利用局部相似和小波变换的图像压缩算法

为了减少小波变换的运算量,且当图像尺寸增大时,相应的运算量急剧增大的情况,提出了一种新的压缩算法。该算法首先利用图像的局部相似性和仿射关系构建碎片库,然后对碎片库进行小波变换压缩;仿真实验表明,碎片库所含像素点数远少于图像像素点数,且碎片库尺寸并不随图像尺寸的增大而明显增大。该算法有效提高了压缩率,减少了小波变换的运算量。     

基于高通量测序的陶融型大曲微生物群落结构分析

利用高通量测序技术研究成品陶融型大曲的微生物群落结构,并与大曲的理化性质进行相关性分析.结果 表明:大曲中共检测到83个细菌可操作分类单元(operational taxonomic units,OTU),主要细菌类群为厚壁菌门(Firmicutes)占79.15％、变形菌门(Proteobacteria)占15.30...     

Phytochemicals and antioxidant activity of fruits and leaves of paprika (Capsicum Annuum L., var. special) cultivated in Korea

The phytochemical composition of carotenoids, tocopherols, free sugars, organic acids, L-ascorbic acid, capsaicinoids, and flavonoids in green and red paprika (GP and RP), and paprika leaves (PL) cultivated in Korea were analyzed. The ethanolic extracts of GP, RP, and PL were obtained with 80% ethanol, and their antioxidative activities were determined by measuring their ABTS and DPPH radical scavenging activities. RP showed the highest contents of capsanthin (58.33 ± 3.91 mg/100 g dry weight) and L-ascorbic acid (1987.25 ± 19.64 mg/100 g dry weight), and main compounds of PL were lutein, chlorophyll, and γ-tocopherol (96.91 ± 14.58, 2136.71 ± 21.11, and 723.49 ± 54.10 mg/100 g dry weight, respectively). RP showed the strongest antioxidant activity (IC(50) = 55.23 ± 6.77 μg/mL in a 2, 2'-azino-di-[3-ethylbenzthiazoline sulphonate] assay and 150.40 ± 8.07 μg/mL in a 2, 2-diphenyl-2-picrylhydrazyl assay), and the antioxidant activity of PL was higher than β-carotene but lower than RP. The results indicate that the amounts of capsanthin and L-ascorbic acid in RP correlate well with antioxidant activity. PL, which has various phytochemicals such as lutein, chlorophyll, and γ-tocopherol, might be used in nutraceuticals and pharmaceuticals for improving human health.     

A Fully Integrated CMOS Security‐Enhanced Passive RFID Tag

A fully integrated CMOS security‐enhanced passive (SEP) tag that compensates the security weakness of ISO/IEC 18000‐6C is presented in this paper. For this purpose, we propose a security‐enhanced protocol that provides mutual authentication between tag and reader. We show that the proposed protocol meets the security demands of the ongoing international standard for RFID secure systems, ISO/IEC 29167‐6. This paper fabricates the SEP tag with a 0.18‐µm CMOS technology and suggests the optimal operating frequency of the CMOS SEP tag to comply with ISO/IEC 18000‐6C. Furthermore, we measure the SEP tag under a wireless environment. The measured results show that communications between the SEP tag and reader are successfully executed in both conventional passive and SEP modes, which follow ISO/IEC 18000‐6C and the proposed security enhanced protocol, respectively. In particular, this paper shows that the SEP tag satisfies the timing link requirement specified in ISO/IEC 18000‐6C.     

Nature of ammonium ion adsorption by sepiolite: analysis of equilibrium data with several isotherms

Adsorption isotherms for an ammonium ion-sepiolite system have been established for initial ammonium ion solution concentrations in the range of 8.32-388.06 mmol NH(4)(+)/L (150-7000 ppm). The change of the "g sepiolite/mL solution" ratios from 1/10 to 1/70 caused an increase in the adsorption from 1.82 to 3.70 mmol NH(4)(+)/g for the average particle size of 2.8mm. The equilibrium data were fitted to "general-purpose isotherms" and "first-order adsorption model", and the adjustable parameters of the isotherms were estimated by nonlinear least-squares analysis. Langmuir and Freundlich models were found insufficient to explain the adsorption equilibrium, while Langmuir-Freundlich and Tooth isotherms explained the data well. Goodness of fit increased with the increased sepiolite quantity in the treated suspension.     

Effect of licorice (Glycyrrhiza uralensis fisch) on amyloid-β-induced neurotoxicity in PC12 cells

Alzheimer’s disease is characterized by neuronal loss and the presence of extracellular senile plaques whose major constituent is amyloid-β peptide (Aβ). In this study, we investigated the effects of a water extract of licorice (Glycyrrhiza uralensis F.) (GWE) on Aβ25-35-induced apoptosis in PC12 cells. Exposure to Aβ25-35-induced apoptosis, such as decreased mitochondrial transmembrane potential, increased lipid peroxide formation, decreased antiapoptotic bcl-2 and poly(ADP-ribose) polymerase, and elevated proapoptotic bax, and caspase-3. However, treatment of GWE effectively decreased cell deaths evoked by Aβ25-35. This result suggests that GWE exerts protective effect against apoptotic neuronal cell death induced by Aβ fragments.     

嵌入式技术在电力系统中的应用

介绍了嵌入式系统的定义、特点及其硬、软件资源,尤其是嵌入式在电力系统中运用的重要意义;介绍了嵌入式在数据采集与监控（SCADA）、微机保护、电力系统自动装置、电费计量、电力信息网络安全隔离、电力系统遥视、远程监控等方面的广泛应用。最后,指出了嵌入式在电力系统的可扩展性、实时性、可靠性、网络通信能力、人机接口等方面有很好的发展前景。     

Anti-diabetic effect of watermelon (Citrullus vulgaris Schrad) on Streptozotocin-induced diabetic mice

The anti-diabetic potential of watermelon (Citrullus vulgaris Schrad) was evaluated in vivo. ICR mice were fed experimental diet containing none, 10% watermelon flesh powder (WM-P) or 1% watermelon rind ethanol extract (WM-E). At the end of 4 weeks, mice were administrated with streptozotocin (40 mg/kg, i.p.) for 5 consecutive days to induce diabetes. Supplementation with WM-E significantly decreased blood glucose level and increased serum insulin levels. Feeding of WM-P also induced moderate changes but those were not statistically significant. Immunohistochemical analysis showed watermelon effectively protected pancreatic cells death. These results suggest that watermelon has a beneficial effect on diabetes.     

Minimizing flowtime and maximum earliness on a single machine

We consider the bicriteria scheduling problem of minimizing flowtime and maximum earliness on a single machine. The problem is known to be NP-hard. We develop heuristic procedures for generating all efficient sequences for the cases where machine idle time is either allowed or not allowed. For both cases we also discuss an algorithm that finds the best of the approximately efficient sequences for a given objective function by generating only a small subset of those sequences. We present computational results which demonstrate that the heuristic procedures and the algorithms perform very well.     

Changes in FA composition and antioxidative activity of pigment extracts from Korean red pepper powder (Capsicum annuum L.) Due to processing conditions

The FA compositions by parts of Korean red pepper (Capsicum annuum L.) were analyzed, and the changes in FA composition and antioxidative activity in pigment extracts due to processing were investigated. The main FA in the pericarp and seeds were palmitic, oleic, and linoleic acids. Linoleic acid in the seeds was 73.9% of the total FA, or about 1.7 times as much as in the pericarp. Linolenic acid was scarcely present in the seeds. The percentages of unsaturated FA in the pericarp and seeds were 73.3 and 83.2, respectively. The ratios among FA varied according to the processing conditions, but the FA compositions themselves remained approximately the same. The antioxidative activity of pigment extracts in the photooxidation of linoleic acid was measured by monitoring oxygen consumption and conjugated diene formation. Changes in drying methods resulted in significant differences in antioxidative activity, but changes in storage conditions had little effect. Conjugated diene formation and oxygen consumption were positively correlated. An improved drying method could allow the antioxidative activity of red pepper pigments to be conserved.