“魅力网”概念下的城市设计方法 探讨

本文首先对\"魅力网\"进行了阐述,接着研究了\"魅力网\"的空间原型支撑体系,然后提出了一种以\"构形——属性\"空间原型互动的\"魅力耦合法\"来建构城市\"魅力网\",最后以贵州省习水县城市空间布局专项规划为实践案例解析了\"魅力耦合法\"建构\"魅力网\"的组织逻辑。     

Moisture-preventing MAPbI3 solar cells with high photovoltaic performance via multiple ligand engineering

Perovskite solar cells present one of the most prominent photovoltaic technologies,yet their stability,and engineering at the molecular level remain challenging.We have demonstrated multifunctional molecules to improve the operating stability of perovskite solar cells while depicting a high-power conversion efficiency.The multifunctional molecule 4-[(trifluoromethyl)sulphanyl]-aniline(4TA)with trifluoromethyl(-CF₃)and aniline(-NH₂)moieties is meticulously designed to modulate the perovskite.The-CF₃ and-NH₂ functional groups have strong interaction with perovskite to suppress surface defects to improve device stability,as well as obtain large crystal grains through delaying crystallization.Moreover,this-CF₃ forms a hydrophobic barrier on the surface of the perovskite to prevent cell decomposition.Consequently,the performance of the perovskite solar cells is remarkably improved with the efficiency increased from 18.00% to 20.24%.The perovskite solar cells with multifunctional molecular maintaining 93% of their original efficiency for over 30 days(-55%humidity)in air without device encapsulation,exhibiting a high long-term stability.Moreover,the lead leakage issue of perovskite solar cells has also been suppressed by the built-in 4TA molecule,which is beneficial to environment-friendly application.Ultimately,we believe this multifunctional small molecule provides an available way to achieve high performance perovskite solar cells and the related design strategy is helpful to further develop more versatile materials for perovskite-based optoelectronic devices.     

Novel prototyping method for microfluidic devices based on thermoplastic polyurethane microcapillary film

Thermoplastic polyurethane microcapillary film (TPU-MCF), as a novel extruded product, inherently contains an array of circular micron-sized capillaries embedded inside the polymer matrix. With the aid of simple laser cutting and conventional sealing technologies, a rapid prototyping method for microfluidic devices is proposed based on the ready-made microstructure of MCFs. Two functionalized microfluidic devices: serpentine micromixer and multi-droplet generator, are rapidly fabricated to demonstrate the advantages and potential of employing this new method. The whole proof-of-concept fabrication process can be completed in 8–10 min in a simple way; each procedure is repeatable with stable performance control of microfluidic devices; and the material cost can be as low as $0.01 for each device. The TPU-MCF and this novel method are expected to provide a new perspective and alternative in microfluidic community with particular requirements.     

铁碳微电解/H2O2混凝法处理焦化废水的试验研究

采用一次铁碳微电解/H2O2混凝-二次铁碳微电解/H2O2混凝法处理高色度、高COD、高毒性的焦化废水.试验确定的工艺条件:(1)铁碳微电解/H2O2法去除COD的最佳条件:pH为2、H2O2投加量为4.4 mL-1、反应时间为180min,铁屑投加量为30g-L-1、m(Fe):m(C)为3:1.(2)铁碳微电解/H2O2法去除色度的最佳条件:pH为3、H202投加量为1.8mL·L-1、反应时间为120min、铁屑投加量为30g·L-1、m(Fe):m(C)为3:1.(3)混凝的最佳条件:pH为7、FeCl3的投加量为100 mg·L-1、PAM的投加量为2 mg·L-1.结果表明,在上述最佳工艺条件下对该废水进行处理,COD和色度去除率分别可达97%和99%以上,均可达到污水综合排放标准(GB 8978-1996)中的一级标准.     

小城镇风貌的营造——“空间-景观”设计融入型的小城镇规划方法探讨

在当前城镇化加速的进程中,通用的“功能地块”布局主导型规划设计方法不利于小城镇风貌的营造．本文基于对小城镇自身发展的特点和当前通用规划方法不足的考虑．探讨一种“空间-景观”设计融入型的小城镇规划设计方法．以充分发挥城市设计在小城镇风貌塑造中的作用．并结合重庆市金佛山旅游小镇-头渡镇的镇区规划实践具体阐明．     

当代重庆“一字诀”

本文以“一字诀”的组织形式例举近年来重庆的发展特征,希望能够大致勾勒出一个不只具有面孔还有性情的重庆轮廓.