The Role of the Choroid in Stargardt Disease

Stargardt disease is the commonest juvenile macular dystrophy. It is caused by genetic mutations in the ABCA4 gene. Diagnosis is not always straightforward, and various phenocopies exist. Late-onset disease can be misdiagnosed with age-related macular disease. A correct diagnosis is particularly critical because of emergent gene therapies. Stargardt disease is known to affect retinal pigment epithelium and photoreceptors. Many studies have also highlighted the importance of the choroid in the diagnosis, pathophysiology, and progression of the disease. The choroid is in an integral relationship with the retinal pigment epithelium and photoreceptors, and its possible involvement during the disease should be considered. The purpose of this review is to analyze the current diagnostic tools for choroidal evaluation and the extrapolation of useful data for ophthalmologists and researchers studying the disease.     

基于色素谱吸收原理的肝储备功能无创测量系统

肝病一直是我国高发疾病,肝储备功能是肝病诊治中重要的生理参数,医院传统方法采用采血比色法进行肝储备功能测量.利用吲哚氰绿ICG色素指示剂对805 nm波长光的吸光效应,患者注射ICG色素,分别采集0 min、5 min、10 min、15 min的血液样本,通过比色测量,绘制ICG浓度代谢曲线,测量肝储备功能.为了避免采血法对测量结果和病人的不良影响,提出基于色素谱吸收原理的无创肝储备功能测量系统的设计方案.实验证明,利用805 nm和940 nm敏感波长以及吲哚氰绿ICG色素吸光特性,能较好地实现无创肝储备功能测量.     

认知理论基础上的绿色包装设计

本文基于认知心理学的基本原理,对现代绿色包装设计进行详实解析,分析现状和包装存在的问题,提出为了促进绿色包装设计的发展应该采取的两方面的措施。对消费者来说,优化绿色消费意识;提高绿色消费理念,可以在广告和包装设计中有所体现。对设计者来讲,根据消费者认知规律;把绿色包装设计作为设计指导。     

汽车逆向物流系统绿色度评价研究

面对日益短缺的自然资源和严重破坏的生态环境,为促进报废汽车得到有效回收与利用,以循环经济的“3R”原则为基础,构建了汽车逆向物流系统结构模型;基于绿色度评价准则,构建了汽车逆向物流系统的评价指标体系;并提出了模糊综合评判法、数据包络分析、层次分析法相结合的综合评价方法;最后以一个案例对提出的理论与方法进行了说明与验证,为汽车逆向物流的有效运作提供参考。     

Recyclable,Flexible, Low‐Power Oxide Electronics

The ability to process and dimensionally scale field‐effect transistors with and on paper and to integrate them as a core component for low‐power‐consumption analog and digital circuits is demonstrated. Low‐temperature‐processed p‐ and n‐channel integrated oxide thin‐film transistors in the complementary metal oxide semiconductor (CMOS) inverter architecture are seamlessly layered on mechanically flexible, low‐cost, recyclable paper substrates. The possibility of building these circuits using low‐temperature processes opens the door to new applications ranging from smart labels and sensors on clothing and packaging to electronic displays printed on paper pages for use in newspapers, magazines, books, signs, and advertising billboards. Because the CMOS circuits reported constitute fundamental building blocks for analog and digital electronics, this development creates the potential to have flexible form factor computers seamlessly layered onto paper. The holistic approach of merging low‐power circuitry with a recyclable substrate is an important step towards greener electronics.     

一种径向基神经网络模型在图书馆能耗监测上的应用

由于大多数建筑没有安装能耗监测设备,如何合理、准确地制定节能措施以及实现科学化管理是一个比较困难的问题.针对这一问题,本文将日最高温度、工作时间、湿度、太阳辐射、人员密度作为影响图书馆能耗的主要因素,构建了基于径向基神经网络的能耗数据分析网络,并证明了径向基神经网络具有良好的拟合性能.为降低图书馆能耗的节能措施的制定和节能管理提供可靠依据.     

LD泵浦Nd:YVO_4/KTP激光器晶体长度对输出的影响

利用四能级激光系统的速率方程 ,对激光二极管 (LD)纵向泵浦Nd :YVO4 /KTP腔内倍频绿光激光器激活介质和倍频晶体的长度对输出激光功率的影响进行了理论计算 ,给出了参数优化结果 ,分析了它的工作特性 ,得到与理论计算符合较好的实验结果。     

全固体化Nd：YVO_4单频绿光激光器

采用“面对面”激光二极管泵浦Ｎｄ：ＹＶＯ４和ＫＴＰ内腔倍频，获得单横模单纵横绿光输出。阈值泵浦功率为１２ｍｗ，实测的单端绿光最大单横模输出为７．３ｍｗ，最大单纵模输出为１．５ｍｗ，光光转换效率为１．９％。全固化系统设计小型紧凑，运转可靠。     

138 W窄脉宽全固态绿光激光器

报道了绿光平均功率达138 W的声光调Q内腔倍频全固态Nd∶YAG绿光激光器。为了进一步提高绿光激光器的输出功率以及压窄脉宽,通过倍频晶体相位匹配角随温度变化的分析以及腔型的研究,设计并优化了U型谐振腔。实验中采用两个聚光腔,每个聚光腔由35个20 W的高功率激光二极管(LD)侧面抽运Nd∶YAG棒,利用Ⅱ类相位匹配KTP晶体腔内倍频,实现了高平均功率内腔倍频激光器的稳定运转。在两个聚光腔的激光二极管抽运电流分别为18.5 A,20.5 A时,获得了重复频率为10 kHz,脉冲宽度优于49 ns,输出功率为138 W的高功率、高重复频率、窄脉宽绿光(532 nm)输出,光-光转换效率为14.1%,不稳定度为±2.8%。     

High photocatalytic activity over starfish-like La-doped ZnO/SiO_2 photocatalyst for malachite green degradation under visible light

In this work,the unique starlike La-doped ZnO-SiO2 photocatalysts were constructed by an evaporation and calcination method and characterized in detail.UV-vis reflectance and DFT calculation confirm that the doping with La allows to obtain a decrease of band gap of ZnO/SiO_2,which enhances visible light absorbance and oxidizing ability.The photoluminescence intensity reduces greatly,indicating more effective separation of the photo generated carriers of La-doped ZnO-SiO2.Photocatalytic activities of Ladoped ZnO-SiO2 with different doping ratios under simulated visible light irradiation were evaluated with malachite green(MG) as a model pollutant.Under optimized conditions including solution pH of 8,15 mg/L of MG solution and 15 mg of catalyst dosage,0.2% La-ZnO-SiO2 exhibits the best catalytic activity in photodegradations of MG in water.The removal and mineralization efficiency of MG can reach 96.1%and 70.9% in 140 min,respectively.The as-prepared catalysts present superior stability and recyclability after four times reuse.Moreover,selective quenching experiments indicate that hydroxyl radical(·OH),hole(h~+) and superoxide radical(·O_2~-) are the main reactive species responsible for MG degradation.Possible mechanism for photocatalytic elimination of MG over La-doped ZnO/SiO_2 photocatalyst is finally proposed.