摘要：Although perovskite solar cells(PSCs)have achieved encouraging efficiency,the photon loss at the substrate due to light reflection has not been well *** management is promising to reduce reflection loss and realize higher power conversion efficiency(PCE)of ***,a bilayer antireflective coating(ARC)has been designed and coated onto the backside of the glass substrate of(FAPbI_(3))_(x)(MAPbBr_(3))_(1-x)PSCs to enhance photon harvesting and consequently the device *** bottom layer of the bilayer ARC is made from a silica polymer and the top layer is made from the mixture of hexamethyldisiloxane-modified mesoporous silica nanoparticles and a fluorinated silica *** adjusting the refractive index and the film thickness of each layer according to a two-layer model,enhanced glass transmittance in a broadband wavelength range can be reached,with the maximum transmittance increasing from ca.90%to over 95%.With the bilayer ARC,the maximum short-circuit current density and PCE of(FAPbI_(3))_(x)(MAPbBr_(3))_(1-x)PSCs can be increased from 25.5 m A cm^(-2)and 22.7%to 26.5 mA cm^(-2)and 23.9%with negligible changes in fill factor and opencircuit *** work presents a simple yet effective strategy to enhance the efficiency of solar cells employing bilayer antirefective coatings,which can be applied to other types of solar cells.

摘要：研究设计了一种新型的装车系统,首先分析目前几种装车系统的优缺点,并提出一种新的方案,介绍了系统的组成部分与工艺流程。对装车系统的给煤系统与装载系统这两个分系统进行了设计选型,其中包括皮带机的设计与液压系统的设计等。对系统最终的应用效果显示,对比其他装车系统,该系统显著提高了装车速度,减少了运输车辆等待时间。

摘要：本文利用ANSYS有限元计算模拟赤泥与煤矸石混合堆存体温度场分布和实验测量结果的变化趋势比较吻合,这说明可以利用ANSYS来模拟赤泥与煤矸石混合堆存体的温度场分布来替代实验过程,提高做实验的效率,同时也可以用于指导现场煤矸石山内部的温度场分布情况。

摘要：文章主要介绍了山西天地王坡煤业有限公司主斜井井筒延伸后,主井带式输送机的改造问题。现有主斜井带式输送机驱动装置安装在主井井口房内,延伸后矿方要求增加一套驱动装置,同样运输运量、运行速度条件下,从输送带张力和围包角两个方面对三滚筒驱动和双滚筒驱动加以对比分析,得出三滚筒驱动不一定比双滚筒驱动能减低胶带的带强。

摘要：通过《教你学好用活仲景方》网络课程的教学内容设计提高学生学习的积极性和主动性,只有对网络课程的界面设计进行科学探索,才能对仲景方示范性网络课程设计进行全面提高,使网络课程界面设计得到更好的应用,促进学习仲景方的积极性和主动性。仲景方示范性网络课程能最大限度地促进和提高学生网络课程学习的积极性、主动性、能动性和需求性。