基于城市CIS的历史街区研究初探——以汉口一元片历史街区为例

城市CIS1在当今城市文化竞争中越来越受到政府及有关机构的重视,它抽象了可被公众识别的城市概念视觉元素。历史街区是城市文脉的物质载体,以往保护和更新历史街区只注重了建筑与环境的功能性和物质性,而往往忽视了人的可识别因素,造成了城市文化环境形象混乱和缺失。本文以汉口一元片历史街区为例来分析这个方面的问题。     

基于FPGA与CIS的高速高精度图像采集系统

介绍一种基于FPGA和CIS（接触是图像传感器）全新的高速高精度图像采集系统。系统由1200dpi的CIS作为图像传感器,处理来自36个通道的模拟并行数据的12个高速AD,一片作为主处理器对图像数据做拼接和处理的FPGA芯片,和以LVDS方式将图像数据传至PC做进一步处理的Camera-link接口组成。实验结果表明采集的速度可高达12m/min,检测最小孔径为30μm,检孔误差小于0.5%。本图像采集系统已成功应用到自动光学检测设备上。     

基于VLSI设计实现的高效颜色插补算法

针对Bayer格式阵列的CMOS图像传感器(CIS)片上系统(SoC)中图像信号处理单元(ISP)的研究,提出一种适合VLSI实现的高效颜色插补算法。算法重点重建了缺失的G分量,先进行像素边缘判断,进而结合边缘方向梯度加权计算,使得G分量的重建有效避免了传统方法中易造成边缘变模糊的现象;对于B和R分量的重建,充分利用小范围内已知的像素分量值对其进行线性插补,使得插补后的值更接近真实值。通过对色彩测试标板和自然图像的模拟实验表明,该算法插补后的图像与传统算法相比更清晰、信噪比更高。算法基于VL-SI设计实现,并通过FPGA验证,结果表明,该算法易于片上实现,耗费资源892个LE,最大频率可达142MHz,完全满足实时处理需求。     

不同传感器件成像质量分析

<正>伴随计算机和信息通讯技术的发展,印刷领域广泛融入数字印刷技术,从激光照排机、桌面出版系统到计算机直接制版系统,印刷流程中传递的信息已经从模拟信息转换到数字信息。针对印刷采用的原稿类型不同,需要不断优化扫描仪和数字相机等印前设备的输入性能,提高将原稿信息转换为数字信息的能力,不丢失原稿细节信息,保证印品的复制忠于原稿。     

Evaluating the economic viability of CdTe/CIS and CIGS/CIS tandem photovoltaic modules

We analyze the potential cost competitiveness of two frameless, glass–glass thin‐film tandem photovoltaic module structures, cadmium telluride (CdTe)/CuInSe₂ (CIS) and CuIn_0.3Ga_0.7Se₂ (CIGS)/CIS, based on the demonstrated cost of manufacturing the respective component cell technologies in high volume. To consider multiple economic scenarios, we base the CdTe/CIS module efficiency on the current industrial production of CdTe modules, while for CIGS/CIS, we use an aspirational estimate for CIGS efficiency. We focus on four‐terminal mechanically stacked structures, thus avoiding the need to achieve current matching between the two cells. The top cell in such a tandem must have a transparent back contact, which has not been successfully implemented to date. However, for the purpose of understanding the economic viability of both tandems, we assume that this can be implemented at a cost similar to that of sputtered indium tin oxide. The cost of both tandem module structures was found to be nearly identical on an equal‐area basis and approximately $30/m² higher than the single‐junction alternatives. Both tandem modules are about 4% (absolute) more efficient than a module by using the top‐cell material alone. We find that these tandem modules might reduce total system cost by as much as 11% in applications having a high area‐related balance‐of‐system cost, such as area‐constrained residential systems; however, the relative advantage of tandems decreases in the cases where balance‐of‐system costs are lower, such as in commercial and utility scale systems. Copyright © 2017 John Wiley & Sons, Ltd.     

一种用于CMOS图像传感器的Column-Level模数转换器

设计了一种用于CMOS图像传感器(CIS)的column-level模数转换器(ADC)。它由一种新型斜坡发生器构成,具有分辨率可调的特点,而且以简单的结构实现了高精度和低功耗,占用较小的版图面积。基于0.35μm2P4M标准CMOS工艺,8bit ADC转换时间约50μs,最大线性误差小于±0.5LSB。在分辨率为640×480pixel的CIS中,每列共用1个比较器,提高了传感器的吞吐速率,帧频约40fps;3.3V电压下ADC总功耗不超过27mW,占用版图面积约0.5mm2。     

Single-graded CIGS with narrow bandgap for tandem solar cells

Multi-junction solar cells show the highest photovoltaic energy conversion efficiencies, but the current technologies based on wafers and epitaxial growth of multiple layers are very costly. Therefore, there is a high interest in realizing multi-junction tandem devices based on cost-effective thin film technologies. While the efficiency of such devices has been limited so far because of the rather low efficiency of semitransparent wide bandgap top cells, the recent rise of wide bandgap perovskite solar cells has inspired the development of new thin film tandem solar devices. In order to realize monolithic, and therefore current-matched thin film tandem solar cells, a bottom cell with narrow bandgap (~1 eV) and high efficiency is necessary. In this work, we present Cu(In,Ga)Se₂ with a bandgap of 1.00 eV and a maximum power conversion efficiency of 16.1%. This is achieved by implementing a gallium grading towards the back contact into a CuInSe₂ base material. We show that this modification significantly improves the open circuit voltage but does not reduce the spectral response range of these devices. Therefore, efficient cells with narrow bandgap absorbers are obtained, yielding the high current density necessary for thin film multi-junction solar cells.     

电子耳蜗体外语音处理器的设计

电子耳蜗是一种通过电刺激残存听神经使重度耳聋患者恢复部分听力的人工装置,由体外语音处理器和体内接6/刺激器组成.本文设计基于通用16位定点DSP芯片TMS320VC5502的语音处理器,系统设计包括硬件和软件部分.硬件部分由采样模块、发射模块组成,低功耗立体声模数转换芯片CS53L21用于采集语音信号,利用MLX90121通过射频发射编码的语音信息.软件部分实现4通道的CIS(Continuous Interleaved Sampling)语音处理策略,完成对采样语音信号的处理,并通过采样语音信号数据验证算法的正确性.     

基于MapXtreme的鹰眼技术

本文介绍了地理信息管理中鹰眼技术的原理,作用以及在基于MapXtreme的WebGIS信息发布平台上用ASP脚本如何具体实现鹰眼技术。     

影响当代广告创意的营销理论

CIS理论、体验营销理论和整合营销传播理论是20世纪下半叶重要的营销理论,它们深刻影响了当代广告创意,包括创意的形式要素、主题选择和思维导向等方面。文章结合理论阐述与案例分析,对这些影响进行深入探讨,力求从营销学的角度来揭示广告创意的规律。