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Device performance limit of monolayer SnSe_(2) MOSFET

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Nano Research 2022年第3期15卷 2522-2530页

作者： Hong Li Jiakun Liang Qida Wang Fengbin Liu Gang Zhou Tao Qing shaohua zhang Jing Lu College of Mechanical and Material Engineering North China University of TechnologyBeijing 100144China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100094China State Key Laboratory of Mesoscopic Physics and Department of Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226000China

Two-dimensional(2D)semiconductors are attractive channels to shrink the scale of field-effect transistors(FETs),and among which the anisotropic one is more advantageous for a higher on-state current(I_(on)).Monolayer(ML)SnSe_(2),as an abundant,economic,nontoxic,and stable two-dimensional material,possesses an anisotropic electronic ***,we study the device performances of the ML SnSe_(2) metal-oxide-semiconductor FETs(MOSFETs)and deduce their performance limit to an ultrashort gate length(L_(g))and ultralow supply voltage(V_(dd))by using the ab initio quantum transport *** ultrahigh I_(on) of 5,660 and 3,145µA/µm is acquired for the n-type 10-nm-L_(g) ML SnSe_(2) MOSFET at V_(dd)=0.7 V for high-performance(HP)and low-power(LP)applications,***,until L_(g) scales down to 2 and 3 nm,the MOSFETs(at V_(dd)=0.65 V)surpass I_(on),intrinsic delay time(τ),and power-delay product(PDP)of the International Roadmap for Device and Systems(IRDS,2020 version)for HP and LP devices for the year ***,the 5-nm-L_(g) ML SnSe_(2) MOSFET(at V_(dd)=0.4 V)fulfills the IRDS HP device and the 7-nm-L_(g) MOSFET(at V_(dd)=0.55 V)fulfills the IRDS LP device for the year 2034.

关键词： monolayer(ML)SnSe_(2) anisotropic metal-oxide-semiconductor field-effect transistor(MOSFET) device performance limit ab initio transport simulation

Fast charge transport motivated by tunable Mo2C/Mo2N high-quality heterointerface for superior pseudocapacitive storage

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能源化学:英文版 2023年第8期83卷 465-477,I0012页

作者： Yanjun Gao shaohua zhang Lingrui Xu Xiangyang Li Lijie Li Lixia Bao Jiong Peng Xin Li School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China Analysis&Testing Center Beijing Institute of TechnologyBeijing 100081China

The development of potential transition-metal carbide/nitride heterojunctions is hindered by overall understanding and precise modulation for heterointerface ***,we demonstrate that Mo_(2)C/Mo_(2)N heterojunction with the precisely regulated high-quality interface can achieve marvelous rate performance and energy output via enlarging the interface-effect range and maximizing "accelerated charge" amount The heterointerface mechanism improving properties is synergistically revealed from kinetics and thermodynamics *** analysis confirms that the self-built electric field affords a robust force to drive rapid interface electrons/ions *** small adsorption energy,high density of states and quite low diffusion barrier thermodynamically enhance the electrochemical reaction dynamics on ***,the almost optimal performance of ultrahigh capacitance retention(85.6% even at 10 A g^(-1)) and pronounced energy output(96.4 Wh kg^(-1))in hybridsupercapacitors than other Mo_(2)C/Mo_(2)N-based materials is *** work gives new insight into the energy storage mechanism of heterojunction and guides the design of advanced electrodes.

关键词： Energy storage Hybrid supercapacitors Pseudocapacitance Heterojunction High-quality interface

On the source of the quasi-Carrington Rotation periodic magnetic variations on the Martian surface: InSight observations and modeling

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Earth and Planetary Physics 2022年第3期6卷 275-283页

作者： Hao Luo AiMin Du shaohua zhang YaSong Ge Ying zhang ShuQuan Sun Lin Zhao Lin Tian SongYan Li Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth Science University of Chinese Academy of SciencesBeijing 100049China Beijing Institute of Spacecraft Environment Engineering Beijing 100094China

In a recent paper(Luo H et al.,2022),we found that the peak amplitudes of diurnal magnetic variations,measured during martian days(sols)at the InSight landing site,exhibited quasi Carrington-Rotation(qCR)periods at higher eigenmodes of the natural orthogonal components(NOC);these results were based on~664 sols of magnetic field ***,the source of these periodic variations is still *** this paper we introduce the neutral-wind driven ionospheric dynamo current model(e.g.,Lillis et al.,2019)to investigate the *** candidates-the draped IMF,electron density/plasma density,the neutral densities,and the electron temperature in the ionosphere with artificial qCR periodicity,are applied in the modeling to find the main factor likely to be causing the observed surface magnetic field variations that exhibit the same qCR *** show that the electron density/plasma density,which controls the total conductivity in the dynamo region,appears to account for the greatest part of the surface qCR variations;its contribution reaches about 67.6%.The draped IMF,the neutral densities,and the electron temperature account,respectively,for only about 12.9%,10.3%,and 9.2%of the *** study implies that the qCR magnetic variations on the Martian surface are due primarily to variations of the dynamo currents caused by the electron density *** suggest also that the timevarying fields with the qCR period could be used to probe the Martian interior's electrical conductivity structure to a depth of at least 700 km.

关键词： InSight sol magnetic variations Carrington Rotation(CR)periodicity

预制混凝土管组合柱-钢梁节点抗震性能有限元分析

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特种结构 2024年第1期41卷 30-35+69页

作者：郭广海普玉塔章少华张锡治邸尧中国石油天然气股份有限公司西藏销售分公司天津大学建筑设计规划研究总院有限公司天津大学建筑工程学院

针对采用不同加强形式的预制混凝土管组合柱-钢梁节点,通过建立精细化有限元模型,对节点的抗震性能进行了分析,研究了不同加强形式对节点抗震性能和承载力的影响。通过有限元参数化分析,研究了轴压比、钢梁翼缘加强宽度和加强长度对节... 详细信息

针对采用不同加强形式的预制混凝土管组合柱-钢梁节点,通过建立精细化有限元模型,对节点的抗震性能进行了分析,研究了不同加强形式对节点抗震性能和承载力的影响。通过有限元参数化分析,研究了轴压比、钢梁翼缘加强宽度和加强长度对节点承载力的影响。分析结果表明:随着轴压比的增加,节点峰值荷载增幅在4%以内,轴压比对节点承载力影响较小;节点采取钢梁翼缘加强宽度后,峰值承载力提高约20%,节点钢梁翼缘加强宽度大于75mm后,增加加强宽度对节点峰值承载力的影响较小;钢梁翼缘加强长度对节点峰值承载力提升的效果有限,建议加强长度取翼缘宽度的1.7倍左右。

关键词：装配式混合结构梁柱节点抗震性能有限元分析

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达尔西利在乳腺癌治疗中的研究进展

临床肿瘤学杂志 2024年第1期29卷 90-95页

作者：秦莉莉张少华宋华董晓培李凡解放军总医院第五医学中心肿瘤内科北京100071

乳腺癌是目前世界上发病率最高的恶性肿瘤。美国国家癌症研究所监测、流行病学和最终结果数据库(SEER)显示,激素受体阳性(HR+)乳腺癌占比超过70%,而内分泌治疗是HR+晚期乳腺癌的主要治疗手段之一。多项研究证实,在内分泌治疗的基础上联... 详细信息

乳腺癌是目前世界上发病率最高的恶性肿瘤。美国国家癌症研究所监测、流行病学和最终结果数据库(SEER)显示,激素受体阳性(HR+)乳腺癌占比超过70%,而内分泌治疗是HR+晚期乳腺癌的主要治疗手段之一。多项研究证实,在内分泌治疗的基础上联合CDK4/6抑制剂可以显著改善HR+晚期乳腺癌患者的预后。目前临床应用的CDK4/6抑制剂主要有哌柏西利、阿贝西利和瑞博西利。达尔西利是中国自主研发的第1款CDK4/6抑制剂,为1.1类创新药,是全球第4种CDK4/6抑制剂,在不同分期乳腺癌中均显示出一定疗效。现就达尔西利在不同类型乳腺癌中的相关研究作一综述,以期为达尔西利在未来乳腺癌治疗中的应用提供参考。

关键词：乳腺癌达尔西利 CDK4/6抑制剂疗效

DIP改革背景下负向医疗行为成因及治理策略分析

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医学与哲学 2024年第14期45卷 28-31页

作者：侯慧玉张少华田溢卿王建斌李景涛王亚珍河北省人民医院公费医保办公室河北石家庄050051 河北省第八人民医院医务处河北石家庄050011

从医保管理部门、医疗机构和参保患者三个维度对医保支付方式改革背景下负向医疗行为的成因进行分析,发现以下问题:医保管理部门的法律制度不健全、部门联动缺失、双向沟通机制不完善,医疗机构的管理精细化程度不够、绩效考核体系落后... 详细信息

从医保管理部门、医疗机构和参保患者三个维度对医保支付方式改革背景下负向医疗行为的成因进行分析,发现以下问题:医保管理部门的法律制度不健全、部门联动缺失、双向沟通机制不完善,医疗机构的管理精细化程度不够、绩效考核体系落后、双向转诊落实不理想,部分参保患者存在负向就医行为。因此,避免负向医疗行为发生的治理策略包括:医保管理部门应健全法律制度体系、建立部门联动机制、拓展双向沟通渠道,医疗机构应推进管理精细化程度、调整绩效考核体系、建立分级诊疗秩序,参保患者应提高道德感使命感,共同维护医保基金安全。

关键词：医疗保险按病种分值付费医疗费用控制负向医疗行为

新疆巴音郭楞蒙古自治州特色林果业发展现状及对策

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果树资源学报 2024年第5期5卷 118-122页

作者：肖永丽张少华库完汗·吾甫尔江振斌新疆巴音郭楞蒙古自治州苗圃新疆巴音郭楞841000 新疆巴音郭楞蒙古自治州林果技术研究推广中心新疆巴音郭楞841000

新疆巴州地区光照资源充足、昼夜温差大,在促进果树生长、对果实糖度积累和果实口感的提高有极大优势,是我国库尔勒香梨、轮台白杏、若羌红枣等优质林果的重要产区。库尔勒香梨、轮台白杏、若羌红枣等林果产品是该地区种植结构中重点发... 详细信息

新疆巴州地区光照资源充足、昼夜温差大,在促进果树生长、对果实糖度积累和果实口感的提高有极大优势,是我国库尔勒香梨、轮台白杏、若羌红枣等优质林果的重要产区。库尔勒香梨、轮台白杏、若羌红枣等林果产品是该地区种植结构中重点发展产业,但该地区干旱少雨,蒸发量大,水资源匮乏,土壤有机质含量较低,因此,如何在水资源有限的情况下进行科学种植,提高特色林果的产量和品质是当地亟需解决的突出问题。从产业发展基础、科技支撑力度和农业产业化水平等3个方面分析了巴州特色林果业发展中存在的问题,在此基础上,明确了发展现代化巴州特色林果的必然性和优势,提出了调整产业结构、优化特色林果业、推进大田节水种植技术、应用微生物菌剂及代谢产物和生草法管理等对策建议。将各种措施结合起来,通过集约化经营,优化产业结构,改进特色林果的管理方式,提高林果的产量和品质,为实现巴州特色林果提质增效提供科学参考。

关键词：新疆巴州特色林果业发展现状对策

Provenance Variability of the Triassic Strata in the TurpanHami Basin: Detrital Zircon Record of Indosinian Tectonic Reactivation in the Eastern Tianshan

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Acta Geologica Sinica(English Edition) 2019年第6期93卷 1850-1868页

作者： zhang shaohua LIU Chiyang BAI Jianke WANG Jianqiang MA Ming GUAN Yuzhao PENG Heng Shaanxi Key Laboratory of Petroleum Accumulation Geology Xi’an Shiyou UniversityXi’an 710065China School of Earth Sciences and Engineering Xi’an Shiyou UniversityXi’an 710065China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Research Center of Orogenic Geology Xi’an Center of Geological SurveyChina Geological SurveyXi’an 710054China

The Triassic strata in the Turpan-Hami Basin potentially chronicled the missing sedimentary record of Indosinian tectonic evolution in the Eastern *** this study,we conducted detrital zircon U-Pb geochronological analyses on subsurface Triassic samples collected from the Turpan-Hami Basin to unravel sedimentary response of Indosinian tectonic reactivation and its *** detrital zircon age spectra of the Triassic samples are quite different,reflecting significant provenance *** zircon grains in the Lower Triassic sample were mainly from the Central Tianshan,while the Jueluotag acted as a minor *** contrast,the Late Paleozoic rocks in Jueluotag act as the main provenance for the Middle-Upper Triassic samples,while the Central Tianshan acted as a minor ***,zircon grains in the Middle Triassic sample were mainly from the Permian rocks in Jueluotag,while Indosinian strike-slipdriven rapid exhumation brought deeper Carboniferous rocks of Jueluotag as an important age population for the Upper Triassic *** inter-sample variability of age spectra of the Triassic samples provides sedimentary evidence for Indosinian tectonic reactivation in the Eastern Tianshan and its periphery,which could be attributed to differential exhumation of different sources driven by coeval strike-slip tectonics along deep *** Indosinian tectonic behavior in the Eastern Tianshan,which is characterized by partial melting of the pre-thickened crust and strike-slip deformation,acted as a far-field respond to the coeval continental accretion occurring along the southern Eurasian ***,our new detrital zircon data,together with previously published data in the Turpan-Hami Basin,demonstrate that there are significant changes in source-to-sink system from the Permian to the Triassic,suggesting that the Permian-Triassic unconformity in the Eastern Tianshan and its periphery was generated by Late Permian-Early Triassic tec

关键词： detrital zircon geochronology provenance Indosinian tectonic reactivation Turpan-Hami Basin Tianshan

Integrated Active Suspension and Anti-Lock Braking Control for Four-Wheel-Independent-Drive Electric Vehicles

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 87-98页

作者： Ze Zhao Lei zhang Xiaoling Ding Zhiqiang zhang shaohua Li Liang Gu National Engineering Research Center for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China

This paper presents an integrated control scheme for enhancing the ride comfort and handling performance of a four-wheel-independent-drive electric vehicle through the coordination of active suspension system(ASS)and anti-lock braking system(ABS).First,a longitudinal-vertical coupled vehicle dynamics model is established by integrating a road input *** the coupling mechanisms between longitudinal and vertical vehicle dynamics are *** ASS-ABS integrated control system is proposed,utilizing an H∞controller for ASS to optimize load transfer effect and a neural network sliding mode control for ABS ***,the effectiveness of the proposed control scheme is evaluated through comprehensive tests conducted on a hardware-in-loop(HIL)test *** HIL test results demonstrate that the proposed control scheme can significantly improve the braking performance and ride comfort compared to conventional ABS control methods.

关键词： Four-wheel-independent-drive electric vehicles Active suspension system(ASS) Anti-lock braking system(ABS) Vertical-longitudinal vehicle dynamics