Digital Doppelgängers: Future Scanscapes

Over the course of the last two years, ScanLAB Projects have explored various fragments of the natural and man-made world through the eyes of their forensic measuring machine. From surface mapping of Arctic ice floes in the Fram Strait (gateway to the Arctic) to the documentation of torture and detention sites in the Balkans, via the accidental editing of a Richard Long sculpture, to purposeful acts of detail theft from Foster and Wren. Here, Matthew Shaw and William Trossell discuss the capture, analysis and refabrication of their digital architectural doppelgängers.     

耐盐乳酸菌和酵母菌强化技术对高盐稀态发酵酱醪品质的影响

分别将耐盐乳酸菌Tetragenococcus halophilus CGMCC 3792、耐盐酵母菌Zygosaccharomyces rouxii CGM-CC 3791和Candida versatilis CGMCC 3790菌悬液接入酱醪中,利用顶空-固相微萃取偶联气质联用技术(HS-SPME/GC-MS)检测了发酵125 d酱醪中挥发性组分的变化。研究结果表明,T.halophilus CGMCC 3792强化的酱醪中酸类、醇类、酮类、呋喃类、吡嗪类和其他组分的相对含量降低,酯类、醛类和酚类组分的相对含量增加,其中苯乙醇、乙酸乙酯、辛酸乙酯、癸酸乙酯和4-乙基愈创木酚等的相对含量显著增加,而Z.rouxii CGMCC 3791、C.versatilis CGMCC 3790共培养强化的酱醪中醇类、酯类、醛类和其他组分的相对含量增加,酸类、酚类、呋喃类和吡嗪类组分的相对含量降低,其中苯乙醇、长链脂肪酸乙酯(月桂酸乙酯、棕榈酸乙酯、亚油酸乙酯等)的相对含量显著增加。此外,本研究中T.halophilus CGMCC 3792强化的酱醪中4-乙基愈创木酚的相对含量大幅增加,且在整个发酵过程中其含量也单调增加,对于T.halophilus CGMCC 3792是否具有分泌4-乙基愈创木酚的能力以及是否冷温工艺赋予该菌株合成4-乙基愈创木酚的能力需进一步探究。     

Lactic Acid Bacteria Isolated from Indigenous Fermented Bamboo Products of Arunachal Pradesh in India and Their Functionality

Ekung, eup and hirring are some common indigenous fermented bamboo products of Northeast India. We have isolated, characterized, and identified the predominant lactic acid bacteria (LAB) from 44 samples of ekung, eup, and hirring and studied their technological properties. The phenotypic characterizations of LAB isolates were based on physiological, biochemical tests and API kits, and were identified as Lactobacillus plantarum, L. brevis, L. casei, L. fermentum, Lactococcus lactis, and Tetragenococcus halophilus. Technological properties of LAB such as acidifying capacity, antimicrobial activities, degradation of phytic acid and oligosaccharides, bile-salt tolerance, enzymatic activities, biogenic amines production, and degree of hydrophobicity also were studied. This study showed that strains of LAB played important roles by their functional properties related to acidifying capacity, degradation of antinutritive factors, tolerance to bile-salt, wide enzymatic activities, and nonproducers of biogenic amines. Understanding the biological and biochemical basis of indigenous knowledge of the ethnic people of Northeast India for production of nonperishable bamboo shoots by lactic acid fermentation has merit. It helps to develop both low-cost functional foods, and understand the functionality of microbial diversity. Some of the LAB strains possess functional properties, which render them interesting candidates for use as LAB starter cultures.     

基于LAB彩色空间的数字水印技术

为了防止彩色图像印刷行业的盗版,提出选择LAB彩色空间嵌入数字水印,且在LAB彩色空间的L分量嵌入数字水印比在B分量更合适。通过实验说明给出的彩色图像数字水印技术算法对常用的图像处理如剪切、加噪和滤波等攻击具有较好的鲁棒性、不可见性。     

培养条件对二株猪源产细菌素 乳酸菌抑菌活性的影响

考察了温度,培养基起始pH值对R－21－1,R－17－3二株来自猪肠道能够抑制大肠杆菌的产细菌素乳酸菌抑菌活性的影响,并且用正交试验考察了温度,培养基起始pH值,培养时间三因素对R－21和R－17－3抑菌活性影响的最佳组合。结果表明：对R－21和R－17－3,pH值,温度,培养时间三因素的主次顺序均依次为pH值＞温度＞时间;R－21－1的最佳组合为pH=5.5,41℃,24h,R-17-3的最佳组合为pH=5.0,41℃,24h.     

基于超像素的图像语义区域引导的色彩迁移

针对图像色彩处理技术,提出基于超像素的图像色彩迁移方法,其以图像语义区域进行引导,以LAB色彩空间进行映射。首先,采用K-means和SLIC算法对输入图像进行分割;其次,对每一子区域块进行区域协方差处理,获得其二阶语义特征并生成超像素,并利用相似度测量函数构造相似矩阵,对区域块聚类可生成图像超像素;最后,再对图像内语义信息相似的像素基于LAB空间映射,完成色彩迁移。结果显示,该方法具有处理复杂图像能力较高及颜色迁移效果准确的优点。     

基于USB3.0的数据采集系统在电力电子中的应用

针对电力电子装置产生大量的谐波,以及当前数据采集系统要求的精度高、速度快、路数多的特点,将基于USB3.0的多通道数据采集系统应用于电力电子系统。该系统以FPGA作为主控器,对多路模拟开关和模数转换器进行采集控制;设计了双端口RAM存储ADC的输出数据,并作为USB3.0接口的前端缓存;并编写了LAB view数据显示和处理程序。测试结果表明：系统实现了逆变电路电压电流数据的可靠采集、高速稳定传输和显示处理。     

烷基苯SO_3磺化工艺改进

在采用烷基苯SO3磺化工艺制造烷基苯磺酸过程中,许多装置会遇到含量、色泽不稳定的问题。通过对某合成洗涤剂厂烷基苯SO3磺化设备、工艺等因素的研究分析,对生产工艺进行了系统改进,烷基苯磺酸含量稳定在96%以上,色泽稳定在30klett以下。     

Sulfonation with SO3: Relative reactivity of commercial alkylbenzene components

Commercial linear alkylbenzene components, such as linear alkylbenzene homologs and isomers, branched alkylbenzene and dialkyltetralins, have been synthesized and isolated. Equimolar mixtures have been prepared, and their relative velocities during the sulfonation reaction have been established.