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101.
Accuracy analysis of airborne gravity when gravimeter parameters are identified in flight 总被引:1,自引:0,他引:1
In airborne gravimetry the data received from an airborne survey system is used to obtain the specific gravity along the aircraft
path and to construct maps of the gravity anomaly. The quality of the maps depends largely on both the instrument noise and
modeling errors. The paper discusses the errors in the estimated gravity caused by imperfect calibration of the gravimeter
and how to calibrate the instrument using the survey flights data and the gravity maps.
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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 11, No. 7, pp. 167–180, 2005. 相似文献
102.
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104.
Transient field strengths were measured for184, 186W ions traversing thin, magnetized Fe foils with velocities in the range 1.8 ≲ υ/υ0 ≲ 5.7 (υ0 = Bohr velocity) and for188, 190, 192Os ions traversing polarized Ni hosts with average velocities 〈υ/υ0〉 ∼ 4. The present measured transient field strengths, together with previously measured results for W, Os ions, are compared
with transient field strength parametrizations, and discussed in terms of microscopic models of the transient field. 相似文献
105.
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108.
Tan YW Zhang Y Bolotin K Zhao Y Adam S Hwang EH Das Sarma S Stormer HL Kim P 《Physical review letters》2007,99(24):246803
The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20x10(3) cm2/V sec. Comparing the experimental data with the theoretical transport calculations based on charged impurity scattering, we estimate that the impurity concentration in the samples varies from 2-15x10(11) cm(-2). In the low carrier density limit, the conductivity exhibits values in the range of 2-12e2/h, which can be related to the residual density induced by the inhomogeneous charge distribution in the samples. The shape of the conductivity curves indicates that high mobility samples contain some short-range disorder whereas low mobility samples are dominated by long-range scatterers. 相似文献
109.
B. M. Bolotin Ya. A. Mikhlina S. A. Arkhipova L. G. Kuz’mina 《Crystallography Reports》2012,57(2):246-251
The crystal and molecular structures of two crystal forms (pale yellow form 1 and yellow form 2) of N-[2-(4-oxo-4H-benzo[d][1,3]oxazin-2-yl)phenyl]naphthalene-2-sulfonamide (Orlyum White 520T), which is an organic luminophore with an anomalously
high Stokes shift, were determined. Crystal 2 is a solvate with para-xylene. Crystal 1 is a solvent-free form. The molecular geometry in crystal 1 differs from that in 2 only in the orientation of the SO2
Ar substituent. The bond-length distribution in the planar moiety of the molecule in crystal 1 is virtually identical to that in 2, but the bonds in the NH-SO2
Ar-bearing benzene ring in crystal 1 are systematically longer than the corresponding bonds in crystal 2. This fact can be attributed to the crystal-packing effects. In 2 the molecules form stacked dimers with π-stacking interactions between two planar conjugated tricyclic systems. The charge
transfer in this system accounts for the intensification of the color of these crystals and the observed difference in the
optical properties of 1 and 2. 相似文献
110.
We propose a new method for constructing design models of high-rise buildings and structures, which is based on the treatment
of the set of bearing structures as discrete-continual inelastic damageable system admitting large spatial displacements and
rotations. We derive a relation for the virtual work functional with respect to increments of integral stress characteristics,
which can be viewed as a starting point for solving applied problems of simulation of structural dynamics under the action
of extreme forces. To take into account the processes of damage and failure of buildings and structures, we propose a generalized
scheme for constructing a nonlinear physical model of deformation on the level of integral stress characteristics in the bearing
structures of a storey. As an example of application of this model, we consider the problem of dynamic behavior of a multistorey
building under a spatial seismic load. 相似文献