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Large-scale inverted-V channels of upflowing oxygen ions pumped by Alfvén waves

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Earth and Planetary Physics 2023年第6期7卷 640-654页

作者： Hui Zhang Jun Zhong SuiYan Fu ZuYin Pu Yong Wei lun xie LiBo Liu QiAn Chen Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China Heilongjiang Mohe National Observatory of Geophysics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Earth and Space Sciences Peking UniversityBeijing 100871China

Large-scale inverted-V channels of upflowing oxygen ions are frequently identified in data collected by Cluster,at all local times,near the open-closed field line boundary over Earth’s high-latitude ionosphere-occur with downward propagating MHD Alfvén waves which have cascaded into kinetic regimes of plasma.The transverse acceleration of the oxygen ions in the center of these structures is interpreted as the integrated energization by these waves along the channels.Also observed within the channels are upward parallel electric fields,a key characteristic of kinetic Alfvén waves,which may contribute not only to lifting the ions but also to precipitating aurora electrons that might initiate ion upflow in the ionosphere below.Statistics on five-year observations of Cluster show that the channels typically form during geomagnetic perturbations,particularly when solar-wind dynamic pressure is high or highly fluctuated.Near the open-closed field line boundary,the stronger the wave power,the higher the upward oxygen flux and the higher the beam energy,indicating that these waves provide a simple but efficient way to drive oxygen upflows.

关键词： oxygen ions dispersive Alfvén waves ion outflow parallel electric field

Empathizing with Emotional Robot Based on Cognition Reappraisal

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China Communications 2017年第9期14卷 100-113页

作者： Xin Liu lun xie Zhiliang Wang School of Computer and Communication Engineering University of Science and Technology Beijing

This paper proposes a continuous cognitive emotional regulation model for robot in the case of external emotional stimulus from interactive person's expressions. It integrates a guiding cognitive reappraisal strategy into the HMM(Hidden Markov Model) emotional interactive model for empathizing between robot and person. The emotion is considered as a source in the 3D space(Arousal, Valence, and Stance). State transition and emotion intensity can be quantitatively analyzed in the continuous space. This cognition-emotion interactive model have been verified by the expression and behavior robot. Empathizing is the main distinguishing feature of our work, and it is realized by the emotional regulation which operated in a continuous 3D emotional space enabling a wide range of intermediate emotions. The experiment results provide evidence with acceptability, accuracy, richness, fluency, interestingness, friendliness and exaggeration that the robot with cognition and emotional control ability could be better accepted in the human-robot interaction(HRI).

关键词： emotional robot human-robot in-teraction guiding cognitive reappraisal emo-tional regulation active field emotion space

Non-storm erosion of MeV electron outer radiation belt down to L^(*)<4.0 associated with successive enhancements of solar wind density

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Earth and Planetary Physics 2021年第6期5卷 581-591页

作者： Ying Xiong lun xie SuiYan Fu BinBin Ni ZuYin Pu School of Earth and Space Science Peking UniversityBeijing 100871China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China

We report an unusual non-storm erosion event of outer zone MeV electron distribution during three successive solar wind number density enhancements(SWDEs)on November 27-30,2015.Loss of MeV electrons and energy-dependent narrowing of electron pitch angle distributions(PAD)first developed at L^(*)=5.5 and then moved down to L^(*)4 during SWDE1 are mainly due to outward radial diffusion.However during SWDE2&3,scattering loss due to EMIC waves is dominant at 4

关键词： solar wind density enhancement outer radiation belt MeV electrons outward radial diffusion EMIC wave scattering loss

Multi-spacecraft observations of ULF waves during the recovery phase of magnetic storm on October 30, 2003

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Science China(Technological Sciences) 2008年第10期51卷 1772-1785页

作者： YongFu Wang SuiYan Fu QiuGang Zong Biao Yang ZuYin Pu lun xie XuZhi Zhou Institute of Space Physics and Applied Technology Peking University Beijing 100871 China Center for Atmospheric Research University of Massachusetts Lowell Lowell MA 01854-3629 USA

Based on observations obtained by Cluster C1, GOES 10, 12, and Polar, the global ULF wave properties are studied during the recovery phase of a very intense magnetic storm-Halloween storm (October 31, 2003, 21:00-23:00 UT). The results indicate that the ULF waves’ properties observed by different satellites, such as amplitude, period, etc. show large variations. This can be interpreted as that Field Line Resonance (FLR) might take place in the region where Cluster C1 passed. The compressional wave of the cavity mode coupled with FLR’s shear Alfven wave and fed energy to the latter, forming a large-amplitude toroidal mode. From the point of period, Cluster C1 observed the shortest period, GOES 10, 12 observed the middle, while Polar observed the longest. The wave period of toroidal mode observed by Cluster C1 kept almost unchanging when Cluster C1 passed L range from 11.7 to 5.3. Using the Squared Wavelet Coherence analysis method, we estimated that the FLR region in the dayside magnetosphere could expand to at least 4 local time widths. The toroidal mode observed by Polar was a standing wave, while the pol-oidal mode was a propagating wave, the observation results could be well ex-plained by the waveguide mode theory. Since the solarwind speed Vx was -800 km/s and the dynamic pressure varied little, we speculated that the source of the ULF wave was the Kelvin-Helmholtz instability at the magnetopause triggered by high speed solarwind.

关键词： magnetic storm ULF wave poloidal mode toroidal mode compressional mode cavity mode Field Line Resonance (FLR)

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半夏泻心汤治疗脾胃虚弱型胃溃疡患者的疗效

中国药物经济学 2024年第3期19卷 76-79页

作者：谢鉨伦枣阳市中医医院名医堂湖北襄阳441200

目的探讨半夏泻心汤治疗脾胃虚弱型胃溃疡患者的疗效。方法选取2020年1月至2023年1月于枣阳市中医医院治疗的118例脾胃虚弱型胃溃疡患者作为研究对象,按随机数字表法分为对照组与观察组,每组59例。对照组给予常规西药治疗,观察组采用半... 详细信息

目的探讨半夏泻心汤治疗脾胃虚弱型胃溃疡患者的疗效。方法选取2020年1月至2023年1月于枣阳市中医医院治疗的118例脾胃虚弱型胃溃疡患者作为研究对象,按随机数字表法分为对照组与观察组,每组59例。对照组给予常规西药治疗,观察组采用半夏泻心汤治疗,比较两组的治疗效果。结果观察组治疗有效率高于对照组,差异有统计学意义(P<0.05);治疗后观察组胃脘隐痛、喜按喜暖、纳差、食后胀闷、乏力及大便溏稀评分低于对照组(P<0.05);治疗后观察组白细胞介素6(IL6)、超敏C反应蛋白(hs-CRP)、肿瘤坏死因子-α(TNF-α)水平低于对照组(P<0.05);治疗后观察组胃泌素(GAS)、血管活性肠肽(VIP)、胃动素(MOT)水平高于对照组(P<0.05);观察组不良反应发生率低于对照组(P<0.05)。结论采用半夏泻心汤治疗脾胃虚弱型胃溃疡疗效确切,能有效改善中医证候积分,缓解炎症,使患者胃肠激素水平得以上升,降低不良反应发生率,安全性较高。

关键词：半夏泻心汤脾胃虚弱型胃溃疡疗效

Review of micro-expression spotting and recognition in video sequences

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Virtual Reality & Intelligent Hardware 2021年第1期3卷 1-17页

作者： Hang PAN lun xie Zhiliang WANG Bin LIU Minghao YANG Jianhua TAO School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China

Facial micro-expressions are short and imperceptible expressions that involuntarily reveal the true emotions that a person may be attempting to suppress,hide,disguise,or conceal.Such expressions can reflect a person's real emotions and have a wide range of application in public safety and clinical diagnosis.The analysis of facial micro-expressions in video sequences through computer vision is still relatively recent.In this research,a comprehensive review on the topic of spotting and recognition used in micro expression analysis databases and methods,is conducted,and advanced technologies in this area are summarized.In addition,we discuss challenges that remain unresolved alongside future work to be completed in the field of micro-expression analysis.

关键词： Facial expression Micro-expression spotting Micro-expression recognition Database Review

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基于多维间注意力机制的水稻病害识别模型

江苏农业学报 2024年第4期40卷 625-635页

作者：王忠培谢成军董伟管博伦安徽省农业科学院农业经济与信息研究所安徽合肥230001 中国科学院合肥智能机械研究所安徽合肥230031

水稻病害的快速、准确识别是水稻病害防治的前提,也是提高水稻产量和品质的有效途径之一。为了提高水稻病害识别的准确率,本研究提出一种多维间的三维注意力水稻病害识别模型Inter_3DRiceNet网络模型,通过3个不同维度(通道维度、高度维... 详细信息

水稻病害的快速、准确识别是水稻病害防治的前提,也是提高水稻产量和品质的有效途径之一。为了提高水稻病害识别的准确率,本研究提出一种多维间的三维注意力水稻病害识别模型Inter_3DRiceNet网络模型,通过3个不同维度(通道维度、高度维度以及宽度维度)提取水稻病害特征信息。通道维度主要构建基于通道关系的三维立体注意力机制,通过建立一维的通道间关系注意力机制再结合二维空间关系,最终获得基于通道关系的三维注意力特征信息。高度维度建立的是基于高度维度关系的三维注意力机制,而宽度维度建立的是基于宽度维度关系的立体注意力机制。然后将以上3个不同维度的注意力信息进行简单的相加再取平均值作为最终的病害提取特征。通过这种方式,不仅可以获取输入图像更丰富的特征,而且可以获得不同维度的立体空间关系。试验结果表明,在自建的6种真实自然环境水稻病害数据集中,本研究提出的Inter_3DRiceNet网络模型在测试集取得了98.32%的最高准确率,高于经典网络模型ResNet34、ResNet50、MobileNetV2、DenseNet、EfficientNet_B0和通道注意力机制模型SENet和GCT。可见本研究方法有效提高了水稻病害的识别准确率,获得了优于经典网络模型和通道注意力模型的识别准确率,有助于提升自然环境下对常见水稻病害的识别性能。

关键词：水稻病害三维注意力多维间关系注意力机制识别

不同角度注入肺表面活性物质对早产儿支气管肺发育不良和颅内出血的影响:一项前瞻性随机对照研究

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中国当代儿科杂志 2024年第4期26卷 337-342页

作者：戴雪凤朱昂昂谢婷婷熊玉红孟伦陈名武安徽医科大学附属省立医院新生儿科安徽合肥230001 南京鼓楼医院儿科江苏南京210008 中国科学技术大学附属第一医院新生儿科安徽合肥230001

目的不同角度注入肺表面活性物质对早产儿支气管肺发育不良和颅内出血发生的影响。方法前瞻性纳入2019年1月—2023年5月就诊于安徽医科大学附属省立医院新生儿科的146例早产儿(胎龄<32周)为研究对象。随机分为不同角度注入肺表面活性物... 详细信息

目的不同角度注入肺表面活性物质对早产儿支气管肺发育不良和颅内出血发生的影响。方法前瞻性纳入2019年1月—2023年5月就诊于安徽医科大学附属省立医院新生儿科的146例早产儿(胎龄<32周)为研究对象。随机分为不同角度注入肺表面活性物质组,即0°组(34例)、30°组(36例)、45°组(38例)、60°组(38例),分析比较各组临床指标和结局的差异。结果60°组给药后的氧合指数低于其他3组,使用有创呼吸机时间、用氧时间短于其他3组,支气管肺发育不良发生率低于其他3组(P<0.05)。60°组颅内出血发生率低于0°组(P<0.05)。60°组治愈率高于0°组和30°组(P<0.05)。结论60°角注入肺表面活性物质的临床疗效高于其他角度,且能降低早产儿颅内出血和支气管肺发育不良的发生率。

关键词：肺表面活性物质支气管肺发育不良颅内出血角度疗效早产儿

Evolution of clustered magnetic nulls in a turbulent-like reconnection region in the magnetotail

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Science Bulletin 2016年第14期61卷 1145-1150页

作者： Ruilong Guo Zuyin Pu Suiyan Fu lun xie Malcolm Dunlop Yulia V. Bogdanova Jiansen He Xin Wang Zhonghua Yao School of Earth and Space Sciences Peking UniversityBeijing 100871 China PKU/UCLA Joint Research Institute in Science and Engineering Peking University Beijing 100871 China School of Astronautics Beihang University Beijing 100191China RAL Space Rutherford Appleton Laboratory STFCDidcot OXll 0QX UK UCL Mullard Space Science Laboratory Dorking RH5 6NT UK

Magnetic null points and flux ropes play important roles in the three-dimensional process of magnetic reconnection. In this study, a cluster of null points are reconstructed in the reconnection region in the magnetotail by applying a fitting-reconstruction method to measurements from the Cluster mission. The number of reconstructed null points varies rapidly, presenting a turbulentlike evolution of the magnetic structure. The electron density and the flux of the accelerated electrons were enhanced in this turbulent-like region. During this unstable reconnection process, a B–As–B null structure was formed, showing flux rope features and resembling a secondary island in the observation.

关键词：磁重联零点演变结构演化电子密度不稳定磁通