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Neural Tucker Factorization
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作者 Peng Tang Xin Luo 《IEEE/CAA Journal of Automatica Sinica》 2025年第2期475-477,共3页
Dear Editor,This letter presents a novel latent factorization model for high dimensional and incomplete (HDI) tensor, namely the neural Tucker factorization (Neu Tuc F), which is a generic neural network-based latent-... Dear Editor,This letter presents a novel latent factorization model for high dimensional and incomplete (HDI) tensor, namely the neural Tucker factorization (Neu Tuc F), which is a generic neural network-based latent-factorization-of-tensors model under the Tucker decomposition framework. 展开更多
关键词 neu tuc f neural tucker factorization latent factorization model high dimensional tensor tucker decomposition framework neural network incomplete tensor latent factorization
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Symmetry-Constrained Anomalous Transport in the Altermagnetic Material CuX_(2)(X=F,Cl)
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作者 Zhengxuan Wang Ruqian Wu +6 位作者 Chunlan Ma Shijing Gong Chuanxi Zhao Shuaikang Zhang Guangtao Wang Tianxing Wang Yipeng An 《Chinese Physics Letters》 2025年第8期175-184,共10页
Altermagnetism,a recently identified class of collinear magnetism,combines key features of antiferromagnets and ferromagnets.Despite having zero net magnetization,altermagnetic materials exhibit anomalous transport ef... Altermagnetism,a recently identified class of collinear magnetism,combines key features of antiferromagnets and ferromagnets.Despite having zero net magnetization,altermagnetic materials exhibit anomalous transport effects,including the anomalous Hall,Nernst,and thermal Hall effects,as well as magneto-optical Kerr and Faraday effects.These phenomena,previously thought unique to ferromagnets,are dictated by symmetry,as confirmed by density functional theory(DFT)calculations.However,an effective model-based approach to verify these symmetry constraints remains unavailable.In this Letter,we construct a k·ρ model for d-wave altermagnets CuX_(2)(X=F,Cl)using spin space group representations and apply it to calculate the anomalous Hall effect.The symmetry-imposed transport properties predicted by the model are in agreement with the DFT results,providing a foundation for further investigation into symmetry-restricted transport phenomena in altermagnetic materials. 展开更多
关键词 altermagnetic materials d wave altermagnetism symmetry constrained anomalous transport Cu f Cl anomalous hall effect density functional theory transport effectsincluding faraday effectsthese
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Early Spatiotemporal Dynamic of Green Fluorescent Protein-Tagged Fusarium oxysporum f.sp.batatas in Susceptible and Resistant Sweet Potato
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作者 Hong Zhang Ying Zhu +8 位作者 Xingyu Li Zhonghua Liu Guoliang Li Zhaomiao Lin Yongxiang Qiu Yongqing Xu Shimin Lyu Jiyang Wang Sixin Qiu 《Phyton-International Journal of Experimental Botany》 2025年第8期2479-2498,共20页
Vascular wilt caused by Fusarium oxysporum f.sp.batatas(Fob)is a devastating disease threatening global sweet potato production.To elucidate Fob’s pathogenicitymechanisms and informeffective control strategies,we gen... Vascular wilt caused by Fusarium oxysporum f.sp.batatas(Fob)is a devastating disease threatening global sweet potato production.To elucidate Fob’s pathogenicitymechanisms and informeffective control strategies,we generated a green fluorescent protein(GFP)-tagged Fob strain to track infection dynamics in sweet potato susceptible cultivar Xinzhonghua and resistant cultivar Xiangshu75-55,respectively.Through cytological observation,we found in the susceptible Xinzhonghua,Fob predominantly colonized stem villi,injured root growth points,and directly invaded vascular bundles through stemwounds.Spore germination peaked at 2-3 h post-inoculation(hpi),followed by cyclical mycelial expansion and sporulation within vascular tissues with sustaining infection.In contrast,the resistant Xiangshu75-55 exhibited strong suppression of Fob:spores rarely germinated in vascular bundles or on trichomes by 3 hpi,and mature hyphae were absent in stems at 24 hpi.Quantitative reverse transcription PCR(qRT-PCR)confirmed significantly higher Fob biomass in Xinzhonghua than in Xiangshu75-55 by 16 hpi.Additionally,transcriptional profiling revealed distinct pathogen-host interactions during the compatible and incompatible reactions.In Xinzhonghua,Fob virulence genes FobPGX1,FobICL1,FobCTF2,FobFUB5 and FobFUB6 were upregulated within 16 hpi.Conversely,host defense genes IbMAPKK9,IbWRKY61,IbWRKY75,IbSWEET10,IbBBX24 and IbPIF4 were activated in Xiangshu75-55 during the same period.This study provides spatiotemporal cytological and molecular insights into Fob pathogenicity and host resistance,offering a foundation for early disease detection and improved Fusarium wilt management in sweet potato. 展开更多
关键词 fusarium wilt of sweet potato fusarium oxysporum f.sp.batatas infection green fluorescent protein compatibility TRICHOME
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YOLO-based lightweight traffic sign detection algorithm and mobile deployment
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作者 WU Yaqin ZHANG Tao +2 位作者 NIU Jianjun CHANG Yan LIU Ganjun 《Optoelectronics Letters》 2025年第4期249-256,共8页
This paper proposes a lightweight traffic sign detection system based on you only look once(YOLO).Firstly,the classification to fusion(C2f)structure is integrated into the backbone network,employing deformable convolu... This paper proposes a lightweight traffic sign detection system based on you only look once(YOLO).Firstly,the classification to fusion(C2f)structure is integrated into the backbone network,employing deformable convolution and bi-directional feature pyramid network(BiFPN)_Concat to improve the adaptability of the network.Secondly,the simple attention module(SimAm)is embedded to prioritize key features and reduce the complexity of the model after the C2f layer at the end of the backbone network.Next,the focal efficient intersection over union(EloU)is introduced to adjust the weights of challenging samples.Finally,we accomplish the design and deployment for the mobile app.The results demonstrate improvements,with the F1 score of 0.8987,mean average precision(mAP)@0.5 of 98.8%,mAP@0.5:0.95 of 75.6%,and the detection speed of 50 frames per second(FPS). 展开更多
关键词 c f layer simple attention module simam reduce complexity traffic sign detection prioritize key features backbone networkemploying classification backbone networknextthe
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放射性核素药物^(18)F-FAPI与^(18)F-FDG在肝恶性肿瘤PET/CT显像中的应用比较
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作者 吴娜静 李庆波 +4 位作者 陈礼平 王全鹏 葛雨秋 郁春景 贺慧慧 《中国现代应用药学》 北大核心 2025年第18期3126-3133,共8页
目的 比较评价^(18)F-FAPI PET/CT与^(18)F-FDG PET/CT在肝脏恶性肿瘤中的诊断效能,对比分析2种显像剂的最大标准摄取值(SUV_(max)),探讨其在肝脏恶性肿瘤中的诊断价值。方法 研究分析2023年2月至2023年7月于江南大学附属医院行^(18)F-F... 目的 比较评价^(18)F-FAPI PET/CT与^(18)F-FDG PET/CT在肝脏恶性肿瘤中的诊断效能,对比分析2种显像剂的最大标准摄取值(SUV_(max)),探讨其在肝脏恶性肿瘤中的诊断价值。方法 研究分析2023年2月至2023年7月于江南大学附属医院行^(18)F-FAPI-04 PET/CT与^(18)F-FDG PET/CT检查的20例患者(其中男性16例、女性4例,中位年龄65岁)的临床及影像资料。20例患者分别行^(18)F-FAPI-04 PET/CT与^(18)F-FDG PET/CT,显像间隔时间≤7 d。入组病例以组织病理学作为最终诊断的金标准;对于组织学诊断不适用的病例,以影像学随访判断是否存在肝脏恶性肿瘤。比较2种显像剂的PET/CT影像学表现,采用Wilcoxon signed-rank test比较^(18)F-FAPI PET/CT与^(18)F-FDG PET/CT显像SUV_(max)、肿瘤代谢体积(metabolic tumor volume, MTV)、病灶糖酵解总量(total lesion glycolysis, TLG)、病灶FAP摄取总量(total lesion FAP uptake,TLF)之间的差异性;通过Kappa检验评价2位观察者识别病灶区域的一致性;通过SUV_(max)[M(P25,75)]的Wilcoxon配对秩和检验评价1、2 h显像的图像对比度及相关性。结果^(18)F-FAPI PET/CT与^(18)F-FDG PET/CT在18例阳性病变(原发性9例、转移性9例)中的SUV_(max)分别为11.74(7.65, 15.51)、 8.05(4.91, 10.33),差异具有统计学意义(z=-2.461、P=0.014);在9例肝脏原发性病变中的SUV_(max)分别为13.06(7.30,18.22)、5.94(3.01,8.82),差异具有统计学意义(z=-2.429、P=0.015);在9例肝脏转移性病变中的SUV_(max)分别为10.42(7.70,14.17)、10.16(6.53,13.86),差异无统计学意义(z=-0.533、P=0.594)。18例阳性病变(原发性9例、转移性9例)的肿瘤代谢体积参数MTV4.0分别为29.29(3.41,34.72)、18.02(0.85,31.05),差异有统计学意义(z=-2.243、P=0.025);TLF4.0分别为208.73(19.49,262.61)、111.48(3.73,213.38),差异有统计学意义(z=-2.373、 P=0.018);9例肝脏原发性病变TLF2.5分别为337.06(78.41, 462.48)、191.25(10.41,352.41),差异有统计学意义(z=-2.073、P=0.048);肝脏原发性病变TLF3.0分别为307.95(55.89,393.50)、160.46(0.05,279.24),差异有统计学意义(z=-2.429、P=0.015);9例肝脏转移性病变在不同固定阈值及百分比阈值MTV与TLF之间的比较,差异均无统计学意义。2位观察者对肝脏病灶视觉分析一致性为100%,Kappa=1.000,z=4.88、P<0.001。2位观察者对肝脏病灶数量一致性为88.89%,Kappa=0.825 2,z=5.36、P<0.001;FDG显像分析一致性为88.89%,Kappa=0.826 9,z=6.24、P<0.001。1、2 h显像的图像对比度无明显统计学差异(P=0.128 9);1 h SUV_(max)和2 h SUV_(max)之间Pearson相关系数为0.792 8,P<0.05,表明两者具有显著相关性。结论^(18)F-FAPI在肝脏原发性病变中显示出较高的靶本底比值,可以弥补^(18)F-FDG PET/CT在检测原发性肝癌方面的不足。因此,FAPI在肝脏肿瘤中的高选择性摄取可能为肿瘤的无创性诊断、分期以及肿瘤治疗疗效监测开辟新的应用领域。 展开更多
关键词 ^(18)f-fAPI ^(18)f-fDG 肝脏恶性肿瘤 PET/CT 成纤维细胞激活蛋白
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HFSS软件在天线设计教学中的应用
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作者 牛芳琳 吕星 于玲 《实验室科学》 2025年第4期133-137,共5页
为了加深通信专业学生对“天线技术”理论及设计的理解,提出了一种基于HFSS软件的实验教学方法。此方法结合教学理论知识来设计实验内容,利用HFSS软件建立天线模型并运行仿真,使学生能够直观地观察到天线设计的结构及运行结果。该教学... 为了加深通信专业学生对“天线技术”理论及设计的理解,提出了一种基于HFSS软件的实验教学方法。此方法结合教学理论知识来设计实验内容,利用HFSS软件建立天线模型并运行仿真,使学生能够直观地观察到天线设计的结构及运行结果。该教学方法的操作过程简便,且能够使学生清晰地理解天线的各项参数及其对性能的影响。通过这种实践操作,学生不仅能够掌握分析天线性能的技能,还能在一定程度上培养出设计天线的基本能力,符合国家对新工科学生培养的期望和要求。 展开更多
关键词 HfSS软件 f天线 增益方向图 电压驻波比
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基于Relief-F特征优选的滑坡影响因子提取及易发性建模分析
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作者 方露 邢尹 《测绘通报》 北大核心 2025年第6期90-96,共7页
为解决现有滑坡易发性评价模型精度不足和单一决策模型局限性的问题,本文提出了一种集成智能组合算法优化RF的PSO-GA-RF集成模型。采用著名的过滤式特征选择方法——Relief-F算法,对滑坡致灾因子进行权重排序,剔除冗余特征,优化分类结果... 为解决现有滑坡易发性评价模型精度不足和单一决策模型局限性的问题,本文提出了一种集成智能组合算法优化RF的PSO-GA-RF集成模型。采用著名的过滤式特征选择方法——Relief-F算法,对滑坡致灾因子进行权重排序,剔除冗余特征,优化分类结果,从而减少了依赖主观判断提取影响因子的问题,降低了人为误差。PSO-GA-RF集成模型融合了多种算法的优势,对RF模型的参数进行优化,简化了参数选择的烦琐过程,减小了误差。试验结果表明,PSO-GA-RF集成模型在预测性能和效率上均优于RF和GA-RF模型。 展开更多
关键词 滑坡 易发性 影响因子 Relief-f PSO-GA-Rf
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利多卡因通过FOXO1/miR-203b/Cacna1f信号轴在带状疱疹后遗神经痛中的作用机制
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作者 郑颖 周武碧 +1 位作者 王祥 戴京京 《西北药学杂志》 2025年第1期38-45,共8页
目的研究带状疱疹病毒(varicella-zoster virus,VZV)感染神经后,利多卡因通过FOXO1/miR-203b/Cacna1f信号轴在后遗神经痛中的作用机制。方法构建VZV感染的大鼠带状疱疹后遗神经痛(post herpetic neuralgia,PHN)动物模型,造模成功后,检... 目的研究带状疱疹病毒(varicella-zoster virus,VZV)感染神经后,利多卡因通过FOXO1/miR-203b/Cacna1f信号轴在后遗神经痛中的作用机制。方法构建VZV感染的大鼠带状疱疹后遗神经痛(post herpetic neuralgia,PHN)动物模型,造模成功后,检测SD大鼠背跟神经节在感染VZV后的差异基因表达水平,结合生物信息学分析与疼痛相关的基因FOXO1(保护性)、Cacna1f(钙离子通道蛋白)和miRNA(Targetscan数据库分析并进行Realtime PCR验证),并利用双荧光素酶报告基因验证上、下游调控靶点。同时检测利多卡因组FOXO1、Cacna1f和miRNA的表达情况。结果SD大鼠PHN造模成功,且共鉴定出差异表达基因89个。生物信息分析结果显示,VZV感染后,FOXO1的表达下调,Cacna1f的表达上调;而利多卡因治疗组与VZV感染组比较,FOXO1的表达上调,Cacna1f的表达下调。Targetscan数据库分析结果显示,Cacna1f基因具有6个miRNA的结合位点,且仅有miR-203b的表达水平显著下降。通过双荧光素酶报告基因发现,在PHN中FOXO1对miR-203b具有转录调控作用,同时miR-203b可靶向于Cacna1f分子。结论FOXO1/miR-203b/Cacna1f信号轴在PHN中起重要的疼痛信号传递作用,利多卡因可通过作用于该轴减弱疼痛信号的转导,FOXO1/miR-203b/Cacna1f信号轴可以作为治疗PHN的靶点通路。 展开更多
关键词 带状疱疹后遗神经痛(PHN) 利多卡因 生物信息学 缩足阈值 差异表达基因 fOXO1 Cacna1f miR-203b
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肝细胞癌组织中FOXF1、FCRL5表达及与患者临床病理特征和预后的关系
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作者 周林 向世春 +1 位作者 鲜成萼 张铁泉 《肝胆外科杂志》 2025年第2期149-154,共6页
目的分析肝细胞癌(HCC)组织中叉头盒F1(FOXF1)、Fc受体样5(FCRL5)表达及与患者临床病理特征和预后的关系。方法选择2019年1月至2021年12月本院收治的HCC患者80例,根据患者的预后情况将患者分为生存组和死亡组。采用免疫组化法检测癌组... 目的分析肝细胞癌(HCC)组织中叉头盒F1(FOXF1)、Fc受体样5(FCRL5)表达及与患者临床病理特征和预后的关系。方法选择2019年1月至2021年12月本院收治的HCC患者80例,根据患者的预后情况将患者分为生存组和死亡组。采用免疫组化法检测癌组织与癌旁组织中FOXF1、FCRL5表达;Spearman分析HCC癌组织中FOXF1、FCRL5的相关性;HCC癌组织FOXF1、FCRL5表达与预后的关系采用Kaplan-Meier生存曲线完成;预后不良的影影响因素采用COX回归完成。结果癌组织的FOXF1、FCRL5阳性表达率较高(P<0.05);Spearman分析显示,HCC患者癌组织中FOXF1、FCRL5呈正相关;癌组织FOXF1、FCRL5阳性表达患者肿瘤数目、分化程度、TNM分期、肿瘤最大直径与阴性表达患者比较差异显著(P<0.05);死亡组FOXF1、FCRL5阳性表达率均高于生存组(P<0.05);Kaplan-Meier生存曲线显示,FOXF1、FCRL5阳性表达患者3年生存率均低于阴性表达患者(P<0.05);多因素COX回归分析显示,TNM分期、FOXF1、FCRL5表达是HCC患者预后不良的影响因素(P<0.05)。结论在HCC癌组织中FOXF1、FCRL5呈现高表达,且两个指标均与临床病理特征和预后密切相关。 展开更多
关键词 肝细胞癌 叉头盒f1 fc受体样5 临床病理特征 预后
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[^(18)F]F-FMISO和[^(18)F]F-FLT PET/CT双核素显像预测胰腺癌耐药性的体内研究 被引量:1
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作者 孙晨玮 海汪溪 +1 位作者 屈骞 席云 《上海交通大学学报(医学版)》 北大核心 2025年第1期60-68,共9页
目的:[^(18)F]氟代甲基咪唑([^(18)F]fluormisonidazole,[^(18)F]F-FMISO)和[^(18)F]氟代脱氧胸腺嘧啶核苷([^(18)F]fluorothymidine,[^(18)F]F-FLT)分别是乏氧微环境及细胞增殖状态的特异性PET分子显像剂。该研究拟通过[^(18)F]F-FMISO... 目的:[^(18)F]氟代甲基咪唑([^(18)F]fluormisonidazole,[^(18)F]F-FMISO)和[^(18)F]氟代脱氧胸腺嘧啶核苷([^(18)F]fluorothymidine,[^(18)F]F-FLT)分别是乏氧微环境及细胞增殖状态的特异性PET分子显像剂。该研究拟通过[^(18)F]F-FMISO和[^(18)F]F-FLT PET/CT双核素显像可视化监测胰腺癌耐药性对上述2种状态影响的变化规律,为临床转化提供理论依据。方法:采用CCK-8实验验证胰腺癌耐药细胞株PANC-1/R(PR)相对于亲代细胞株PANC-1(P)的耐药性。BALB/c雄性裸鼠左侧腋窝皮下接种胰腺癌细胞建立皮下移植瘤模型。设置亚组,分别为接种肿瘤细胞后第12天、第18天开始给予吉西他滨(gemcitabine,GEM)化疗(12D-G组和18D-G组)。于治疗前后同期行[^(18)F]F-FMISO和[^(18)F]F-FLT PET/CT显像,获得半定量指标(maximum standardized uptake value,SUV_(max)),计算ΔSUV_(max)=(第二次显像SUV_(max)-第一次显像SUV_(max))/第一次显像SUV_(max)。通过勾画受试者工作特征曲线(receiver operating characteristic curve,ROC)获得各半定量参数判断胰腺癌耐药性的最佳阈值。结果:CCK-8实验证实PR具有对GEM的高度耐药性,耐药指数为4.24(n=5)。体内实验通过对比肿瘤生长速率和生存分析证实,亲代胰腺癌早期给予GEM化疗抑制肿瘤生长更显著,延长了生存时间(12D-G组,P=0.025),而耐药胰腺癌给予GEM化疗加速肿瘤生长,生存时间缩短(18D-G和12D-G,均P=0.025)。其次,非化疗组ΔSUV_(max)-FLT与生存时间呈负相关;化疗组ΔSUV_(max)-FMISO和ΔSUV_(max)-FLT与生存时间均呈负相关(P=0.050,P=0.006);18D-G化疗组第二次显像P肿瘤的ΔSUV_(max)-FMISO和ΔSUV_(max)-FLT明显低于PR肿瘤(P=0.045,P=0.050);12D-G化疗组第二次显像P肿瘤的ΔSUV_(max)-FLT略低于PR肿瘤(P=0.051)。ROC判断胰腺癌耐药性的最佳阈值:非化疗组ΔSUV_(max)-FLT=0.45时,灵敏度和特异度为100.00%、50.00%;化疗组ΔSUV_(max)-FMISO=0.37、ΔSUV_(max)-FLT=0.36时,灵敏度和特异度为100.00%、83.33%。结论:[^(18)F]F-FMISO和[^(18)F]F-FLT PET/CT双核素显像可用于评估胰腺癌耐药性,化疗前后比较[^(18)F]F-FMISO与[^(18)F]F-FLT PET差值对预测胰腺癌耐药性和生存时间的准确性最佳。 展开更多
关键词 胰腺癌 耐药 [^(18)f]f-fMISO 乏氧微环境 [^(18)f]f-fLT 细胞增殖
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F1–the crucible of innovation for BTMA members
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《China Textile》 2025年第2期38-39,共2页
Fibre and fabric production technologies-especially in the area of com-posite reinforcements-have played an as-yet largely unheralded role in thedevelopment of the UKs Formula One industry,but the British Textile Mach... Fibre and fabric production technologies-especially in the area of com-posite reinforcements-have played an as-yet largely unheralded role in thedevelopment of the UKs Formula One industry,but the British Textile MachineryAssociation(BTMA)aims to change that. 展开更多
关键词 INNOVATION PRODUCTION fibre fabric production fABRIC MEMBERS btma CRUCIBLE f
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REMAINING-LIFETIME AGE-STRUCTURED BRANCHING PROCESSES
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作者 Ziling CHENG Zenghu LI 《Acta Mathematica Scientia》 2025年第3期1107-1136,共30页
We study age-structured branching models with reproduction law depending on the remaining lifetime of the parent. The lifespan of an individual is determined at its birth and its remaining lifetime decreases at the un... We study age-structured branching models with reproduction law depending on the remaining lifetime of the parent. The lifespan of an individual is determined at its birth and its remaining lifetime decreases at the unit speed. The models, without or with immigration, are constructed as measure-valued processes by pathwise unique solutions of stochastic equations driven by time-space Poisson random measures. In the subcritical branching case, we give a sufficient condition for the ergodicity of the process with immigration. Two large number laws and a central limit theorem of the occupation times are proved. 展开更多
关键词 branching process remaining lifetime IMMIGRATION stochastic equation ergod-icity occupation time large number law central limit theorem MSC202060J80 60J85 60H15 60f15 60f05
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Degradation of bisphenol F by peroxymonosulfate activated with palladium-based catalysts
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作者 Xiaomei Zhou Minghui Li +4 位作者 Jifei Hou Jingya Sun Shourong Zheng Yingjun Chen Qingxin Guan 《Journal of Environmental Sciences》 2025年第4期54-65,共12页
In this study,supported Pd catalysts were prepared and used as heterogeneous catalysts for the activation of peroxymonosulfate(PMS)which successfully degrade bisphenol F(BPF).Among the supported catalysts(i.e.,Pd/SiO_... In this study,supported Pd catalysts were prepared and used as heterogeneous catalysts for the activation of peroxymonosulfate(PMS)which successfully degrade bisphenol F(BPF).Among the supported catalysts(i.e.,Pd/SiO_(2),Pd/CeO_(2),Pd/TiO_(2)and Pd/Al2O3),Pd/TiO_(2)exhibited the highest catalytic activity due to the high isoelectric point and high Pd0 content.Pd/TiO_(2)prepared by the deposition method leads to high Pd dispersion,which are the key factors for efficient BPF degradation.The influencing factors were investigated during the reaction process and two possible degradation pathways were proposed.Density functional theory(DFT)calculations demonstrate that stronger BPF adsorption and BPF degradation with lower reaction barrier occurs on smaller Pd particles.The catalytic activities are strongly dependent on the structural features of the catalysts.Both experiments and theoretical calculations prove that the reaction is actuated by electron transfer rather than radicals. 展开更多
关键词 Supported Pd catalysts Peroxymonosulfate activation Bisphenol f DfT calculations Mechanism
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FEV-YOLOv8n:轻量化安全帽佩戴检测方法 被引量:3
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作者 韩博 张婧婧 鲁子翱 《计算机测量与控制》 2025年第1期69-77,84,共10页
针对基线YOLOv8n检测算法结构较复杂以及现有的安全帽佩戴检测算法参数量和计算量较大,难以在终端部署等问题,提出一种基于FEV-YOLOv8n的轻量化检测模型;设计一种轻量级的FasterC2f模块改进YOLOv8n的骨干网络,实现网络的参数量和计算量... 针对基线YOLOv8n检测算法结构较复杂以及现有的安全帽佩戴检测算法参数量和计算量较大,难以在终端部署等问题,提出一种基于FEV-YOLOv8n的轻量化检测模型;设计一种轻量级的FasterC2f模块改进YOLOv8n的骨干网络,实现网络的参数量和计算量的降低;在FasterC2f模块中引入EMA注意力机制,融合空间依赖和位置信息,建立长短期的依赖关系,增强对目标表征的关注,以提高模型检测的精度;使用VoVGSCSP模块改进颈部网络,提高遮挡目标以及小目标的辨识度;实验结果表明,改进YOLOv8n模型map值为92.5%,相较于YOLOv8n算法,模型大小减少20%,计算量降低18.5%,参数量降低15.7%,为安全帽佩戴检测的轻量化研究提供理论参考。 展开更多
关键词 目标检测 安全帽 fasterC2f 轻量化 Efficient Multi-Scale Attention VoVGSCSP
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Intervention and mechanism of Xiaoyin Anshen Yin(消银安神饮)in treatment of psoriasis combined with sleep disorders
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作者 DIAO Ruohan DUAN Xingwu +3 位作者 LI Lingling QU Tiange FENG Huishang CHEN Guangshan 《Journal of Traditional Chinese Medicine》 2025年第3期552-560,共9页
OBJECTIVE:To explore the therapeutic mechanisms of Xiaoyin Anshen Yin( 消银安神饮, XYAS) in treating psoriasis associated with sleep focusing on melatonin and the regulation of the nuclear factor kappa-B(NF-κB) pathw... OBJECTIVE:To explore the therapeutic mechanisms of Xiaoyin Anshen Yin( 消银安神饮, XYAS) in treating psoriasis associated with sleep focusing on melatonin and the regulation of the nuclear factor kappa-B(NF-κB) pathway. METHODS:Forty Sprague-Dawley rats were randomly divided into four groups, and administered distilled water, XYAS and its two different disassembly prescriptions by gavage respectively. Four types of drug-containing serums corresponding to the four groups were then prepared. Tumor necrosis factor(TNF)-α stimulated Ha Ca T was used to establish a psoriasis cell model, and the serums and the retinoid related orphan receptor alpha(RORα) inverse agonist were used respectively to intervene in the model. Enzyme-linked immunosorbent assay was used to detect the levels of interleukin(IL)-6 and melatonin in each group;flow cytometry was used to detect the levels of reactive oxygen species(ROS), mitochondrial membrane potential, and apoptosis;Western blot was used to evaluate the levels of superoxide dismutase 2(SOD2), cytochrome-c(Cyt-c), inhibitor of kappa-B alpha(IκBα), p65 and phosphorylated p65. RESULTS:XYAS and its disassembly prescriptions inhibited the secretion of inflammatory factors such as IL-6, reduced the ROS content and Cyt-c expression, increased the mitochondrial membrane potential and SOD2 content, promoted the apoptosis in Ha Ca T cells and inhibited the activation of the NF-κB pathway. XYAS was also found increase the melatonin content. The above effects are beneficial in the treatment of psoriasis combined with sleep disorders. Meanwhile, XYAS no longer had a significant ameliorative effect after applying the RORα inverse agonist, suggesting that the therapeutic effect of XYAS is related to RORα. CONCLUSIONS:The results of this study confirm that XYAS can be utilized for the treatment of psoriasis combined with sleep disorders via inhibiting the NF-κB pathway, anti-inflammatory, antioxidant and proapoptotic, which is in part related to the regulatory role of melatonin and its receptor RORα. 展开更多
关键词 PSORIASIS MELATONIN nuclear receptor subfamily 1 group f member 1 Nf-kappa B sleep disorder
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Aerodynamic analysis of rotor-to-rotor interactions in different octocopter configurations
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作者 Aqib AZIZ Yongjie SHI +1 位作者 Yang LIU Guohua XU 《Chinese Journal of Aeronautics》 2025年第3期292-315,共24页
Rotor-to-rotor interaction among neighboring rotors of a multirotor has great significance for aerodynamically efficient multirotor design. Current research is conducted to analyze aerodynamic performance of different... Rotor-to-rotor interaction among neighboring rotors of a multirotor has great significance for aerodynamically efficient multirotor design. Current research is conducted to analyze aerodynamic performance of different octocopter configurations amid hover and forward flight. Conventional and coaxial configurations are studied and a hybrid configuration is also proposed to rectify the disadvantages associated with the earlier two. Comparison is carried out for the aforementioned configurations along with comparison of coaxial and hybrid octocopters with bigger diameter rotors in the same confined space for high thrust requirement missions. Vertical spacing of coaxial configuration is also studied. Virtual Blade Method (VBM) is considered herein due to its great computational efficiency. The results show that there are 11.89% and 14.22% loss in thrust for coaxial octocopter compared to conventional and hybrid configurations with normal size rotors and 15.61% loss compared to hybrid configuration with bigger rotors in hover, whereas coaxial square configuration performs the worst in forward flight with a lift loss of 9.1%, 14.77% and 18.8% compared to coaxial diamond, conventional and hybrid configurations with normal size rotors and 9.96% and 17.82% loss compared to coaxial diamond and hybrid configurations with bigger rotors. Combined FM shows that hybrid configuration outperforms other octocopter configurations in overall aerodynamic performance. 展开更多
关键词 Rotor-to-rotor interaction Virtual blade method Octocopter configurations Aerodynamically efficient HOVER forward f1ight
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Two vicinal C(sp^(3))-F bonds functionalization of perfluoroalkyl halides (PFAHs)
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作者 Jun Jiang Hui Dai Tao Tu 《Chinese Chemical Letters》 2025年第7期4-5,共2页
Organofluorines play a crucial role in medicine,agrochemicals,and materials science.Adding fluorine to molecules creates structures with specific beneficial properties or tunes properties through interactions with the... Organofluorines play a crucial role in medicine,agrochemicals,and materials science.Adding fluorine to molecules creates structures with specific beneficial properties or tunes properties through interactions with their environment.Many popular pharmaceuticals and agrochemicals contain fluorine because it enhances hydrogen bonding at protein’s active sites. 展开更多
关键词 vicinal c sp f bonds materials science organofluorines medicine fluorine functionalization tunes properties agrochemicals enhances hydrogen bonding
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Global Carbon Monoxide Column Derived from HIRAS-II/FY-3F Satellite Observations
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作者 Minqiang ZHOU Yapeng WANG +5 位作者 Charles ROBERT Xingying ZHANG Lu ZHANG Zhili DENG Chengli QI Pucai WANG 《Advances in Atmospheric Sciences》 2025年第9期1776-1782,共7页
The Hyperspectral Infrared Atmospheric Sounder-II(HIRAS-II)onboard China’s FungYun(FY)-3F meteorological satellite was launched in August 2023.This study presents the first attempt to retrieve the global carbon monox... The Hyperspectral Infrared Atmospheric Sounder-II(HIRAS-II)onboard China’s FungYun(FY)-3F meteorological satellite was launched in August 2023.This study presents the first attempt to retrieve the global carbon monoxide(CO)column from HIRAS-II/FY-3F spectra based on a newly established full-physics algorithm.The CO global columns derived from the HIRAS-II/FY-3F satellite are compared to measurements from the Infrared Atmospheric Sounding Interferometer(IASI)onboard Europe’s MetopB satellite,as both satellites have the same spectral range with a similar overpass time.The correlation coefficient between the IASI/Metop-B and HIRAS-II/FY-3F CO retrievals is about 0.8.The HIRAS-II/FY-3F satellite can capture well the regions with high CO values,e.g.,Africa,North America,and East Asia.The relative difference in the CO global column between HIRAS-II and IASI is 1.2±13.7(1)%,which is within their combined retrieval uncertainty.The CO plumes from the fire emissions in North America between 18 and 23 July 2024 were observed by the HIRAS-II/FY-3F satellite and consistent with the CAMS(Copernicus Atmosphere Monitoring Service)model simulations.Our results show that the HIRAS-II/FY-3F spectra are of good enough quality to provide quantitative observations of global CO column remote sensing observations. 展开更多
关键词 carbon monoxide HIRAS-II/fY-3f hyper-spectral infrared remote sensing wildfire emission
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Climate Suitability Zoning of Morinda officinalis F. C. How and Sarcandra glabra (Thunb.) Nakai Planting in Xinfeng County Based on GIS
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作者 Jundao PAN Xizi PEI +2 位作者 Wenjian PAN Xiaoyun CHEN Jie GAO 《Meteorological and Environmental Research》 2025年第1期24-27,36,共5页
Based on the meteorological data of 24 automatic stations in Xinfeng County,combined with the climatic conditions for the growth of Morinda officinalis F.C.How and Sarcandra glabra(Thunb.)Nakai,the climate suitability... Based on the meteorological data of 24 automatic stations in Xinfeng County,combined with the climatic conditions for the growth of Morinda officinalis F.C.How and Sarcandra glabra(Thunb.)Nakai,the climate suitability zoning indicators of M.officinalis and S.glabra in Xinfeng County were constructed by relevant statistical methods,and the climate suitability zoning indicators were divided into four grades:most suitable,suitable,sub-suitable and unsuitable.According to the results of expert scores,the relevant growth impact factors were assigned weight values.Based on geographic information system(GIS),the climate suitability zoning of M.officinalis and S.glabra planting in Xinfeng County was carried out.The results show that most areas of Xinfeng County were suitable for planting M.officinalis and S.glabra.Among them,the most suitable planting areas of M.officinalis were mainly distributed in most of Huilong Town,from Jiangnan Community of Fengcheng Street to Yuntianhai area of Meikeng Town,Matouwantian Village and areas to the south,and areas to the south of Zhutong Village,Fengcheng Street.The most suitable areas for S.glabra planting were mainly distributed in Puchang Village of Huilong Town,the northeast of Huangzhai Town,the south of Fengcheng Street,and the central-southern part of Matou Town.The zoning results provide a scientific basis for the rational layout of M.officinalis and S.glabra planting in Xinfeng County. 展开更多
关键词 Morinda officinalis f.C.How Sarcandra glabra(Thunb.)Nakai Climate suitability Geographic information system Xinfeng County
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Radiosynthesis and preclinical evaluation of[^(18)F]AlF-labeled HBED-CC-FAPI derivatives for imaging of cancer-associated fibroblasts
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作者 Haiyan Hong Yan Zhang +3 位作者 Jinping Qiao Wensheng Zhang Lin Zhu Jiehua Xu 《Journal of Pharmaceutical Analysis》 2025年第2期484-487,共4页
Fibroblast activation protein(FAP)is overexpressed in cancer-associated fibroblasts across various cancer types.Numerous radiolabeled FAP inhibitors(FAPIs)(Fig.S1A)currently under clinical investigation have shown rem... Fibroblast activation protein(FAP)is overexpressed in cancer-associated fibroblasts across various cancer types.Numerous radiolabeled FAP inhibitors(FAPIs)(Fig.S1A)currently under clinical investigation have shown remarkable potential in cancer theranostics. 展开更多
关键词 RADIOSYNTHESIS cancer theranostics clinical investigation cancer associated fibroblasts preclinical evaluation f alf labeled hbed cc fapi derivatives fibroblast activation IMAGING
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