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Search Results: 1 - 10 of 37217 matches for " XiaoYing Zhao "
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Passive optical switching of photon pairs using a spontaneous parametric fiber loop
Ningbo Zhao,Lei Yang,Xiaoying Li
Physics , 2012, DOI: 10.1364/OL.37.001220
Abstract: We study a novel scheme named spontaneous parametric fiber loop (SPFL), configured by deliberately intro- ducing dispersive elements into the nonlinear Sagnac loop, and show it can function as a passive switch of photon pairs. The two-photon state coming out of SPFL highly depends on the dispersion induced phase difference of photon pairs counter-propagating in the loop. By properly managing the dispersive elements, the signal and idler photons of a pair with a certain detuning and bandwidth can be directed to the desired spatial modes of SPFL. If the photon pairs are used to generate heralded single photons, the SPFL can be viewed as a switch of single photons. Moreover, our investigation about the dispersion based phase modulation is also beneficial for designing all fiber sources of entangled photon pairs.
Spectral properties of photon pairs generated by spontaneous four wave mixing in inhomogeneous photonic crystal fibers
Liang Cui,Xiaoying Li,Ningbo Zhao
Physics , 2012, DOI: 10.1103/PhysRevA.85.023825
Abstract: The photonic crystal fiber (PCF) is one of the excellent media for generating photon pairs via spontaneous four wave mixing. Here we study how the inhomogeneity of PCFs affect the spectral properties of photon pairs from both the theoretical and experimental aspects. The theoretical model shows that the photon pairs born in different place of the inhomogeneous PCF are coherently superposed, and a modulation in the broadened spectrum of phase matching function will appear, which prevents the realization of spectral factorable photon pairs. In particular, the inhomogeneity induced modulation can be examined by measuring the spectrum of individual signal or idler field when the asymmetric group velocity matching is approximately fulfilled. Our experiments are performed by tailoring the spectrum of pulsed pump to satisfy the specified phase matching condition. The observed spectra of individual signal photons, which are produced from different segments of the 1.9 m inhomogeneous PCF, agree with the theoretical predictions. The investigations are not only useful for fiber based quantum state engineering, but also provide a dependable method to test the homogeneity of PCF.
A Study on Emotional Metaphors in Yellow Emperor  [PDF]
Xiaoying Li
Open Journal of Modern Linguistics (OJML) , 2015, DOI: 10.4236/ojml.2015.55042
Abstract: The theoretical system of the medical classic Yellow Emperor reflects the cultural levels of the Warring States Period, and social history, and science and technology development long after the Qin and Han dynasty, and it also reflects the Chinese traditional mode of thinking. From the perspective of cognitive linguistics, study on the book Yellow Emperor’s emotional metaphor paradigm, cognitive mechanisms and meaning construction, it is found that emotional metaphor is a more general theory which explains the important thinking of physiology, pathology, therapy and health, etc., but it is also found that as long as it is related to disease and health, there will appear magical implication of emotional metaphors.
Isolation and cloning of a new gene encoding maize initiation factor
Hu Jianguang,Zhao Xiangshan,Yuan Ziqiang,Qian Xiaoying,Yang Jinshui
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02884536
Abstract: It was demonstrated that parental gene expression of maize in hybrid genetic background was different from that in their inbred lines. RT-PCR revealed a cDNA overexpressed in hybrid maize. The cDNA was reamplified and used to screen a corresponding cDNA library. A full length of a cDNA insert ZH01 was isolated and shown to have an open reading frame encoding 414a. a. Sequence comparison shows that ZH01 has extremely high similarity with the previously reported plant initiator factor elF-4A and distinct difference from another maize elF-4A gene MIF4A. Ovcrexpression of ZH01 in hybrid may involve vigorous growth of hybrid maize seedlings.
Dryness-wetness change and regional differentiation of flood-drought disasters in Guangdong during 1480-1940AD

ZHONG Wei,XUE Jibin,PENG Xiaoying,ZHAO Yinjuan,

地理学报 , 2005,
Abstract: Based on the historical records of the drought and flood disasters during 1480-1940AD, this paper reconstructs the sequences of wetness index (WI) and drought and flood disasters. We find a good identical relationship between the fluctuation of WI sequence and the δ18O record of the GISP2 ice core in Greenland, which shows an apparent monsoonal disposal pattern of moisture and temperature. By applying the Morlet Wavelet Transform Method to deal with the data, several apparent periodicities, such as 7-8a, 11-15a, 20-23a and ca 50a, are revealed, among which some can be attributed to the solar forcing. Based on results of Cluster Analysis of dry-wet changes, we resume the regional differentiation pattern of flood-drought disasters all over Guangdong during different climatic intervals in the LIA and, find the western and northern parts of Guangdong have undergone drastic changes in drought-flood regional differentiation, but the eastern part is relatively stable, and the area of the Pearl River Delta shows stable condition of more flood disasters.
Downregulated E-Cadherin Expression Indicates Worse Prognosis in Asian Patients with Colorectal Cancer: Evidence from Meta-Analysis
Xin He, Zhigang Chen, Minyue Jia, Xiaoying Zhao
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0070858
Abstract: Background Epithelial-mesenchymal transition (EMT) plays a crucial role in the progression and aggressiveness of colorectal carcinoma. E-cadherin is the best-characterized molecular marker of EMT, but its prognostic significance for patients with CRC remains inconclusive. Methodology Eligible studies were searched from the PubMed, Embase and Web of Science databases. Correlation between E-cadherin expression and clinicopathological features and prognosis was analyzed. Subgroup analysis was also performed according to study location, number of patients, quality score of studies and cut-off value. Principal Findings A total of 27 studies comprising 4244 cases met the inclusion criteria. Meta-analysis suggested that downregulated E-cadherin expression had an unfavorable impact on overall survival (OS) of CRC (n = 2730 in 14 studies; HR = 2.27, 95%CI: 1.63–3.17; Z = 4.83; P = 0.000). Subgroup analysis indicated that low E-cadherin expression was significantly associated with worse OS in Asian patients (n = 1054 in 9 studies; HR = 2.86, 95%CI: 2.13–3.7, Z = 7.11; P = 0.000) but not in European patients (n = 1552 in 4 studies; HR = 1.14, 95%CI: 0.95–1.35, Z = 1.39; P = 0.165). In addition, reduced E-cadherin expression indicated an unfavorable OS only when the cut off value of low E-cadherin expression was >50% (n = 512 in 4 studies; HR = 2.08, 95%CI 1.45–2.94, Z = 4.05; P = 0.000). Downregulated E-cadherin expression was greatly related with differentiation grade, Dukes' stages, lymphnode status and metastasis. The pooled OR was 0.36(95%CI: 0.19–0.7, Z = 3.03, P = 0.002), 0.34(95%CI: 0.21–0.55, Z = 6.61, P = 0.000), 0.49(95%CI: 0.32–0.74, Z = 3.02, P = 0.002) and 0.45(95%CI: 0.22–0.91, Z = 3.43, P = 0.001), respectively. Conclusions This study showed that low or absent E-cadherin expression detected by immunohistochemistry served as a valuable prognostic factor of CRC. However, downregulated E-cadherin expression seemed to be associated with worse prognosis in Asian CRC patients but not in European CRC patients. Additionally, this meta-analysis suggested that the negative threshold of E-cadherin should be >50% when we detected its expression in the immunohistochemistry stain.
How Framing Effect Impact on Decision Making on Internet Shopping  [PDF]
Xiaoying Li, Wenquan Ling
Open Journal of Business and Management (OJBM) , 2015, DOI: 10.4236/ojbm.2015.31010
Abstract: Framing effect is an understanding and assessment that individual implements different behaviors when facing to the multiple choice that expressing the same meaning. Previously, scholars went through numerous empirical studies regarding impact of the method as well as environment in making decision of online purchasing [1]-[4]. Also, scholars have proved that there are complex influences of psychological factors when consumers make decisions of shopping. Therefore, the article aims to analyze the impact of faming effect in e-commerce when consumers make decisions so as to summarize the shortage in academic and practical aspects.
On Rousseau’s Love Outlook and His Civilian Complex  [PDF]
Xiaoying Li, Yingfei Yuan
Advances in Literary Study (ALS) , 2015, DOI: 10.4236/als.2015.34018
Abstract: Rousseau had some peculiar love experiences which many people couldn’t understand, especially the experience with the servant Therese le Vasseur. So in the article, I explored his life background, his love experiences and analyzed his love outlook. Certainly, his love outlook was related to his love experiences and his love experiences also were related to his civilian complex. I might say that his love experiences, love outlook and civilian complex answered people’s doubt that was why he chose Therese le Vasseur to spend his rest of his life.
Soil Heavy Metal Pollution Evaluation around Mine Area with Traditional and Ecological Assessment Methods  [PDF]
Han Zhou, Xiaoying Guo
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.310005
Abstract:

As a widespread problem, heavy metals contamination in soil has drawn considerable study interest, especially for the farmlands around mine area. A variety of pollution evaluation methods have been compared including both traditional physical and chemical analysis methods as well as ecological assessment methods. And the combination of multiple assessment methods was recommended to get a comprehensive and through soil heavy metal pollution evaluation.

Decrease of Plasma Platelet-Activating Factor Acetylhydrolase Activity in Lipopolysaccharide Induced Mongolian Gerbil Sepsis Model
Junwei Yang,Jing Xu,Xiaoying Chen,Yixuan Zhang,Xucheng Jiang,Xiaokui Guo,Guoping Zhao
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0009190
Abstract: Platelet-activating factor (PAF) plays an important role in the pathogenesis of sepsis, and the level of plasma PAF acetylhydrolase (pPAF-AH), which inactivates PAF, decreases in sepsis patients except for the sepsis caused by severe leptospirosis. Usually, increase of pPAF-AH activity was observed in lipopolysaccharide (LPS)-induced Syrian hamster and rat sepsis models, while contradictory effects were reported for mouse model in different studies. Here, we demonstrated the in vivo effects of LPS upon the change of pPAF-AH activity in C57BL/6 mice and Mongolian gerbils. After LPS-treatment, the clinical manifestations of Mongolian gerbil model were apparently similar to that of C57BL/6 mouse sepsis model. The pPAF-AH activity increased in C57BL/6 mice after LPS induction, but decreased in Mongolian gerbils, which was similar to that of the human sepsis. It thus suggests that among the LPS-induced rodent sepsis models, only Mongolian gerbil could be used for the study of pPAF-AH related to the pathogenesis of human sepsis. Proper application of this model might enable people to clarify the underline mechanism accounted for the contradictory results between the phase II and phase III clinical trials for the administration of recombinant human pPAF-AH in the sepsis therapy.
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