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Real-time abnormal light curve detection based on a Gated Recurrent Unit network

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Research in Astronomy and Astrophysics 2020年第1期20卷 49-56页

作者： Rui-Qing Yan Wei Liu Meng Zhu Yi-Jing Wang Cong Dai shuo cao Kang Wu Yu-Chen Liang Xian-Chuan Yu Meng-Fei Zhang College of Information Science and Technology Beijing Normal UniversityBeijing 100875China Department of Astronomy Beijing Normal UniversityBeijing 100875China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Targeting the problem of high real-time requirements in astronomical data processing,this paper proposes a real-time early warning model for light curves based on a Gated Recurrent Unit(GRU)*** the memory function of the GRU network,a prediction model of the light curve is established,and the model is trained using the collected light curve data,so that the model can predict a star magnitude value for the next moment based on historical star magnitude *** this paper,we calculate the difference between the model prediction value and the actual observation value and set a *** the difference exceeds the set threshold,the observation value at the next moment is considered to be an abnormal value,and a warning is *** can carry out further certification based on the early warning and in combination with other means of *** method proposed in this paper can be applied to real-time observations in time domain astronomy.

关键词： methods:data analysis techniques:photometric stars:variables:general

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Structural variation and parallel evolution of apomixis in citrus during domestication and diversification

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National Science Review 2022年第10期9卷 82-97页

作者： Nan Wang Xietian Song Junli Ye Siqi Zhang Zhen cao Chenqiao Zhu Jianbing Hu Yin Zhou Yue Huang shuo cao Zhongjie Liu Xiaomeng Wu Lijun Chai Wenwu Guo Qiang Xu Brandon S.Gaut Anna M.G.Koltunow Yongfeng Zhou Xiuxin Deng Key Laboratory of Horticultural Plant Biology (Ministry of Education) Huazhong Agricultural University Shenzhen Branch Guangdong Laboratory of Lingnan Modern Agriculture Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural Sciences Department of Ecology and Evolutionary Biology University of California Irvine Queensland Alliance for Agriculture and Food Innovation University of Queensland

Apomixis,or asexual seed formation,is prevalent in Citrinae via a mechanism termed nucellar or adventitious ***,multiple embryos of a maternal genotype form directly from nucellar cells in the ovule and can outcompete the developing zygotic embryo as they utilize the sexually derived endosperm for *** nucellar embryony enables the propagation of clonal plants of maternal genetic constitution,it is also a barrier to effective breeding through *** address the genetics and evolution of apomixis in Citrinae,a chromosome-level genome of the Hongkong kumquat(Fortunella hindsii) was assembled following a genome-wide variation map including structural variants(SVs) based on234 Citrinae *** map revealed that hybrid citrus cultivars shelter genome-wide deleterious mutations and SVs into heterozygous states free from recessive selection,which may explain the capability of nucellar embryony in most cultivars during Citrinae *** reve aled that parallel evolution may explain the repeated origin of apomixis in different genera of *** Fortu nella,we found that apomixis of some varieties originated via *** apomictic Fortunella,the locus associated with apomixis contains the FhRWP gene,encoding an RWP-RK domain-containing protein previously shown to be required for nucellar embryogenesis in *** found the heterozygous SV in the FhRWP and CitRWP promoters from apomictic Citrus and Fortunella,due to either two or three miniature inverted transposon element(MITE) insertions.A transcription factor,FhARID,encoding an AT-rich interaction domain-containing protein binds to the MITEs in the promoter of apomictic varieties,which facilitates induction of nucellar *** study provides evolutionary genomic and molecular insights into apomixis in Citrinae and has potential ramifications for citrus breeding.

关键词： genomics evolution population genetics apomixis

基于D-P准则和西原模型的圆形隧道黏弹-黏塑性解

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岩土力学 2021年第7期42卷 1925-1932页

作者：曹朔喻勇汪波西南交通大学力学与工程学院四川成都610031 成都理工大学地质灾害防治与地质环境保护国家重点实验室四川成都610059 西南交通大学应用力学与结构安全四川省重点实验室四川成都610031 西南交通大学土木工程学院四川成都610031

为了较好地描述圆形隧道开挖后围岩的流变特性,假设围岩本构模型为西原模型,选用Drucker-Prager屈服准则,考虑塑性区的黏性与剪胀特性,推导了圆形隧道开挖后围岩塑性区半径、应力、位移的理论解。当剪胀角ψ=0°时,这些解答转化为体积... 详细信息

为了较好地描述圆形隧道开挖后围岩的流变特性,假设围岩本构模型为西原模型,选用Drucker-Prager屈服准则,考虑塑性区的黏性与剪胀特性,推导了圆形隧道开挖后围岩塑性区半径、应力、位移的理论解。当剪胀角ψ=0°时,这些解答转化为体积不变假设下基于Mohr-Coulomb准则和西原模型的黏弹-黏塑性解。通过具体算例,分析了剪胀角对塑性区半径、洞壁位移和应力场的影响。将黏弹-黏塑性位移解和黏弹-塑性位移解进行了对比分析。结果表明:围岩达到稳态之前,剪胀角对应力场和塑性区半径影响较小,对洞壁位移影响较大。稳态围岩的应力场和塑性区半径与剪胀角取值无关。稳态围岩洞壁位移随着剪胀角的增大有较为明显的增加。塑性区的黏性特性对围岩的稳态应力没有影响,对围岩的稳态洞壁位移有较大的影响。剪胀角较大时,应考虑塑性区的黏性,否则会低估稳态围岩洞壁位移。研究结果对实际工程有一定的参考价值。

关键词：黏弹-黏塑性西原模型剪胀 Drucker-Prager屈服准则理论解

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Visible light promoted cleavage of enaminone C=C bond for the synthesis of vicinal diketones and quinoxalines

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Visible light promoted cleavage of enaminone C=C bond for th...

中国化学会第九届全国有机化学学术会议

作者： shuo cao Yunyun Liu Jie-Ping Wan College of Chemistry and Chemical Engineering Jiangxi Normal University

Vicinal 1,2-diketones are important organic compounds with versatile reactivity in the synthesis of numerous chemical products. The extensive research interest in the synthesis of vicinal diketones has led to the occurrence of many elegant synthetic methods towards these *** our continuous efforts in exploring the enaminone-and related enamine-based organic3

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再生医学对糖尿病足创面修复作用的研究进展

中国美容医学 2024年第10期33卷 178-182页

作者：彭艳戴雯婷聂君毅谢汶芹曹硕(综述) 侯秀英李勤雨袁佩雯(审校) 山西医科大学第一临床医学院山西太原030001 山西医科大学第一医院整形外科山西太原030001

糖尿病足溃疡(Diabetic foot ulcers,DFUs)是糖尿病晚期的严重并发症,是糖尿病患者致残、致死的主要原因之一,在我国发病率逐年升高,已成为加重社会负担的重大公共卫生问题。DFUs由内外多重因素导致,包括糖代谢紊乱所致皮肤微环境变化... 详细信息

糖尿病足溃疡(Diabetic foot ulcers,DFUs)是糖尿病晚期的严重并发症,是糖尿病患者致残、致死的主要原因之一,在我国发病率逐年升高,已成为加重社会负担的重大公共卫生问题。DFUs由内外多重因素导致,包括糖代谢紊乱所致皮肤微环境变化、感染、创伤等,往往难以治愈,消耗高昂的医疗资源。因此,找到更有效的疗法非常重要。目前,糖尿病足创面的常规治疗已渐渐被再生医学疗法如干细胞、富血小板血浆、外泌体和功能性RNAs等取代。本文根据最新研究进展对糖尿病足难愈创面的再生医学修复方式予以综述。

关键词：糖尿病足溃疡干细胞富血小板血浆外泌体核糖核酸

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Markedly enhancement of mechanical performances for carbon fiber fabric reinforced polypropylene(CFF/PP) composites

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Markedly enhancement of mechanical performances for carbon f...

1,2-Acyl migration-based cascade reaction for the metal- and azide-free synthesis of 1,5-disubstituted 1,2,3-triazoles

第十九届全国复合材料学术会议

作者： Zhao ZHANG shuo cao 朱姝 Muhuo YU Key Laboratory of Shanghai City for lightweight composites Donghua University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University

In this study, the effect of incorporated maleic anhydride grafted polypropylene(MAPP) coupling agents on the mechanical properties of carbon fiber fabric(CFF) reinforced polypropylene(PP) composite and the interfacial adhesion between CFF and PP matrix were investigated. A series of composite laminates of CFF/PP with different content of MAPP have been prepared through compression‐molding processing. It was observed from SEM micrographs that with the addition of MAPP, more PP matrix covered the pulled‐out CFF and less debonding could be found at the CFF/PP interfaces. As the result of improved interfacial adhesion, the tensile strength and modulus, flexural strength and modulus, impact strength, and interlaminar shearing strength all markedly increased by 2 to 10 folds with the loading of MAPP, until a certain concentration of 10‐15 wt. %, and then approached to a plateau or turned to decrease with more addition of MAPP.

关键词： carbon fiber fabric(CFF) mechanical properties maleated polypropylene(MAPP) interface adhesion

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1,2-Acyl migration-based cascade reaction for the metal- and...

Observation of coupling between zero- and two- dimensional semiconductor systems based on anomalous diamagnetic effects

中国化学会第九届全国有机化学学术会议

作者： Jie-Ping Wan shuo cao Yunyun Liu College of Chemistry and Chemical Engineering Jiangxi Normal University

＜正＞The 1,2,3-triazole heterocycle constitutes invaluable organic compounds possessing tremendous application in organic synthesis,materials and biological *** synthesis of 1,2,3-triazoles is a central issue of mode...

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Nano Research 2016年第2期9卷 306-316页

作者： shuo cao Jing Tang Yue Sun Kai Peng Yunan Gao Yanhui Zhao Chenjiang Qian Sibai Sun Hassan Ali Yuting Shao Shiyao Wu Feilong Song David A. Williams Weidong Sheng Kuijuan Jin Xiulai Xu Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Hitachi Cambridge Laboratory Cavendish Laboratory Cambridge CB3 OHE UK Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China

We report the direct observation of coupling between a single self-assembled InAs quantum dot and a wetting layer, based on strong diamagnetic shifts of many-body exciton states using magneto-photoluminescence spectroscopy. An extremely large positive diamagnetic coefficient is observed when an electron in the wetting layer combines with a hole in the quantum dot; the coefficient is nearly one order of magnitude larger than that of the exciton states confined in the quantum dots. Recombination of electrons with holes in a quantum dot of the coupled system leads to an unusual negative diamagnetic effect, which is five times stronger than that in a pure quantum dot system. This effect can be attributed to the expansion of the wavefunction of remaining electrons in the wetting layer or the spread of electrons in the excited states of the quantum dot to the wetting layer after recombination. In this case, the wavefunction extent of the final states in the quantum dot plane is much larger than that of the initial states because of the absence of holes in the quantum dot to attract electrons. The properties of emitted photons that depend on the large electron wavefunction extents in the wetting layer indicate that the coupling occurs between systems of different dimensionality, which is also verified from the results obtained by applying a magnetic field in different configurations. This study paves a new way to observe hybrid states with zero- and two-dimensional structures, which could be useful for investigating the Kondo physics and implementing spin-based solid-state quantum information processing.

关键词： magneto-photoluminescence InAs quantum dots wetting layer strong diamagnetic effects

Latent Heat of TB18 Titanium Alloy during β to α Phase Transition by DSC and First-Principles Methods

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1844-1856页

作者： Yan-Di Jia shuo cao Ying-Jie Ma Sen-Sen Huang Feng-Ying Qin Shao-Qiang Li Wei Xiang Qian Wang Qing-Miao Hu Bo Li Jia-Feng Lei Jing Xie Xiang-Hong Liu Rui Yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China AVIC The First Aircraft InstituteXi’an710089China Western Superconducting Technologies Co.Ltd.Xi’an710018China China National Erzhong Group Deyang Wanhang Die Forging Co. Ltd.Deyang618000China

The phase transition of titanium alloys is sensitive to the heat-treatment procedure,accompanied with the latent heat induced by phase ***,the latent heat during phase transition of titanium alloy has not been systematically studied,which may result in the gap between designed and actual temperature of the sample and affect the final mechanical *** this work,DSC(differential scanning calorimetry)and first-principles simulate methods were used to study theβ→αphase transition process of TB18(Ti–Al-Mo-V-Cr-Nb-Fe system)metastableβtitanium alloy,especially to reveal the influence of the heating rate on latent *** ratio of latent heat to endothermic heat of the sample during temperature rising was introduced to interpret the effect of latent heat to actual *** ratio of latent heat to endothermic heat at 1℃/min is about 15 to 20 times higher than that at 10℃/*** higher ratio indicates that the latent heat of phase transition has a more significant effect on the temperature,which is related to the temperature range of phase transition and theαvolume *** with the heating rate of 1℃/min,theβ→αphase transition takes place at higher temperature and the volume fraction ofαis smaller at 10℃/***,there is a precipitation free zone between grain boundaryαand intragranularαand the distribution ofαlamellae is heterogeneous when the heating rate is 10℃/*** of the experimental and theoretical results suggest that the latent heat of phase transition is the main cause of the temperature fluctuation during heat-treatment *** work has guiding significance for microstructure optimization affected by temperature,to achieve the desired mechanical properties.

关键词： High-strength titanium alloys Latent heat Phase transition Differential scanning calorimetry(DSC) First-principles calculation