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| 1 | Design of Microstructure Parameters on a Small Multi-Throttle Aerostatic Guideway in Photolithography显示文摘A compact multi-throttle aerostatic guideway is the preferred structure for high precision and acceleration motion in the variable-slit system(VS)of photolithography.The presence of microstructure,such as recesses and grooves,on the guideway working surface has been found to improve the loading performance.Nevertheless,the effects on the guideway performance of changing the microstructure on the micron level are not yet clear.The mesh adaptation method,which was proposed by the authors,is employed in this paper to quantitatively study the influences of four microstructure parameters.The effect of tuning these parameters on the loading performance is revealed.The level of impact determines the proposed design process of the parameters.The characteristic feature of the proposed design process is that the working points of carrying capacity,stiffness,and rotational stiffness are unified under twoway adjusting by means of recess parameters.According to the proposed design process and tuning method,the restriction of supply pressure is lifted to a certain extent and the mutual tradeoff among the loading performances is relieved.The experimental results show that the rotational stiffness of the designed guideway,based on the tuned parameters,reached 2.14×10^(4) Nmrad1 and increased by 69.8%.In a scanning test of the applied VS on argon fluoride laser(ArF)photolithography,the average scanning acceleration reached 67.5 m·s^(-2),meeting the design specification. | Zhongpu Wen Jianwei Wu Kunpeng Xing Yin Zhang Jiean Li Jiubin Tan | 2021 | Engineering2021，7，2： | 3 |
| 2 | The Ce doping Cu/ZSM-5 as a new superior catalyst to remove NO from diesel engine exhaust显示文摘 | Lei Pang Chi Fan Lina Shao Kunpeng Song Junxia Yi Xing Cai Jian Wang Ming Kang Tao Li | 2014 | Chemical Engineering Journal2014，，： | 1 |
| 3 | Evaluation of measurement uncertainty of the high-speed variable-slit system based on the Monte Carlo method显示文摘This paper presents a dynamic and static error transfer model and uncertainty evaluation method for a high-speed variable-slit system based on a two- dimensional orthogonal double-layer air-floating guide rail structure. The motion accuracy of the scanning blade is affected by both the moving component it is attached to and the moving component of the following blade during high-speed motion. First, an error transfer model of the high-speed variable-slit system is established, and the influence coefficients are calculated for each source of error associated with the accuracy of the blade motion. Then, the maximum range of each error source is determined by simulation and experiment. Finally, the uncertainty of the blade displacement measurement is evaluated using the Monte Carlo method. The proposed model can evaluate the performance of the complex mechanical system and be used to guide the design. | Yin ZHANG Jianwei WU Kunpeng XING Zhongpu WEN Jiubin TAN | 2020 | Frontiers of Mechanical Engineering2020，15，4： | 0 |
| 4 | Ground-Based Hyperspectral Stereoscopic Remote Sensing Network: A Promising Strategy to Learn Coordinated Control of O_(3) and PM_(2.5) over China显示文摘With the coming of the“14th Five-Year Plan,”the coordinated control of particulate matter with an aerodynamic diameter no greater than 2.5 lm(PM_(2.5))and O_(3) has become a major issue of air pollution prevention and control in China.The stereoscopic monitoring of regional PM_(2.5) and O_(3) and their precursors is crucial to achieve coordinated control.However,current monitoring networks are currently inadequate for monitoring the vertical profiles of both PM_(2.5) and O_(3) simultaneously and support air quality control.The University of Science and Technology of China(USTC)has established a nationwide ground-based hyperspectral stereoscopic remote sensing network based on multi-axis differential optical absorption spectroscopy(MAX-DOAS)since 2015.This monitoring network provides a significant opportunity for the regional coordinated control of PM_(2.5) and O_(3) in China.One-year vertical profiles of aerosol,NO_(2) and HCHO monitored from four MAX-DOAS stations installed in four megacities(Beijing,Shanghai,Shenzhen,and Chongqing)were used to characterize their vertical distribution differences in four key regions,Jing–Jin–Ji(JJJ),Yangtze River Delta(YRD),Pearl River Delta(PRD),and Sichuan Basin(SB),respectively.The normalized and yearly averaged aerosol vertical profiles below 400 m in JJJ and PRD exhibit a box shape and a Gaussian shape,respectively,and both show exponential shapes in YRD and SB.The NO_(2) vertical profiles in four regions all exhibit exponential shapes because of vehicle emissions.The shape of the HCHO vertical profile in JJJ and PRD was Gaussian,whereas an exponential shape was shown in YRD and SB.Moreover,a regional transport event occurred at an altitude of 600–1000 m was monitored in the southwest–northeast pathway of the North China Plain(NCP)by five MAX-DOAS stations(Shijiazhuang(SJZ),Wangdu(WD),Nancheng(NC),Chinese Academy of Meteorological Sciences(CAMS),and University of Chinese Academy of Sciences(UCAS))belonging to the above network.The aerosol optical depths(AOD)in these five stations decreased in the order of SJZ>WD>NC>CAMS>UCAS.The short-distance regional transport of NO2 in the 700–900 m layer was monitored between WD and NC.As an important precursor of secondary aerosol,the peak of NO_(2) air mass in WD and NC all occurred 1 h earlier than that of aerosol.This was also observed for the short-distance regional transport of HCHO in the 700–900 m layer between NC and CAMS,which potentially affected the O_(3) concentration in Beijing.Finally,CAMS was selected as a typical site to determine the O_(3)–NO_(x)–volatile organic compounds(VOCs)sensitivities in vertical space.We found the production of O_(3) changed from predominantly VOCs-limited conditions to mainly mixed VOCs–NO_(x)-limited condition from the 0–100 m layer to the 200–300 m layer.In addition,the downward transport of O_(3) could contribute to the increase of ground surface O_(3) concentration.This ground-based hyperspectral stereoscopic remote sensing network provide a promising strategy to support management of PM_(2.5) and O_(3) and their precursors and conduct attribution of sources. | Cheng Liu Chengzhi Xing Qihou Hu Qihua Li Haoran Liu Qianqian Hong Wei Tan Xiangguang Ji Hua Lin Chuan Lu Jinan Lin Hanyang Liu Shaocong Wei Jian Chen Kunpeng Yang Shuntian Wang Ting Liu Yujia Chen | 2022 | Engineering2022，，12： | 0 |
| 5 | Talent Policy,R&D Personnel Recruitment and Corporate Innovation显示文摘This paper analyzes the impact of talent policy on the R&D personnel recruitment and corporate innovation.The research is based on more than 5.8 million online recruitments from listed companies from 2017 to 2018.The study makes five principal findings.Firstly,companies affected by talent policy have significantly increased the number of R&D personnel recruited.Secondly,at the policy level,the incentive effect varies according to different levels of talent policy subsidies and threshold requirements,with more significant effects observed where subsidies are higher and threshold requirements are lower.Thirdly,at the enterprise level,the incentive effect is more significant for high-tech enterprises,better-governance companies,and non-state-owned enterprises.Fourthly,at the city level,the incentive effect is more significant in cities with better economic development,higher administrative levels,and better scientific research support environments.Finally,after the introduction of talent policy,there have been significant improvements in enterprises'R&D investment,patent output and R&D efficiency.In terms of R&D personnel recruitment,this paper provides micro-level evidence for the influence effect,and identifies specific mechanisms and boundary conditions of talent policy on corporate innovation.It expands the research on the influence effect of government and institutional factors on corporate innovation.In addition,it provides reference for accelerating the building up of a talent-strong country,deepening the implementation of innovation-driven development strategy and realizing economic transformation and upgrading. | SUN Kunpeng LUO Ting XIAO Xing | 2023 | Frontiers of Business Research in China2023，17，2： | 0 |
| 6 | Boosted high-temperature electrical characteristics of AlGaN/GaN HEMTs with rationally designed compositionally graded AlGaN back barriers显示文摘Wide bandgap GaN-based HEMTs have shown great potential as key components in various power electronic systems but still face challenges in the pursuit of devices with stable operation capability especially in harsh environments.Here,we report a high-performance double heterojunction(DH)based AlGaN/GaN HEMT by incorporating a decreasing-Al-composition(DAC)graded AlGaN back barrier(BB)beneath the GaN channel.Thanks to the improved electron confinement enabled by graded BB,the DHHEMT exhibits significantly improved on-state drain current density and off-state breakdown voltage compared with a single heterojunction(SH)based HEMT.More intriguingly,with an additional Si Nx passivation layer,the surface states of the DH-HEMTs can be effectively suppressed,leading to an almost constant offstate leakage current and negligible gate contact degradation across the temperature range from 25℃to 150℃.These results highlight the superiority and reliability of the proposed graded AlGaN BB to boost device characteristics for applications under high temperatures and harsh conditions. | Haochen ZHANG Yue SUN Kunpeng HU Lei YANG Kun LIANG Zhanyong XING Hu WANG Mingshuo ZHANG Huabin YU Shi FANG Yang KANG Haiding SUN | 2023 | Science China(Information Sciences)2023，66，8： | 0 |
| 7 | Expert consensus on emergency medicine procedure optimization guided by routine prevention and control strategy for COVID-19显示文摘The outbreak of coronavirus disease 2019(COVID-19)was declared a global public health emergency on 31 January 2020.Emergency medicine procedures in Emergency Department should be optimized to cope with the current COVID-19 pandemic by providing subspecialty services,reducing the spread of nosocomial infections,and promoting its capabilities to handle emerging diseases.Thus,the Chinese Society of Emergency Medicine and Wuhan Society of Emergency Medicine drafted this consensus together to address concerns of medical staffs who work in Emergency Department.Based on in-depth review of COVID-19 diagnosis and treatment plans,literatures,as well as management approval,this consensus proposes recommendations for improving the rationalization and efficiency of emergency processes,reducing the risk of nosocomial infections,preventing hospital viral transmission,and ensuring patient safety. | Weiyong Sheng Biao Chen Shanjie Fan Zhuanglin Zeng Ying Zhou Kunpeng Huang Xing Cheng Chunyan Cao Banghong Da Ning Zhou Qidi Zhou Qinghua Wang Jun Guo Peng Sun Chuanzhu Lv Xiaoling Fu Jinxiang Zhang | 2021 | Asian Pacific Journal of Tropical Medicine2021，14，4： | 0 |
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