The linear servo systems have the advantages of high velocity, precise servo feeding, excellent stability and rapidly dynamic performance, which can be used as the most promising high-performance feeding system for CN...
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Armchair carbon nanocoils (CNCs) with different geometric parameters are constructed and optimized using a tight-binding (TB) total energy model. The quantum conductance of these nanocoils is simulated employing a π-...
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Armchair carbon nanocoils (CNCs) with different geometric parameters are constructed and optimized using a tight-binding (TB) total energy model. The quantum conductance of these nanocoils is simulated employing a π-orbital TB model incorporated with the non-equilibrium Green's function theory. Compared with the perfect armchair carbon nanotubes (CNTs) and armchair CNTs with only Stone-Wales (SW) defects, the quantum conductance spectra of the armchair CNCs present distinct gaps around the Fermi level, which are mainly originated from the existence of sp3 carbon in the three-dimensional spiral structures. Moreover, the detailed conductance spectra of the armchair CNCs depend sensitively on their geometric parameters, such as tubular diameter and block-block distance.
Nozzle cooling equipment is developed to supervise and control the heat flux by changing water flux. An in- dustrial experiment is held in billet caster in Huaigang . The results show that cooling control system works...
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Nozzle cooling equipment is developed to supervise and control the heat flux by changing water flux. An in- dustrial experiment is held in billet caster in Huaigang . The results show that cooling control system works stably and effectively to control the heat fluxes by the temperature of copper tube. The superheat of steel in mould is reduced and the equiaxed crystal ratio, as well as compact degree of steel is raised.
In view of the functional demands of the electrical control system for the intelligent cotton harvesting machine, the machine vision technology is employed. A cotton recognition method is proposed based on Hough trans...
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作者：
Jie YangYun-Sheng MaXiao-Yan TangSchool of Chemistry & Materials Engineering
Jiangsu Key Laboratory of Advanced Functional Materials Changshu Institute of Technology Changshu 215500 P.R.China School of Chemistry & Materials Engineering Jiangsu Key Laboratory of Advanced Functional Materials Changshu Institute of Technology
The dielectric properties of SbO-doped(BaSrNd)TiO ceramics fabricated by conventional solid state method were *** structure was identified by X-ray diffraction method and scanning electron microscope was also employed...
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ISBN:
(纸本)9783037951217
The dielectric properties of SbO-doped(BaSrNd)TiO ceramics fabricated by conventional solid state method were *** structure was identified by X-ray diffraction method and scanning electron microscope was also employed to observe the surface *** is confirmed that SbO-doped(BaSrNd)TiO ceramics exhibit perovskite structure and with increasing SbO content BaTiO(space group C2/c（15）) forms as a secondary *** experimental results reveal that the addition of SbO into(BaSrNd)TiO ceramics reduce the dielectric constant and Curie temperature due to the substitution for A/B-sites with Sb *** standing voltage increases with increasing SbOcontent while the dielectric loss and resistivity initially decrease and then increase with the increase of SbO *** temperature dependence of dielectric properties at different frequencies was studied as *** indicates that the tetragonal-cubic phase transition peak is suppressed as the SbO content increases and the peak value reduces with the increase of frequency.
Gear form grinding technology is widely used in the process of gear manufacturing. Grinding wheel dressing is the keytechnology of gear form grinding process. In this paper, several different grinding wheel dressing ...
Gear form grinding technology is widely used in the process of gear manufacturing. Grinding wheel dressing is the keytechnology of gear form grinding process. In this paper, several different grinding wheel dressing methods and the corresponding diamond roller dressing device are simply introduced. The technical parameters of grinding wheel dressing are respectively analyzed, including dressing speed ratio, overlap ratio, dressing depth and axial speed. The experimental tests of gear form grinding are carried out to investigate the effects of dressing parameters on the grinding process. The results of analysis and manufacturing tests can provide the reliable basis for diamond roller dressing in gear form grinding machine tools.
One of the prerequisites for AFM based nanomanipulation is that the position of the target nanoparticle can be stable controlled within a known area, while this prerequisite is still hindered by the uncertainties incl...
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Permanent magnetic synchronous motor (PMSM) with high speed, large torque and high power usually employs centralized high power, which increases the capacity of the transformer, and reduces the reliability of the syst...
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