渔网防污技术及应用

根据不同的防污机理，渔网防污技术可分为化学防污、物理防污及生物防污等。其中，目前最常用、最有效的渔网防污技术是化学方法中的涂覆防污涂料。本介绍了各类防污技术，描述了现有渔网防污涂料的发展历程、最新研究进展及应用情况，并展望了渔网防污技术的发展趋势。     

玻璃钢渔船产业化的发展与推广

本文对国内外玻璃钢渔船的发展进行了分析,并探讨了我国玻璃钢渔船的发展与推广措施。     

螺杆钻具井下事故的处理与预防

总结归纳了螺杆钻具现场使用常见的井下事故类型，简要分析了各类事故的发生原因，并提出了相应的处理方法及预防措施，为现场处理并控制类似钻具事故提供了借鉴。     

常规打捞工具在水平井中的应用

水平井打捞技术一直是修井作业的难点，在缺乏配套打捞工具的情况下，LSIH井采用常规打捞工具，在保证井眼规则的基础上，利用母锥、卡瓦捞筒复合打捞出井内落物，为水平井打捞积累了经验。     

水力内割刀与可退式捞矛在打捞深孔事故钻杆中的应用

采用水力式割刀分段割断事故钻杆,可退式捞矛捞取事故钻杆的处理方法,快捷、安全、经济地处理了招远栾家河金矿区47ZK3孔深孔跑钻事故。结合该工程实例,介绍了水压式割刀和可退式捞矛的使用方法,并与传统的反丝钻杆和丝锥锥捞处理方法进行了比较。     

渤海I27H井406.4mm大尺寸井眼对扣打捞技术

钻具落井是石油行业典型的井下事故,一般需要耗费较多的时间和人力、物力来处理,直接影响着油井的命运。通过细致的钻具探伤、检查,保证入井钻具状态良好是预防事故发生的主要手段。但是由于一些客观因素的影响,钻具落井事故仍时有发生。渤海油田某井表层406.4 mm井眼钻井过程中发生的底部钻具脱扣落井便是此类事故的典型。在对该井基本情况和事故发生的经过做了简单介绍的基础上,对中浅层大尺寸井眼钻具落井的打捞难点做了说明,给出了可行的打捞方案,最终成功打捞出了落井钻具。     

You can’t just use gold: Elevated turbidity alters successful lure color for recreational Walleye fishing

Increasing anthropogenic turbidity alters underwater visual environments, leading to disrupted perception of visual cues with a variety of consequences, such as diet shifts and reduced prey consumption. In this study, we used novel techniques, including a citizen science mobile phone application (app), to investigate the effects of altered water clarity on recreational fisheries. Our objectives were to determine if elevated turbidity (suspended sediments or algae) alters lure success in the recreational Walleye (Sander vitreus) fishery and if the behavior of recreational anglers shifts with algal blooms. We developed a mobile phone app to gather real time data on lure success across water clarity conditions in collaboration with Lake Erie charter captains. Citizen science data collected with the app showed that lure color success shifted with water color and clarity: white lures were most successful in clear water, yellow in sedimentary turbidity, and black in algal conditions. A survey of charter captains suggested that fishing practices and lure usage may change over the long term if algal blooms persist.     

Magnetic fishing of recombinant green fluorescent proteins and tagged proteins with designed synthetic ligands

Biomimetic ligands have emerged to overcome disadvantages inherent in biological ligands. In particular, the Ugi reaction can generate scaffolds where molecular diversity can be introduced, allowing the synthesis and screening of ligand libraries in a high-throughput manner against a variety of biological targets. Two adsorbents bearing Ugi-based synthetic ligands, coined A4C7 and A7C1, were previously developed for the selective recovery of green fluorescent protein (GFP) and RKRKRK-tagged GFP directly from Escherichia coli crude extracts. This work describes, for the first time, the in situ synthesis of Ugi-based ligands on magnetic beads and their application in the magnetic recovery of cognate proteins.     

Sustainable fisheries management in the Great Lakes: Scientific and operational challenges

Fisheries managers seek to sustain Great Lakes' fish populations in a large, complex lake‐watershed ecosystem responding to often competing issues: non‐indigenous species, resource allocation and environmental quality. Within the past 200 years, human activity has caused dramatic changes in the character of this ecosystem. Before the 1900s, the offshore fish communities in each of the Great Lakes were dominated by the piscivorous lake trout and burbot. The current fish fauna of the Great Lakes' basin includes 179 species representing 29 families in 18 orders and two classes of fish. Twenty‐five non‐indigenous fish species have established populations in the Great Lakes' ecosystem. Sustainable management of Great Lakes' fisheries depends on social, economic and ecological factors. Hundreds of millions of dollars are spent annually to protect and preserve Great Lakes' fisheries and their associated ecosystems. Management of Great Lakes' fisheries on a species‐by‐species basis is pointless. Recreational fishing provides larger economic benefits on the Great Lakes, compared to commercial fisheries. Further, quota management, even when practiced at levels well below maximum sustainable yield, does not lead to stable fish communities. Management will be constrained more by ecological reality than by economic forces, but ultimately a managed system comprised of both indigenous and non‐indigenous fishes is a logical objective.     

智能钓鱼装置的触发弹射结构设计

为了躲避树枝或电线的障碍、提高钓鱼效率、增加钓鱼乐趣,研制了一款触发弹射智能钓鱼装置,该装置采用多级伸缩杆的方式,利用压缩弹簧触发后能量释放而自动弹射作用,实现多级伸缩杆联动快速推出。装置前端自动浮漂集成了微摄像头,旋转台转动自动采集水下捕捉状态,通过显示屏为用户提供信息,图像信息经控制器处理,控制旋转台转动、放线、收钓电机,实现智能钓鱼。文中对鱼竿伸缩机构进行了理论计算和实验论证,通过对伸缩鱼竿的速度仿真,达到了鱼竿在1780毫米范围内钓鱼装置的效果。