6,821 research outputs found
Three types of statistics and the entropy bounds
We investigated the entropy bounds of the three types of statistics:
para-Bose, para-Fermi and infinite statistics. We showed that the entropy
bounds of the conventional Bose, Fermi statistics and their generalizations to
parastatistics obey the law, while the entropy bound of infinite
statistics obeys the area law. This suggests a close relationship between
infinite statistics and quantum gravity.Comment: 5 pages, pubished versio
Establishment of China Information Technology Outsourcing Early Warning Index Based on SVR
AbstractInformation technology outsourcing in China has developed fast, it plays a more and more important role in economic development of China. Economic analysis and early warning system of information technology outsourcing, which reflect the status of ITO, can promote the healthy development of the industry. This paper constructed the indicator system by the method of time difference relevance and peak-valley. The weight vector of each indicator is attained by using support vector regression. It also calculated the comprehensive early warning index and established the early warning index system. At last, we used a group of signal lamps to reflect the status at every time. Based on the reality of ITO in China, this paper found that the development speed of ITO is slowing in recent months, the government should take out some positive measures
An Analysis of Thickness-shear Vibrations of an Annular Plate with the Mindlin Plate Equations
The Mindlin plate equations with the consideration of thickness-shear
deformation as an independent variable have been used for the analysis of
vibrations of quartz crystal resonators of both rectangular and circular types.
The Mindlin or Lee plate theories that treat thickness-shear deformation as an
independent higher-order vibration mode in a coupled system of two-dimensional
variables are the choice of theory for analysis. For circular plates, we
derived the Mindlin plate equations in a systematic manner as demonstrated by
Mindlin and others and obtained the truncated two-dimensional equations of
closely coupled modes in polar coordinates. We simplified the equations for
vibration modes in the vicinity of fundamental thickness-shear frequency and
validated the equations and method. To explore newer structures of quartz
crystal resonators, we utilized the Mindlin plate equations for the analysis of
annular plates with fixed inner and free outer edges for frequency spectra. The
detailed analysis of vibrations of circular plates for the normalized frequency
versus dimensional parameters provide references for optimal selection of
parameters based on the principle of strong thickness-shear mode and minimal
presence of other modes to enhance energy trapping through maintaining the
strong and pure thickness-shear vibrations insensitive to some complication
factors such as thermal and initial stresses.Comment: Paper to be presented to the 2015 IEEE International Frequency
Control Symposium and European Frequency and Time Forum, Denver, CO, USA.
April 12-16, 201
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