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High resolution spectroscopy of two young active late type stars within 20 parsecs of the Sun

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Chinese Journal of Astronomy and Astrophysics 2009年第3期9卷 315-322页

作者： hui-juan wang Jian-Yan Wei National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

We present high-resolution optical echell spectroscopy of HIP 544 and HIP 46843, two nearby solar like stars. The discovery of these young stars at such a close distance to the Sun is really a surprising phenomenon. It will help us to have a better understanding of the structure and evolutionary history of the Milky Way. The radial velocities （RV） of HIP 544 and HIP 46843 are measured to be -6.88±0.13km s^-1 and 8.30±0.16km s^-1, respectively, which are more accurate than before. The equivalent widths （EW） of the Li I 6707.8A absorption line of HIP 544 and HIP 46843 are measured to be 110±5 mA and 195±5 mA respectively. Based on these properties, HIP 544 is estimated to be 100-800Myr old and HIP 46843 30-100Myr old using three relatively creditable methods.

关键词： stars late-type - stars individual (HIP544, HIP46843) - stars activity - techniques radial velocities - techniques spectroscopic

Analysis of the excited Ω_(c) states as the 1/2^(±) pentaquark states with QCD sum rules

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Communications in Theoretical Physics 2021年第3期73卷 78-93页

作者： hui-juan wang Zun-Yan Di Zhi-Gang wang Department of Physics North China Electric Power UniversityBaoding 071003China School of Nuclear Sicence and Engineering North China Electric Power UniversityBeijing 102206China

We construct both the scalar-diquark-scalar-diquark-antiquark type and axialvector-diquark-axialvector-diquark-antiquark type interpolating currents to study the charmed pentaquark:states suscu with J^(p)=1/2^(±).We employ the QCD sum rules to investigate the masses and pole residues of the charmed pentaquark states by taking into account the vacuum condensates up to dimension 13 in the operator product *** calculation results indicate that the scalar-diquark-scalar-diquark-antiquark type and axialvector-diquark-axialvector-diquark-antiquark type charmed pentaquark states suscu with J^(p)=1/2^(-) can be possible candidates of the excited states observed in the LHCb collaboration.

关键词： charmed baryon states charmed pentaquark states QCD sum rules

Equitable Coloring of Three Classes of 1-planar Graphs

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Acta Mathematicae Applicatae Sinica 2018年第2期34卷 362-372页

作者： Xin ZHANG hui-juan wang Lan XU School of Mathematics and Statistics Xidian University Xi'an 710071 China College of Mathematics Qingdao University Qingdao 266071 China Department of Mathematics Changji University Changji 831100 China

A graph is 1-planar if it can be drawn on a plane so that each edge is crossed by at most one other edge. A plane graph with near-independent crossings or independent crossings, say NIC-planar graph or IC-planar graph, is a 1-planar graph with the restriction that for any two crossings the four crossed edges are incident with at most one common vertex or no common vertices, respectively. In this paper, we prove that each 1-planar graph, NIC-planar graph or IC-planar graph with maximum degree A at least 15, 13 or 12 has an equitable △-coloring, respectively. This verifies the well-known Chen-Lih-Wu Conjecture for three classes of 1-planar graphs and improves some known results.

关键词： 1-planar graph equitable coloring independent crossing

Analysis of the 1S and 2S states of Λ_(Q) and Ξ_(Q) with QCD sum rules

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Chinese Physics C 2021年第1期45卷 109-118页

作者： Zhi-Gang wang hui-juan wang Department of Physics North China Electric Power UniversityBaoding 071003China

In this article,we study the ground states and the first radial excited states of the flavor antitriplet heavy baryon states ∧Q and ΞQ with the spin-parity JP=1/2+ by carrying out operator product expansion up to vacuum condensates of dimension 10 in a consistent *** observe for the first time that the higher dimensional vacuum condensates play an important role,and obtain very stable QCD sum rules with variations of the Borel parameters for the heavy baryon *** predicted masses 6.08±0.09 GeV,2.78±0.08 GeV,and 2.96±0.09 GeV for the first radial excited states ∧b(2 S),∧c(2 S),and Ξc(2 S),respectively,are in excellent agreement with the experimental data and support assigning ∧b(6072),∧c(2765),and Ξc(2980/2970) to be the first radial excited states of ∧b,∧c,and Ξc,*** predicted mass 6.24±0.07 GeV for Ξb(2 S) can be confirmed using experimental data in the future.

关键词： heavy baryon states QCD sum rules

Objective visual quality one year after toric IOL implantation for correction of moderate and high corneal astigmatism

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International Journal of Ophthalmology(English edition) 2021年第2期14卷 245-249页

作者： hui Zhong Hong Qin hui-juan wang Zhao-Yi wang Eye Hospital of China Academy of Chinese Medical Sciences Beijing 100040China

AIM:To compare the objective visual quality after implantation of a toric intraocular lens(IOL)in order to correct moderate or high corneal astigmatism at the one year postoperative ***:From December 2017 to June 2018,66 patients(90 eyes)with simple age-related cataract with regular corneal astigmatism greater than 1.5 D were enrolled in this prospective self-control *** patients were implanted with Proming?toric IOL(model:AT3 BH-AT6 BH).The subjects were divided into moderate astigmatism group(46 eyes,1.5-2.5 D)and high astigmatism group(44 eyes,>2.5 D).The uncorrected distance visual acuity,residual astigmatism and axial position of IOL were observed before operation,3,6 mo and 1 y after *** transfer function cutoff(MTF cutoff),Strehl ratio(SR),object scatter index(OSI)were observed by OQAS II to evaluate the objective visual quality of ***:There was no significant difference in UCVA,residual astigmatism,axial deviation,MTF cutoff,SR and OSI between moderate and high astigmatism group(all P>0.05).After 3 mo,UCVA,MTF cutoff and SR were significantly increased(all P<0.05),residual astigmatism and OSI were significantly decreased(all P<0.05).After 3 mo,all the indexes remained ***:Proming toric IOL can effectively treat age-related cataract patients with moderate-to-high regular corneal astigmatism,correcting corneal astigmatism,improving UCVA,ensuring long-term stability in the capsule,and providing patients with better visual quality.

关键词： cataract Toric IOL astigmatism visual quality stability

Line profile analysis of an astronomical spectrograph with a laser frequency comb

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Research in Astronomy and Astrophysics 2014年第8期14卷 1037-1045页

作者： Fei Zhao Gang Zhao Gaspare Lo Curto hui-juan wang Yu-juan Liu Liang wang Wei wang Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences University of Chinese Academy of Sciences Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment School of Space Science and PhysicsShandong University European Southern Observatory Karl-Schwarzschild-Str. 285748 GarchingGermany

We present a study of the spectral line shape associated with a High Resolution Spectrograph on the 2.16 m telescope at the Xinglong Observing Station of National Astronomical Observatories, Chinese Academy of Sciences. This measurement is based on modeling the instrumental line shape obtained by unresolved modes from a Yb-fiber mode-locked laser frequency comb. With the current repetition rate of 250 MHz and 26 GHz mode spacing on the spectrograph, we find the absolute variation of the line center, 0.0597 pixel in the direction of the CCDs, and 0.00275 pixel （～3 m s^-1） for relative variation in successive exposures on a short timescale. A novel double-Gaussian model is presented to improve the quality of the fit by a factor of 2.47 in a typical single exposure. We also use analysis with raw moments and central moments to characterize the change in line shape across the detector. A trend in charge transfer efficiency can be found on the E2V 4096 ×4096 CCD that provides a correction for wavelength calibration aiming to reach a level of precision for radial velocity below 1 m s^- 1.

关键词： techniques radial velocities -- instrumentation laser frequency comb

The AMS measurement of ^236U at CIRCE

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Nuclear Science and Techniques 2017年第7期28卷 47-51页

作者： Yong-Jing Guan hui-juan wang Mario De Cesare Filippo Terrasi Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science & Technology Guangxi University Nanning 530004 China Department of Diagnostic Methodologies and Measurement Techniques Italian Aerospace Research Centre (CIRA) 81043 Capua (CE) Italy INFN 80126 Naples Italy CIRCE Department of Mathematic and Physics Ⅱ University of Naples 81100 Caserta Italy

Accelerator mass spectrometry(AMS) is an ultrasensitive technique for measuring long-lived actinides,e.g.,^(236)U,^(237)Np and Pu *** order to improve the detection limit for actinides abundance,and to increase the detection efficiency in actinides AMS measurement,a 16-strip silicon detector was used to identify actinides at the Center for Isotopic Research on Cultural and Environmental heritage in Caserta,*** sensitivity of ^(236)U/^(238)U was 1×10^(-11) by special resolution and 5.0×10^(-12) by time *** pulse height defect of^(236)U in an ion-implanted silicon detector in the low-energy range with 17.26 MeV is presented.

关键词： AMS 测量锕系元素钚同位素硅探测器加速器质谱时间分辨率元素丰度

A Note on the Minimum Total Coloring of Planar Graphs

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Acta Mathematica Sinica,English Series 2016年第8期32卷 967-974页

作者： hui juan wang Zhao Yang LUO Bin LIU Yan GU Hong Wei GAO College of Mathematics Qingdao University Department of Mathematics Changji University Department of Mathematics Ocean University of China

Graph coloring is an important tool in the study of optimization, computer science, network design, e.g., file transferring in a computer network, pattern matching, computation of Hessians matrix and so on. In this paper, we consider one important coloring, vertex coloring of a total graph, which is also called total coloring. We consider a planar graph G with maximum degree △（G）〉 8, and proved that if G contains no adjacent i,j-cycles with two chords for some i,j E {5,6,7}, then G is total-（△ ＋ 1）-colorable.

关键词： Planar graph total coloring cycle

Evaluation of the diagnostic value of serum-based proteomics for colorectal cancer

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World Journal of Gastrointestinal Oncology 2022年第8期14卷 1562-1573页

作者： hui-juan wang Yi-Bin Xie Peng-Jun Zhang Tao Jiang Department of Respiratory and Critical Care Medicine Beijing Chao-Yang HospitalBeijing Institute of Respiratory MedicineCapital Medical UniversityBeijing 100020China Department of Pancreatic and Gastric Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Interventional Therapy DepartmentPeking University Cancer Hospital and InstituteBeijing 100142China Medical Innovation Research Division of Chinese PLA General Hospital Beijing 100853China

BACKGROUND Colorectal cancer(CRC)is a highly malignant cancer with a high incidence and mortality in *** is urgent to find a diagnostic marker with higher sensitivity and specificity than the traditional approaches for CRC *** To provide new ideas for the diagnosis of CRC based on serum *** Specimens from 83 healthy people,62 colon polyp(CRP)patients,and 101 CRC patients were analyzed by matrix-assisted laser desorption/ionization time-offlight mass *** diagnostic value of the profiles of differentially expressed proteins was then *** Compared with the healthy control group,CRC patients had elevated expression of 5 proteins and reduced expression of 14 *** area under the curve(AUC)for a differentially expressed protein with a mass-to-charge ratio of 2022.34 was the largest;the AUC was 0.843,which was higher than the AUC of 0.717 observed with carcinoembryonic antigen(CEA),and the sensitivity and specificity of this identified marker were 75.3%and 79.5%,*** cross-validation,the accuracy of diagnosis using levels of this differentially expressed protein was 82.37%.Compared with the CRP group,the expression of 3 proteins in the serum of CRC patients was elevated and 11 proteins were expressed at reduced *** possessing mass-to-charge ratio values of 2899.38 and 877.3 were selected to establish a classification tree *** results showed that the accuracy of CRC diagnosis was 89.5%,the accuracy of CRP diagnosis was 81.6%,and the overall accuracy of this approach was 86.3%.The overall sensitivity and specificity of diagnosis using the proteomics approach were 81.8%and 66.75%,*** sensitivities and specificities of diagnoses based on CEA and carbohydrate antigen 19-9 expression were 55.6%and 91.3%and 65.4%and 65.2%,*** We demonstrated that serum proteomics may be helpful for the detection of CRC,and it may assist clinical practice for CRC diagnosis

关键词： Colorectal cancer Colorectal polyps Serum Proteomics Diagnostic value