were examined from 1983 to 1984. We determined that the Capitella complex in Qingdao was composed of at least three sibling species: Capitella cf capitata, Capitella sp. I and Capitella sp. IT. Although these three species are very similar in morphology, they differ in: three kinds of isoenzyme electrophoresis, staining reactions, developmental pattern, larval morphology and dispersal, reproductive strategies, breeding season and population ecology. In addition, they show a series of minor quantitative variations in adult morphology, especially in number and morphology of setae. Such differences can be detected only at the population level. Some ecological data such as density, growth rate, mortality and sex distribution are also provided in this paper.     

Experiments in numerical modelling of the Pacific sea surface temperature anomalies

By using the atmosphere-ocean coupled model (CGCM) which is composed of a 2-level global atmospheric general circulation model and a 4-layer Pacific oceanic general circulation model developed in the Institute of Atmospheric Physics of Chinese Academy of Sciences, and two model climatological fields got from the two independent models' numerical integrations respectively, the Pacific sea surface temperature anomalies (SSTA) from 1988 to 1989 are simulated in this paper with observed atmospheric general circulation data and sea surface temperature fields as initial conditions and monthly coupling scheme. In order to remove systematic biases of the model climatological fields, interaction variables between atmosphere and ocean are also corrected simultaneously. The experiments show that the simulation results can be improved effectively if these interaction variables are corrected in spite of the fact that there always exist systematic biases in independent numerical simulations of atmospheric part and oc     

Species composition and distribution of marine nematode community in the North Taiwan Strait

I~IOW~ne nelnatode is a ban gIOup of benthic OrgAnsrns. Abbot 5 000 spotes Of free-livingnelnatedes have ben dedbo so far, and it has ho estimated that abbot 20 (XX) are as yetunknoWn. Chinese bothologist has Paid attention to marine nelnatodes in China seas in yare. The spatial distribution and shoes commotion of marine nelnatedes in the HUanghe EstUary, Qinhuangdao waters, QingdaO Bay and Xiamen ~ have ho reported (Zhang etal., 1990, 1991, 1993; ac and Li, 1998). ~ new shoes in the…