Categorical FDA Under Prospective Sampling Scheme: a Proposal for Variable Selection

2001 ◽  
pp. 53-60
Author(s):  
Francesco Palumbo
Keyword(s):  
Variable Selection ◽  
Sampling Scheme ◽  
Prospective Sampling

scholarly journals Deciphering Centimeter-Scale Microbial Biogeographic Patterns and Community Assembly Processes From A 3D Perspective

2020 ◽  
Author(s):  
Ran Xue ◽  
Kankan Zhao ◽  
Xiuling Yu ◽  
Erinne Stirling ◽  
Shan Liu ◽  
...  
Keyword(s):  
Microbial Community ◽  
Variable Selection ◽  
Microbial Diversity ◽  
Community Assembly ◽  
Sampling Strategy ◽  
Sampling Scheme ◽  
Ecological Processes ◽  
Soil Matrix ◽  
Biogeographic Patterns ◽  
2D To 3D

Abstract Background: Revealing the effects of multi-dimensional spatial distribution on microorganisms is crucial for the further understanding of microbial diversity, turnover and ecological processes. However, microbial community assembly and the factors that shape it are still unknown from a three dimensional (3D) perspective. Here, a 3D model was created by performing an exhaustive sampling strategy to a 4x4x4 soil matrix. We examined the dynamics of microbial diversity, biogeographic patterns and microbial assembly processes when transfroming sampling scheme from 2D to 3D.Results: Our results indicated that dispersion of microbial community and significance of distance decay relationship was higher in the 3D compared with 2D sampling scheme, suggesting increased microbial turnover when transforming the model from 2D to 3D. Only a small fraction of community variation can be explained by environmental, spatial factors and spatial canonical axes, possibly due to unmeasured environmental variables. The assembly of microbial community was dominated by deterministic processes that shifted from homogeneous selection to variable selection as we transformed the model from 2D to 3D. The importance of stochasticity increased when homogeneous and variable selection processes were well balanced. However, heterogeneity of existing environmental and spatial variables failed to explain the dynamics of community assembly.Conclusions: Our study revealed significant dynamics of microbial diversity and assembly processes when assessed from 2D and 3D perspectives. As microorganisms are spatially distributed in soil, this spatial dependent diversity and assembly suggests that microbial ecological questions need to be considered in more dimensions than they usually are. Further, new models that integrate all data sets are still needed to disengle the microbial processes in multiple dimensions.

Polarity and Variable Selection Heuristics for SAT-Based Anytime MaxSAT

2020 ◽  
Vol 12 (1) ◽  
pp. 17-22
Author(s):  
Alexander Nadel
Keyword(s):  
Variable Selection ◽  
Open Source ◽  
System Description

This paper is a system description of the anytime MaxSAT solver TT-Open-WBO-Inc, which won both of the weighted incomplete tracks of MaxSAT Evaluation 2019. We implemented the recently introduced polarity and variable selection heuristics, TORC and TSB, respectively, in the Open-WBO-Inc-BMO algorithm within the open-source anytime MaxSAT solver Open-WBO-Inc. As a result, the solver is substantially more efficient.

Database-Driven Modeling based on Variable Selection using Random Forest and Its Application for Linear Air Fuel Ratio Sensor Output Prediction

2019 ◽  
Vol 139 (8) ◽  
pp. 850-857
Author(s):  
Hiromu Imaji ◽  
Takuya Kinoshita ◽  
Toru Yamamoto ◽  
Keisuke Ito ◽  
Masahiro Yoshida ◽  
...  
Keyword(s):  
Random Forest ◽  
Variable Selection ◽  
Sensor Output ◽  
Fuel Ratio

Detection of Terahertz Pulsed Radiation by using Heterodyne Electro-Optic Sampling Scheme

2012 ◽  
Vol 132 (9) ◽  
pp. 727-733
Author(s):  
Masahiko Tani ◽  
Michael I. Bakunov ◽  
Kohji Yamamoto ◽  
Kazuki Horita ◽  
Tetsuya Kinoshita ◽  
...  
Keyword(s):  
Sampling Scheme ◽  
Electro Optic
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