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Road sub-surface defect detection based on gprMax forward simulation-sample generation and Swin Transformer-YOLOX

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Frontiers of Structural and Civil Engineering 2024年第3期18卷 334-349页

作者： Longjian LI Li YANG Zhongyu HAO xiaoli sun Gongfa CHEN School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006China JSTI Group Guizhou Engineering Survey and Design Co. Ltd.Guangzhou 510800China Guangzhou Municipal Engineering Testing Co. Ltd.Guangzhou 510520China

Training samples for deep learning networks are typically obtained through various field experiments,which require significant manpower,resource and time ***,it is possible to utilize simulated data to augment the training *** this paper,by comparing the actual experimental model with the simulated model generated by the gprMax[1]forward simulation method,the feasibility of obtaining simulated samples through gprMax simulation is ***,the samples generated by gprMax forward simulation are used for training the network to detect objects in existing real *** the same time,aiming at the detection and intelligent recognition of road sub-surface defects,the Swin-YOLOX algorithm is introduced,and the excellence of the detection network,which is improved by augmenting the simulated samples with real samples,is further *** comparing the prediction performance of the object detection models,it is observed that the model trained with mixed samples achieved a recall of 94.74%and a mean average precision(maP)of 97.71%,surpassing the model trained only on real samples by 12.95%and 15.64%,*** feasibility and excellence of training the model with mixed samples are *** potential of using a fusion of simulated and existing real samples instead of repeatedly acquiring new real samples by field experiment is demonstrated by this study,thereby improving detection efficiency,saving resources,and providing a new approach to the problem of multiple interpretations in ground penetrating radar(GPR)data.

关键词： ground penetrating radar gprMax forward modeling sample generation Swin-YOLOX object detection

Theoretical investigations on the growth of graphene by oxygenassisted chemical vapor deposition

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Nano Research 2024年第6期17卷 4645-4650页

作者： xiaoli sun Chaojie Yu Yujia Yang Zhihao Li Jianjian Shi Wanjian Yin Zhongfan Liu Beijing Graphene Institute(BGI) Beijing 100095China School of Physics and Electronics Shandong Normal UniversityJinan 250014China College of Energy Soochow Institute for Energy and Materials InnovationsLight Industry Institute of Electrochemical Power SourcesSUDA-BGI Collaborative Innovation CenterSoochow UniversitySuzhou 215006China School of Electronic Engineering Chengdu Technological UniversityChengdu 611730China Center for Nanochemistry Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Recently,graphene has drawn considerable attention in the field of electronics,owing to its favorable conductivity and high carrier *** to the industrialization of graphene is its high-quality microfabrication via chemical vapor ***,many problems remain in its preparation,such as the not fully understood cracking mechanism of the carbon source,the mechanism of its substrate oxidation,and insufficient defect repair *** help close this capability gap,this study leverages density functional theory to explore the role of O in graphene *** effects of Cu substrate oxidation on carbon source cracking,nucleation barriers,crystal nucleus growth,and defect repairs are *** was found to reduce energy change during dehydrogenation,rendering the process ***,the adsorbed O in graphene or its Cu substrate can promote defect repair and edge growth.

关键词： density functional theory oxygen-assisted graphene growth chemical vapor deposition Cu substrate

MIR1868 negatively regulates rice cold tolerance at both the seedling and booting stages

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The Crop Journal 2024年第2期12卷 375-383页

作者： Yang Shen Xiaoxi Cai Yan Wang Wanhong Li Dongpeng Li Hao Wu Weifeng Dong Bowei Jia Mingzhe sun xiaoli sun Crop Stress Molecular Biology Laboratory Heilongjiang Bayi Agricultural UniversityDaqing 163319HeilongjiangChina

Low temperature causes rice yield losses of up to 30%–40%,therefore increasing its cold tolerance is a breeding *** genes in rice are reported to confer cold tolerance at both the vegetative and reproductive *** study revealed a rice-specific 24-nt miRNA,miR1868,whose accumulation was suppressed by cold *** of MIR1868 increased seedling survival,pollen fertility,seed setting,and grain yield under cold stress,whereas its overexpression conferred the opposite *** of MIR1868 increased reactive oxygen species(ROS)scavenging and soluble sugar content under cold stress by increasing the expression of peroxidase genes and sugar metabolism genes,and its overexpression produced the opposite ***,MIR1868 negatively regulated rice cold tolerance via ROS scavenging and sugar accumulation.

关键词： Rice Cold tolerance miRNA ROS scavenging Soluble sugar accumulation

Design and fabrication of self-suspending aluminum-plastic/semiconductor photocatalyst devices for solar energy conversion

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Journal of Environmental Sciences 2024年第2期136卷 615-625页

作者： Zhi-Ang Zhao Jingyun Mao Chengjing Lu Shuangqiao Yang Qingrong Qian Qinghua Chen Hun Xue xiaoli sun Min-Quan Yang College of Environmental and Resource Sciences College of Carbon Neutral Modern IndustryFujian Key Laboratory of Pollution Control and Resource ReuseFujian Normal UniversityFuzhou 350007China State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversityChengdu 610065China

The design and synthesis of self-suspending photocatalyst device with easy recyclability is important for practical ***,this work utilizes aluminum-plastic package waste as raw material to prepare an aluminum-plastic supported TiO_(2)(AP-TiO_(2))photocatalyst device through 3D printing design and surface deposition method.A series of characterizations were carried out to explore the structure,morphology and performance of the AP-TiO_(2)*** UV light illumination,the AP-TiO_(2)-50 efficiently degrade 93.6%tetracycline hydrochloride(THC)after 4 hr,which increases by 8.3%compared with that of TiO_(2)powder suspension system with the same catalyst *** on it,AP-ZnO,AP-CdS,AP-g-C_3N_4and AP-Pt-TiO_(2)are also fabricated,and applied in photocatalytic degradation and hydrogen evolution,which all exhibit higher photoactivities than powder suspension *** work provides a new avenue for the fabrication of advanced recyclable photocatalyst ***,the work offers a novel sight for the high-value utilization of aluminum-plastic package waste,which has positive implications for environmental protection.

关键词： TiO_(2) Self-suspending Photocatalyst device Aluminum plastic

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一个具有大范围超混沌状态的五维多稳态系统

华南理工大学学报（自然科学版） 2024年第1期52卷 139-146页

作者：曾以成李文轩孙小力湘潭大学物理与光电工程学院湖南湘潭411105 山东财经大学燕山学院山东济南250000

大范围混沌系统由于能提供更宽的混沌区间,常用于保密通信等领域,已有的大范围混沌系统多为三维和四维系统,为了得到混沌特性更强和更复杂的系统,本研究提出了一个具有大范围超混沌状态且能产生多种共存吸引子的五维系统。通过用共存分... 详细信息

大范围混沌系统由于能提供更宽的混沌区间,常用于保密通信等领域,已有的大范围混沌系统多为三维和四维系统,为了得到混沌特性更强和更复杂的系统,本研究提出了一个具有大范围超混沌状态且能产生多种共存吸引子的五维系统。通过用共存分岔图、共存相轨图、Lyapunov指数谱以及计算系统散度等方法去分析该五维系统的动力学特性。结果表明:该系统是一个耗散的超混沌系统;参数固定时,仅改变初始值系统能产生多个共存吸引子,当参数d取不同的值时,该系统会产生12种类型的共存现象,分别为周期1、周期2、周期4、拟周期、一涡卷吸引子、双涡卷吸引子等相互共存;当参数m在[0.1,4000]区间变化时,该系统会一直保持超混沌状态,并且m在[70,4000]范围内,系统的Lyapunov指数谱保持不变且维持3个正Lyapunov指数的超混沌状态,说明了该系统具有不变Lyapunov指数特性。此外,用现场可编程门阵列(FPGA)进行数字电路实现,在示波器上观察实验结果,验证了该超混沌系统的可实现性。

关键词：大范围超混沌系统正Lyapunov指数共存吸引子现场可编程门阵列

Asymmetrical Fabry-Perot cavity slot micro-ring resonator and its sensing characteristics

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Journal of Measurement Science and Instrumentation 2024年第3期15卷 292-301页

作者： CAO Qianqian LIU Chunjuan WU Xiaosuo sun xiaoli School of Electronic and Information Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

To achieve high quality factor and high-sensitivity refractive index sensor,a slot micro-ring resonator(MRR)based on asymmetric Fabry-Perot(FP)cavity was *** structure consisted of a pair of elliptical holes to form an FP cavity and a microring *** two different optical modes generated by the micro-ring resonator were destructively interfered to form a Fano line shape,which improved the system sensitivity while obtaining a higher quality factor and extinction *** transmission principle of the structure was analyzed by the transfer matrix *** transmission spectrum and mode field distribution of the proposed structure were simulated by the finite difference time domain(FDTD)method,and the key structural parameters affecting the Fano line shape in the device were *** simulation results show that the quality factor of the device reached 22037.1,and the extinction ratio was 23.9 *** analyzing the refractive index sensing characteristics,the sensitivity of the structure was 354 nm·RIU−1,and the detection limit of the sensitivity was 2×10−4 ***,the proposed compact asymmetric FP cavity slot micro-ring resonator has obvious advantages in sensing applications owing to its excellent performance.

关键词： micro-ring resonator(MRR) Fabry-Perot(FP)cavity Fano resonance refractive index sensing integrated optics silicon waveguide

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数字化时代高职教师的数字化转型探析

大学（研究与管理） 2024年第6期 145-148页

作者：孙小丽江西财经职业学院会计学院江西九江332000

数字化时代,将数字技术融于教育是当前高职教育改革的重点,是落实国家数字化战略的必然需求。文章通过查阅文献,阐述了教师数字化转型的内涵,对高职院校当前数字化转型现状进行了分析,列举了教师数字化转型较为突出的误区。从优化持续... 详细信息

数字化时代,将数字技术融于教育是当前高职教育改革的重点,是落实国家数字化战略的必然需求。文章通过查阅文献,阐述了教师数字化转型的内涵,对高职院校当前数字化转型现状进行了分析,列举了教师数字化转型较为突出的误区。从优化持续性的顶层设计、开发融合性的课程资源、搭建智慧化的教学场域、创建数据赋能的教学评价、探索面向未来的教育新能力五个方面提出了高职教师数字化转型的实践方向,以期为数字化时代高职教师的数字化转型研究和实践提供参考。

关键词：数字化时代高职教师数字化转型教学场域

血清miR-23a、miR-150、miR-150-5p水平与糖尿病性骨质疏松症的相关性

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实用医学杂志 2024年第16期40卷 2244-2249页

作者：孙晓利范慧洁河南中医药大学第五临床医学院(郑州人民医院)内分泌科郑州450000

目的分析微小核糖核酸(miR)-23a、miR-150、miR-150-5p水平与糖尿病性骨质疏松症(DOP)的相关性。方法选取2020年3月至2022年3月于医院就诊的糖尿病患者200例,随访2年,将发生DOP、未发生DOP的患者分别纳入DOP组、无DOP组。比较两组一般... 详细信息

目的分析微小核糖核酸(miR)-23a、miR-150、miR-150-5p水平与糖尿病性骨质疏松症(DOP)的相关性。方法选取2020年3月至2022年3月于医院就诊的糖尿病患者200例,随访2年,将发生DOP、未发生DOP的患者分别纳入DOP组、无DOP组。比较两组一般资料及血清miR-23a、miR-150、miR-150-5p水平;经Pearson相关性分析法分析血清miR-23a、miR-150、miR-150-5p水平与骨密度的相关性;经Logistic回归模型分析DOP的影响因素。结果DOP发生率为28.89%;DOP组血清miR-23a、miR-150、miR-150-5p水平均高于无DOP组(P<0.05);Pearson相关性分析显示,糖尿病患者血清miR-23a、miR-150、miR-150-5p水平与骨密度均呈负相关(P<0.05);logistic回归模型分析显示,年龄、体质量指数(BMI)、miR-23a、miR-150、miR-150-5p是DOP的影响因素(P<0.05)。结论DOP患者中血清miR-23a、miR-150、miR-150-5p水平升高,三者均与骨密度均呈负相关,且均是DOP发生的影响因素。

关键词：糖尿病骨质疏松症微小核糖核酸-23a 微小核糖核酸-150 微小核糖核酸-150-5p

商务英语教育中的文化素养融入与教学改革研究

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科教导刊 2024年第20期 44-46页

作者：孙晓力国家林业和草原局管理干部学院北京102600

在商务英语教育领域,文化素养的融入被视为提升学生跨文化交流能力的关键。然而,现有的商务英语教育体系在文化素养的融入和教学方法上存在明显不足,这影响了学生的国际商务实践能力,也限制了学生的全球竞争力。基于此,文章旨在通过系... 详细信息

在商务英语教育领域,文化素养的融入被视为提升学生跨文化交流能力的关键。然而,现有的商务英语教育体系在文化素养的融入和教学方法上存在明显不足,这影响了学生的国际商务实践能力,也限制了学生的全球竞争力。基于此,文章旨在通过系统的分析和研究,探讨在商务英语教育中有效融入文化素养,并提出创新的教学策略,以期达到提升教学质量和学生国际竞争力的目的。

关键词：商务英语教育文化素养文化差异

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