Results 241 to 250 of about 557,874 (331)

DNA Barcoding Reveals Cryptic Diversity and Informs Conservation Priorities in Chinese Firmiana Species (Malvaceae) Using Genome Skimming Data DNA条形码揭示中国梧桐属 (锦葵科) 隐存多样性及保护优先级:来自基因组浅层测序数据的证据

Integrative Conservation, EarlyView.
Accurate species identification is critical for conserving endangered Firmiana trees in China. However, morphological similarities among closely related Firmiana species complicate its taxonomic identification. We conducted genome skimming on 62 samples representing all 10 Chinese species and discovered nrITS as the optimal DNA barcode, achieving 100 ...
Li‐Jun Yan, Ruo‐Zhu Li, Yun‐Xue Xiao, Richard T. Corlett, Yan Liu, Zhi‐Xiang Yu, Rong‐Sheng Luo, Jing Yang, Wen‐Bin Yu   +8 more
wiley   +1 more source

Metastability and teleconnection of atmospheric circulation via hidden Markov models and network modularity. [PDF]

Sci Rep
Mukhin D, Samoilov R, Hannachi A.
europepmc   +1 more source

A Local Projections Approach to Difference‐in‐Differences

Journal of Applied Econometrics, EarlyView.
ABSTRACT We propose a local projections (LPs)‐based difference‐in‐differences (DiD) approach that subsumes many of the recent solutions proposed in the literature to address possible biases arising from negative weighting. We combine LPs with a flexible “clean control” condition to define appropriate sets of treated and control units.
Arindrajit Dube, Daniele Girardi, Òscar Jordà, Alan M. Taylor   +3 more
wiley   +1 more source

The asymmetry system properties of the visual system: Evidence from serial face processing. [PDF]

J Vis
Yu JM, Ying H.
europepmc   +1 more source

On Stationary Markov Processes

The Annals of Mathematical Statistics, 1967
openaire   +4 more sources

Slow Expectation–Maximization Convergence in Low‐Noise Dynamic Factor Models

Journal of Applied Econometrics, EarlyView.
ABSTRACT This paper addresses the slow convergence of the expectation–maximization (EM) algorithm in the estimation of low‐noise dynamic factor models, commonly used in macroeconomic nowcasting and forecasting. We show analytically and in Monte Carlo simulations how the EM algorithm stagnates in a low‐noise environment, leading to inaccurate estimates ...
Daan Opschoor, Dick van Dijk
wiley   +1 more source

Progress of chronic kidney disease and associated predictors among patients under treatment at Gambi and Felege-Hiwote hospitals. [PDF]

Sci Rep
Demssie ME, Tegegne AS, Workie DL.
europepmc   +1 more source

Steiner Triple Systems With High Discrepancy

Journal of Combinatorial Designs, EarlyView.
ABSTRACT In this paper, we initiate the study of discrepancy questions for combinatorial designs. Specifically, we show that, for every fixed r ≥ 3 $r\ge 3$ and n ≡ 1 , 3 ( mod 6 ) $n\equiv 1,3\,(\mathrm{mod}\,6)$, any r $r$‐colouring of the triples on [ n ] $[n]$ admits a Steiner triple system of order n $n$ with discrepancy Ω ( n 2 ) ${\rm{\Omega }}({
Lior Gishboliner, Stefan Glock, Amedeo Sgueglia   +2 more
wiley   +1 more source

Study on the spatial and temporal evolution characteristics and spatial influencing factors of carbon emission intensity in commercial land. [PDF]

Sci Rep
Tian N, Tan L.
europepmc   +1 more source

THEORY OF TRAFFIC ASSIGNMENT THROUGH ABSORBING MARKOV PROCESS

, 1965
Tsuna Sasaki
openalex   +2 more sources