Ultraflexible and Lightweight Bamboo‐Derived Transparent Electrodes for Perovskite Solar Cells

Wearable devices are mainly based on plastic substrates, such as polyethylene terephthalate and polyethylene naphthalate, which causes environmental pollution after use due to the long decomposition periods. This work reports on the fabrication of a biodegradable and biocompatible transparent conductive electrode derived from bamboo for flexible perovskite solar cells. The conductive bioelectrode exhibits extremely flexible and light‐weight properties. After bending 3000 times at a 4 mm curvature radius or even undergoing a crumpling test, it still shows excellent electrical performance and negligible decay. The performance of the bamboo‐based bioelectrode perovskite solar cell exhibits a record power conversion efficiency (PCE) of 11.68%, showing the highest efficiency among all reported biomass‐based perovskite solar cells. It is remarkable that this flexible device has a highly bendable mechanical stability, maintaining over 70% of its original PCE during 1000 bending cycles at a 4 mm curvature radius. This work paves the way for perovskite solar cells toward comfortable and environmentally friendly wearable devices.     

基于关口表节点数据监测的电量线损监测系统研究

为了实现不同供电区域线损量及线路故障的实时在线监测,在不同线路关口表终端安装基于无线传输的电量监测装置,通过无线传输方式对各节点关口表电量数据进行实时提取和分析,实现各节点关口表电量数据的集成存储和线损计算,确定不同供电线路的线损率以及故障特征,上位机采用组态软件构建关口表数据监测、线损分析及故障预警平台,对电量、线损数据以及故障信息进行远程实时监测,利用界面发布功能实现各项监测数据及故障信息的实时全局共享,为实现不同供电线路线损的实时监测、故障的实时预警以及快速维护提供了一种重要的技术手段。     

铜纳米流体的制备及微流动特性研究

采用混合法配制了铜纳米粒子质量分数分别为1%和2%的铜-水纳米流体,通过添加相同质量分数的十二烷基苯磺酸钠分散剂并施加超声振动,使纳米流体的粒子稳定悬浮时间达30~40h。实验研究了所配制的纳米流体在压力驱动下流经直径分别为25μm和50μm的不同长度微圆管道的流动特性,并与蒸馏水流动特性及理论估算值进行了对比,发现纳米流体流量-压力特性基本呈线性关系,与理论估算值存在一定偏差,这主要是由尺度效应等所致。     

激光烧结聚合物基纳米蒙脱土复合材料的实验研究

将纯PS粉末、PS/OMMT复合粉末和PS/EP/OMMT复合粉末进行激光烧结试验.结果表明,在相同的工艺参数条件下,两种复合粉末的烧结试样均有优于纯PS粉末的表现;而PS/EP/OMMT复合粉末的表现最佳,在拉伸强度、弯曲强度和悬臂冲击强度方面比纯PS粉末分别提高了139%、108%和179%.     

基于PLC控制的爬行式智能弧焊机器人系统的研制

为实现大型工件的自动焊接而开发了爬行式智能弧焊机器人系统 ,详细论述了该系统的组成、工作原理和特点 ,对其跟踪机构提出了一种协调控制的方案 ,并通过实验得到了爬行小车的控制规律。焊接实验表明 ,该系统具有较好的稳定性、可靠性 ,跟踪精度高 ,可达到± 0 .5 mm,焊接质量能够达到工业生产的要求 ,在大型球罐和船体的焊接中有良好的应用前景。     

电火花成形机床微细加工相关探索

首先简要介绍了电火花微细加工目前的发展状况。并概括地分析了商品电火花成形机用于微细加工所具有的一些特殊优势。最后通过微轴的加工实例来证实其进行实用微细加工的可行性。     

基于可拓学的生态园林设计方法及程序设计初探

可拓学是一种辅助策略生成的逻辑方法,正被逐渐引用到生态城市规划领域中。生态园林是基于时代背景下衍生出的能够改善社会以及自然环境的园林建设方式。目前已经有很多辅助生态园林设计的理念、方法和技术,但在系统地、联系地分析问题方面还比较欠缺。可拓学拥有突破矛盾问题、关联分析问题的特点,十分适合引用到生态园林设计中。基于生态园林设计的需要,文章初步总结出拆分与重构、共轭分析、相关网分析三种可拓生态园林设计方法,并设计了相应的程序流程,为可拓生态园林设计方法构建基本框架。     

Synergistic extraction of rare earth by mixtures of 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester and di-(2-ethylhexyl) phosphoric acid from sulfuric acid medium?

The extraction of Nd3 and Sm3 , including the extraction and stripping capability as well as the separation effect of Nd3 or Sm3 , from a sulfuric acid medium, by mixtures of di-(2-ethylhexyl) phosphoric acid (HDEHP, H2A2(0)) and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (HEH/EHP, H2L2(0)) were studied. The distribution ratios and synergistic coefficients of Nd3 and Sm3 in different acidities were also determined. A synergistic extractive effect was found when HDEHP and HEH/EHP were used as mixed extractants for Sm3 or Nd3 . The chemical compositions of the extracted complex were determined as Nd·(HA2)2·HL2 and Sm·(HA2)2·HL2. The extraction equilibrium constants, enthalpy change, and entropy change of the extraction reaction were also determined.     

Synergistic extraction of rare earth by mixtures of 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester and di-（2-ethylhexyl） phosphoric acid from sulfuric acid medium

The extraction of Nd^3＋ and Sm^3＋, including the extraction and stripping capability as well as the separation effect of Nd^3＋ or Sm^3＋, from a sulfuric acid medium, by mixtures of di-（2-ethylhexyl） phosphoric acid （HDEHP, H2A2（0）） and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester （HEH/EHP, H2L2（0）） were studied. The distribution ratios and synergistic coefficients of Nd^3＋ and Sm^3＋ in different acidities were also determined. A synergistic extractive effect was found when HDEHP and HEH/EHP were used as mixed extractants for Sm^3＋ or Nd^3＋. The chemical compositions of the extracted complex were determined as Nd.（HA2）2-HL2 and Sm.（HA2）2-HL2. The extraction equilibrium constants, enthalpy change, and entropy change of the extraction reaction were also determined.     

苯乙酮双缩二氨基硫脲合Sn(Ⅱ)、Pb(Ⅱ)配合物的直接电化学合成

合成了新的含硫希夫碱配体苯乙酮双缩硫代对称二氨基脲,在以此化合物为配体的非水溶剂中,用Ｓｎ、Ｐｂ金属做阳极,首次用电化学金属阳极氧化法合成了苯乙酮双缩硫代对称二氨基脲（ＨＬ）与Ｓｎ（Ⅱ）、Ｐｂ（Ⅱ）的金属配合物,通过元素分析、红外光谱、紫外光谱、磁化率、摩尔电导等对配体和配合物进行了表征．