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Search Results: 1 - 10 of 109131 matches for " YAN Wei-hong "
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Characteristics and Changes of Cold Surge Events over China during 1960-2007
DING Ting,QIAN Wei-Hong,YAN Zhong-Wei,
,QIAN Wei-Hong,YAN Zhong-Wei

大气和海洋科学快报 , 2009,
Abstract: This paper demonstrates regional characteristics, a long-term decreasing trend, and decadal variations in the frequency of cold surge events based on daily mean temperature and daily minimum temperature data in mainland China from 1960 to 2008. During these 48 years, four high frequency centers of cold surge events were located in Xinjiang, central North China, northeast China, and southeast China. A main frequency peak of cold surge events occurs in autumn for the four regions and another peak is detected in spring over northeast China and Northeast China. The regional pattern of cold surge frequencies is in accordance with the perturbation kinetic energy distribution in October-December, January, and February-April. The long-term decreasing trend (-0.2 times/decade) of cold surge frequencies in northeast China and decadal variations in China are related to the variations of the temperature difference between southern and northern China in the winter monsoon season; these variations are due to the significant rising of winter temperatures in high latitudes.
Pentaaqua(1H-benzimidazole-5,6-dicarboxylato-κN3)copper(II) pentahydrate
Qian Gao,Wei-Hong Gao,Chao-Yan Zhang,Ya-Bo Xie
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808017595
Abstract: The title compound, [Cu(C9H4N2O4)(H2O)5]·5H2O, contains one crystallographically independent CuII atom and one 1H-benzimidazole-5,6-dicarboxylate (bdc) ligand, along with five coordinated and five uncoordinated water molecules. The CuII atom is six-coordinated by one N atom from the bdc ligand and five O atoms from water molecules, giving an octahedral coordination geometry. Hydrogen bonds link the mononuclear complex and uncoordinated water molecules into a three-dimensional network.
Treatment of simple obesity with electro-acupuncture and auricular acupoint pressing: A report of 177 cases
LI Wei-Hong
Zhong Xi Yi Jie He Xue Bao , 2004,
Optical/infrared flares of GRB 080129 from late internal shocks
Wei-Hong Gao
Physics , 2009, DOI: 10.1088/0004-637X/697/2/1044
Abstract: Strong optical and near-infrared (NIR) flares were discovered in the afterglow of GRB 080129. Their temporal behaviors, the sudden emergence and the quick disappearance, are rather similar to that of many X-ray flares (for instance, the giant flare of GRB 050502B). We argue that the optical/NIR flares following GRB 080129 are a low energy analogy of the X-ray flares and the most likely interpretation is the "late internal shock model". In this model, both the very sharp decline and the very small ratio between the duration and the occurrence time of the optical/NIR flares in GRB 080129 can be naturally interpreted. The initial Lorentz factor of the flare outflow is found to be $\sim 30$, consistent with the constraint $\leq 120$ set by the forward shock afterglow modeling. Other possibilities, like the reverse shock emission or the radiation from the continued but weaker and weaker collision between the initial GRB outflow material, are disfavored.
The physical origin of optical flares following GRB 110205A and the nature of the outflow
Wei-Hong Gao
Physics , 2011, DOI: 10.1088/1674-4527/11/11/007
Abstract: The optical emission of GRB 110205A is distinguished by two flares. In this work we examine two possible scenarios for the optical afterglow emission. In the first scenario, the first optical flare is the reverse shock emission of the main outflow and the second one is powered by the prolonged activity of central engine. We however find out that it is rather hard to interpret the late ($t>0.1$ day) afterglow data reasonably unless the GRB efficiency is very high ($\sim 0.95$). In the second scenario, the first optical flare is the low energy prompt emission and the second one is the reverse shock of the initial outflow. Within this scenario we can interpret the late afterglow emission self-consistently. The reverse shock region may be weakly magnetized and the decline of the second optical flare may be dominated by the high latitude emission, for which strong polarization evolution accompanying the quick decline is possible, as suggested by Fan et al. in 2008. Time-resolved polarimetry by RINGO2-like polarimeters will test our prediction directly.
SWIFT J164449.3+573451: a plunging event with the Poynting-flux dominated outflow
Wei-Hong Gao
Physics , 2012, DOI: 10.1088/0004-637X/761/2/113
Abstract: Swift J164449+573451 is a peculiar outburst which is most likely powered by the tidal disruption of a star by a massive black hole. Within the tidal disruption scenario, we show that the periastron distance is considerably smaller than the disruption radius and the outflow should be launched mainly via magnetic activities (e.g., Blandford-Znajek process) otherwise the observed long-lasting X-ray afterglow emission satisfying the relation $L_{X}\propto\dot{M}$ can not be reproduced, where $L_{X}$ is the X-ray luminosity and $\dot{M}$ is the accretion rate. We also suggest that $L_{X}\propto\dot{M}$ may hold in the quick decline phase of Gamma-ray Bursts.
Biological formation of 5-aminolevulinic acid by photosynthetic bacteria
LIU Xiu-yan,XU Xiang-yang,MA Qing-lan,WU Wei-hong,
LIU Xiu-yan
,XU Xiang-yang,MA Qing-lan,WU Wei-hong

环境科学学报(英文版) , 2005,
Abstract: In this study, 7 stains of Rhodopseudomonas sp. were selected from 36 photosynthetic bacteria stains storied in our laboratory. Rhodopseudomonas sp. strain 99 28 has the highest 5 aminolevulinic acid(ALA) production ability in these 7 strains. Rhodopseudomonas sp. 99 28 strain was mutated using ultraviolet radiation and a mutant strain L 1, which ALA production is higher than wild strain 99 28 about one times, was obtained. The elements affecting ALA formation of strain 99 28 and L 1 were studied. Under the optimal condition(pH 7 5, supplement of ALA dehydratase(ALAD) inhibitor, levulinic acid(LA) and precursors of ALA synthesis, glycine and succinat, 3000 lx of light density), ALA formation of mutant L 1 was up to 22 15 mg/L. Strain L 1 was used to treat wastewater to remove COD Cr and produce ALA. ALA production was 2 819 mg/L, 1 531 mg/L, 2 166 mg/L, and 2 424 mg/L in monosodium glutamate wastewater(MGW), succotash wastewater(SW), brewage wastewater(BW), and citric acid wastewater(CAW) respectively. More than 90% of COD Cr was removed in four kinds of wastewater. When LA, glycin and succinate were supplied, ALA production was dramatically increased, however, COD Cr could hardly be removed.
GEP Classification Based on Clonal Selection and Quantum Evolution

WANG Wei-hong,DU Yan-ye,LI Qu,

计算机科学 , 2011,
Abstract: Gene Expression Programming based Classification algorithm has shown good classification accuracy,however, it often falls into the local optimums and needs long time searching. In order to further improve the classification power of GEP, clonal selection and quantum evolution were introduced into GEP. A novel approach called C1onalQuantum-GEP was proposed. After affecting the search direction and evolution ability of the antibody population through the updating and exploring of the quantum population, and keeping the best results in the memory pool, this approach gets more pop- ulation diversity, better ability of global optimums searching, and much faster velocity of convergence. Experiments on several benchmark data sets demonstrate the effectiveness and efficiency of this approach. Compared with basic GEP, C1onalQuantum-GEP can achieve better classification results with much smaller scale of the population and much less evolutionary generation.
Response of Leaf and Stem Water Potential of Populus Euphratica to Osmotic Stress in Lower Reaches of Tarim River

ZHUANG Li,CHEN Ya-ning,LI Wei-hong,ZHAO Hong-yan,
庄 丽

中国沙漠 , 2006,
Abstract: The measurement results of water potential of Populus Euphratica in lower reaches of Tarim River in 2003 and 2004 showed that stem water potential in most plots was lower than leaf water potential and there was a great difference between them,which indicated that Populus Euphratica near lower reaches of Tarim River was still under the condition of more serious water stress.The antigradient phenomenon presented by stem and leaf water potential of Populus Euphratica in this area which was different from the daily variation of other plants explained that the temperature was not a predominant factor in a variety of factors influencing the water potential of Populus Euphratica in lower reaches of Tarim River.The relattion analysis between stem/leaf water potential and groundwater level/soil salt,making use of the SAS6.12 software,illuminated that both regression equations and partial regression coefficients in two years fell short of significance level,which revealed that the stem and leaf water potential of Populus Euphratica in lower reaches of Tarim River responded to groundwater level and soil salt less seriously.It could be inferred that soil water content had a greater effect upon the water potential of Populus Euphratica than that of groundwater level,which provided theoretical basis for the suggestion put forward by some experts currently: to turn \!alignment\" water inputting method to \!combining water inputting and water supplying\" method gradually.
An 80-W Laser Diode Array with 0.1 nm Linewidth for Rubidium Vapor Laser Pumping

YANG Zi-Ning,WANG Hong-Yan,LU Qi-Sheng,HUA Wei-Hong,XU Xiao-Jun,

中国物理快报 , 2011,
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