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Research on the Dynamic Model of Spindle Rotation Induced Error Compensation System of Boring and its Simulation
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作者 杜正春 李春梅 颜景平 《Journal of Southeast University(English Edition)》 EI CAS 1999年第2期92-97,共6页
In this paper we address the dynamics of compensation cutting process from both Laplace s frequency domain and the time domain of the first time, using the two computer aided analyzing softwares: MATLAB and SIMULI... In this paper we address the dynamics of compensation cutting process from both Laplace s frequency domain and the time domain of the first time, using the two computer aided analyzing softwares: MATLAB and SIMULINK. Theoretical analysis and simulation experiments firstly show that not only the systematical stiffness of workpiece, spindle and tools, but also the regenerated coefficient affects the compensation displacement effect. The results show that the SREC is practicable in reality to decease the spindle induced errors in many engineering applications such as hard boring through simulation and the preliminary experiment results. 展开更多
关键词 spindle rotation induced error compensation (SREC) dynamic simulation regenerated coefficient μ boring process
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A review of optically induced rotation
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作者 Qi ZHU Nan LI +2 位作者 Heming SU Wenqiang LI Huizhu HU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2022年第2期171-185,共15页
The optical rotation technique arose in the 1990 s.Optical tweezer brought an ideal platform for research on the angular momentum of laser beams.For decades,the optical rotation technique has been widely applied in la... The optical rotation technique arose in the 1990 s.Optical tweezer brought an ideal platform for research on the angular momentum of laser beams.For decades,the optical rotation technique has been widely applied in laboratory optical manipulation and the fields of biology and optofluidics.Recently,it has attracted much attention for its potential in the classical and quantum regimes.In this work,we review the progress of experiments and applications of optically induced rotation.First,we introduce the basic exploration of angular momentum.Then,we cover the development and application of optical rotation induced by orbital angular momentum,and the spin angular momentum is presented.Finally,we elaborate on recent applications of the optical rotation technique in high vacuum.As precise optical manipulation in a liquid medium enters its maturity,optical tweezers in high vacuum open a new path for the high-speed micro-rotor. 展开更多
关键词 Optical tweezer Optically induced rotation Angular momentum Micro-rotor
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Poloidal rotation induced by injecting lower hybrid waves in tokamak plasma edge 被引量:1
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作者 焦一鸣 高庆第 石秉仁 《Plasma Science and Technology》 SCIE EI CAS CSCD 2001年第1期607-611,共5页
The poloidal rotation of the magnetized edge plasma in tokamak driven by the ponderomotive force which is generated by injecting lower hybrid wave(LHW) electric field has been studied. The LHW is launched from a waveg... The poloidal rotation of the magnetized edge plasma in tokamak driven by the ponderomotive force which is generated by injecting lower hybrid wave(LHW) electric field has been studied. The LHW is launched from a waveguide in the plasma edge, and by Brambilla's grill theory, analytic expressions for the wave electric field in the slab model of an inhomogeneous cold plasma have been derived. It is shown that a strong wave electric field will be generated in the plasma edge by injecting LH wave of the power in MW magnitude, and this electric field will induce a poloidal rotation with a sheared poloidal velocity. 展开更多
关键词 Poloidal rotation induced by injecting lower hybrid waves in tokamak plasma edge
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The Pulsation Induced by Mass Transfer in Critically Rotating Stars
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作者 王江涛 宋汉峰 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第9期136-139,共4页
The structural characteristics of the critically rotating accretor in binaries are investigated during rapid mass transfer. It is found that the accretor is subjected to periodic pulsation due to accretions and reject... The structural characteristics of the critically rotating accretor in binaries are investigated during rapid mass transfer. It is found that the accretor is subjected to periodic pulsation due to accretions and rejections of mass and angular momentum. Tile gainer attempts to attain both hydrostatic and thermal balances. This physical process can cause tile thermal structure of the accreting star to fluctuate with a period of ~ 0.19 y. Stellar wind can be enhanced by a factor of ~1.25 ×10^4 when the accretor approaches break-down velocity. Surface entropy and density decrease with the increase of the stellar radius due to the fact that rapid rotation leads to a reduction in the number density and surface temperature. The rotational energy has the same trend as stellar radius due to stellar expansion. Surface opacity which is extremely sensitive to surface temperature has an opposite trend to stellar radius. Moreover, the rate of nuclear energy must be adjusted due to mass removal or accretion at the stellar surface. 展开更多
关键词 of IS on IT AS The Pulsation induced by Mass Transfer in Critically Rotating Stars in by
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Mechanically tunable metamaterials terahertz dual-band bandstop filter 被引量:1
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作者 胡放荣 胥欣 +2 位作者 李鹏 徐新龙 王月娥 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第7期183-187,共5页
We experimentally demonstrate a mechanically tunable metamaterials terahertz(THz) dual-band bandstop filter. The unit cell of the filter contains an inner aluminum circle and an outside aluminum Ohm-ring on high res... We experimentally demonstrate a mechanically tunable metamaterials terahertz(THz) dual-band bandstop filter. The unit cell of the filter contains an inner aluminum circle and an outside aluminum Ohm-ring on high resistance silicon substrate. The performance of the filter is simulated by finite-integration-time-domain(FITD) method. The sample is fabricated using a surface micromachining process and experimentally demonstrated using a THz time-domain-spectroscopy(TDS) system. The results show that, when the incident THz wave is polarized in y-axis, the filter has two intensive absorption peaks locating at 0.71 THz and 1.13 THz, respectively. The position of the high-frequency absorption peak and the amplitude of the low-frequency absorption peak can be simultaneously tuned by rotating the sample along its normal axis.The tunability of the high-frequency absorption peak is due to the shift of resonance frequency of two electrical dipoles,and that of the low-frequency absorption peak results from the effect of rotationally induced transparent. This tunable filter is very useful for switch, manipulation, and frequency selective detection of THz beam. 展开更多
关键词 METAMATERIALS terahertz(THz) bandstop filter mechanically tunable rotationally induced transparent(RIT)
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A Thermal Analogue of the Zel’Dovich Effect
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作者 Gianpaolo Bei 《Journal of Applied Mathematics and Physics》 2023年第12期3970-3983,共14页
We analyze in this work anisotropic heat conduction induced by a harmonically oscillating laser source incident on rotating conductors, exploiting an analogy with an effect discovered long ago, called the Zel’dovich ... We analyze in this work anisotropic heat conduction induced by a harmonically oscillating laser source incident on rotating conductors, exploiting an analogy with an effect discovered long ago, called the Zel’dovich effect. We re-covered the main results of a recently published paper that predicts the translational Doppler frequency shift of a thermal wave induced on a sample moving with uniform rectilinear motion. We extend then this framework to take into account the frequency shift of a thermal field propagating on a rotating platform. We show that it coincides with the rotational frequency shift which has been recently observed on surface acoustic waves and hydrodynamic surface waves, called rotational superradiance. Finally, we use an analogy with the Tolman effect to deduce a simple estimate of the average temperature gradient induced by rotation, showing the existence of a new cooling effect associated with heat torque transfer. 展开更多
关键词 Anisotropic Heat Diffusion Chiral Spinning Thermal Waves Heat Vortex Beams Thermal Doppler Effect Thermal Zel’dovich Effect Thermal Polarization Vector rotation induced Tolman Cooling Effect
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Dynamic Analysis and Simulation of an Optically Levitated Rotating Ellipsoid Rotor in Liquid Medium
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作者 Qi ZHU Nan LI +2 位作者 Heming SU Wenqiang LI Huizhu HU 《Photonic Sensors》 SCIE EI CSCD 2022年第2期105-116,共12页
Optical trap,a circularly polarized laser beam can levitate and control the rotation of microspheres in liquid medium with high stiffness.Trapping force performs as confinement while the trapped particle can be analog... Optical trap,a circularly polarized laser beam can levitate and control the rotation of microspheres in liquid medium with high stiffness.Trapping force performs as confinement while the trapped particle can be analog to a liquid floated gyroscope with three degree-of-ffeedom.In this work,we analyzed the feasibility of applying optically levitated rotor in the system.We presented the dynamic analysis and simulation of an ellipsoid micron particle.The precession motion and nutation motion of a rotating ellipsoid probe particle in optical tweezers were performed.We also analyzed the attitude changes of an optically levitated ellipsoid when there was variation of the external torque caused by deviation of the incident light that was provided.Furthermore,the trail path of the rotational axis vertex and the stabilization process of a particle of different ellipticities were simulated.We compared the movement tendencies of particles of different shapes and analyzed the selection criteria of ellipsoid rotor.These analytical formulae and simulation results are applicable to the analysis of the rotational motion of particles in optical tweezers,especially to the future research of the gyroscope effect. 展开更多
关键词 Optical Tweezers ROTOR optically induced rotation dynamic analysis
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Microstructure evolution of Mg-Zn-Zr magnesium alloy against soft steel core projectile 被引量:3
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作者 Abdul Malik Yangwei Wang +2 位作者 Huanwu Cheng Faisal Nazeer Muhammad Abubaker Khan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第20期46-61,共16页
The study aimed to shed light on the post deformation and damage behavior of an extruded Mg-Zn-Zr alloy under a ballistic impact.The results revealed that the initial microstructure consisted of both{0001}basal and{10... The study aimed to shed light on the post deformation and damage behavior of an extruded Mg-Zn-Zr alloy under a ballistic impact.The results revealed that the initial microstructure consisted of both{0001}basal and{1010}prismatic fiber texture.After impact,adiabatic shear bands,pronounce different twinning in big grains,,<c>,and<c+a>types of dislocations,and grain refinement through twinning induce recrystallization accommodated the strain,and absorbed∼65.7%of the energy during impact carried by a soft steel projectile.Interestingly,the deformation behavior at the top broad sides of the crater was entirely different.The weak basal texture was changed to a strong prismatic texture,which was further proved by typical sigmoidal compressive stress-strain curves.A revised model for the development of the ultra-fine grains adjacent to the crater has been proposed.The microhardness and yield strength was∼33%and∼40%higher and chiefly ascribed to strain hardening in ultra-fine grained near the surface of the perforation path.The exit of the perforation path was severely damaged and forms onion-shaped concentric rings which were comprised of melted zones,dimples,and cracks.Based on the all interesting findings,this study can be a clue for the development of the lightweight Mg alloy for military and aerospace applications. 展开更多
关键词 Mg alloy Soft steel core Ballistic impact Texture Twin induce rotational dynamic recrystallization CDRX
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