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Enhancing the high-temperature stability of OFETs by inducing D-A stacking in P(NDI2OD-T2) films

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Science China materials 2025年第1期68卷 117-124页

作者： Xuetao Xiao Wenhao Li Qing Zhou Zeng Wu Xiaochan Zuo Rong ma Yifei Xu Sichun Wang yan Zhao Laboratory of Molecular materials and Devices Department of Materials ScienceFudan UniversityShanghai 200433China State Key Laboratory of Molecular Engineering of Polymers and Department of macromolecular Science Fudan UniversityShanghai 200433China

High-temperature stability of organic field-effect transistors(OFETs)is critical to ensure its long-term reliable operation under various environmental *** molecular packing of donor-acceptor(D-A)conjugated polymers is closely related to the electrical performance stability in ***,we choose poly[[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)]as a modal system to reveal the relationship between the molecular stacking and electrical stability in high-temperature *** results demonstrate that the films with D-A moieties in alternate stacking have better electrical thermal stability compared to normal donor-donor(D-D)*** D-A stacking configuration alternates donor and acceptor units along the out-of-plane direction,while the D-D stacking involves D-D and A-A stacking *** structural transition from D-D to D-A is captured at a treated temperature range of 225±250°*** to the tighter packing arrangement along theπ-πand lamellar directions,the electron mobility of the D-A stacked films reaches up to 0.23 cm^(2)/V·s,a 50%increase as compared to the D-D stacking ***,the D-A stacked films indicate superior electrical performance stability with mobility retaining 100%at 250°C during high-temperature cycling *** result highlights that the manipulation of conjugated polymer closely stacked structures can significantly enhance the thermal stability and durability of semiconductor devices.

关键词： high-temperature stability D-A stacking P(NDI2OD-T2) electrical properties OFETs

数据要素对绿色物流效率的影响机制及效能研究

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商业经济研究 2025年第2期 79-82页

作者：麻见阳沈燕桂林航天工业学院管理学院广西桂林541004 西安理工大学经济与管理学院陕西西安710054

数据要素是推动绿色物流效率提升的关键因素,通过精准的数据分析,企业能优化物流路径,减少无效运输,提升运输效率。同时,数据有助于监控物流过程中的能源消耗和排放,促进绿色技术的应用,从而降低环境影响。基于此,本文选取2013-2022年我... 详细信息

数据要素是推动绿色物流效率提升的关键因素,通过精准的数据分析,企业能优化物流路径,减少无效运输,提升运输效率。同时,数据有助于监控物流过程中的能源消耗和排放,促进绿色技术的应用,从而降低环境影响。基于此,本文选取2013-2022年我国30个省份数据来探究数据要素对绿色物流效率的影响机制及效能,最终显示,数据要素可以直接促进绿色物流效率提升,同时数据要素也可以通过科技创新中介变量促进绿色物流效率发展。

关键词：数据要素绿色物流效率科技创新

可调式空气引射器的热流固耦合变形计算及强度分析

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汽轮机技术 2025年第1期67卷 17-20,62页

作者：闫利如马素霞太原理工大学电气与动力工程学院太原030024

以某可调式空气引射器为研究对象建立了有限元模型,基于Workbench软件,首先对内部流场进行数值模拟,分析了弯管和封头结构对引射器流场特性的影响,再通过稳态耦合计算,研究了引射器的耦合变形及应力分布,最后对引射器强度进行评定。结... 详细信息

以某可调式空气引射器为研究对象建立了有限元模型,基于Workbench软件,首先对内部流场进行数值模拟,分析了弯管和封头结构对引射器流场特性的影响,再通过稳态耦合计算,研究了引射器的耦合变形及应力分布,最后对引射器强度进行评定。结果表明:曲率半径为3 D的弯头内工作流体流动更均匀;锥形封头可以使两股流体更快混合,并有助于提升引射效率;该引射器在热流固耦合下的最大变形量为0.27mm,应力主要集中于喷嘴位置,最大应力值为311.8MPa,对比流固耦合下的应力分布,发现热载荷是造成应力的主要因素;经过强度评定,设备不会发生强度失效。本研究为可调式引射器的结构设计和强度分析提供了指导。

关键词：空气引射器数值模拟结构设计强度评定

The GECAM ground search system for gamma-ray transients

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 161-174页

作者： Ce Cai yan-Qiu Zhang Shao-Lin Xiong Ping Wang Jian-Hui Li Xiao-Bo Li Cheng-Kui Li Yue Huang Shi-Jie Zheng Li-Ming Song Shuo Xiao Qi-Bin Yi Yi Zhao Sheng-Lun Xie Rui Qiao yan-Qi Du Zhi-Wei Guo Wang-Chen Xue Chao Zheng Jia-Cong Liu Chen-Wei Wang Wen-Jun Tan Yue Wang Jin-Peng Zhang Chao-yang Li Guo-Ying Zhao Xiao-Yun Zhao Xiao-Lu Zhang Zhen Zhang Wen-Xi Peng Xiang ma Jing-yan Shi Dong-Ya Guo Jin Wang Xin-Qiao Li Xiang-yang Wen Zheng-Hua An Fan Zhang College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang050024China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China University of Chinese Academy of Sciences Beijing100049China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang550001China School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China School of Computer and Information Dezhou UniversityDezhou253023China Institute of Astrophysics Central China Normal UniversityWuhan430079China

In the era of time-domain,multi-messenger astronomy,the detection of transient events on the high-energy electromagnetic sky has become more important than *** gravitational wave high-energy electromagnetic counterpart all-sky monitor(GECAM)is a dedicated mission to monitor gamma-ray transients,launched in December,2020.A real-time on-board trigger and location software,using the traditional signal-to-noise ratio(SNR)method for blind search,is constrained to relatively bright signals due to the limitations in on-board computing resources and the need for real-time *** this work,we developed a ground-based pipeline for GECAM to search for various transients,especially for weak bursts missed by on-board *** pipeline includes both automatic and manual mode,offering options for blind search and targeted *** targeted search is specifically designed to search for interesting weak bursts,such as gravitational wave-associated gamma-ray bursts(GRBs).From the ground search of the data in the first year,GECAM has been triggered by 54 GRBs and other transients,including soft gamma-ray repeaters,X-ray binaries,solar flares,terrestrial gamma-ray *** report the properties of each type of triggers,such as trigger time and light *** this search pipeline and assuming a soft Band spectrum,the GRB detection sensitivity of GECAM is increased to about 1.1×10^(-8)erg cm^(-2)s^(-1)(10-1000 ke V,burst duration of 20 s).These results demonstrate that the GECAM ground search system(both blind search and targeted search)is a versatile pipeline to recover true astrophysical signals which were too weak to be found in the on-board search.

关键词： gamma-ray sources gravitational waves data analysis gamma-ray telescopes

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Construction of attapulgite-based one-dimensional nanonetwork composites with corrosion resistance for high-efficiency microwave absorption

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 689-698页

作者： Kai Xu Qingqing Gao Shaoqi Shi Pei Liu Yinxu Ni Zhilei Hao Gaojie Xu yan Fu Fenghua Liu School of materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Key Laboratory of Additive manufacturing materials Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Northwest Yongxin Coatings Limited Company Lanzhou 730046China

Exploring high-efficiency and broadband microwave absorption(ma)materials with corrosion resistance and low cost is ur-gently needed for wide practical ***,the natural porous attapulgite(ATP)nanorods embedded with TiO_(2)and polyaniline(PANI)nanoparticles are synthesized via heterogeneous precipitation and in-situ *** obtained PANI-TiO_(2)-ATP one-di-mensional(1D)nanostructures can intertwine into three-dimensional(3D)conductive network,which favors energy *** min-imum reflection loss(RL_(min))of the PANI-TiO_(2)-ATP coating(20wt%)reaches-49.36 dB at 9.53 GHz,and the effective absorption band-width(EAB)can reach 6.53 GHz with a thickness of 2.1 *** excellent ma properties are attributed to interfacial polarization,mul-tiple loss mechanisms,and good impedance matching induced by the synergistic effect of PANI-TiO_(2)nanoparticle shells and ATP *** addition,salt spray and Tafel polarization curve tests reveal that the PANI-TiO_(2)-ATP coating shows outstanding corrosion resist-ance *** study provides a low-cost and high-efficiency strategy for constructing 1D nanonetwork composites for ma and corrosion resistance applications using natural porous ATP nanorods as carriers.

关键词： microwave absorption corrosion resistance attapulgite TiO_(2) polyaniline

CT whole lung radiomic nomogram:a potential biomarker for lung function evaluation and identification of COPD

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Military Medical Research 2025年第1期12卷 36-47页

作者： Tao-Hu Zhou Xiu-Xiu Zhou Jiong Ni yan-Qing ma Fang-Yi Xu Bing Fan Yu Guan Xin-Ang Jiang Xiao-Qing Lin Jie Li Yi Xia Xiang Wang Yun Wang Wen-Jun Huang Wen-Ting Tu Peng Dong Zhao-Bin Li Shi-Yuan Liu Li Fan Department of Radiology the Second Affiliated Hospital of Naval Medical UniversityShanghai 200003China School of Medical Imaging Shandong Second Medical UniversityWeifang 261053ShandongChina Department of Radiology School of MedicineTongji HospitalTongji UniversityShanghai 200065China Department of Radiology Zhejiang Province People’s HospitalAffiliated People’s Hospital of Hangzhou Medical CollegeHangzhou 310014China Department of Radiology Sir Run Run Shaw HospitalZhejiang 310018China Jiangxi Provincial People’s Hospital the First Affiliated Hospital of Nanchang Medical CollegeNanchang 330006China College of Health Sciences and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Radiology the Second People’s Hospital of DeyangDeyang 618000SichuanChina Department of Radiation Oncology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

Background:Computed tomography(CT)plays a great role in characterizing and quantifying changes in lung structure and function of chronic obstructive pulmonary disease(COPD).This study aimed to explore the performance of CT-based whole lung radiomic in discriminating COPD patients and non-COPD ***:This retrospective study was performed on 2785 patients who underwent pulmonary function examination in 5 hospitals and were divided into non-COPD group and COPD *** radiomic features of the whole lung volume were *** absolute shrinkage and selection operator(LASSO)logistic regression was applied for feature selection and radiomic signature construction.A radiomic nomogram was established by combining the radiomic score and clinical *** operating characteristic(ROC)curve analysis and decision curve analysis(DCA)were used to evaluate the predictive performance of the radiomic nomogram in the training,internal validation,and independent external validation ***:Eighteen radiomic features were collected from the whole lung volume to construct a radiomic *** area under the curve(AUC)of the radiomic model in the training,internal,and independent external validation cohorts were 0.888[95%confidence interval(CI)0.869–0.906],0.874(95%CI 0.844–0.904),and 0.846(95%CI 0.822–0.870),*** were higher than the clinical model(AUC were 0.732,0.714,and 0.777,respectively,Pmance and high accuracy in identifying COPD in this multicenter study.

关键词： Chronic obstructive pulmonary disease(COPD) Computed tomography(CT) Radiomic

Prediction of posthepatectomy liver failure in patients withhepatocellular carcinoma through ultrasound elastography

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World Journal of Gastroenterology 2025年第4期31卷 160-163页

作者： yan-Qing ma Xi-Ren Xu Jie Li Yi Lin Zheng Guan Department of Radiology Zhejiang Provincial People’s Hospital(Affiliated People’s HospitalHangzhou Medical College)Hangzhou 310014Zhejiang ProvinceChina

In this article,we comment on the article by Cheng et al published in *** liver failure(PHLF)remains a leading cause of hepatectomyrelated mortality and can be evaluated according to liver reserve *** stiffness(LS)measured by ultrasonic elastography and spleen area demonstrate a strong correlation with hepatic proliferation,fibrosis,and portal vein congestion,thus indirectly reflecting liver reserve *** article highlights a meticulous study aimed at investigating the potential of two-dimensional shear wave elastography in assessing LS,as well as its integration with spleen area,surgical factors,and laboratory indicators,for predicting the risk of PHLF in hepatocellular carcinoma *** this article,we discussed the non-invasive elastography modality by ultrasound and magnetic resonance imaging to assess *** on literature data,we subsequently suggested that several risk factors may contribute to PHLF,including excessive intrahepatic neutrophil accumulation,the formation of neutrophil extracellular traps,end-stage liver disease scores,and albumin-bilirubin ***,a more comprehensive study incor-porating detailed information requires further investigation.

关键词： Posthepatectomy liver failure Liver stiffness Hepatocellular carcinoma Elastography Ultrasound magnetic resonance imaging

智能化转型赋能企业高质量发展的路径和机制研究——基于发展新质生产力的视角

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科研管理 2025年第2期46卷 32-42页

作者：陈岩侯宇琦马欣徐玢北京邮电大学经济管理学院

新质生产力理论的提出为推动传统经济增长模式转型、促进高质量发展提供了重要指导。加快实现企业智能化转型不仅是催生新质生产力的重要动能，也是实现高质量发展的必由之路。基于此，本文从新质生产力角度切入研究智能化转型的赋能路... 详细信息

新质生产力理论的提出为推动传统经济增长模式转型、促进高质量发展提供了重要指导。加快实现企业智能化转型不仅是催生新质生产力的重要动能，也是实现高质量发展的必由之路。基于此，本文从新质生产力角度切入研究智能化转型的赋能路径，以A股制造业上市企业2012—2022年间的数据为样本，分析智能化转型对新质生产力及高质量发展的影响。研究发现：(1)智能化转型显著推动高质量发展，呈明显的线性关系；(2)机制检验发现，新质生产力作为中介机制，在智能化转型与高质量发展之间扮演了关键角色；(3)门槛效应分析发现，研发投入对于智能化转型和高质量发展有双门槛效应；(4)区域差异明显，中心城市智能化转型显著提升劳动者技能跃升，而非中心城市效果有限；(5)企业异质性分析发现，技术密集型企业的智能化转型能显著促进有形劳动资料跃升，而资产密集型和劳动密集型企业影响不明显。本文将马克思主义生产力理论和经济学范畴下的生产要素理论相结合，为实现新质生产力的提升和推动企业高质量发展提供了理论基础和实践指导。

关键词：智能化转型新质生产力生产要素创新配置高质量发展

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中医药治疗慢性主观性耳鸣伴焦虑状态研究进展

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山东中医杂志 2025年第2期44卷 236-241页

作者：马玉平江燕马艳甘肃中医药大学中西医结合学院甘肃兰州730030 甘肃省中医院耳鼻喉科甘肃兰州730050

慢性主观性耳鸣伴发焦虑状态给患者工作和生活带来了巨大的困扰,但由于其发病机制尚未完全阐明,西医在治疗该疾病方面总体效果欠佳。中医治疗该疾病以整体观、辨证论治的思想为指导,采用中药方剂、针灸推拿等诸多内外合治的方式,在治疗... 详细信息

慢性主观性耳鸣伴发焦虑状态给患者工作和生活带来了巨大的困扰,但由于其发病机制尚未完全阐明,西医在治疗该疾病方面总体效果欠佳。中医治疗该疾病以整体观、辨证论治的思想为指导,采用中药方剂、针灸推拿等诸多内外合治的方式,在治疗该疾病方面具有明显优势。本文综合文献观点,认为慢性主观性耳鸣伴焦虑状态的发生主要与心、肝、脾、肾等脏腑密切相关其基本病机为虚实夹杂,实证以肝火上炎、肝郁气滞为主,虚证以心脾两虚、心肾不交、肾精亏虚多见。从中医药治疗、中西医结合治疗以及外治法3个方面的研究进展进行综述,以期为该类患者的临床治疗和药物研究提供参考,进一步提高其临床疗效。参考文献41篇。

关键词：慢性主观性耳鸣焦虑状态肝火上扰中医药治疗综述