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Design high-performance narrowband emitters for blue light-emitting diodes through manipulating resonance structure of aromatic heterocycles

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Science China Chemistry 2025年

作者： yue yu Lei xu Wenle Tan yuyu Pan Jiyin Xiao Bohan Wang Guangjun Tian yuguang Ma Lei Ying Institute of Polymer Optoelectronic Materials and Devices Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials State Key Laboratory of Luminescent Materials and Devices South China University of Technology School of Petrochemical Engineering Shenyang University of Technology Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Yanshan University

Narrowband light-emitting materials play critical roles in improving the color gamut and energy consumption of electroluminescence. Herein we demonstrated that by regulating the ground state resonance structure form of emitters with polycyclic aromatic heterocycles, the high-energy vibration of the C–C bond can be effectively suppressed, resulting in narrow emission like classical cyanine dyes. The designed compounds consist of twist and planar conformation, while having differences in the orientation of the positioning electron-donating(nitrogen) and electron-accepting(carbonyl) groups in the polycyclic aromatic hydrocarbon skeleton. The resulting compound Ac-Ph-Ac with a dominated zwitterionic resonance structure exhibits a relatively wide electroluminescent profile with the full width at half maximum(FWHM) of 42 nm and moderate device performance. In contrast, the “soliton transition” of 2AcPh based on the cyanine limit character effectively suppresses C–C stretching vibration in the polycyclic aromatic heterocycle skeleton, leading to a narrow electroluminescent profile with FWHM of 30 nm(0.16 eV)associated with an impressively high external quantum efficiency of 28.52%, which is among the highest efficiencies of so far reported non-sensitized organic light-emitting diodes.

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Metabolic reprogramming: a new option for the treatment of spinal cord injury

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Neural Regeneration Research 2025年第4期20卷 1042-1057页

作者： Jiangjie Chen Jinyang Chen Chao yu Kaishun Xia Biao Yang Ronghao Wang Yi Li Kesi Shi yuang Zhang Haibin xu xuesong Zhang Jingkai Wang Qixin Chen Chengzhen Liang Department of Orthopedics The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhouZhejiang ProvinceChina Orthopedics Research Institute of Zhejiang University Zhejiang UniversityHangzhouZhejiang ProvinceChina Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province HangzhouZhejiang ProvinceChina Clinical Research Center of Motor System Disease of Zhejiang Province HangzhouZhejiang ProvinceChina Qiandongnan Prefecture People’s Hospital KailiGuizhou ProvinceChina Department of Orthopedics Fourth Medical CenterChinese PLA General HospitalBeijingChina

Spinal cord injuries impose a notably economic burden on society,mainly because of the severe after-effects they *** the ongoing development of various therapies for spinal cord injuries,their effectiveness remains ***,a deeper understanding of metabolism has opened up a new therapeutic opportunity in the form of metabolic *** this review,we explore the metabolic changes that occur during spinal cord injuries,their consequences,and the therapeutic tools available for metabolic *** spinal cord metabolism is characterized by independent cellular metabolism and intercellular metabolic ***,spinal cord injury results in metabolic disorders that include disturbances in glucose metabolism,lipid metabolism,and mitochondrial *** metabolic disturbances lead to corresponding pathological changes,including the failure of axonal regeneration,the accumulation of scarring,and the activation of *** rescue spinal cord injury at the metabolic level,potential metabolic reprogramming approaches have emerged,including replenishing metabolic substrates,reconstituting metabolic couplings,and targeting mitochondrial therapies to alter cell *** available evidence suggests that metabolic reprogramming holds great promise as a next-generation approach for the treatment of spinal cord *** further advance the metabolic treatment of the spinal cord injury,future efforts should focus on a deeper understanding of neurometabolism,the development of more advanced metabolomics technologies,and the design of highly effective metabolic interventions.

关键词： axons glycolysis metabolic reprogramming metabolism mitochondria neural regeneration neuroprotection oxidative phosphorylation spinal cord injury therapy

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Dynamic performance enhancement in Ti/Au ohmic contacts on β-Ga2O3-on-Si C substrates: evidence from pulsed measurements

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Science China(Information Sciences) 2025年第1期68卷 400-401页

作者： Chenyu LIU Yibo WANG Wenhui xu Shuqi HUANG Chunxiao yu Zeyu YANG Xiaole JIA Xiaoxi LI Bochang LI Zhengdong LUO Cizhe FANG Yan LIU Tiangui YOU Xin OU Genquan HAN School of Microelectronics Xidian University Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Hangzhou Institute of Technology Xidian University

Titanium/Gold （Ti/Au） metals have been widely employed as ohmic metal contacts on n+Ga2O3,exhibiting the specific contact resistance （ρc） of 10-5-10-6Ω·cm2[1].But previous studies have revealed the presence of a defective Ga2O3layer and reactive Ti-Ga2O3layer at the annealed Ti/*** an interfacial layer can afect the performance of ohmic contact,which may become more pronounced in power devices subjected to electrical stress and high-frequency ***,there have been no reports on the impact of bias stress effects and dynamic degradation of Ti/Au ohmic contacts on n+Ga2O3.

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校园多媒体课堂门禁设计

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计算机工程与设计 2009年第14期30卷 3462-3465页

作者：武智瑛张利辉李淑芳于清旭大连理工大学光电子科学技术研究所辽宁大连116024 中国环境管理干部学院信息工程系河北秦皇岛066004

采用MIFARE完成IC读卡器射频天线相关的设计,提出具体射频天线和对应匹配电路的设计要求,以达到无接触式读卡通信的最佳性能。对射频卡的数据结构,数据传输的方式,相关的时序,典型电路的设计参数,匹配电路,电磁兼容性电路,数据安全性与... 详细信息

采用MIFARE完成IC读卡器射频天线相关的设计,提出具体射频天线和对应匹配电路的设计要求,以达到无接触式读卡通信的最佳性能。对射频卡的数据结构,数据传输的方式,相关的时序,典型电路的设计参数,匹配电路,电磁兼容性电路,数据安全性与完整性,门禁控制方式等进行了详尽地探讨,并给出了一个根据射频天线接口电路理论和无接触读卡通信协议设计出校园多媒体课堂的门禁系统。非接触式高频射频卡用于门禁系统,克服了传统门禁功能单一,升级困难,保密性差的缺点,是各类门禁系统的发展方向。

关键词： MIFARE 无接触式读卡器射频天线门禁控制数据加密电路匹配

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高精度稳频基准频率斩波控制电路

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工业计量 2008年第1期18卷 20-22页

作者：武智瑛张望于清旭大连理工大学光电子科学技术研究所大连理工大学光电子科学技术研究所辽宁大连116024

现代测量技术尤其是现代环境监测要检测或监测的物质成分往往都是含量很低的,特别是在痕量成分的分析检测中,在极高的背景噪声中提取很弱的分析信号,一般需采用的锁相技术,必须用斩波控制电路提供稳定的参考频率。所以要确保斩波控制电... 详细信息

现代测量技术尤其是现代环境监测要检测或监测的物质成分往往都是含量很低的,特别是在痕量成分的分析检测中,在极高的背景噪声中提取很弱的分析信号,一般需采用的锁相技术,必须用斩波控制电路提供稳定的参考频率。所以要确保斩波控制电路能够输出稳定高精度的基准频率,这样才能准确地分析测量。

关键词：弱信号斩波控制电路稳频

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Solar trough receiver with V-grooved light traps for efficiency improvement

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Science China Technological Sciences 2025年第1期 146-156页

作者： Bin LIU qing LI yu QIU School of Energy Science and Engineering Central South University

Parabolic trough collector is a promising technology for both domestic and industrial heat supplies. To enhance the collector efficiency, a modified trough receiver with dozens of V-grooved light traps incorporated into its lower-half absorber was introduced. For assessing the performance of this receiver, a solar-thermal-stress coupled model was established. Using this model, firstly, the effects of the V-grooved light traps were investigated. The results reveal that, compared to the conventional trough receiver, the modified trough receivers equipped with different traps can reduce their optical losses by 81.9–138.0 Wm-1（i.e., 15.0%–25.2%）, improving their optical efficiencies by 1.60%–2.69%. However, these traps also result in increased thermal loss from the receiver. Therefore, there is no single optimal modified trough receiver that consistently outperforms all other receivers across all possible conditions. Nonetheless, the MTR30-3 and MTR60-3 receivers emerge as the optimized choices due to their better solar-thermal performance. Subsequently, performance evaluation reveals that the two optimized receivers can enhance the receiver efficiencies within the typical solar irradiance range by 0.02%–2.65% and 0.05%–1.70% when the inlet fluid temperatures are below 488 and 523 K, respectively. Consequently, the collector efficiencies can be improved by 0.02%–2.49% and 0.05%–1.60%, respectively. Additionally, thermal stress analysis verifies that the two optimized receivers remain within safe limits under all typical conditions. Given that the heating temperature of a typical solar collector for domestic or industrial heat supply is typically below 523 K, the integration of the two optimized receivers has the capability to effectively enhance the overall collector efficiency.

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Lipomatous ependymoma with ZFTA:RELA fusion-positive:A case report

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World Journal of Clinical Cases 2025年第1期13卷 48-55页

作者： Xiao-yu Zhao Juan-Han yu Yi-Hua Wang Yi-Xin Liu Lu xu Lin Fu Ning Yi China Medical University The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Department of Pathology The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Anshan Cancer Hospital Anshan 114000Liaoning ProvinceChina

BACKGROUND Ependymoma with lipomatous differentiation is a rare type of *** ZFTA fusion-positive supratentorial ependymoma is a novel tumor type in the 2021 World Health Organization classification of central nervous system *** fusion-positive lipomatous ependymoma has not been reported to *** SUMMARY We reported a case of a 15-year-old Chinese male who had a sudden convulsion lasting approximately six *** resonance imaging showed a round cystic shadow of approximately 1.9 cm×1.5 cm×1.9 cm under the right parieto-occipital *** examination showed characteristic perivascular pseudorosettes and adipose differentiation in the ***-chemical staining showed that the tumor cells were negative for cytokeratin,NeuN,Syn and p53,but positive for GFAP,vimentin and S-100 ***-ficant punctate intracytoplasmic EMA immunoreactivity was *** level of Ki-67 was about 5%.Genetic analysis revealed ZFTA:RELA fusion.A cranio-tomy with total excision of the tumor was *** follow-up time was 36 months,no evidence of disease recurrence was found in magnetic resonance *** Based on these findings,the patient was diagnosed as a ependymoma with ZFTA fusion and lipomatous *** case report provides information on the microscopic morphological features of ependymoma with ZFTA fusion and lipomatous differentiation,which can help pathologists to make a definitive diagnosis of this tumor.

关键词： Ependymoma Lipomatous Molecular classification Supratentorial ZFTA:RELA fusion Case report

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长周期光纤光栅耦合模理论与制作技术的研究

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大连民族学院学报 2006年第1期8卷 73-75页

作者：关寿华宋世德于清旭大连民族学院理学院辽宁大连116600 大连理工大学物理系辽宁大连116024

基于耦合模理论对长周期光纤光栅的光谱特性进行了理论分析,推导出传输率、谐振波长等公式;利用精密步进电机和高频CO2激光器,设计采用高频CO2激光脉冲三束对称逐点写入技术,在普通通信单模光纤中成功地进行了长周期光纤光栅的制备研究.

关键词：长周期光纤光栅耦合模理论制备

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强激光的靶面均匀辐照和光束匀滑技术

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中央民族大学学报（自然科学版） 2008年第1期17卷 29-36页

作者：郑建洲于清旭关寿华大连理工大学物理与光电工程学院

惯性约束核聚变(ICF)的研究对解决当今世界面临的能源危机具有重要意义.为实现ICF聚变点火,要求聚焦到靶面的强激光具有很高的均匀性.分析了实现激光光束匀滑和靶面均匀辐照的几种主要技术方案的原理和方法,得出各技术手段的性能特点及... 详细信息

惯性约束核聚变(ICF)的研究对解决当今世界面临的能源危机具有重要意义.为实现ICF聚变点火,要求聚焦到靶面的强激光具有很高的均匀性.分析了实现激光光束匀滑和靶面均匀辐照的几种主要技术方案的原理和方法,得出各技术手段的性能特点及适用条件.

关键词：惯性约束聚变均匀辐照光束匀滑激光驱动器相干性

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Optimization of structural parameters for spatial flexible redundant manipulators with maximum ratio of load to mass

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光学精密工程 2005年第5期13卷 561-569页

作者： ZHANG xu-ping yu yue-qing Department of Mackine Design School of Mechanical Engineering Beijing Polytechnic University Beijing 100022 China

Optimization of structural parameters aimed at improving the load carrying capacity of spatial flexible redundant manipulators is presented in this paper. In order to increase the ratio of load to mass of robots, the cross-sectional parameters and constructional parameters are optimized respectively. The cross-sectional and configurational parameters are optimized simultaneously. The numerical simulation of a 4R spatial manipulator is performed. The results show that the load capacity of robots has been greatly improved through the optimization strategies proposed in this paper.

关键词：调节器结构参数机器人动力性质 KED

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