250 research outputs found
How and what kind of cities benefit from the development of digital inclusive finance? Evidence from the upgrading of export in Chinese cities
Employing Chinese customs data and the Peking University
Digital Financial Inclusion Index of China, this paper studies the
impact of China’s digital finance development on the upgrading
of export at the city level and further explores the heterogeneity
across cities and the mechanisms through which digital finance
influences export upgrading. Benchmark results suggest that
digital inclusive finance can significantly promote the upgrading
of export. The heterogeneity analysis shows that cities with a
smaller size, lower wage, higher human capital level, and better
location advantage experience greater facilitating effects of digital
inclusive finance on promoting export upgrading. It suggests that,
compared with ‘icing on the cake’, the digital inclusive finance
plays a better role in ‘offering fuel in snowy weather’, whereas
full exertion of the inclusiveness of digital finance requires higher
human capital and location advantage. Further mechanism analysis shows that innovation effect and market effect are the main
channels where digital inclusive finance promotes the upgrading
of a city’s export
Spin Squeezing through Collective Spin-Spin Interactions
Spin squeezing provides crucial quantum resource for quantum metrology and
quantum information science. Here we propose that one axis-twisted (OAT) spin
squeezing can be generated from free evolution under a general coupled-spin
model with collective spin-spin interactions. We further propose pulse schemes
to recover squeezing from parameter imperfections, and reach the extreme
squeezing with Heisenberg-limited measurement precision scaling as for
particles. This work provides a feasible method for generating extreme spin
squeezing
catena-Poly[[bis(1H-benzimidazole-κN 3)palladium(II)]-μ-benzene-1,4-dicarboxylato-κ2 O 1:O 4]
In the title compound, [Pd(C8H4O4)(C7H6N2)2]n, the Pd atom is tetracoordinated by two carboxylate O atoms from two benzene-1,4-dicarboxylate (bdc) dianions and two N atoms from two benzimidazole ligands, resulting in a slightly distorted tetrahedral PdO2N2 geometry. The bdc ligand acts as a bridge, linking the Pd atoms into a chain. Inter-chain N—H⋯O hydrogen bonds help to stabilize the crystal structure
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Discussion On Device Structures And Hermetic Encapsulation For SiOx Random Access Memory Operation In Air
An edge-free structure and hermetic encapsulation technique are presented that enable SiOx-based resistive random-access memory (RRAM) operation in air. A controlled etch study indicates that the switching filament is close to the SiOx surface in devices with an exposed SiOx edge. Electrical test of encapsulated, edge-free devices in 1 atmosphere air indicates stable switching characteristics, unlike devices with an edge. This work demonstrates that SiOx RRAM is able to operate in air with proper encapsulation and an edge-free structure. The resistive switching failure mechanism when operating in air is explained by the oxidation of hydrogen-complexed defects in the switching filament. (C) 2014 AIP Publishing LLC.National Science Foundation IIP-1127537Microelectronics Research Cente
MicroRNA-33b inhibits liver cancer cell proliferation, migration and invasion via down-regulation of Fli-1 and MMP-2 protein expressions
Purpose: To study the influence of microRNA-33b (miR-33b) on liver cancer cell proliferation, migration and invasiveness, and the mechanism involved. Methods: MicroRNA-33b or Fli-1 overexpression plasmid was transfected into liver cancer (SMMC7721) cells. Cell proliferation, migration, and invasiveness were determined using cell counting kit 8 (CCK-8), scratch test, and Transwell invasion assay, respectively. The amounts of miR-33b and Fli-1 in liver cancer tissues, paracancerous normal tissues, and miR-33b overexpression and control groups were measured using qRT-PCR, while protein concentration of matrix metalloproteinase 2 (MMP-2) was assayed using Western blotting. Results: Fli-1 protein was markedly upregulated in liver cancerous cells, relative to paracancerous normal tissues (p < 0.05). MicroRNA-33b protein expression was also significantly upregulated in miR33b overexpression group, but the corresponding Fli-1 expression was downregulated in miR-33b overexpression group, relative to control (p < 0.05). MicroRNA-33b overexpression significantly and time-dependently inhibited SMMC7721 cell proliferation and migration, but it reduced the degree of apoptosis (p < 0.05). Liver cancer (SMMC7721) cells in miR-33b overexpression group were less invasive than the control group (p < 0.05). Similarly, miR-33b overexpression significantly downregulated MMP-2 protein expression in SMMC7721cells (p < 0.05). Conclusion: Overexpression of miR-33b suppresses the proliferation, migratory and invasive potential of hepatic cancer cells via down-regulation of Fli-1 and MMP-2 protein expression. This finding may be useful in the identification of new liver cancer drugs
μ-Oxido-bis({4,4′-dibromo-2,2′-ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}iron(III))
In the title compound, [Fe2(C16H12Br2N2O2)2O], the complete molecule is generated by twofold symmetry, with the bridging O atom, which links the iron centres, lying on the roatation rotation axis. The Fe(III) ion is chelated by the N,N,O,O-tetradentate Schiff base dianion, resulting in an FeN2O3 square-based pyramid, with the two N atoms in the basal plane
μ-Oxido-bis{chlorido[tris(2-pyridylmethyl)amine]manganese(III)} bis(hexafluoridophosphate)
In the title compound, [Mn2O(C18H18ClN4)2](PF6)2, the Mn atom is chelated by a tetradentate ligand via four N atoms, and further bonded to one chloride ion and one bridging oxide, to give a centrosymmetric cation and distorted octahedral coordination geometry
Dynamic Analysis of a Predator-Prey (Pest) Model with Disease in Prey and Involving an Impulsive Control Strategy
The dynamic behaviors of a predator-prey (pest) model with disease in prey and involving an impulsive control strategy to release infected prey at fixed times are investigated for the purpose of integrated pest management. Mathematical theoretical works have been pursuing the investigation of the local asymptotical stability and global attractivity for the semitrivial periodic solution and population persistent, which depicts the threshold expression of some critical parameters for carrying out integrated pest management. Numerical analysis indicates that the impulsive control strategy has a strong effect on the dynamical complexity and population persistent using bifurcation diagrams and power spectra diagrams. These results show that if the release amount of infective prey can satisfy some critical conditions, then all biological populations will coexist. All these results are expected to be of use in the study of the dynamic complexity of ecosystems
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