太阳能海水脱盐中光热材料与蒸发装置的研究进展

用于海水脱盐的太阳能界面蒸发装置因其绿色环保、简单高效以及适用范围广等优点,受到了广泛关注。与传统的体积式蒸发装置不同,太阳能界面蒸发装置将太阳光的收集和蒸汽的产生锁定在空气-水的界面,无需从底部加热整体水来产生蒸汽,极大提高了能源利用效率。本文详细介绍了太阳能界面水蒸发装置的重要组成部分——光热材料的光热转换机理、材料种类以及材料的性能;探讨了高效海水净化太阳能蒸发装置的设计策略(增强光吸收、充足水供应、耐盐排盐等)。在此基础上,总结了基于界面蒸发中的太阳能蒸发装置的研究进展,展望了新型太阳能蒸发装置在海水净化领域的发展前景。     

电商生态系统四方演化博弈研究

受启发于近些年频繁曝出的消费者权益保护问题,为探析消费者行为对电商生态系统中其他群体策略选择的影响,本文基于演化博弈理论,考虑消费者的投诉行为,构建由政府、电商平台、商家以及消费者组成的四方演化博弈模型;讨论各方主体的策略选择,分析策略组合稳定点,并应用MATLAB工具进行仿真模拟实验。经上述研究,本文得出结论：消费者的投诉行为有利于促进政府严格监管、电商平台严格管理、商家诚信经营。由此,建议政府和电商平台充分发挥监督管理作用,以更好地保障消费者的合法权益,并遏制消费者的恶意投诉行为,从而实现电商生态系统的稳定可持续发展。     

Estimates for the Tail Probability of the Supremum of a Random Walk with Independent Increments

The authors investigate the tail probability of the supremum of a random walk with independent increments and obtain some equivalent assertions in the case that the increments are independent and identically distributed random variables with O-subexponential integrated distributions. A uniform upper bound is derived for the distribution of the supremum of a random walk with independent but non-identically distributed increments, whose tail distributions are dominated by a common tail distribution with an O-subexponential integrated distribution.     

超越整函数Fatou分支的某些性质

讨论了有限个超越整函数fi(i=1,2,…,m}迭代生成的函数g=f1 o f2 o…o fm 的Fatou分支的性质,给出了g(z)的Fatou分支有界的一个充分条件.并证明了在该条件下,对g的任意游荡域U,都有{gn}的一个子列在U上趋于∞.     

New Anthracene Derivatives as Triplet Acceptors for Efficient Green‐to‐Blue Low‐Power Upconversion

Three new anthracene derivatives [2‐chloro‐9,10‐dip‐tolylanthracene (DTACl), 9,10‐dip‐tolylanthracene‐2‐carbonitrile (DTACN), and 9,10‐di(naphthalen‐1‐yl)anthracene‐2‐carbonitrile (DNACN)] were synthesized as triplet acceptors for low‐power upconversion. Their linear absorption, single‐photon‐excited fluorescence, and upconversion fluorescence properties were studied. The acceptors exhibit high fluorescence yields in DMF. Selective excitation of the sensitizer Pd^IIoctaethylporphyrin (PdOEP) in solution containing DTACl, DTACN, or DNA‐CN at 532 nm with an ultralow excitation power density of 0.5 W cm^?2 results in anti‐Stokes blue emission. The maximum upconversion quantum yield (Φ_UC=17.4 %) was obtained for the couple PdOEP/DTACl. In addition, the efficiency of the triplet–triplet energy transfer process was quantitatively studied by quenching experiments. Experimental results revealed that a highly effective acceptor for upconversion should combine high fluorescence quantum yields with efficient quenching of the sensitizer triplet.     

双波长视网膜成像自适应光学系统的轴向色差补偿方法

双波长视网膜成像自适应光学系统非常适用于视网膜微血管的高对比度和高分辨率成像。本文重点研究了双波长自适应系统的轴向色差补偿问题。首先对轴向色差进行了测量,对实测波前进行了分析,并给出任意波前轴向色差补偿法。自适应校正实验结果显示,色差补偿后,波前均方根误差减小到0.16λ(λ=589 nm),视网膜微血管分辨率提高到6μm。这项工作可用于视网膜成像的临床应用。     

渗透物理学史的“光的色散”教学设计

以中国古人及国外科学家研究色散现象事件发展为脉络,在学生学习光的色散时渗透物理学史,让学生深入了解色散的成因,以此培养学生的能力,提升学生的物理素养.     

炔功能化的芘衍生物在有机场效应晶体管的应用

利用Sonogashira偶联反应在芘的1,3,6,8位引入炔键合成了一个X型化合物(SiPy)．它的光物理性质、热学性质、薄膜形态和有机场效应晶体管性质被研究．热重分析结果表明SiPy具有高的稳定 性．原子力显微镜图像显示SiPy的薄膜形态依赖于衬底的温度．基于SiPy的薄膜OFET器件被制作,SiPy呈现p型半导体特征．     

On the Dual Orlicz Mixed Volumes

In this paper, the authors define a harmonic Orlicz combination and a dual Orlicz mixed volume of star bodies, and then establish the dual Orlicz-Minkowski mixed-volume inequality and the dual Orlicz-Brunn-Minkowksi inequality.