3,391 research outputs found
Does High-tech Export Cause More Technology Spillover? Evidence from Contemporary China
This paper attempts to investigate whether high-tech product export causes more technology spillover compared with traditionally primary manufactured goods export.A generalized multi-sector spillover model is presented to involve the causations of export composition and technology spillover, which is based on two distinctive approaches of measuring technology spillover: “between-spillover” and “within-spillover”. The empirical estimation is conducted with a panel analysis involving 31 provinces in China over the period of 1998-2005. Although high-tech export sectors involve a higher productivity compared with other sectors, this productivity advantage in high-tech export sectors does not cause technology spillover towards both domestic sectors and other export sectors. Therefore, this paper suggests that technology spillover of export mainly takes place in traditional export sectors rather than high-tech export sectors.Export Composition; High-tech Export; Technology Spillover; Multi-sector Spillover Model
Lorentz transformation in Maxwell equations for slowly moving media
We use the method of field decomposition, a technique widely used in
relativistic magnetohydrodynamics, to study the small velocity approximation
(SVA) of the Lorentz transformation in Maxwell equations for slowly moving
media. The "deformed" Maxwell equations derived under the SVA in the lab frame
can be put into the conventional form of Maxwell equations in the medium's
comoving frame. Our results show that the Lorentz transformation in the SVA up
to ( is the speed of the medium and is the speed of light in
vacuum) is essential to derive these equations: the time and charge density
must also change when transforming to a different frame even in the SVA, not
just the position and current density as in the Galilean transformation. This
marks the essential difference of the Lorentz transformation from the Galilean
one. We show that the integral forms of Faraday and Ampere equations for slowly
moving surfaces are consistent with Maxwell equations. We also present Faraday
equation the covariant integral form in which the electromotive force can be
defined as a Lorentz scalar independent of the observer's frame. No evidences
exist to support an extension or modification of Maxwell equations.Comment: 16 pages, 1 figure, 3 tables. Section VI is added about integral
forms of Faraday and Ampere laws for moving surfaces. Part of Section IV and
V are rewitte
DCTTS: Discrete Diffusion Model with Contrastive Learning for Text-to-speech Generation
In the Text-to-speech(TTS) task, the latent diffusion model has excellent
fidelity and generalization, but its expensive resource consumption and slow
inference speed have always been a challenging. This paper proposes Discrete
Diffusion Model with Contrastive Learning for Text-to-Speech Generation(DCTTS).
The following contributions are made by DCTTS: 1) The TTS diffusion model based
on discrete space significantly lowers the computational consumption of the
diffusion model and improves sampling speed; 2) The contrastive learning method
based on discrete space is used to enhance the alignment connection between
speech and text and improve sampling quality; and 3) It uses an efficient text
encoder to simplify the model's parameters and increase computational
efficiency. The experimental results demonstrate that the approach proposed in
this paper has outstanding speech synthesis quality and sampling speed while
significantly reducing the resource consumption of diffusion model. The
synthesized samples are available at https://github.com/lawtherWu/DCTTS.Comment: 5 pages, submitted to ICASS
4-Bromoanilinium hexafluorophosphate monohydrate
In the title compound, C6H7BrN+·PF6
−·H2O, N—H⋯F, N—H⋯O and O—H⋯F hydrogen-bonding interactions stabilize the crystal structure and give rise to to chains running parallel to the c axis. In the anion, four of the F atoms are disordered over two sets of sites of equal occupancy
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