摘要：Anchoring molecular cocatalysts on semiconductors has been recognized as a general strategy to boost the charge separation efficiency required for efficient ***,the effect of molecular cocatalysts on energy funneling(i.e.,directional energy transfer)inside semiconductor photocatalysts has not been demonstrated *** we prepared CdS nanorods with both thin and thick rods and anchored the conjugated molecules 2‐mercaptobenzimidazole(MBI)and cobalt molecular catalysts(MCoA)sequentially onto the surface of *** absorption measurements revealed that MBI molecules facilitated energy funneling from thin to thick rods by the electronic coupling between thin and thick nanorods,which is essentially a light‐harvesting antenna approach to enhance the charge generation efficiency in the reaction center(here the thick rods).Moreover,MBI and MCoA molecules selectively extracted photogenerated holes and electrons of CdS nanorods rapidly,leading to efficient charge ***,CdS/MBI/MCoA displayed 15 times enhanced photocatalytic H_(2) evolution(1.65 mL)than pure CdS(0.11 mL)over 3 h of *** amount of H_(2) evolution reached 60 mL over 48 h of illumination with a high turnover number of 26294 and an apparent quantum efficiency of 71%at 420 *** study demonstrates a novel design principle for next‐generation photocatalysts.

摘要：The active sites of monodisperse transition metal Ni-clusters were anchored on carbon nitride(CN)by an in situ photoreduction deposition method to promote the efficient separation of photogenerated charges and achieve high-efficiency photocatalytic activity for hydrogen *** Ni-cluster/CN exhibited a photocatalytic hydrogen production rate of 16.5 mmol·h^(-1)·g^(-1) and a total turnover frequency(TOF(H_(2)))value of 461.14 h^(-1).X-ray absorption spectroscopy based on synchrotron radiation indicated that CN had two reaction centers to form stable interface interactions with monodispersed Ni-clusters,in which carbon can act as an electron acceptor,while nitrogen can act as an electron ***,the hybrid electronic structure of the Ni-cluster/CN system was constructed,which was favorable for photocatalytic activity for hydrogen *** in-depth understanding of the interfacial interaction between CN and Ni-clusters will have important reference significance on the mechanistic study of development based on the cocatalyst.

摘要：随着NEG并网功率不断增大和负荷日益多元化,如何快速协调配网系统源荷功率平衡,实现新能源最大化消纳,已成为亟需解决的问题。为此,首先分析了配网网格特点;其次设计了一种基于配网网格NEG与LF信息的智能终端,给出了其功能、整体构成、供电电源、信息采集与传输方案以及源荷协调策略,以协调网格内源荷功率平衡;最后研制了相关产品,重点做了网格内源荷功率协调测试,并与目前方案进行了对比。结果表明,文中所设计智能终端能够对网格内源荷功率进行可靠协调,实现NEG最大化利用和多方信息共享,推广应用价值高。

摘要：将具有高催化活性的材料与等离激元金属纳米材料复合是制备局域表面等离激元共振增强电催化剂的常用策略.然而,这种复合方式不仅会降低等离激元材料的局域表面等离激元共振强度,同时会改变等离激元电磁场的逸散方式以及热电子在复合结构内部的传输途径,无法实现最佳的等离激元增强效果.在此,我们选择了简单的Ag@Pt双金属纳米立方体作为研究对象,深入探究了热电子在金属异质结构内部的激发和传输机制以及其在电化学析氢反应中的贡献.相应的实验和理论结果证实,Pt在Ag表面的复合会改变等离激元电磁场的逸散方式,促进激发产生更多热电子,同时热电子可以通过级联传输方式转移至复合结构表面,显著增强电催化反应.这项工作为等离激元金属异质结构催化剂的设计和应用提供了重要参考.

摘要：表面污染仪广泛用于环境、核医学、商检、卫生、核电、农业等领域的表面污染测量与监测,其准确测量对于工作环境以及工作人员的安全有非常重要的意义。本文采用FJ-2207型α、β表面污染仪,对测量距离、材料吸收、探测器各部位灵敏度的不一致性、不同射线干扰、能量响应等影响表面污染仪测量结果准确度的几个因素进行了系统研究,确定了相关影响量,对正确使用各种表面污染仪,保证测量结果的准确可靠提供了指导。

摘要：The bias drift of a micro-electro-mechanical systems （MEMS） accelerometer suffers from the l/f noise and the tem- perature effect. For massive applications, the bias drift urgently needs to be improved. Conventional methods often cannot ad- dress the l/f noise and temperature effect in one architecture. In this paper, a combined approach on closed-loop architecture modification is proposed to minimize the bias drift. The modulated feedback approach is used to isolate the l/f noise that exists in the conventional direct feedback approach. Then a common mode signal is created and added into the closed loop on the basis of modulated feedback architecture, to compensate for the temperature drift. With the combined approach, the bias instability is improved to less than 13 μg, and the drift of the Allan variance result is reduced to 17 μg at 100 s of the integration time. The temperature coefficient is reduced from 4.68 to 0.1 mg/℃. The combined approach could be useful for many other closed-loop accelerometers.

摘要：成型绝缘件在变压器绝缘中的采用为减小尺寸、降低损耗以及提高绝缘可靠性提供了重要手段。设计、制造最终使用好成型绝缘件的前提是准确地分析、计算其使用工况下能受到的各种应力及其分布。为此,详细介绍了变压器绝缘系统电场分布的分析与计算,并对国内绝缘件的发展与应用进行了探讨。目前,国内以承担特高压交直流输变电设备制造的几家变压器厂为代表的主要企业已掌握了高水平的分析、计算软件,能够满足成型件使用的分析计算。而几个主要成型件生产企业,也在原材料选择、质量控制等各方面有了很大提高。通过双方共同合作,在设计、制造、使用方面加大科研投入,其成果和产品基本满足了高压交直流变压器绝缘的要求。近几年在交直流特高压设备上也有不同程度的采用,其试验结果和设备运行状态均良好,为我国变压器行业的自主化程度提高起到了一定的促进作用。

摘要：为实现经编双贾卡提花鞋面织物的高效设计,在探讨双贾卡提花鞋面织物结构特征的基础上,深入分析了双贾卡提花鞋面织物的成形原理及贾卡提花原理,研究这类织物的计算机辅助设计模型,从理论上建立经编双贾卡提花鞋面织物的垫纱运动设计、贾卡意匠设计、贾卡梳垫纱效应设计以及穿经设计数学模型,用于指导计算机软件实现该类织物的工艺设计和产品开发。结合人体足部运动需求及生产实践,介绍了鞋面功能分区设计、贾卡意匠图设计及上机工艺设计方法,总结出该类织物的设计过程与生产方式,实现了经编双贾卡双色鞋面织物的快速、准确设计。

摘要：可重构片上系统是一种兼具功能灵活性与高运算速度的新型计算平台,是面向未来嵌入式应用市场复杂需求的技术解决方案,但复杂、困难的设计过程必将阻碍它的广泛应用与进一步发展.针对当前可重构片上系统设计过程中编程不透明、可重构资源难以有效利用等问题,结合可编程器件能够根据应用特性动态配置芯片体系结构的特点,提出并实现了一套基于过程级透明编程模型的软硬件协同设计方法.在编程模型框架内,系统设计人员通过调用已根据应用特性进行优化的软硬件协同函数库,即可利用高级语言完成系统功能描述;动态软硬件划分算法在程序运行时对其进行划分,选择、调度需要转换到软件或硬件实现的库函数,并通过动态链接器实时切换函数的运行方式,从而形成一个由功能描述到系统实现的自动化流程.实验及测试结果验证了该方法的可行性和高效性.

摘要：带限函数在某区间内的振荡速度超过其最高傅里叶分量的特殊性质被称为超振荡.基于超振荡原理的微纳光子学器件可在不依赖倏逝波条件下于远场处突破衍射极限,因此在超分辨成像、纳米光刻及高密度光存储等领域具有重要应用.简要介绍了超振荡原理,重点归纳了几种超振荡微结构器件的设计及其聚焦成像性能,并指出了这些器件的不足及未来的研究重点.