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Effective N-methyl-2-pyrrolidone wet cleaning for fabricating highperformance monolayer MoS2 transistors

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Nano Research 2019年第2期12卷 303-308页

作者： Po-Chun Chen chih-Pin Lin Chuan-Jie Hong chih-hao Yang Yun-Yan Lin Ming-Yang Li Lain-Jong Li Tung-Yuan Yu Chun-Jung Su Kai-Shin Li Yuan-Liang Zhong Tuo-Hung Hou Yann-Wen Lan Department of Physics "National Taiwan Normal University" Taipei 11677 Taiwan China Department of Electronics Engineering and Institute of Electronics "National Chiao Tung University' Hsinchu 30010 Taiwan China Department of Physics and Center for Nanotechnology Chung Yuan Christian University Chungli 32023 Taiwan China Research Center for Applied Sciences Academia Siriica: Taipei 11529 Taiwan China Physical Sci. and Eng. King Abdullah University of Sci.and Technology Thuwal 23955 Kingdom of Saudi Arabia "National Nano Device Laboratories:"National Applied Research Laboratories" Hsinchu 30078 Taiwan China

Two-dimensional semiconductors,such as MoS2 are known to be highly susceptible to diverse molecular adsorbates on the surface during fabrication,which could adversely affect device *** ensure high device yield,uniformity and performance,the semiconductor industry has long employed wet chemical cleaning strategies to remove undesirable surface contaminations,adsorbates,and native oxides from the surface of Si wafers.A similarly effective surface cleaning technique for two-dimensional materials has not yet been fully *** this study,we propose a wet chemical cleaning strategy for MoS2 by using *** cleaning process not only preserves the intrinsic properties of monolayer MoS2,but also significantly improves the performance of monolayer MoS2 *** device on current of 12 μA·μm-1 for a channel length of 400 nm,contact resistance of 15 kΩ·μm,field-effect mobility of 15.5 cm^2·V^-1·s^-1,and the average on-off current ratio of 10^8 were successfully demonstrated.

关键词： monolayer M0S2 devices standard wet cleaning field-effect transistors N-methyl-2-pyrrolidone

Experimental research and analysis of three-finger micro-tweezers

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光学精密工程 2005年第5期13卷 570-574页

作者： HUANG Wen-hao XING hao Department of Precision Machinery and Precision Instrument University of Science and Technology of China HeFei 230027 China

A new type of three-finger micro-tweezer driven by electro-static force was developed for stable manipulation and assembly of micro devices. The whole system consists of micro-tweezers and a specially designed high frequency AC power supply. The free end of the fingers closes and opens with the increase and decrease of the voltage. The tweezers can grasp and manipulate micro objects at size from 30～100 μm. A quantitative simulation method based on boundarx element method(BEM) and equation of energy conservation is introduced to analyze the non-linear behaviors of the tweezer closure. The simulation results agree well with the experimental data.

关键词：镊子 MEMS 微电子机械系统数值模拟

Characteristics of strong winds at the Runyang Suspension Bridge based on field tests from 2005 to 2008

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第7期11卷 465-476页

作者： hao WANG MOE Key Laboratory of Concrete and Prestressed Concrete Structure Nanjing 210096 China College of Civil Engineering Southeast University Nanjing 210096 China

Field measurement of strong wind characteristics is of great significance for the development of bridge wind engineering. Located in east China, the Runyang Suspension Bridge (RSB) with a main span of 1490 m is the longest bridge in China and the third longest in the world. During the last four years, the RSB has suffered from typhoons and strong northern winds on more than ten occasions. To determine the strong wind characteristics of the RSB, wind measurement data obtained from field tests during strong winds and data from the wind environment monitoring subsystem of the structural health monitoring system (SHMS) of the RSB were combined to analyze the wind speed and direction, variation in wind speed with height, turbulence intensity, turbulence integral length, wind friction speed and the power spectrum. Comparative studies on the characteristics of these different strong winds were carried out based on the current wind-resistant design specification for highway bridges. Results showed that some regularity in wind characteristics can be found in these different typhoons passing through the RSB. The difference between a strong northern wind and a typhoon is relatively clear, and in summer the typhoon is the dominant wind load acting on the RSB. In addition, there were some differences between the measured strong wind characteristics and the values suggested by the specification, especially in respect to turbulence intensity and turbulence integral length. Results provide measurement data for establishing a strong wind characteristic database for the RSB and for determining the strong wind characteristic parameter values of this coastal area in east China.

关键词： Suspension bridge Strong wind Wind characteristic Field test Structural health monitoring system (SHMS)

Pulsar braking:magnetodipole ***

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Science China(Physics,Mechanics & Astronomy) 2016年第1期59卷 33-44页

作者： hao Tong Xinjiang Astronomical Observatory Chinese Academy of Sciences

Pulsars are good clocks in the universe. One fundamental question is that why they are good clocks? This is related to the braking mechanism of pulsars. Nowadays pulsar timing is done with unprecedented accuracy. More pulsars have braking indices *** period derivative of intermittent pulsars and magnetars can vary by a factor of several. However, during pulsar studies, the magnetic dipole braking in vacuum is still often assumed. It is shown that the fundamental assumption of magnetic dipole braking(vacuum condition) does not exist and it is not consistent with the observations. The physical torque must consider the presence of the pulsar magnetosphere. Among various efforts, the wind braking model can explain many observations of pulsars and magnetars in a unified way. It is also consistent with the up-to-date observations. It is time for a paradigm shift in pulsar studies: from magnetic dipole braking to wind braking. As one alternative to the magnetospheric model, the fallback disk model is also discussed.

关键词： magnetar magnetic field neutron star pulsar wind

新高考背景下深化高中教育教学改革应重视的几个问题

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教学与管理 2025年第1期 12-14页

作者：司晓宏马永昊陕西师范大学教育学部西安710062 陕西省社会科学院西安710061

自2014年新高考改革启动以来,已在全国29个省市逐步推进。调研发现,新高考在实际推进中给普通高中传统的教育、教学和管理带来了诸多压力与挑战,这突出表现为:“选课走班制”在实际推行中存在许多堵点;“学生综合素质评价”面临着评价... 详细信息

自2014年新高考改革启动以来,已在全国29个省市逐步推进。调研发现,新高考在实际推进中给普通高中传统的教育、教学和管理带来了诸多压力与挑战,这突出表现为:“选课走班制”在实际推行中存在许多堵点;“学生综合素质评价”面临着评价标准不一、结果应用受限等困境;“学生生涯规划教育”存在着专业性不强、效果不佳等问题;学生多样化自由选课凸显教师队伍结构性缺编等。针对上述问题,应加强普通高中选课走班制的资源条件支持,健全学生综合素质评价的体制机制,提高学生生涯规划教育的专业性和精准度,积极破解改革所导致的教师结构性缺编问题,以推动和确保新高考改革各项政策有效落地实施。

关键词：新高考改革选课走班制学生综合素质评价生涯规划教育教育教学改革

Structured Learning in Biological Domain

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Journal of Systems Science and Systems Engineering 2020年第4期29卷 440-453页

作者： Canh hao Nguyen Bioinformatics Center Instute for Chemical ResearchKyoto UniversityUjiKyotoJapan

Biological domain has been blessed with more and more data from biotechnologies as well as data integration *** the renaissance of machine learning and artificial intelligence,there is so much promise of data-driven biological knowledge ***,it is not straight forward due to the complexity of the domain knowledge hidden in the *** any level,be it atoms,molecules,cells or organisms,there are rich interdependencies among biological *** learning approaches in this domain usually involves analyzing interdependency structures encoded in graphs and related *** this report,we review our work in developing new Machine Learning methods for these applications with improved performances in comparison with state-of-the-art *** show how the networks among biological components can be used to predict properties.

关键词： Structured learning sparse modeling systems biology deep learning

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宋夏沿边蕃部与北宋前中期“禁盐制夏”实施

河北大学学报（哲学社会科学版） 2025年第1期50卷 53-62页

作者：郝振宇西北师范大学历史文化学院甘肃兰州730070

宋夏沿边蕃部是北宋实施“禁盐制夏”的重要关注对象。太宗时期,北宋未认识到蕃部为己所用的军事价值,故禁盐针对的是蕃部整体。真宗、仁宗时期,北宋重视熟户蕃部防御西夏的作用,“禁盐制夏”转而针对生户蕃部。北宋禁盐对象改易与宋夏... 详细信息

宋夏沿边蕃部是北宋实施“禁盐制夏”的重要关注对象。太宗时期,北宋未认识到蕃部为己所用的军事价值,故禁盐针对的是蕃部整体。真宗、仁宗时期,北宋重视熟户蕃部防御西夏的作用,“禁盐制夏”转而针对生户蕃部。北宋禁盐对象改易与宋夏军事局势变化有关,体现了北宋实施策略的灵活性。

关键词： “禁盐制夏” 联蕃制夏生户熟户

Constructing Pr-doped CoOOH catalytic sites for efficient electrooxidation of 5-hydroxymethylfurfural

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Journal of Energy Chemistry 2025年第1期 234-244页

作者： Botao Fan hao Zhang Bang Gu Feng Qiu Qiue Cao Wenhao Fang School of Chemical Science and Technology Yunnan University National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University

Electrocatalytic conversion of renewable biomass is emerging as a promising route for sustainable chemical production;hence it urgently calls for developing efficient electrocatalysts with low potentials and high current ***,a Pr-doped Co（OH）2hexagonal sheet （Pr/Co=1/9,in mole） is synthesized by electrodeposition as highly performant catalyst for 5-hydroxymethylfurfural （HMF） oxidation reaction（HMFOR） to produce 2,5-furandicarboxylic acid （FDCA）.This novel and low-cost catalyst possesses a rather low onset potential of 1.05 V （***） and requires only 1.10 V （***） to reach a current density of 10 mA cm-2for HMFOR,significantly outperforming Co（OH）2benchmark (i.e.,210 mV higher to reach10 m A cm-2).The origin of Pr promotion effect as well as the evolution of CoOOH catalytic sites and HMFOR process has been deeply elucidated by physical characterizations,kinetic experiments,in situ electrochemical techniques,and theoretical *** unique Pr-ameliorated CoOOH active centers enable 100%conversion of HMF,99.6%selectivity of FDCA,and 99.7%Faraday efficiency,with a superior cycling durability toward *** can be one of the most outstanding results for Co-based HMFOR catalysts to date in the *** this work can help open up new horizons for constructing novel and efficient Co-based electrocatalysts by the utilization of lanthanide elements.

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Mode-localized accelerometer with ultrahigh sensitivity

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Science China(Information Sciences) 2022年第4期65卷 238-250页

作者： hao KANG Bing RUAN Yongcun hao Honglong CHANG Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University

The mode localization phenomenon is an effective technique to enhance sensor sensitivity,and some low noise floor mode-localized sensors,including accelerometers,mass sensors,and electrometers,have been successfully *** further improve the performance of the mode-localized accelerometer,we report a microelectromechanical system mode-localized accelerometer based on 4-degree of freedom （DoF） weakly coupled resonators （WCRs） with a stress-relief structure eliminating the thermal stress generated during the silicon-on-glass fabrication *** results show that compared with the state-of-the-art 3-DoF mode-localized accelerometer (4.40 g-1),the amplitude ratio-based sensitivity of the proposed accelerometer(119.36 V·g-1) is improved by 2612%.Moreover,the noise floor is 0.64μg·Hz-1/2from 0.01 to 3 Hz under the closed-loop *** the authors’best knowledge,this is the lowest measured noise floor for mode-localized accelerometers.

关键词： mode localization weakly coupled resonators accelerometer degree-of-freedom microelectromechanical system