The Shanghai Cooperation Organisation(SCO)is the most extensive and populous comprehensive regional cooperation organization in the world,covering about half of the world's population,with not only a huge consumer...The Shanghai Cooperation Organisation(SCO)is the most extensive and populous comprehensive regional cooperation organization in the world,covering about half of the world's population,with not only a huge consumer market,but also rich natural resources and strong productivity.As one of the important platforms for the implementation of the Green Belt and Road Initiative,it is an important opportunity for the SCO to actively participate in global governance and contribute to building a community of global life.To investigate the status of biodiversity conservation in the SCO countries,we used literature analysis approach.We surveyed the performance and international cooperation status of the SCO countries in the implementation of the Convention on Biological Diversity(CBD),listed facing problems and threats to biodiversity conservation,including not optimistic biodiversity conservation project implementation status,contradiction between ecological protection and economic development,impacts of human activities,lack of funds and talents,etc.,and analyzed the biodiversity protection needs of the SCO countries from the perspectives of project and policy implementation status and international cooperation.According to the cooperation between China and the other SCO countries on biodiversity conservation and the post-2020 global biodiversity framework goals,we gave some recommendations:(1)promoting access to genetic resources and benefit-sharing;(2)integrating multiple funds and innovating the implementation of funding mechanism;(3)developing talent training and exchange programs and deepening multilateral cooperation;(4)strengthening cross-border cooperation and improving cooperation network;and(5)establishing a coordination mechanism for biodiversity conservation within the framework of the SCO.展开更多
Lipolytic enzymes have attracted enormous attentions because of their ability in ester hydrolysis,ester synthesis,transesterification and other biochemical reactions.Bacteria are important sources of lipolytic enzymes...Lipolytic enzymes have attracted enormous attentions because of their ability in ester hydrolysis,ester synthesis,transesterification and other biochemical reactions.Bacteria are important sources of lipolytic enzymes applied in industry.Here,a novel lipolytic enzyme encoded by esterase gene est1347 was identified in Marinobacter flavimaris WLL162,and was purified and characterized.The lipolytic enzyme Est1347 consisted of 312 amino acid residues and a 21-amino-acids N-terminal signal peptide with a predicted molecular weight of 34.2 kDa.It belongs to family V of bacterial lipolytic enzymes based on the amino acid sequence homology analysis.Est1347 is a mesophilic and alkali-resistant enzyme with the highest activity at 45℃and pH 8.5;it is stable at temperatures below 50℃and pH 7.5–11.0.Est1347 showed a preference for middle-length chain substrate p-NPC10 and a wide range of other substrates.The Km,Vmax,Kcat and Kcat/Km values of Est1347 for p-NPC10 in pH 8.5 at 45℃were 0.9411 mmol L^(−1),1285μmol min^(−1)mg^(−1),698.91 s^(−1)and 743.65 s^(−1)(mmol L^(−1))^(−1),respectively.It is also tolerant to the metal ions,organic solvents and detergents.In conclusion,the esterase Est1347 laid a foundation for further study of bacterial lipolytic enzyme family V.展开更多
针对传统视觉位姿测量方法依赖场景内目标的已知结构信息或者人为标记的问题,设计了一种基于特征匹配的相对位姿测量方法和系统,在进行相对位姿测量时无需知道场景内目标的先验信息,且有较高的测量精度。首先,使用双目相机对场景内目标...针对传统视觉位姿测量方法依赖场景内目标的已知结构信息或者人为标记的问题,设计了一种基于特征匹配的相对位姿测量方法和系统,在进行相对位姿测量时无需知道场景内目标的先验信息,且有较高的测量精度。首先,使用双目相机对场景内目标进行序列图像采集,计算机采用AKAZE算法对图像进行特征提取。然后,采用改进的KNN与RANSAC算法对相邻图像进行特征匹配并剔除误匹配点,得到正确的匹配点对后,采用三角法测量和光束法平差优化获得特征点的三维坐标,利用三维坐标与二维图像特征向量建立三维特征点库。之后,位姿测量时先使用单目相机对场景目标进行图像采集,再对待测图像进行AKAZE特征提取,将得到的特征点与特征点库进行匹配,采用EP n P+Gauss-Newton方法求解出待测图像对应的相机位姿。实验中,利用高精度转台转动摄像机并拍摄多幅图像进行测量,结果表明,位姿测量系统在[-20°,20°]范围内最大测量误差不超过0.2°,可以满足应用需求。展开更多
基金the International Cooperation and Compliance Programme of the Ministry of Ecology and Environment,the People’s Republic of China(22110106029)。
文摘The Shanghai Cooperation Organisation(SCO)is the most extensive and populous comprehensive regional cooperation organization in the world,covering about half of the world's population,with not only a huge consumer market,but also rich natural resources and strong productivity.As one of the important platforms for the implementation of the Green Belt and Road Initiative,it is an important opportunity for the SCO to actively participate in global governance and contribute to building a community of global life.To investigate the status of biodiversity conservation in the SCO countries,we used literature analysis approach.We surveyed the performance and international cooperation status of the SCO countries in the implementation of the Convention on Biological Diversity(CBD),listed facing problems and threats to biodiversity conservation,including not optimistic biodiversity conservation project implementation status,contradiction between ecological protection and economic development,impacts of human activities,lack of funds and talents,etc.,and analyzed the biodiversity protection needs of the SCO countries from the perspectives of project and policy implementation status and international cooperation.According to the cooperation between China and the other SCO countries on biodiversity conservation and the post-2020 global biodiversity framework goals,we gave some recommendations:(1)promoting access to genetic resources and benefit-sharing;(2)integrating multiple funds and innovating the implementation of funding mechanism;(3)developing talent training and exchange programs and deepening multilateral cooperation;(4)strengthening cross-border cooperation and improving cooperation network;and(5)establishing a coordination mechanism for biodiversity conservation within the framework of the SCO.
基金supported by the projects from the National Natural Science Foundation of China(No.42230411)the China Ocean Mineral Resources R and D Association(COMRA)Special Foundation(No.DY135-B2-10).
文摘Lipolytic enzymes have attracted enormous attentions because of their ability in ester hydrolysis,ester synthesis,transesterification and other biochemical reactions.Bacteria are important sources of lipolytic enzymes applied in industry.Here,a novel lipolytic enzyme encoded by esterase gene est1347 was identified in Marinobacter flavimaris WLL162,and was purified and characterized.The lipolytic enzyme Est1347 consisted of 312 amino acid residues and a 21-amino-acids N-terminal signal peptide with a predicted molecular weight of 34.2 kDa.It belongs to family V of bacterial lipolytic enzymes based on the amino acid sequence homology analysis.Est1347 is a mesophilic and alkali-resistant enzyme with the highest activity at 45℃and pH 8.5;it is stable at temperatures below 50℃and pH 7.5–11.0.Est1347 showed a preference for middle-length chain substrate p-NPC10 and a wide range of other substrates.The Km,Vmax,Kcat and Kcat/Km values of Est1347 for p-NPC10 in pH 8.5 at 45℃were 0.9411 mmol L^(−1),1285μmol min^(−1)mg^(−1),698.91 s^(−1)and 743.65 s^(−1)(mmol L^(−1))^(−1),respectively.It is also tolerant to the metal ions,organic solvents and detergents.In conclusion,the esterase Est1347 laid a foundation for further study of bacterial lipolytic enzyme family V.
基金Aeronautical Science Foundation of China (No.ASFC-201951048002)。
文摘针对传统视觉位姿测量方法依赖场景内目标的已知结构信息或者人为标记的问题,设计了一种基于特征匹配的相对位姿测量方法和系统,在进行相对位姿测量时无需知道场景内目标的先验信息,且有较高的测量精度。首先,使用双目相机对场景内目标进行序列图像采集,计算机采用AKAZE算法对图像进行特征提取。然后,采用改进的KNN与RANSAC算法对相邻图像进行特征匹配并剔除误匹配点,得到正确的匹配点对后,采用三角法测量和光束法平差优化获得特征点的三维坐标,利用三维坐标与二维图像特征向量建立三维特征点库。之后,位姿测量时先使用单目相机对场景目标进行图像采集,再对待测图像进行AKAZE特征提取,将得到的特征点与特征点库进行匹配,采用EP n P+Gauss-Newton方法求解出待测图像对应的相机位姿。实验中,利用高精度转台转动摄像机并拍摄多幅图像进行测量,结果表明,位姿测量系统在[-20°,20°]范围内最大测量误差不超过0.2°,可以满足应用需求。
