3,790 research outputs found
Estimating Chinese Interprovincial OutPut Spillovers with Provincial Input-Output Tables
This paper aims at estimating productivity improvement of Chinese 17 relatively backward provinces in manufactures through importing manufactured intermediates from advanced provinces on the basis of just published 2002 national and provincial input-output tables. As Chinese regional inequality remains large, North-South spillover models of trade are appropriate to guide this study. Applying reliable methods to approximate net interprovincial imports by province and sector and the allocation of imported manufactured inputs among sectors within each province, we use a Cob-Douglas production function incorporating Dixit-Stiglitz type increasing returns to variety to deal with the manufactured inputs, and treat the output spillovers as one part of total factor productivity. According to our estimations, as expected, interprovincial imports of manufactured inputs have significant impacts on industrial sectors as well on all sectors of these provinces.Chinese interprovincial trade;North-South spillovers;input-output tables;regional inequality;imported intermediates
Estimating Chinese Interprovincial OutPut Spillovers with Provincial Input-Output Tables
This paper aims at estimating productivity improvement of Chinese 17 relatively backward provinces in manufactures through importing manufactured intermediates from advanced provinces on the basis of just published 2002 national and provincial input-output tables. As Chinese regional inequality remains large, North-South spillover models of trade are appropriate to guide this study. Applying reliable methods to approximate net interprovincial imports by province and sector and the allocation of imported manufactured inputs among sectors within each province, we use a Cob-Douglas production function incorporating Dixit-Stiglitz type increasing returns to variety to deal with the manufactured inputs, and treat the output spillovers as one part of total factor productivity. According to our estimations, as expected, interprovincial imports of manufactured inputs have significant impacts on industrial sectors as well on all sectors of these provinces
Fabric-evoked prickle of fabrics made from single fibres using axial fibre-compression-bending analyzer
Fabrics made from cotton, cashmere, flax, hemp, ramie, jute, and wool fibres, have been used to investigate and analyze the prickle comfort properties of fabrics worn as garments. Physical properties include single-fibre critical load, compression and bending modules, which greatly affect the fabric physiological comfort. The fibres are tested using a ‘fibre axial compression-bending analyzer’. The behavior mechanisms of single-needle fibre are also analyzed, evaluated, and explained using fibres critical load, fineness, and protruding length. Physical and neuro-physiological basis for prickle sensation force from single-needle fibre depends on its bending modulus and axial compressive behavior. This experimental work shows that the bending modulus of ramie, jute, and wool fibre is significantly high as compared to other fibres. Thus, high prickle values of ramie, jute and wool fibres make them more uncomfortable due to the cross-section parameters and bending modulus of the single fibre needle. It is observed that the prickle feeling comes from the axial-compressive behavior and the number of effective fibre needles protruding from worn fabric surface. Therefore, prickle sensation aroused during skin–fabric contact is mostly related to the fibre and surface roughness characteristics of fabrics, and the effect of the fabric material on prickle is found to be more
Metasurface-mediated anisotropic radiative heat transfer between nanoparticles
Metasurfaces, the two-dimensional (2D) counterpart of metamaterials, have
recently attracted a great attention due to their amazing properties such as
negative refraction, hyperbolic dispersion, manipulation of the evanescent
spectrum. In this work, we propose a theory model for the near field radiative
heat transfer (NFRHT) between two nanoparticles in the presence of an
anisotropic metasurface. Specifically, we set the metasurface as an array of
graphene strips (GS) since it is an ideal platform to implement any metasurface
topology, ranging from isotropic to hyperbolic propagation. We show that the
NFRHT between two nanoparticles can not only be significantly amplified when
they are placed in proximity of the GS, but also be regulated over several
orders of magnitude. In this configuration, the anisotropic surface plasmon
polaritons (SPPs) supported by the GS are excited and provide a new channel for
the near-field energy transport. We analyze how the conductance between two
nanoparticles depends on the orientation, the structure parameters and the
chemical potential of the GS, on the particle-surface or the particle-surface
distances by clearly identifying the characteristics of the anisotropic SPPs
such as dispersion relations, propagation length and decay length. Our findings
provide a powerful way to regulate the energy transport in the particle
systems, meanwhile in turn, open up a way to explore the anisotropic optical
properties of the metasurface based on the measured heat transfer properties.Comment: 17 pages, 8figures, Journa
Methyl 9H-carbazole-9-acetate
The title compound, C15H13NO2, was synthesized by N-alkylation of methyl bromoacetate with 9H-carbazole. The carbazole ring system is essentially planar (mean atomic deviation = 0.0346 Å) and makes a dihedral angle of 86.5 (7)° with the methyl acetate group. Weak intermolecular C—H⋯O hydrogen bonding is present in the crystal structure
Isolation an Antimicrobial Action of Endophytic Fungi from Sophora Flavescens and Effects on Microorganism Circumstances in Soil
AbstractThe aim of this study was to isolate the endophytic fungi from Sophora flavescens and define its antimicrobial action and structure. The effects of this active substance on soil microorganism circumstances were also conducted. Column chromatography and freeze drying were used to isolate and purify the antimicrobial substance. TLC biological autoradiography was applied to trace. HPLC method was employed to measure the purity. Analysis of the structure used 1H-NMR, 13C-NMR and LC-MS methods. Plate method was applied to measure the effect on microorganism circumstances. The results showed that after isolating and purifying the fermentation liquor of BS001, the structure of bacteriostatic active composition was 6,7-(2′E)dibutenyl-5,8-dihydroxy-(Z)-cyclooct-2-ene-1,4-dione, which was identified by spectroscopy. The substance could increase the number of bacteria and fungi while decreased the number of antinomies in soil. A new antimicrobial substance 6,7-(2′E)dibutenyl-5,8 -dihydroxy- (Z)- cyclooct - 2- ene-1,4-dione was extracted from fermenting liquor of BS001 which was an endophytic fungi of Sophora flavescens. It could promote the beneficial flora but detrimental flora. This conclusion provides exploiture foreground for biopharmaceuticals and biopesticide
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