摘要：Biomedical metals are widely used as implant materials in the human or animal body to repair organs and restore function, such as heart valves, meninges, peritoneum and artificial *** element affects the microstructure, mechanical property, corrosion resistance and wear resistance, but also influences the antibacterial and biological ***, antibacterial metal alloys have shown great potential as a new kind of biomedical materials, in which Cu has been widely used as antibacterial agent *** addition, biodegradable metal alloys, including magnesium alloy and zinc alloy, also have attracted much attention *** was also used as alloying element to adjust the degradation ***, the role of Cu in the alloy design will be very important for the development of new *** this paper, we summarized the recent research results on the Cu-containing metal alloy for biomedical application and hoped that this review would give more suggestions for the further development of biomedical metal alloy.

摘要：Electrochemical CO2 reduction reaction(CO2RR)to formate is economically viable considering the energy input and market *** learning nature,a series of chloroplast-like porous bismuth-based core–shell(CPBC)materials have been *** these materials,the porous carbon can enrich and transfer CO2 to the core–shell Bi@Bi2O3 in CO2 reduction process,during which Bi2O3 layer can be transformed into activated metastable layer to efficiently convert CO2 into formate and Bi can provide abundant *** on this,superior performances for most of important parameters in CO2 RR can be achieved and best of them,CPBC-1 presents remarkable Faradaic efficiency(FEformate>94%)over a wide potential range(-0.65 to-1.0 V)with high catalysis durability(>72 h).Noteworthy,its maximum energy efficiency is as high as 76.7%at-0.7 V,the highest one in reported bismuth-based *** work opens novel perspectives in designing nature-inspired CO2RR electrocatalysts.

摘要：The underlying spin-related mechanism remains unclear,and the rational manipulation of spin states is challenging due to various spin configurations under different coordination ***,it is urgent to study spin-dependent oxygen evolution reaction(OER)performance through a controllable ***,we adopt a topochemical reaction method to synthesize a series of selenides with eg occupancies ranging from 1.67 to *** process begins with monoclinic-CoSeO_(3),featuring a distinct laminar structure and Co-O6 *** topochemical reaction induces significant changes in the crystal field's intensity,leading to spin state *** transitions are driven by topological changes from a Co-O-Se-O-Co to a Co-Se-Co configuration,strengthening the crystalline field and reducing eg orbital *** reconfiguration of spin states shifts the rate-determining step from desorption to adsorption for both OER and the hydrogen evolution reaction(HER),reducing the potential-determined step barrier and enhancing overall catalytic *** a result,the synthesized cobalt selenide exhibits significantly enhanced adsorption *** material demonstrates impressive overpotentials of 35 mV for HER,250 mV for OER,and 270 mV for overall water splitting,indicating superior catalytic activity and ***,a negative relation between eg filling and OER catalytic performance confirms the spin-dependent nature of *** findings provide crucial insights into the role of spin state transitions in catalytic performance.

摘要：建立了基于蒙特卡罗仿真方法的战斗部毁伤效率评估模型,提出了将蒙特卡罗仿真结果下的毁伤概率最大作为战斗部威力设计原则,通过对各种设计参数取不同值时毁伤概率大小的对比,得到了各参数的最优值或最优取值范围。针对某特定雷达目标,应用此方法对战斗部参数进行优化,成功实现杀伤爆破战斗部的威力设计。

摘要：自然光环境设计是现代建筑创作的一个有机组成部分，它既是艺术又是科学，同时也受经济和能源条件的制约。从建筑设计的角度来探讨自然光对建筑的重要作用，通过对光的反射特性、透射特性以及光与影之间的关系的研究，结合实例分析，论述光在建筑设计中的创意运用及其效果。探讨自然元素——光在建筑设计中运用的途径，以增强建筑的关感与实用性。

摘要：In modern energy-saving replication storage systems, a primary group of disks is always powered up to serve incoming requests while other disks are often spun down to save energy during slack periods. However, since new writes cannot be immediately synchronized into all disks, system reliability is degraded. In this paper, we develop a high-reliability and energy-efficient replication storage system, named RERAID, based on RAID10. RERAID employs part of the free space in the primary disk group and uses erasure coding to construct a code cache at the front end to absorb new writes. Since code cache supports failure recovery of two or more disks by using erasure coding, RERAID guarantees a reliability comparable with that of the RAID10 storage system. In addition, we develop an algorithm, called erasure coding write （ECW）, to buffer many small random writes into a few large writes, which are then written to the code cache in a parallel fashion sequentially to improve the write performance. Experimental results show that RERAID significantly improves write performance and saves more energy than existing solutions.

摘要：本文是周星教授与王黎光教授围绕中国音乐文化、中国音乐教育特别是"中国乐派"展开的对话实录。王黎光教授系统介绍了中国音乐学院发展特色及理念、创建倡导"中国乐派"的意义价值及现实路径、新文科建设与中国音乐学院的实施举措等,在对谈交流中展示了新时代中国音乐重塑自信、奋发有为的责任担当。

摘要：Carbon dioxide as a notorious greenhouse gas triggers severe global warming which is threatening the balance of ecosystem. In this respect, effectively capturing and transforming CO_(2)into value-added chemicals are essential but still challenging tasks. As a kind of emerging crystalline porous material, covalent organic frameworks(COFs) have been demonstrated to be able to adsorb gases and function as catalysts to facilitate chemical transformations. Herein, we report an imine-linked, cobalt sandwich complex-based COF(Co-BD-COF) with high crystallinity and large surface ***-BD-COF can efficiently catalyze the transformation of CO_(2)into cyclic carbonates due to abundant metal sites and high porosity. In addition, Co-BD-COF exhibits high catalytic selectivity toward small ethylene oxide derivatives in cycloaddition reaction due to the large steric hindrance around the cobalt complexes rendered by the peripheral phenyl *** new metal sandwich-type building block provides a new strategy for improving catalytic selectivity of COFs.

摘要：随着思想启蒙运动、工具理性以及机械复制时代的到来,笼罩在艺术品上的光晕已黯然消退。黑格尔从西方艺术发展史的角度分析认为,艺术最终将让位于哲学,并首次提出了艺术即将终结的预言;阿瑟.C.丹托在批驳艺术史三种叙述模式的基础上认为,现在历史与艺术正坚定地朝着不同的方向前进,艺术的存在已不再具有任何历史意义,由此他提出了艺术的二次终结论。其实,原生态不仅表现在艺术创造过程中情感与审美情趣的自然抒发,也表现在文化的生存与传承中。由于原生态是艺术产生与发展的基础,原生态诗学客观地存在于文学艺术中,它的存在为艺术的不断发展提供了源源不断的动力。因此,艺术不会终结,原生态诗学是后现代艺术走出低谷期并再创辉煌的基础与保证。

摘要：根据基于性能抗震设计的思想,提出一种摇摆式预应力混凝土桥墩基于位移的抗震设计方法。该方法根据桥梁抗震设防水准确定桥墩的损伤水平,并考虑墩底接缝区变形的影响计算桥墩的目标位移;借助非弹性位移谱计算桥墩的位移需求。摇摆式预应力混凝土桥墩在墩底接缝区设置耗能钢筋或外部耗能装置来耗能地震能量,利用无粘结后张拉钢束在接缝处产生的摩擦力提供剪切抗力,合理设计预应力钢束的初张力,使其在地震荷载作用下保持在弹性范围内,保证其良好的复位能力。通过与已有的设计方法相比,评估了所提出的设计方法的可靠性。研究结果表明:与已有的设计方法相比,用所提出的摇摆式预应力混凝土桥墩基于位移的抗震设计方法的设计结果与非线性时程分析结果的相关性更好。