基于支持向量回归的图像复原方法研究

针对退化图像复原问题,提出了一种基于支持向量回归的退化图像复原方法.该方法利用支持向量机回归算法非线性映射能力,通过训练样本对的学习训练,在退化图像与原始清晰图像之间建立映射关系,然后对测试样本进行复原.实际图像复原实验表明,得到的复原图像在视觉上和定量分析上都获得了比较好的效果.与神经网络方法相比,支持向量机回归算法克服了神经网络的模型选择与过学习问题、局部极小问题等.     

铁路路域生态系统构建分析研究

对国内外路域生态系统的研究现状进行了总结。按照铁路生态防护类型、环境影响评价和铁路路域微环境的状况,对铁路路域生态系统进行分类,并对其结构、功能进行了分析。提出了南、北方区域铁路路域生态系统构建的对位配置,干旱、半干旱区域的生态系统生境构建体系和脆弱生态区的保护性构建模式。     

某快速路附属雨水地道泵站工程设计案例分析

地道雨水的积水问题是城市积水问题的主要成因之一。对其汇聚的雨水进行收集和排放的最理想方式是在合理的可征用土地范围内建造单独使用功能的地道雨水泵站,并同时在周边寻找到可以有效收纳其排放雨水的相关河道。本工程的实施为当地新建快速路下穿涵洞的雨水及其周边地下水提供了为其服务的雨水地道泵站的建设思路。同时其泵站庭院内部各类给排水管线的实施及其上下游出路的选择也是本工程值得借鉴的因素。     

浅谈山区公路的边坡防护及绿化设计

尽量保护自然景观是山区公路建设中的重要环保问题之一。文中以阳春市S369公路为例，重点分析了山区公路边坡稳定性、边坡防护、生态恢复和景观美化，以保证公路的边坡稳定和保护沿线的自然景观。     

A Novel Method for Detection and Removal of Line Scratch in High Resolution Digital Film

Introduction For at least one decade a need for automaticrestoration of degraded film has been growing.The classical film restoration is based on specialcopying machines to improve the quality of safe-keeping copies.However,such techniques do notpermit the removal of all kinds of degradations be-cause the unit of manipulation is always the physi-cal filmstrip.With the help of digital imagesequence's processing techniques the restorationprocess can be adapted for each frame,each pixeland also f…     

“城市双修”背景下城市水系自然净化的技术研究

“城市双修”是指城市修补和生态修复。其中生态修复是建设健康、美丽城市的基础,旨在保护自然资源、修复生态环境、推进海绵城市建设。基于此,运用“城市双修”的理念,对安徽省亳州陵西湖公园进行以城市修补和生态修复为内容的“双修”治理,包括截污清淤、污泥治理、净化水质、水质维持、低影响开发等治理措施。以此来提升城市形象,优化自然环境。     

The Elliott Bay/Duwamish restoration program: A status report

Injuries to natural resources from the release of hazardous substances into aquatic environments have led to hundreds of millions of dollars in compensatory damages awarded under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and other legislation. The institutional mechanisms for negotiating and carrying out the terms of CERCLA natural resource settlements are still in their infancy, and each case has a unique set of injuries, assigned damages, payout schedules, trustee council membership and operating procedures, and environmental conditions and constraints. One of the settlements that has made significant progress toward large‐scale habitat enhancement has occurred in Elliott Bay, a busy, seriously impacted urban harbor in Washington State. The Elliott Bay case is unique among natural resource injury settlements because of the active involvement of two local governments, the City of Seattle, and Metro, who were named as defendants in a lawsuit brought by the National Oceanic and Atmospheric Administration (NOAA) on behalf of the natural resource trustees of Elliott Bay. Both local governments have maintained, and continue to operate, outfalls that discharge into Elliott Bay, and both entities were subject to attempts to recover damages under CERCLA. Following the filing of the lawsuit over injuries to the natural resources of the estuary, alleged to have resulted from the operation of these outfalls, the parties involved negotiated a consent decree settlement. The Elliott Bay/Duwamish Restoration Program has established a process to redress some of the injuries that were attributed to the operation of these outfalls.     

It's a Wonderful Coast or,Every Time a Bell Rings,Long Island Sound is Protected

In Frank Capra's classic film It's a Wonderful Life, a despondent man takes a journey to see what life would have been like without him: the journey paints a bleak picture. In true Hollywood form, he is ultimately reassured of his impact even though his accomplishments were immeasurable. The film's protagonist, George Bailey, is the perfect metaphor for Connecticut's Coastal Management Program. The Program can measure quantifiable elements: the number of site plans reviewed, number of permits issued, acres of tidal wetlands restored. But coastal managers often lose sight of the accomplishments and ripple effects of management, possibly because accomplishments are taken for granted. Perhaps the true value of coastal management programs lies in that intangible, immeasurable idea of what coasts would be like without them.

This article takes readers on a George Bailey–esque journey by identifying the Connecticut Coastal Management Program's accomplishments since its adoption in 1980, reviewed in the context of several questions: What if the Program had never been adopted? What would public access look like? How many acres of tidal wetlands would be lost to development or Phragmites invasion? Hopefully, the results of the exercise will put coastal management into better context and highlight the successes.     

张承高速公路施工场地生态恢复条件评价

在对张承高速公路施工现场生态环境现状进行调研的基础上,提出了项目区的生态环境等级。阐明了土壤类型,适宜生长的植物;对水土流失现状进行了分析、评价,提出了水土流失防治标准;评定出项目所在地的各项生态环境指标均处于三级水平,已达危险边缘,必须采取强有力的治理措施,在高速公路建设过程中,尽快恢复较好的生态环境。     

Clean Water Act Section 404 and Coastal Marsh Sustainability

The “no net wetland loss” goal has not been met in urban coastal regions where conditions continue to exacerbate wetland losses. Under the Clean Water Act (Section 404) the U.S. Army Corps of Engineers and U. S. Environmental Protection Agency share responsibility for regulating placement of fill material in wetlands. The `no discharge of fill' rules threaten coastal wetlands with continuing losses due to effects of changing climate, including rising sea levels, higher storm surges, and flooding. Where inland migration is limited by development, or where sediment accretion rates are lower than the rate of sea level rise, urban wetlands will be lost unless marsh topography is elevated. We explored regulatory and design approaches in recent Hudson-Raritan Estuary (HRE), San Francisco Bay Estuary and coastal Louisiana restorations, including creation of new marshland using dredge material. Questions related to sea level rise, ecological position within the landscape, or potential effects of extreme storm events were not addressed in the HRE restoration designs; these concerns were taken into account in other regions. We suggest benefits of marsh `replenishment' should be acknowledged in Federal regulatory policy and that consistent policies supportive of low-lying coastal marsh preservation in all regions should be enacted.