纯棉稀薄垂直窗帘织物的染整加工

稀薄织物轻飘，易纬斜或拉断。针对其染整加工的特殊性，采用快速烧毛，酶处理抛光、高耐光染色，以及硬挺防水整理等工艺。文章对稀薄织物前处理、染色增白及后整理的各个工艺要点作具体介绍。     

基于数字补偿的多光源寻址并行检测电位图像传感器

本文介绍了一种能显著提高测量速度的光寻址电位传感器 (LAPS)。用多个光源同时激发LAPS,每个光源都采用不同的调制频率 ,对产生的光电流进行分析就可以得到所有激发区域的表面电位分布图。本文提出的方法得到被测气体完整的电位响应分布图象 ,其速度比现有方法有很大提高。本文证明了该方法的可行性并给出了相应的实验结果     

轻壤质潮土氮肥基追比对小麦产量与品质的影响

田间试验研究轻壤质潮土氮肥基追比对冬小麦产量和品质的影响。结果表明:供试麦田氮肥施用的基追比例以4:6为宜,追肥氮在拔节期施用,可获最高小麦子粒产量。基追比不同对小麦品质也有较大影响,在基追比5～6:5～4的范围内,籽粒蛋白质含量、产量、湿面筋、沉淀值均相对较高。生育期氮素积累量对蛋白质含量与产量有显著的影响。     

DLP投影显示系统的优势及发展前景

基于DLP技术的新投影系统已被开发出来,该系统的核心是DMD器件。采用二进制脉宽调制技术精确控制光的灰度等级,在大屏幕上可得到高亮度、高对比度、高分辨率的优质彩色投射图像。本文介绍DLP系统及DMD的基本工作原理,讨论DLP显示系统在技术上的优势,分析DLP显示的市场前景和技术发展趋势,     

太阳能LED灯具在城市照明中的应用

通过对太阳能LED灯具的市场分析及工作原理的介绍，阐述了太阳能LED灯具的应用。而且从LED发光源和控制器等方面实现了太阳能LED灯具的主要技术改进。     

Stabilized Blue Emission from Polyfluorene‐Based Light‐Emitting Diodes: Elimination of Fluorenone Defects

Polyfluorene (PF)‐based light‐emitting diodes (LEDs) typically exhibit device degradation under operation with the emergence of a strong low‐energy emission band (at ～ 2.2–2.4 eV). This longer wavelength band converts the desired blue emission to blue–green or even yellow. We have studied both the photoluminescence (PL) and electroluminescence (EL) of PFs with different molecular structures and found that the low‐energy emission band originates from fluorenone defects which are introduced by photo‐oxidization, thermal oxidation, or during device fabrication. X‐ray photo‐emission spectroscopy (XPS) results show that the oxidation of PF is strongly catalyzed by the presence of calcium. The fluorenone defects generate a stronger contribution to the EL than to the PL. By utilization of a novel electron‐transporting material as a buffer layer between the emissive PF and the Ca/Ag (Ba/Ag) cathode, the blue EL emission from the PF was stabilized.     

On the sensitivity of open-circuit voltage and fill factor on dangling bond density and Fermi level position in amorphous silicon p–i–n solar cell

A simple method for calculation of current–voltage characteristics of an amorphous silicon solar cell is described in terms of excitation current, J_G, and excitation voltage, V_G, the latter being defined in terms of separation of quasi-Fermi levels. Contrary to the usual method of calculating the short-circuit current and dark current separately and assuming a linear superposition, in the present method the calculations are done first in the open circuit where the neutrality of space charge can be assumed and then the current has been calculated in terms of a gradient in the quasi-Fermi levels. We find that depending on other parameters, the open-circuit voltage is a weak function of dangling bond density except in cases of very large degradation. The sensitivity of open-circuit voltage, V_oc, to light-induced degradation can further be reduced by moving the thermal equilibrium Fermi level above the upper dangling bond level. Fill factor deterioration is found to be mainly due to conductivity modulation and is higher for the lower values of thermal equilibrium Fermi level.     

生物芯片扫描仪控制系统总体设计

简要介绍了生物芯片扫描仪控制系统的总体设计,并对其中关键技术单元,如荧光信号的探测预处理技术、系统零位的精确定位、工件台高速扫描控制技术等进行了详细的阐述。该控制系统及其关键技术单元经应用于我所新研制的激光共聚焦生物芯片扫描仪,系统运行稳定、控制可靠,完全能满足整机系统的要求。