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MRI对膝关节外伤后前后交叉韧带损伤的诊断价值

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组织工程与重建外科杂志 2017年第3期13卷 157-159页

作者：谭延召田克郑州大学第五附属医院放射影像科河南省郑州市450052 郑州大学第五附属医院骨科河南省郑州市450052

目的探讨MRI在膝关节外伤后前后交叉韧带损伤诊断中的临床应用。方法 2015年10月至2016年12月,共65例膝关节交叉韧带损伤患者,按照就诊顺序分为观察组(n=33)和对照组(n=32)。对照组采用CT扫描检查,观察组使用MRI,对患者关节进行扫描,比... 详细信息

目的探讨MRI在膝关节外伤后前后交叉韧带损伤诊断中的临床应用。方法 2015年10月至2016年12月,共65例膝关节交叉韧带损伤患者,按照就诊顺序分为观察组(n=33)和对照组(n=32)。对照组采用CT扫描检查,观察组使用MRI,对患者关节进行扫描,比较两组的诊断效果。结果 MRI测量值与膝关节交叉韧带解剖标本的解剖测量值相比,差异无统计学意义(P>0.05);与CT测量值相比,MRI测量值与解剖值更接近,差异有统计学意义(P<0.05);MRI检查膝关节交叉韧带诊断符合率显著高于CT检查,差异有统计学意义(P<0.05)。结论 MRI检查测量值能够反映膝关节交叉韧带的真实解剖值,诊断符合率优于CT检查,是膝关节韧带损伤无创性检查诊断的首选方法。

关键词：膝关节外伤 MRI检查交叉韧带

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大频移范围光纤拉曼增益谱的测量

红外与激光工程 2024年第5期53卷 143-150页

作者：张扬何俊鸿柯延钊郭艺东梁峻锐马小雅叶俊许将明冷进勇周朴国防科技大学前沿交叉学科学院湖南长沙410073 国防科技大学南湖之光实验室湖南长沙410073 国防科技大学高能激光技术湖南省重点实验室湖南长沙410073

光纤拉曼增益谱的测量对光纤激光器的设计与优化至关重要。当前光纤拉曼增益谱的测量主要是基于小信号增益法,但该方法测试时间较长,且可测量的频移范围受限于信号源的波长调谐范围,难以获得光纤在大频移范围内的拉曼增益谱。为此,提出... 详细信息

光纤拉曼增益谱的测量对光纤激光器的设计与优化至关重要。当前光纤拉曼增益谱的测量主要是基于小信号增益法,但该方法测试时间较长,且可测量的频移范围受限于信号源的波长调谐范围,难以获得光纤在大频移范围内的拉曼增益谱。为此,提出了一种利用光纤的自发拉曼散射谱来反演光纤在大频移范围内拉曼增益谱的方法。利用该方法测量了两款光纤——掺磷光纤与掺锗光纤在1~42 THz频移范围内的拉曼增益谱。在1.6~22 THz频移范围内,基于该方法测得的拉曼增益系数与基于小信号增益法测得的结果基本一致。该工作为测量光纤在大频移范围内的拉曼增益谱提供了一种解决方案。

关键词：拉曼光纤激光器拉曼增益谱测量自发拉曼散射掺磷光纤

Stability and Stabilization of Sampled-Data Based LFC for Power Systems:A Data-Driven Method

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 291-293页

作者： Yu-Long Fan Chuan-ke Zhang Yong He the School of Automation China University of Geosciences the Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems the Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education IEEE

Dear Editor,This letter is concerned with stability analysis and stabilization design for sampled-data based load frequency control(LFC) systems via a data-driven method. By describing the dynamic behavior of LFC systems based on a data-based representation, a stability criterion is derived to obtain the admissible maximum sampling interval(MSI) for a given controller and a design condition of the PI-type controller is further developed to meet the required MSI. Finally, the effectiveness of the proposed methods is verified by a case study.

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1μm波段低量子亏损光纤激光研究进展(特邀)

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红外与激光工程 2023年第6期52卷 237-249页

作者：许将明张扬马小雅叶俊柯延钊李思成梁峻锐何俊鸿黄良金潘志勇姚天甫冷进勇周朴国防科技大学前沿交叉学科学院湖南长沙410073 国防科技大学南湖之光实验室湖南长沙410073 国防科技大学高能激光技术湖南省重点实验室湖南长沙410073

量子亏损对高功率光纤激光器内的废热产生和光光转换效率具有重要影响,光纤激光器输出功率的提升过程可以视为不断与量子亏损作斗争的过程。文中梳理了近年来1μm波段低量子亏损光纤激光的重要进展,重点介绍了稀土掺杂增益和拉曼增益两... 详细信息

量子亏损对高功率光纤激光器内的废热产生和光光转换效率具有重要影响,光纤激光器输出功率的提升过程可以视为不断与量子亏损作斗争的过程。文中梳理了近年来1μm波段低量子亏损光纤激光的重要进展,重点介绍了稀土掺杂增益和拉曼增益两种体制的光纤激光器在实现低量子亏损输出方面的相关工作。在稀土掺杂光纤激光器中,采用级联泵浦、多组分掺杂、强泵浦等技术可降低激光器的量子亏损,其中量子亏损≤1%的掺镱光纤激光器已实现400 mW功率输出。在拉曼光纤激光器中,通过采用特殊掺杂、泵浦光谱调控、增益竞争抑制等技术,量子亏损≤1%的拉曼光纤激光器已实现百瓦级功率输出,并成功验证包层泵浦方案的可行性,表明其在实现高功率低量子亏损输出方面具有重要潜力。

关键词：光纤激光器高功率低量子亏损掺镱光纤激光拉曼光纤激光

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高功率激光典型参数的先进测量方法

国防科技 2023年第5期44卷 9-19页

作者：周朴许将明蒋敏李灿李俊安毅叶俊柯延钊梁峻锐国防科技大学前沿交叉学科学院湖南长沙410074 国防科技大学试验训练基地陕西西安710106

高功率激光是高技术领域的前沿和热点。近年来,以超高功率、超短脉宽、超窄线宽等为代表的各类激光性能持续稳定提升,模式、光谱、脉宽等多维参数可控输出成为重要特征,常规的激光性能参数测量方法难以满足前沿研究和高端应用领域的需... 详细信息

高功率激光是高技术领域的前沿和热点。近年来,以超高功率、超短脉宽、超窄线宽等为代表的各类激光性能持续稳定提升,模式、光谱、脉宽等多维参数可控输出成为重要特征,常规的激光性能参数测量方法难以满足前沿研究和高端应用领域的需求。梳理近年来高功率激光的功率、模式/光束质量、光谱、时间、相位等重要参数的先进测量方法,介绍技术进步和测量效果,分析拓展应用潜力,展望高功率激光测量方法的未来发展方向。

关键词：高功率激光参数测量

Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou ke Yajing Zhao Xin Min Yanghong Li Ruiyu Mi Yangai Liu Xiaowen Wu Minghao Fang Zhaohui Huang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

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Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei Cheng Zhaoyang Yao Ning Li Long Ye Lijian Zuo ke Gao key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

Extramedullary plasmacytoma with the uvula as first affected site:A case report

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World Journal of Clinical Oncology 2025年第1期16卷 53-58页

作者： Jing Yang Hui Peng Sheng-ke Tu Min Li Kui Song Department of Hematology The First Affiliated Hospital of Jishou UniversityJishou 416000Hunan ProvinceChina Department of Pharmacy The First Affiliated Hospital of Jishou UniversityJishou 416000Hunan ProvinceChina

BACKGROUND Extramedullary plasmacytoma(EMP)represents one of the rarer forms of plasma cell malignancies,capable of impacting a variety of tissues and organs throughout the *** majority of EMP cases are predominantly found in the head and neck region,especially within the laryngopharynx,as well as in the gastrointestinal *** there have been documented instances of oropharyngeal involvement in EMP cases in the academic literature,it is important to note that EMP specifically affecting the uvula is exceedingly ***,it is noteworthy that over 60% of epithelial carcinomas in the upper respiratory tract and oropharynx tend to metastasize to the cervical lymph nodes,indicating a propensity for regional spread in these types of *** this context,we present a rare case of extramedullary plasmacytoma where the uvula served as the initially affected *** case emphasizes the need for heightened awareness among clinicians regarding such unusual comorbidities,as early recognition and diagnosis can significantly influence patient management and treatment *** addition,a review of the relevant literature is included to further educate and inform healthcare professionals about this rare presentation,ultimately aiming to enhance clinical understanding and improve patient care in similar *** SUMMARY A 51-year-old man was admitted to our hospital because of a slowly enlarging neck mass.A physical examination revealed a palpable left lymph node,and magnetic resonance imaging(MRI)of the oropharynx and the neck showed a soft tissue mass in the oropharynx and enlargement of multiple lymph nodes in the *** soft tissue mass was diagnosed as plasmacytoma by immunohistochemical *** immunoglobulins and bone marrow biopsy showed normal ***,we diagnosed that as EMP of the *** four cycles of adjuvant chemotherapy dominated by bortezomib,MRI reexamination showed a significant reduction of the mass

关键词： Extramedullary plasmacytoma Plasmacytoma Uvula Multiple myeloma Case report

Actively tunable electromagnetically induced transparency in hybrid Dirac-VO2 metamaterials

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Optoelectronics Letters 2025年第1期21卷 13-20页

作者： DI ke XIE Meng XIA Huarong CHENG Anyu LIU Yu DU Jiajia Department of Optoelectronic Engineering Chongqing University of Post and Telecommunications Chongqing key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Posts and Telecommunications Department of Automation Chongqing University of Post and Telecommunications

In this paper, we present a metamaterial structure of Dirac and vanadium dioxide（VO2） and investigate its optical properties using the finite-difference time-domain（FDTD） technique. Using the phase transition feature of VO2, the design can realize active tuning of the plasmon induced transparency（PIT） effect at terahertz frequency, thereby converting from a single PIT to a double-PIT. When VO2is in the insulating state, the structure is symmetric to obtain a single-band PIT effect. When VO2is in the metallic state, the structure turns asymmetric to realize a dual-band PIT effect. This design provides a reference direction for the design of actively tunable metamaterials. Additionally, it is discovered that the transparent window's resonant frequency and the Fermi level in this structure have a somewhat linear relationship. In addition, the structure achieves superior refractive index sensitivity in the terahertz band, surpassing 1 THz/RIU. Consequently, the design exhibits encouraging potential for application in refractive index sensors and optical switches.

关键词： Transparency