摘要：Molybdenum-based catalysts have demonstrated significant potential in the electrocatalytic hydrogen evolution reaction(HER).However,the limited exposure of active sites and strong hydrogen adsorption result in suboptimal ***,a Mo_(2)N±MoSe_(2) heterojunction is prepared on carbon cloth(MNS/CC)to enhance the *** strong electronic interaction between Mo_(2)N and MoSe_(2),combined with the lower work function of Mo_(2)N,creates an intrinsic electric field at the heterojunction interface,which markedly improves charge transfer ***,the optimized electronic structure of Mo sites further enhances charge transfer and intrinsically catalytic activity in *** a result,MNS/CC requires overpotentials of mere 65 and 210 mV to achieve current densities of 20 mA cm^(−2) and 1 A cm^(−2),respectively,with a Tafel slope of only 96 mV dec−***,MNS/CC maintains stable operation at 1 A cm^(−2) for 240 h without significant *** results offer insights into the design of non-precious metal-based electrocatalysts for industrial hydrogen production.

摘要：The gating system of a cylindrical magnesium casting has been designed by using multiple objective optimiza- tion and Taguchi *** filling and solidification processes were simulated by using MAGMASOFT（？）. The simulation results indicate that the gating system design has a significant effect on the quality of magne- sium *** an effort to obtain the optimal design of gating system,the signal-to-noise （S/N） ratio was used to analyze the effect of various gating designs on cavity filling and casting quality by using a weighting method based on the design of an orthogonal *** gating system parameters,namely,ingate height, ingate width,runner height,runner width,were optimized with a consideration of multiple objective criteria including filling velocity,shrinkage porosity and product yield.

摘要：In this paper,a novel swing vane rotary compressor(SVC)was introduced,which had significant advantages-simple mechanism,reduced frictional loss,reliable operation,and a comparatively higher compression *** on the swing vane compressor geometry model,thermodynamic model and kinetic model,the mathematical model of optimum design was established,and further theoretical and experimental studies were *** length of the cylinder,radius of the rotor and cylinder were defined as design variables and the reciprocal of EER as objective *** complex optimization method was adopted to study the structure of the swing vane *** theoretical model could provide an effective method for predicting compressor performance,which would also contribute to structural optimization of the *** study shows that the friction loss of the compressor are greatly reduced by optimized design in a given initial value,and the EER increased by 8.55%.

摘要：Silicon-based material is one of the most promising substitutes of widely used graphite anodes for the next generation Li-ion batteries due to its high theoretical capacity,low working potential,environmental friendliness,and abundant natural ***,the huge volume expansion and serious interfacial side reactions during lithiation and delithiation progresses of the silicon anode are the key issues which impede their further practical *** designs of silicon nanostructures are effective ways to address these *** this progress report,we firstly highlight the fundamental scientific problems,and then focus on recent progresses in design,preparation,in-situ characterization methods and failure mechanism of nanostructured silicon anode for high capacity lithium *** also summarize the key lessons from the successes so far and offer perspectives and future challenges to promote the applications of silicon anode in practical lithium batteries.

摘要：Three types of laminates were designed by alternately stacking AZ91 extruded sheets in different states for extrusion to improve the mechanical *** tensile tests revealed that the combination of solid-solution-treated sheets with the aging-treated sheets achieved high tensile strength and ductility,i.e.,ultimate tensile strength of~386 MPa and elongation of~19.8%,*** backscatter diffraction(EBSD)and TEM results indicated that the aging-treated layers with more nano-sized precipitates and small grain size provided high strength and reasonable ductility,while the solid-solution-treated layers with low dislocation density facilitated strain ***,the strong interface bonding between the successive layers played an important role in the enhanced ductility.

摘要：为了研究纤维素热解特性,本文利用热重/差示扫描量热法-质谱连用技术(TG/DSC-MS)对纤维素进行热解实验研究,在线监测了热解过程中H_2O、CH_2O、CO_2、醋酸或羟基乙醛、糠醛(质荷比m/z=18、30、44、60、96)几种热解主要产物的演变规律。结果显示,几种物质的最大产率温度遵循H_2O<CH_2O≈CO_2<糠醛<醋酸或羟基乙醛,其中醋酸的生成明显晚于CH_2O和糠醛,表现出不同的生成路径,而CO_2的离子图则出现了明显的双峰,DSC对应的温度(350℃)也出现了吸热峰,可见其生成存在两个阶段。针对甲醛和糠醛两种物质,本文提出了可能的生成路径。此外,本文也利用傅氏转换红外线光谱分析仪(FTIR)表征了不同温度下的热解焦样,半定量分析了几种重要官能团随温度的变化规律。本文揭示了一定纤维素热解进程,为其热转换的工业应用提供了一定的理论基础。

摘要：在AUTOSAR平台的软件架构中,基础软件层包含大量接口定义完整的标准模块。开发AUTOSAR应用时需要将基础软件层模块嵌入到操作系统上下文中,由操作系统来触发模块的主处理函数,并提供必要的数据同步机制。为此,提出一种基础软件调度器模块的设计及实现方案,将上述模块嵌入到指定项目的上下文中。实现结果表明,该方案能节约操作系统资源,提高模块可靠性和稳定性。

摘要：电解液及构筑电极电解液界面对于开发和应用高比容量储能系统至关重要。具体来说,电解液的机械(抗压性、粘度)、热(热导率和热容)、化学(溶解性、活度、反应性)、输运和电化学(界面及界面层)等性质,与其所组成的储能器件的性能直接相关。目前,大量的实验研究通过调控电解液的物理和/或化学组成来改善电解液性能,以满足新型电极材料的工作运行。与此同时,理论模拟方法近年来得到了迅速发展,使人们可以从原子尺度来理解电解液在控制离子输运和构筑功能化界面的作用。站在理论模拟研究的前沿上,人们可以利用其所揭示的机理性认识对新型电解液开展理性设计。本文首先总结了传统电解液的组成、溶剂化结构和输运性质以及电极电解液界面层的形成机理,进一步讨论了利用新型电解液设计稳定电极电解液界面层的方法,包括使用电解液添加剂、高浓电解液和固态电解质,并着重讨论了对这些新型电解液体系进行原子尺度模拟的最新进展,为了解和认识电解液提供更为基本的理解,并为未来电解液的设计提供系统的指导。最后,作者对新型电解液的理论筛选进行了展望。

摘要：针对山区道路岩质边坡在动荷载作用下的疲劳劣化特性，开展循环荷载作用下充填结构面岩体的剪切特性研究。基于自制的岩石直剪仪以及自动化采集系统，设计并使用天然岩样进行直剪试验，分析不同起伏角和充填度下结构面岩体的应力-应变曲线发展和强度演化特性，并利用平均剪胀角来表征起伏角和充填度对充填结构面岩体剪切特性的影响。研究结果表明：小起伏角结构面岩体以无峰型应力-位移曲线为主，而大起伏角的无充填、充填结构面岩体分别以陡峰型、缓峰型曲线为主，上扬型曲线主要出现于高起伏角及高充填度的结构面；随着起伏角的增加，结构面岩体剪切强度峰值因剪断破坏加剧而逐渐增强，并呈现强剪缩、弱剪胀特点；随着充填度的增加，结构面岩体剪切强度峰值及其差值均减小，且循环剪切过程中因充填层的压密效应显著，导致其剪胀特性不明显；结构面岩体剪切应力峰值和平均剪胀角均随循环剪切次数的增加而减小，并渐趋于稳定，且结构面的磨损程度也逐渐降低；当充填度大于1时，平均剪胀角的下降主要由结构面磨损、充填物部分挤出导致；当充填度小于1时，平均剪胀角的降低由结构面剪断、滑移磨损所引起。研究成果可为循环荷载作用下的山区道路岩坡长期安全、稳定及耐久性评价提供参考。

摘要：本文搜集了34篇先行文献中关于设计价值要素并进行汇总,得出97个不同类型的设计价值要素。并利用KJ法对产品设计的构成要素进行分类,提出了5个与产品设计相关的具有代表性的设计价值要素,即:经济性价值、审美性价值、创意性价值、造型性价值、环境性价值。