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Search Results: 1 - 10 of 36890 matches for " Xinye Zhao "
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Two Methods for Calculating the Size Distribution of Ferritin’s Outer Diameter  [PDF]
Xinye Zhao, Junhui Gao
Computational Molecular Bioscience (CMB) , 2018, DOI: 10.4236/cmb.2018.83006
Abstract: Ferritin is a kind of iron-storage protein widely found in animals and plants. The dynamic light scattering (Dynamic Light Scattering) method is used in the laboratory to determine the ferritin size. This paper presents two methods for calculating the outer diameter size distribution of ferritin, both of which assume that ferritin is approximately spherical. The ferritin data file was obtained from the PDB website and was calculated using the coordinate data of the amino acids to which the amino acids belong. The first method is based on the calculation of the sphere center; the second method is based on the method of the farthest distance atom pair. The outer diameter size distribution curves obtained by the two methods are basically consistent with the experimental methods. The paper also compares the calculation results and performance of the two methods. Both methods are versatile and can be used to calculate the size distribution of the globular proteins.
Numerical Study on the Relationship between the Number of Ferritin Subunits and the Size of Outer Diameter  [PDF]
Xinye Zhao, Junhui Gao
Advances in Bioscience and Biotechnology (ABB) , 2018, DOI: 10.4236/abb.2018.910035
Abstract: Ferritin is assembled from sub-chains into a spherical shape. We have found that the number of sub-chains is generally 3, 6, 8, 12, 24, 36, and the corresponding spherical volume (outer diameter) is also different. In this paper, using the protein structural data from PDB website, linear regression was carried out to model the relationship between sub-chain number and outer diameter of 25 ferritins by calculation and analysis, but the results were not ideal. In order to improve the model, we divided the 25 proteins into two groups by molecular evolution, followed by the establishment of a linear model. The correlation coefficient of one group was R2 = 0.98. Based on calculations and modelling, we hypothesize that the new ferritin formed by the 3kx9 site-directed mutagenesis is no longer 24-chain, but a 36-chain mutant.
Does "Like" Really Mean Like? A Study of the Facebook Fake Like Phenomenon and an Efficient Countermeasure
Xinye Lin,Mingyuan Xia,Xue Liu
Computer Science , 2015,
Abstract: Social networks help to bond people who share similar interests all over the world. As a complement, the Facebook "Like" button is an efficient tool that bonds people with the online information. People click on the "Like" button to express their fondness of a particular piece of information and in turn tend to visit webpages with high "Like" count. The important fact of the Like count is that it reflects the number of actual users who "liked" this information. However, according to our study, one can easily exploit the defects of the "Like" button to counterfeit a high "Like" count. We provide a proof-of-concept implementation of these exploits, and manage to generate 100 fake Likes in 5 minutes with a single account. We also reveal existing counterfeiting techniques used by some online sellers to achieve unfair advantage for promoting their products. To address this fake Like problem, we study the varying patterns of Like count and propose an innovative fake Like detection method based on clustering. To evaluate the effectiveness of our algorithm, we collect the Like count history of more than 9,000 websites. Our experiments successfully uncover 16 suspicious fake Like buyers that show abnormal Like count increase patterns.
Thermally Induced Misalignment in Laser Packaging of Optical Modules
光子器件激光封装中热致角度偏移的降低

Lou Xinye,Wu Xingkun,
楼歆晔
,吴兴坤

光子学报 , 2006,
Abstract: The thermally-induced misalignment of fiber collimators in laser packaging of optical module under accelerated temperature cycle testing has been studied both experimentally and numerically. Two types of laser welding clips for fiber/fiber collimator,the saddle-shaped and the arch-shaped were employed in the testing. Experimental results showed that the fiber angular misalignment when using saddle-shaped clip is up to 0.023°after undergoing 10 temperature cycles,whereas the misalignment of arch-shaped is 0.01°,about tw two times less than that of the saddle-shaped. A nonlinear thermal-elasticity coupled finiteelement analysis (FEA)has also been utilized to analyze the properties of residual stresses and consequent angular misalignment of collimators. Experimental measurements of the collimator angular misalignment were in a good agreement with the FEA calculated results. The saturated thermally induced angular shift was calculated to be 0.043° for arch-shaped clip in comparison with 0.065° for saddle-shaped clip,and Von Mises stresses were also presented for the both kinds of clips. It was concluded that arch-shaped clip exhibits a 50% higher thermal stability in optical module packaging.
A New Method of Hierarchical Text Clustering Based on Lsa-Hgsom
Jianfeng Wang,Lina Ma,Xinye Li,Yangxiu Zhou
Modern Applied Science , 2009, DOI: 10.5539/mas.v3n9p72
Abstract: Text clustering has been recognized as an important component in data mining. Self-Organizing Map (SOM) based models have been found to have certain advantages for clustering sizeable text data. However, current existing approaches lack in providing an adaptive hierarchical structure within in a single model. This paper presents a new method of hierarchical text clustering based on combination of latent semantic analysis (LSA) and hierarchical GSOM, which is called LSA-HGSOM method. The text clustering result using traditional methods can not show hierarchical structure. However, the hierarchical structure is very important in text clustering. The LSA-HGSOM method can automatically achieve hierarchical text clustering, and establishes vector space model (VSM) of term weight by using the theory of LSA, then semantic relation is included in the vector space model. Both theory analysis and experimental results confirm that LSA-HGSOM method decreases the number of vector, and enhances the efficiency and precision of text clustering.
Hemoglobin A1c for Diagnosis of Postpartum Abnormal Glucose Tolerance among Women with Gestational Diabetes Mellitus: Diagnostic Meta-Analysis
Xudong Su, Zhaoyan Zhang, Xinye Qu, Yaqiang Tian, Guangzhen Zhang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0102144
Abstract: Objective To evaluate the accuracy of glycosylated hemoglobin A1c (HbA1c) for the diagnosis of postpartum abnormal glucose tolerance among women with gestational diabetes mellitus (GDM). Methods After a systematic review of related studies, the sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and other measures about the accuracy of HbA1c in the diagnosis of postpartum abnormal glucose tolerance were pooled using random-effects models. The summary receiver operating characteristic (SROC) curve was used to summarize the overall test performance. Results Six studies met our inclusion criteria. The pooled results on SEN, SPE, PLR, NLR, and DOR were 0.36 (95% CI 0.23–0.52), 0.85 (95% CI 0.73–0.92), 2.4 (95% CI 1.6–3.6), 0.75 (95% CI 0.63–0.88) and 3 (95% CI 2–5). The area under the summary receiver operating characteristic (SROC) curve was 0.67 with a Q value of 0.63. Conclusions Measurement of HbA1c alone is not a sensitive test to detect abnormal glucose tolerance in women with prior GDM.
A Quantum Scattering Interferometer
Russell A. Hart,Xinye Xu,Ronald Legere,Kurt Gibble
Physics , 2007, DOI: 10.1038/nature05680
Abstract: The collision of two ultra-cold atoms results in a quantum-mechanical superposition of two outcomes: each atom continues without scattering and each atom scatters as a spherically outgoing wave with an s-wave phase shift. The magnitude of the s-wave phase shift depends very sensitively on the interaction between the atoms. Quantum scattering and the underlying phase shifts are vitally important in many areas of contemporary atomic physics, including Bose-Einstein condensates, degenerate Fermi gases, frequency shifts in atomic clocks, and magnetically-tuned Feshbach resonances. Precise measurements of quantum scattering phase shifts have not been possible until now because, in scattering experiments, the number of scattered atoms depends on the s-wave phase shifts as well as the atomic density, which cannot be measured precisely. Here we demonstrate a fundamentally new type of scattering experiment that interferometrically detects the quantum scattering phase shifts of individual atoms. By performing an atomic clock measurement using only the scattered part of each atom, we directly and precisely measure the difference of the s-wave phase shifts for the two clock states in a density independent manner. Our method will give the most direct and precise measurements of ultracold atom-atom interactions and will place stringent limits on the time variations of fundamental constants.
Error analysis of the density-matrix renormalization group algorithm for a chain of harmonic oscillators
Yongjun Ma,Jiaxiang Wang,Xinye Xu,Qi Wei,Sabre Kais
Physics , 2014, DOI: 10.1088/0256-307X/31/6/060501
Abstract: We investigate the application of the density-matrix renormalization group (DMRG) algorithm to a one-dimensional harmonic oscillator chain and compare the results with exact solutions, aiming to improve the algorithm efficiency. It has been demonstrated that the algorithm can give quite accurate results if the procedure is proper organized, for example, by using the optimized bases. The errors of calculated ground state energy and the energy gap between the ground state and the first excited state are analyzed, which are found to be critically dependent upon the size of the system or the energy level structure of the studied system and the number of states targeted during the DMRG procedure.
Quantum phase transition in one-dimensional commensurate Frenkel-Kontorova model
Yongjun Ma,Jiaxiang Wang,Xinye Xu,Qi Wei,Sabre Kais
Physics , 2014, DOI: 10.7566/JPSJ.83.124603
Abstract: In this paper, we have studied the one-dimensional commensurate quantum Frenkel-Kontorova model by a density-matrix renormalization group (DMRG) algorithm. The focus has been on its properties of the entanglement, the coordinate correlation, the ground state energy and the energy gap between the ground state and the first excited one. It is demonstrated that a quantum phase transition (QPT) between the pinned and the sliding phases takes place as the quantum fluctuation, measured by an effective Planck constant $\tilde\hbar$, increases to a threshold value $\tilde \hbar_c$.
A density-matrix renormalization group Study of one-dimensional incommensurate quantum Frenkel-Kontorova model
Yongjun Ma,Jiaxiang Wang,Xinye Xu,Qi Wei,Sabre Kais
Physics , 2014, DOI: 10.7566/JPSJ.83.094605
Abstract: In this paper, the one-dimensional incommensurate quantum Frenkel-Kontorova model is investigate by a density-matrix renormalization group algorithm. Special attention is given to the entanglement and the ground state energy. The energy gap between the ground state and the first excited is also calculated. From all the numerical results, we have observed an obvious property changes from the pinned state to the sliding one as the quantum fluctuation is increased. But no expected quantum critical point can be justified by the present data.
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