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RFFsNet-SEI:a multidimensional balanced-RFFs deep neural network framework for specific emitter identification

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Journal of Systems Engineering and Electronics 2024年第3期35卷 558-574,F0002页

作者： fan rong SI Chengke HAN Yi WAN Qun School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Electronic and Electrical Engineering Civil Aviation Flight University of ChinaGuanghan 618307China

Existing specific emitter identification(SEI)methods based on hand-crafted features have drawbacks of losing feature information and involving multiple processing stages,which reduce the identification accuracy of emitters and complicate the procedures of *** this paper,we propose a deep SEI approach via multidimensional feature extraction for radio frequency fingerprints(RFFs),namely,***,we extract multidimensional physical RFFs from the received signal by virtue of variational mode decomposition(VMD)and Hilbert transform(HT).The physical RFFs and I-Q data are formed into the balanced-RFFs,which are then used to train *** introducing model-aided RFFs into neural network,the hybrid-driven scheme including physical features and I-Q data is *** improves physical interpretability of ***,since RFFsNet-SEI identifies individual of emitters from received raw data in end-to-end,it accelerates SEI implementation and simplifies procedures of ***,as the temporal features and spectral features of the received signal are both extracted by RFFsNet-SEI,identification accuracy is ***,we compare RFFsNet-SEI with the counterparts in terms of identification accuracy,computational complexity,and prediction *** results illustrate that the proposed method outperforms the counterparts on the basis of simulation dataset and real dataset collected in the anechoic chamber.

关键词： specific emitter identification(SEI) deep learning(DL) radio frequency fingerprint(RFF) multidimensional feature extraction(MFE) variational mode decomposition(VMD)

Hierarchical crystalline-amorphous nanocomposites with high strength and large deformability enabled by elemental diffusion

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Journal of Materials Science & Technology 2024年第4期171卷 150-161页

作者： Liqiang Wang Heyi Wang Xin Zhou Huangliu Fu James Utama Surjadi Shuo Qu Xu Song rong fan Yang Lu Department of Mechanical Engineering City University of Hong KongHong KongChina Nano-Manufacturing Laboratory(NML) Shenzhen Research Institute of City University of Hong KongShenzhen 518057China Chengdu Research Institute City University of Hong KongChengdu 610200China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong KongChina Department of Mechanical Engineering The University of Hong KongHong KongChina

Amorphous/nanocrystalline dual-phase structures have recently emerged as an effective way for over-coming the strength-ductility trade-offand breaking the limitation of the reverse Hall-Petch ***,we proposed a new strategy to develop a hierarchical and interconnected amorphous-crystalline nanocomposite arising from the nanoscale elemental interdiffusion and oxygen adsorption behavior dur-ing thermal treatment *** nanocomposite consisted of a three-dimensional(3D)hierarchical network structure where the crystalline phase(Cr-Co-Ni-Al)was embedded into the Al-O-based amor-phous phase network with critical feature sizes encompassing three orders of magnitude(from microm-eter to nanometer scale).It can achieve ultrahigh compression yield strength of-3.6 GPa with large homogeneous deformation of over 50%*** massive interstitial atoms induced lattice distortion and hierarchical amorphous phase boundary contributed to the strength *** situ Uniaxial compression inside a transmission electron microscope(TEM)revealed that the exceptional deformability of the nanocomposites resulted from the homogenous plastic flow of nano-sized amorphous phase and the plastic co-deformation behavior restricted by the nano-architected dual-phase *** proposed dual-phase synthesis approach can outperform conventional nanolaminates design strategies in terms of the mechanical properties achievable while providing a pathway to easily tune the microstructure of these nanolaminates.

关键词： Nanolaminates Dual-phase nanocomposites In situ transmission electron microscopy Multi-component alloy

Transcutaneous electrical acupoint stimulation benefits postoperative pain relief of oocyte retrieval:A randomized controlled trial

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Journal of Integrative Medicine 2024年第1期22卷 32-38页

作者： Li-ying Liu Yang Su rong-rong Wang Yuan-yuan Lai Lei Huang Yi-ting Li Xin-yue Tao Meng-hua Su Xiao-yan Zheng Shi-chen Huang Yong-na Wu Si-yi Yu fan-rong Liang Jie Yang Acupuncture and Tuina School Chengdu University of Traditional Chinese MedicineChengdu 610000Sichuan ProvinceChina Traditional Chinese Medicine Department Sichuan Jinxin Xi’nan Women's and Children's HospitalChengdu 610000Sichuan ProvinceChina

Background Transvaginal oocyte retrieval is frequently followed by adverse events related to anesthesia and the *** research showed that transcutaneous electrical acupoint stimulation(TEAS)can relieve intraoperative pain and postoperative *** This study examined whether TEAS can alleviate pain and relieve adverse symptoms after oocyte ***,setting,participants and interventions Altogether 128 patients were randomly divided into the TEAS group and the mock TEAS *** two groups received a 30-minute-long TEAS or mock TEAS treatment that began 30 min after oocyte *** outcome measures The primary outcome was the visual analog scale(VAS)pain *** outcomes were pressure pain threshold,McGill score,pain rating index(PRI),present pain intensity(PPI),VAS stress score,VAS anxiety score,and postoperative adverse *** The baseline characteristics of the two groups were comparable(P>0.05).The VAS pain scores of the TEAS group were lower than those of the mock TEAS group at 60 and 90 min after oocyte retrieval(P0.05).The TEAS group was superior to the mock TEAS group for relieving postoperative adverse symptoms(P<0.05).Conclusion TEAS treatment can relieve postoperative pain and postoperative adverse symptoms for patients undergoing oocyte retrieval.

关键词： Transcutaneous electrical acupoint stimulation Fertilization Embryo transfer Oocyte retrieval Pain Randomized controlled trial

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数字乡村建设的理论机制研究

西北农林科技大学学报（社会科学版） 2024年第1期24卷 71-79页

作者：樊荣太原理工大学马克思主义学院太原030024

新时代以数字技术助力乡村振兴是建设数字中国的重要内容。建设数字乡村是促进农业全面升级、农村全面进步和农民全面发展的关键一环。基于程序化扎根理论的研究思路,对26个数字乡村建设的典型案例进行三级编码,遵循“因果条件-脉络-中... 详细信息

新时代以数字技术助力乡村振兴是建设数字中国的重要内容。建设数字乡村是促进农业全面升级、农村全面进步和农民全面发展的关键一环。基于程序化扎根理论的研究思路,对26个数字乡村建设的典型案例进行三级编码,遵循“因果条件-脉络-中介条件-行动策略-成效”的故事线逻辑,围绕动力机制、组织引领机制、要素整合机制、制度保障机制及评价考核机制构建数字乡村建设理论机制模型。动力激励机制作为运行过程的出发点,组织引领机制、要素整合机制和制度保障机制是运行过程的重要环节,评价考核机制作为运行过程的落脚点,各个机制共同作用构成数字乡村建设理论机制完整体系,从而实现数字乡村建设理论机制循环运行。由于数字乡村建设内容繁杂,各地区发展基础参差不齐,因此,要因地制宜找准数字乡村建设关键发力点,解决各地实际问题。

关键词：数字乡村乡村建设程序化扎根理论

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Immediate Effect of Electro-acupuncture on Endometrial Blood Flow in Patients with Recurrent Implantation Failure:A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2024年第4期30卷 291-298页

作者： LAI Yuan-yuan LIU Li-ying WU Yong-na HUANG Lei ZHENG Xiao-yan GAN Di YU Si-yi ZHONG Ying LIANG fan-rong ZHOU Ying YANG Jie Acupuncture and Tuina School Chengdu University of Traditional Chinese MedicineChengdu(610032)China Sichuan Jinxin Xi'nan Women's and Children's Hospital Chengdu(610032)China Yuan TCM Wellness Pte.Ltd.(999002) Pulse TCM SingaporeSingapore

Objective To investigate the immediate effects of electro-acupuncture(EA)on endometrial blood flow among recurrent implantation failure(RIF)*** Eighty RIF patients,enrolled from March 2022 to December 2022,were randomly allocated into either the EA group(40 cases)or the waiting-list(WL)group(40 cases)by using a random number *** EA group underwent acupuncture at points of Shenting(GV 24),Baihui(GV 4),Benshen(GB 13),bilateral Zigong(EX-CA 1),Huangshu(KI 16),Sanyinjiao(SP 6)and Xuehai(SP10),and electric acupuncture apparatus was connected to EX-CA 1,KI 16,SP 6,and SP 10 with disperse-dense waves at 4/20 Hz frequencies for 30 min after transvaginal ultrasound,while the WL group received no *** primary outcome measured was the endometrial volume blood *** secondary outcomes included the bilateral uterine artery index,endometrial volume,endometrial blood flow type,vascular distribution index(VI^(MV))for endometrial and ovary,clinical pregnancy rate,and embryo implantation *** In the EA group,there was a notable decrease in the bilateral pulsatility index and a significant improvement in the endometrial blood flow type post-EA(P0.05).Besides,no adverse events related to EA were *** EA can promptly ameliorate VI^(MV) for the endometrial and right ovary,and endometrial blood flow *** randomized controlled trials are warranted to investigate the long-term effects of EA on blood flow of RIF patients and its implications for pregnancy outcomes.(Trial registration ***2200057377

关键词： electro-acupuncture recurrent implantation failure transvaginal ultrasound endometrial receptivityanalysis randomized controlledtrial

面向带钢表面小目标缺陷检测的改进YOLOv7算法

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合肥工业大学学报（自然科学版） 2024年第3期47卷 303-308,316页

作者：樊嵘马小陆安徽工业大学电气与信息工程学院安徽马鞍山243002

带钢表面小目标缺陷检测是工业质检领域的研究热点。针对热轧带钢表面缺陷检测任务中小目标缺陷易产生漏检的问题,文章提出一种改进的YOLOv7算法。在骨干网络中融入通道空间注意力模块(convolutional block attention module,CBAM)和可... 详细信息

带钢表面小目标缺陷检测是工业质检领域的研究热点。针对热轧带钢表面缺陷检测任务中小目标缺陷易产生漏检的问题,文章提出一种改进的YOLOv7算法。在骨干网络中融入通道空间注意力模块(convolutional block attention module,CBAM)和可重参数化卷积模块,以提升小目标特征的提取效率;采用改进的双向特征金字塔网络(bi-directional feature pyramid network,BiFPN)颈部网络替换原有的路径聚合网络(path aggregation network,PANet)颈部网络,实现对小目标缺陷特征的高效提纯;采用解耦检测头进行检测结果输出,使网络在训练时进一步收敛至更高精度。实验结果表明,改进后的YOLOv7算法在小目标带钢缺陷检测场景下检测精度领先YOLOv7算法4.3 AP50精度,领先YOLOv6算法5.0 AP50精度,领先YOLOX算法4.8 AP50精度,说明该算法可以较好地应用于小目标带钢缺陷检测。

关键词：机器视觉缺陷检测 YOLOv7算法双向特征金字塔网络(BiFPN) 注意力机制

超越社会功能主义:未来素养培育的方法论思考

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中国远程教育 2024年第6期44卷 48-61页

作者：樊溶孙元涛浙江大学教育学院杭州310058

面向明日世界的“未来素养”在实践中被狭隘地等同于“为未来做准备的素养”。这种理解背后隐含的是一种社会功能主义的方法论误区。社会本位论的沿袭、工具理性的僭越与人类对于确定性的寻求,共同建构了社会功能主义在教育变革历程中... 详细信息

面向明日世界的“未来素养”在实践中被狭隘地等同于“为未来做准备的素养”。这种理解背后隐含的是一种社会功能主义的方法论误区。社会本位论的沿袭、工具理性的僭越与人类对于确定性的寻求,共同建构了社会功能主义在教育变革历程中的演进逻辑。超越社会功能主义需要方法论的重构:未来素养不是将人视作治理性话语下的某种“资本”,而是以人为伦理性主体;不是实现单一的未来理想,而是走向“复数乌托邦”;不是一劳永逸的习得性训练,而是递归性循环。唯有此种实现了“回到人”之价值复归的未来素养培育,才能为实现最终走向“超越人”的未来教育提供基础与可能。

关键词：未来素养未来教育社会功能主义

我国《保险法》应明定消费者保护原则——以《保险法》第五次修改为背景

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保险研究 2024年第3期 116-127页

作者：樊启荣郭梦圆中南财经政法大学法学院

当下保险业高速发展,保险消费者权益受侵害的问题日益凸显。《保险法》明定消费者保护原则的必要性,由保险交易之特点决定,体现于保险制度功能的变迁中,并在现代保险立法强调保险消费者保护的理念中得到印证。保险交易中,受保险合同的... 详细信息

当下保险业高速发展,保险消费者权益受侵害的问题日益凸显。《保险法》明定消费者保护原则的必要性,由保险交易之特点决定,体现于保险制度功能的变迁中,并在现代保险立法强调保险消费者保护的理念中得到印证。保险交易中,受保险合同的附合性、信息偏在问题以及消费者自身局限等因素的影响,保险消费者劣势地位明显。保险制度的功能经历了从“分散海上风险”到“防范道德风险”,再到“保护被保险大众”的演进。海上保险属商人保险,立法更多考虑保险人利益;现代保险中消费者保险占据重要地位,立法更侧重保险消费者权益保护。现行《保险法》第1条虽然确立了保护保险活动当事人合法权益的立法目的,但忽视了保险消费者相较于保险人的劣势地位。未来应以《保险法》第五次修改为契机,在总则立法目的中明定消费者保护原则,申明保险消费者保护的重要性,以期对保险消费者保护理念的深入及相关规则之适用有所助益。

关键词：商人保险消费者保险信息不对称消费者保护原则消费者权益保护

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面向拥挤行人检测的改进YOLOv7算法

计算机工程 2024年第3期50卷 250-258页

作者：徐芳芯樊嵘马小陆京都情报大学院大学应用信息技术研究科日本京都606-8225 安徽工业大学电气与信息工程学院安徽马鞍山243002

针对拥挤行人检测场景下检测算法容易产生漏检与误检的问题,提出一种改进的YOLOv7拥挤行人检测算法。在骨干网络中引入BiFormer视觉变换器和改进的高效层聚合网络(RC-ELAN)模块,通过自注意力机制与注意力模块使骨干网络更多聚焦于被遮... 详细信息

针对拥挤行人检测场景下检测算法容易产生漏检与误检的问题,提出一种改进的YOLOv7拥挤行人检测算法。在骨干网络中引入BiFormer视觉变换器和改进的高效层聚合网络(RC-ELAN)模块,通过自注意力机制与注意力模块使骨干网络更多聚焦于被遮挡行人的重要特征,有效缓解了目标特征缺失对检测造成的负面影响。采用基于双向特征金字塔网络思想的改进颈部网络,通过转置卷积和改进的Rep-ELAN-W模块使模型可以高效利用中低维特征图中的小目标特征信息,有效提升了模型的小目标行人检测性能。引入高效的完全交并比损失函数,使模型可以进一步收敛至更高精度。在含有大量小目标遮挡行人的WiderPerson数据集上的实验结果表明,与YOLOv7、YOLOv5、YOLOX算法相比,改进的YOLOv7算法的交并比阈值分别取0.5和0.5~0.95时的平均精准度提升了2.5和2.8、9.9和7.1、12.3和10.7个百分点,可较好地应用于拥挤行人检测场景。

关键词：机器视觉拥挤行人检测注意力机制 YOLO系列算法双向特征金字塔网络