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Optimizing 2D-metal contact in layered Tin-selenide via native oxide modulation

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Nano Research 2024年第4期17卷 3014-3020页

作者： Yue Zheng Qi You Zhentian yin Jian Tang ke Jiang Zihao Xie Henan Li Cheng Han Yumeng Shi International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China

The discovery of two-dimensional(2D)semiconductor has opened up new avenues for the development of short-channel field-effect transistors(FETs)with desired electrical *** them,orthorhombic tin-selenide(SnSe)has garnered increasing attention due to its potential applications in a variety of electronic,optoelectronic,and thermoelectric ***,the realization of high-performance SnSe FETs with low contact resistance(Rc)remains a ***,we systematically investigate the contact of few-layer SnSe FETs through the modulation of native oxide on SnSe by using different *** is found that chromium(Cr)-contacted devices possess the best FET performance,such as electron mobility up to 606 cm^(2)/(V·s)at 78 K,current on/off ratio exceeding 1010,and saturation current of~550μA/μm,where a negligible Schottky barrier(SB)of~30 meV and a low contact resistance of~425Ωμm are achieved.X-ray photoelectron spectroscopy(XPS)and cross-sectional electron dispersive X-ray spectroscopy(EDX)results further reveal that the improved contact arises from the Cr-induced reduction of native oxide(SnOx)to Sn,which thins the tunneling barrier for efficient electron *** findings provide a deep insight into the 2D-metal contact of SnSe and pave the way for its applications in future nanoelectronics.

关键词： few-layer SnSe field-effect transistors(FETs) Cr contact native oxide contact resistance(Rc) Schottky barrier(SB)

Technology of comprehensive disposal and utilization of municipal solid waste (MSW)

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Journal of Environmental Sciences 1999年第3期11卷 378-380页

作者： Liu Xiao\|feng, Liao yin\|zhang, Liu ke\|xin Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu\ 610041, China 中科院成都生物所四川成都 610041 中科院成都生物所四川成都

The project for treating MSW of 200 tons each day was built in Yibin, Sichuan Province of China. The disposal processes are: separation and selection of usable resources; compost and fermentation of “heavy” organic waste (kitchen, garden composting rubbish); incineration of “light” waste (plastic, paper, wood and bamboo etc.) and landfill of inorganic waste. The thermal energy generated in the process can be used as 1/3 of the whole energy for drying fertilizers. In the process, there is no wastewater drainage, and air emissions can be effectively controlled by a series of measures. The sanitary and environmental indicators of disposal site meet the national standards. This project has worked well for two years. It not only disposes of and reduces the MSW, but also retrieves the resource effectively. The organic fertilizer has been applied in the ten thousand acres of fields, with productivity increase by more than 10%.

关键词： municipal solid waste (MSW) comprehensive utilization composted fertilizer.

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黄绿色葡萄石的谱学特征及颜色成因

光谱学与光谱分析 2024年第9期44卷 2538-2544页

作者：李灿陈江军王文杰殷科郑海蓉陆卓刘振东王一铭杨云淇韩文王朝文青岛农业大学艺术学院山东青岛266109 湖北省地质局水文地质工程地质大队湖北荆州434020 中国地质大学(武汉)珠宝学院湖北武汉430074 中国地质大学(武汉)地球科学学院湖北武汉430074 滇西应用技术大学珠宝学院云南腾冲679100 国家珠宝玉石首饰检验集团有限公司北京100013

颜色是宝石重要的光学性质之一,也是影响宝石品质及价格的重要参数。黄绿色葡萄石作为一种常见的玉石品种,其结构、致色离子的种类、价态及配位的复杂性,导致前人关于其致色成因存在较大的争议。采用傅里叶红外吸收光谱(FTIR)、紫外-可... 详细信息

颜色是宝石重要的光学性质之一,也是影响宝石品质及价格的重要参数。黄绿色葡萄石作为一种常见的玉石品种,其结构、致色离子的种类、价态及配位的复杂性,导致前人关于其致色成因存在较大的争议。采用傅里叶红外吸收光谱(FTIR)、紫外-可见光分光光谱(UV-Vis)、激光剥蚀-等离子体质谱(LA-ICPMS)及穆斯堡尔谱(Mössbauer)等现代分析测试手段,对2个典型的黄绿色葡萄石样品(浅黄绿色样品LYG和深黄绿色样品DYG)的主要致色离子种类、价态及配位状态进行了深入研究,为黄绿色葡萄石的致色成因提供科学的解释。UV-Vis分析结果表明,样品LYG和样品DYG均出现明显的~425和~585nm处的吸收带,分别与Fe^(3+)oct的电子跃迁和Fe^(2+)ch-Fe^(3+)oct的电荷转移有关。Mössbauer超精细参数分析结果显示,样品LYG和样品DYG中Fe^(3+)的IS均为0.34mm·s^(-1),QS值分别为0.22和0.35mm·s^(-1),均符合葡萄石八面体配位中Fe^(3+)的特征。样品LYG(IS=1.08mm·s^(-1))和样品DYG(IS=1.07mm·s^(-1))的Fe^(2+)具有相近的IS值,均符合八面体配位中Fe^(2+)的特征。然而,样品DYG中Fe^(2+)的QS值(QS=2.78mm·s^(-1))明显高于样品LYG(QS=1.12mm·s^(-1)),说明前者结构中Fe^(2+)处于畸变的八面体中。样品DYG结构中Fe的含量和Fe^(2+)的比例(4.02wt%;11.88%)均高于样品LYG(3.55wt%;5.27%),表明黄绿色葡萄石的颜色可能与Fe的含量和Fe^(2+)的比例有关。样品LYG和样品DYG中V的含量分别为633和1810μg·g^(-1),指示V可能对黄绿色葡萄石的颜色有贡献,但含量明显低于Fe,所以V对颜色的贡献远低于Fe^(3+)和Fe^(2+)。该研究不仅查明了黄绿色葡萄石的主要致色离子种类(Fe),而且确定了致色离子的价态(Fe^(3+)和Fe^(2+))和配位状态(八面体配位),为黄绿色葡萄石颜色的定量研究提供了有益的基础素材。

关键词：离子种类、价态配位状态致色机理

A Case of Intracranial Solitary Fibrous Tumor

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Chinese Medical Journal 2016年第22期129卷 2767-2768页

作者： ying-Qian Chen Jun-Ji Wei Ren-Zhi Wang Yun-Xiao Meng Wen-Bin Ma Xin-Jie Bao ke-yin Chen Yu Wang Yong-Ning Li Department of Neurosurgery Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical SciencesBeijing 100730 China Department of Pathology Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

To the Editor：Intracranial solitary fibrous tumor （SFT） is a kind of rare *** was first identified as a distinct entity in 1996 and included by the 2000 World Health Organization classification of tumors of the ner... 详细信息

关键词： Intracranial solitary fibrous

Data-Driven Learning and Receding Horizon Control for Quadrotors

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Data-Driven Learning and Receding Horizon Control for Quadro...

Fixed-time Distributed Optimization for Multi-Agent Systems Using an Event-Triggered Communication Scheme

第三十九届中国控制会议

作者： Chen Hu Qiang Lu ke yin School of Automation Hangzhou Dianzi University

This paper presents a control framework for the problem of unknown signal source localization based on quadrotors. There are two levels for the proposed control framework:a decision level and an execution level. In the decision level,the gaussian process regression approach is first used to provide the possible locations of all signal sources. Then, the reference trajectory of quadrotors is planned by the RHC approach. In the execution level, the reference trajectory is fed to the quadrotor controller, where position controllers and attitude controllers are designed with the PID controllers. Finally, through simulation experiments, the effectiveness of the proposed control framework is verified.

关键词： Quadrotor signal sources Gaussian process regression receding horizon control

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Fixed-time Distributed Optimization for Multi-Agent Systems ...

第三十九届中国控制会议

作者： keke Jin Qiang Lu ke yin School of Automation Hangzhou Dianzi University

In this paper, a problem of distributed optimization is investigated for multi-agent systems. The event-triggered communication scheme and fixed-time control method are used. First, for the aim of reducing the consumption of hardware resources and improving the communication efficiency of multi-agent systems, an event-triggered communication scheme is proposed. The scheme only depends on the states of each agent and its neighbors. Second, the convergence of fixed-time distributed optimization algorithm using event-triggered communication scheme is proved by Lyapunov theory. At last, the proposed approach is verified by simulation. The results are given and clearly show the effectiveness of the fixed-time distributed optimization algorithm using the event-triggered communication scheme for multi-agent systems.

关键词： event-triggered communication scheme fixed-time distributed optimization multi-agent systems

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殷克敬经络别通法针刺治疗肩痹经验

中国针灸 2021年第11期41卷 1257-1259页

作者：胡文静杜旭李铦鋆殷克敬陕西中医药大学针灸推拿学院咸阳712046 陕西中医药大学第二附属医院殷克敬工作室咸阳712000

介绍殷克敬教授运用经络别通法针刺治疗肩痹经验。根据疼痛部位将肩痹分为手太阴经型、手阳明经型、手少阳经型、手太阳经型以及混合性。运用经络别通法选穴,手太阴经型多取束骨或飞扬,手阳明经型多取太冲,手少阳经型多取太溪、大钟,手... 详细信息

介绍殷克敬教授运用经络别通法针刺治疗肩痹经验。根据疼痛部位将肩痹分为手太阴经型、手阳明经型、手少阳经型、手太阳经型以及混合性。运用经络别通法选穴,手太阴经型多取束骨或飞扬,手阳明经型多取太冲,手少阳经型多取太溪、大钟,手太阳经型多取太白或地机。结合经络阻滞点、陷谷穴针刺治疗,临床中每获良效。

关键词：肩痹针刺经络别通法经络阻滞点穴陷谷

Self-powered stimuli responsive material for dual stimulation of heat and guest molecules

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Chinese Chemical Letters 2024年第2期35卷 590-593页

作者： Jintao Men ke Xu Taiting Sha Lei He Yan Xu Jie Mu Tijian yin Qiong Ye Jiangsu key Laboratory for Science and Applications of Molecular Ferroelectrics and School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China

Stimuli-responsive smart materials exhibit reverse chemical/physical changes in response to external stimuli and research on stimuli-responsive smart materials with self-powered properties is still uncultivated ***,we report perovskite crystalline self-powered multiple stimuli-responsive materials triggered by chemical and thermal stimuli.[HMEP]PbI_(3)·(H_(2)O)(1;HMEP is a hydroxytris(1-methylethyl)phosphorus cation)crystallizes in a chiral space group P 21 at 293 K and has the piezoelectric reaction(d_(33)=10 pC/N and output voltage=1 V)of self-powered modes,this value is larger than the value of 3 pC/N for the classical piezoelectric material *** materials can generate energy due to mechanical deformation,and using thermal heating to lose water,[HMEP]PbI_(3)(2)can be obtained.2 crystallizes in the non-centrosymmetric space group,undergoes two reversible phase transitions at 243/255 K and 315/348 K,and shows second harmonic generation ***,2 can return to the hydrated form 1 after absorbing *** work will lay the foundation for self-powered stimuli-responsive compounds and contribute to the construction of novel organic-inorganic hybrid materials with second harmonic generation switching.

关键词： Self-powered Dual stimulation reactive Phase transition SHG switch Organic-inorganic hybrid perovskite

肉桂油-艾叶油复配亚微乳制备及协同抗菌研究

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中南药学 2024年第5期22卷 1125-1130页

作者：徐丽芝孟扬王欣茹杨瑞李丹刘爽尹登科王淑君安徽中医药大学合肥230012 江西中医药大学南昌330000 沈阳药科大学沈阳110016 江苏艾迪纳米生物医药有限公司江苏南通226100 南通长三角药物高等研究院江苏南通226133 辽宁中医药大学附属第二医院沈阳110034 国家药品监督管理局食品药品审核查验中心沈阳100044

目的探究肉桂油和艾叶油的单一抗菌活性及两者联合使用的抗菌活性,优化肉桂油-艾叶油复配亚微乳处方及工艺,并对其进行初步质量评价。方法采用微量稀释法测定肉桂油和艾叶油对金黄色葡萄球菌、枯草芽孢杆菌和大肠埃希菌的最小抑菌浓度... 详细信息

目的探究肉桂油和艾叶油的单一抗菌活性及两者联合使用的抗菌活性,优化肉桂油-艾叶油复配亚微乳处方及工艺,并对其进行初步质量评价。方法采用微量稀释法测定肉桂油和艾叶油对金黄色葡萄球菌、枯草芽孢杆菌和大肠埃希菌的最小抑菌浓度(MIC)和最小杀菌浓度(MBC);采用棋盘稀释法测定了两种挥发油复配联用的分级抑菌浓度(FIC);采用滤纸片法测定油不同混合比例下抑菌圈直径,以离心稳定常数、粒径和多分散系数(PDI)为评价指标,最终确定亚微乳的最优处方。结果肉桂油对金黄色葡萄球菌的MIC为0.5 μL·mL^(-1),枯草芽孢杆菌及大肠埃希菌的MIC均为1 μL·mL^(-1),艾叶油对三种供试菌的MIC均为16 μL·mL^(-1)。肉桂油和艾叶油对金黄色葡萄球菌起相加作用,对大肠埃希菌和枯草芽孢杆菌起协同作用。复配亚微乳最优处方为肉桂油-艾叶油-大豆磷脂-泊洛沙姆188(P188)-水 2.5∶3∶0.2∶0.8∶93.5,制得的亚微乳为乳白色液体,平均粒径为(130.7±1.2)nm、PDI为0.145±0.02。结论肉桂油-艾叶油复配亚微乳对金黄色葡萄球、枯草芽孢杆菌和大肠埃希菌均有抑制作用,且效果强于挥发油。

关键词：肉桂油艾叶油亚微乳响应面协同抗菌