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Research in Astronomy and Astrophysics 2024年第6期24卷 225-233页

作者： Xue-Feng Lu Li-Ming Song Ming-yu Ge Shuang-Nan Zhang Jin-Lu Qu Ce Cai cong-Zhan Liu Cheng-Kui Li yu-cong fu Ying-Chen Xu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Department of Astronomy Beijing Normal UniversityBeijing 100875China

In October 2022,the magnetar SGR J1935+2154 entered the active outburst *** the episode,the InsightHXMT satellite carried out a long observation that lasted for 20 *** than 300 bursts were detected,and a certain amount of persistent radiation signals were also *** paper mainly introduces the results of persistent radiation profile folding and period search based on Insight-HXMT *** the same time,the burst phase distribution characteristics,spectral lag results of burst,the spectral characteristics of zero-lag bursts and the time-resolved spectral evolution characteristics of high-flux bursts are *** found that there is no significant delay feature during different energy bands for the bursts of SGR J1935+*** observed zero-lag burst does not have a unique *** time-resolved spectrum of the individual burst has consistent spectral types and spectral parameters at different time periods of the *** also find that the burst number phase distribution and the burst photon phase distribution have the same tendency to concentrate in specific regions of the persistent emission profile.

关键词： radiation mechanisms:general dense matter magnetic fields

Burst Phase Distribution of SGR J1935+2154 Based on Insight-HXMT

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Research in Astronomy and Astrophysics 2023年第3期23卷 68-74页

作者： Xue-Feng Lu Li-Ming Song Ming-yu Ge You-Li Tuo Shuang-Nan Zhang Jin-Lu Qu Ce Cai Sheng-Lun Xie cong-Zhan Liu Cheng-Kui Li yu-cong fu Ying-Chen Xu Tian-Ming Li Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Institute of Astrophysics Central China Normal UniversityWuhan 430079China

On 2020 April 27,the soft gamma-ray repeater SGR J1935+2154 entered its intense outburst episode ***-HXMT carried out about one month observation of the source.A total number of 75 bursts were detected during this activity episode by Insight-HXMT,and persistent emission data were also *** report on the spin period search result and the phase distribution of burst start times and burst photon arrival times of the Insight-HXMT high energy detectors and Fermi/Gamma-ray Burst Monitor(GBM).We find that the distribution of burst start times is uniform within its spin phase for both Insight-HXMT and Fermi/GBM observations,whereas the phase distribution of burst photons is related to the type of a burst’s energy *** bursts with the same spectrum have different distribution characteristics in the initial and decay episodes for the activity of magnetar SGR J1935+2154.

关键词： spectrum Fermi distribution

Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

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Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang Cheng Hao Tongtong fu Dian yu Jane Howe Kaiwen Chen Ning Yan Hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

Spectral and Timing Analysis of the Black Hole Transient MAXI J1631–479 During its 2019 Outburst Observed with Insight-HXMT

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Research in Astronomy and Astrophysics 2022年第11期22卷 21-33页

作者： yu-cong fu L.M.Song G.Q.Ding S.N.Zhang J.L.Qu S.Zhang L.Zhang Q.C.Bu Y.Huang X.Ma Z.X.Yang Y.L.Tuo X.F.Lu D.K.Zhou B.Y.Wu T.M.Li Y.C.Xu Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqiXinjiang 830011China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls UniversitatSand 1D-72076 TübingenGermany

We report spectral and timing analysis of the black hole transient MAXI J1631–479 during the hard intermediate state of its 2019 outburst from the Insight-Hard X-ray Modulation Telescope(Insight-HXMT)*** find that the energy dependence of the type-C quasi-periodic oscillation(QPO)frequency evolves with time:during the initial rise of a small flare(~MJD 58526.0-58527.1),the QPO frequency increases with increasing energy from~1 to~100 ke V,and then the frequency remains constant after MJD *** discover a possible new phenomenon of Fe line’s QPO frequency jump that has never been observed for other black hole transients:during the small flare,the QPO frequency around the Fe line energy is higher than any other energy band,with the frequency difference Δf=0.25±0.08 Hz between 5.5–7.5 ke V and other energy *** spectral analysis shows that the evolution of QPOs is related to the equivalent width of the narrow Fe line,and its equivalent width increases during this small *** propose that the QPO frequency difference results from the differential precession of a vertically extended jet,and the higher QPO frequency of Fe line could be caused by the layered jet when the jet scale *** the same time,the evolution of QPOs is related to the accretion rate,while the energy dependence of QPOs supports the existence of deceleration in the vertically distributed jet.

关键词： accretion accretion disks stars:black holes X-rays:binaries

Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-fu Xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

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智能温室精细化控制中传感器布点的研究

节水灌溉 2017年第10期 74-78,83页

作者：万博雨付聪郑世健范玉德刘知贵西南科技大学信息工程学院四川绵阳621000 中国物理研究院化工材料研究所四川绵阳621000

针对智能温室变量施水作业中土壤水分传感器部署问题,提出一种将规则网格化和Delaunay三角剖分算法相结合的布点方法。该方法通过规则网格化,将温室种植区域土壤离散成多个正方形网格,再对每个正方形网格进行Delaunay三角剖分。考虑到... 详细信息

针对智能温室变量施水作业中土壤水分传感器部署问题,提出一种将规则网格化和Delaunay三角剖分算法相结合的布点方法。该方法通过规则网格化,将温室种植区域土壤离散成多个正方形网格,再对每个正方形网格进行Delaunay三角剖分。考虑到土壤含水量存在空间变异性,利用变异系数对剖分的三角网格进行约束,将局部变异性较大的三角网格再次细分,实现少量传感器确定温室土壤含水量分布特征。利用MATLAB确定土壤含水量变异系数阈值,对最终部署点的采样值使用Kriging插值与实际土壤含水量三维分布图对比验证,并通过对照实验验证了算法的正确性,为温室精细化变量施水作业奠定基础。

关键词：传感器部署规则网格 Delaunay三角剖分空间变异性 Kriging插值

Loss Aware Feature Attention Mechanism for Class and Feature Imbalance Issue

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Computers, Materials & Continua 2025年第1期82卷 751-775页

作者： yuewei Wu Ruiling fu Tongtong Xing fulian Yin College of Information and Communication Engineering Communication University of ChinaBeijing100024China State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing100024China

In the Internet era,recommendation systems play a crucial role in helping users find relevant information from large *** imbalance is known to severely affect data quality,and therefore reduce the performance of recommendation *** to the imbalance,machine learning algorithms tend to classify inputs into the positive(majority)class every time to achieve high prediction *** can be categorized such as by features and classes,but most studies consider only class *** this paper,we propose a recommendation system that can integrate multiple networks to adapt to a large number of imbalanced features and can deal with highly skewed and imbalanced datasets through a loss *** propose a loss aware feature attention mechanism(LAFAM)to solve the issue of feature *** network incorporates an attention mechanism and uses multiple sub-networks to classify and learn *** better results,the network can learn the weights of sub-networks and assign higher weights to important *** propose suppression loss to address class imbalance,which favors negative loss by penalizing positive loss,and pays more attention to sample points near the decision *** on two large-scale datasets verify that the performance of the proposed system is greatly improved compared to baseline methods.

关键词： Imbalanced data deep learning e-commerce recommendation loss function big data analysis

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基于AVR的自动灌装系统控制单元设计

长春理工大学学报（自然科学版） 2016年第6期39卷 98-101页

作者：方向明于中伟王聪付飞蚺长春理工大学计算机科学技术学院长春130022 长春理工大学电子信息工程学院长春130022

提出了一种基于AVR的自动灌装系统控制单元设计方案。利用自动控制思想方法对自动灌装系统的结构设计、软硬件选择等给出详细的解决方案。系统采用8位处理器,对称重传感器的电压信号采集、转换,最后通过数字滤波处理,将处理结果显示在LC... 详细信息

提出了一种基于AVR的自动灌装系统控制单元设计方案。利用自动控制思想方法对自动灌装系统的结构设计、软硬件选择等给出详细的解决方案。系统采用8位处理器,对称重传感器的电压信号采集、转换,最后通过数字滤波处理,将处理结果显示在LCD上,将控制信号发送给执行机构控制灌装系统动作。仿真实验表明该系统具有好的自实用性和强的鲁棒性、可靠性,能够集成在多种灌装环境中,具有广阔的市场应用前景。

关键词：单片机控制系统自动灌装

精氨酰-tRNA合成酶在局灶性脑缺血再灌注大鼠中的表达及机制研究

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实用心脑肺血管病杂志 2016年第6期24卷 54-58页

作者：沈寅范云智范宇葱符荣华中科技大学同济医学院附属协和医院神经外科湖北省武汉市430030

背景目前,临床上针对哺乳动物氨基酰-tRNA合成酶的研究主要集中在精氨酰-tRNA合成酶、亮氨酰-tRNA合成酶、甲硫氨酰-tRNA合成酶、丙氨酰-tRNA合成酶的结构和功能方面,对哺乳动物尤其是大鼠脑缺血与氨基酰-tRNA合成酶关系的研究报道极少... 详细信息

背景目前,临床上针对哺乳动物氨基酰-tRNA合成酶的研究主要集中在精氨酰-tRNA合成酶、亮氨酰-tRNA合成酶、甲硫氨酰-tRNA合成酶、丙氨酰-tRNA合成酶的结构和功能方面,对哺乳动物尤其是大鼠脑缺血与氨基酰-tRNA合成酶关系的研究报道极少。目的探讨精氨酰-tRNA合成酶在局灶性脑缺血再灌注大鼠中的表达及机制。方法选取清洁级健康雄性SD大鼠60只,其中4只大鼠进行预实验,采用线栓法栓塞大脑中动脉建立局灶性脑缺血再灌注模型。然后将剩余的56只大鼠随机分为正常组8只、假手术组8只、脑缺血再灌注组40只。正常组不做任何外科处理;假手术组大鼠外科操作步骤与脑缺血再灌注组相同,只是线栓不进入颈内动脉、不造成脑缺血;脑缺血再灌注组大鼠建立局灶性脑缺血再灌注模型。采用反转录-聚合酶链反应(RT-PCR)测定正常组、假手术组、脑缺血再灌注组大鼠再灌注后不同时间点精氨酰-tRNA合成酶mRNA相对表达量,采用Western Blotting法测定正常组、假手术组、脑缺血再灌注组大鼠再灌注后不同时间点精氨酰-tRNA合成酶蛋白相对表达量。结果假手术组与脑缺血再灌注组大鼠再灌注2 h、脑缺血再灌注组再灌注48 h精氨酰-tRNA合成酶mRNA相对表达量及蛋白相对表达量比较,差异无统计学意义(P>0.05);假手术组大鼠精氨酰-tRNA合成酶mRNA相对表达量及蛋白相对表达量均低于脑缺血再灌注组再灌注6 h、12 h及24 h(P<0.05);脑缺血再灌注组大鼠再灌注6 h精氨酰-tRNA合成酶mRNA相对表达量及蛋白相对表达量均高于再灌注2 h和12 h(P<0.05);脑缺血再灌注组大鼠再灌注24 h精氨酰-tRNA合成酶mRNA相对表达量及蛋白相对表达量均高于再灌注12 h和48 h(P<0.05)。结论大鼠局灶性脑缺血再灌注后6 h及24 h精氨酰-tRNA合成酶表达明显升高,可能与缺血和再灌注两次损伤有关。

关键词：脑缺血再灌注损伤精氨酰-tRNA合成酶

Lipomatous ependymoma with ZFTA:RELA fusion-positive:A case report

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World Journal of Clinical Cases 2025年第1期13卷 48-55页

作者： Xiao-yu Zhao Juan-Han yu Yi-Hua Wang Yi-Xin Liu Lu Xu Lin fu Ning Yi China Medical University The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Department of Pathology The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Anshan Cancer Hospital Anshan 114000Liaoning ProvinceChina

BACKGROUND Ependymoma with lipomatous differentiation is a rare type of *** ZFTA fusion-positive supratentorial ependymoma is a novel tumor type in the 2021 World Health Organization classification of central nervous system *** fusion-positive lipomatous ependymoma has not been reported to *** SUMMARY We reported a case of a 15-year-old Chinese male who had a sudden convulsion lasting approximately six *** resonance imaging showed a round cystic shadow of approximately 1.9 cm×1.5 cm×1.9 cm under the right parieto-occipital *** examination showed characteristic perivascular pseudorosettes and adipose differentiation in the ***-chemical staining showed that the tumor cells were negative for cytokeratin,NeuN,Syn and p53,but positive for GFAP,vimentin and S-100 ***-ficant punctate intracytoplasmic EMA immunoreactivity was *** level of Ki-67 was about 5%.Genetic analysis revealed ZFTA:RELA fusion.A cranio-tomy with total excision of the tumor was *** follow-up time was 36 months,no evidence of disease recurrence was found in magnetic resonance *** Based on these findings,the patient was diagnosed as a ependymoma with ZFTA fusion and lipomatous *** case report provides information on the microscopic morphological features of ependymoma with ZFTA fusion and lipomatous differentiation,which can help pathologists to make a definitive diagnosis of this tumor.

关键词： Ependymoma Lipomatous Molecular classification Supratentorial ZFTA:RELA fusion Case report