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Boosting K-ion kinetics by interfacial polarization induced by amorphous MoO_(3-x)for MoSe_(2)/MoO_(3-x)@rGO composites

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Journal of Materials Science & Technology 2022年第20期115卷 232-240页

作者： Jiangshao Yang liwen liu Daoyi Wang Jianming Tao Yanming Yang Jiaxin Li Yingbin Lin Zhigao Huang College of Physics and Energy Fujian Normal UniversityFuzhou 350117China Fujian Provincial Solar Energy Conversion and Energy Storage Engineering Technology Research Center Fuzhou 350117China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fuzhou 350117China

Promoting interfacial reaction kinetics is highly desirable for achieving high-performances of anode material in alkali-ion ***,flower-like MoSe_(2)/MoO_(3-x)@r GO composites are fabricated by a facile solvothermal method involving a thermal-treatment at 800°*** evaluated as an anode material for potassium ion batteries,MoSe_(2)/MoO_(3-x)@r GO delivers 248.2 m A h g^(-1)after 50 cycles at 0.2 A g^(-1) with a capacity retention of 84.6%and 182.9 m A h g^(-1)after 150 cycles at 1.0 A g^(-1) with a capacity retention of almost 61.2%,superior to those of bare MoSe_(2)or MoSe_(2)@r GO *** from electrochemical measurements,the amorphous MoO_(3-x)containing oxygen vacancies could not only effectively buffer the self-aggregation of MoSe_(2)nanosheets but also provides lots of accessible active sites for potassium ion ***,the open channels in the amorphous MoO_(3-x) phase lead to easier ion hopping and smaller diffusion ***,the built-in electric field at the interface would be beneficial for electron transfer and K-ion migration across the hetero-junction ***,larger dielectric polarization induced by the high relative permittivity of amorphous MoO_(3-x) would reduce charge transfer resistance and enhance K-ion migration across electric *** work provides new insight into the enhanced performance of anode material coated by an amorphous layer with large relative permittivity.

关键词： Potassium ion batteries MoSe_(2) Amorphous Work function Heterojunction interface

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GeeNet:robust and fast point cloud completion for ground elevation estimation towards autonomous vehicles

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Frontiers of Information Technology & Electronic Engineering 2024年第7期25卷 938-950页

作者： liwen liu Weidong YANG Ben FEI Shanghai Key Laboratory of Data Science School of Computer ScienceFudan UniversityShanghai 200433China Zhuhai Fudan Innovation Institute Zhuhai 519000China

Ground elevation estimation is vital for numerous applications in autonomous vehicles and intelligent robotics including three-dimensional object detection,navigable space detection,point cloud matching for localization,and registration for ***,most works regard the ground as a plane without height information,which causes inaccurate manipulation in these *** this work,we propose GeeNet,a novel end-to-end,lightweight method that completes the ground in nearly real time and simultaneously estimates the ground elevation in a grid-based *** leverages the mixing of two-and three-dimensional convolutions to preserve a lightweight architecture to regress ground elevation information for each cell of the *** the first time,GeeNet has fulfilled ground elevation estimation from semantic scene *** use the SemanticKITTI and SemanticPOSS datasets to validate the proposed GeeNet,demonstrating the qualitative and quantitative performances of GeeNet on ground elevation estimation and semantic scene completion of the point ***,the crossdataset generalization capability of GeeNet is experimentally *** achieves state-of-the-art performance in terms of point cloud completion and ground elevation estimation,with a runtime of 0.88 ms.

关键词： Point cloud completion Ground elevation estimation Real-time Autonomous vehicles

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Modeling and optimization of emergency distribution in plateau area

Modeling and optimization of emergency distribution in plate...

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第37届中国控制会议

作者： Ming liu liwen liu School of Economics and Management Nanjing University of Science and Technology

Due to the special environment of emergency rescue in plateau area, plateau reaction is an inevitable influence factor. However, few of the existing literatures focus on this topic. In this paper, the Yushu earthquake in Qinghai Province is used as our example, and the traditional optimization model for emergency distribution is improved by incorporating an influence coefficient of plateau reaction. The problem is formulated as a multi-objective mixed integer programming model and an effective genetic algorithm is designed to solve it. Test results demonstrate that the proposed model can efficiently distribute emergency materials to the demand points within 72 hours after the earthquake.

关键词： Emergency logistics Yushu earthquake plateau reaction genetic algorithm path optimization

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Expression, refolding and preliminary characterization of recombinant snake venom metalloproteinases: Implica- tion for the hemorrhagic mechanism

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Chinese Science Bulletin 2003年第19期48卷 2055-2060页

作者： XIANG Kaijun, ZOU Chunsen, ZHU Zhiqiang, TENG Maikun, NIU liwen & liu Jing School of Life Science, University of Science and Technology of China, Hefei 230027, China School of Life Science University of Science and Technology of China Hefei 230027 China Yarmouk University Irbid - Jordan

Two cDNAs encoding hemorrhagic snake venom metalloproteinase acutolysin A and non-hemorrhagic metalloproteinase (BR) were cloned into the expression vector pET-22b, respectively, and the corresponding two recombinant proteins, A-22b and BR-22b, were produced in inclusion bodies in E. coli BL21(DE3). The recombinant proteins were then subjected to solubilization, purification and refolding in vitro. A-22b showed hemorrhagic activity but no detectable proteolytic activities toward fibrinogen and fibronectin. Natural acutolysin A had both hemorrhagic activity and proteolytic activity toward these substrates. BR-22b showed the proteolytic activities toward fibrinogen, but no hemorrhagic activity. In addition, two chimeric genes, C1 and C2, were constructed and cloned into pET-22b, and the corresponding recombinant proteins, C1-22b and C2-22b, were also expressed in inclusion bodies. C1-22b involved N-terminal 110 amino acids of BR and C-terminal 95 amino acids of acutolysin A, while C2-22b contained N-terminal 108 amino acids of acutolysin A and C-terminal 112 amino acids of BR. The biological activities of C2-22b and C1-22b were similar to those of A-22b and BR-22b, respectively. Our results suggested that N-terminal major subdomain of a snake venom metalloproteinase might play a key role in hemorrhagic activity and have an appreciable effect on the selectivity for protein substrates.

关键词：细胞重组蛇毒液金属蛋白酶出血性机制 cDNAs 自溶素蛋白水解活性

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High-performance piezoresistive sensors based on transfer-free large-area PdSe_(2) films for human motion and health care monitoring

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InfoMat 2024年第1期6卷 139-149页

作者： Rui Zhang Jie Lin Tao He Jiafang Wu Zhuojun Yang liwen liu Shaofeng Wen Yimin Gong Haifeng Lv Jing Zhang Yi Yin Fangjia Li Changyong Lan Chun Li State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengduthe People's Republic of China School of Physics University of Electronic Science and Technology of ChinaChengduthe People's Republic of China Sichuan Academy of Medical Sciences and Sichuan People's Hospital Chengduthe People's Republic of China School of Medicine University of Electronic Science and Technology of ChinaChengduthe People's Republic of China

Two-dimensional transition metal dichalcogenides(TMDs)are needed in highperformance piezoresistive sensors due to their strong strain-induced bandgap modification and thereby large gauge ***,integrating a conventional high-temperature chemical vapor deposition(CVD)-grown TMD with a flexible substrate necessitates a transfer process that inevitably degrades the sensing properties of the TMDs and increases the overall fabrication *** present a high-performance piezoresistive strain sensor that employs largearea PdSe_(2) films grown directly on polyimide(PI)substrates via plasma-assisted selenization of a sputtered Pd *** reliable strain transfer from the substrate to the PdSe_(2) film ensures an outstanding strain-sensing capability of the ***,the sensors have a gauge factor of up to315±2.1,a response time under 25 ms,a detection limit of 8×10^(-6),and an exceptional stability of over 104 loadingunloading *** attaching the sensors to the skin surface,we demonstrate their application for measuring physiological parameters in health care monitoring,including motion,voice,and arterial pulse ***,using the PdSe_(2) film sensor combined with deep learning technology,we achieved intelligent recognition of artery temperature from arterial pulse signals with only a 2%difference between predicted and actual *** excellent sensing performance,together with the advantages of low-temperature fabrication and simple device structure,make the PdSe_(2) film sensor promising for wearable electronics and health care sensing systems.

关键词： layered crystal PdSe_(2) piezoresistive effect strain sensor

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Practice of Mind Mapping Technology in"Re-flipped Classroom"Teaching Mode:A Case Study of the Course Principles of Residential District Planning

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Asian Agricultural Research 2020年第12期12卷 80-84页

作者： liwen liu Xiquan CHEN Xiaoyun LI Jianrong ZHANG College of City Construction Jiangxi Normal University Nanchang 330022 China Jiangxi College of Applied Technology Ganzhou 341000 China

The present study proposed the"re-flipped classroom"teaching mode taking the course Principles of Residential District Planning as an *** the Small Private Online Courses(SPOCs)and Massive Open Online Courses(MOOCs)of the iCourse platform,with the aid of the mind mapping technology,the complex content is visualized to the information that can be easily accepted by the brain,to improve the efficiency of thinking problems and apply theories to practical *** results indicate that the teaching mode combined with mind mapping technology has strong appeal,can improve teacher-student interaction,and effectively improve the teaching ***,it came up with recommendations including attaching importance to the"re-flipped classroom"teaching mode,integrating teaching methods,and using online platform *** is concluded that the research of teaching mode has important theoretical and practical significance for ensuring the teaching quality.

关键词： Residential district Flipped classroom Min map Teaching reform

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COMPETITIVE STRATEGIES IN SERVICE OPERATIONS

COMPETITIVE STRATEGIES IN SERVICE OPERATIONS

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The 4th International Conference on Management

作者： liu liwen School of Economics & Management, Tsinghua University, Beijing, China

This paper analyzed features of service competitiveness,discussed applications in theservice operations of general competitive strategies submitted by *** then two types of specialstrategies for the service operations:keeping customers strategy and service recovery strategy, *** detail methods to implement these strategies are given.

关键词： Service competitiveness service operations competitive strategy

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Significance of ultrasound evaluation of carotid atherosclerotic plaque for diagnosing ischemic cerebrovascular disease

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Neural Regeneration Research 2007年第7期2卷 440-442页

作者： Li Gu Yaqin Feng liwen liu Liping Yang Lili He Department of Special Diagnosis Lintong Convalescent Hospital of Lanzhou Military Area Command of Chinese PLA Lintong 710600 Shaanxi Province China Retiree Institute of Shaanxi Military Area Command of Chinese PLA Weinan 720060 Shaanxi Province China Xijing Hospital of Fourth Military Medical University Xi＇an 710032 Shaanxi Province China

BACKGROUND： Carotid artery is the main source for craniocerebral blood supply. Its intimal plaque formation and arterial stenosis degree both are the risk factors for ischemic cerebrovascular ***, the close relationship of carotid atherosclerotic plaque and ischemic cerebrovascular disease, and ultrasound evaluation of carotid atherosclerotic plaque have become the hot spot in studying ischemic cerebrovascular disease.OBJECTIVE： This study was to detect the degree of carotid atherosclerosis of ischemic cerebrovascular disease patients by ultrasonography, and to analyze the situation of carotid atherosclerosis and its relationship with clinic.DESIGN： Clinical randomized concurrent control experiment.SETTING： Lintong Convalescent Hospital of Lanzhou Military Area Command of Chinese PLA.PARTICIPANTS： Totally 60 outpatients and inpatients with ischemic cerebrovascular disease, 42 males and 18 females, admitted to Lintong Convalescent Hospital of Lanzhou Military Area Command of Chinese PLA between January 2006 and December 2006 were involved in the patient group. They met the diagnosis criteria of ischemic cerebrovascular disease constituted by the 4th Cerebrovascular Disease Conference in 1996, and were confirmed to suffer from ischemic cerebrovascular disease by skull CT and MRI. Another 20 subjects who received healthy examination concurrently in the same hospital, 12 males and 8 females, were involved in the control group. Informed consents of detected items were obtained from involved subjects.METHODS： The plaque thickness of mid portion, distal end and crotch of common carotid artery （CCA）,internal carotid artery （ICA）, external carotid artery （ECA） and vertebral artery （VA） of involved subjects,who received health examination was separately detected with color Doppler ultrasonograph （HDI-5000）.Then, total integral of plaque was calculated. The intima-media thickness （IMT） was measured with two-dimensional ultrasonography. The inner diamete

关键词： ischemic cerebrovascular disease arteriosclerosis ultrasonography carotid arteries

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Online Teaching Practice under the Epidemic Situation of Novel Coronavirus Pneumonia

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Asian Agricultural Research 2020年第8期12卷 78-82页

作者： liwen liu Xiquan CHEN Xiaoyun LI Yan ZENG Chunying ZHANG College of City Construction Jiangxi Normal University Nanchang 330022 China Jiangxi College of Applied Technology Ganzhou 341000 China Guilin University of Technology Guilin 541004 China

In the context of preventing and controlling novel coronavirus pneumonia,how to ensure the quality of higher education has become a hot issue of social concern in *** this article,the problems and challenges are analyzed from teacher,student and technology levels,the teaching pattern of"re-flipped classroom"and the teaching model of"SPOC+MOOC+live broadcast"are proposed,the three teaching methods of PBL,OBE and mind mapping are integrated,the teaching evaluation is introduced to teaching design,and finally,the implementation suggestions are put forward to ensure the quality of teaching.

关键词： Online classroom Flipped classroom Mind mapping Epidemic situation Teaching practice

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超声心动图在肥厚型心肌病临床管理中的应用现状与思考

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中华医学超声杂志（电子版） 2020年第5期17卷 385-390页

作者：刘丽文解放军空军军医大学第一附属医院(西京医院)超声医学科解放军空军军医大学第一附属医院(西京医院)肥厚型心肌病国际合作中心陕西省肥厚型心肌病多学科会诊中心西京医院肥厚型心肌病多学科诊治与遗传咨询中心西安710032

肥厚型心肌病(hypertrophic cardiomyopathy,HCM)是最常见的常染色体显性遗传性心肌病[1],其发病率为1/500~1/200[2-3]。HCM表型的显著特征是心肌肥厚、心肌纤维化[4]及心肌壁内微血管病变[5-6],导致左心室流出道梗阻、左心室舒张/收缩... 详细信息

肥厚型心肌病(hypertrophic cardiomyopathy,HCM)是最常见的常染色体显性遗传性心肌病[1],其发病率为1/500~1/200[2-3]。HCM表型的显著特征是心肌肥厚、心肌纤维化[4]及心肌壁内微血管病变[5-6],导致左心室流出道梗阻、左心室舒张/收缩功能异常、心肌微循环障碍等系列病理生理改变,进而引发呼吸困难、胸痛、晕厥,甚至进展为心力衰竭、房颤、卒中、心源性猝死(sudden cardiac death,SCD)等严重后果。值得注意的是,HCM临床表现以及临床进程具有高度异质性,表现为有的患者无显著症状,而有的患者症状显著、后果严重,是青少年和运动员SCD的首要原因[1,7-9]。

关键词：肥厚型心肌病心源性猝死心肌壁超声心动图呼吸困难心肌纤维化胸痛 death

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