Diagnosis of CO2 dynamics and fluxes in global coastal oceans

Global coastal oceans as a whole represent an important carbon sink but, due to high spatial–temporal variability, a mechanistic conceptualization of the coastal carbon cycle is still under development, hindering the modelling and inclusion of coastal carbon in Earth System Models. Although temperature is considered an important control of sea surface pCO₂, we show that the latitudinal distribution of global coastal surface pCO₂ does not match that of temperature, and its inter-seasonal changes are substantially regulated by non-thermal factors such as water mass mixing and net primary production. These processes operate in both ocean-dominated and river-dominated margins, with carbon and nutrients sourced from the open ocean and land, respectively. These can be conceptualized by a semi-analytical framework that assesses the consumption of dissolved inorganic carbon relative to nutrients, to determine how a coastal system is a CO₂ source or sink. The framework also finds utility in accounting for additional nutrients in organic forms and testing hypotheses such as using Redfield stoichiometry, and is therefore an essential step toward comprehensively understanding and modelling the role of the coastal ocean in the global carbon cycle.     

Encapsulating metal organic framework into hollow mesoporous carbon sphere as efficient oxygen bifunctional electrocatalyst

Applying metal organic frameworks (MOFs) in electrochemical systems is a currently emerging field owing to the rich metal nodes and highly specific surface area of MOFs. However, the problems for MOFs that need to be solved urgently are poor electrical conductivity and low ion transport. Here we present a facile in situ growth method for the rational synthesis of MOFs@hollow mesoporous carbon spheres (HMCS) yolk–shell-structured hybrid material for the first time. The size of the encapsulated Zeolitic Imidazolate Framework-67 (ZIF-67) is well controlled to 100 nm due to the spatial confinement effect of HMCS, and the electrical conductivity of ZIF-67 is also increased significantly. The ZIF@HMCS-25% hybrid material obtained exhibits a highly efficient oxygen reduction reaction activity with 0.823 V (vs. reversible hydrogen electrode) half-wave potential and an even higher kinetic current density (J_K = 13.8 mA cm⁻²) than commercial Pt/C. ZIF@HMCS-25% also displays excellent oxygen evolution reaction performance and the overpotential of ZIF@HMCS-25% at 10 mA cm⁻² is 407 mV. In addition, ZIF@HMCS-25% is further employed as an air electrode for a rechargeable Zn–air battery, exhibiting a high power density (120.2 mW cm⁻² at 171.4 mA cm⁻²) and long-term charge/discharge stability (80 h at 5 mA cm⁻²). This MOFs@HMCS yolk–shell design provides a versatile method for the application of MOFs as electrocatalysts directly.     

开封市档案登记与备案工作的实践

2003年,按照《河南省档案管理条例》和《河南省档案管理登记与档案备案办法》的规定,我市开展了档案管理登记与备案工作。通过三年的工作实践,我们对档案登记与备案工作,有了更进一步的认识,更加坚定了做好这项工作的信念,明确了下一步努力的方向。     

胎儿成熟、分娩与婴幼儿心理形成浅论

胎儿的发育成熟,既是生理意义上的,也是心理的物质基础意义上的,是由胎儿自己来判定的;人的一生发展”程序“都是在胎儿阶段设定完成的;分娩与护理将影响新生命的一生。     

制约婴幼儿心理形成的先天要素分析

本文通过对新生命创造前父母的无形积累和新生命创造中与创造后的父母内外环境对新生命形成的影响分析,说明婴幼儿心理形成的先天因素。     

美国"清洁空气的挑战"培训案例介绍

简单介绍了美国“清洁空气的挑战”培训项目,并简要阐述了其对中国探究性学习的启发。     

对外宣传基层路线的经验、理论与策略研究

在"一带一路"和"中非合作"的背景下,"第四世界"是我国当前对外传播工作的重要对象."第四世界"本身落后贫乏的媒介生态,要求我们在对其进行外宣活动时,应当探索出不同于驻外媒体、孔子学院等正式平台的其他机制.本文根据马拉维录像厅和新中国初期读报组这两种基层媒介实践,提出我们在对"第四世界"进行国家形象传播时,可以将"群众...     

基于SMALL理念的初中化学校本课程建设 ——以《初中化学进阶》课程为例

对于当代学生而言,在化学学习上需要更多体验、尝试和探究创新的机会,但是相较于进一步提升化学学科学习能力而言,更应当注重学生科学态度、社会责任和问题解决等方面能力的发展,因此需要对初中化学校本课程的实施方式重新进行整体性设计,包括组织结构、课程内容、教学方法和评价方式等方面.初中化学校本课程应当注重化学启蒙教育,建立化学...     

基于表示学习的双层知识网络链路预测

当前,针对知识网络的链路预测主要是基于网络拓扑结构的相似性,很少考虑作者的研究领域,导致信息利用不充分等问题,因此本文提出了双层知识网络的链路预测框架hypernet2vec。双层知识网络,即作者合著关系网络和学术领域关系网络,利用网络表示学习,分别将两层网络中的节点映射到低维的向量空间,再输入到专门设计的卷积神经网络中计算并进行链路预测。与经典的链路预测指标如RA指标、LP指标和LRW指标等相比,hypernet2vec模型预测的AUC(area under curve)值取得了显著的提升,平均提升幅度达11.17%。文章还从情报产生层面和复杂系统层面,对模型发生作用的深层机理进行了探讨。     

网络嵌入、知识惯性与双元创新能力 ——基于动态视角的评述

[目的/意义]网络嵌入和知识惯性对提升企业创新能力具有重要影响。[方法/过程]通过文献分析,针对网络嵌入及其演化特征对知识惯性的影响、知识惯性对双元创新能力的影响以及网络嵌入对双元创新能力的影响进行了系统梳理和评述。[结果/结论]总结提炼了3点结论,并在此基础上就如何充分利用网络嵌入的演化特征来调节知识惯性与双元创新能力间的关系,从动态视角提出了整合性理论框架以及进一步的研究思路与展望,不仅对深化该领域的研究具有理论与方法启示,同时对我国企业在动态网络下有效整合网络嵌入和知识惯性、提升双元创新能力具有重要现实指导意义。