三洋新力电子照相机简介

概述了三洋/新力电子照相机的整机概念及其包括的摄像机、放像机与音频单元等组成部分的原理。     

Evaluation of microbially influenced corrosion with electrochemical noise analysis and signal processing

Corrosion behaviors of stainless steel (SS304), with attached Acidithiobacilus ferrooxidans (ATF) bacteria and exposed to three different types of artificial saliva solutions, namely: (1) Jenkin's solution, (2) Tomasi's solution, and (3) NaCl solution, have been monitored using electrochemical noise (ECN) analysis and signal processing techniques. The ECN data has been analyzed in time and frequency domains, and the time-domain analysis was used to calculate parameters such as skewness, kurtosis and noise resistance, R_n. The corrosion mechanisms were analyzed in terms of the ranges of skewness and kurtosis. The frequency analysis showed that the conventional fast Fourier transforms (FFT) method failed to differentiate among the ECN signals obtained in different solutions with and without the attachment of bacteria. Therefore, the fractional Fourier transform (FrFT) was introduced to process ECN signals and has been demonstrated as a better tool to describe the corrosion behaviors of electrodes in different solutions.     

汽车自动变速器油质异常的原因及预防措施

介绍了汽车自动变速器油质检查的正确方法，详细地分析了汽车自动变速器油质异常的原因以及预防汽车自动变速器油早期变质的一些具体措施。     

基于LabVIEW和Atmega16的GAL16V8编程器的制作

介绍一种由PC机USB串口发送数据到Atmega16单片机并由Atmega16控制编程的GAL16V8编程器的制作。详述了GAL16V8烧录器的硬件电路的设计,单片机Atmega16如何根据指令进行烧录,以及用软件LabVIEW实现编程数据顺序的调整。该编程器实现了对LATTICE公司的GAL16V8B、GAL16V8D与ATMEL公司的ATF16V8B的不同烧录指令,适用于实验教学。     

Genetic analysis of geraniol metabolism during fermentation

Geraniol produced by grape is the main precursor of terpenols which play a key role in the floral aroma of white wines. We investigated the fate of geraniol during wine fermentation by Saccharomyces cerevisiae. The volatile compounds produced during fermentation of a medium enriched with geraniol were extracted by Stir-bar sorptive extraction and analysed by GC–MS. We were able to detect and quantify geranyl acetate but also citronellyl- and neryl-acetate. The presence of these compounds partly explains the disparition of geraniol. The amounts of terpenyl esters are strain dependant. We demonstrated both by gene overexpression and gene-deletion the involvement of ATF1 enzyme but not ATF2 in the acetylation of terpenols. The affinity of ATF1 enzyme for several terpenols and for isoamyl alcohol was compared. We also demonstrated that OYE2 is the enzyme involved in geraniol to citronellol reduction. Fermenting strain deleted from OYE2 gene produces far less citronellol than wild type strain. Moreover lab strain over-expressing OYE2 allows 87% geraniol to citronellol reduction in bioconversion experiment compared to about 50% conversion with control strain.     

耐事故燃料包壳用FeCrAl不锈钢的研究进展

3.11日本福岛核事故后,国内外围绕提高核燃料元件的事故包容能力和固有安全性课题开展了大量的耐事故燃料(ATF)的研发工作,其中性能更先进的包壳材料是ATF研究的前沿和难点。Fe Cr Al合金优良的高温性能结合管材制备工艺的技术成熟度和经济性,促使该合金包壳成为近期ATF包壳研发的首选目标。简介了国外在ATF包壳候选材料的筛选和Fe Cr Al不锈钢上的研究进展,综述了ATF包壳用Fe Cr Al不锈钢高温蒸汽氧化性能、力学性能、中子辐照性能和应力腐蚀性能等方面的研究现状,指出了Fe Cr Al包壳研制和工程应用等方面需突破的关键技术和研究方向,其中成分优化控制及制备工艺、中子辐照性能和应力腐蚀性能等工程应用的评价是未来研究的重点和难点。     

Construction of a URA3 deletion strain from the allotetraploid bottom-fermenting yeast Saccharomyces pastorianus

The bottom‐fermenting lager yeast Saccharomyces pastorianus has been proposed to be allotetraploid, containing two S. cerevisiae (Sc)‐type and two S. bayanus (Sb)‐type chromosomes. This chromosomal constitution likely explains why recessive mutants of S. pastorianus have not previously been reported. Here we describe the construction of a ura3 deletion strain derived from the lager strain Weihenstephan34/70 by targeted transformation and subsequent loss of heterozygosity (LOH). Initially, deletion constructs of the Sc and Sb types of URA3 were constructed in laboratory yeast strains in which a TDH3p‐hygro allele conferring hygromycin B resistance replaced ScURA3 and a KanMX cassette conferring G‐418 resistance replaced SbURA3. The lager strain was then transformed with these constructs to yield a heterozygous URA3 disruptant (ScURA3⁺/Scura3Δ::TDH3p‐hygro, SbURA3⁺/Sbura3Δ::KanMX), which was plated on 5‐fluoroorotic acid (5‐FOA) plates to generate the desired Ura^– homozygous disruptant (Scura3Δ::TDH3p‐hygro/Scura3Δ::TDH3p‐hygro Sbura3Δ::KanMX/Sbura3Δ::KanMX) through LOH. This ura3 deletion strain was then used to construct a bottom‐fermenting yeast transformant overexpressing ATF1 that encodes an enzyme that produces acetate esters. The ATF1‐overexpressing transformant produced significantly more acetate esters than the parent strain. The constructed ura3? lager strain will be a useful host for constructing strains of relevance to brewing. Copyright © 2012 John Wiley & Sons, Ltd.     

三维大地形下的飞行航迹优化仿真

三维大地形对空中飞行航迹有很大的影响,不同的飞行航迹在很大程度上影响空中交通流量(ATF).以最优飞行航迹为背景,增大空中交通流量为目的,介绍了三维大地形模型的生成方法和步骤,并模拟出真实环境下的三维大地形模型.针对飞行路径对飞行航迹的影响,在该模型上加入影响飞行的其他自然要素,如能见度、风向风速、降雨量、云底高等.将此虚拟的飞行环境中生成的飞行航迹优化,尽量避免自然因素对飞行航迹的影响,优化之后相同时间段内通过相同航域的飞机架数增加了,从而增大了空中交通流量.     

自动变速器油与自动变速器故障分析

自动变速器（AT）的故障以液力换挡控制系统最多,而液压控制系统故障,究其原因主要是自动变速器油（ATF）引起的,所以在选用自动变速器油时,不能忽视油液对自动变速器工作性能的影响,笔者对油质变化与自动变速器故障进行对比分析,有利于维修工对车辆故障进行判断,同时提醒车主加强和重视车辆保养。