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IN　SITULASER　RAMAN　SPECTROSCOPY　OF　THERMAL　DECOMPOSITION　OF　AMMONIUM　TUNGSTATE

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Chinese Chemical Letters 1995年第12期6卷 1085-1086页

作者： Li, XS zhu, BZ Wang, L Miao, YF Xin, q Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China Henan Coll Educ Dept Chem Zhengzhou 450003 Peoples R China

The mechanism of thermal decomposition of ammonium tungstate has been studied by to situ laser Raman spectroscopy (LRS) combined with thermal gravimetric analysis (TG), differental thermal analysis (DTA) and X-ray dif...

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Hybrid Excited Permanent Magnet Machines for Electric and Hybrid Electric Vehicles

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CES Transactions on Electrical Machines and Systems 2019年第3期3卷 233-247页

作者： Z.q.zhu S.Cai Department of Electronics and Electrical Engineering University of SheffieldSheffieldS13JD U.K

This paper reviews various hybrid excited(HE)machines from the perspective of location of PM and DC excitation,series/parallel connection of PM and DC excited magnetic fields,and 2D/3D magnetic fields,*** advantages as well as drawbacks of each category are *** an additional control degree,*** excitation,is introduced in the HE machine,the flux weakening control strategies are more *** flux weakening performance as well as efficiency are compared with different control ***,the potential to mitigate the risk of uncontrolled overvoltage fault at high speed operation is highlighted by controlling the field *** additional DC coils are usually required for HE machines compared with pure PM excitation,the spatial confliction inevitably results in electromagnetic performance ***,the technique to integrate the field and armature windings with open-winding drive circuit is introduced,and novel HE machines without a DC coil are summarized.

关键词： Electric vehicle(EV) flux weakening control hybrid electric vehicle(HEV) hybrid excited(HE)machine open-winding permanent magnet(PM).

Optimal Split Ratio in Small High Speed PM Machines Considering Both Stator and Rotor Loss Limitations

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CES Transactions on Electrical Machines and Systems 2019年第1期3卷 3-11页

作者： J.Ma Z.q.zhu Department of Electrical and Electronic Engineering The University of SheffieldSheffieldS13JDU.K.

The split ratio which is defined as the ratio between rotor and stator outer diameters is critical for permanent magnet(PM)*** this paper,the split ratio in small high speed PM machines is optimized analytically by considering both stator and rotor loss *** this way,the thermal constrains in both stator and rotor parts can be taken into *** shows that both losses can significantly affect the optimal split ratio and the machine *** considering the influence of rotor losses,especially the rotor eddy current loss,the optimal split ratio is increased significantly in certain *** output torque is calculated analytically and the influences of several key design parameters on the optimal split ratio,***/pole combinations and magnet materials,are also investigated in ***,finite element(FE)analyses are carried out for validating of the analytical model.

关键词： Index Terms-High speed permanent magnet split ratio.

Mn^(2+)掺杂准二维钙钛矿的制备及发光性能调控

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发光学报 2024年第10期45卷 1647-1655页

作者：朱珂欣李靖陈旖勃庞起广西大学化学化工学院广西南宁530004 广州大学化学化工学院清洁能源与材料研究所广东广州510006

准二维(q-2D)卤化铅钙钛矿由于兼具二维(2D)钙钛矿的高稳定性和三维(3D)钙钛矿的高光吸收效率引起了人们的广泛关注。然而,q-2D卤化铅钙钛矿发光效率通常较低且具有铅毒性。本文使用简单的室温反溶剂法制备了Mn^(2+)掺杂q-2D卤化铅钙钛... 详细信息

准二维(q-2D)卤化铅钙钛矿由于兼具二维(2D)钙钛矿的高稳定性和三维(3D)钙钛矿的高光吸收效率引起了人们的广泛关注。然而,q-2D卤化铅钙钛矿发光效率通常较低且具有铅毒性。本文使用简单的室温反溶剂法制备了Mn^(2+)掺杂q-2D卤化铅钙钛矿材料PEA2MAPb2Br7∶Mn(PEA:苯乙胺;MA:甲胺)。在365 nm紫外光激发下,Mn^(2+)掺杂q-2D钙钛矿呈现明亮的橙色发射。发光光谱展现了弱的激子发光峰和位于610 nm的强橙色发射光,归属于Mn^(2+)的特征发射峰。光致发光量子产率(PLqY)从Mn^(2+)掺杂前的1.49%提高到50.25%,提高的原因是Mn^(2+)掺杂抑制了3D钙钛矿的生长,从而提高了2D相比例;由于2D结构具有显著的量子限域效应,导致电子态和空穴态的能级密度增加,从而有效提高了宿主和Mn^(2+)之间的能量传输效率。本工作探索了离子掺杂调控q-2D物相结构及能量传递策略,为波长可调、高发光效率的卤化物钙钛矿研究提供了借鉴。

关键词：准二维钙钛矿 Mn^(2+)掺杂发光性能

基于延迟校正扩张状态观测器的内置式永磁同步电机电流控制策略

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电工技术学报 2024年第6期39卷 1698-1712页

作者：朱玉璞杨淑英王奇帅合肥工业大学电气与自动化工程学院合肥230009

高速电驱动场合会受到开关频率的限制,低载波比特性凸显,由此引起的控制延迟问题影响了内置式永磁同步电机(IPMSM)矢量控制系统性能。基于扩展电动势的建模方案能够获得IPMSM的对称化模型,有利于离散化分析和设计,以提升低载波比运行性... 详细信息

高速电驱动场合会受到开关频率的限制,低载波比特性凸显,由此引起的控制延迟问题影响了内置式永磁同步电机(IPMSM)矢量控制系统性能。基于扩展电动势的建模方案能够获得IPMSM的对称化模型,有利于离散化分析和设计,以提升低载波比运行性能。扩张状态观测器(ESO)能够实现扩展电动势和扰动的集总观测,然而低载波比延迟问题影响了估算性能。该文在离散域中分析延迟影响,设计和对比研究了几种延迟影响抑制方案,即延迟校正扩张状态观测器,提升了估计精度。基于此,设计了IPMSM离散域电流控制方案,显著提升了电流响应特性。通过电动汽车驱动实验平台验证了该文的分析和设计。

关键词：内置式永磁同步电机数字控制延迟扩张状态观测器离散域设计

Weighted High Order Poincaré Inequalities on Stratified Lie Groups

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数学进展 2024年第5期53卷 1071-1083页

作者： HAN Yecong HUANG Tiren XU Chengdan zhu Tingjing School of Mathematics South China University of TechnologyGuangzhouGuangdong510630P.R.China Department of Mathematics Zhejiang Sci-Tech UniversityHangzhouZhejiang310018P.R.China

In this paper,we focus on studying weighted Poincare inequalities on stratified Lie *** derive various Poincaréinequalities in the case 1q<∞ in the high order Sobolev space Wm,*** derive several Poincare inequali... 详细信息

In this paper,we focus on studying weighted Poincare inequalities on stratified Lie *** derive various Poincaréinequalities in the case 1qqualities that complement existing results,which have only been proved for the case 1q<∞.

关键词： A_(p)weight Poincaréinequality entire space stratified Lie group high order Sobolev space

基于ATN诊断框架下的阿尔茨海默病分子影像探针研究进展

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中国医学影像学杂志 2024年第5期32卷 510-516页

作者：朱泽华朱星星谢强汪世存潘博中国科学技术大学附属第一医院核医学科安徽合肥230001

阿尔茨海默病(AD)是最常见的神经退行性疾病,通常发生于65岁及以上老年人,轻度认知障碍通常是AD的前驱阶段。利用PET/CT技术可以对AD的潜在分子和细胞过程进行活体成像。基于ATN框架下的β淀粉样蛋白PET、tau PET和FDG PET多探针显像可... 详细信息

阿尔茨海默病(AD)是最常见的神经退行性疾病,通常发生于65岁及以上老年人,轻度认知障碍通常是AD的前驱阶段。利用PET/CT技术可以对AD的潜在分子和细胞过程进行活体成像。基于ATN框架下的β淀粉样蛋白PET、tau PET和FDG PET多探针显像可以表征AD的核心神经病理特征。最近相关研究开发并应用多种新型PET示踪剂,以深入探查AD病理生理功能障碍及内环境改变。本综述总结ATN框架下β淀粉样蛋白、tau蛋白、FDG及神经炎症PET探针在AD研究中的最新进展。

关键词：阿尔茨海默病分子成像轻度认知障碍正电子发射计算机断层摄影术放射性示踪剂

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Extracellular vesicles from human urine-derived stem cells delay aging through the transfer of PLAU and TIMP1

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1166-1186页

作者： Shanshan Rao Zehui He Zun Wang Hao Yin Xiongke Hu Yijuan Tan Tengfei Wan Hao zhu Yi Luo Xin Wang Hongming Li Zhenxing Wang Xinyue Hu Chungu Hong Yiyi Wang Mingjie Luo Wei Du Yuxuan qian Siyuan Tang Hui Xie Chunyuan Chen Department of Orthopedics Movement System Injury and Repair Research CenterXiangya HospitalCentral South UniversityChangsha 410008China Hunan Key Laboratory of Angmedicine Changsha 410008China Xiangya School of Nursing Central South UniversityChangsha 410013China Department of Pediatric Orthopedics Hunan Children’s HospitalUniversity of South ChinaChangsha 410007China Department of Respiratory Medicine Xiangya HospitalCentral South UniversityChangsha 410008China School of Nursing Xinjiang Medical UniversityUrumqiXinjiang 830000China Department of Rehabilitation Xiangya HospitalCentral South UniversityChangsha 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China

Aging increases the risks of various diseases and the vulnerability to *** senescence is a hallmark of aging that contributes greatly to aging and aging-related *** study demonstrates that extracellular vesicles from human urine-derived stem cells(USC-EVs)efficiently inhibit cellular senescence in vitro and in *** intravenous injection of USC-EVs improves cognitive function,increases physical fitness and bone quality,and alleviates aging-related structural changes in different organs of senescence-accelerated mice and natural aging *** anti-aging effects of USC-EVs are not obviously affected by the USC donors’ages,genders,or health *** analysis reveals that USC-EVs are enriched with plasminogen activator urokinase(PLAU)and tissue inhibitor of metalloproteinases 1(TIMP1).These two proteins contribute importantly to the anti-senescent effects of USC-EVs associated with the inhibition of matrix metalloproteinases,cyclin-dependent kinase inhibitor 2A(P16INK4a),and cyclin-dependent kinase inhibitor 1A(P21cip1).These findings suggest a great potential of autologous USC-EVs as a promising anti-aging agent by transferring PLAU and TIMP1 proteins.

关键词： Extracellular vesicles Urine-derived stem cells Cellular senescence Anti-aging PLAU TIMP1 Senescence-accelerated mice Natural aging mice

约4900年前东亚和东南亚枢纽地区狩猎采集向农业的转变

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Science Bulletin 2024年第1期69卷 103-113页

作者：马敏敏卢敏霞孙瑞朱忠华 Dorian q.Fuller 郭健新何光林杨晓敏谭玲玲芦永秀董佳佳刘睿良杨继帅李波郭天南李小瑞赵东月张颖王传超董广辉 Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Zhaotong University Zhaotong 657000China Westlake Laboratory of Life Sciences and Biomedicine Key Laboratory of Structural Biology of Zhejiang ProvinceSchool of Life SciencesWestlake UniversityHangzhou 310024China Institute of Basic Medical Sciences Westlake Institute for Advanced StudyHangzhou 310024China Yunnan Provincial Institute of Cultural Relics and Archaeology Kunming 650118China Institute of Archaeology University College LondonLondon WC1H 0PYUK School of Cultural Heritage Northwest UniversityXi’an 710069China State Key Laboratory of Cellular Stress Biology School of Life SciencesXiamen UniversityXiamen 361102China Department of Anthropology and Ethnology Institute of AnthropologySchool of Sociology and AnthropologyXiamen UniversityXiamen 361005China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Westlake Omics(Hangzhou)Biotechnology Co. Ltd.Hangzhou 310024China The Department of Asia British MuseumLondon WC1E 7JWUK Tonghai Cultural Relics Management Yuxi 652700China Group of Alpine Paleoecology and Human Adaptation Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentBeijing 100101China Ministry of Education Key Laboratory of Contemporary Anthropology Department of Anthropology and Human GeneticsSchool of Life SciencesFudan UniversityShanghai 200433China

The southward expansion of East Asian farmers profoundly influenced the social evolution of Southeast Asia by introducing cereal ***,the timing and routes of cereal expansion in key regions are unclear due to limited empirical *** we report macrofossil,microfossil,multiple isotopic(C/N/Sr/O)and paleoproteomic data directly from radiocarbon-dated human samples,which were unearthed from a site in Xingyi in central Yunnan and which date between 7000 and 3300 a *** isotopes reveal the earliest arrival of millet ca.4900 a BP,and greater reliance on plant and animal agriculture was indicated between 3800 and 3300 a *** dietary differences between hunter-gatherer and agricultural groups are also evident in the metabolic and immune system proteins analysed from their skeletal *** results of paleoproteomic analysis indicate that humans had divergent biological adaptations,with and without *** combined application of isotopes,archaeobotanical data and proteomics provides a new approach to documenting dietary and health changes across major subsistence transitions.

关键词： Isotopes Proteomics Yunnan Millet Agricultural origins Human health