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终端区进场程序运行效能量化评估方法

航空计算技术 2024年第3期54卷 76-80页

作者：李元直夏正洪方鹏越朱晓波高云峰中国民用航空飞行学院四川广汉618000

针对终端区不同进场程序的运行效能缺乏全面的量化评估问题,开展对终端区进场程序运行效能量化评估工作。定义了终端区进场程序运行效能的概念,从运行效率、安全性、管制工作负荷和环境效益四个维度构建效能评估指标体系,并进一步细化... 详细信息

针对终端区不同进场程序的运行效能缺乏全面的量化评估问题,开展对终端区进场程序运行效能量化评估工作。定义了终端区进场程序运行效能的概念,从运行效率、安全性、管制工作负荷和环境效益四个维度构建效能评估指标体系,并进一步细化了指标的量化评估方法。选用层次分析法和熵权法获取评估指标的主客观权重,再通过线性加权求和的方法求得效能值。最后,以上海终端区点融合进场程序(PMS)和标准仪表进场程序(STAR)为基础,采用雷达管制模拟仿真系统设计航班数据并验证对比了正常流量和极限流量情况下PMS和STAR的运行效能。结果表明:在不同流量情况下,采用PMS后终端区运行效能分别提升了32%和55%,从而验证了所提效能评估指标体系和方法是合理的。

关键词：航空运输点融合程序标准仪表进场程序效能评估雷达管制模拟仿真系统

The Normal-and Antinormal-Ordered Decomposition Formulas of Multimode Exponential Operators

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Communications in Theoretical Physics 2001年第4期35卷 465-468页

作者： gao yun-feng feng Jian SONG Tong-Qiang Department of Physics Ningbo University Department of Communication Engineering Liaocheng Teacher"s College Department of Education Engineering Liaocheng Teacher"s College

We obtain the normally ordered form of the general multimode exponential operator by means of parameter differentiation method and its antinormally ordered form by virtue of the technique of integration within an orde... 详细信息

关键词：量子力学多模指数算符正则有序分解

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固定烧结温度下制备陶粒时煤矸石掺入量研究

佛山陶瓷 2024年第3期34卷 51-53页

作者：郝惠兰高云峰朱保顺吉国荣田玉明王凡山西科技学院材料科学与工程学院晋城048000

为了对固定烧结温度下制备陶粒支撑剂时煤矸石的掺入量展开研究。本文以山西阳泉铝矾土为主要原料,工业废弃物煤矸石为添加剂,按照铝矾土煤矸石的质量比为7:3、6:4、5:5、4:6的比例分别混料,根据前期研究结果,选取1300℃的烧结温度烧结... 详细信息

为了对固定烧结温度下制备陶粒支撑剂时煤矸石的掺入量展开研究。本文以山西阳泉铝矾土为主要原料,工业废弃物煤矸石为添加剂,按照铝矾土煤矸石的质量比为7:3、6:4、5:5、4:6的比例分别混料,根据前期研究结果,选取1300℃的烧结温度烧结制备陶粒支撑剂,对比分析各配比下陶粒的体积密度、视密度和破碎率的变化趋势,并用XRD和SEM对陶粒的物相及微观形貌进行表征,结果表明:在本文的实验条件下,满足工业标准的煤矸石最大掺入量为50wt%,此时,35MPa闭合压力下破碎率为9.12%。掺入30wt%煤矸石时,制备的陶粒性能最好,此时陶粒支撑剂的体积密度为1.2881g/cm^(3),视密度为3.2485g/cm^(3),35MPa闭合压力下破碎率为7.91%。

关键词：煤矸石掺入量陶粒支撑剂固体废弃物

Atomically Dispersed Catalysts:Precise Synthesis,Structural Regulation,and Structure-Activity Relationship

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CCS Chemistry 2024年第4期6卷 833-855页

作者： yun gao Dingsheng Wang Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084

Atomically dispersed catalysts(ADCs)have been diffusely researched for the development of advanced catalytic processes owing to their welldefined structure,high atomic utilization,and outstanding *** decoding the intrinsic structures and coordination microenvironments of ADCs still confronts significant *** these challenges is important for profound understanding of the structure-activity relationships and directing the future design of ***,this minireview summarizes recent progress and advanced characterization techniques for the engineering of ADCs,including single-atom catalysts,dualatom catalysts,and atomic cluster catalysts with regard to precise synthesis,structural regulation,and the structure-performance *** catalytic merits and regulation strategies of recent breakthroughs in energy conversion,enzyme mimicry,and organic synthesis are thoroughly discussed to disclose the catalytic mechanism-guided ADCs ***,a comprehensive summary of the future challenges and potential prospects is presented to stimulate more design and application possibilities for *** believe that this comprehensive minireview will open up novel pathways for the widespread utilization of ADCs in diverse catalytic processes.

关键词： atomically dispersed catalysts precise synthesis structural regulation structure-activity relationship and catalytic application

Weyl Type Theorem for Bounded Linear Operator and Its Functional Calculus

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Acta Mathematica Sinica,English Series 2024年第2期40卷 528-536页

作者： gao Hui Zi feng Peng Tong LI School of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

Let H be a complex infinite dimensional Hilbert space and B(H)be the algebra of all bounded linear operators on *** this paper,we mainly study the operators that satisfy both a-Weyl's theorem and property(R).Also,the operators whose functional calculus satisfies the two properties are also *** give the features for the operator or its functional calculus for which both a-Weyl's theorem and property(R)hold.

关键词： a-Weyl's theorem property(R) functional calculus

Chronic sleep deprivation induces alterations in DNA and RNA modifications by liquid chromatography-mass spectrometry analysis

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Chinese Chemical Letters 2024年第8期35卷 413-417页

作者： Tian feng yun-Ling gao Di Hu Ke-Yu Yuan Shu-Yi Gu Yao-Hua Gu Si-Yu Yu Jun Xiong Yu-Qi feng Jie Wang Bi-feng Yuan School of Public Health Research Center of Public HealthRenmin Hospital of Wuhan UniversityWuhan UniversityWuhan 430071China Department of Radiation and Medical Oncology Zhongnan Hospital of Wuhan UniversityWuhan UniversityWuhan 430071China Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences-Wuhan National Laboratory for OptoelectronicsWuhan 430071China University of Chinese Academy of Sciences Beijing 101408China Institute of Neuroscience and Brain Diseases Xiangyang Central HospitalAffiliated Hospital of Hubei University of Arts and ScienceXiangyang 441000China Phase I Clinical Trial Laboratory Zhongnan Hospital of Wuhan UniversityWuhan 430071China

Sleep deprivation(SD)is a widespread issue that disrupts the lives of millions of *** effects ini-tiate as changes within neurons,specifically at the DNA and RNA level,leading to disruptions in neuronal plasticity and the dysregulation of various cognitive functions,such as learning and *** acid epigenetic modifications that could regulate gene expression have been reported to play crucial roles in this ***,there is a lack of comprehensive research on the correlation of SD with nucleic acid epigenetic *** the current study,we aimed to systematically investigate the landscape of modifications in DNA as well as in small RNA molecules across multiple tissues,including the heart,liver,kidney,lung,hippocampus,and spleen,in response to chronic sleep deprivation(CSD).Using liquid chromatography-tandem mass spectrometry(LC-MS/MS)analysis,we characterized the dynamic changes in DNA and RNA modification profiles in different tissues of mice under CSD ***,we ob-served a significant decrease in the level of 5-methylcytosine(5mC)and a significant increase in the level of 5-hydroxymethylcytosine(5hmC)in the kidney in CSD *** RNA modifications,we observed an overall increased trend for most of these significantly changed modifications across six tis-sues in CSD *** study sheds light on the significance of DNA and RNA modifications as crucial epigenetic markers in the context of CSD-induced stress.

关键词： Sleep deprivation Epigenetics Mass spectrometry DNA modification RNA modification Small RNA

Maximum Principle for Stochastic Control System with Elephant Memory and Jump Diffusion

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Journal of Systems Science & Complexity 2024年第4期37卷 1392-1412页

作者： feng Siqi gao Lei WANG Guangchen XIAO Hua School of Control Science and Engineering Shandong UniversityJinan 250061China School of Economics Shandong UniversityJinan 250100China School of Mathematics and Statistics Shandong UniversityWeihai 264209China

Motivated by a duopoly game problem,the authors study an optimal control problem where the system is driven by Brownian motion and Poisson point process and has elephant memory for the control variable and the state ***,the authors establish the unique solvability of an anticipated backward stochastic differential equation,derive a stochastic maximum principle,and prove a verification theorem for the aforementioned optimal control ***,the authors generalize these results to nonzero-sum stochastic differential game ***,the authors apply the theoretical results to the duopoly game problem and obtain the corresponding Nash equilibrium solution.

关键词： Anticipated backward stochastic differential equation elephant memory Fréchet derivative maximum principle stochastic delayed differential equation

Effect of oxide inclusions on MnS precipitates and tensile mechanical property of high-strength low-alloy steel

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Journal of Iron and Steel Research(International) 2024年第5期31卷 1210-1220页

作者： Xiao-yong gao Hong Wei Li-feng Zhang School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Materials Science and Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing100144China

The key role of oxide inclusions on the microstructure and mechanical property of a high-strength low-alloy steel was *** field emission scanning electron microscope equipped with energy-dispersive spectrometry was used to characterize MnS *** inclusions play an important role in the shape control of MnS *** oxides fovored to decrease the size and the aspect ratio of MnS *** less oxide inclusions in the steel,approximately over 16.7%MnS precipitates were with aspect ratio a>5 and pure MnS precipitates accounted for 75.9%in ***,with more oxide inclusions in the steel,only 7.4%MnS precipitates were with a>5 and pure MnS precipitates accounted for 60.1%in *** of MnS by oxide inclusions improved the strength and inhibited the *** oxide inclusions in the steel increased the yield strength and tensile strength of the steel in both longitudinal and transverse directions,and lowered the anisotropy of the mechanical property.

关键词： High-strength low-alloy steel MnS Oxide inclusion Mechanical property Anisotropy

Smart Gait:A Gait Optimization Framework for Hexapod Robots

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 146-159页

作者： yunpeng Yin feng gao Qiao Sun Yue Zhao Yuguang Xiao State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Lenovo Corporation ShanghaiChina AI Institute School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The current gait planning for legged robots is mostly based on human presets,which cannot match the flexible characteristics of natural *** paper proposes a gait optimization framework for hexapod robots called Smart *** Gait contains three modules:swing leg trajectory optimization,gait period&duty optimization,and gait sequence *** full dynamics of a single leg,and the centroid dynamics of the overall robot are considered in the respective *** Smart Gait not only helps the robot to decrease the energy consumption when in locomotion,mostly,it enables the hexapod robot to determine its gait pattern transitions based on its current state,instead of repeating the formalistic clock-set step *** Smart Gait framework allows the hexapod robot to behave nimbly as a living animal when in 3D movements for the first *** Smart Gait framework combines offline and online optimizations without any fussy data-driven training procedures,and it can run efficiently on board in real-time after *** experiments are carried out on the hexapod robot *** results show that the energy consumption is reduced by 15.9%when in *** gait patterns can be generated spontaneously both in regular and challenge environments,and when facing external interferences.

关键词： Gait optimization Swing trajectory optimization Legged robot Hexapod robot