LiF晶体中F+,/sup>2色心在室温下的激光运转及可调谐输出

本文把纯LiF晶体中色心激光宽带输出的转换效率提高到11%，得到了心激光的宽带输出与温度的变化曲线。实现了色心激光的波长从0.86～1.02 μm的可调谐输出，并对泵浦光作用下LiF晶体中的各种色心动力学机制进行了分析。     

数字视频混合系统的设计

介绍了利用Philips的一款视频芯片SAA71 99B实现的数字视频混合系统.该系统可以将一路PAL制彩色复合视频信号编码进入另一路PAL制彩色复合视频信号中,以取代第二路视频中用户指定的颜色,从而实现了两路视频的混合.另外还介绍了如何利用单片机的I/O口模拟I 2C总线以及如何利用单片机进行彩色空间变换的算法.     

转换波延迟时静校正

为了克服传统转换波静校正方法应用效果不佳的缺点,本文介绍一种转换波延迟时静校正方法,此法根据转换波勘探时垂直分量记录的纵波近地表模型及水平分量记录的初至时与纵波分量的初至时之差,求取转换波延迟时,并根据转换波延迟时建立横波的近地表模型,从而求取接收点的横波静校正量。文中给出了转换波延迟时静校正量的计算公式,并用实际地震数据进行了检验。结果表明此法应用效果较好,可以推广应用。目前该静校正方法已经集成到KLSeis采集软件中。     

电源设备的功率因数校正技术

功率因数校正(PFC)技术能提高电源设备的电源利用率，减少谐波。文中介绍了功率因数的定义，功率因数校正技术及其应用实例。     

The Perception of a Colored Translucent Sheet on a Background

Metelli's theory of the perception of translucency models the effective reflectance of a translucent sheet on a background as a partitive mixture of the color of the sheet and the color of the background. In the achromatic case, the usable (that is, scale-invariant) rules governing the apparent reflectances are the same as those that would emerge from the Kubelka-Munk theory. For chromatic translucency, the relationships are more complex, but a set of rules still emerge from the partitive-mixture theory that are invariant to tradeoffs between illuminant and reflectances. This column sets forth the rules in the hopes that they will have graphical applications, both on computer VDUs and in hardcopy.     

An algebraic method for processing colored images

An 8-valued commutative ring is developed to process colored images. Algebraic operators are defined to perform a number of operations such as the extraction of the primary colors and contours of different colors.     

Color characteristics of Cu-Zn-Al alloys

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一种弹载条带式SAR成像方法

弹载条带式SAR信号特点表现为小的距离弯曲量,当分辨率要求不是特别高时,若最大距离弯曲量小于一个距离分辨单元时可忽略不计,而只考虑距离走动量的校正。针对这一特点提出了一种在频域对距离迁移的线性项即距离走动校正的成像方法,并提出了距离误差校正和图像几何校正相结合的方法,使得成像效率更高。仿真成像结果验证了该方法的可行性。     

新型彩电面面观

新型彩电最能集中反映显示技术的突破性进展。本文介绍全球彩电市场概况、交互式彩电、数字式彩电、数字式有线彩电及近年来不断涌现的彩电新品，如眼控式彩电、声控式彩电、声控式彩电、多媒体彩电、三维立体彩电及无荧屏彩电等。     

Bandwidth correction for LED chromaticity

The spectral bandwidth formulae of Stearns and Stearns   are generalized for an arbitrary slit function. Correction coefficients are derived in terms of moments of the slit function. Application to model LED spectra measured with a compact, fiber‐coupled spectrometer having bandwidth of order 12 nm, and a nonlinear wavelength scale shows that accurate LED color measurements may be obtained with such an instrument. Fitting of the relatively broad slit function to line spectra for accurate wavelength calibration is also described. Such fitting, coupled consistently with the bandpass correction, improves the accuracy color measurements with a broad‐response spectrometer. © 2006 Wiley Periodicals, Inc. Col Res Appl, 31, 374–380, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.20242