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Now showing items 1 - 16 of 164

  • LED LAMP AND INSTALLATION METHOD FOR LED LAMP

    A light-emitting diode (LED) lamp and an installation method for the LED lamp; the LED lamp comprises a lamp holder (1), and a lampshade (3) mounted on the lamp holder (1); a printed circuit board (PCB) (2) is provided between the lamp holder (1) and the lampshade (3), and the PCB (2) is provided thereon with a light source assembly; the lampshade (3) is integrally formed. By means of adopting a modular design for each component of the LED lamp, installation of the LED lamp becomes convenient and fast. Moreover, after employing a modular design, each module of the LED lamp may be directly used for separate sale, thus making modular after-sales services a reality.
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  • Domain Regeneration for Cross-Database Micro-Expression Recognition

    Zong, Yuan   Zheng, Wenming   Huang, Xiaohua   Shi, Jingang   Cui, Zhen   Zhao, Guoying  

    Recently, micro-expression recognition has attracted lots of researchers' attention due to its potential value in many practical applications, e.g., lie detection. In this paper, we investigate an interesting and challenging problem in micro-expression recognition, i.e., cross-database micro-expression recognition, in which the training and testing samples come from different micro-expression databases. Under this problem setting, the consistent feature distribution between the training and testing samples originally existing in conventional micro-expression recognition would be seriously broken, and hence, the performance of most current well-performing micro-expression recognition methods may sharply drop. In order to overcome it, we propose a simple yet effective framework called domain regeneration (DR) in this paper. The DR framework aims at learning a domain regenerator to regenerate the micro-expression samples from source and target databases, respectively, such that they can abide by the same or similar feature distributions. Thus, we are able to use the classifier learned based on the labeled source micro-expression samples to predict the label information of the unlabeled target micro-expression samples. To evaluate the proposed DR framework, we conduct extensive cross-database micro-expression recognition experiments designed based on the Spontaneous Micro-Expression Database and Chinese Academy of Sciences Micro-Expression II Database. Experimental results show that compared with the recent state-of-the-art cross-database emotion recognition methods, the proposed DR framework has more promising performance.
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  • Proteomic Analysis of Vibrio parahaemolyticus Under Cold Stress.

    Tang, Jing   Jia, Juntao   Chen, Ying   Huang, Xiaohua   Zhang, Xiaoliang   Zhao, Liqing   Hu, Wei   Wang, Changjun   Lin, Chao   Wu, Zhenxing  

    Vibrio parahaemolyticus is a kind of food-borne pathogenic bacterium, which can seriously infect food, especially seafood causing gastroenteritis and other disease. We studied the global proteome responses of V. parahaemolyticus under cold stress by nano-liquid chromatography-tandem mass spectrometry to improve the present understanding of V. parahaemolyticus proteomics events under cold stress. A total of 1151 proteins were identified and 101 proteins were differentially expressed, of which 69 were significantly up-regulated and 32 were downregulated. Functional categorization of these proteins revealed distinct differences between cold-stressed and control cells. These proteins were grouped into 21 functional categories by the clusters of orthologous groups (COG) analysis. The most of up-regulated proteins were functionally categorized as nucleotide transport and metabolism, transcription, function unknown, and defense mechanisms. These up-regulated proteins play an important role under cold stress.=20
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  • LED LAMP TUBE

    Disclosed is an LED lamp tube with a tube diameter of 11 mm - 24 mm. The LED lamp tube comprises: an LED assembly (8), a heat dissipation tube (9), a lamp cover (7), and a drive power supply assembly (12). The LED assembly (8) comprises a first circuit board (81) and an LED (82) disposed on the first circuit board (81). The heat dissipation tube (9) is disposed below the first circuit board (81). The lamp cover (7) is sheathed on the LED assembly (8). The drive power supply assembly (12) is disposed in the heat dissipation tube (9). The drive power supply assembly (12) comprises: a second circuit board (121), a transformer (123) disposed on the second circuit board (121), and a plurality of elements. The transformer (123) comprises a main frame (1231) and a magnetic core assembly (1232). The main frame (1231) comprises a winding portion and lead portions arranged at two ends of the winding portion. The axial length of the winding portion is 16 mm - 24 mm. An avoidance structure (1233) is provided at the edge of the magnetic core assembly (1232) to reduce the width of an upper part of the magnetic core assembly (1232) so as to avoid the heat dissipation tube (9). The LED lamp tube with a tube diameter of 11 mm - 24 mm can still be applied to a lamp holder of G5 standard even when the drive power supply assembly is added.
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  • Passively Q-switched multi-wavelength Nd:YVO4 self-Raman laser

    Lin, Hongyi   Huang, Xiaohua   Sun, Dong   Liu, Xiao  

    Multi-wavelength self-Raman laser from a passively Q-switched c-cut Nd:YVO4 laser at 1066.8 nm to four discrete Stokes lines at 1097.2, 1129.2, 1168.3 and 1178.8 nm is demonstrated simultaneously for the first time. With a 0.27 at% c-cut Nd:YVO4 crystal, the total output power of Stokes lines is 267 mW at a pump power of 5.0 W.
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  • DUPLICATING DNA WITH CONTIGUITY BARCODES FOR GENOME AND EPIGENOME SEQUENCING

    Provided herein are methods and devices for accurate sequencing and detection of epigenetic information from template polynucleotides. Also provided are methods for long-range strand displacement amplification of polynucleotides, microfluidic devices with selectively permeable barriers for multistep processing, and methods for polynucleotide amplification using the microfluidic devices.
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  • Arabinogalactan protein–rare earth element complexes activate plant endocytosis

    Wang, Lihong   Cheng, Mengzhu   Yang, Qing   Li, Jigang   Wang, Xiang   Zhou, Qing   Nagawa, Shingo   Xia, Binxin   Xu, Tongda   Huang, Rongfeng   He, Jingfang   Li, Changjiang   Fu, Ying   Liu, Ying   Bao, Jianchun   Wei, Haiyan   Li, Hui   Tan, Li   Gu, Zhenhong   Xia, Ao   Huang, Xiaohua   Yang, Zhenbiao   Deng, Xing Wang  

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  • Ratiometric optical nanoprobes enable accurate molecular detection and imaging

    Huang, Xiaolin   Song, Jibin   Yung, Bryant C.   Huang, Xiaohua   Xiong, Yonghua   Chen, Xiaoyuan  

    Exploring and understanding biological and pathological changes are of great significance for early diagnosis and therapy of diseases. Optical sensing and imaging approaches have experienced major progress in this field. Particularly, an emergence of various functional optical nanoprobes has provided enhanced sensitivity, specificity, targeting ability, as well as multiplexing and multimodal capabilities due to improvements in their intrinsic physicochemical and optical properties. However, one of the biggest challenges of conventional optical nanoprobes is their absolute intensity-dependent signal readout, which causes inaccurate sensing and imaging results due to the presence of various analyte-independent factors that can cause fluctuations in their absolute signal intensity. Ratiometric measurements provide built-in self-calibration for signal correction, enabling more sensitive and reliable detection. Optimizing nanoprobe designs with ratiometric strategies can surmount many of the limitations encountered by traditional optical nanoprobes. This review first elaborates upon existing optical nanoprobes that exploit ratiometric measurements for improved sensing and imaging, including fluorescence, surface enhanced Raman scattering (SERS), and photoacoustic nanoprobes. Next, a thorough discussion is provided on design strategies for these nanoprobes, and their potential biomedical applications for targeting specific biomolecule populations (e.g. cancer biomarkers and small molecules with physiological relevance), for imaging the tumor microenvironment (e.g. pH, reactive oxygen species, hypoxia, enzyme and metal ions), as well as for intraoperative image guidance of tumor-resection procedures.
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  • Multi-modal emotion analysis from facial expressions and electroencephalogram

    Huang, Xiaohua   Kortelainen, Jukka   Zhao, Guoying   Li, Xiaobai   Moilanen, Antti   Seppanen, Tapio   Pietikainen, Matti  

    Automatic analysis of human spontaneous behavior has attracted increasing attention in recent years from researchers in computer vision. This paper proposes an approach for multi-modal video-induced emotion recognition, based on facial expression and electroencephalogram (EEG) technologies. Spontaneous facial expression is utilized as an external channel. A new feature, formed by percentage of nine facial expressions, is proposed for analyzing the valence and arousal classes. Furthermore, EEG is used as an internal channel supplementing facial expressions for more reliable emotion recognition. Discriminative spectral power and spectral power difference features are exploited for EEG analysis. Finally, these two channels are fused on feature level and decision-level for multi-modal emotion recognition. Experiments are conducted on MAHNOB-HCI database, including 522 spontaneous facial expression videos and EEG signals from 27 participants. Moreover, human perception in emotion recognition compared to the proposed approach is tested with 10 volunteers. The experimental results and comparisons with the average human performance show the effectiveness of the proposed multi-modal approach. (C) 2015 Elsevier Inc. All rights reserved.
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  • Functional supramolecular polymers for biomedical applications.

    Dong, Ruijiao   Zhou, Yongfeng   Huang, Xiaohua   Zhu, Xinyuan   Lu, Yunfeng   Shen, Jian  

    As a novel class of dynamic and non-covalent polymers, supramolecular polymers not only display specific structural and physicochemical properties, but also have the ability to undergo reversible changes of structure, shape, and function in response to diverse external stimuli, making them promising candidates for widespread applications ranging from academic research to industrial fields. By an elegant combination of dynamic/reversible structures with exceptional functions, functional supramolecular polymers are attracting increasing attention in various fields. In particular, functional supramolecular polymers offer several unique advantages, including inherent degradable polymer backbones, smart responsiveness to various biological stimuli, and the ease for the incorporation of multiple biofunctionalities (e.g., targeting and bioactivity), thereby showing great potential for a wide range of applications in the biomedical field. In this Review, the trends and representative achievements in the design and synthesis of supramolecular polymers with specific functions are summarized, as well as their wide-ranging biomedical applications such as drug delivery, gene transfection, protein delivery, bio-imaging and diagnosis, tissue engineering, and biomimetic chemistry. These achievements further inspire persistent efforts in an emerging interdisciplin-ary research area of supramolecular chemistry, polymer science, material science, biomedical engineering, and nanotechnology. =C2=A9 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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  • Effects of bisphenol A on chlorophyll fluorescence in five plants.

    Zhang, Jiazhi   Wang, Lihong   Li, Man   Jiao, Liya   Zhou, Qing   Huang, Xiaohua  

    The aim of this study was to evaluate the effects of bisphenol A (BPA) on plant photosynthesis and determine whether the photosynthetic response to BPA exposure varies in different plants. Chlorophyll fluorescence techniques were used to investigate the effects of BPA on chlorophyll fluorescence parameters in tomato (Lycopersicum esculentum), lettuce (Lactuca sativa), soybean (Glycine max), maize (Zea mays), and rice (Oryza sativa) seedlings. Low-dose (1.5 or 3.0 mg L(-1)) BPA exposure improved photosystem II efficiency, increased the absorption and conversion efficiency of primary light energy, and accelerated photosynthetic electron transport in each plant, all of which increased photosynthesis. These effects weakened or disappeared after the withdrawal of BPA. High-dose (10.0 mg L(-1)) BPA exposure damaged the photosystem II reaction center, inhibited the photochemical reaction, and caused excess energy to be released as heat. These effects were more evident after the highest BPA dose (17.2 mg L(-1)), but they weakened after the withdrawal of BPA. The magnitude of BPA exposure effects on the chlorophyll fluorescence parameters in the five plants followed the order: lettuce > tomato > soybean > maize > rice. The opposite order was observed following the removal of BPA. In conclusion, the chlorophyll fluorescence response in plants exposed to BPA depended on BPA dose and plant species.=20
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  • Effects of bisphenol A on mineral nutrition in soybean seedling roots.

    Nie, Lijun   Wang, Lihong   Wang, Qingqing   Wang, Shengman   Zhou, Qing   Huang, Xiaohua  

    Bisphenol A (BPA) is a ubiquitous chemical in the environment and potentially harmful to plants. However, relevant studies of the effects of BPA on plants are relatively scarce. In the present work, the effects of BPA on the biomass (fresh wt and dry wt), absorptive function (activity and absorptive area), and mineral element levels in soybean (Glycine max L.) seedling roots treated with 1.5mgL(-1) , 3.0mgL(-1) , 6.0mgL(-1) , 12.0mgL(-1) , 24.0mgL(-1) , 48.0mgL(-1) , and 96.0mgL(-1) BPA were investigated. Treatment with 1.5mgL(-1) BPA increased the levels of nitrate and other mineral elements (P, K, Mg, Mn, Zn, and Mo) in the roots, whereas treatments with BPA at higher concentrations decreased the levels of these elements in the roots. All treatments with BPA caused increases in the levels of ammonium, Ca, Fe, and Cu in the roots. Moreover, treatment with 1.5mgL(-1) BPA increased the fresh weight, dry weight, activity, and absorptive area of the roots, whereas treatments with BPA at higher concentrations decreased these indices in a dose-dependent manner. Furthermore, correlation analysis data showed that BPA affected the levels of mineral elements and absorptive function of soybean seedling roots, which may be the physiological basis of BPA action on plants. =C2=A9 2014 SETAC.
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  • Effects of bisphenol A on antioxidant system in soybean seedling roots.

    Wang, Qingqing   Wang, Lihong   Han, Ruobing   Yang, Linying   Zhou, Qing   Huang, Xiaohua  

    Bisphenol A (BPA), an emerging pollutant in the environment, has potential toxic effects on plants. The toxicity mechanism, however, remains largely unknown. The antioxidant system plays an important role in protecting plants against the damage of stress. The present study investigated the effects of BPA on the antioxidant system (superoxide dismutase [SOD], peroxidase [POD], catalase [CAT], ascorbic acid [AsA], proline, reduced glutathione [GSH]), reactive oxygen species (ROS; hydrogen peroxide [H2 O2 ], superoxide anion [O2 (-) ]) accumulation, and membrane lipid peroxidation (malondialdehyde [MDA], cell membrane permeability) in soybean seedling roots. The 1.5mgL(-1) BPA exposure did not affect test indices in the roots. Exposure to 3.0mgL(-1) , 6.0mgL(-1) , 12.0mgL(-1) , or 24.0mgL(-1) BPA caused increases in SOD (except for 3.0mgL(-1) BPA) and CAT activities, as well as in AsA, proline, and GSH (except for 3.0mgL(-1) BPA) content, leading to increases in the H2 O2 and O2 (-) content and to membrane lipid peroxidation. Exposure to 48.0mgL(-1) or 96.0mgL(-1) BPA caused decreases in the CAT activity and AsA/GSH content, as well as increases in the SOD and POD activities and the proline content, leading to excess ROS accumulation (i.e., H2 O2 and O2 (-) ) and cell membrane damage. After withdrawal of BPA exposure, ROS accumulation and membrane lipid peroxidation were alleviated by regulating a special antioxidant enzyme or substance. =C2=A9 2015 SETAC.
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  • Multi-modal emotion analysis from facial expressions and electroencephalogram

    Huang, Xiaohua   Kortelainen, Jukka   Zhao, Guoying   Li, Xiaobai   Moilanen, Antti   Sepp?nen, Tapio   Pietik?inen, Matti  

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  • A 1-GHz 1.6-mW Auto-Calibrated Bit Slicer for Energy/Envelope Detection Receivers

    Huang, Xiaohua   Liu, Dang   Rhee, Woogeun   Wang, Zhihua  

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  • LED LAMP

    Disclosed is an LED lamp, comprising a heat dissipation device (1) and a PCB (2) tightly attached to the heat dissipation device (1), with a thermally conductive grease layer (3) being provided between the heat dissipation device (1) and the PCB (2), the thermally conductive grease layer (3) at least comprising a thermally conductive graphene adhesive. In this way, the thermally conductive grease layer (3) can be used to effectively transfer the heat generated by the PCB (2) to the heat dissipation device (1) so as to dissipate the heat. Moreover, the thermally conductive grease layer (3) at least has the thermally conductive graphene adhesive, wherein the heat dissipation efficiency of the thermally conductive graphene adhesive is relatively high. Using graphene as a thermally conductive carrier, reliability is improved, the amount of heat dissipation material used can be reduced, the whole lamp structure becomes simpler and more integrated, and the service life of the LED lamp is prolonged.
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