The phase difference between the detected signal and RF magnetic field is denoted by φ. Then the Bloch equation for describing the precession of Xe nuclei is19 dMndt=−Ω×Mn−Γ⋅Mn+Rse, (1) where Mn represents the nuclear polarization vector, and Ω is the whole angular velocity ...
Identification of field-dependent quantum emitters.aOptical microscope image of an exfoliated h-BN flake on a patterned substrate. Scale bar denotes 10 μm.bPolarization-resolved PL image of suspended h-BN [denoted by the dashed box ina] atB = 0 G. The dashed curve indicates the edge ...
Emphasis is put onto the gravitational interaction of spinning objects. The gravitomagnetic field lines of a rotating or spinning object are given in analytic form.关键词:Spin gravitomagnetism angular momentum DOI: 10.1023/B:GERG.0000046180.97877.32 被引量: 87 ...
The device produced a field with a magnetic flux gradient of < 1.0 mT/mm in the portion of the central cavity where the cells were maintained during experiments. This arrangement contrasts with experimental set-ups where each well of a T. C. plate has been supplied with SMF exposure by ...
The individual terms of the equations are denoted and rewritten as(8)[Math Processing Error]where [Math Processing Error] and [Math Processing Error] for any vector field, [Math Processing Error]. The integral in [Math Processing Error] is performed by using the sloping boundary conditions, [...
We analyze cosmic ray data as well as interplanetary magnetic field (IMF) data, to examine the relation and correlation between their 27-day variations during the time interval 1965-1995. The amplitude of the 27day variation of galactic cosmic rays is linearly correlated with: the IMF strength ...
PROBLEM TO BE SOLVED: To provide an MgB<SB>2</SB>-based superconductor with high critical current density and high irreversible magnetic field. SOLUTION: This MgB<SB>2</SB>-based superconductor is produced by forming a mixture of powders such as Mg powder, B powder, element M powder and ...
Modeling and Sensorless Direct Torque and Flux Control of a Dual-Airgap Axial Flux Permanent-Magnet Machine With Field-Weakening Operation Zhang Qianfan,Wu Hongxing,Cheng Shukang.Flux weakening control of axial and radial air-gap hybrid magnetic-circuit multi-coupling motor[J] . Journal of ... ...
Then, according to the principle of magnetic field superposition, the vector sum of the two components is calculated to obtain the magnetic field at the crack: 𝐻=𝐻𝑋+𝐻𝑍H=HX+HZ (9) The surface magnetic charge densities in the crack stress concentration region are denoted as ρX ...
In this study, CI is found to be seemingly more closely correlated with the small-scale magnetic elements of Component-II than with the large-scale magnetic field of sunspots, therefore the active corona may probably be mainly heated by the small-scale magnetic elements of Component-II. Sunspots...