Results 11 to 20 of about 71,352 (312)

Determination of the structural efficiency of short bridges according to their physical and economic characteristics

open access: yes, 2021
Bridges are structures designed and built to overcome natural and artificial obstacles. The analysis and design of bridges is carried out following principles of physics applied to engineering.
Pineda Rodríguez, J R   +2 more
core   +1 more source

Population perspectives and demographic methods to strengthen CRVS systems: introduction

open access: yesGenus, 2022
Civil registration and vital statistics (CRVS) systems and legal identity systems have become increasingly recognized as catalytic both for inclusive development and for monitoring population dynamics spanning the entire life course.
Romesh Silva
doaj   +1 more source

Spanning trees in random series-parallel graphs

open access: yesAdvances in Applied Mathematics, 2016
By means of analytic techniques we show that the expected number of spanning trees in a connected labelled series-parallel graph on $n$ vertices chosen uniformly at random satisfies an estimate of the form $s \varrho^{-n} (1+o(1))$, where $s$ and $\varrho$ are computable constants, the values of which are approximately $s \approx 0.09063$ and $\varrho^{
Rué Perna, Juan José   +1 more
openaire   +4 more sources

Demand for energy in Zimbabwe industries: an aggregated demand analysis

open access: yesJournal of Energy in Southern Africa, 2017
This paper describes interfuel substitution for liquid fuel, coal and electricity in Zimbabwe manufacturing and mining using a translog cost function. Our data series spans over a 24 year period.
J C Nkomo, H E Goldstein
doaj   +1 more source

S-NER: A Concise and Efficient Span-Based Model for Named Entity Recognition

open access: yesSensors, 2022
Named entity recognition (NER) is a task that seeks to recognize entities in raw texts and is a precondition for a series of downstream NLP tasks.
Jie Yu   +5 more
doaj   +1 more source

Modeling of red blood cell life-spans in hematologically normal populations [PDF]

open access: yes, 2012
Despite the impact of red blood cell (RBC) Life-spans in some disease areas such as diabetes or anemia of chronic kidney disease, there is no consensus on how to quantitatively best describe the process.
Karlsson, Mats O.,   +7 more
core   +1 more source

Fixed and Long Time Span Jump Tests: New Monte Carlo and Empirical Evidence

open access: yesEconometrics, 2019
Numerous tests designed to detect realized jumps over a fixed time span have been proposed and extensively studied in the financial econometrics literature.
Mingmian Cheng, Norman R. Swanson
doaj   +1 more source

Mixed Models as a Tool for Comparing Groups of Time Series in Plant Sciences

open access: yesPlants, 2021
Plants adapt to continual changes in environmental conditions throughout their life spans. High-throughput phenotyping methods have been developed to noninvasively monitor the physiological responses to abiotic/biotic stresses on a scale spanning a long ...
Ioannis Spyroglou   +5 more
doaj   +1 more source

Spatial influence scope of end wall of metro station structures

open access: yesYantu gongcheng xuebao, 2020
The conventional seismic design of metro stations is to select the mid-span section for calculation analysis and design based on plane problem. However, the spatial effect of end walls must be considered because the area close to the front and rear end ...
WANG Guo-bo 1, 2, HAO Peng-fei 1, SUN Fu-xue 2
doaj   +1 more source

Multivariate Time Series Forecasting Based on Multi-Scale Feature Fusion and Dual-Attention Mechanism [PDF]

open access: yesJisuanji gongcheng, 2023
Each subsequence of the Multivariate Time Series(MTS) contains multi-scale characteristics of different time spans, comprising information such as development process, direction, and trend.
Lu HAN, Weigang HUO, Yonghui ZHANG, Tao LIU
doaj   +1 more source

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