27,994 research outputs found
A Survey on Multisensor Fusion and Consensus Filtering for Sensor Networks
Multisensor fusion and consensus filtering are two fascinating subjects in the research of sensor networks. In this survey, we will cover both classic results and recent advances developed in these two topics. First, we recall some important results in the development ofmultisensor fusion technology. Particularly, we pay great attention to the fusion with unknown correlations, which ubiquitously exist in most of distributed filtering problems. Next, we give a systematic review on several widely used consensus filtering approaches. Furthermore, some latest progress on multisensor fusion and consensus filtering is also presented. Finally,
conclusions are drawn and several potential future research directions are outlined.the Royal Society of the UK, the National Natural Science Foundation of China under Grants 61329301, 61374039, 61304010, 11301118, and 61573246, the Hujiang Foundation of China under Grants C14002
and D15009, the Alexander von Humboldt Foundation of Germany, and the Innovation Fund Project for Graduate Student of Shanghai under Grant JWCXSL140
Scaling of Anisotropic Flows and Nuclear Equation of State in Intermediate Energy Heavy Ion Collisions
Elliptic flow () and hexadecupole flow () of light clusters have
been studied in details for 25 MeV/nucleon Kr + Sn at large
impact parameters by Quantum Molecular Dynamics model with different potential
parameters. Four parameter sets which include soft or hard equation of state
(EOS) with/without symmetry energy term are used. Both number-of-nucleon ()
scaling of the elliptic flow versus transverse momentum () and the scaling
of versus have been demonstrated for the light clusters
in all above calculation conditions. It was also found that the ratio of
keeps a constant of 1/2 which is independent of for all the
light fragments. By comparisons among different combinations of EOS and
symmetry potential term, the results show that the above scaling behaviors are
solid which do not depend the details of potential, while the strength of flows
is sensitive to EOS and symmetry potential term.Comment: 5 pages, 5 figure
77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2
We present a 77Se NMR study of the newly discovered iron selenide
superconductor KyFe2-xSe2, in which Tc = 32 K. Below Tc, the Knight shift 77K
drops sharply with temperature, providing strong evidence for singlet pairing.
Above Tc, Korringa-type relaxation indicates Fermi-liquid behavior. Our
experimental results set strict constraints on the nature of possible theories
for the mechanism of high-Tc superconductivity in this iron selenide system.Comment: Chemical composition of crystals determined. Accepted in Physical
Review Letter
Can citrus farmers earn more from selling online?
Online sales are essential for linking smallholder farmers to a wide range of markets. In essence, online sales not only influence the income received from selling a specific product but also generate spillover effects on total farm income and household income because they promote the sales of other agricultural products and generate regional off-farm work opportunities (e.g. product sorting, packaging, and delivery). Taking citrus as an example, this study explores the income effects of online sales with a focus on net returns from citrus production, net farm income, and household income. We used an endogenous treatment regression model to address the self-selection bias issues of online sales and estimated data collected from 926 citrus-producing households in Jiangxi Province, China. The results show that online citrus sales boost income growth in rural China. Specifically, online sales significantly increased net returns from citrus production, net farm income, and household income by 5,000 Yuan/capita, 8,580 Yuan/capita, and 17,830 Yuan/capita, respectively. The income-enhancing effects of online sales are greater for female household heads than they are for their male counterparts. Our findings emphasise the importance of promoting online sales to improve rural household welfare
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