全光波长转换技术

文章简要介绍了全光波长转换技术在WDM全光通信网中的作用；介绍了以半导体光放大器（SOA）为核心器件的几种全光波长的转换技术——利用SOA的交叉增益调制效应、交叉相位调制效应或SOA中的四波混频效应实现波长转换，分析了工作原理并介绍了研究进展情况。     

玫瑰线扫描特性及方位信息提取问题的探讨

本文对红外制导跟踪系统采用的玫瑰线扫描的特性进行了分析，文中简要论述了玫瑰线扫描图案的特点，并从这种扫描的时序分析中得出目标脉冲的一些重要的特性；包括非周期性，多脉冲特性和目标脉冲的可区分性等；扼要讨论了目标方位信息的提取问题，最后对这种扫描方式作了简要评述。     

Filter-based models for pattern classification

In this paper we consider a technique for pattern classification based upon the development of prototypes which capture the distinguishing features (“disjunctive prototypes”) of each pattern class and, via cross-correlation with incoming test images, enable efficient pattern classification. We evaluate such a classification procedure with prototypes based on the images per se (direct code), Gabor scheme (multiple fixed filter representation) and an edge (scale space-based) coding scheme. Our analyses, and comparisons with human pattern classification performance, indicate that the edge-only disjunctive prototypes provide the most discriminating classification performance and are the more representative of human behaviour.     

气体传感器阵列

从气体传感器选择性和多功能化两个重要指标出发，指出气体传感器阵列与微处理机相结合，并通过模式识别技术，不仅能够解决交叉敏问题，提高器件的选择性，而且能够实现多功能化。     

Computation of effective regge trajectories for high energy two-body reactions

Title of program: EFFECTIVE REGGE TRAJECTORIES Catalogue number: ABCE Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: IBM 360/67; Installation: Northumbrian Universities Multiple Access Computer, Durham, UK Operating system or monitor under which the program is executed: MICHIGAN TERMINAL SYSTEM Programming language used: FORTRAN IV High speed storage required: 46K words. No. of bits in a word: 32 Is the program overlaid? No No. of magnetic tapes required: None What other peripherals are used? Card Reader; Line Printer No. of cards in combined program and test deck: 1381 Card punching code: EBCDIC     

截面数据的B样条曲面重建研究

针对截面数据 ,研究其B样条曲面重建问题。给定节点矢量、依据最小二乘方法生成初始拟合曲面 ;为了提高拟合精度 ,采用迭代最近点方法优化修正数据点的参数 ,进而生成符合精度要求的拟合曲面。实际算例表明该算法简单、实用、可靠     

Removal of Salmonella Enteritidis from commercial unpasteurized liquid egg white using pilot scale cross flow tangential microfiltration

Effectiveness of a cross flow microfiltration (MF) process for removal of a cocktail of Salmonella enterica serovar Enteritidis species from commercial unpasteurized liquid egg white (LEW) from a local egg breaking plant, while maintaining its functional properties was evaluated. To facilitate MF, LEW was wedge screened, homogenized and then diluted (1:2 w/w) with distilled water containing 0.5% sodium chloride. Diluted unpasteurized LEW was inoculated with five strains of S. Enteritidis (ATCC 4931, ATCC BAA-708, ATCC 49215, ATCC 49218, and ATCC BAA-1045) to a level of approximately 10⁷ CFU/mL of LEW and microfiltered using a ceramic membrane. Process parameters influencing egg white functional properties and pathogen removal efficiency were evaluated. Average permeates flux increased by almost 126% when pH of LEW was adjusted from pH 8 to pH 7 at 25 °C. Microbial removal efficiency was at least, on average, 6.8 Log₁₀ CFU/mL (limit of detection ≤ 0.5 Log₁₀ CFU/mL). Functional property analysis indicated that the MF process did not alter the foaming power of LEW.     

真仙中茄调味酱流变特性研究

采用DV-Ⅲ+型粘度计对不同温度下真仙中茄调味酱的流变特性进行研究,结果表明,真仙中茄调味酱为典型的非牛顿型、剪切稀变型、胶变性流体,随着温度的升高,调味酱的触变性逐渐增强。同时,用Herschel-Bulkley方程和Cross方程描述调味酱的流变特性,发现Cross方程的拟合精度最高。温度对调味酱粘度的影响可以用阿累尼乌斯方程来描述,适用范围:温度28~68℃。     

Radiation‐Modified Carboxymethyl Starch Derivative as Metal Scavenger in Aqueous Solutions

Corn starch was chemically modified using sodium chloroacetate to yield carboxymethyl starch (CMS). The aqueous solutions of CMS at 15 and 50% (w/w) concentration were then irradiated by electron beam (EB) at various dosages (1, 2, 3, 5, 10, 20, and 50 kGy), resulting in a cross‐linked carboxymethyl starch (CCMS). The maximum gel fraction, i.e. the highest degree of cross‐linking, was achieved with a 50% (w/w) aqueous CMS solution irradiated at 2 kGy EB dosage. Metal removal efficiency of the CCMS was then evaluated for the extraction of copper (Cu) and cadmium (Cd) ions from aqueous solutions. Our results showed that the metal adsorption is pH dependent and the adsorption increases with increase of the pH of the metal solution from acidic towards neutral. The adsorption efficiency also showed the maximum value at the highest gel content, demonstrating the enhancement of adsorption by the physical entrapment of the ions in the CCMS network in addition to the primary chemical adsorption.