摘要：Although many catalysts have been reported for the CO_(2)electroreduction to C_(1)or C_(2)chemicals,the insufficient understanding of fundamental correlations among different products still hinders the development of universal catalyst design ***,we first discover that the surface*CO coverage is stable over a wide potential range and reveal a linear correlation between the partial current densities of CH_(4)and C_(2)products in this potential range,also supported by the theoretical kinetic *** on the mechanism that*CHO is the common intermediate in the formation of both CH_(4)(*CHO→CH4)and C_(1)(*CHO+*CO→C_(2)),we then unravel that this linear correlation is universal and the slope can be varied by tuning the surface*H or*CO coverage to promote the selectivity of CH_(4)or C_(2)products,*** proofs-of-concept,using carbon-coated Cu particles,the surface*H coverage can be increased to enhance CH_(4)production,presenting a high CO_(2)-to-CH_(4)Faradaic efficiency(FE_(CH_(4))~52%)and an outstanding CH_(4)partial current density of-337 m A cm;.On the other hand,using an Agdoped Cu catalyst,the CO_(2)RR selectivity is switched to the C_(2)pathway,with a substantially promoted FE;of 79%and a high partial current density of-421 m A cm;.Our discovery of tuning intermediate coverages suggests a powerful catalyst design strategy for different CO_(2)electroreduction pathways.

摘要：The electrochemical conversion of carbon dioxide(CO_(2))has been attracting increasingly research interest in the past decade,with the ultimate goal of utilizing electricity from renewable energy to realize carbon neutrality,as well as economic and energy ***,the capture and concentrating of CO_(2) cost a substantial portion of energy,while almost all the reported researches showed CO_(2) electroreduction under high concentrations of(typically pure)CO_(2) reactants,and only very few recent studies have investigated the capability of applying low CO_(2) concentrations(such as~10%in flue gases).In this work,we first demonstrated the electroreduction of 0.03%CO_(2)(in helium)in a homemade gas‐phase electrochemical electrolyzer,using a low‐cost copper(Cu)or nanoscale copper(nano‐Cu)*** with steam,the gas‐phase CO_(2) was directly delivered onto the gas‐solid interface with the Cu catalyst and reduced to CO,without the need/constraint of being adsorbed by aqueous solution or alkaline *** tuning the catalyst and experi‐mental parameters,the conversion efficiency of CO_(2) reached as high as~95%.Furthermore,we demonstrated the direct electroreduction of 0.04%CO_(2) from real air sample with an optimized conversion efficiency of~79%,suggesting a promising perspective of the electroreduction ap‐proach toward direct CO_(2) conversion.

摘要：采用高通量测序技术获得了麦冬转录组53466条Unigenes,并通过序列分析识别出35832个SSR位点,分布于24539条Unigenes上,SSR出现频率高达67.02%,平均分布距离为4.88 kb。对包含SSR位点的24539条Unigenes进行GO和KEGG注释,结果显示主要集中于生物学过程、植物-病原体互作等基因功能和代谢通路。从SSR重复基元类型来看,单核苷酸重复数目最多,占比57.06%,其中A/T为绝对优势类型,有20193个;五核苷酸重复平均分布距离最高,为4069.34 kb。从重复次数来看,基元重复10次以上的类型数目最多,有20849个,占比61.69%。随机挑选30个不同类型的SSR基元位点并设计引物,对川麦冬、浙麦冬基因组DNA进行PCR扩增,结果显示28对引物可以在两个栽培种中扩增出条带,其中16对引物可扩增出目的条带。

摘要：本文为满足不同用户对于地震灾害风险评估功能的需求,在对地震灾害风险评估成果进行分析整理的基础上,研究设计、开发并实现了由一系列通用功能模块组成的模块化地震灾害风险评估系统。在设计阶段确定了各模块的功能、所需数据及其相互关系,分割出一系列高内聚低耦合的功能模块;在此基础上确定系统使用MEF插件式开发框架,以功能模块为单位进行软件开发,形成多个具有特定功能、互相独立的工具包;使用WPF技术对该系统平台进行开发,通过整合各功能模块,最终形成多模块灵活组合调用、满足不同用户需求的城镇地震灾害风险动态评估系统。

摘要：色彩作为物质世界中第一视感的艺术表达元素,它既能表现风格,又能渲染氛围。在新时代的影视创作中如何运用色彩的功能和意蕴,达成形神兼备的美学风格值得探讨。本文通过多模态隐喻的研究方法分析张艺谋新作《满江红》,剖析色彩对影视创作中的视效技法的结合、角色形象的塑造、叙事时空的构造、美学价值的创新、民族感情的抒发、作者的思想表达,分析色彩在影视的深层意蕴。

摘要：为满足远程防空导弹对电缆罩热防护系统的苛刻要求,通过试片级的热力联合试验,研究了2.5D石英纤维织物/硼酚醛树脂复合材料力学性能。基于有限元仿真技术,完成了复合材料电缆罩防热与承载一体化的结构设计。地面试验结果表明,一体化电缆罩能够满足导弹高速、长航时飞行中防热与承载的要求。

摘要：快速、准确、全面地收集并分析灾情信息是抗震救援工作的重中之重。在破坏性地震发生以后,房屋建筑物,道路,桥梁和通信基站都会受到不同程度的毁坏,特别是偏远村镇,基建损毁将造成灾区通信受阻,形成孤岛,严重影响救援工作的开展。针对这一问题,提出了一种基于短距离应急通信技术的地震灾情采集方法,设计出一套适用于市县局部区域范围的短距离多模式地震应急通信模块以及配套的灾情采集软件系统,实现县域内城镇灾情数据快速采集和传输。短距离多模式地震应急通信模块集成了Wi-Fi、 ZigBee、 BT(Blue Tooth,蓝牙)和2G/3G/4G等多种通信模式,自主选择最优通信模式,最大化单个模块的覆盖范围。地震发生后,即使不依赖公共通信网络,通信模块也能快速组建有效的应急通信网络,保障地震灾情数据的及时传输。经过示范区实地测试,系统运作效果良好,能满足地震现场工作人员的工作需要。