Monitoring and Evaluation of Present Situation of Environmental Quality in the Sea Area near the Aojiang Estuary in Wenzou

Based on the monitoring results of environmental quality in the sea area near the Aojiang estuary in Wenzou during 2010-2012,the present situation of environmental quality in the sea area was analyzed and evaluated. The results show that p H,DO,CODMn,petroleum,and heavy metals( Cu,Pb,Zn,Cd,Hg,As and Cr) in the sea area near the Aojiang estuary did not exceed the second-class standard of Seawater Quality Standard( GB 3097-1997),but both inorganic nitrogen and reactive phosphate in the sea area exceeded the second-class standard seriously,and the water quality of the sea area was in an eutrophic state; domestic sewage and fertilizer loss were the main sources of nitrogen and phosphorus. The standard index of most evaluation factors of sediment quality except for Zn was smaller than 1,meeting the demands of sediment quality for environmental protection.

A Functional Analysis of The old Man and the Sea

The present paper is a stylistic analysis of the novel The Old Man and the Sea from functional perspective.It places context of situation and modified transitivity into stylistic analysis.The paper aims to put functional linguistics into practice and offer a new insight into the novel.It first gives a situational description of the novel and collects the data accordingly,and then analyzes the materiality of the samples in detail.By comparing the four samples,the paper first works out the plot,which is considered congruent with the principle of data collection;and then it discovers double levels of literary themes of the novel——A man may be destroyed but not defeated on one level,and the relationship between human being and non-human being on the highest level.

Development strategies for the sea cucumber industry in China

The sea cucumber, Apostichopus japonicus, is an important marine aquaculture species in China. After nearly thirty years of development, the production of A. japonicus has become commercially lucrative and successful. In this report, current advances in sea cucumber industry are addressed in terms of the basic biology, culturing methods, and health care bene?ts. Next, the challenges restricting development of the sea cucumber industry are discussed, including weaknesses in the basic biological research, the problem of germplasm degradation, environmental stress caused by global climate change, and food safety problems. Finally, several strategies are presented that might contribute to sustainable development of the sea cucumber industry. These strategies include advances in genome studies, behavioral studies, selective breeding, ecological culture technologies, reforms in food safety management, and the development of health care functions based on contemporary medical practices. Thus, our work provides new insights into how to explore the sustainable development of the sea cucumber industry in the future.

Springtime migratory restlessness and departure orientation of Great Knots(Calidris tenuirostris)in the south compared to the north Yellow Sea

Background: The motivation of birds to proceed with migration is associated with both endogenous and exogenous factors. According to their migratory situation and to the characteristics of stopover sites, birds might exhibit migratory motivation differently among sites. Although migratory motivation of migrating birds has been well studied in many species, the investigation of the same species in different migratory situations and at different stopover sites is still limited. We predicted that birds at different stopover sites could differ in migratory disposition, including expression of migratory restlessness and responses to environmental cues.Methods: Here we compared migration motivation and orientation of Great Knots(Calidris tenuirostris) at two stopo ver sites, Chongming Dongtan in the south Yellow Sea, which is a temporary rest site, and Yalujiang Estuary Wetland in the north Yellow Sea, which is a critical refuelling site, during northward migration. Modified Emlen funnels, with thermal paper inside to record scratches of the birds, were used to detect activity(intensity and direction) of birds. Environmental conditions, including wind direction and speed, cloud cover, tide condition, times of the day(before and after sunset) were recorded during experiments. Generalized linear models were used to detect the effects of endogenous and exogenous factors on the migratory motivation of the birds.Results: In the south Yellow Sea, the migratory activity intensity of Great Knots was positively related to wind assistance. In the north Yellow Sea, where birds exhibited higher intensity of migratory activity than in the south, the intensity increased and the motivation to initiate migration grew stronger as the season advanced. The Great Knots exhibited wind-related orientation behaviour in the funnels at both sites.Conclusions: The results suggest that the intensity of migratory motivation differed between the two sites. Departure decisions of Great Knots appear to be affected mainly by external factors at the temporary rest site in the south Yellow Sea but possibly by endogenous factors at the final pre-breeding refuelling site in the north Yellow Sea.

Sea battle-filed simulation based on Vega

To study battle-field simulation methods based on Vega,a virtual battle-field simulated by an imaginary combat happened on the sea was designed. The simulation framework in the sea battle-filed included helicopter simulation,fire simulation, collision detection and detonation, and simulation of dynamic sea surface. The method to build the simulation environments and actions to them was discussed. And the simulation experiments were conducted.,It is indicated that the simulated sea battle-field based on Vega is feasible and helpful for forces and battle-field.

The climate background and synoptic situation of fog at Great Wall Station,Antarctica

Based on the observed and NCEP reanalysis data from 1985 to 2006, the climate background and synoptic situation of fog at Great Wall Station were analyzed.It is shown that the seasonal variation of fog is controlled by the change of general circulation and local pressure field.Three favorable typical synoptic situations for fog development arc found,the Front-of-A-Depression type,the Saddle-Shaped-Field type and the Passing-Weak-Cyclone type.The first one is the most important situation.Advection cooling fog is dominant at Great Wall Station,but there are other kinds of fog as well.As a result,some helpful principles for local fog forecasting are given.

典型入海河流水环境状况分析及治理对策研究

入海河流携带的污染物已成为近岸海域生态环境恶化的主要原因之一。为改善近岸海域水质,强化海陆统筹,以饮马河作为研究对象,基于流域水环境的调研情况,分析2021年-2022年监测数据,找出现状河道存在的问题,探索入海河流的综合治理模式,针对性提出了控源截污、内源治理、生态修复及河道管理的具体措施,以降低入河污染物、提高水环境容量、恢复流域生境、加快生态系统自我恢复,实现河流水环境的长效保障,同时也为相关流域治理等提供思路。

台州湾多海岛海域50 a一遇极端情况波浪数值模拟研究

基于MIKE 21 SW模块建立了该区域的波浪数学模型,分析了台州湾海域50 a一遇极端情况下的波浪分布特征。结果表明:多海岛地形形成了天然的避风港,各岛屿的背波面波高较小,极端高水位作用时波高均减小至4.2~5 m之间;岛屿一字排开,导致在相同极端风速度的情况下不同风向的影响也不同,其中ESE~SE向来风的影响最大;近岸海域受岛屿阻挡作用和风向影响,流向发生偏转。

数字化海战场态势表现系统研究

随着数字地球、三维建模与表现技术的飞速发展,针对军事指挥现状和存在的问题,提出了海战场态势表现系统框架,并重点讨论了三维态势表现中涉及到的海洋表面建模、队形及队形变换建模及表现等关键技术,设计并实现了一个态势表现系统,能提供在数字地球平台上的三维态势表现。实验表明,在保证场景绘制质量的前提下,该系统能够在目前普通的PC上实现大规模海战场态势的实时显示和交互操纵。

大型深水抗风浪网箱的发展现状和鱼类养殖技术

近年来我国研制的、科技含量较高的、用于海水养殖的大型深水抗风浪网箱,能促进我国海水鱼类养殖可持续性发展。同时,利用深水网箱养殖已成为开发和利用海洋的海水养殖支柱产业。

初春南黄海水文特征及环流状况的分析

根据1996年初春中韩黄海水循环动力学合作调查所获资料，分析了南黄海水文特征及其环流状况，并获得了以下几点主要认识：（1）初春南黄海的温、盐分布特征及环流基本形态，与以往所揭示的冬季状况基本相似．然而，本次调查发现，在30m以浅，黄海中部暖水舌轴线比冬季的明显偏东；且出现一范围较小的孤立的相对高温高盐区．在垂向，一种中层冷水和表层逆温跃层现象出现在黄海局部区域．（2）直接测流的结果，不仅部分地印证了由温、盐场所显示的环流基本形态，而且较好地揭示了流场中发生的一些新现象，其中尤其是绕济州岛的流动．（3）黄海暖流水是对马暖流水和陆架水混合而成．而且，它主要是在济州岛西侧水域，从锋带中衍生出来的．

东海区主要渔业资源利用状况的分析

本文根据东海区渔业资源调查和区划、东海大陆架生物资源与环境和全国渔业统计年鉴等资料，统计1956～2002年东海区捕捞品种中经济价值较高、在渔业中占重要地位的11个种类的产量，并利用数理统计学上的主成分分析方法，分析研究了东海区11个主要捕捞种类历年来的资源变动特征、资源利用状况及其变动趋势。结果表明：11个主要捕捞种类的渔业资源状况可分为3种类型，分别为过度捕捞已严重衰退的资源、充分利用并开始衰退的资源和尚有潜力的资源，其中大黄鱼、鳓鱼资源已进入资源衰退期，带鱼、鲐鲹鱼类、墨鱼和小黄鱼等处在充分利用并开始衰退期，虾蟹类、鲳鱼、马鲛鱼、鲷科鱼类和海鳗等资源尚有潜力。

海南三亚湾海域水质状况评价

本文根据 1 998年 1 0月至 1 999年 8月海南三亚湾海域水质监测结果 ,分析了各水质参数的周年变化 ,在对各水质参数进行污染指数计算的基础上 ,应用水质综合评价模式 ,对该海域进行水质评价 .结果表明 :(1 )受河口和港口高含量测值的影响 ,三亚湾海域水质呈现轻度污染状态 ,河口水质已接近严重污染 ;(2 )除重金属Pb外 ,该海域其它水质参数均未超出一类海水水质标准 .(3)降雨和径流为三亚湾海域水质参数变化的控制因子 .

海战场电磁态势感知模型

复杂电磁环境对海上作战和频谱管控提出了更高的要求,准确感知战场电磁态势是指挥控制、频谱管控的重要基础,但目前尚没有系统生成海战场电磁态势的方法。在分析传统态势感知模型的基础上,定义了战场电磁态势的相关概念,提出了海战场电磁态势感知的基本模型,深入分析了电磁环境感知、电磁环境构建、电磁态势理解、电磁态势展现等模型中的重要环节,并提出了初步技术解决途径,为进一步分析和评估海战场电磁态势提供了基础。

2007-2018年黄渤海海冰气候特征及其对气象因子的响应

基于美国国家冰雪数据中心(NSIDC)海冰资料、美国国家环境预报中心(NCEP)再分析格点数据和黄渤海近岸13个气象站点逐日气温数据,通过相关分析和合成分析,研究了2007-2018年黄渤海海冰范围的变化特征,探讨了近12年黄渤海海冰范围对近岸陆地气温、大气环流和局地天气过程的响应。结果表明:(1)黄渤海海冰范围年际振荡明显,近12年呈现先增加后减小的趋势,与同期黄渤海近岸气温呈显著负相关关系;每年1月下旬至2月下旬是一年中海冰范围最大的时期。(2)海冰范围偏大与偏小年份东亚地区500 hPa大气环流形势呈现出近乎相反的分布。(3)东亚阻塞形势的建立是黄渤海海冰范围爆发性增大的一个前兆信号,它带来的大风降温天气是造成黄渤海海冰范围爆发性增大的重要原因。

我国深远海大型围栏养殖发展现状与展望

深远海大型围栏养殖是我国海水养殖业结构调整和产业升级中新兴的养殖模式之一,具有养殖面积大、鱼类活动空间大、养殖环境更近自然和养殖鱼类品质明显提升等特点。本文在介绍围网养殖发展概况、深远海养殖内涵的基础上,重点概述了我国深远海大型围栏养殖发展现状及其研究进展,并对今后的发展方向加以展望,为我国深远海大型围栏智能化生态养殖模式的构建提供参考。

海战场态势实时三维显示系统研究与实现

针对当前舰载指挥控制系统只能基于二维图形、图标显示战场态势的问题,提出和开发了基于UDP的海战场态势实时三维显示系统,将虚拟现实技术应用到作战指挥控制系统中,用三维视景实时显示战场态势变化过程、战场态势发展以及双方兵力对抗过程。系统对战场实体位置进行了从经纬度坐标到直角坐标的转换,并为战场实体建立了简单的行为模型。为满足实时渲染和实时显示的需要,系统对模型、场景范围、显示方式等都做了优化处理,减少计算量,同时减少对硬件的依赖。

我国东部沿海海平面变化研究现状及问题

海平面上升对人类生存环境有着重大影响。综述性地介绍了中国东部沿海海平面变化研究现状及存在问题,并指出了研究方向。

海上医疗卫生装备的现状与探讨

介绍了国内外海上医疗运载平台,探讨了海上医疗卫生装备的功能特点,分析建设发展中的存在问题,提出解决的意见建议。指出应从加强研发、制订专业标准、统一行业规范等3个方面对海上医疗卫生装备进行改进,提高装备保障效能。

我国海域基础地质调查现状与问题

我国海域基础地质调查始于1958年,主要开展了大陆架及邻近海域勘查与资源评价、油气资源调查以及其他海洋地质地球物理调查,取得了一批非常宝贵的基础资料和成果。在整理我国海域基础地质调查现状的基础上,分析了存在的问题,并结合目前和未来一段时期内我国社会经济建设和海洋开发对海域基础地质调查工作的需求,提出了相应的对策与建议。