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从“身临其境”到“设身处境”:论数字交往的身体观

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山东师范大学学报(社会科学版) 2025年第1期70卷 150-163页

作者：吴志远南京大学新闻传播学院江苏南京210009

在深度沉浸化的数字交往时代,身体观是根本性的媒介哲学命题之一。新技术的发展反映出两种并驾齐驱的思想趋势:其一是以元宇宙为代表的“在云端”身体观,身体被视为数字化的虚拟身体;其二是以感官仿真、身体赛博格化为代表的“在终端”... 详细信息

在深度沉浸化的数字交往时代,身体观是根本性的媒介哲学命题之一。新技术的发展反映出两种并驾齐驱的思想趋势:其一是以元宇宙为代表的“在云端”身体观,身体被视为数字化的虚拟身体;其二是以感官仿真、身体赛博格化为代表的“在终端”身体观,身体被视为技术化的物质身体。这两种身体观本质上依然未能跳脱传统身心二元论的局限。从泛体验论来分析,真正具有技术阐释力的身体观是从“身临其境”走向“设身处境”,即通过具身交往实现新技术环境中感官、知觉与交往情境的统一,其特征是:全息交互:沉浸体验的场景解放;情境联动:具身交往的身境合一;切身体会:关心主体的生存境况。

关键词：数字交往知觉身体泛体验论身体现象学身体观

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Modeling and assessment of fve-frequency BDS precise point positioning

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Satellite Navigation 2022年第1期3卷 114-127,I0004页

作者： zhiyuan wu Qianxin Wang Chao Hu Zhihao Yu Wei wu School of Environment and Surveying and Mapping China University of Mining and Technology1 Daxue RoadXuzhou 221100China School of Spatial Information and Surveying Engineering Anhui University of Science and Technology168 Taifeng StreetHuainan 232001China Guangzhou Hi-Target Navigation Tech Co. Ltd555 Panyu StreetGuangzhou 510000China

Since its full operation in 2020,BeiDou Satellite Navigation System(BDS)has provided global services with highly precise Positioning,Navigation,and Timing(PNT)as well as unique short-message *** and more academics focus on multi-frequency Precise Point Positioning(PPP)models,but few on BDS fve-frequency PPP ***,this study using the uncombined and Ionospheric-Free(IF)observations develops fve BDS fve-frequency PPP models and compares them with the traditional dual-frequency model,known as Dual-frequency IF(DF)*** biases such as Inter-Frequency Biases(IFB)and Diferential Code Bias(DCB)are also *** the data collected from 20 stations,the BDS dual-and fve-frequency PPP models are comprehensively evaluated in terms of the static and simulated kinematic positioning ***,the study also analyzes some by-product estimated parameters in fve-frequency PPP models such as Zenith Troposphere Delay(ZTD).The results of experiment show that fve-frequency PPP models have diferent levels of improvement compared with the DF *** the static mode,the one single Five-Frequency IF combination(FF5)model has the best positioning consequent,especially in the up direction,and in the simulated kinematic mode,the Three Dual-frequency IF combinations(FF3)model has the largest improvement in convergence time.

关键词： BDS-3 Five-frequency PPP IFB DCB ZTD

Experimental investigation about the incipient velocity of spherical particles on a hemispherical bed surface

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Particuology 2024年第5期88卷 49-61页

作者： Chuannan Li Jie Chen Changbo Jiang Xie Li zhiyuan wu School of Hydraulic and Environmental Engineering Changsha University of Science & TechnologyChangsha 410114China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province Changsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China

The sediment particles play a huge role in shaping the bed load *** this research,240 water-tunnel experiments are carried out to investigate the incipient velocity of the observation particles in two particle *** accurately predict the incipient velocity of the observation particles,the equation is conceived by the rolling instability *** incipient velocity equations and experimental data are used to analyze the trend of dispersive pressure and the effect of arrangement position on *** find that it is appropriate to choose the coefficient of drag as 0.261 and the coefficient of lift as 0.198 for the incipient velocity equation of spherical particles on the hemispherical bed ***,the dispersive pressure is closely related to the flow state,particle size,and particle arrangement,which leads to the incipient velocity of the observation particle being at a minimum when the interference particle angle is 45°.Finally,the particle spacing and the projected area changed with the arrangements,directly affecting the incipient velocity of the observed *** analysis of four aspects for the coefficients,dispersive pressure,different particle spacing,and projected area will facilitate the prediction of particle incipient velocity,especially on hemispherical beds.

关键词： Hemispherical bed surface Observed particle Interference particle Dispersive pressure Incipient velocity

PMAC Principle and Its Application to Cell Winding

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Journal of Rare Earths 2004年第z1期22卷 352-354页

作者： Zhao Xiaolong Yang yonggang Zhang zhiyuan wu Fengming Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China

The structure and principle of the PMAC (Programmable Multi-Axis Controller) were *** implementation of PMAC hardware was illustrated by taking the winding process of one cell for *** main obvious character of PMAC is to complete a movement program in turns of movement *** PMAC is notified to execute a motion program, it will process one command every time and finish all the calculation to be ready for real *** card works always prior to real action, when necessary, it can always coordinate correctly with the action which will be carried out soon PMAC will automatically carry out the function of resource management periodically to make sure that the whole system is in correct *** also, it can communicate with host computer anytime even during a movement *** responsibility of PMAC is to organize command according to priority to optimize the system, so as to run the application program safely and *** function and application of control were emphasized.

关键词： PMAC winding machine control encoder arbor movement program

Multi-blade rubbing characteristics of the shaft-disk-blade-casing system with large rotation

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Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 111-136页

作者： zhiyuan wu Linchuan ZHAO Han YAN Ge YAN Ao CHEN Wenming ZHANG State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Aerospace Systems Engineering Shanghai 201108China

Blade rubbing faults cause detrimental impact on the operation of aeroengines. Most of the existing studies on blade rubbing in the shaft-disk-blade-casing(SDBC) system have overlooked the elastic deformation of the blade, while some only consider the whirl of the rotor, neglecting its spin. To address these limitations, this paper proposes a dynamic model with large rotation for the SDBC system. The model incorporates the spin and whirl of the rotor, enabling the realistic reproduction of multiblade rubbing faults. To verify the accuracy of the SDBC model with large rotation and demonstrate its capability to effectively consider the rotational effects such as the centrifugal stiffening and gyroscopic effects, the natural characteristics and dynamic responses of the proposed model are compared with those obtained from reported research and experimental results. Furthermore, the effects of the rotating speed, contact stiffness,and blade number on the dynamic characteristics of the SDBC system with multi-blade rubbing are investigated. The results indicate that the phase angle between the rotor deflection and the unbalance excitation force increases with the increasing rotating speed,which significantly influences the rubbing penetration of each blade. The natural frequency of the SDBC system with rubbing constrain can be observed in the acceleration response of the casing and the torsional response of the shaft, and the frequency is related to the contact stiffness. Moreover, the vibration amplitude increases significantly with the product of the blade number under rubbing, and the rotating frequency approaches the natural frequency of the SDBC system. The proposed model can provide valuable insight for the fault diagnosis of rubbing in bladed rotating machinery.

关键词： shaft-disk-blade-casing(SDBC) large rotation spin and whirl multi-blade rubbing rotational effect

Sensitivity of WRF simulated typhoon track and intensity over the South China Sea to horizontal and vertical resolutions

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Acta Oceanologica Sinica 2019年第7期38卷 74-83页

作者： zhiyuan wu Changbo Jiang Bin Deng Jie Chen Xiaojian Liu School of Hydraulic Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China School for Marine Science and Technology University of Massachusetts DartmouthNew BedfordMA 02744USA Key Laboratory of the Pearl River Estuarine Dynamics and Associated Process Regulation Ministry of Water ResourcesGuangzhou 510611China

To determine the grid resolutions of the WRF model in the typhoon simulation,some sensitivity analysis of horizontal and vertical resolutions in different conditions has been carried *** horizontal resolutions(5,10,20,30 km),nesting grids(15 and 5 km),different vertical resolutions(35-layers,28-layers,20-layers)and different top maximum pressures(1 000,2 000,3 500,5 000 Pa)had been used in the mesoscale numerical model WRF to simulate the Typhoon *** simulation results of typhoon track,wind speed and sea level pressure at different horizontal and vertical resolutions have been compared and *** horizontal and vertical resolutions of the model have limited effect on the simulation effect of the typhoon *** horizontal and vertical resolutions have obvious effects on typhoon strength(defined by wind speed)and intensity(defined by sea level pressure,SLP),especially for sea level *** typhoon intensity simulated by the high-resolution model is closer to the real situation and the nesting grids can improve computational accuracy and *** simulation results affected by vertical resolution using 35-layers is better than the simulation results using 20-layers and 28-layers *** comparison and analysis,the horizontal and vertical resolutions of WRF model are finally determined as follows:the two-way nesting grid of 15 and 5 km is comprehensively determined,and the vertical layers is 35-layers,the top maximum pressure is 2 000 Pa.

关键词： sensitivity analysis typhoon track and intensity horizontal and vertical resolutions Typhoon Kai-tak WRF

Blade-Loss-Caused Rubbing Dynamic Characteristics of Rotor-Bladed Disk-Casing System

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第1期35卷 116-125页

作者： Zeng Jin Ma Hui Ma Xinxing wu zhiyuan Qin Zhaoye School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819P.R.China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240P.R.China Shanghai Institute of Space Power-Sources Shanghai 200245P.R.China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084P.R.China

Considering the elastic supports,the finite element model of rotor-bladed disk-casing system is established using commercial software ANSYS/*** that broken blade is released from the disk,the complicate rubbing responses of unbalanced rotor-bladed disk-casing system are studied under different operational *** addition,influences of both plastic deformation of blade and casing failure are *** results show that there exist some multiple even fractional frequencies in the transient and steady vibration responses of unbalanced ***,one nodal diameter vibration of bladed disk coupling with the lateral vibration of the shaft as well as the first order bending vibration of blade can be excited under low operational speed,while the first order bending vibration of blade coupling with the lateral vibration of disk-shaft is easily excited under high operational *** rubbing process,three distinct contact states can be observed:broken blade-casing contact,broken blade-blade component-casing contact and broken blade-casing contact/blade component-casing contact/blade *** is worth noting that the third contact state is related to the operational *** the increase of operational speed,self-contact in the blade may occur.

关键词： rotor-bladed disk-casing system blade loss rubbing casing failure elastic supports

The exchange interaction between neighboring quantum dots:physics and applications in quantum information processing

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Journal of Semiconductors 2024年第10期45卷 20-34页

作者： Zheng Zhou Yixin Li zhiyuan wu Xinping Ma Shichang Fan Shaoyun Huang School of Electronics Beijing Key Laboratory of Quantum Devices Key Laboratory for the Physics and Chemistry of Nanodevices Peking UniversityBeijing 100871China

Electron spins confined in semiconductor quantum dots(QDs)are one of potential candidates for physical implementation of scalable quantum information processing *** coupling based inter exchange interaction between QDs is crucial in achieving single-qubit manipulation,two-qubit gate,quantum communication and quantum *** review first provides a theoretical perspective that surveys a general framework,including the Helter−London approach,the Hund−Mulliken approach,and the Hubbard model,to describe the inter exchange interactions between semiconductor quantum *** electrical method to control the inter exchange interaction in a realistic device is proposed as *** the significant achievements of inter exchange interaction in manipulating single qubits,achieving two-qubit gates,performing quantum communication and quantum simulation are *** last part is a summary of this review.

关键词： exchange interaction quantum dots tunnel coupling quantum computation

An available formula of the sandy beach state induced by plunging waves

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Acta Oceanologica Sinica 2017年第9期36卷 91-100页

作者： JIANG Changbo wu zhiyuan CHEN Jie DENG Bin LONG Yuannan LI Lianjie School of Hydraulic Engineering Changsha University of Science and Technology Changsha 410004 China Key Laboratory of Hunan Province for Water-sediment Sciences and Water Disaster Prevention School of Hydraulic Engineering Changsha University of Science and Technology Changsha 410004 China 0004 China

Laboratory experiments are performed to explore the response rule of a sandy beach profile under plunging wave on a non-uniform sediment-bed slope. The initial beach slope of combination of 1/10 and 1/20 is exposed to regular waves and cnoidal waves respectively. The free surface elevation, process of wave propagation, wave breaking, uprush and backwash and the change of a cross-shore beach profile are measured and recorded. The beach profile under the regular waves action exhibits two parts： a sandbar profile and a beach berm profile, and only one typical profile transformation under the cnoidal waves action is obtained, which is the beach berm profile. In the laboratory experiments, it is found that the beach states under wave action related to the previous factors. In addition, they are related to the characteristic of breaking waves such as the breaking intensity of the plunging wave. A concept about the characteristic angle of the plunging wave has been put forward through the observation and analysis of the phenomenon of the laboratory experiment. A qualitative analysis about the sediment transport carrying by currents generated from the plunging wave and the state of beach profile under the wave action has been done. The quantitative analysis about the relationship between the characteristic angle and Irribarren number has been done. An available formula of equilibrium states for the sandy beach induced by the plunging wave has been established based on the relationship between Irribarren number and the beach profile. By fitting these experimental results and others＇ experimental results to three lines, the three fitting coefficients can be calculated in their formula respectively. The recommended empirical formulas can divide three states of a beach morphology profile obviously, which include a depositive beach, an erosive beach and an intermediate beach.

关键词： formula of beach state plunging wave experimental study regular wave cnoidal wave