The use of antifouling agents is suggested to be a promising method for protecting oceanic instruments from biological contamination.We developed a novel antifouling material doped with capsaicin(CAP)as a filler and m...The use of antifouling agents is suggested to be a promising method for protecting oceanic instruments from biological contamination.We developed a novel antifouling material doped with capsaicin(CAP)as a filler and montmorillonite(MMT)as a carrier for the practical application of CTD(conductivity,temperature,depth)protection.The optimal parameters for preparing the material were established,and the obtained material achieved the maximum CAP loading capacity of 32.74%.The proposed material exhibited great release properties in acidic environments,which is beneficial for reducing bacterial attachment.Furthermore,the optimal conditions(temperature,flow rate,and pressure in the aquatic environment)for a better release rate of the material were determined through a series of simulation tests in lab.It provided good guidance and basis for practical application of the material.The CAP@MMT composite showed excellent efficiency and effectiveness in preventing the attachment of microorganisms during the four-month marine field tests.In the subsequent experiments,the great properties of the antifouling material were further confirmed by retesting the conductivity of four instruments participating in marine field tests.The measuring errors of CTD protected by the antifouling material are both within 0.01 mS/cm,which is far lower than that of the other two instruments.展开更多
海流的观测与计算已成为海洋工程建设中不可缺少的工作之一,但港口、码头等地方水浅急流给观测方式带来严峻挑战。本文提出了基于不同海底地形的海流观测仪姿态自动补偿技术,设计了海流观测仪自动补偿装置,有效解决了受海床坡度影响而...海流的观测与计算已成为海洋工程建设中不可缺少的工作之一,但港口、码头等地方水浅急流给观测方式带来严峻挑战。本文提出了基于不同海底地形的海流观测仪姿态自动补偿技术,设计了海流观测仪自动补偿装置,有效解决了受海床坡度影响而导致观测失效的问题;介绍了海流观测仪自动补偿装置的基本原理、主要结构、构件设计、安装方法等。该装置能搭载多种规格声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP),长期、稳定地布置于海底,进行原位观测,是浪流观测的平台之一。它由倾角自动补偿系统、防拖网构件及支架等组成。研究表明:该装置具有倾角自动补偿功能,使ADCP等观测处于垂直状态,保证观测数据的有效性;通用性好,兼容多种不同规格型号的ADCP;抗拖网性强,能有效防止各类渔船进行拖网或流网捕捞作业时对该装置及安装的仪器设备的破坏。该装置适用于不平坦海底海流观测,尤其是在水浅流急、沙波移动频繁环境,已成功地应用于十几个港口、码头、风电场、生态修复等项目的近岸海流观测。展开更多
基金supported by the directional Foundation of the Key Laboratory of Ocean Observation Technology,MNR(No.2021KlootB06)the National Natural Science Foundation of China(No.52271341)。
文摘The use of antifouling agents is suggested to be a promising method for protecting oceanic instruments from biological contamination.We developed a novel antifouling material doped with capsaicin(CAP)as a filler and montmorillonite(MMT)as a carrier for the practical application of CTD(conductivity,temperature,depth)protection.The optimal parameters for preparing the material were established,and the obtained material achieved the maximum CAP loading capacity of 32.74%.The proposed material exhibited great release properties in acidic environments,which is beneficial for reducing bacterial attachment.Furthermore,the optimal conditions(temperature,flow rate,and pressure in the aquatic environment)for a better release rate of the material were determined through a series of simulation tests in lab.It provided good guidance and basis for practical application of the material.The CAP@MMT composite showed excellent efficiency and effectiveness in preventing the attachment of microorganisms during the four-month marine field tests.In the subsequent experiments,the great properties of the antifouling material were further confirmed by retesting the conductivity of four instruments participating in marine field tests.The measuring errors of CTD protected by the antifouling material are both within 0.01 mS/cm,which is far lower than that of the other two instruments.
文摘海流的观测与计算已成为海洋工程建设中不可缺少的工作之一,但港口、码头等地方水浅急流给观测方式带来严峻挑战。本文提出了基于不同海底地形的海流观测仪姿态自动补偿技术,设计了海流观测仪自动补偿装置,有效解决了受海床坡度影响而导致观测失效的问题;介绍了海流观测仪自动补偿装置的基本原理、主要结构、构件设计、安装方法等。该装置能搭载多种规格声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP),长期、稳定地布置于海底,进行原位观测,是浪流观测的平台之一。它由倾角自动补偿系统、防拖网构件及支架等组成。研究表明:该装置具有倾角自动补偿功能,使ADCP等观测处于垂直状态,保证观测数据的有效性;通用性好,兼容多种不同规格型号的ADCP;抗拖网性强,能有效防止各类渔船进行拖网或流网捕捞作业时对该装置及安装的仪器设备的破坏。该装置适用于不平坦海底海流观测,尤其是在水浅流急、沙波移动频繁环境,已成功地应用于十几个港口、码头、风电场、生态修复等项目的近岸海流观测。
