Search results for "LMA"

Adaptive Metropolis algorithm using variational Bayesian adaptive Kalman filter

2013

Markov chain Monte Carlo (MCMC) methods are powerful computational tools for analysis of complex statistical problems. However, their computational efficiency is highly dependent on the chosen proposal distribution, which is generally difficult to find. One way to solve this problem is to use adaptive MCMC algorithms which automatically tune the statistics of a proposal distribution during the MCMC run. A new adaptive MCMC algorithm, called the variational Bayesian adaptive Metropolis (VBAM) algorithm, is developed. The VBAM algorithm updates the proposal covariance matrix using the variational Bayesian adaptive Kalman filter (VB-AKF). A strong law of large numbers for the VBAM algorithm is…

Bioclimatic atlas of the terrestrial Arctic

2023

AbstractThe Arctic is the region on Earth that is warming at the fastest rate. In addition to rising means of temperature-related variables, Arctic ecosystems are affected by increasingly frequent extreme weather events causing disturbance to Arctic ecosystems. Here, we introduce a new dataset of bioclimatic indices relevant for investigating the changes of Arctic terrestrial ecosystems. The dataset, called ARCLIM, consists of several climate and event-type indices for the northern high-latitude land areas > 45°N. The indices are calculated from the hourly ERA5-Land reanalysis data for 1950–2021 in a spatial grid of 0.1 degree (~9 km) resolution. The indices are provided in three subsets…

Gli strumenti urbanistici e i piani energetici

2014

Il capitolo effettua un'analisi degli strumenti urbanistici e dei piani energetici della città di Stoccolma. L'analisi è incentrata sul piano denominato " The Walkable city", approvato già nel 2010. L'integrazione delle varie strumentazione alle varie scale sembra essere la carta vincente giocata dalla città di Stoccolma (che ambisce ad essere una città libera dai combustibili fossili nel 2050). Il City Plan è anche un documento strategico chiave per mettere in luce le strategie dello sviluppo sostenibile per fare diventare Stoccolma una città competitiva nella Vision 2030.

Città europee e piani e progetti sostenibili: il piano "The Walkable city"

2012

The paper proposes a reading and a detailed analysis of the new plan of Stockholm (2010) that looks like a plan for sustainable growth. The title of the plan - The Walkable City - hints at some of the strategic choices made in the field to make a city creative, competitive and attractive, based on an efficient public transport system and a large number of urban roads and pedestrian paths, that revitalize marginal routes and better connect residential areas and suburbs. The city of Stockholm has long had started - the previous plan dates back to 1999 - a series of actions and strategies designed to create an urban system more integrated and better connected. The strategies implemented by the…

Les limites de la “rhétorique” de Perelman de point de vue réthorique-pragmatique

2013

Analisi storico-filosofica delle origini e dei limiti della "retorica" di Perelman Historical-philosophical survey upon origins and limits of Perelman's rhetoric

Alma Mater: 2011/Vasara

2011

Latvijas Universitātes izdevums, kas veltīts LU aktualitātēm studijās, zinātnē, pētniecībā, kultūrā, jaunradē u.c.

Mini-drones swarms and their potential in conflict situations

2021

Drones are currently used for a wide range of operations, such as border surveillance, general surveillance, reconnaissance, transport, aerial photography, traffic control, earth observation, communications, broadcasting, and armed attacks. This paper examines the swarming and associated abilities to overwhelm a combatant as well as bring extra functionality by means of extra sensors spread throughout the swarm. The strategy of stealth is becoming increasingly less effective. Combatants can not only sense them, but can also successfully destroy them (although this cannot be said for nano-drones). For mini-drones, objectives can be enhanced by the strategy of overwhelming. peerReviewed

Kirjoitettujen ja puhuttujen leivontaohjeiden rekisterit ja tekstilajit : esimerkkinä Sikke Sumarin reseptit

2014

Plant trait‐environment relationships in tundra are consistent across spatial scales

2023

Patterns and processes shaping ecosystems vary across spatiotemporal scales. As plant functional traits reflect ecosystem properties, investigating their relationships with environment provides an important tool to understand and predict ecosystem structure and functioning. This is particularly important in the tundra where a changing climate may trigger severe alterations in plant communities as both summer and winter conditions are changing. Here, we investigate the relationships between key environmental drivers including summer temperature, snow persistence, topographic position and soil pH, and species height, specific leaf area (SLA) and seed mass as plant traits. The study is carried…

Supercapacitor diagnosis using an Extended Kalman Filtering approach

2016

This paper deals with the model-based analysis of a Supercapacitor for diagnostic purposes. A two legs nonlinear physical model is assumed for the Supercapacitor and the corresponding second-order nonlinear state-space mathematical model is obtained. Then, an Extended Kalman Filter is tuned so that the estimated outputs reproduce the voltages at the equivalent capacitance terminals; they give information on the state of health of the supercapacitor but are not directly measurable. In particular, an optimization problem is firstly formulated, involving the experimental input-output data and those given by the Extended Kalman Filter.