Plasmonic Oxygen-Deficient TiO2-x Nanocrystals for Dual-Band Electrochromic Smart Windows with Efficient Energy Recycling

Dual-band electrochromic smart windows capable of the spectrally selective modulation of visible (VIS) light and near-infrared (NIR) can regulate solar light and solar heat transmittance to reduce the building energy consumption. The development of these windows is however limited by the number of available dual-band electrochromic materials. Here, plasmonic oxygen-deficient TiO_2-x nanocrystals (NCs) are discovered to be an effective single-component dual-band electrochromic material, and that oxygen-vacancy creation is more effective than aliovalent substitutional doping to introduce dual-band properties to TiO₂ NCs. Oxygen vacancies not only confer good near-infrared (NIR)-selective modulation, but also improve the Li⁺ diffusion in the TiO_2-x host, circumventing the disadvantage of aliovalent substitutional doping with ion diffusion. Consequently optimized TiO_2-x NC films are able to modulate the NIR and visible light transmittance independently and effectively in three distinct modes with high optical modulation (95.5% at 633 nm and 90.5% at 1200 nm), fast switching speed, high bistability, and long cycle life. An impressive dual-band electrochromic performance is also demonstrated in prototype devices. The use of TiO_2-x NCs enables the assembled windows to recycle a large fraction of energy consumed in the coloration process (“energy recycling”) to reduce the energy consumption in a round-trip electrochromic operation.     

工程桩检测技术的若干问题

桩的设计与施工技术日益成熟 ,但作为桩的测试方法尚未完善。该文对工程桩质量检测的几种方法进行分析探讨 ,重点阐述了每一种检测方法中存在的若干需要注意或有待解决的问题 ,为工程桩质量检测提供参考意见。     

某正交空腹网壳结构抗震性能分析

应用振型分解反应谱法和时程分析法对某正交空腹网壳结构进行常遇地震作用下的抗震分析。讨论在不同方向、不同维数地震波激励下正交空腹网壳结构的动内力分布特点。分析结果表明,计算结构地震响应时需按多向多维进行分析,振型分解反应谱法与时程分析法计算的轴力动内力系数基本一致,而弯矩动内力系数差别较大。     

海外项目建筑电气工程施工图深化设计及管理

随着国际先进项目施工管理模式的引入以及海外工程承包项目的开展,施工图深化设计逐渐被纳入项目管理中,成为了其不可或缺的一部分。深化设计不仅能推进项目进度的发展,还可以在一定程度上节约施工成本。     

地铁盾构区间遇到锚索障碍物的处理方法及技术控制

本文结合地铁盾构区间处理锚索障碍物的工程实例,介绍了锚索障碍物处理的方案比选,浅析全套管全回转钻机切索法破除锚索障碍物的施工工艺以及技术要点与质量控制,为今后地铁盾构施工遇到类似障碍物提供借鉴经验。     

Porous Y<Subscript>2</Subscript>O<Subscript>3</Subscript> microcubes: synthesis and characterization

In this work, a facile route using a simple solvothermal reaction and sequential heat treatment process to prepare porous Y₂O₃ microcubes is presented. The as-synthesized products were characterized by X-ray powder diffraction (XRD), scanning electronic microscope (SEM), energy dispersive spectrometer (EDS), thermogravimetric analysis (TG), and differential thermal analysis (DTA). The thermal decomposition process of the Y₂O₃ precursor was investigated. SEM results demonstrated that the as-prepared porous Y₂O₃ microcubes were with an average width of about 20 μm and thickness of about 8 μm. It was found that the morphology of the Y₂O₃ precursor could be readily tuned by varying the molar ratio of S₂O₈²⁻ to Y³⁺. Y₂O₃:Eu³⁺ (6.6%) microcubes were also prepared and their photoluminescence properties were investigated.     

PET黏合剂及其弹性体热解与推进剂热解相关性研究

采用差示扫描量热/热重(DSC/TG)和裂解气相色谱质谱联用(Py-GC/MS)分析技术研究了PET黏合剂体系、PET/TDI弹性体以及含PET黏合剂体系的简单组分推进剂的热分解特性和热裂解产物状况,探索了PET弹性体的热分解与含PET黏合剂体系的推进剂热解性能之间的相关性.研究结果表明,混合硝酸酯增塑的PET黏合剂体...     

舰机协同防空作战信息网络的复杂性分析与实证

为了提高航母编队的防空作战效能,必须对防空作战系统进行设计和优化.提出一种基于复杂网络理论的航母编队防空作战系统分析方法.该方法在分析航母编队的信息协同网络结构的基础上,对作战系统中的信息进行分类,对平台中心防空作战模式和舰机协同防空作战模式的信息协同进行比较,采用复杂网络分析编队作战系统的结构,建立航母编队防空作战系...     

施工方案对招标控制价的影响分析

根据《建设工程工程量清单计价规范》,分析招标控制价和施工方案对立统一的关系,并以工程实例分析施工方案对招标控制价的影响,重点分析不编制施工方案、施工方案选择不当、不参照招标文件编制等问题对招标控制价的影响。提出合理确定招标控制价的步骤和措施,包括组建包含工程技术人员和造价人员的招标控制价编制小组,由工程技术人员根据施工图纸编制施工方案,由造价人员编制工程量清单和招标控制价,由技术负责人复核审批招标控制价。     

基于单处理器的组合式三相逆变电源分相调制技术

本课题研究的组合式三相逆变电源是基于单相逆变电源设计,采用分相调制策略控制各相的输出电压,使三相逆变器输出电压对称。组合式逆变器的输入侧由中频发电机供电,输出侧的一端直接相连形成中性线。这种拓扑使逆变电源既能满足三相负载对称或者不对称运行,也能满足单相负载运行。本课题仅用单个DSP处理器产生12路PWM波,节省了芯片资源。实验结果表明,该方案满足逆变电源供电需求,输出三相电压对称性良好。