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Solar flare forecasting based on a Fusion Model

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Earth and Planetary Physics 2025年第1期9卷 171-181页

作者： YiYang Li ShiYong Huang SiBo Xu ZhiGang Yuan Kui Jiang QiYang Xiong RenTong lin School of Earth and Space Science Technology Hubei Luojia LaboratoryWuhan UniversityWuhan 430072China

Solar flare prediction is an important subject in the field of space *** learning technology has greatly promoted the development of this *** this study,we propose a novel solar flare forecasting model integrating Deep Residual Network(ResNet)and Support Vector Machine(SVM)for both≥C-class(C,M,and X classes)and≥M-class(M and X classes)*** collected samples of magnetograms from May 1,2010 to September 13,2018 from Space-weather Helioseismic and Magnetic Imager(HMI)Active Region Patches and then used a cross-validation method to obtain seven independent data *** then utilized five metrics to evaluate our fusion model,based on intermediate-output extracted by ResNet and SVM using the Gaussian kernel *** results show that the primary metric true skill statistics(TSS)achieves a value of 0.708±0.027 for≥C-class prediction,and of 0.758±0.042 for≥M-class prediction;these values indicate that our approach performs significantly better than those of previous *** metrics of our fusion model’s performance on the seven datasets indicate that the model is quite stable and robust,suggesting that fusion models that integrate an excellent baseline network with SVM can achieve improved performance in solar flare ***,we also discuss the performance impact of architectural innovation in our fusion model.

关键词： solar flare pace weather deep learning Fusion Model

NFXL1 functions as a transcriptional activator required for thermotolerance at reproductive stage in Arabidopsis

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Journal of Integrative Plant Biology 2024年第1期66卷 54-65页

作者： Qiao‐yun Zhu lin‐lin Zhang Jian‐Xiang Liu State Key Laboratory of Plant Environmental Resilience College of Life SciencesZhejiang UniversityHangzhou 310027China

Plants are highly susceptible to abiotic stresses,particularly heat stress during the reproductive ***,the specific molecular mechanisms underlying this sensitivity remain largely *** the current study,we demonstrate that the Nuclear Transcription Factor,X-box Binding Protein 1-Like 1(NFXL1),directly regulates the expression of DEHYDRATION-RESPONSIVE ELEMENT-BINDING PROTEIN 2A(DREB2A),which is crucial for reproductive thermotolerance in ***1 is upregulated by heat stress,and its mutation leads to a reduction in silique length(seed number)under heat stress ***-Seq analysis reveals that NFXL1 has a global impact on the expression of heat stress responsive genes,including DREB2A,Heat Shock Factor A3(HSFA3)and Heat Shock Protein 17.6(HSP17.6)in flower ***,NFXL1 is enriched in the promoter region of DREB2A,but not of either HSFA3 or *** experiments using electrophoretic mobility shift assay have confirmed that NFXL1 directly binds to the DNA fragment derived from the DREB2A ***,effector-reporter assays have shown that NFXL1 activates the DREB2A *** DREB2A mutants are also heat stress sensitive at the reproductive stage,and DEREB2A is epistatic to NFXL1 in regulating thermotolerance in flower *** is known that HSFA3,a direct target of DREB2A,regulates the expression of heat shock proteins genes under heat stress ***,our findings establish NFXL1 as a critical upstream regulator of DREB2A in the transcriptional cassette responsible for heat stress responses required for reproductive thermotolerance in Arabidopsis.

关键词： Arabidopsis DREB2A heat stress NFXL1 reproductive thermotolerance

脑卒中后上肢运动功能与注意力的相关性:一项多中心横断面研究

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中国全科医学 2025年第2期28卷 208-213页

作者：林嘉莉张舒阳林嘉滢周钰馨赵月华陈云贾杰福建医科大学附属第一医院康复医学科福建省福州市350005 复旦大学附属华山医院康复医学科上海市200040 上海市静安区中心医院复旦大学附属华山医院静安分院康复科 200040 福建医科大学附属第一医院(滨海院区)国家区域医疗中心福建省福州市350200 国家老年疾病临床医学研究中心(华山) 上海市200040

背景上肢运动功能障碍是脑卒中后常见的功能障碍,注意力可能对上肢运动功能的恢复有影响,但目前上肢运动功能与注意力的相关性研究证据较少。目的探索脑卒中后上肢运动功能与注意力的相关性,为临床解决上肢功能康复问题提供新的思考角... 详细信息

背景上肢运动功能障碍是脑卒中后常见的功能障碍,注意力可能对上肢运动功能的恢复有影响,但目前上肢运动功能与注意力的相关性研究证据较少。目的探索脑卒中后上肢运动功能与注意力的相关性,为临床解决上肢功能康复问题提供新的思考角度。方法选取2023年3—10月在全国26家单位康复医学科住院的脑卒中患者480例为研究对象。采用Fugl-Meyer上肢运动功能评分(FMA-UL)和蒙特利尔认知评估量表(MoCA)分别评估患者上肢运动功能和注意力,采用Pearson相关性分析探究FMA-UL总分与MoCA中注意力评估项目得分的相关性。结果480例患者中有105例没有完成完整的评估,最终纳入脑卒中患者375例;平均FMA-UL总分(31.26±22.49)分;平均MoCA-注意力部分总分(4.74±1.60)分;平均注意-数字顺背/倒背任务得分(1.62±0.63)分;平均注意-读到1敲一下桌面任务得分(0.74±0.45)分;注意-100连续减7任务得分(2.39±0.95)分。男性患者FMA-UL总分高于女性(P<0.05)。全部患者的FMA-UL总分与MoCA-注意力部分总分、注意-数字顺背/倒背任务得分、注意-读到1敲一下桌面任务得分、注意-100连续减7任务得分均呈正相关(r值分别为0.226、0.146、0.195、0.182,P<0.05);男性患者的FMA-UL总分与MoCA-注意力部分总分、注意-数字顺背/倒背任务得分、注意-读到1敲一下桌面任务得分、注意-100连续减7任务得分均呈正相关(r值分别为0.236、0.128、0.213、0.197,P<0.05)。结论脑卒中后上肢运动功能与注意力具有相关性且呈正相关,其中持续性注意力与上肢运动功能的相关程度较高,注意力的广度与上肢运动功能的相关程度较低。按照性别分组后,男性患者的上肢运动功能与注意力相关性同上,而女性患者的上肢运动功能与注意力相关性不显著,性别可能对上肢运动功能和注意力的相关性存在影响。

关键词：脑卒中上肢运动功能注意力相关性分析

Dynamic simulation and optimal control strategy for a parallel hybrid hydraulic excavator

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第5期9卷 624-632页

作者： Xiao lin Shuang-xia PAN Dong-yun WAN State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

The primary focus of this study is to investigate the control strategies of a hybrid system used in hydraulic excavators. First, the structure and evaluation target of hybrid hydraulic excavators are analyzed. Then the dynamic system model including batteries, motor and engine is built as the simulation environment to obtain control results. A so-called multi-work-point dynamic control strategy, which has both closed-loop speed PI (proportion integral) control and direct torque control, is proposed and studied in the simulation model. Simulation results indicate that the hybrid system with this strategy can meet the power demand and achieve better system stability and higher fuel efficiency.

关键词： Hybrid system Hydraulic excavator Multi-work-point dynamic control Direct torque control

A Parallel Processing and Synthesis Structure for Improving Access Security and Efficiency in SDN Environment

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Chinese Journal of Electronics 2016年第5期25卷 817-823页

作者： ZHANG Peng CHEN Xiangning GE yun JIN lin School of Electronic Science and Engineering Nanjing University The Fourteenth Research Institute of China Electronics Technology Group Corporation

After studying the routing and forwarding process of network stream and the implementation of SDN,we propose a retractable management model for flow table.A structure with parallel tables and synthesis processing is proposed according to the feature of SDN and traditional network. The parallel tables share the same storage resources. Thanks to the separation of data plane and control plane, control plane owns more computing resources than traditional device. It evaluates the role of nodes and the action of network flows, makes adjustment according to the historical and current information and streamlines flow tables by consolidating and simplifying old flow *** simulation, it is proved that the realized method can defend offensive traffic while ensuring the safety of accessing and forwarding, especially existing blocking attack.

关键词： Access network Software-defined networking Flow table Parallel Synthesis Security and efficiency

Three-Dimensional Climatological Structures of the Arabian Sea Eddies and Eddy-Induced Flux

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Journal of Ocean University of China 2023年第4期22卷 874-885页

作者： lin Xinyu QIU yun NI Xutao lin Wenshu AUNG Cherry Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQingdao 266061China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Fujian Provincial Key Laboratory of Marine Physical and Geological Processes Xiamen 361005China Marine Science Department Myeik UniversityTanintharyi 14052Myanmar

This study explores the spatial structure and transport characteristics of eddies in the Arabian Sea(AS)using Argo profiles and satellite *** majority of eddies occur in the northern AS,especially along its northeastern *** contrast,the western AS had a relatively higher eddy kinetic energy compared to the eastern ***,the strongest energetic eddies were present in the Somali Current *** composite results revealed the evident thermohaline anomalies caused by cyclonic eddies(CEs)and anticyclonic eddies(AEs)in the upper 300m *** anomalous temperature structure within CEs and AEs showed a dominant dipole structure in the near-surface layer and a monopole structure below,with maximum temperature anomalies of approximately−0.8℃and+1.0℃located at depths of 100–150m,*** composited salinity structures for CEs and AEs exhibited monopole vertical structures and sandwich-like *** AEs,large positive salinity anomalies occurred at subsurface layers of 60–180 m with a peak value of about 0.07,and weak negative values were observed above 60m and below 180 m.A similar vertical structure but with an opposite sign operates for *** composited CE and AE caused an equatorward salt flux with values of−8.1×10^(4)and−2.2×10^(4)kg s^(−1),*** caused an equatorward heat flux of−7.7×10^(11)W,and AEs induced a poleward flux of 1.5×1011 W.

关键词： Arabian Sea mesoscale eddy thermohaline structure heat and salt flux

Pedestrian detection algorithm based on video sequences and laser point cloud

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Frontiers of Computer Science 2015年第3期9卷 402-414页

作者： Hui LI yun LIU Shengwu XIONG lin WANG School of Information Science and Technology Qingdao University of Science and Technology Qingdao 266061 China School of Computer Science Wuhan University of Technology Wuhan 430070 China

Pedestrian detection is a critical problem in the field of computer vision. Although most existing algorithms are able to detect pedestrians well in controlled environ- ments, it is often difficult to achieve accurate pedestrian de- tection from video sequences alone, especially in pedestrian- intensive scenes wherein pedestrians may cause mutual oc- clusion and thus incomplete detection. To surmount these dif- ficulties, this paper presents pedestrian detection algorithm based on video sequences and laser point cloud. First, laser point cloud is interpreted and classified to separate pedes- trian data and vehicle data. Then a fusion of video image data and laser point cloud data is achieved by calibration. The re- gion of interest after fusion is determined using feature in- formation contained in video image and three-dimensional information of laser point cloud to remove false detection of pedestrian and thus to achieve pedestrian detection in inten- sive scenes. Experimental verification and analysis in video sequences demonstrate that fusion of two data improves the performance of pedestrian detection and has better detection results.

关键词： computer vision pedestrian detection video se-quences laser point cloud

Synthesis,Crystal Structure and Fluorescent Properties of 1-(4-(Dimethylamino)benzylidene)-4-(naphthalen-1-yl) Thiosemicarbazide

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Chinese Journal of Structural Chemistry 2006年第10期25卷 1197-1202页

作者： YU yun lin Li-Rong HUANG Rong-Bin Department of Chemistry Longyan College Longyan Fujian 364000 China Department of Chemistry Xiamen University Xiamen 361005 China

The title compound, 1-4-（dimethylamino）benzylidene）-4-（naphthalene-1-yl） thiosemicarbazide （DMABNTS, C20H20N4S, Mr = 348.47）, was synthesized and characterized by elemental analysis, 1R, ^1H NMR and MS. The crystal structure of DMABNTS with 1,4-dioxane （Diox, C4H8O2） solvent molecules （DMABNTS·2Diox, C28H36N4O4S, Mr = 524.67） was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic system, space group P21/c with a = 14.418（4）, b = 7.1702（19）, c = 28.350（7）°A,β= 101.154（6）°, V= 2875.4（13） °A^3, Z= 4, Dc= 1.212 g/cm^3, F（000） = 1120 and μ= 0.151 mm^-1. A total of 6458 reflections were collected, of which 4671 were unique. The structure was solved by direct methods and refined to the final R = 0.0732 and wR = 0.2127 for 3921 observed reflections （I〉 2σ（I））. There exist intermolecular hydrogen bonds （N（2）-H（2B）…S（1A）and N（1）-H（1A）…O（4B）） in the structure. The study of fluorescent properties ＇shows that DMABNTS emits bright solid-state fluorescence in the visible region and exhibits blue photoluminescence.

关键词： 1-(4-(dimethylamino)benzylidene)-4-(naphthalen- 1-yl)thiosemicarbazide synthesis crystal structure fluorescence

Machining distortion prediction of aerospace monolithic components

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第5期10卷 661-668页

作者： yun-bo BI Qun-lin CHENG Hui-yue DONG Ying-lin KE State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China Shanghai Spaceflight Precision Machinery Research Institute Shanghai 201600 China

To predict the distortion of aerospace monolithic components, a model is established to simulate the numerical control (NC) milling process using 3D finite element method (FEM). In this model, the cutting layer is simplified firstly. Then, the models of cutting force and cutting temperature are established to gain the cutting loads, which are applied to the mesh model of the part. Finally, a prototype of machining simulation environment is developed to simulate the milling process of a spar. Key factors influencing the distortion, such as initial residual stress, cutting loads, fixture layout, cutting sequence, and tool path are considered all together. The total distortion of the spar is predicted and an experiment is conducted to validate the numerical results. It is found that the maximum discrepancy between the simulation results and experiment values is 19.0%

关键词： Monolithic component Machining distortion Finite element simulation