抗SPA的多点乘算法

SPA（Simple Power Analysis）攻击可能通过泄露的信息获取内存受限制的设备中的密钥，它是通过区分一次点乘运算中点加运算和倍点运算进行的。抗SPA攻击的点乘算法较多，但对于多点乘算法相关措施较少。Sharmir—NAF多点乘算法是一个时间和空间效率都非常优秀的多点乘算法。为此提出一种基于Sharmir—NAF的抗SPA攻击的多点乘算法。新的算法在内存空间消耗和计算速度上较原算法负担增加可以忽略不计，而且能够抗SPA攻击。     

Joint Source-Channel Decoding of Huffman codes with LDPC codes

In this paper, we present a Joint Source-Channel Decoding algorithm （JSCD） for Low-Density Parity Check （LDPC） codes by modifying the Sum-Product Algorithm （SPA） to account for the source redundancy, which results from the neighbouring Huffman coded bits. Simulations demonstrate that in the presence of source redundancy, the proposed algorithm gives better performance than the Separate Source and Channel Decoding algorithm （SSCD）.     

集对综合评价模型在水库优化调度方案决策中的应用

水库优化调度方案决策是具有多目标、多属性的复杂决策过程。应用集对分析同一度综合评价模型对洮河九甸峡水库11个调度方案进行决策优选,经分析检验结果合理,且计算简便、实用,是一种有效的决策优选方法,对决策者有很好的指导作用。     

基于组织 性能预测的集装箱热轧板工艺优化

 针对产品的性能要求制定合理的热轧工艺,提出将组织性能预测与控制技术应用于热轧工艺的优化设计。基于大量生产数据,建立了包含10个BP神经网络的模型组以描述化学成分、工艺和力学性能的对应关系,屈服强度、抗拉强度和伸长率的预测精度分别达到了±6%、±6%和±4%。结合多目标粒子群优化算法,针对客户对性能的需求,在化学成分和工艺约束已知的条件下,对热轧工艺进行了优化计算。工艺优化计算结果与现场生产数据吻合良好,验证了工艺优化设计的有效性,从而为热轧最优工艺设计提供指导。     

SPA方法快速检验食品志贺氏菌的研究

ＳＰＡ（ＳｔａｐｈｙｌｏｃｏｃｃａｌＰｒｏｔｅｉｎＡ）是某些金黄色葡萄球菌细胞壁的一种蛋白质成分,具有同人和多种哺乳动物ＩｇＧ分子Ｆｃ段结合的能力。本方法用含Ａ蛋白丰富的金黄色葡萄球菌菌体与志贺氏菌属抗血清在一定条件下混合致敏,让抗体结合到金黄色葡萄球菌细胞壁Ａ蛋白上,制成ＳＰＡ诊断试剂。样品经过增菌后,即可用ＳＰＡ诊断试剂来检验。由于金黄色葡萄球菌表面丰富的Ａ蛋白能结合大量抗体,大大提高了检验方法的敏感性,缩短了检验周期     

Ag、Au纳米颗粒的激光表面修饰

通过用Nd：YAG激光（λ=1064nm）对氧化还原法制备的Ag、Au纳米颗粒的修饰,使Ag、Au纳米颗粒的尺寸均匀性得到更好的改善。用透射电子显微镜（TEM）和紫外-可见表面等离于体吸收（SPA）光谱对激光修饰后的Ag、Au纳米颗粒进行了测量和表征,结果表明,这些被修饰过的Ag、Au纳米颗粒由于自身体系发生了改变,可以作为更高效表面增强拉曼光谱（SERS）的增强基底。     

Characterization of fatty acid isomers in dehydrated castor oil by gas chromatography and gas chromatography-mass spectrometry techniques

Fatty acid isomers present in dehydrated castor oil were analyzed by gas chromatography and gas chromatography-mass spectrometry (GC-MS) of their dimethyl oxazoline derivatives. Conjugated linoleic acid 9,11 and 10,12 isomers were identified by GC based on equivalent chainlengths. Segmental peak analysis of GC-MS total ion chromatogram mass fragmentation pattern revealed the presence of 7,9 and 8,10 conjugated linoleic acids along with 9,11 and 10,12 conjugated linoleic acids. Interestingly, a reverse elution of trans,trans-conjugated linoleic acids was observed, viz. 10,12 was followed by 9,11, which was in turn followed by the 8,10 and 7,9 isomers. The observed reverse order of elution was in contrast to the conventional elution pattern of both nonconjugated and conjugated cis,cis-, cis,trans- and trans,cis-isomers.     

Classification of Black Beans Using Visible and Near Infrared Hyperspectral Imaging

A rapid and non-destructive method based on the visible and near infrared hyperspectral imaging technique in the wavelength range of 390–1050 nm was investigated for discriminating the varieties of black beans. In total, 300 samples of three varieties were scanned by the visible and near infrared hyperspectral imaging system, and hyperspectral data were analyzed by spectral and image processing technique respectively. A successive projection algorithm was used to obtain 13 characteristic wavelengths (504, 507, 512, 516, 522, 529, 692, 733, 766, 815, 933, 998, and 1000 nm) for spectral analysis. After the processing of successive projection algorithm, optimal image selection was carried out by principal component analysis based on the characteristic wavelengths. The first principal component image was used for the image analysis, whose contribution rate was over 98.34%. Gray level co-occurrence matrix analysis from first principal component image was applied to extract image features including 16 textural features and six morphological features. In this study, partial least squares-discriminate analysis, support vector machine, and K-nearest neighbors were used for model establishments, respectively, based on spectral feature, image feature, and the combination of spectral and image features. The results show that the best correct discrimination rate of 98.33% was achieved by applying combined spectral and image features. The study demonstrated that visible and near infrared hyperspectral imaging technique was potential for rapid classification of black beans, and the performance of the classification model can be improved by the feature combination.     

绿色建材的SPA优选

基于可持续发展观念的绿色建筑,首先必须考虑建筑材料的"4R"原则、本土观念及系统工程特性,因此,绿色建材的选用是绿色建筑的核心问题。通过分析绿色建材选用存在的问题,提出采用SPA法对绿色建材进行优选。并以绿色建材混凝土的优选为例进行分析计算,结果表明该方法操作方便、计算简明、快速便捷,计算结果较为客观,可信度高,对绿色建材的优选具有较强的实用性。     

基于故障树分析法的识别单元可靠性分析

将集对分析(Set Pair Analysis,SPA)、联系数(Connection Number,CN)与故障树理论相结合,分析信函分拣系统的识别模块故障的设备原因和人为因素,将系统或部件常介于故障与非故障之间的状态体现出来,从定量和定性两方面对信函分拣系统的识别单元进行可靠性分析,并就分析结果提出相关的改进和维护方案。研究的现实意义在于为高可靠、易于重构的优化信函分拣系统提供改进依据,为现阶段使用的设备维护、维修提供方便快捷的解决策略。