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Journal of Energy Chemistry 2024年第10期97卷 419-428页

作者： Yu Liu Kun Lang Huifang Han Huijing Liu Yao Fu Pengchen Zou yinhui lyu Jia Xu Jianxi Yao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing Key Laboratory of Energy Safety and Clean Utilization North China Electric Power University

CsPbI2Br perovskite solar cell has been extensively studied due to its exceptional thermal stability and relatively stable perovskite phase ***,the presence of bromine leads to a rapid crystallization rate of CsPbI2Br films,resulting in small grain size and high defect ***,CsPbI2Br demonstrates poor light absorption due to its wide ***,it is crucial to control the crystallization rate and increase the film thickness to reduce defect density,enhance light absorption,and improve photovoltaic *** this study,we utilized a PbAc2-incorporated twice spincoating（PTS） process to address these ***,PbAc2was added to the CsPbI2Br precursor solution to form a CsPbI2Br film,which was then coated with the CsPbI2Br precursor solution to produce the PTS film,Ac-can delay the perovskite crystallization,leading to the formation of thicker and denser CsPbI2Br ***,lone-pair electrons of the oxygen atom provided by Ac-formed coordination bonds with under-coordinated Pb2+ions to fill halogen ion vacancies,thereby reducing the defect ***,the PTS CsPbI2Br device achieved a peak power conversion efficiency（PCE） of 16.19% and maintained 96.7% of its initial PCE over 1500 h at room temperature under 25% relative humidity without any encapsulation.

关键词： Crystallization management CsPbI2Br PbAc2 Perovskite solar cells Twice spin-coating process

Research on Anti-Fluctuation Control of Winding Tension System Based on Feedforward Compensation

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 1239-1261页

作者： Yujie Duan Jianguo Liang Jianglin Liu Haifeng Gao yinhui Li Jinzhu Zhang Xinyu Wen College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan030024China College of Electronic Information and Optical Engineering Taiyuan University of TechnologyTaiyuan030024China School of Electronic Information Engineering Taiyuan University of Science and TechnologyTaiyuan030000China

In the fiber winding process,strong disturbance,uncertainty,strong coupling,and fiber friction complicate the winding constant tension *** order to effectively reduce the influence of these problems on the tension output,this paper proposed a tension fluctuation rejection strategy based on feedforward *** addition to the bias harmonic curve of the unknown state,the tension fluctuation also contains the influence of bounded noise.A tension fluctuation observer(TFO)is designed to cancel the uncertain periodic signal,in which the frequency generator is used to estimate the critical parameter ***,the fluctuation signal is reconstructed by a third-order auxiliary *** estimated signal feedforward compensates for the actual tension ***,a time-varying parameters fractional-order PID controller(TPFOPID)is realized to attenuate the bounded noise in the ***,TPFOPID is enhanced by TFO and applied to control a tension control system considering multi-source *** stability of the method is analyzed by using the Lyapunov ***,numerical simulations verify that the proposed scheme improves the tracking ability and robustness of the system in response to tension fluctuations.

关键词： Constant tension control anti-fluctuation strategy tension fluctuation observer time-varying parameters fractional-order PID controller feedforward compensate

Multiple-dimensioned defect engineering for graphite felt electrode of vanadium redox flow battery

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Carbon Energy 2024年第2期6卷 143-153页

作者： Yingqiao Jiang yinhui Wang Gang Cheng Yuehua Li Lei Dai Jing Zhu Wei Meng Jingyu Xi Ling Wang Zhangxing He School of Chemical Engineering North China University of Science and TechnologyTangshanChina Tsinghua Shenzhen International Graduate School Institute of Materials ResearchTsinghua UniversityShenzhenChina

The scarcity of wettability,insufficient active sites,and low surface area of graphite felt(GF)have long been suppressing the performance of vanadium redox flow batteries(VRFBs).Herein,an ultra-homogeneous multipledimensioned defect,including nano-scale etching and atomic-scale N,O codoping,was used to modify GF by the molten salt ***_(4)Cl and KClO_(3) were added simultaneously to the system to obtain porous N/O co-doped electrode(GF/ON),where KClO_(3) was used to ultra-homogeneously etch,and O-functionalize electrode,and NH4Cl was used as N dopant,***/ON presents better electrochemical catalysis for VO_(2)+/VO_(2)+ and V3+/V2+ reactions than only O-functionalized electrodes(GF/O)and *** enhanced electrochemical properties are attributed to an increase in active sites,surface area,and wettability,as well as the synergistic effect of N and O,which is also supported by the density functional theory ***,the cell using GF/ON shows higher discharge capacity,energy efficiency,and stability for cycling performance than the pristine cell at 140 mA cm^(−2) for 200 ***,the energy efficiency of the modified cell is increased by 9.7% from 55.2% for the pristine cell at 260 mA cm^(−2).Such an ultra-homogeneous etching with N and O co-doping through“boiling”molten salt medium provides an effective and practical application potential way to prepare superior electrodes for VRFB.

关键词： graphite felt molten salt N O co-doping ultra-homogeneous etching vanadium redox flow battery

The Protective Effects of Flavonoids from Scutellaria Baicalensis Georgi Stems and Leaves on Oligodendrocyte Damage Induced by Aβ_1-42

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Pharmacology & Pharmacy 2024年第1期15卷 1-13页

作者： Tangtang Song yinhui Yao Yazhen Shang Institute of Traditional Chinese Medicine Chengde Medical College Chengde China Hebei Province Key Research Office of Traditional Chinese Medicine against Dementia Hebei Province Key Laboratory of Traditional Chinese Medicine Research and Development Hebei Key Laboratory of Nerve Injury and Repair Chengde China

Aim: This study aimed to investigate the protective effects of flavonoids from the stem and leaves of Scutellaria baicalensis Georgi (SSFs) against Aβ1-42-induced oligodendrocytes (OL) damage. Methods: Immunofluorescence was used for the detection of myelin-associated glycoprotein (MAG), a characteristic protein of rat oligodendrocytes (OLN-93 cells). To evaluate the potential protective effects of SSFs on OLN-93 cells injured by Aβ1-42, an injury model was established by subjecting OLN-93 cells to Aβ1-42 exposed. Cell morphology was examined using an inverted microscope, while cell viability was assessed using the colorimetric method of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). Additionally, lactate dehydrogenase (LDH) was measured using the pyruvic acid reduction assay. The Ginkgo biloba leaf extract (GBE) injection was used as a positive control. Results: A total of >95% of the MAG immunofluorescence-positive cells were identified as oligodendrocytes. Gradually increasing concentrations of SSFs impaired the cells, and the maximum nondetrimental dose for OLN-93 cells was 75 mg/L. This study assessed the effects of SSFs on OLN-93 cells damaged by Aβ1-42. The results indicated that SSFs significantly improved OLN-93 cell morphological abnormal changes, increased the OLN-93 cell survival rate, and reduced LDH release. Conclusion: SSFs can alleviate Aβ1-42-induced damage of OL.

关键词： Flavonoids form the Stem and Leaves of Scutellaria baicalensis Georgi Aβ1-42 Oligodendrocytes Damage

无风条件下近地爆烟尘的大气γ电离辐射环境模拟

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强激光与粒子束 2024年第4期36卷 195-201页

作者：郭思禹程引会郭俊西安交通大学电力设备电气绝缘国家重点实验室西安710049

近地爆烟尘由不同粒径尺度的放射性颗粒组成,且运动的时空尺度大。针对近地爆烟尘的大气γ电离辐射环境模拟这一难题,首先开展了γ大气辐射机理分析,进行了无风条件设定,建立了烟尘γ辐射的理论模型,其次引入和提出了相应的数值差分与... 详细信息

近地爆烟尘由不同粒径尺度的放射性颗粒组成,且运动的时空尺度大。针对近地爆烟尘的大气γ电离辐射环境模拟这一难题,首先开展了γ大气辐射机理分析,进行了无风条件设定,建立了烟尘γ辐射的理论模型,其次引入和提出了相应的数值差分与积分算法,最后给出了对1000 kt内华达近地爆烟尘在大气中的放射性活度和辐射剂量率的模拟算例,完成了一定的辐射环境时空演变规律总结与结果对比,对比发现本模型在保证活度结果一致性的同时,能计算出大气辐射剂量率的理论最大值。

关键词：近地爆烟尘大气γ电离辐射放射性活度辐射剂量率

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基于ReaxFF的不黏煤燃烧过程中自由基及主要燃烧产物生成规律研究

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矿业安全与环保 2024年第4期51卷 80-89页

作者：王银辉煤炭科学研究总院北京100013 中煤科工集团沈阳研究院有限公司辽宁沈抚示范区113122 煤矿灾害防控全国重点实验室辽宁抚顺113122

为了探究不黏煤燃烧过程中自由基及主要燃烧产物生成规律,采用X射线光电子能谱(XPS)和核磁共振谱(^(13)C NMR)实验方法,对不黏煤进行表征分析,构建了分子式为C_(208)H_(199)O_(23)N_(3)S的不黏煤分子模型。在不同O_(2)分子数与温度条件... 详细信息

为了探究不黏煤燃烧过程中自由基及主要燃烧产物生成规律,采用X射线光电子能谱(XPS)和核磁共振谱(^(13)C NMR)实验方法,对不黏煤进行表征分析,构建了分子式为C_(208)H_(199)O_(23)N_(3)S的不黏煤分子模型。在不同O_(2)分子数与温度条件下,应用反应分子动力学(ReaxFF MD)方法进行不黏煤的燃烧分子动力学模拟,探究其燃烧过程中自由基与主要产物的生成与消耗规律。研究结果表明:消耗OH自由基主要反应的总次数为1906次,消耗H自由基与O自由基的总次数分别为3733、2033次,提高温度和O_(2)分子数使得相对稳定的OH自由基产量峰值增幅更大,H自由基与O自由基的产量峰值增幅相对较小;消耗CO_(2)主要反应的总次数为1781次,低于消耗CO与H_(2)O主要反应总次数,提高温度和O_(2)分子数使得相对稳定的CO_(2)产量峰值增幅更大。提高O_(2)分子数对H_(2)O的产量峰值影响呈现先促进再抑制的趋势;H自由基、O自由基及OH自由基主要由小分子化合物或其他自由基发生分解反应生成。自由基聚合或小分子化合物分解反应是CO、CO_(2)及H_(2)O生成的主要路径。

关键词：煤分子模型 ReaxFF MD 燃烧势能自由基煤燃烧产物

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融合结构重参数化变换的气体泄漏红外检测

光子学报 2024年第1期53卷 187-201页

作者：庄宏张印辉何自芬曹辉柱昆明理工大学机电工程学院昆明650500

针对常规工业气体泄漏检测装置需泄漏扩散到一定范围并与传感器接触时才能响应的不足,提出一种融合结构重参数化变换的红外非接触式检测网络模型GRNet。GRNet模型采用Mosaic-Gamma变换的预处理方法增加泄漏样本数量并提高图像对比度以... 详细信息

针对常规工业气体泄漏检测装置需泄漏扩散到一定范围并与传感器接触时才能响应的不足,提出一种融合结构重参数化变换的红外非接触式检测网络模型GRNet。GRNet模型采用Mosaic-Gamma变换的预处理方法增加泄漏样本数量并提高图像对比度以增强模型的鲁棒性;通过K-means聚类分析出适用于气体泄漏红外检测的候选框以预置模型参数;优化定位损失函数以提高模型对泄漏区域的定位准确性;采用改进后的轻量化网络RepVGG模块重构特征提取网络增强模型的特征提取能力,以实现轻量化并提高检测精度。实验结果表明,GRNet模型对氨气泄漏的平均检测精度达到94.90%,单张图像平均检测时间达到3.40 ms。采用伪色彩映射实现泄漏浓度的视觉感知效果,采用PyQt5将GRNet模型进行封装实现气体泄漏红外检测系统界面的可视化并在Jetson Nano B01嵌入式实验平台部署该模型,验证了实际工程应用的可行性和有效性,为开发气体泄漏非接触探测装置以保障涉气企业的安全生产和稳定运行提供一种有效的检测算法。

关键词：目标检测气体泄漏检测定位损失函数图像预处理聚类分析结构重参数化

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注意力引导的多尺度红外行人车辆实时检测

红外与激光工程 2024年第5期53卷 229-239页

作者：张印辉计凯何自芬陈光晨昆明理工大学机电工程学院云南昆明650500

红外成像技术通过捕捉目标热辐射特征进行成像,能实现复杂道路场景下的目标监测和道路冗杂信息滤除。针对红外行人和车辆目标检测模型参数量大、依赖高性能GPU资源和检测速度慢等问题,提出了一种注意力引导的多尺度红外行人车辆实时检... 详细信息

红外成像技术通过捕捉目标热辐射特征进行成像,能实现复杂道路场景下的目标监测和道路冗杂信息滤除。针对红外行人和车辆目标检测模型参数量大、依赖高性能GPU资源和检测速度慢等问题,提出了一种注意力引导的多尺度红外行人车辆实时检测模型。首先,为精确匹配校准红外行人和车辆目标尺度与锚框尺寸,利用K-Means++算法对红外行人和车辆目标尺度进行先验框预置参数重聚类生成,并设计128×128精细尺度检测层;其次,设计注意力引导广域特征提取模块增强模型特征提取能力和空间及通道信息聚焦能力;随后,构建跨空间感知模块引入空间信息感知,强化不同尺度空间下的目标的特征表达能力;最后,针对资源受限设备,通过4倍通道剪枝方法降低模型参数量,增强移动端算法部署适应性。实验结果表明:所提IRDet算法与基准方法相比,模型平均检测精度提升4.3%,达到87.4%,模型权重值压缩60.4%,降至5.7 MB。

关键词：红外交通检测先验框匹配注意力引导跨空间感知模型剪枝

反兴奋剂教育的立法反思与规范形塑——基于中国高水平运动员及辅助人员反兴奋剂教育情况调查的实证研究

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武汉体育学院学报 2024年第2期58卷 30-37页

作者：李茵晖黎浩田章晓菲武汉大学法学院湖北武汉430064 中南财经政法大学体育部湖北武汉430005 中南财经政法大学统计与数学学院湖北武汉430005

《反兴奋剂条例(修订草案)》新增了关于反兴奋剂教育的一系列规定。值此修法之际,评估反兴奋剂教育的实际效果,对于反兴奋剂教育规则的规范塑造尤为重要。这涉及探寻何种因素显著影响了反兴奋剂教育效果,以及基于对这些显著影响因素的考... 详细信息

《反兴奋剂条例(修订草案)》新增了关于反兴奋剂教育的一系列规定。值此修法之际,评估反兴奋剂教育的实际效果,对于反兴奋剂教育规则的规范塑造尤为重要。这涉及探寻何种因素显著影响了反兴奋剂教育效果,以及基于对这些显著影响因素的考量,如何构建一个更加完善的反兴奋剂教育规则体系。对此,笔者进行了一项针对中国高水平运动员及辅助人员的反兴奋剂教育情况调查。研究发现,反兴奋剂教育活动的规格、时长、频次以及受访者的项目类型和学习意愿等因素对反兴奋剂教育效果起着显著作用。基于此,笔者提出应当从义务与权利规则整体均衡、规则设置考量要素系统均衡、规则内容构设动态均衡三个维度形塑反兴奋剂教育的法律规范,推动该领域规范供给的科学化、精细化,以确保在法治框架内贯彻落实习近平总书记关于反兴奋剂工作的重要指示精神。

关键词：反兴奋剂教育规则体系规范塑造均衡模型高水平运动员

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核心素养视角下小学英语“教—学—评一体化”理解与实践——以小学英语作业设计与评价为例

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英语教师 2024年第6期24卷 185-187,191页

作者：苏银辉北京新东方扬州外国语学校江苏扬州225006

根据《义务教育英语课程标准(2022年版)》的相关阐述,分析对“教—学—评一体化”的理论理解。以译林牛津版小学《英语》六年级(上)Unit 6 Keep our city clean为例,探究“教—学—评一体化”的实施,总结“教—学—评一体化”的实践思路... 详细信息

根据《义务教育英语课程标准(2022年版)》的相关阐述,分析对“教—学—评一体化”的理论理解。以译林牛津版小学《英语》六年级(上)Unit 6 Keep our city clean为例,探究“教—学—评一体化”的实施,总结“教—学—评一体化”的实践思路,提出“教—学—评一体化”的实施原则。

关键词：小学英语教—学—评一体化理论理解英语学科核心素养