Support vector regression based color image restoration in YUV color space

A support vector regression(SVR) based color image restoration algorithm is proposed.The test color images are firstly mapped into the YUV color space,and then SVR is applied to build up a theoretical model between the degraded images and the original one.Performance comparisons of the proposed algorithm versus traditional filtering algorithms are given.Experimental results show that the proposed algorithm has better performance than traditional filtering algorithms and has less computation time than iterat...     

Effective Public Participation is Fundamental for Marine Conservation—Lessons from a Large-Scale MPA

The Representative Areas Program (RAP) was, at the time, the most comprehensive process of community involvement and participatory planning for any environmental issue in Australia. The RAP was a key component of the widely acclaimed rezoning of the Great Barrier Reef Marine Park, and although completed in 2003, many lessons learned are still relevant today. This paper provides an analysis of the comprehensive public participation program that significantly influenced the final planning outcome. It provides insights into a fundamental component of effective marine planning, assessing what worked well and what did not in terms of public engagement. Some aspects of the public participation program were innovative, and some were more effective than others. The outcome was one-third of the Marine Park was declared as highly protected no-take zones in 2004, with the remainder of the park also zoned to provide lower levels of protection. The methods used to engage the public and the 25 lessons discussed in this paper should be of interest for practitioners, policy makers and academics elsewhere aiming for “good practice” approaches to achieve environmental conservation.     

珊瑚岛礁跨海大桥的勘察实践及工程意义

针对珊瑚礁岩土的工程分类欠缺、钻探技术效果不佳、原位及物探测试手段不足以及物理力学性质评价指标及其体系需要重建等系列问题,进行珊瑚礁岩土的勘察技术研究。基于勘察实例,证明常规的技术方法多不适用于勘察珊瑚礁岩土。需集中对珊瑚礁岩土工程地质特性(如地质环境特性、动力工程环境、岩土组成及其描述、基本物理特征、力学特性、颗粒破碎特性、岩土工程评价等方面)和勘察技术(如钻探取样、物探、原位测试、室内试验等)进行研究,并不断积累经验。     

崖州湾中心渔港周边海域岸线修复工程实例

三亚市受台风、暴雨、海水侵蚀等自然因素的影响,沙滩泥化现象日趋严重,海岸线逐渐后退,草坪植被大面积陷落损毁。该市周边部分水上、陆上工程的过度开发建设等人为因素进一步加剧了海岸生态环境的恶化,使崖州湾中心渔港周边海域岸线生态环境受损。以三亚市崖州湾中心渔港周边海域岸线修复工程为例,详细介绍生态底泥疏浚及处理工程、沙滩修复工程、岸线生态修复工程、贝藻礁型丁坝工程四部分内容,完善崖州湾生态整体修复,提升海岸生态功能和防灾减灾功能,解决民生问题,为类似工程提供参考。     

岛礁陡坡地形上波浪破碎试验研究

通过波浪水槽系列模型试验对岛礁地形上的波浪破碎位置进行试验研究。试验中将岛礁地形概化为向海陡坡与水平平台相连接的模型,研究3种陡坡(1∶1. 5、1∶3和1∶5)、3种相对水深(0. 1、0. 17和0. 24)下的波浪破碎位置。结果表明,波浪相对破碎位置与Irribarren数、礁坪相对水深以及前坡坡度有关,且随Irribarren数和相对水深的增大而向岸侧移动,随坡度的变陡而向海侧移动。同时,也给出了波浪破碎位置计算方法。     

Advancing Coastal Habitat Resiliency Through Landscape-Scale Assessment

Coastal areas are among the most biologically rich regions in the world. They provide tremendous benefit to people through ecological services like pollution filtration, carbon sequestration, and storm protection. However, human activity has decreased the ability of ecosystems to provide these services, and in many coastal areas, restoration is not as effective as it could be. Limited success is largely attributed to vague goals and a lack of holistic, science-informed planning. Quantifying coastal habitat health can aid in setting better restoration goals and lead to greater restoration success. The Long Island Sound Study National Estuary Program conducted the first comprehensive look at coastal habitat health for the Long Island Sound Estuary. In this study we also reviewed landscape-scale habitat assessment progress within other coastal programs. Results can be applied to establish ecosystem health-oriented goals that improve habitat function and resilience across coastal areas.     

Designing a Network of Coral Reef Marine Protected Areas in Hainan Island,South China

Overexploitation of reef resources and increasing coastal tourism have severely damaged the health of coral reef ecosystems around Hainan Island, South China. Only some reef sites are protected, and the effectiveness of the marine protected areas (MPA) appears inadequate. Networks of MPAs have been widely proposed as a more effective tool for reef conservation. However, little is known about the overall state of the island's coral reefs, and no guidelines exist for MPA network building in China. In this study, the information currently available on the distribution and condition of Hainan's coral reefs is comprehensively used to assess reef status, and to identify other reef areas prior to protection. An MPA network around the island is proposed in terms of monitoring, legal, and management aspects to improve the conservation effectiveness. This could also serve as a model for developing MPA networks for other coastal areas with respect to coral reef conservation.     

赤水河口淤沙段航道治理试验

分析赤水河来水来沙特性、泥沙淤积和碍航特点,提出用整治建筑物、炸礁与疏浚等手段束窄滩段河宽,并通过模型进行论证。     

澜沧江三道拐河段航道整治模型试验研究

论述了三道拐河段河床复杂地形、碍航原因等情况,在认识滩性的基础上进行工程对比试验,提出了治理应以增大弯道半径和改善水流流态为主,从而保证中、枯水通航     

高速公路取弃土场与施工便道生态修复研究

高速公路的取、弃土场及施工便道如不采取有效措施加以修复,极易引起水土流失等生态破坏,文章通过总结实例研究,探讨了高速公路取、弃土场与施工便道将工程措施和植物措施相结合的生态修复技术与施工方案,对高速公路取、弃土场及施工便道的生态修复具有一定的技术指导作用。