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Search Results: 1 - 5 of 5 matches for " LINXin "
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Tracking control for multi-agent consensus with an active leader and variable topology
Jiangping Hu,Yiguang Hong,Linxin Gao
Physics , 2007, DOI: 10.1016/j.automatica.2006.02.013
Abstract: In this paper, we consider the coordination control of a group of autonomous mobile agents with multiple leaders. Different interconnection topologies are investigated. At first, a necessary and sufficient condition is proved in the case of fixed interconnection topology. Then a sufficient condition is proposed when the interconnection topology is switched. With a simple first-order dynamics model by using the neighborhood rule, both results show that the group behavior of the agents will converge to the polytope formed by the leaders.
Method of Mechanical Fault Intelligent Diagnosis Based on Vibration Signal of High Voltage Circuit Breaker
YANGZhuangzhuang,LIUYang,ZHOUGuoming,LINXin,JITian,LIBin
高压电器 , 2014,
Abstract: Basedonvibrationsignalofhighvoltagecircuitbreaker,anewmethodofintelligentfaultdiagnosisthatwaveletpacketextractsenergyentropywhichareusedascharacteristicvectorofthesupportvectormachine(SVM)toconstructclassifierforfaultdiagnosisispresented.Theaccelerationsensorsareappliedtocollectingthevibrationdataofdifferentstatesofhighvoltagecircuitbreakersbasedonself-madeexperimentalplatforminthismethod.Thewaveletpacketarefullyappliedtoanalyzethevibrationsignalanddecomposevibrationsignalintothreelayers,andwaveletpacketenergyentropyofeachfrequencybandareasthecharacteristicvectorofcircuitbreakerfailuremode.Thentheintelligentdiagnosisnetworkisestablishedonthebasisofthesupportvectormachinetheory.Itisverifiedthatthemethodhasabettercapabilityofclassificationandahigheraccuracycomparedwiththetraditionalneuralnetworkdiagnosismethodthroughdistinguishingthethreefaultmodeswhicharetrippingdevicestuck,thevacuumarcingchamberfixedboltloosenessandtoomuchfrictionforceofthetransmissionmechanismofcircuitbreakerinthispaper.
CHLORINE DIOXIDE TREATMENT OF SISAL FIBRE: SURFACE LIGNIN AND ITS INFLUENCES ON FIBRE SURFACE CHARACTERISTICS AND INTERFACIAL BEHAVIOUR OF SISAL FIBRE/PHENOLIC RESIN COMPOSITES
Linxin Zhong,Shiyu Fu,Feng Li,Huaiyu Zhan
BioResources , 2010,
Abstract: This paper describes an investigation of the influences of chlorine dioxide treatment on fibre surface lignin. The fibre surface characteristics and the interfacial behaviour of the sisal fibre/phenolic resin composites were also studied by SEM, AFM, and XPS. The results show that the surface of the untreated fibre contains a large amount of lignin with granular structure and non-granular structure. The surface lignin concentration is up to 51% for the untreated fibre, and then it decreases to 24% and 20% for fibres treated with 1.5 % and 2.0% chlorine dioxide, respectively. The removal of lignin from the fibre surface can enhance the interfacial strength of the composites, giving rise to increases by 36% and 28% in tensile strength and internal bonding strength. These results indicate that the surface properties of single sisal fibres can be tailored to improve the fibre/resin interface. Chlorine dioxide treatment has potential for surface modification of sisal fibre in engineering the interfacial behaviour of composites.
Berberine Improves Insulin Sensitivity by Inhibiting Fat Store and Adjusting Adipokines Profile in Human Preadipocytes and Metabolic Syndrome Patients
Jing Yang,Jinhua Yin,Hongfei Gao,Linxin Xu,Yan Wang,Lu Xu,Ming Li
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/363845
Abstract: Berberine is known to inhibit the differentiation of 3T3-L1 cells in vitro, improve glycemic control, and attenuate dyslipidemia in clinical study. The aim of this study was to investigate the effects of berberine on preadipocytes isolated from human omental fat and in metabolic syndrome patients treated with berberine for 3 months. We have shown that treatment with 10 μM berberine resulted in a major inhibition of human preadipocyte differentiation and leptin and adiponectin secretion accompanied by downregulation of PPARγ2, C/EBPα, adiponectin, and leptin mRNA expression. After 3 months of treatment, metabolic syndrome patients showed decrease in their BMI (31.5±3.6 versus 27.4±2.4 kg/m2) and leptin levels (8.01 versus 5.12 μg/L), as well as leptin/adiponectin ratio and HOMA-IR. These results suggest that berberine improves insulin sensitivity by inhibiting fat store and adjusting adipokine profile in human preadipocytes and metabolic syndrome patients.
Photosynthetic physiological characteristics in response to elevated CO_2 concentration of three Larch (Larix) species seedlings
3种落叶松幼苗对CO_2升高的光合生理响应

MAO Zijun,ZHAO Xizhu,LIU Linxin,JIANG HaifengKey Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin,China,
毛子军
,赵溪竹,刘林馨,姜海凤

生态学报 , 2010,
Abstract: 采用Li-6400便携式光合作用测定系统研究CO2升高对长白落叶松(Larix olgensis Herry.),日本落叶松(Larix kaempferi Carr.) 和兴安落叶松(Larix gmelini Rupr.)当年生和1年生幼苗的光合特性的影响。结果表明:CO2升高使3种落叶松光饱和光合速率(Pmax)和呼吸速率均有不同程度的增加,其中,长白落叶松当年生和1年生幼苗Pmax分别比对照提高了91%和83%,日本落叶松当年生和1年生幼苗Pmax分别比对照提高了71%和94%,而兴安落叶松当年生和1年生幼苗Pmax分别比对照提高了32%和106%。除兴安落叶松外,CO2升高使所有落叶松当年生幼苗的光补偿点(LCP)下降,说明当年生幼苗对CO2浓度升高的反应更敏感。CO2升高使日本落叶松当年生和1年生幼苗光饱和点(LSP)都升高,反映了其光合作用提高的潜力较大。CO2升高条件下,除1年生兴安落叶松外,其他处理的落叶松最大量子效率(AQYmax)均增加。比较分析表明,在未来大气CO2浓度升高条件下,日本落叶松的生长潜能可能最大,具有较强的生态优势,长白落叶松次之,兴安落叶松最小。
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