2,849 research outputs found
Visual Analytics for Regional Economic Environment Factors Based on a Dashboard Design
Abstract. Economic environment is vital for commercial investment, city planning and company strategy planning in urban areas. Mastering the economical trend may help the entrepreneurs, government officers and individuals in their decision-making process. In this study, we explore multiple geo-economic datasets using visual analytics methods for understanding the economic environment. More specifically, we user time-series Gross Domestic Product (GDP) data as an economic indicator of economic development and land use data to support the spatial analysis at a refined geographic scale. The spatiotemporal patterns of the regional economic environment are revealed both qualitatively and quantitatively. The work has a three-fold contributions: (1) we apply a grid-based spatial interpolation model to derive GDP values at a file granularity based on land use data; (2) we design a novel interactive dashboard for the GDP data exploration, which serves as a visual analytical tool between data and users; (3) we combine quantitative analysis with visualizations to strengthen the qualitative analysis. The feasibility of visual analytics methods and the dashboard design are tested in one of the most developed regions, Jiangsu Province, China. Both expected and unexpected economical patterns were extracted.</p
Robust consensus control of uncertain multi-agent systems with input delay: a model reduction method
Mediation analysis with the mediator and outcome missing not at random
Mediation analysis is widely used for investigating direct and indirect
causal pathways through which an effect arises. However, many mediation
analysis studies are often challenged by missingness in the mediator and
outcome. In general, when the mediator and outcome are missing not at random,
the direct and indirect effects are not identifiable without further
assumptions. In this work, we study the identifiability of the direct and
indirect effects under some interpretable missing not at random mechanisms. We
evaluate the performance of statistical inference under those assumptions
through simulation studies and illustrate the proposed methods via the National
Job Corps Study
Molecular states from and interactions
In this work, we preform a systematic investigation about hidden heavy and
doubly heavy molecular states from the
and
interactions in the quasipotential
Bethe-Salpeter equation (qBSE) approach. With the help of Lagrangians with
heavy quark and chiral symmetries, interaction potentials are constructed
within the one-boson-exchange model in which we include the , ,
, and exchanges, as well as or
exchange. Possible bound states from the interactions considered are searched
for as the pole of scattering amplitude. The results suggest that
experimentally observed states, , , , and
, can be related to the , ,
, and interactions with quantum numbers
, respectively. The interaction is also
attractive enough to produce a pole with which is related to the
. Within the same theoretical frame, the existence of and
molecular states with are predicted. The possible
molecular states with and and their
bottom partners are also suggested by the calculation. In the doubly heavy
sector, no bound state is produced from the interaction
while a bound state is found with from
interaction. The interaction produces three
molecular states with , and .Comment: 7 page
Polymer acceptors based on Y6 derivatives for all-polymer solar cells
No abstract availabl
Comparison of the Effectiveness of Pars Plana Vitrectomy with and without Internal Limiting Membrane Peeling for Idiopathic Retinal Membrane Removal: A Meta-Analysis
We conducted a meta-analysis of published retrospective studies and compared the effectiveness of pars plana vitrectomy with and without internal limiting membrane (ILM) peeling for idiopathic epiretinal membrane (IERM). The results revealed that patients in the IERM+ILM peeling group had better BCVA after surgery within 12 months than those in IERM peeling group. But patients in the IERM peeling group showed better BCVA in the 18th month. More retrospective studies or randomized controlled trials are required to investigate and compare the long-term effect of IERM removal with and without ILM peeling
Consensus disturbance rejection for Lipschitz nonlinear multi-agent systems with input delay: a DOBC approach
In this paper, a new predictor-based consensus disturbance rejection method is proposed for high-order multi agent systems with Lipschitz nonlinearity and input delay. First, a distributed disturbance observer for consensus control is developed for each agent to estimate the disturbance under the delay constraint. Based on the conventional predictor feedback approach, a non-ideal predictor based control scheme is constructed for each agent by utilizing the estimate of the disturbance and the prediction of the relative state information. Then, rigorous analysis is carried out to ensure that the extra terms associated with disturbances and nonlinear functions are properly considered. Sufficient conditions for the consensus of the multi-agent systems with disturbance rejection are derived based on the analysis in the framework of Lyapunov-Krasovskii functionals. A simulation example is included to demonstrate the performance of the proposed control scheme. (C) 2016 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.National Natural Science Foundation of China [61673034]SCI(E)ARTICLE1,SI298-31535
- β¦