An operational high temperature thermal energy storage system using magnesium iron hydride

Metal hydrides have been demonstrated as energy storage materials for thermal battery applications. This is due to the high energy density associated with the reversible thermochemical reaction between metals and hydrogen. Magnesium iron hydride (Mg₂FeH₆) is one such material that has been identified as a thermal energy storage material due to its reversible hydrogenation reaction at temperatures between 400 and 600 °C. This study demonstates an automated thermal battery prototype containing 900 g of Mg₂FeH₆ as the thermal energy storage material with pressurised water acting as the heat transfer fluid to charge and discharge the battery. The operating conditions of the system were optimised by assessing the ideal operating temperature, flow rate of the heat transfer fluid, and hydrogen pressures. Overall, excellent cyclic energy storage reversibility was demonstrated between 410 and 450 °C with a maximum energy capacity of 1650 kJ which is 87% of the theoretical value (1890 kJ).     

Highly durable,Pt free and large-area Ni–B film synthesized by SILAR as a bifunctional electrode for electrochemical water splitting

A search for efficient, durable, large-area, and economic catalyst material for low-cost production of hydrogen and oxygen is currently a high priority in the field of electrocatalysis (EC). In view of this, a cost-effective, earth abundant, highly stable, Pt free, and large-area (8 cm × 8 cm) bifunctional Ni–B electrocatalyst is reported via simple and economic SILAR method. A highly porous surface of Ni–B film with high surface wettability indicated better electrochemical water-splitting properties for the films and is obtained at 100 cycles. A Low over-potential value to obtain HER (49 mV) and OER (340 mV) at 10 mA/cm² current suggested that they are comparable to the well-known Pt and RuO electrodes in alkaline medium (1M KOH), respectively. In actual water-splitting setup having Ni–B film (as cathode) and stainless steel (as anode), the hydrogen production of 612 ml/h is obtained at constant potential, which was enhanced by 18% i.e., 726 ml/h when a Ni–B film as both cathode and anode electrode was used. Both the electrodes are highly stable for over 15 days and interestingly they showed 7% increment in the EC performance.     

船屋文化：海南黎族传统民居探源

从文化心理行为模式的角度对黎族民居空间及造型形成过程进行了探讨。认为人类在塑造自己生存立足的场所时一直伴随着对意义的追求，人赋予建筑的表征意义在很大程度上决定了建筑空间及造型的可识别性特性，构成了场所感，成为特定地域、特定场所的一种文化“原型”识别性标志。     

建筑生长的意义——三峡学院图书馆新馆的创作理念

将建筑视为一个有机体,从生长的理念出发,借助实例阐述了建筑生长的涵义,探讨了建筑生长原形确定、生长的方式和过程,并将"生长"作为建筑更新设计的一种方式.     

SCARA机械手的轨迹规划及运动学分析

针对药品包装机(DPP-400铝塑平板泡罩机)上使用的SCARA机械手进行轨迹规划,使用运动学逆解求出目标点处各关节的变化量,采用五次多项式插值的关节空间规划法对机械手进行轨迹规划,并结合MATLAB软件的ROOT工具箱建立机械手的三维模型,通过仿真得到位移、速度和加速度3个光滑连续运动曲线;然后在ADAMS中建立1:1的虚拟样机简化模型,通过编写五次多项式驱动函数,仿真得到关节在X、Y、Z三个方向的光滑连续的受力曲线,最后综合分析运动曲线和受力曲线证明轨迹规划的函数满足使用要求。     

纯粹几何·古典精神——从格拉斯舒特住宅到三号住宅

对于大多数中国人来讲，奥斯瓦尔德·马蒂亚斯·翁格斯这个名字并不为人熟知，但在德国和欧洲地区，他是德国战后最重要的建筑师，也是德国新理性主义思潮的领军人物。其多产的一生为世人留下了大量伟大的建筑作品，他的创作思想深深影响了一大批欧洲建筑师。翁格斯的大多喜欢运用立方体等几何形体作为造型语汇，作品强调基于数字比例的严谨秩序，追求简化到极致的纯净形式，他的几所自宅尤其是后来的格拉斯舒特住宅和三号住宅都是他个人设计思想的最好体现。文章通过对格拉斯舒特住宅及三号住宅的对比分析，阐述了翁格斯追求纯粹几何形体的造型手法以及基于严谨数字比例的生成机制，探讨了背后蕴含的场所意义以及原型思想和古典精神。     

文胸原型结构分析

在对国内外现有文胸原型的绘制方法收集、比较的基础上,通过整理归类,将其归纳为定数法、公式与定数结合法、立体与平面结合法3种方法,并系统分析了这3种方法的特点和优劣,认为现有文胸原型存在着胸省量缺乏依据,重要部分规格未体现,胸高点位置不合理,肩带位置设计区域没有涉及,罩杯的容量与乳房的体积关系未涉及等问题;并提出了文胸原型结构设计需要避免上述这5类缺点,确保对人群的适用性,便于测量、绘制和使用,并能根据人体美和功能的要求进行理想化的绘制。     

一种新柱式

文章介绍了在计算机的帮助下产生的一种全新的柱式。它基于一种基本的折叠手法,其结果所呈现的极其丰富的细节超越了传统cAD工具能够绘制的极限,也超越了肉眼所能观察的极限。这些出乎意料的形式与极其微小的细节来自计算机程序的反复迭代,它们超出了建筑师的经验、教育和历史认知,无论从手法还是结果来看,都是一种彻底的创新。文章还指出,建造如此复杂的细节需要现代化的数字加工技术与独特的加工技巧。