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Machine Intelligence Research 2024年第1期21卷 89-103页

作者： chaojie wu Mingyang Li Ying Gao Xinyan Xie Wing W.Y.Ng Ahmad Musyafa School of Computer Science and Engineering South China University of TechnologyGuangzhou 511442China Guangdong Provincial Key Laboratory of Artificial Intelligence in Medical Image Analysis and Application Guangdong Provincial People's HospitalGuangzhou 510180China

The problem of art forgery and infringement is becoming increasingly prominent,since diverse self-media contents with all kinds of art pieces are released on the Internet every day.For art paintings,object detection and localization provide an efficient and ef-fective means of art authentication and copyright protection.However,the acquisition of a precise detector requires large amounts of ex-pensive pixel-level annotations.To alleviate this,we propose a novel weakly supervised object localization(WSOL)with background su-perposition erasing(BSE),which recognizes objects with inexpensive image-level labels.First,integrated adversarial erasing(IAE)for vanilla convolutional neural network(CNN)dropouts the most discriminative region by leveraging high-level semantic information.Second,a background suppression module(BSM)limits the activation area of the IAE to the object region through a self-guidance mechanism.Finally,in the inference phase,we utilize the refined importance map(RIM)of middle features to obtain class-agnostic loc-alization results.Extensive experiments are conducted on paintings,CUB-200-2011 and ILSVRC to validate the effectiveness of our BSE.

关键词： Weakly supervised object localization erasing method deep learning computer vision art authentication and copyright protection

Low-temperature-pyrolysis preparation of nanostructured graphite towards rapid potassium storage with high initial Coulombic efficiency

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Nano Research 2024年第6期17卷 5138-5147页

作者： Jingke Ren Boyu Xing Wen Luo Binyang Luo Xinfei wu Xin Yan Wencong Feng Feiyue Wang chaojie Cheng Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China

Industrially prepared artificial graphite(AG)is attractive for potassium-ion batteries(PIBs),but its rate performance is poor and the production process is energy intensive,so developing an efficient strategy to produce novel graphite with low energy consumption and high performance is economically important.Herein,a nanostructured graphite composed of multi-walled carbon nanotubes(MWCNTs)and graphite shells was prepared by one-pot method through low-temperature pyrolysis of iron-based metal-organic framework(MOF)and carbon source.The high graphitization degree of nanostructured graphite makes the initial Coulombic efficiency(ICE)exceed 80%,and the three-dimensional(3D)conductive network ensures a specific capacity of 234 mAh·g^(−1)after 1000 cycles at a high current density of 500 mA·g^(−1).In addition,the typical graphite potassium storage mechanism is also demonstrated by in situ X-ray diffraction(XRD)and in situ Raman spectroscopy,and its practicality is also proved by the voltage of the full cells.This work provides a feasible way to optimize the practical production process of AG and expand its application in energy storage.

关键词： graphite anode potassium-ion batteries high graphitization degree low-temperature pyrolysis initial Coulombic efficiency

Methionine oxidation and reduction of the ethylene signaling component MaEIL9 are involved in banana fruit ripening

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Journal of Integrative Plant Biology 2023年第1期65卷 150-166页

作者： Lisha Zhu Lin Chen chaojie wu Wei Shan Danling Cai Zengxiang Lin Wei Wei Jianye Chen Wangjin Lu Jianfei Kuang State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation Ministry of EducationCollege of Horticulture South China Agricultural UniversityGuangzhou 510642 China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(South China) Ministry of Agriculture and Rural AffairsCollege of Horticulture South China Agricultural UniversityGuangzhou 510642 China

The ethylene insensitive 3/ethylene insensitive3-like(EIN3/EIL)plays an indispensable role in fruit ripening.However,the regulatory mechanism that links post-translational modification of EIN3/EIL to fruit ripening is largely unknown.Here,we studied the expression of 13 MaE IL genes during banana fruit ripening,among which MaE IL9 displayed higher enhancement particularly in the ripening stage.Consistent with its transcript pattern,abundance of MaE IL9 protein gradually increased during the ripening process,with maximal enhancement in the ripening.DNA affinity purification(DAP)-seq analysis revealed that MaE IL9 directly targets a subset of genes related to fruit ripening,such as the starch hydrolytic genes MaA MY3D and MaB AM1.Stably overexpressing MaE IL9 in tomato fruit hastened fruit ripening,whereas transiently silencing this gene in banana fruit retarded the ripening process,supporting a positive role of MaEIL9 in fruit ripening.Moreover,oxidation of methionines(Met-129,Met-130,and Met-282)in MaEIL9 resulted in the loss of its DNA-binding capacity and transcriptional activation activity.Importantly,we identified MaEIL9 as a potential substrate protein of methionine sulfoxide reductase A MaMsrA4,and oxidation of Met-129,Met-130,and Met-282in MaEIL9 could be restored by MaMsrA4.Collectively,our findings reveal a novel regulatory network controlling banana fruit ripening,which involves MaMsrA4-mediated redox regulation of the ethylene signaling component MaEIL9.

关键词： banana EIN3/EIL redox regulation ROS starch degradation

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PBO纤维表面改性处理的研究进展

表面技术 2024年第1期53卷 48-55页

作者：杨超杰吴喜娜魏浩王国军哈尔滨工程大学青岛创新发展基地山东青岛266000

聚对苯撑苯并二噁唑(PBO)纤维因其比强度高、比模量高、耐热性好、阻燃性好以及优异的介电性能,现已在安全防护、建筑汽车等领域得到广泛应用。由于PBO纤维表面光滑、化学惰性,导致其与基体树脂界面结合差,进一步影响复合材料的整体性能... 详细信息

聚对苯撑苯并二噁唑(PBO)纤维因其比强度高、比模量高、耐热性好、阻燃性好以及优异的介电性能,现已在安全防护、建筑汽车等领域得到广泛应用。由于PBO纤维表面光滑、化学惰性,导致其与基体树脂界面结合差,进一步影响复合材料的整体性能,这大大限制了PBO纤维优异综合性能的发挥,所以对PBO纤维表面进行改性处理显得尤为重要。介绍了近年来国内外针对PBO纤维不同表面改性方法及对应复合材料性能改善程度的研究进展,从PBO纤维改性方法的分类入手,阐述了各种方法的基本原理。通过对这些处理方法的比较,阐述了国内PBO纤维表面改性的研究进展,指出了国内外在PBO纤维表面改性处理上的差距,为未来的发展方向提供了参考。PBO纤维表面改性方法包括化学刻蚀法、等离子体处理、表面涂层法、化学接枝法、紫外刻蚀法、上浆剂处理等。各种改性技术各有利弊,在选择改性方法时,理应考虑达到工艺快捷有效、经济环保和无损纤维性能等指标。未来,在PBO纤维表面改性的处理方法领域,将逐步向绿色环保的上浆剂处理方向发展。

关键词：聚对苯撑苯并二噁唑纤维表面改性界面复合材料

Mitogen-activated protein kinase 14-mediated phosphorylation of MaMYB4 negatively regulates banana fruit ripening

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Horticulture Research 2023年第1期10卷 220-231页

作者： Yingying Yang chaojie wu Wei Shan Wei Wei Yating Zhao Jianfei Kuang Jianye Chen Yueming Jiang Wangjin Lu State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation Ministry of EducationCollege of HorticultureSouth China Agricultural UniversityGuangzhou 510642China South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China

Mitogen-activated protein kinase(MAPK/MPK)cascades play crucial parts in plant growth,development processes,immune ability,and stress responses;however,the regulatory mechanism by which MAPK affects fruit ripening remains largely unexplored.Here,we reported that MaMPK14 cooperated with MaMYB4 to mediate postharvest banana fruit ripening.Transient overexpression of individual MaMPK14 and MaMYB4 in banana fruit delayed fruit ripening,confirming the negative roles in the ripening.The ripening negative regulator MaMYB4 could repress the transcription of genes associated with ethylene biosynthesis and fruit softening,such as MaACS1,MaXTH5,MaPG3,and MaEXPA15.Furthermore,MaMPK14 phosphorylated MaMYB4 at Ser160 via a direct interaction.Mutation at Ser160 of MaMYB4 reduced its interaction with MaMPK14 but did not affect its subcellular localization.Importantly,phosphorylation of MaMYB4 by MaMPK14 enhanced the MaMYB4-mediated transcriptional inhibition,binding strength,protein stability,and the repression of fruit ripening.Taken together,our results delineated the regulation pathway of MAPK module during banana fruit ripening,which involved the phosphorylation modification of MaMYB4 mediated by MaMPK14.

关键词： interaction. fir banana

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隧道复杂环境下沥青薄层罩面抗滑耐久性研究

森林工程 2024年第2期40卷 188-197页

作者：吴寅邱彬闫朝杰李强安徽省交通控股集团有限公司六安西高速公路管理中心安徽六安237005 南京林业大学土木工程学院南京210037

为研究沥青薄层罩面在高速公路隧道复杂环境下的抗滑耐久性,分别制备高韧热拌薄层罩面(罩面A)、温拌沥青薄层罩面(罩面B)、高和易性薄层罩面(罩面C)与AC-13沥青混合料,在常规环境与模拟隧道复杂环境下进行轮碾磨耗试验。研究不同罩面类... 详细信息

为研究沥青薄层罩面在高速公路隧道复杂环境下的抗滑耐久性,分别制备高韧热拌薄层罩面(罩面A)、温拌沥青薄层罩面(罩面B)、高和易性薄层罩面(罩面C)与AC-13沥青混合料,在常规环境与模拟隧道复杂环境下进行轮碾磨耗试验。研究不同罩面类型、不同环境下磨耗次数对薄层罩面抗滑性能的影响。采用摆值初值变化、摆值衰减速率与指数预测模型评价不同罩面在常规环境与隧道环境下的对应抗滑衰变规律。试验结果表明,罩面A在隧道环境下摆值初值衰减最低,相较于罩面B减少15.2%、较罩面C减少28.4%、较AC-13沥青混合料减少33%。且其摆值衰减速率仅为0.292,较罩面B低36%,较罩面C低20.2%,较AC-13低29.4%,在隧道环境下表现出优异的抗滑耐久性。此外,AC-13、罩面B与罩面C在隧道环境下的磨耗中会出现“临时纹理”与油蚀现象,造成抗滑性能衰减的短暂延缓。

关键词：薄层罩面隧道环境模拟轮碾磨耗试验抗滑性能摆值衰变规律

BI@ZIF-8/EP涂层的制备及在深海压力下的防护性能研究

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表面技术 2024年第8期53卷 93-106页

作者：景超杰郭辉赵方超吴德权陈雪晴刘杰西南技术工程研究所国防科技工业自然环境试验研究中心重庆400039 烟台大学化学化工学院山东烟台264005 中国航空综合技术研究所北京100028

目的制备负载苯并咪唑(BI)的BI@ZIF-8粒子,研究BI@ZIF-8/EP涂层在2种静水压力下的失效行为。方法制备并表征BI@ZIF-8粒子。制备BI@ZIF-8/EP涂层,在常压(0.1 MPa)和模拟深海压力(6 MPa)开展浸泡实验。通过微观形貌、失光率、色差、附着... 详细信息

目的制备负载苯并咪唑(BI)的BI@ZIF-8粒子,研究BI@ZIF-8/EP涂层在2种静水压力下的失效行为。方法制备并表征BI@ZIF-8粒子。制备BI@ZIF-8/EP涂层,在常压(0.1 MPa)和模拟深海压力(6 MPa)开展浸泡实验。通过微观形貌、失光率、色差、附着力、红外光谱、电化学阻抗谱等手段进行涂层失效行为对比分析。结果成功制备了BI@ZIF-8粒子;在相同压力条件下,BI@ZIF-8/EP涂层具有更高的附着力和阻抗值;同种涂层在6 MPa下退化更加严重,附着力和阻抗值下降速率增大;随着浸泡时间的延长,6 MPa下BI@ZIF-8/EP涂层中的BI特征峰强度明显减弱,2种涂层的主要特征峰强度均有下降。结论ZIF-8粒子中的咪唑基,能增加环氧涂层交联密度,降低侵蚀性粒子渗透速率;高静水压能显著加速侵蚀性粒子向涂层内部的扩散,并加速有机涂层失效进程;BI分子和2-Melm分子中N原子的孤电子对与Fe原子的空轨道能在金属基体表面形成吸附膜,并且Zn^(2+)和OH^(−)能在金属基体表面形成沉积膜,有效减缓了金属腐蚀。此外,2种涂层的退化机制不受静水压力升高的影响。

关键词：静水压力模拟深海压力失效进程红外光谱电化学阻抗谱吸附膜

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谷物胚芽稳定化技术和功能性应用研究进展

农产品加工 2024年第2期 96-100页

作者：欧朝接吴琼婧广西大学轻工与食品工程学院广西南宁530004 广西壮族自治区分析测试研究中心广西南宁530022

谷物胚芽含有大量的营养物质,被誉为“天赐营养源”,产品的功能性开发潜力巨大。综述国内外谷物胚芽稳定化技术,比较了不同技术的稳定化效果及优缺点,然后对谷物胚芽在食品、药品、保健品、化妆品、饲料、工业等行业的应用进行简要概述... 详细信息

谷物胚芽含有大量的营养物质,被誉为“天赐营养源”,产品的功能性开发潜力巨大。综述国内外谷物胚芽稳定化技术,比较了不同技术的稳定化效果及优缺点,然后对谷物胚芽在食品、药品、保健品、化妆品、饲料、工业等行业的应用进行简要概述,分析了谷物胚芽资源开发利用存在的问题和应用前景。

关键词：谷物胚芽稳定化应用功能性研究进展

基于局部均值分解和归一化最小均方的宽频振荡检测方法

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电力系统及其自动化学报 2024年第3期36卷 48-58页

作者：吴为曾德辉聂欣昊卢家俊李超杰南方电网科学研究院广州510080 广州嘉缘电力科技有限公司广州510610

为精确采集和分析电力系统宽频振荡信号,提出基于改进局部均值分解与归一化最小均方算法相结合的宽频振荡检测新方法。首先利用归一化最小均方算法对宽频振荡信号进行降噪处理,进而采用改进局部均值分解算法提取该降噪信号的乘积函数;... 详细信息

为精确采集和分析电力系统宽频振荡信号,提出基于改进局部均值分解与归一化最小均方算法相结合的宽频振荡检测新方法。首先利用归一化最小均方算法对宽频振荡信号进行降噪处理,进而采用改进局部均值分解算法提取该降噪信号的乘积函数;然后对上述乘积函数分量进行希尔伯特变换,求解信号瞬时频率的高频突变点,实现对振荡起止时刻的准确定位。仿真实验表明,本文所提方法能准确求解宽频振荡信号,且在强噪声下仍具有很高的精度。

关键词：强噪声干扰归一化最小均方局部均值分解宽频振荡希尔伯特变换

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基于大数据技术的电力系统调度优化分析

集成电路应用 2024年第5期41卷 106-107页

作者：魏超婕吴易静国网河北省电力有限公司元氏县供电分公司河北051130

阐述一种基于大数据分析的电力系统调度优化方法。通过收集并清洗大量的运营数据,运用机器学习算法进行分析,找出影响电力系统运行的关键因素。再基于这些因素,构建一个全新的优化模型。

关键词：大数据分析电力系统调度优化机器学习优化模型