中国渔政33511设计探析

以千岛湖内河新型渔政执法艇“中国渔政33511”为例,对设计过程中涉及的总体布置、结构、性能和特点等问题进行了初步的探讨。     

"CR-02"6000m无人自治水下机器人载体系统

“CR－02”6000m无人自治水下机器人（AUV）是基于“CR－02”6000m机器人的改进型。“CR－02”机器人的最大工作深度为6000m。它的一项重要功能是通过采用艏部垂向和横向对转槽道桨，使其具有海山爬坡能力；另一重要功能是它具有先进的测深侧扫声纳，抚仙湖的试验结果表明艏部对转槽道桨大大改善了机器人的机动性。本文简要地介绍了机器人的主要技术特性和参数、载体线型、推进系统和框架结构。     

引江济淮工程巢湖水域风浪特性研究

根据巢湖湖区附近波浪及气象资料,采用经现场观测资料验证的考虑风能输入和底摩阻影响的非线性抛物型缓坡方程波浪数学模型对巢湖水域风浪特性进行研究,所建立的数学模型可较好地预测巢湖水域的波浪场及波高分布情况。结合湖区地形及平面布置,进行全方向的波浪数值模拟计算,得出湖区波浪场分布情况,为相关工程设计提供参考。     

F湖单水听器宽带匹配场定位的快速实现

研究利用单个水听器对宽带水下声源进行匹配场定位的快速实现问题。文中提出了一种基于频域相关的匹配场定位方法，介绍了该方法的基本原理，对方法实现中的主要问题进行了讨论。然后进行了计算机模拟定位仿真，对定位性能作了初步分析，结果表明该方法在F湖是有效的。     

浅谈金沙洲居住新城市政雨水系统规划

金沙洲居住新城位于广州市白云区,在2004年经过调整的《广州市城市总体规划(2001-2010)》中,金沙洲地区被列入广州市今后重点发展的新居住区之一,规划本居住新城人口数为11.4万人。现时市政配套设施较缺乏,雨污水通过排水明渠汇集排入白沙河。综合金沙洲防洪排涝规划及现有排水现状,本文仅对金沙洲居住新城市政雨水系统进行简要概述。     

Analysis of the contribution of ice algae to the ice-covered ecosystem in Lake Saroma by means of a coupled ice–ocean ecosystem model

A new coupled ice–ocean ecosystem model that links the pelagic and ice ecosystems was used to clarify the role of ice algae in ice-covered ocean ecosystems. The model was applied to Lake Saroma (Hokkaido, Japan) in 1992. Comparison of the model's results with observational data confirmed that the model reproduced the behavior of the ecosystem with acceptable accuracy during the period from winter to spring. The primary production of the ice algae is effectively transported into the pelagic system by means of physical releasing effects: brine convection, ice melting and freezing, and diffusion generated at the bottom of the ice. Ice algae released from the ice are rapidly exported because of their high sinking speed and the shallow depth of Lake Saroma. For this reason, the zooplankton in Lake Saroma cannot graze these released algae. However, zooplankton actively graze the ice algae living along the bottom of the ice. These results show that, before their release, ice algae play an important role as a food source for overwintering zooplankton. A sensitivity analysis revealed a positive correlation between the sinking speed of the released ice algae and the magnitude of the spring bloom by pelagic phytoplankton, and that the time when secondary production becomes active is an important factor in the linkage between these two algal populations.     

鼠浪湖岛矿石中转码头工程装卸工艺关键技术分析

鼠浪湖岛矿石中转码头工程作为国内最大的矿石中转码头,可停靠40万t级的超大型矿石船。针对大鼠浪岛及周边浅滩不规整的平面形态,本文结合工程设计实例,详细分析装卸工艺关键技术。该系统具有可靠、灵活、高效,远近结合的特点,重点解决了如何将多种功能、多种流程集中转换的问题,工艺流程复杂多样,装卸设备先进合理,满足铁矿石运输船舶发展的需要,代表了最先进矿石中转码头的设计水平,对今后建设此类工程是很好的参考和借鉴。     

The role of copepods in the Baikal ecosystem

This describes a study of the pelagic zone of Lake Baikal with particular reference to copepods. In addition the cycling of matter and energy in lacustrine basins is described.     

武汉水文化研究

水文化的实质是一个国家或区域人民的优良传统和品德在水事活动中的体现,其根本理念是创造以人为本和人与自然和谐相处的境界。武汉市作为“江城”和“百湖之市”,具有独特的水文化优势,本文通过对武汉市水文化的研究,对武汉市水文化建设提出了几点建议。     

简易钢管栈桥码头在喀纳斯湖的应用

阐述了在国家级自然保护区喀纳斯湖采用简易网箱栽植钢管栈桥码头的最优选择与实用性,明确了建设简易钢管栈桥码头的关键技术问题,指出了简易钢管栈桥码头营运维护应注意的问题。简易网箱栽植钢管栈桥码头成功经验表明其具有广泛的应用前景。     

科伦坡港口城一期工程设计方案优化

针对科伦坡港口城一期工程量大、施工工序多、工期要求紧的实际情况,在满足功能需求的前提下,利用数值模拟、物理模型、相关工程案例支撑等方法进行平面及结构的设计优化,并分析优化的风险及应对措施,从源头上缩短工期及节约工程造价。优化成果已获得批准并应用于工程实施,为港口城项目顺利实施提供技术支撑。     

疏浚工程中的土工管袋技术

介绍了以疏浚土为主要填充材料的土工管袋围堰在滇池疏浚工程中的应用概况、结构设计和工程效益,并从多方面与传统的碾压土石结构相比较,指出了土工管袋技术在疏浚工程中的先进性。     

Life cycle of Epischura baicalensis Sars (Copepoda, Calanoida) in Lake Baikal

Epischura baicalensis Sars is a dominant pelagic species of Lake Baikal zooplankton. This is endemic to Lake Baikal and inhabits the entire water column. It produces two generations per year: the winter–spring and the summer. These copepods develop under different ecological conditions and vary in the duration of life stages, reproduction time, maturation of sex products and adult males and females lifespan. The total life period of the animals from each generation is one year. One female can produce 10 egg sacks every 10–20 days during its life time. The ratio of males and females is 1:1. One of the most essential features of the ecology of E. baicalensis is the alteration of its mass inhabited areas during a year, as well as in day time. This is due to the need for various conditions for gonad maturation, reproduction, nourishing and protection from being consumed by planktivors.     

多功能囤船动力照明和防雷系统的优化设计

介绍了南太湖区域一艘能容纳400-500人的集休闲、商务、娱乐、上网于一体的多功能囤船,包括船上的动力照明系统和防雷系统的设计、布线特点和技术要求等.     

基于价值工程的全生命周期趸船材质方案比选研究

将趸船整个生命周期过程中的技术先进性、经济合理性和环境协调性有机地融合为一体,基于价值工程理论提出趸船材质方法比选。实例表明在千岛湖这样的大吨位船舶碰撞概率很小的水域,采用混凝土趸船明显优于钢质趸船。     

洞庭湖区草尾河草尾至泥湾河段航道治理研究

分析了洞庭湖区草尾至泥湾58km河段滩险碍航特征和枯水河床形态特点;并根据河道枯水期水流归槽和水面比降与河床纵坡具有趋于平行的对应关系,提出航道疏浚治理原则和方案,并通过物理模型试验进行了论证。     

统筹规划构建高效水上运输体系

叙述了南太湖区域个体货运驳船空船返航率较高,在降低了资源、能源利用率的同时,也使船主的收益受到了影响,通过系统调查和统计,提出了妥善解决的办法。     

Biogeochemistry of sulfur in a sediment core from the west-central Baltic Sea: Evidence from stable isotopes and pyrite textures

The biogeochemistry of the sulfur cycle in a ca. 5-m-long sediment core from the eastern slope (221 m water depth) of the Landsort Deep in the west-central Baltic Sea was investigated by analyzing the solid phase records of sulfur isotopes and pyrite textures, besides selected main and minor elements. The sediments were deposited during post-glacial history of the Baltic Sea when the basin experienced alteration of brackish (Yoldia Sea, Littorina Sea) and freshwater (Baltic Ice Lake, Ancylus Lake) conditions. The stable isotopic composition of total sulfur was analyzed as a function of depth. In selected samples pyrite (FeS₂), greigite (Fe₃S₄), and barite (BaSO₄) fractions were separated for isotope analyses. Pyrite textures were analyzed by SEM and optical microscopy.Microbial reactions associated with the oxidation of organic matter resulted in assemblages of authigenic sulfide minerals which for the post-Ancylus Lake brackish water environment are dominated by pyrite and for freshwater environments by Fe-monosulfides. The sulfur isotopic composition of the brackish water Littorina Sea sediments (δ³⁴S between −40 and −27‰ vs. V-CDT) is believed to be determined by cellular sulfate reduction rates and reactions involving intermediate sulfur species. The availability of reactive iron and decomposable organic matter as well as sedimentation rate and the chemocline position are important variables upon the δ³⁴S values of sulfides in brackish water environment. The syn-depositional abundance of sulfur and organic matter, and transport of dissolved sulfur species vs. rates of microbial reactions determine δ³⁴S in the freshwater sediments. The upper part of the Ancylus Lake sediments is sulfidized by downward diffusing H₂S and/or sulfate from overlying brackish water sediments. Minor concretionary barite formation in the freshwater sediments is most likely due to the reaction of pore water sulfate diffusing downward from brackish water sediments with barium desorbed from freshwater sediments. The size distribution of pyrite framboids in the brackish sediments indicates that the formation mainly occurred from anoxic pore waters, although some pyrite formation in an anoxic water column cannot be excluded.     

江海直达驳运输方式研究

以武钢外矿进江运输为例,对江海直达驳运输方式的可行性进行了研究分析,得到了一些有益的结论。     

浅议航标遥测遥控系统在巢湖湖区的应用

航标是保障船舶航行安全的助航设施,通过采用航标遥测遥控系统,节省了巢湖湖区航标管理和维护成本。本文介绍了航标遥测遥控系统的基本原理和特点,提出一些改进措施,建议在—定范围内推广应用。