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Search Results: 1 - 10 of 55162 matches for " XIA Xiao-Fei "
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Huai-Xia Yang,Xia Wang,Cai-Xia Xie,Xiao-Fei Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811029321
Abstract: In the title complex, [CdI2(C16H12N2O2)2], the CdII atom is located on a twofold rotation axis and is four-coordinated by two N atoms from symmetry-related 2-(2-furyl)-1-(2-furylmethyl)-1H-benzimidazole ligands and two I atoms in a distorted tetrahedral configuration. The benzimidazole rings in adjacent molecules are parallel, with an average interplanar distance of 3.486 . The I atom is disordered over two sites in a 0.85 (5):0.15 (5) ratio.
Suppression of Chaos in a Bose-Einstein Condensate Loaded into a Moving Optical Superlattice Potential

LUO Xiao-Bing,XIA Xiu-Wen,ZHANG Xiao-Fei,

中国物理快报 , 2010,
Abstract: We have shown that the application of modulating the secondary lattice is an efficient route to suppressing the generation of chaotic traveling waves of a Bose-Einstein Condensate with attractive interatomic interaction loaded into a moving optical superlattice consisting of two lattices. With the Melnikov method, we obtain the optimal value of the relative phase between the two lattice harmonics for the control of chaos. We also find that the regularization route as the potential depth of the secondary lattice is varied and fairly rich, including the period-doubling bifurcations.
Nuclear Effects on Charmonium Production
Xiao-Fei Zhang,Cong-Feng Qiao,Xiao-Xia Yao,Wei-Qin Chao
Physics , 1997,
Abstract: $J/\psi$ and $\psi'$ production cross sections in fixed-target experiment is calculated, considering the contributions from both color-singlet and color-octet mechanisms.The results are applied to the investigations of the $J/\psi$ suppression and the $\psi'/\psi$ ratio problems in p-A collisions. The results agree with the experimental data as the $(c \bar c)-$nucleon absorption cross sections $\sigma_{abs}^8\simeq 10mb $ for $(c \bar c)_8$ and $\sigma_{abs}^1\simeq 0mb $ for $(c \bar c)_1$. The model is further used to investigate A-A collisions when comover absorption mechanism is also considered. It is found that the observed experiment data of $J/\psi$ and $\psi'/\psi$ ratio in S-U collisions and Pb-Pb collisions can not be explained consistently within this model. The possibility of QGP formation in S-U and Pb-Pb collisions is also discussed.
Transcriptomic Analysis of a Tertiary Relict Plant, Extreme Xerophyte Reaumuria soongorica to Identify Genes Related to Drought Adaptation
Yong Shi, Xia Yan, Pengshan Zhao, Hengxia Yin, Xin Zhao, Honglang Xiao, Xinrong Li, Guoxiong Chen, Xiao-Fei Ma
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063993
Abstract: Background Reaumuria soongorica is an extreme xerophyte shrub widely distributed in the desert regions including sand dune, Gobi and marginal loess of central Asia which plays a crucial role to sustain and restore fragile desert ecosystems. However, due to the lacking of the genomic sequences, studies on R. soongorica had mainly limited in physiological responses to drought stress. Here, a deep transcriptomic sequencing of R. soongorica will facilitate molecular functional studies and pave the path to understand drought adaptation for a desert plant. Methodology/Principal Findings A total of 53,193,660 clean paired-end reads was generated from the Illumina HiSeq? 2000 platform. By assembly with Trinity, we got 173,700 contigs and 77,647 unigenes with mean length of 677 bp and N50 of 1109 bp. Over 55% (43,054) unigenes were successfully annotated based on sequence similarity against public databases as well as Rfam and Pfam database. Local BLAST and Kyoto Encyclopedia of Genes and Genomes (KEGG) maps were used to further exhausting seek for candidate genes related to drought adaptation and a set of 123 putative candidate genes were identified. Moreover, all the C4 photosynthesis genes existed and were active in R. soongorica, which has been regarded as a typical C3 plant. Conclusion/Significance The assembled unigenes in present work provide abundant genomic information for the functional assignments in an extreme xerophyte R. soongorica, and will help us exploit the genetic basis of how desert plants adapt to drought environment in the near future.
Magnetic separation of pentlandite from serpentine by selective magnetic coating
Ji-wei Lu,Zhi-tao Yuan,Xiao-fei Guo,Zhong-yun Tong,Li-xia Li
- , 2019, DOI: https://doi.org/10.1007/s12613-019-1704-1
Abstract: In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate (SHMP) and sodium oleate (SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained under the optimized operating conditions. Considering the above, the adsorption behaviors of SHMP and SO and the surface properties of minerals after the magnetic coating were studied by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results show that magnetite was preferentially coated on the pentlandite surfaces and sparingly coated on the serpentine surfaces in the presence of SHMP and SO. Furthermore, calculations by Derjaguin-Landau-Verwey-Overbeek (DLVO) theory indicate that the preferential adsorption of magnetite on the pentlandite surfaces is due to the presence of a hydrophobic interaction between the magnetite and pentlandite, which is much stronger than the interaction between magnetite and serpentine.
Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

Zhang Chu-Hang,L&#,Neng,Zhang Xiao-Fei,Saida Ajee,Xia A-Gen,Ye Gao-Xiang,

中国物理 B , 2011,
Abstract: The morphology evolution of silver islands on silicone oil surfaces is measured and the microstructure of the islands is studied. The deposited Ag atoms diffuse and aggregate on the oil surface and then Ag islands with the width of the order of 102-nm form. After the samples are removed from the vacuum chamber, the immediate measurement shows that the apparent Ag coverage of the total area decays with the magnitude up to (23.0±3.8)% in few minutes. In the following two hours, the samples are kept in the ambient atmosphere and several unexpected results are detected: 1) as the topological structure of the islands evolves, the total area of each island decreases gradually and the maximum decrement measured is around 20%; 2) if an island breaks and becomes two small pieces, the total area decreases obviously; 3) however, if two small islands meet and stick together, a sudden increment of the total area is observed. These phenomena, mirroring the evolution process of the island microstructure, are resulted from both the diffusion of the atoms and the combination of the defects inside the islands.
Motion of Electron in a Laser Field around a Plasma Interface Under Compton Scattering

HAO Dong-shan,HAO Xiao-fei,HUANG Yan-xia,

光子学报 , 2009,
Abstract: The motion of the electron in the coupling laser pulsefield around a plasma interface under Compton scattering was studied.The equations which present the general relationship between the longitudinal and the transverse moment of the particle were derived.Results show that the in-homogeneity leads to great changes in the characters of the motion of the electron.This in-homogeneity is helpful to the acceleration of the injected electron under some conditions.And,the catapulting thresholds can be effectively ...
An improved attack algorithm for discrete logarithm problem

ZHANG Hai-bo,WANG Xiao-fei,XIA Xue-zhi,HUANG You-peng,

计算机应用 , 2007,
Abstract: Baby-step-giant-step attack algorithm is universally suitable to solve all discrete logarithm problems,but its relatively larger storage cost is an obvious defect.An improved attack algorithm which can cut down half of space spending and cancel the inversing-computation on multiplicative group was presented.By using hash function,this new algorithm abolishes list-sorting process and drops the time complexity of list-searching into O(1).The performance analysis shows that the new algorithm obviously reduces the time and space use.Furthermore,how to play down the input size to shorten computation journey of attack algorithms was discussed and an easy way to parity sieve for discrete logarithm was given.
Some properities of some subclasses of univalent functions
Xiao-Fei Li,An-Ping Wang
Applied Mathematical Sciences , 2012,
Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives
Xiao-fei Zhang,Taotao Qiu
Physics , 2006, DOI: 10.1016/j.physletb.2006.09.038
Abstract: In the framework of a single scalar field quintom model with higher derivative, we construct in this paper a dark energy model of which the equation of state (EOS) $w$ crosses over the cosmological constant boundary. Interestingly during the evolution of the universe $w<-1$ happens just for a period of time with a distinguished feature that $w$ starts with a value above -1, transits into $w<-1$, then comes back to $w>-1$. This avoids the Big Rip jeopardy induced by $w<-1$.
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