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Chinese Chemical Letters 2002年第6期13卷 571-572页

作者： yao qun li Jia Ju XU Run Tang WANG li Jun YU Zhao li Department of Chemistry and the Key Laboratory of Analytical Sciences of MOE Xiamen UniversityXiamen 361005

A spectrometric setup to perform total internal reflection fluorescence (TIRF) and synchronous TIRF measurements at solid/liquid interfaces is presented. The combination of TIRF and synchronous fluorescence was proposed to analyze simultaneously different components at interfaces. The TIRF excitation, emission and synchronous spectra of a watersoluble porphyrin were obtained from water/glass interface using this setup without the existence of a surfactant.

关键词： Total internal reflection fluorescence synchronous fluorescence spectrofluorimeter meso-tetra(4-sulfonatophenyl)porphyrin.

Modulating ion current rectification generating high energy output in a single glass conical nanopore channel by concentration gradient

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Chinese Chemical Letters 2015年第1期26卷 43-46页

作者： li-Xiang Zhang Yu-Bin Zheng Sheng-lin Cai Xiao-Hong Cao yao-qun li Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation College of Chemistry and Chemical Engineering.Xiamen University Shenzhen Haibin Pharmaceutical Co. Ltd.

Inspired by biological systems that have the inherent skill to generate considerable bioelectricity from the salt content in fluids with highly selective ion channels and pumps on cell membranes, herein, a fully abiotic, single glass conical nanopores energy-harvesting is demonstrated. Ion current rectification （ICR） in negatively charged glass conical nanopores is shown to be controlled by the electrolyte concentration gradient depending on the direction of ion diffusion. The degree of ICR is enhanced with the increasing forward concentration difference. An unusual rectification inversion is observed when the concentration gradient is reversely applied. The maximum power output with the individual nanopore approaches 10^4pW. This facile and cost-efficient energy-harvesting system has the potential to power tiny biomedical devices or construct future clean-energy recovery plants.

关键词： Glass conical nanopore channe Ion current rectification Concentration gradient Energy generation

Protective Effects of Phellodendron Species on Bone Health: A Novel Perspective on Their Potentials in Treating Osteoporosis and Osteoarthritis

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Chinese Journal of Integrative Medicine 2024年第4期30卷 379-384页

作者： XIN li TAN Guo-yao ZHANG Qiang ZHANG qun Good Clinical Practice Development Guangdong Provincial Key Laboratory of Bone and Joint Degeneration DiseasesThe Third Affiliated Hospital of Southern Medical UniversityGuangzhou(510630)China Department of Pharmacy Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou(510120)China

Phellodendron(PN)species,traditionally used in Chinese medicine for centuries,hold promise as a potential treatment for osteoporosis(OP)and osteoarthritis(OA)due to their bioactive *** bioactive compounds,including berberine and palmatine,exhibit anti-inflammatory,antioxidant,and bone-protective properties,contributing to their potential therapeutic benefits in promoting bone health and preventing bone ***,challenges such as the need for standardized preparation and dosing,limited clinical studies,and potential interactions with other medications hinder their clinical ***,the rich history of PN species in Chinese medicine provides a promising foundation for future investigation into their potential as alternative treatments for OP and *** research is needed to fully understand the underlying mechanisms of action and explore the clinical implications of PN for bone health.

关键词： Phellodendron species bone health osteoporosis osteoarthritis review

Simultaneous monitoring of the fluorescence and refractive index by surface plasmon coupled emission: A proof-of-concept study

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Chinese Chemical Letters 2023年第10期34卷 82-85页

作者： lin-Tao Xu Kai-Xin Xie Shuo-Hui Cao Yu-Hua Weng Min Chen Zhao li yao-qun li Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis&Instrumentation College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Department of Chemistry Taiyuan Normal UniversityJinzhong 030619China Department of Electronic Science Xiamen UniversityXiamen 361005China

Simultaneous acquisition of fluorescence property and refractive index using a single surface plasmon coupled emission(SPCE)measurement has been achieved,thus achieving synchronicity in real *** SPCE sensor was employed for monitoring the adsorption of volatile organic compounds(VOCs)by dyeencapsulated metal-organic frameworks(Dye@MOFs).Refractive index can reveal surface molecular adsorption and the fluorescence with information on refractive index can provide a comprehensive analysis of the adsorption events of VOCs on the ***,the signal intensity can be amplified by combining the responses caused by changes in refractive index and the fluorescence property in *** all-in-one method opens up a route to monitoring multiple processes simultaneously occurring on the interface.

关键词： Fluorescence with refractive index information Surface plasmon coupled emission Volatile organic compounds Dye-encapsulated metal-organic frameworks All-in-one method

Simultaneous Determination of Fluorescein, Rhodamine 6G and Rhodamine B in Turbid Solution by Polarization Variable-Angle Synchronous Fluorescence Spectrometry

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Chinese Chemical Letters 2000年第7期11卷 613-614页

作者： yao qun li Fang QIAN Xian Zhi HUANG(Department of Chemistry and Key Laboratory of Analytical Sciences of the Ministry of Education,Xiamen University, Xiamen 361005) Department of Chemistry Key Lab. Analyt. Sci. Min. of Educ. Xiamen University Xiamen 361005 China

Polarization variable-angle synchronous fluorescence spectrometry was proposed to determine samples in turbid solution. A mixture of fluorescein, rhodamine 6G and rhodamine B was used to evaluate the technique. The background caused by scattering light was decreased remarkably. The limits of detection were 0.6 ng/ml for fluorescein, 2.3 ng/ml for rhodamine 6G and 4.1 ng/ml for rhodamine B, respectively.

关键词： variable-angle synchronous fluorescence polarization fluorescein rhodamine 6G rhodamine B

血清MMP-9水平与大动脉粥样硬化型脑卒中患者颈动脉斑块新生血管的相关性研究

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中国血液流变学杂志 2024年第1期34卷 32-35,148页

作者：李超张恩迪姚丽群郑媛媛周小雪罗海龙牡丹江医学院附属红旗医院神经内科黑龙江牡丹江157011 牡丹江医学院黑龙江牡丹江157011

目的分析血清中基质金属蛋白酶-9(MMP-9)与大动脉粥样硬化型脑卒中(LAA)患者颈动脉斑块新生血管的相关性。方法选取120例经常规超声检查发现颈动脉粥样硬化斑块形成的患者作为研究对象,并根据患者在72 h内是否发生急性缺血性脑卒中分为... 详细信息

目的分析血清中基质金属蛋白酶-9(MMP-9)与大动脉粥样硬化型脑卒中(LAA)患者颈动脉斑块新生血管的相关性。方法选取120例经常规超声检查发现颈动脉粥样硬化斑块形成的患者作为研究对象,并根据患者在72 h内是否发生急性缺血性脑卒中分为实验组和对照组,两组各60例。比较两组患者不同颈动脉斑块狭窄程度、斑块回声、新生血管情况,并通过SMI检测颈部斑块新生血管情况,并分析血清中MMP-9水平与大动脉粥样硬化型脑卒中患者颈动脉斑块新生血管的关系,分析颈动脉斑块特征及相关危险因素与大动脉粥样硬化型脑梗死之间的关系。结果实验组斑块内新生血管高于对照组(P<0.05);有新生血管组UA、Lp(a)、MMP-9水平升高及糖尿病患者人数均高于无新生血管组(P<0.05)且MMP-9为主要因素。结论血清中MMP-9水平与斑块内新生血管形成密切相关,且斑块内新生血管与LAA发病率相关。

关键词：基质金属蛋白酶-9 大动脉粥样硬化型脑卒中斑块新生血管

Early monitoring values of oncogenic signalling molecules for hepatocellular carcinoma

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2350-2361页

作者： Min yao Rong-Fei Fang qun Xie Min Xu Wen-li Sai Deng-Fu yao Department of Immunology Medical School of Nantong University and Research Center of Clinical MedicineThe Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Gastroenterology The Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Infectious Diseases Haian People’s HospitalHaian 226600Jiangsu ProvinceChina Research Center of Clinical Medicine The Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina

The prevention and early diagnosis of liver cancer remains a global medical *** the malignant transformation of hepatocytes,a variety of oncogenic cellular signalling molecules,such as novel high mobility group-Box 3,angiopoietin-2,Golgi protein 73,glypican-3,Wnt3a(a signalling molecule in the Wnt/β-catenin pathway),and secretory clusterin,can be expressed and secreted into the *** signalling molecules are derived from different signalling pathways and may not only participate in the malignant transformation of hepatocytes but also become early diagnostic indicators of hepatocarcinogenesis or specific targeted molecules for hepatocellular carcinoma *** article reviews recent progress in the study of several signalling molecules as sensitive biomarkers for monitoring hepatocarcinogenesis.

关键词： Hepatocarcinogenesis Cell signals Specific biomarkers Early diagnosis

The Mixed-Mode Fatigue Crack Propagation Model of Piezoelectric Materials Under Electric Fatigue Loading by the Jk-Integral

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Acta Mechanica Solida Sinica 2024年第4期37卷 634-641页

作者： Xianghua Chen Chunguang Wang qun li The Institute of Xi’an Aerospace Solid Propulsion Technology Xi’an710025China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an710049China

The electric fatigue load has a significant effect on the crack propagation behavior and failure life of piezoelectric materials and devices. In this paper, an electrical mixed-mode fatigue crack propagation model for piezoelectric materials is proposed based on the piezoelectric Jk-integral theory. The crack initiation, propagation, and life prediction criteria of piezoelectric materials under electric fatigue loading are given by this model, and the finite element simulation model is established to study the electrical mixed-mode crack propagation behavior of piezoelectric structures. Meanwhile, the electrical mixed-mode fatigue crack propagation model is applied to the fatigue crack propagation behavior of a piezoelectric typical defective structure, the crack–hole interference model. The mixed-mode crack propagation, fatigue life, and the interference behavior between the crack and hole at various hole locations of the crack–hole interference model are well recognized by this model. The crack propagation behavior under different electrical load intensities is also considered. The results show that the hole in front of the crack tip inhibits crack propagation to a certain extent, and the strength of electrical load affects the fatigue life of piezoelectric materials and structures. Therefore, the proposed electrical mixed-mode fatigue crack propagation model provides a reference for predicting the mixed-mode fatigue crack propagation behavior and fatigue life of piezoelectric structures under electric fatigue loading.

关键词： Configurational force J k-integral Piezoelectric Mixed-mode crack propagation life prediction

Meta label associated loss for fine-grained visual recognition

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Science China(Information Sciences) 2024年第6期67卷 230-247页

作者： Yanchao li Fu XIAO Hao li qun li Shui YU School of Computer Science Nanjing University of Posts and Telecommunications School of Network Engineering Zhoukou Normal University School of Computer Science University of Technology Sydney

Recently, intensive attempts have been made to design robust models for fine-grained visual recognition, most notably are the impressive gains for training with noisy labels by incorporating a reweighting strategy into a meta-learning framework. However, it is limited to up or downweighting the contribution of an instance for label reweighting approaches in the learning process. To solve this issue, a novel noise-tolerant method with auxiliary web data is proposed. Specifically, first, the associations made from embeddings of well-labeled data with those of web data and back at the same class are measured. Next, its association probability is employed as a weighting fusion strategy into angular margin-based loss, which makes the trained model robust to noisy datasets. To reduce the influence of the gap between the well-labeled and noisy web data, a bridge schema is proposed via the corresponding loss that encourages the learned embeddings to be coherent. Lastly, the formulation is encapsulated into the meta-learning framework, which can reduce the overfitting of models and learn the network parameters to be noise-tolerant. Extensive experiments are performed on benchmark datasets, and the results clearly show the superiority of the proposed method over existing state-of-the-art approaches.

关键词： label associated loss weighting noisy samples fine-grained visual recognition noise-tolerant learning meta-learning

Data-driven active vibration control for helicopter with trailing-edge flaps using adaptive dynamic programming

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Chinese Journal of Aeronautics 2024年第6期37卷 151-166页

作者： Yu CHEN qun ZONG Xiuyun ZHANG Jinna li School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Information and Control Engineering Liaoning Petrochemical UniversityFushun 113001China

The helicopter Trailing-Edge Flaps(TEFs)technology is one of the recent hot topics in morphing wing *** employing controlled deflection,TEFs can effectively reduce the vibration level of ***,designing specific vibration reduction control methods for the helicopters equipped with trailing-edge flaps is of significant practical *** paper studies the optimal control problem for helicopter-vibration systems with TEFs under the framework of adaptive dynamic programming combined with Reinforcement Learning(RL).Time-delay and disturbances,caused by complexity of helicopter dynamics,inevitably deteriorate the control performance of vibration *** solve this problem,a zero-sum game formulation with a linear quadratic form for reducing vibration of helicopter systems is presented with a virtual *** this context,an off-policy reinforcement learning algorithm is developed to determine the optimal control *** algorithm utilizes only vertical vibration load data to achieve a policy that reduces vibration,attains Nash equilibrium,and addresses disturbances while compensating for time-delay without knowledge of the dynamics of the helicopter *** effectiveness of the proposed method is demonstrated in a virtual platform.

关键词： Active control Adaptive dynamic program-ming Helicopter rotor Vibration control Zero-sum game