A case study of the generalized frame for the uniformity recognition of nonwovens

Previous work has shown that the uniformity recognition of nonwoven can be considered as a special case of pattern recognition. In this paper, a generalized frame for uniformity recognition based on computer vision and pattern recognition is introduced briefly. To validate the proposed generalized frame, a case study id carried out in experiment. In the experiment section, the uniformity recognition of nonwovens will be solved by unifying wavelet texture analysis, generalized Gaussian density (GGD) model and learning vector quantization (LVQ) neural network. 625 nonwoven images of 5 different uniformity grades, 125 of each grade, are decomposed at four levels with five different wavelet bases of Symlets family. And wavelet coefficients in each subband are independently modeled by the GGD model, while the scale and shape parameters of GGD model are extracted using maximum likelihood (ML) estimator as features to train and test LVQ neural network. For comparison, two energy-based features are also extracted from wavelet coefficients directly and jointly used as textural features. Experimental results coming from 625 nonwoven samples indicate the GGD parameters are more expressive and powerful in characterizing textures than the energy-based ones, especially when the number of decomposition levels is 4.     

Influence of α olefin polymer drag reduction agent concentration on the efficiency of drag reduction

The effects of an α olefin polymer drag reduction agent (DRA) created using solution polymerization on the efficiency of drag reduction are studied. The results show that α olefin polymer DRA begins to reduce drag when the concentration is 5 mg/L. Up to a constant value, the drag reduction percentage of the samples improves as the concentration increases. The drag reduction percentage drops rapidly as shearing times increase. The effects of polymer characteristics on drag reduction efficiency are further studied. Particle density and concentration are obtained through viscosimetry. The results show that with α olefin polymer DRA, the characteristic viscosity is lower, density is higher, particle concentration is lower, and molecular weight is higher resulting in improved drag reduction efficiency. Other conditions worsen drag reduction efficiency.     

伞裙追寄蝇滞育期间主要物质含量变化研究

为了明确伞裙追寄蝇滞育过程中主要抗寒物质及其含量的变化,对伞裙追寄蝇滞育期间主要物质总糖、蛋白质和脂类含量的变化进行了研究。结果表明,糖原含量在滞育期高于非滞育期的浓度,具有显著差异,且在蛹期达到最大值,分别为156.73μg/mg、68.32μg/mg,两者差异显著。在伞裙追寄蝇进入滞育之前,非滞育期蛋白质含量较高,在蛹期达到最大值为78.34μg/mg;滞育期则为72.95μg/mg,二者差异显著。滞育和非滞育成虫体内的甘油含量很低,在整个发育过程中,除蛹期外,其他各时期伞裙追寄蝇的甘油浓度在滞育期高于非滞育期,且差异均显著。比较各物质含量可知伞裙追寄蝇滞育时的主要抗寒物质是糖原。     

Effects of Fermentation Compound Herbal Medicine on Production Performance and Immune Function of Weaned Piglets

The feed additive was composed of six Chinese Herbal (CH) (including Poria, Astragalus, Cork, Orange peel, Hawthorn and Radix), which were fermented by Lactobacillus and used as a feed additive for piglets basal diet. Similar to group of antibiotic and herbal medicine, fermented herbal medicine was additived to basic diet in four trials with eight replications per trial, determining effect on the growth performance, biochemical and immunological indicators. Compared with the control group, the group of fermented herbal compound had higher Average Daily Gain (ADG), higher content of immune globulin M (IgM) and immune globulin A (IgA) (p<0.05). There was no significant effect on the indicators of ADG, Average Daily Feed Intake (ADFI) and diarrhea rate (p>0.05) between groups of antibiotic and fermented herbal were observed; however, the concentrations of Total Protein (TP), Growth Hormone (GH), IgG, IgM and IgA significantly increased (p<0.05) compared with the control group.     

Phenotypic and Genetic Characterization of Trifolium Rhizobia Isolated from Temperate and Subtropical Regions of China

The clovers that comprise Trifolium genus are naturalized in the subtropical and tropical zones in China.They are valuable bioresources as important green manures and pasture grass,which contribute biologically fixed dinitrogen (N2) and provide nutrition to farming systems.However,there are very few effective strains available for inoculant production and there is little information available about symbiotic rhizobia in Chinese legume clover root nodules.In this study,139 root nodule bacteria were isolated from two clover species (Trifolium repens and Trifolium pretense) growing in the subtropical and temperate regions of China,16S rRNA gene sequence analysis,BOX-PCR,whole cell protein SDS-PAGE,and nodulation tests were performed to characterize these strains.The results showed that phenotypic and genetic diversities among 139 isolates were large,with 83 protein patterns and 66 BOX-AIR profiles,respectively.The rhizobial strains were first divided into two large phenotypic protein groups.The sequencing strains representing the two groups were related to Rhizobium leguminosarum USDA2370T and R.sophorae CCBAU03386T and had 99.6％-100％ similarities.The phylogeny specificity of the rhizobia from clover was elucidated,while showed a large variation in the fingerprints of the phenotypes and genotypes and genetic diversity was high (revealed by Shannon diversity index,H').The rhizobial isolates from subtropical regions,such as Anhui Province,Yunnan Province and Hubei Province,had higher diversities than those from temperate areas,such as Hebei Province and Shanxi Province,which could be used to identify rhizobial strains from clover and screen efficient inoculum strains.A number of diverse rhizobial strains had been identified and a pool of currently available clover rhizobial strains were increased.This would ultimately increase the likelihood of identifying more efficient strains suited for developing a successful inoculation strategy for the production of white clover.     

Molecular characterization of melanin-concentrating hormone (MCH) in <Emphasis Type="Italic">Schizothorax prenanti</Emphasis>: cloning,tissue distribution and role in food intake regulation

Melanin-concentrating hormone (MCH) is a crucial neuropeptide involved in various biological functions in both mammals and fish. In this study, the full-length MCH cDNA was obtained from Schizothorax prenanti by rapid amplification of cDNA ends polymerase chain reaction. The full-length MCH cDNA contained 589 nucleotides including an open reading frame of 375 nucleotides encoding 256 amino acids. MCH mRNA was highly expressed in the brain by real-time quantitative PCR analysis. Within the brain, expression of MCH mRNA was preponderantly detected in the hypothalamus. In addition, the MCH mRNA expression in the S. prenanti hypothalamus of fed group was significantly decreased compared with the fasted group at 1 and 3 h post-feeding, respectively. Furthermore, the MCH gene expression presented significant increase in the hypothalamus of fasted group compared with the fed group during long-term fasting. After re-feeding, there was a dramatic decrease in MCH mRNA expression in the hypothalamus of S. prenanti. The results indicate that the expression of MCH is affected by feeding status. Taken together, our results suggest that MCH may be involved in food intake regulation in S. prenanti.     

网络选课与学分制管理系统的建立与应用

学分制教学是高校教学管理的一个必然趋势,但该制度的选课及管理非常复杂,网络选课与成绩管理系统就是为了适应学分制教学模式而开发的选课系统.通过对系统中不同角色的分析,建立了角色间的多对多关系,在对各类相似数据库功能比较分析的基础上,建立了本数据库管理系统.经测试,该管理系统可以较好地应用于特定模式的教学管理工作.     

In Vitro and In Vivo Anti-Inflammatory Effects of Sulfated Polysaccharides Isolated from the Edible Brown Seaweed,Sargassum fulvellum

In the present study, the in vitro and in vivo anti-inflammatory effects of the sulfated polysaccharides isolated from Sargassum fulvellum (SFPS) were evaluated in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages and zebrafish. The results indicated that SFPS improved the viability of LPS-stimulated RAW 264.7 macrophages from 80.02 to 86.80, 90.09, and 94.62% at the concentration of 25, 50, and 100 µg/mL, respectively. Also, SFPS remarkably and concentration-dependently decreased the production levels of inflammatory molecules including nitric oxide (NO), tumor necrosis factor-alpha, prostaglandin E₂, interleukin-1 beta, and interleukin-6 in LPS-treated RAW 264.7 macrophages. In addition, SFPS significantly inhibited the expression levels of cyclooxygenase-2 and inducible nitric oxide synthase in LPS-treated RAW 264.7 macrophages. Furthermore, the in vivo test results indicated that SFPS improved the survival rate of LPS-treated zebrafish from 53.33 to 56.67, 60.00, and 70.00% at the concentration of 25, 50, and 100 µg/mL, respectively. In addition, SFPS effectively reduced cell death, reactive oxygen species, and NO levels in LPS-stimulated zebrafish. Taken together, these results suggested that SFPS possesses strong in vitro and in vivo anti-inflammatory activities, and could be used as an ingredient to develop anti-inflammatory agents in the functional food and pharmaceutical industries.