摘要：Due to the unique interface and electronic structure,metal/metal oxide composite electrocatalysts have been designed and exploited for electrocatalytic oxygen evolution reaction(OER)in alkaline ***,how to fabricate metal/metal oxides with abundant interfaces and well-dispersed metal phases is a challenge,and the synergistic effect between metal and metal oxides on boosting the electrocatalytic activities is still ***,by controlling the lithium-induced conversion reaction of metal oxides,metal/metal oxide composites with plentiful interfaces and excellent electrical interconnection are fabricated,which can enhance the active sites,and accelerate the mass transfer during the electrocatalytic *** a result,the electrocatalytic oxygen evolution activities of the as-fabricated metal/metal oxide composite catalysts including NiCo/NiCo2O4,NiMn/NiMn2O4 and CoMn/CoMn2O4 are greatly *** catalytic mechanism is also explored using the in-situ X-ray and Raman spectroscopic tracking to uncover the real active centers and the synergistic effect between the metal and metal oxides during water *** functional theory plus U(DFT+U)calculation confirms the metal in the composite can optimize the catalytic reaction path and reduce the reaction barrier,thus boosting the electrocatalytic kinetics.

摘要：The efficient utilization of metallic lithium(Li)is the key to enable application of Li metal full-cell with low amount of excess Li,contributing to higher safety and energy ***,we report an extraordinary Li metal full-cell with only 20%excess Li,which demonstrated significantly improved reversibility and high Coulombic *** simulated missile guidance and confinement system(SMGCS)was designed to guide and confine Li deposition through constructing compatible silver lithiophilic sites and nitrate *** sites act as effective Li nuclei to attract Li ions and direct the initial *** generated nitrate layer affords an interfacial environment favorable for confined and uniform deep Li deposition,which is theoretically verified by molecular dynamics(MD)*** two combined merits offer a robust and dendrite-free Li deposition,enabling the application of Li metal full-cell with slight excess *** also result in an outperformed Li cycling efficiency of ca.99%for over 300 cycles along with deep cycling at a high capacity of 10 mA h cm^(-2)in carbonate *** unprecedented high degree of Li utilization opens a new avenue for the future development of highly efficient Li metal full-cells.

摘要：PCM核设计软件包由组件软件PINE、堆芯软件COCO和通量图软件MAPLE组成,目前已经在华龙一号堆芯的设计中使用。PCM软件包的验证主要分为4个部分,即电厂数据、试验数据、基准题以及同类软件对比。为更好地完成迭代验证工作,开发自动化验证平台YAM,实现PCM软件包验证过程与计算逻辑的全自动化。验证结果表明,PCM软件包的计算结果与试验数据吻合得非常好,整个软件包的不确定度满足设计要求。

摘要：基于离散节块方法(DNTM)的思想,研究了一种新的适用于二维三角形节块的离散坐标数值解法.使用坐标变换将任意三角形变换为正三角形,源项和通量的空间分布使用二次正交多项式展开,横向泄漏项的空间二次分布通过使用二元二次多项式近似正三角形节块的通量分布来获得.针对小尺寸易出现不收敛的情况,提出了一种改进的节块平衡有限差分方法.数值计算结果表明,该方法能满足非结构几何区域问题的求解需求,与细网SN方法相比,该方法在较粗的网格下具有高的精度,同时还适用于较细网格下的中子输运计算.

摘要：本文依据实际工程的背景,通过高层建筑转换梁上的两个短肢剪力墙试件的拟静力试验,研究其破坏模式,抗震性能和计算方法。在试验研究的基础上,采用非线性有限元方法进行分析计算,为解决实际的复杂体型高层建筑抗震设计提供一些建议。

摘要：利用SOPHORA系统,从理论上分析了长时间RPN11物理实验间隔的可行性。通过修改中广核自主研发的通量图处理软件MAPLE和现场物理实验处理软件HOLLY等耦合软件的理论模型及开发内嵌的单点标定方法等,可以减少循环内定期RPN12物理实验的实施频率,而不影响仪控系统相关标定系数的精度。对RPN11和RPN12物理实验测量过程的敏感性分析结果表明,延长定期RPN11实验的时间间隔和取消部分RPN12实验在原理上是可行的。

摘要：本文简要剖析当前城市住宅因装修不当造成的结构隐患及讨论住宅结构设计中可能采取的一些预防措施

摘要：不同于CPR1000等二代核反应堆堆型使用的堆底插入式移动中子探测器,华龙一号等三代核反应堆使用自给能中子探测器(SPND)作为反应堆堆芯中子测量硬件,本文详细阐述了华龙一号使用的基于SPND的高精度堆芯监测系统的设计和实现。首先,提出了一种新型SPND信号处理方法,这种方法不仅解决了传统设计软件无法进行高精度SPND电流计算的缺陷,而且还能对测量的SPND进行高精度信号处理,并基于此建立了一种高精度的堆芯三维功率重构方法。随后,描述了基于这套理论模型设计出的华龙一号堆芯在线监测系统SOPHORA,并详细说明了其不确定度分析方法。不确定度分析结果表明,该系统的各项关键参数的精度可以满足高精度堆芯监测的需要。最后,为了确认该系统的性能,对比分析了华龙一号首堆在启堆过程中的测量与理论预测SPND电流的偏差和组件功率分布的偏差。结果显示,该偏差远小于启动物理试验的规程要求。不确定度分析结果和启堆过程中组件功率偏差分析结果的双重验证表明,SOPHORA实现了高精度堆芯监测,其使用的SPND信号处理及堆芯三维功率重构方法具有显著的准确性和可靠性。

摘要：白骨壤(Avicennia marina(Forsk.)Vierh.)作为红树林的先锋植物,广泛分布于我国南海沿岸,是一种研究红树植物重金属污染物耐受性分子机制很好的材料.以抑制消减杂交获得的白骨壤重金属耐受性相关基因AmNramp3片段为基础,设计基因特异性引物,利用cDNA末端快速扩增(RACE)技术克隆了其全长,长度为1 958bp;通过实时荧光定量PCR(qRT-PCR)检测了AmNramp3在重金属镉胁迫时白骨壤叶、茎和根中的表达情况,其表达量在叶中高于根和茎中,但在茎和根中有快速的响应.利用生物信息学方法预测并分析了该基因的开放阅读框,位置位于1~1 527bp,编码508个氨基酸;进而预测并分析了AmNramp3蛋白的结构,发现其氨基酸序列中不含有信号肽,说明其不是分泌蛋白;但其具有很复杂的跨膜结构,是一种跨膜蛋白.综上,AmNramp3基因编码一种跨膜蛋白,在重金属镉胁迫下表达量快速变化,可能与镉的跨膜运输密切相关,这为后续分析该基因发挥功能的分子机制奠定了基础.

摘要：Driven by the demands of fast-developed quantum-spintronic devices and magnetic tunneling junctions,exploring excellent magnetic insulators,which can func-tion above room temperature and have high symmetry(generally speaking perovskite or perovskite-like struc-ture)to facilitate their integration potential with common single crystal oxide films or substrates as further devices,have drawn special attentions[1-4].Unfortunately.