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Stellar spectra association rule mining method based on the weighted frequent pattern tree

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Research in Astronomy and Astrophysics 2013年第3期13卷 334-342页

作者： jiang-hui cai Xu-Jun Zhao Shi-Wei Sun Ji-Fu Zhang Hai-Feng Yang School of Computer Science and Technology Taiyuan University of Science and Technology National Astronomical Observatories Chinese Academy of Sciences

Effective extraction of data association rules can provide a reliable basis for classification of stellar spectra. The concept of stellar spectrum weighted itemsets and stellar spectrum weighted association rules are introduced, and the weight of a single property in the stellar spectrum is determined by information entropy. On that basis, a method is presented to mine the association rules of a stellar spectrum based on the weighted frequent pattern tree. Important properties of the spectral line are highlighted using this method. At the same time, the waveform of the whole spectrum is taken into account. The experimental results show that the data association rules of a stellar spectrum mined with this method are consistent with the main features of stellar spectral types.

关键词： methods: data analysis -- stars: fundamental parameters -- techniques:spectroscopic -- astronomical data bases: miscellaneous

Development of sympathetic ophthalmia following globe injury

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Chinese Medical Journal 2009年第24期122卷 2961-2966页

作者： ZHANG Ying ZHANG Mao-nian jiang cai-hui YAO Yi Department of Ophthalmology Chinese PLA General HospitalBeijing 100853 China

Background Sympathetic ophthalmia （SO）, a rare, bilateral, diffuse granulomatous uveitis, usually occurs after open globe injury or intraocular surgery. We sought to identify the risk factors for the development of SO after open globe injury and describe their demographic and clinical features and outcomes of treatments. Methods A retrospective study of inpatients with globe injury in 15 tertiary referral hospitals of China from January 2001 to December 2005 was conducted. The information of demography, nature and mechanism of injury, time and ways of treatments and outcomes was reviewed. Diagnosis of SO was made based on a history of ocular trauma or surgery and subsequent development of bilateral or contralateral uveitis consistent with SO. Any association between related parameters and development of SO was analyzed. Results Among 9103 patients （9776 eyes） of globe injury, SO occurred after open globe injury in 18 cases with an occurrence rate of 0.37%, vitrectomy of closed globe injury in 2 （0.37%） and perforation of burned eyes in another 2. For open globe injury, the median age （（36.72±13.59） years, P=0.01） was higher in patients with SO; there were no significant effects of sexes, injury type, uvea proplaps, once or multi-intraocular surgery, once or multi-vitrectomy and endophthalmitis on incidence of SO; 0.70% endophthalmitis concurred with SO; 83.33% of SO occurred within 1 year after injury or last ocular surgery. SO developed in a fellow eye one week after evisceration of the perforating burned eye. Good final visual acuity was obtained in sympathizing eyes with prompt treatment. Conclusions For open globe injuries, SO sufferers were relatively older and any injury type could induce SO with equal possibility. The initial open globe injury was more likely to be the trigger of SO than subsequent intraocular surgeries including vitrectomy. Prophylactic enucleation after injury is not recommended.

关键词： sympathetic ophthalmia eye injury intraocular sugery risk factors

An in-depth Exploration of LAMOST Unknown Spectra Based on Density Clustering

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Research in Astronomy and Astrophysics 2023年第5期23卷 52-65页

作者： Hai-Feng Yang Xiao-Na Yin jiang-hui cai Yu-Qing Yang A-Li Luo Zhong-Rui Bai Li-Chan Zhou Xu-Jun Zhao Ya-Ling Xun Shanxi Key Laboratory of Big Data Analysis and Parallel Computing Taiyuan University of Science and TechnologyTaiyuan 030024China School of Computer Science and Technology Taiyuan University of Science and TechnologyTaiyuan 030024China School of Computer Science and Technology North University of ChinaTaiyuan 030051China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Large sky Area Multi-Object fiber Spectroscopic Telescope(LAMOST) has completed the observation of nearly 20 million celestial objects,including a class of spectra labeled “Unknown.” Besides low signal-to-noise ratio,these spectra often show some anomalous features that do not work well with current *** this paper,a total of 637,889 “Unknown” spectra from LAMOST DR5 are selected,and an unsupervised-based analytical framework of “Unknown” spectra named SA-Frame(Spectra Analysis-Frame) is provided to explore their origins from different *** SA-Frame is composed of three parts:NAPC-Spec clustering,characterization and origin ***,NAPC-Spec(Nonparametric density clustering algorithm for spectra) characterizes different features in the “unknown” spectrum by adjusting the influence space and divergence distance to minimize the effects of noise and high dimensionality,resulting in 13 ***,characteristic extraction and representation of clustering results are carried out based on spectral lines and continuum,where these 13 types are characterized as regular spectra with low S/Ns,splicing problems,suspected galactic emission signals,contamination from city light and un-gregarious type ***,a preliminary analysis of their origins is made from the characteristics of the observational targets,contamination from the sky,and the working status of the *** results would be valuable for improving the overall data quality of large-scale spectral surveys.

关键词： methods data analysis-surveys-techniques spectroscopic-site testing-methods analytical

A sample of E+A galaxy candidates in the Second Data Release of LAMOST Survey

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Research in Astronomy and Astrophysics 2015年第8期15卷 1414-1423页

作者： Hai-Feng Yang A-Li Luo Xiao-Yan Chen Wen Hou Jian-Nan Zhang Wei Du Ji-Fu Zhang jiang-hui cai Yan-Xin Guo Shuo Zhang Yong-Heng Zhao Hong Wu Ting-Gui Wang Shi-Yin Shen Ming Yang Yong Zhang Yong-hui Hou Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences School of Computer Science and Technology Taiyuan University of Science and Technology University of Chinese Academy of Sciences Center for Astrophysics University of Science & Technology of China Shanghai Astronomical Observatory Chinese Academy of Sciences Nanjing Institute of Astronomical Optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences

A sample of 70 E＋A galaxies is selected from 37 206 galaxies in the second data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST）. This sample is selected according to the criteria for E＋A galaxies defined by Goto, and each of these objects is further visually identified. In this sample, most objects are low redshift E＋A galaxies with z 〈 0.25, and are located in an area of the sky with high Galactic latitude and magnitude from 14 to 18 mag in the g, r and i bands. A stellar population analysis of the whole sample indicates that the E＋A galaxies are characterized by both young and old stellar populations（SPs）, and the metalrich SPs have relatively higher contributions than the metal-poor ones. Additionally, a morphological classification of these objects is performed based on images taken from the Sloan Digital Sky Survey.

关键词： galaxies: evolution—galaxies: formation—galaxies: interactions—galaxies: peculiar—galaxies: starburst

Structure and Catalytic Activity of Nickel-substituted Mica- montmorillonite Clay Crosslinked with NH2(C3H3)Si(OC2H5)2

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Chemical Research in Chinese Universities 1990年第1期6卷 32-40页

作者： jiang Dazhen, cai hui, Liu Ziyang and Zhou Qun (Department of Chemistry, Jilin University, Changchun)Min Enze and He Mingyuan (Research Institute of Petroleum Processing, Beijing)

Nickel-substituted mica-montmorillonite clays(Ni-SMM) were synthesized, the pillared clays, Si-Ni-SMM, were prepared from the Ni-SMM intercalated with NH2(C3H5)Si(OC2H5)*** pillar perhaps consists of tripolymer of silica according to the judgement from the pillar height (8. 5A ) data. The results of IR, ESR and XRD indicate that the hydroxy group in the octahedral layer is attacked by crosslinking agent. Thus the silicon oxide pillars become directly linked via oxygen to the nickel atoms in the octahedral layer. The change of the ratio of Lewis to Bronsted acidity on Si-Ni-SMM reduced at 400℃ by H2 shows that the hydrogenating component such as Ni in the framework of SMM plays an important role in catalyst deactivation in H, atmosphere. This kind of action may be due to spilled- over hydrogen.

关键词： Nickel-substituted mica-montmorillonite Silicon pillar Acidity cracking

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视网膜干细胞移植任重而道远

眼科 2011年第4期20卷 226-229页

作者：姜彩辉张卯年解放军总医院眼科北京100853

进行性视网膜感光细胞的死亡是许多视网膜变性疾病的共同特征。现有的治疗方法不能恢复已经丧失的视功能。视网膜干细胞移植研究的不断深入在为视网膜变性患者带来希望的同时也面临一些严峻挑战:如何获得理想的视网膜干细胞?如何诱导视... 详细信息

进行性视网膜感光细胞的死亡是许多视网膜变性疾病的共同特征。现有的治疗方法不能恢复已经丧失的视功能。视网膜干细胞移植研究的不断深入在为视网膜变性患者带来希望的同时也面临一些严峻挑战:如何获得理想的视网膜干细胞?如何诱导视网膜干细胞分化成视杆及视锥细胞?如何诱导移植的细胞与受体细胞形成功能性突触连接?感光细胞丧失的早期,内部的视网膜神经通路是完整的,新的感光细胞只需与双极细胞形成突触连接就能恢复完整的视网膜神经通路。而感光细胞替换通常比其它神经元更直接更容易。因为感光细胞是感觉神经元,只在一个方向上与双极细胞-水平细胞形成连接。另外,视网膜特殊的层状结构决定了视网膜外层的感光细胞层是视网膜干细胞移植最理想的位置。视网膜干细胞研究的进展、视网膜变性疾病的特征及视网膜的特殊结构让我们有理由相信,干细胞移植的成功将首先来自视网膜感光细胞移植。

关键词：视网膜变性疾病视网膜干细胞移植细胞分化突触连接

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie Bai Jian hui Jia Yu Wang Chun Cheng Yang Qing jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

Epidemiology of eye injuries sustained by military personnel in China

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Chinese Journal of Traumatology 2011年第6期14卷 359-362页

作者： XIAO Jian-he ZHANG Mao-nian jiang cai-hui ZHANG Ying QIU Huai-yu Department of Ophthalmology General Hospital of Chinese PLA Beijing 100853 China

Objective： To investigate the epidemiological characteristics of eye injuries sustained by military personnel in Chinese army. Methods： Eleven military evacuation hospitals located in different regions were selected for this study. We reviewed all the medical records of eye injuries sustained by military personnel between January 2005 and December 2009. Patients＇ information was collected. All data were put into database and analyzed statistically. Results： Totally there were 415 inpatients with eye injuries （442 eyes） and their mean age was 24.40 years. Eye injury accounts for 13.51% of all eye diseases in this study. From 2006 to 2009, the number of eye injury increased gradually. Among them, 175 （42.17%） were injured in leisure time, and 145 （34.94%） in working time. Twenty-two （5.30%） patients had an eye surgery or history of eye disease before injury. In all, 246 patients （59.28%） were sent to evacuation hospital within 24 hours and 64 （56.64%） underwent surgeries in 24 hours after injury. There were 389 patients （93.73%） hospitalized for 1 time. Visual acuities of 187 eyes （42.31%） were grade 1 （≥ 20/40） after injury. When discharge, 349 eyes （78.96%） obtained a visual acuity of grade 1. Conclusion： Eye injury has a very frequent incidence in Chinese army and much more attention should be paid to prevent it.

关键词： Epidemiology Eye injuries Militaryhygiene Military personnel

Laser in situ keratomiileusis surgery is not safe for military personnel

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Chinese Journal of Traumatology 2012年第2期15卷 77-80页

作者： XIAO Jian-he ZHANG Mao-nian jiang cai-hui ZHANG Ying QIU Huai-yu Department of Ophthalmology Chinese PLA General HospitalBeijing 100853China

Objective： To investigate the relationship between eye injury and laser in-situ keratomileusis （LASIK） surgery in military personnel. Methods： This retrospective study collected the data from 27 evacuation hospitals of Chinese army. All medical records of eye injuries in military personnel admitted to the 27 hospitals between January 2006 and December 2010 were reviewed. Patients＇ detailed information was analyzed, including the injury time, place, type, cause, as well as examination, treatment and outcome. Results： There were 72 eye-injured patients who had been treated by LASIK before. The incidence was risingyear by year. Among them, 69 patients were diagnosed with mechanical ocular injury and 3 with non-mechanical ocular injury; 29 patients had traumatic flap-related complications and 21 patients need surgery. There was statistical difference when compared with those having no refractive sur- gery history. Visual acuity recovered well at discharge. Conclusion： There is a high risk of potential traumatic flap problems after LASIK and it is not recommended in army service.

关键词： Eye injuries Military personnel Keratomileusis, laser in situ