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元宇宙服务的人机交互综述

郑州大学学报（理学版） 2025年第1期57卷 8-14页

作者：高俊涛程玉玉东北石油大学计算机与信息技术学院黑龙江大庆163318

近年来,元宇宙飞速发展,已成为未来数字世界的一个重要发展方向。元宇宙中的人机交互是实现虚实融合的核心,其解决了元宇宙中的多用户协作、沟通、社交等挑战,促进了创新和合作。为了深入探讨元宇宙作为虚拟和现实世界融合的数字化空间... 详细信息

近年来,元宇宙飞速发展,已成为未来数字世界的一个重要发展方向。元宇宙中的人机交互是实现虚实融合的核心,其解决了元宇宙中的多用户协作、沟通、社交等挑战,促进了创新和合作。为了深入探讨元宇宙作为虚拟和现实世界融合的数字化空间,其服务如何与人机交互相结合,创造出丰富、沉浸式、个性化的用户体验,调研了元宇宙和人机交互技术,并从人机交互的角度对元宇宙的概念进行了定义。讨论了元宇宙服务和人机融合的可行性与优势,并整理归纳了现有的挑战。最后探讨了元宇宙服务的未来发展趋势。

关键词：元宇宙服务人机交互数字化空间

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A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-Peng Yang Song Xie Zi-Meng Han Hao-cheng Liu Chong-Han Yin Wen-Bin Sun Zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-Fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Promoting effect of Mn on Cu-based catalysts for methanol synthesis

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Chinese Science Bulletin 1997年第13期42卷 1100-1103页

作者： Li, JT Gao, lz Zhang, WD Lin, J Chen, HY Tan, KL Department of Chemistry Institute of Physical Chemistry Xiamen University Xiamen 361005 China Department of Physics National University of Singapore Singapore 0511 Singapore

METHANOL is a chemical manufactured world-wide and its production is of interest from bothindustrial and academic points of view. It is used as gasoline extenders and in the manufac-ture of methyl tetra-butyl ether which is used as an octane enhancer in gasoline. The search forpotential additives has been carried out since the discovery of the promoting effect. In thisnote, we report the promoting effect of Mn on Cu-Zn-Al catalyst. The results indicated

关键词： methanol synthesis high collision co-precipitation promoted effect HCOO intermediate.

Hybrid algorithm for project scheduling with capacity constraint

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Journal of Systems Engineering and Electronics 2008年第5期19卷 1041-1046页

作者： cheng Xu Wu cheng Dept. of Automation Tsinghua Univ. Beijing 100084 P. R. China China Academy of Electronics Information Technology Beijing 100041 P. R. China

Motivated by the projects constrained by space capacity and resource transporting time, a project scheduling probIem with capacity constraint was modeled. A hybrid algorithm is proposed, which uses the ideas of bi-level scheduling and project decomposition technology, and the genetic algorithm and tabu search is combined. Topological reordering technology is used to improve the efficiency of evaluation. Simulation results show the proposed algorithm can obtain satisfied scheduling results in acceptable time.

关键词： project scheduling capacity constraint heuristic algorithm bi-level scheduling.

An accurate determination of the Hubble constant from baryon acoustic oscillation datasets

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Science China(Physics,Mechanics & Astronomy) 2015年第9期58卷 103-108页

作者： cheng cheng HUANG QingGuo State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences University of the Chinese Academy of Sciences

Even though the Hubble constant cannot be significantly determined just by the low-redshift Baryon Acoustic Oscillation(BAO)data, it can be tightly constrained once the high-redshift BAO data are combined. We combined BAO data from 6d FGS, BOSS DR11 clustering of galaxies, Wiggle Z and z = 2.34 from BOSS DR11 quasar Lyman-α forest lines to get H0= 68.17+1.55-1.56 km s-1Mpc-1. In addition, we adopted the simultaneous measurements of H(z) and DA(z) from the two-dimensional two-point correlation function from BOSS DR9 CMASS sample and two-dimensional matter power spectrum from SDSS DR7 sample to obtain H0=(68.11±1.69) km s-1Mpc-1. Finally, combining all of the BAO datasets, we conclude that H0=(68.11±0.86) km s-1Mpc-1, a1.3% determination.

关键词： Hubble constant baryon acoustic oscillation large-scale structure

The Tip60/Ep400 chromatin remodeling complex impacts basic cellular functions in cranial neural crest-derived tissue during early orofacial development

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International Journal of Oral Science 2023年第2期15卷 241-254页

作者： Sebastian Gehlen-Breitbach Theresa Schmid Franziska Frob Gabriele Rodrian Matthias Weider Michael Wegner Lina Gölz Institut für Biochemie Friedrich-Alexander-Universit?t Erlangen-NürnbergErlangenGermanyand Zahnklinik 3-Kieferorthopodie Universitotsklinikum Erlangen und Friedrich-Alexander-Universitot Erlangen-NürnbergErlangenGermany

The cranial neural crest plays a fundamental role in orofacial development and ***,mutations with impact on the cranial neural crest and its development lead to orofacial malformations such as cleft lip and *** a pluripotent and dynamic cell population,the cranial neural crest undergoes vast transcriptional and epigenomic alterations throughout the formation of facial structures pointing to an essential role of factors regulating chromatin state or transcription levels.

关键词： neural functions alterations

Identification methods for anomalous stress region in coal roadways based on microseismic information and numerical simulation

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International Journal of Mining Science and Technology 2017年第3期27卷 525-530页

作者： Liu Chao Li Shugang cheng cheng cheng Xiaoyu College of Safety Science and Engineering Xi'an University of Science & Technology Xi'an 710054 China Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education Xi'an University of Science & Technology Xi'an 710054 China

It is believed that the microseismicity induced by mining effect and gas gradient disturbance stress is a precursor to the essential characteristics of roadway unstability. In order to effectively identify and evaluate the stability of coal roadways in the process of mine development and extraction, a microseismic monitoring system was deployed for the study of the stress evolution process, damage degree and distribution characteristics in the tailgate and headgate. The mine under study is the 62113 outburst working face of Xin Zhuangzi coalmine in Huainan mining area. The whole process of microfractures initiation,extension, interaction and coalescence mechanisms during the progressive failure processes of the coal rock within the delineated and typical event clusters were investigated by means of a two dimensional realistic failure process analysis code(RFPA2D-Flow). The results show that the microseismic events gradually create different-sized event clusters. The microseismicity of the tailgate is significantly higher than that of the headgate. The study indicates that the greater anomalous stress region matches the area where microfractures continuously develop and finally connect to each other and form a fissure *** to the mine layout and stress concentration, the ruptured area is mainly located on the left shoulder of the tailgate roof. The potential anomalous stress region of the coal roadway obtained by numerical simulation is relatively in good agreement with the trend of spatial macro evolution of coal rock microfractures captured by the microseismic monitoring system. The research results can provide important basis for understanding instability failure mechanism of deep roadway and microseismic activity law in complex geologic conditions, and it ultimately can be used to guide the selection and optimization of reinforcement and protection scheme.

关键词： Microseismic monitoring technology Numerical simulation Anomalous stress region Event clusters Microcracks

Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 262-270页

作者： Jingwei cheng National Safety Engineering Technology Research Centre for Pressure Vessels and Pipelines Hefei General Machinery Research Institute Co.Ltd.Hefei 230031China

A diffuse acoustic field has been increasingly used to infer temporal changes in the structures,such as early dislo-cations and *** study explores three different techniques to characterise acoustic field by using a single ultrasonic phased *** first two techniques are proposed to measure spatial uniformity of wave field by examining differences in the integral of energy and the maximum energy respectively at multiple inspection *** third one is developed to evaluate the degree of phase coherence between propagating waves transmitted sequentially by two neighbouring array *** efficacy of these techniques are investigated by examining their metrics on simulations and well-known *** results suggest that two selected metrics can be used to quantitatively estimate the diffuse field start time as well as the field size by comparing their value with the idealised diffuse state(15%for the energy integral metric,ηarea and 1 for the phase coherence metric,ηphase)and identifying the convergence start point.

关键词： Diffuse wave field Ultrasonic phased array Sensing Signal processing

Quantitative simulation and prediction of extreme geological events

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Science China Earth Sciences 2022年第6期65卷 1012-1029页

作者： Qiuming cheng School of Earth Science and Engineering Sun Yat-Sen UniversityZhuhai 915000China State Key Lab of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China

The systematic study of extreme geological events(such as plate collision and subduction, extreme cold and extreme hot events, biological extinction and revival, earthquakes, volcanoes, mineralization, and oil accumulation) that occurred during the evolution of the earth is essential not only for understanding the “abrupt changes in the evolution of the earth”, but also for an in-depth understanding of the co-evolution of material-life-environment of the livable earth. However, due to the temporal and spatial anomalies and complexity of extreme geological events, classical mathematical models cannot be effectively applied to quantitively describe such events. After comparative studies of many types of geological events, the author found that such extreme geological events often depict “singular” characteristics(abnormal accumulation or depletion of matter or massive release or absorption of energy in a small space or time interval). On this basis, the author proposes a unified definition of extreme geological events, a new concept of “fractal density” and a “local singularity analysis” method for quantitative description and modeling of extreme geological events. Applications of these methods to several types of extreme geological events have demonstrated that the singularity theory and methods developed in the current research can be used as general approaches for the characterization, simulation, and prediction of geological events.

关键词： Mathematical geosciences Nonlinearity Geocomplexity Multifractals Chaos Phase transition Multiplicative cascade processes

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