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一种MV级峰化电容一体化电容分压器的研制

强激光与粒子束 2024年第9期36卷 111-119页

作者：李奇胜李俊娜李楚男王永亮龚渝涵刘建西安交通大学电力设备电气绝缘国家重点实验室西安710049

峰化电容器由于结构紧凑一般采用间接测量其承受的电压,而峰化电容电压的直接测量一直是难以解决的问题。为了解决该问题,以峰化电容器为基础,研制了一种新型结构的电阻补偿式自积分型峰化电容一体化电容分压器。其次,根据分压器的新型... 详细信息

峰化电容器由于结构紧凑一般采用间接测量其承受的电压,而峰化电容电压的直接测量一直是难以解决的问题。为了解决该问题,以峰化电容器为基础,研制了一种新型结构的电阻补偿式自积分型峰化电容一体化电容分压器。其次,根据分压器的新型结构分析了峰化电容一体化电容分压器的理论分压比,给出了理论分压比计算公式,分析了影响低频响应的因素并进行了电路仿真验证。同时,开展了方波标定实验,得到了两个探头的分压比及响应时间,且探头响应时间均小于6.2 ns。此外,为了得到更准确的分压比并验证正常工作状态下该一体化电容分压器分压比的稳定性,进行了高压在线标定实验,得到了1#探头分压比为11 071,2#探头分压比为15 148。且在更高电压等级下,该电容分压器探头的测量相对误差较小,分压比稳定性良好。

关键词：峰化电容器电阻补偿电容分压器分压比高压脉冲

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体育产业助推乡村振兴的价值审视与实现路径

辽宁经济职业技术学院学报.辽宁经济管理干部学院 2024年第3期133卷 16-18页

作者：鲍宏建李其盛信阳职业技术学院河南信阳464000

乡村的繁荣发展是国家经济和社会发展的重要保障,也是实现中国式现代化的重要支撑。体育产业具有促进经济长效发展的重要价值,能够帮助乡村迈入新产业、新经济格局。为实现体育产业助推乡村振兴,有关部门要依照自身特色设计建设方案,吸... 详细信息

乡村的繁荣发展是国家经济和社会发展的重要保障,也是实现中国式现代化的重要支撑。体育产业具有促进经济长效发展的重要价值,能够帮助乡村迈入新产业、新经济格局。为实现体育产业助推乡村振兴,有关部门要依照自身特色设计建设方案,吸收地方企业的助推资源、强化政策及资源供给力度,增设体育产业项目、创设先教育后工作模式,激活农村体育建设活力,从而实现体育产业助推乡村振兴。

关键词：体育产业乡村振兴农村体育

乡村振兴战略背景下休闲体育融入乡村旅游路径研究

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辽宁经济职业技术学院学报.辽宁经济管理干部学院 2024年第2期132卷 12-14页

作者：李其盛鲍宏建信阳职业技术学院河南信阳464000

乡村旅游是我国乡村经济发展的重要驱动力,其与休闲体育的融合,能够提升我国乡村供给侧改革的效率与质量。相关部门与社会组织应在全面理解休闲体育与乡村旅游的内涵和融合优势的基础上,采取深化乡村旅游与休闲体育融合模式、构建体育... 详细信息

乡村旅游是我国乡村经济发展的重要驱动力,其与休闲体育的融合,能够提升我国乡村供给侧改革的效率与质量。相关部门与社会组织应在全面理解休闲体育与乡村旅游的内涵和融合优势的基础上,采取深化乡村旅游与休闲体育融合模式、构建体育旅游品牌、扩大乡村休闲体育旅游媒体宣传、优化民族民间体育资源等路径,推进乡村旅游业的高质量发展。

关键词：乡村振兴战略休闲体育乡村旅游融合路径

臂式离心机机室空气内摩擦功率及支座摩擦系数的实验反演分析

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机电工程 2024年第5期41卷 933-940页

作者：尹益辉黎启胜李上明陈红永罗昭宇刘丹锋中国工程物理研究院总体工程研究所四川绵阳621999

为了提高臂式离心机驱动功率的预估精度,对工程解析计算方法中几个前提参数(即机室空气内摩擦发热消耗功率与总风阻功率之比C_(1)、机室内空气从出风口自然流出的线速度与其环向线速度之比C_(2)、支座的摩擦系数f_(e))的确定方法进行了... 详细信息

为了提高臂式离心机驱动功率的预估精度,对工程解析计算方法中几个前提参数(即机室空气内摩擦发热消耗功率与总风阻功率之比C_(1)、机室内空气从出风口自然流出的线速度与其环向线速度之比C_(2)、支座的摩擦系数f_(e))的确定方法进行了研究。首先,针对一台臂式离心机以四种不同转速稳定运行的状态,利用离心机控制系统,读取了四组驱动电枢电压U和电枢电流I数据,采用三杯仪测试了四个空气从出风口流出的线速度V_(0)数据;然后,根据离心机风阻功率、排风功率和支座摩擦功率的解析理论表达式、能量守恒原理,建立了含待定系数C_(1)、C_(2)、f_(e1)和f_(e2)的关于U、I和V_(0)的求解方程,并将四组实测数据U、I和V_(0)代入所建方程,得到了关于系数C_(1)、C_(2)、f_(e1)和f_(e2)的求解方程组;最后,将所得C_(1)、C_(2)、f_(e1)和f_(e2)的值用于计算另一台类似臂式离心机的驱动功率。研究结果表明:所得驱动功率的计算结果比实测结果大2.23%,而以前依据经验取定C_(1)、C_(2)和f_(e)时的计算结果比实测结果小6.30%。对应用实例的综合分析表明:所建方法可弥补这些参数在以前的工程计算中,其取值缺乏实验依据的不足,提高这些参数的取值准确性和臂式离心机驱动功率的预估精度。

关键词：臂式离心机土工离心机风阻功率空气内摩擦支座摩擦功率实验反演前提参数

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Effect of Molecular Weight on Thermoelectric Performance of P3HT Analogues with 2-Propoxyethyl Side Chains

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 268-281页

作者：董得福 WANG Wei ZHAN Chun li Chenglong ZHOU qisheng 肖生强 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

By replacing hexyl chains in poly(3-hexylthiophene)(P3HT)with 2-propoxyethyls,four poly(3-(2-propoxyethyl)thiophene)(P3POET)homopolymers with comparable polydispersity indexes(PDI)and regioregularities were prepared herein in addition with step increment of about 7 kDa on numberaverage molecular weight(M_(n))from around 11 to 32 kDa(accordingly denoted as P11k,P18k,P25k,and P32k).When doped in film by FeCl_(3)at the optimized conditions,the maximum power factor(PF_(max))increases greatly from 4.3μW·m^(-1)·K^(-2)for P11k to 8.8μW·m^(-1)·K^(-2)for P18k,and further to 9.7μW·m^(-1)·K^(-2)for P25k,followed by a slight decrease to 9.2μW·m^(-1)·K^(-2)for *** close Seebeck coefficients(S)at PF_(max)are observed in these doped polymer films due to their consistent frontier orbital energy levels and Fermi *** main contribution to this PF_(max)evolution thus comes from the corresponding conductivities(σ).Theσvariation of the doped films can be rationally correlated with their microstructure evolution.

关键词： conjugated polymer molecular weight microstructure thermoelectric performance

Transcriptome-based analysis of key signaling pathways affecting the formation of primordial germ cell in chickens

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Journal of Integrative Agriculture 2024年第5期23卷 1644-1657页

作者： Ying Ding Qiong Zhi qisheng Zuo Kai Jin Wei Han Bichun li Key Laboratory of Animal Genetics Breeding and Molecular Design of Jiangsu ProvinceCollege of Animal Science and TechnologyYangzhou UniversityYangzhou 225009China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China Yangzhou UniversityYangzhou225009China Poultry Research Institute Chinese Academy of Agricultural Sciences/Jiangsu Institute of Poultry ScienceYangzhou 225009China

Bone morphogenetic protein 4(BMP4)can induce the formation of chicken primordial germ cells(PGCs)in vitro;however,its regulatory mechanism in poultry remains *** study aimed to use RNA-seq to analyze PGCs in chicken embryos and iPGCs induced by BMP4 in vitro,clarify the internal regulatory factors of PGCs,analyze the mechanism of the formation of PGCs,and lay a theoretical foundation for the further optimization of PGCs induction *** stem cells(ESCs),PGCs and iPGCs induced by BMP4 in vitro were *** transcriptional maps of the three cell types were studied using *** results showed 6,142 genes differentially expressed between PGCs and iPGCs,of which 2,728 were upregulated in iPGCs and 3,414 were downregulated in *** to that in ESCs,BMP4 was significantly upregulated in PGCs and *** results showed that both the TGF-βand Wnt signaling pathways were activated during the formation of PGCs in vitro and in vivo,and the activation was more significant during iPGCs induced by *** expression of Nodal,an inhibitory factor of TGF-βsignaling,was significantly decreased in PGCs and iPGCs,but was not expressed in iPGCs,which further supports our ***,the Lysosome and PI3K-AKT signaling pathways were significantly enriched in PGCs and iPGCs,***,transmission electron microscopy(TEM)results showed that the number of autolysosomes was significantly higher after the addition of BMP4,which is consistent with the KEGG ***,the number of PGCs was significantly reduced after ATG14 was interfered in vivo and in *** conclusion,this study screened out the key signaling pathways during the formation of PGCs,aiming to provide help for enriching the mechanism network regulating PGCs formation in chicken and laying a theoretical foundation for further improving the efficiency of inducing PGCs in vitro.

关键词： RNA-seq BMP4 PGCs ATG14 chicken

Scheme Based on Multi-Level Patch Attention and Lesion Localization for Diabetic Retinopathy Grading

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 409-430页

作者： Zhuoqun Xia Hangyu Hu Wenjing li qisheng Jiang Lan Pu Yicong Shu Arun Kumar Sangaiah School of Computer and Communication Engineering Changsha University of Science and TechnologyChangshaChina Hunan Province People’s Hospital(The First Affiliated Hospital of Hunan Normal University) ChangshaChina The First Affiliated Hospital of Guangxi Medical University NanningChina International Graduate Institute of AI National Yunlin University of Science and TechnologyYunlinChina Department of Electrical and Computer Engineering Lebanese American UniversityBayrutLebanon

Early screening of diabetes retinopathy(DR)plays an important role in preventing irreversible *** research has failed to fully explore effective DR lesion information in fundus ***,traditional attention schemes have not considered the impact of lesion type differences on grading,resulting in unreasonable extraction of important lesion ***,this paper proposes a DR diagnosis scheme that integrates a multi-level patch attention generator(MPAG)and a lesion localization module(LLM).Firstly,MPAGis used to predict patches of different sizes and generate a weighted attention map based on the prediction score and the types of lesions contained in the patches,fully considering the impact of lesion type differences on grading,solving the problem that the attention maps of lesions cannot be further refined and then adapted to the final DR diagnosis ***,the LLM generates a global attention map based on ***,the weighted attention map and global attention map are weighted with the fundus map to fully explore effective DR lesion information and increase the attention of the classification network to lesion *** paper demonstrates the effectiveness of the proposed method through extensive experiments on the public DDR dataset,obtaining an accuracy of 0.8064.

关键词： DDR dataset diabetic retinopathy lesion localization multi-level patch attention mechanism

Gypenosides ameliorate morphine-induced immunosuppression with an increased proportion of thymic T lymphocyte subsets and are involved in the regulation of the cAMP-CREM/CREB-IL-2 pathway

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Genes & Diseases 2024年第3期11卷 120-123页

作者： Hui Wang Zhonghao li qisheng Wang Weixin lin Ziting Zhou Xinru Mu Yongwei Jiang Shengfeng Lu Shaodong Chen Zhigang Lu Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor Nanjing University of Chinese MedicineNanjingJiangsu 210023China Key Laboratory of Acupuncture and Medicine Research of Ministry of Education Nanjing University of Chinese MedicineNanjingJiangsu 210023China College of Pharmacy Nanjing University of Chinese MedicineNanjingJiangsu 210023China School of Medicine Xiamen UniversityXiamenFujian 361102China

Opioid abuse can suppress the lymphatic system function,and produce severe immunosuppression that poses a significant risk of opportunistic infections such as methicillinresistant Staphylococcus aureus(MRSA)pneumonia.^(1,2)Gypenosides(Gps)are the most important immunomodulator components in the Chinese herbal medicine Gynostemma pentaphyllum.

关键词： herbal Gypenosides immunosuppression

MAL2 DNA methylation serves as a biomarker for the diagnosis and prognosis of glioma

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Genes & Diseases 2024年第5期11卷 36-39页

作者： Hao Luo Xing Xiao Weiliang Hou Jing Cai Ming Chen qisheng Tang Yusheng Tong Zengxin Qi Kaicheng li liang Chen Department of Neurosurgery Huashan HospitalShanghai Medical CollegeState Key Laboratory of Medical NeurobiologyMOE Frontiers Center for Brain Science and Institutes of Brain ScienceFudan UniversityShanghai 200040China National Center for Neurological Disorders Shanghai 200040China Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration Shanghai 200040China Tianqiao and Chrissy Chen Institute Clinical Translational Research Center Shanghai 200040China Shanghai QuietD Biotechnology Co. Ltd.Shanghai 201210China

Glioma is a common and malignant brain tumor,and molecular diagnostics for glioma have received increasing attention.1,2 Previous studies have suggested that the MAL2 gene may be involved in the transcytosis of various cancers.3 This study aimed to investigate the potential of MAL2 as a biomarker for *** candidate MAL2 CpG sites were validated by pyrosequencing and used to construct a diagnostic model for *** analysis was also conducted to determine the relationship between highly methylated MAL2-specific CpG sites and the prognosis of *** findings also showed that MAL2 was more highly methylated in glioma than in other *** constructed diagnostic model can distinguish glioma from other cancers with high sensitivity(93.3%)and specificity(86.5%).Additionally,a risk score model was built based on MAL2 methylation to assess the prognosis of glioma。

关键词： glioma diagnosis MAL