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O_(2)在金团簇阳离子上的吸附:键合强度和活化程度的分析

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Chinese Journal of Chemical Physics 2024年第2期37卷 351-360,I0040-I0052,I0104页

作者：胡瑾黄璐璐刘文金正千王雪峰邢小鹏同济大学化学科学与工程学院上海200092

本文结合团簇反应动力学实验和量子化学计算,研究了O_(2)在金团簇阳离子上的吸附与活化.实验发现,在温和条件下,Au_(10)^(+)能快速吸附单个O_(2)分子形成Au_(10)O_(2)^(+);Au_(2)^(+)和Au_(4)^(+)的反应性则较低,但相应的氩络合物Au_(2)... 详细信息

本文结合团簇反应动力学实验和量子化学计算,研究了O_(2)在金团簇阳离子上的吸附与活化.实验发现,在温和条件下,Au_(10)^(+)能快速吸附单个O_(2)分子形成Au_(10)O_(2)^(+);Au_(2)^(+)和Au_(4)^(+)的反应性则较低,但相应的氩络合物Au_(2)ArO_(2)^(+)和Au_(4)Ar_(1,2)O_(2)^(+)很容易形成;除此之外,其他尺寸的团簇都表现出反应惰性.理论计算表明,O_(2)倾向于以端接的方式吸附在具有线型或平面型结构的Au_(n)^(+)(n=2~7)簇和Au_(8)^(+)的平面异构体上,并表现出极低的活化程度吸附在具有三维结构的Au_(n)^(+)(n=9,11,13)簇上的O_(2)也呈现出类似的特征。与此形成鲜明对比的是,在Au_(8)^(+)的三维异构体和n=10,12,14的偶数大尺寸Au_(n)^(+)上,O_(2)倾向于以侧向桥接的方式吸附并被高度活化.理论预测的O_(2)在团簇上的键合强度结合动力学因素影响,合理地解释了实验中观察到的反应产物Au_(2,4,10)O_(2)^(+),Au_(2)ArO_(2)^(+)和Au_(4)ArO_(2)^(+).

关键词：金簇阳离子飞行时间质谱仪密度泛函理论 O_(2)活化

神经肌肉电刺激预防静脉血栓栓塞症的研究进展

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中华结核和呼吸杂志 2024年第3期47卷 269-274页

作者：梁瑞刘东赵俊歌高倩翟振国北京中医药大学中日友好临床医学院、中日友好医院呼吸中心、呼吸与危重症医学科、国家呼吸医学中心、中国医学科学院呼吸病学研究院、国家呼吸疾病临床研究中心北京100029 北京大学中日友好临床医学院、中日友好医院呼吸中心、呼吸与危重症医学科、国家呼吸医学中心、中国医学科学院呼吸病学研究院、国家呼吸疾病临床研究中心北京100029 中日友好医院呼吸中心、呼吸与危重症医学科、国家呼吸医学中心、中国医学科学院呼吸病学研究院、国家呼吸疾病临床研究中心北京100029

目前静脉血栓栓塞症(VTE)最常用的预防措施是药物预防,但高出血风险限制了部分患者药物预防的应用。单独或联合使用机械预防是高出血风险患者预防VTE的重要方式,但现有主流机械预防中的分级加压弹力袜、间歇充气加压泵、足底静脉加压泵... 详细信息

目前静脉血栓栓塞症(VTE)最常用的预防措施是药物预防,但高出血风险限制了部分患者药物预防的应用。单独或联合使用机械预防是高出血风险患者预防VTE的重要方式,但现有主流机械预防中的分级加压弹力袜、间歇充气加压泵、足底静脉加压泵均存在一定局限性,如接触面积较大导致患者佩戴产生不适,甚至影响患者的日常活动。神经肌肉电刺激(NMES)是一种新型的穿戴式电子设备,被证实可能通过改善局部血流、减少血液淤滞有效预防VTE。临床研究发现NMES联合药物预防可能较单独药物预防在VTE预防中具有更好的有效性和安全性,且单独使用NMES的预防作用不劣于单独使用其他机械预防措施,同时NMES具有佩戴方便、舒适的优点,但国内尚未将其纳入常规机械预防措施。本文将对其在VTE预防中的原理、临床研究进展及前景进行介绍。

关键词：神经肌肉电刺激静脉血栓栓塞症血液淤滞临床研究进展局部血流药物预防常规机械有效性和安全性

核壳结构上转换发光纳米粒子的合成及用于细胞色素C的检测

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分析科学学报 2024年第2期40卷 125-131页

作者：董佳瑶易静刘浏于贺唐宏武武汉大学化学与分子科学学院湖北武汉430072

本工作合成了三层核壳结构的上转换发光纳米粒子,其中第一层是惰性核,第二层为发光层,为了增强上转换发光强度,又在表面包覆了第三层惰性壳层。该材料粒径均一、分散性良好,其发光层厚度约为2.4nm,惰性壳层厚度约为2.9nm。在其表面修饰... 详细信息

本工作合成了三层核壳结构的上转换发光纳米粒子,其中第一层是惰性核,第二层为发光层,为了增强上转换发光强度,又在表面包覆了第三层惰性壳层。该材料粒径均一、分散性良好,其发光层厚度约为2.4nm,惰性壳层厚度约为2.9nm。在其表面修饰了细胞色素C的适配体链及互补链,在适配体的3’端修饰了BHQ3基团,能够猝灭上转换纳米粒子在655nm波长处的发光。当细胞色素C存在时,适配体与细胞色素C结合从而离开其表面,使655nm处的发光恢复。在检测过程中,540nm处的发光强度不会发生变化,可以用作细胞色素C的比率荧光检测。结果表明,当细胞色素C浓度在5~80μmol/L范围时,发光信号恢复程度与细胞色素C浓度呈线性相关,相关系数为0.998,检出限为1μmol/L。所建立方法可为细胞色素C的荧光检测提供一种新的技术思路。

关键词：上转换发光纳米粒子细胞色素C 发光共振能量转移

Extended context-based semantic communication system for text transmission

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Digital Communications and Networks 2024年第3期10卷 568-576页

作者： Yueling liu Shengteng Jiang Yichi Zhang Kuo Cao Li Zhou Boon-Chong Seet Haitao Zhao Jibo Wei College of Electronic Science and Technology National University of Defense TechnologyChangsha410073China Department of Electrical and Electronic Engineering Auckland University of TechnologyAucklandNew Zealand

Context information is significant for semantic extraction and recovery of messages in semantic ***,context information is not fully utilized in the existing semantic communication systems since re-lationships between sentences are often *** this paper,we propose an Extended Context-based Semantic Communication(ECSC)system for text transmission,in which context information within and between sentences is explored for semantic representation and *** the encoder,self-attention and segment-level relative attention are used to extract context information within and between sentences,*** addition,a gate mechanism is adopted at the encoder to incorporate the context information from different *** the decoder,Transformer-XL is introduced to obtain more semantic information from the historical communication processes for semantic *** results show the effectiveness of our proposed model in improving the semantic accuracy between transmitted and recovered messages under various channel conditions.

关键词： semantic communication extended context Transformer-XL

Research on a fiber sensing system for metal ion detection based on SPF-PCF-SPF structure and coated LPFG

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Optoelectronics Letters 2024年第4期20卷 211-215页

作者： GUO Junqi ZHOU Yanfang ZHENG wenyue XU Qianwen liu Yu LI Renpu Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China Chongqing Engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Posts and TelecommunicationsChongqing 400065China

In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water,a fluid ion detection system is *** consists of a side-polished fiber-assisted fluid structure and a long-period fiber grating(LPFG)coated with a metal chelating agent *** this study,both theoretical and experimental investigations are conducted to examine the sensing characteristics of the system towards copper ion and iron ion *** results demonstrate that under the premise of ensuring solution flow,the system can achieve specific identification of different types of heavy metal ***,it exhibits concentration sensing sensitivities of 9.23×10^(4) mL·nm/mol and 7.13×10^(4) mL·nm/mol for copper sulfate(CuSO_(4))and ferric chloride(FeCl_(3))solutions,***,this sensing system offers the potential for real-time detection of metal ions.

关键词： system fiber structure

Memristive feature and mechanism induced by laser-doping in defect-free 2D semiconductor materials

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Journal of Semiconductors 2024年第7期45卷 85-91页

作者： Xiaoshan Du Shu Wang Qiaoxuan Zhang Shengyao Chen Fengyou Yang Zhenzhou liu Zhengwei Fan Lijun Ma Lei Wang Lena Du Zhongchang Wang Cong Wang Bing Chen Qian liu College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266590China National Center for Nanoscience and Technology&University of Chinese Academy of Sciences Beijing 100190China Hebei University of Water Resources and Electric Engineering Electrical Automation Department Cangzhou 061001China The MOE Key Laboratory of Weak-Light Nonlinear Photonics and International Sino-Slovenian Join Re-search Center on Liquid Crystal Pho-tonics TEDA Institute of Applied Physics and School of PhysicsNankai UniversityTianjin 300457China College of Mathematics and Physics Shandong Advanced Optoelectronic Materials and Technologies Engineering LaboratoryQingdao Uni-versity of Science and TechnologyQingdao 266061China Department of Physics Capital Normal UniversityBeijing 100048China Department of Advanced Materials and Computing International Iberian Nanotechnology Laboratory(INL)4715-330 BragaPortugal College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China

Memristors as non-volatile memory devices have gained numerous attentions owing to their advantages in storage,in-memory computing, synaptic applications, etc. In recent years, two-dimensional(2D) materials with moderate defects have been discovered to exist memristive feature. However, it is very difficult to obtain moderate defect degree in 2D materials, and studied on modulation means and mechanism becomes urgent and essential. In this work, we realized memristive feature with a bipolar switching and a configurable on/off ratio in a two-terminal MoS_(2) device(on/off ratio ~100), for the first time, from absent to present using laser-modulation to few-layer defect-free MoS_(2)(about 10 layers), and its retention time in both high resistance state and low resistance state can reach 2×10^(4) s. The mechanism of the laser-induced memristive feature has been cleared by dynamic Monte Carlo simulations and first-principles calculations. Furthermore, we verified the universality of the laser-modulation by investigating other 2D materials of TMDs. Our work will open a route to modulate and optimize the performance of 2D semiconductor memristive devices.

关键词： 2D-material memristor laser doping laser direct writing memristive mechanism

Electrochemical protein biosensors for disease marker detection:progress and opportunities

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Microsystems & Nanoengineering 2024年第3期10卷 1-20页

作者： Lanpeng Guo Yunong Zhao Qing Huang Jing Huang Yanbing Tao Jianjun Chen Hua-Yao Li Huan liu School of Integrated Circuits Wuhan National Laboratory for OptoelectronicsOptics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Integrated CircuitsAnhui UniversityHefei 230601China School of Optoelectronic Materials and Technology Jianghan UniversityWuhan 430056China Department of Otorhinolaryngology Union HospitalTongji Medical CollegeHuazhong University of Science and Technology1277 Jiefang AvenueWuhan 430022China wenzhou Institute of Advanced Manufacturing Technology Huazhong University of Science and TechnologyWenzhou 325000China

The development of artificial intelligence-enabled medical health care has created both opportunities and challenges for next-generation biosensor *** are extensively used as biological macromolecular markers in disease diagnosis and the analysis of therapeutic *** protein biosensors have achieved desirable specificity by using the specific antibody–antigen binding principle in ***,the active centers of protein biomarkers are surrounded by a peptide matrix,which hinders charge transfer and results in insufficient sensor ***,electrode-modified materials and transducer devices have been designed to increase the sensitivity and improve the practical application prospects of electrochemical protein *** this review,we summarize recent reports of electrochemical biosensors for protein biomarker *** highlight the latest research on electrochemical protein biosensors for the detection of cancer,viral infectious diseases,inflammation,and other *** corresponding sensitive materials,transducer structures,and detection principles associated with such biosensors are also addressed ***,we present an outlook on the use of electrochemical protein biosensors for disease marker detection for the next few years.

关键词： diagnosis specificity Electrochemical

YOLOP:You Only Look Once for Panoptic Driving Perception

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Machine Intelligence Research 2022年第6期19卷 550-562页

作者： dong Wu Man-wen Liao Wei-Tian Zhang Xing-Gang Wang Xiang Bai wen-Qing Cheng wen-Yu liu Hubei Key Laboratory of Smart Internet Technology School of Electronic Information and CommunicationsHuazhong University of Science and TechnologyWuhan 430074China School of Electronic Information and Communication Huazhong University of Science and TechnologyWuhan 430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China

A panoptic driving perception system is an essential part of autonomous driving.A high-precision and real-time perception system can assist the vehicle in making reasonable decisions while *** present a panoptic driving perception network(you only look once for panoptic(YOLOP))to perform traffic object detection,drivable area segmentation,and lane detection *** is composed of one encoder for feature extraction and three decoders to handle the specific *** model performs extremely well on the challenging BDD100K dataset,achieving state-of-the-art on all three tasks in terms of accuracy and ***,we verify the effectiveness of our multi-task learning model for joint training via ablative *** our best knowledge,this is the first work that can process these three visual perception tasks simultaneously in real-time on an embedded device Jetson TX2(23 FPS),and maintain excellent *** facilitate further research,the source codes and pre-trained models are released at https://***/hustvl/YOLOP.

关键词： Driving perception multitask learning traffic object detection drivable area segmentation lane detection

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论债权人撤销权的实现

中国海洋大学学报（社会科学版） 2024年第1期 63-71页

作者：刘东解丹华东政法大学法律学院上海201620 天津市高级人民法院天津300100

债权人撤销权判决在不同场合下,或者具有回复物权的效力,或者具有请求返还不当得利的效力。对于前者,债务人可基于物权请求权要求相对人返还原物,撤销权判决因而获得了强制执行力。债务人若怠于追回原物,债权人可直接申请强制执行为相... 详细信息

债权人撤销权判决在不同场合下,或者具有回复物权的效力,或者具有请求返还不当得利的效力。对于前者,债务人可基于物权请求权要求相对人返还原物,撤销权判决因而获得了强制执行力。债务人若怠于追回原物,债权人可直接申请强制执行为相对人占有的财物。对于后者,债务人须另行主张权利,撤销权判决无强制执行力。债务人若怠于行使权利,债权人可代位提起返还不当得利等诉讼。当债务人与相对人借助诉讼方式诈害债权并获得了相关裁判文书时,债权人则只能借助第三人撤销之诉来保全债权。由于第三人撤销之诉判决本身不具备执行的条件,债务人若怠于追回其责任财产,债权人同样需要代位提起不当得利返还等诉讼,或者代位申请执行回转。

关键词：债权人撤销权强制执行第三人撤销之诉