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Ligand-controlled electrochemiluminescence generation from CdSe/CdS/ZnS core/shell/shell quantum dots

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Nano Research 2024年第8期17卷 7776-7785页

作者： Hui Sun Zhiyuan cao Haiyan Qin Xiaogang Peng Bin Su Key Laboratory of Excited-State Materials of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310058China

The CdSe/CdS/ZnS core/shell/shell quantum dots(QDs)with strong exciton confinement have manifested themselves as competitive light-emitting materials in electrochemiluminescence(ECL).However,cathodic ECL generation by these QDs requires the injection of electron and hole from solid electrode and electrogenerated radicals(for example SO_(4)•^(−)),which is inevitably influenced by not only the inorganic structure of QDs but also the organic ligands on the *** this work we aimed at studying the impact of surface organic ligands on ECL performance of CdSe/CdS/ZnS *** changing the surface ligand from oleate to acetate,we phenomenologically observed the positive shift of ECL onset potential by ca.200 mV and the increase of ECL intensity by~100 times,suggesting that a short ligand is more favorable for ECL *** further comprehend the ligand effect,we measured the charge injection kinetics using potential-modulated,time-resolved photoluminescence,and thinlayer spectroelectrochemistry *** electron and hole injection into QDs were found to be accelerated by 2–20 times if shortening the ligand from oleate to acetate,confirming the significant impact of surface ligands on ECL performance of *** study is expected to provide guidance on how to design surface functionalized QDs for specific applications such as ECL immunodiagnosis,photocatalysis,and photovoltaics.

关键词： electrochemiluminescence quantum dots spectroelectrochemistry surface ligands charge injection charge transfer

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基于改进BET的MRI脑组织自动提取算法

东北大学学报（自然科学版） 2018年第2期39卷 186-189,210页

作者：杨金柱陆琳曹鹏赵大哲东北大学计算机科学与工程学院辽宁沈阳110169 东北大学医学影像计算教育部重点实验室辽宁沈阳110169

提出一种基于改进BET(brain extraction tool)的MRI脑组织自动提取算法.首先,该算法结合图像梯度信息能够估计出更为准确的脑重心(center of gravity,COG);其次,该算法构建了新的脑表面形变力,在垂直于脑表面切线的扩张力中引入了边缘力... 详细信息

提出一种基于改进BET(brain extraction tool)的MRI脑组织自动提取算法.首先,该算法结合图像梯度信息能够估计出更为准确的脑重心(center of gravity,COG);其次,该算法构建了新的脑表面形变力,在垂直于脑表面切线的扩张力中引入了边缘力,该力很好地抑制了脑组织的边界泄漏和过度分割问题.使用本文方法对MRI脑影像进行了自动脑组织提取,实验结果表明,本文算法能够自动获得更加准确的脑组织提取结果,特别是在脑组织边缘处,本文算法与BET算法相比,提取结果更准确.

关键词：脑组织提取磁共振图像脑组织提取工具脑重心边缘力

Hydrogen bond-bridged phosphorene flexible film for photodynamic inhibiting Staphylococcus aureus

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Nano Research 2024年第6期17卷 5461-5468页

作者： Ziyu Wei Wenting Li Zhifang Liu Yongfa Zhu Huaqiang cao Department of Chemistry Engineering Research Center of Advanced Rare Earth MaterialsTsinghua UniversityBeijing 100084China

Antibiotics are a widely used and effective treatment for bacterial ***,bacteria can gradually evolve during infection,leading to developing resistance to antibiotics,which renders previously effective treatments *** a useful and convenient manner to treat bacterial infections is a great ***,we report a flexible hydrogen-bond-bridged phosphorene film with photodynamic antibacterial properties and excellent mechanical properties,fabricated from electrochemical exfoliation of black phosphorus(BP).When illuminated under 700 nm light,the hydrogen bond-bridged phosphorene flexible film is capable of converting ground-state triplet oxygen(O_(2))into excited-state singlet oxygen(^(1)O_(2)),destroying the structure of the membrane of Staphylococcus aureus,and eventually leading to bacterial death,via breaking the C=C of unsaturated fatty acids within the bacterial cell membrane after the reaction between^(1)O_(2)and unsaturated fatty acids,thus realizing a highly efficient antibacterial approach,which is supported by gas chromatography-mass spectrometry(GC-MS)*** work establishes an effective phototherapy platform for treating bacterial traumatic infections.

关键词： hydrogen bond-bridged phosphorene flexible film photodynamic Staphylococcus aureus

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基于稳定域仿真的切削稳定性预测研究

组合机床与自动化加工技术 2016年第1期 105-107,111页

作者：曹力钟建琳北京信息科技大学机电学院北京100192

文章基于稳定域仿真建立稳定性预测系统。首先根据切削稳定性颤振机理及切削稳定域仿真技术研究影响切削稳定性的因素,并对稳定性叶瓣图进行优化。然后在此基础上建立切削加工稳定性预测系统。最后通过实例说明稳定性叶瓣图的用途,为切... 详细信息

文章基于稳定域仿真建立稳定性预测系统。首先根据切削稳定性颤振机理及切削稳定域仿真技术研究影响切削稳定性的因素,并对稳定性叶瓣图进行优化。然后在此基础上建立切削加工稳定性预测系统。最后通过实例说明稳定性叶瓣图的用途,为切削加工工艺人员提供合理的参数选择依据。

关键词：稳定域仿真切削稳定性稳定性叶瓣图

Caulis Sargentodoxae Prescription Inhibits Angiogenesis-related Cytokines in a Rat Endometriosis Model

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Reproductive and Developmental Medicine 2017年第4期1卷 189-197页

作者： Meng-Fei Zhuang Yang cao Yan Shi lin Yu Ya-Nan Niu Ting-Ting Zhang Zhao-Gui Sun Department of Gynecology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China Key Laboratory of Reproduction Regulation of NPFPC SIPPRIRDFudan UniversityShanghai 200032China

Background:To determine the efficacy of the Caulis Sargentodoxae prescription,which is an empirical formula of Chinese herbs and has definite curative effects on ***:The Caulis Sargentodoxae prescription on the growth of ectopic endometria was studied with a rat endometriosis(EMS)*** EMS model was established by autoplastic *** study the curative effects of Chinese medicine on EMS in comparison with western medicine,gestrinone and an angiogenesis inhibitor were *** rats were randomly divided into seven groups:normal group,model group,ovariectomized group,gestrinone(western medicine)group,Caulis Sargentodoxae prescription(Chinese medicine)group,apatinib(inhibitor)group,and combination(Chinese medicine+inhibitor)*** administration for 21 days,the growth inhibitory rates of ectopic endometria in the treatment groups were evaluated,and the levels of vascular endothelial growth factor(VEGF)and VEGF receptor-2(VEGFR2)were detected by ELISA in the serum and peritoneal fluid,as well as in the ectopic endometrial tissues by real-time polymerase chain reaction and Western ***:The growth inhibitory rates of ectopic endometria in the treatment groups were significantly higher(Plinical reference for endometriotic pathogenesis and treatment,and the Caulis Sargentodoxae prescription has reliable therapeutic effects on EMS for its target-action ability to decrease angiogenesis.

关键词： Angiogenesis Caulis Sargentodoxae Prescription Endometriosis Rat Model

放射性核素功能显像在原发性醛固酮增多症中的研究进展

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中华内分泌代谢杂志 2021年第11期37卷 1025-1028页

作者：曹登敏林美福陈刚福建省立医院核医学科福州350000 福建省立医院内分泌科福州350000

原发性醛固酮增多症(primary aldosteronism,PA)是常见的继发性高血压病因,区分单、双侧肾上腺病变在PA治疗方案选择中至关重要。虽然肾上腺静脉采血(AVS)已被指南推荐为"金标准",但存在侵入性、技术难度大等局限性。无创功能显像成为... 详细信息

原发性醛固酮增多症(primary aldosteronism,PA)是常见的继发性高血压病因,区分单、双侧肾上腺病变在PA治疗方案选择中至关重要。虽然肾上腺静脉采血(AVS)已被指南推荐为"金标准",但存在侵入性、技术难度大等局限性。无创功能显像成为一种选择。11C-MTO、123I-IMTO以及68Ga-pentixafor与传统碘胆固醇显像剂相比,具有较高的特异性,在缩短获取图像时间、减少对患者的辐射暴露和提高图像分辨率方面更具优势。但这些新型的功能显像剂在识别直径小于1 cm腺瘤的灵敏度方面存在局限性,有待进一步研究。本文将对放射性核素功能显像在PA诊断中的研究及进展作详细评述。

关键词：原发性醛固酮增多症诊断功能显像 PET/CT

Parameter Effects of the Potential‑Field‑Driven Model Predictive Controller for Shared Control

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Automotive Innovation 2023年第1期6卷 48-61页

作者： Mingjun Li Chao Jiang Xiaolin Song Haotian cao State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

Parameter effects of the potential-field-driven model predictive control(PF-MPC)method on performances of shared control systems during obstacles avoidance are *** PF-MPC controllers of autonomous driving and shared control systems are designed based on the constructed potential fields and model predictive control method,and the driver-vehicle dynamics and the driver-related costs are also considered in the design of the shared *** explore a potential approach of alleviating driver-automation conflicts of the shared control systems,different motion planning results generated by the PF-MPC controller are explored by adjusting effects of potential fields’parameters,which provides possibilities to decrease driver-automation conflicts between the planned trajectory and driver’s target ***,two case studies are designed to discuss different frameworks and parameters effects on shared control *** show that the proposed shared control frameworks considering driver-vehicle dynamics and the driver-related cost show better performances regarding driver-automation conflicts management and driving safety than the decentralized control *** the longitudinal normalized constant of potential fields parameters shows influences on the driver-automation conflicts management and driving safety performances of shared control.

关键词： PF-MPC method Potential field Parameter effect Driver-automation conflict

Analytical solution for vertical site response analysis and its validation

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Earthquake Engineering and Engineering Vibration 2019年第1期18卷 53-60页

作者： Liu Junwei Zhang Xiao cao Zewei Han Bo Yang Shizeng School of Civil Engineering Qingdao University of Technology School of Civil Engineering Shandong University Nantong Municipal Engineering Design Institute Co. Ltd. Huangdao Municipal Water Resources Bureau

Existing studies for site response analysis in geotechnical earthquake engineering have widely concentrated on the horizontal component of the ground motion. However, strong vertical ground motions have been repeatedly observed, resulting in significant vertical compression damage of engineering structures. Furthermore, for the seismic design of critical structures(e.g. large-scale dams and nuclear power plants), the ground motions in all three directions should be considered. Therefore, there is a need to investigate the site response subjected to the vertical component of the ground motion, especially for the seismic design of critical structures. Consequently, in this study, a numerical program for vertical site response analysis is proposed based on the commonly used analytical transfer function method. The proposed program is then validated against well-documented case studies obtained from the Japanese KiK-net(Kiban Kyoshin network) downhole array monitoring system. Results show that the response spectra at the ground surface are well predicted in the low frequency range(<5 Hz), while discrepancies are observed in the high frequency range. However, the high frequency discrepancies do not significantly affect the overall prediction accuracy, as the overall seismic response of geotechnical structures are usually dominated by low frequency vibrations. Furthermore, the limitations in the analysis are also discussed.

关键词： site response analysis vertical ground motions transfer function analytical solution

基于LO-EKF算法的分布驱动电动汽车状态估计的研究

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汽车工程 2014年第11期36卷 1316-1320页

作者：林程王刚曹万科周逢军北京理工大学、电动车辆国家工程实验室北京100081 山东交通学院汽车工程学院济南250023

本文中对分布式驱动电动汽车的状态估计进行研究。首先利用龙伯格状态观测器实时观测对车辆的状态估计影响较大的路面坡度,接着,提出了采用扩展卡尔曼滤波算法,以车辆ESP传感器所获取的数据信息作为观测值,对分布式驱动电动汽车的动力... 详细信息

本文中对分布式驱动电动汽车的状态估计进行研究。首先利用龙伯格状态观测器实时观测对车辆的状态估计影响较大的路面坡度,接着,提出了采用扩展卡尔曼滤波算法,以车辆ESP传感器所获取的数据信息作为观测值,对分布式驱动电动汽车的动力学状态变量进行估计。最后进行Carsim和MATLAB联合仿真。结果表明,基于扩展卡尔曼滤波和龙伯格观测器的车辆状态估计算法能较好的估算出车辆的相关动力学状态值,算法可行,收敛速度较快。

关键词：分布式驱动电动汽车车辆状态估计坡度观测扩展卡尔曼滤波器龙伯格观测器