Search results for "simulointi"
showing 10 items of 148 documents
Detecting cellular network anomalies using the knowledge discovery process
2015
Analytical companies unanimously forecast the exponential growth of mobile traffic consumption over the next five years. The densification of a network structure with small cells is regarded as a key solution to meet growing capacity demands. The manual management of a multi-layer network is a very expensive, error prone, and sluggish process. Hence, the automation of the whole life cycle of network operation is highly anticipated. To this aim 3GPP introduces a self-management concept referred to as SON. It is envisioned that SON updates information concerning the latest network conditions through the MDT mecha- nism. MDT enables a network operator to collect radio and service quality measurem…
Factors affecting simulator-training effectiveness
2002
Atomiklusterin tasapainomuodon Monte Carlo -simulointi
2007
Vierasmolekyylien sitoutumisen mallintaminen lipokaliiniproteiineissa
2008
Tässä työssä tutkittiin DigA16- ja 1KT7-proteiineja. Proteiineille suoritettiin klassisia MD-simulaatioita käyttämällä Orac4.0-ohjelmistoa. DigA16-proteiinin kokeellisesti mitattu rakenne täydennettiin tietokoneella ja kokonaisesta proteiinista simuloitiin kolmea eri rakennetta. 1KT7-proteiinin simulaation lähtörakenteena oli kokeellisesti mitattu rakenne, jota ei tarvinnut täydentää. Simulaatioita suoritettiin kutakin 10,751 nanosekunnin verran, joista 0,751 ns oli alustusta ja 10 ns simulointia 300 Kelvinissä. Tästä 10 ns vaiheesta kerättiin analysoitu data. Simulaation aikana kokonaisenergia kasvoi tasaisesti. Kasvu oli niin pientä, että sen voidaan katsoa johtuneen täysin MD-simulaatios…
Numerical simulation of fluid-structure interaction between acoustic and elastic waves
2011
Estimating aggregated nutrient fluxes in four Finnish rivers via Gaussian state space models
2013
Reliable estimates of the nutrient fluxes carried by rivers from land-based sources to the sea are needed for efficient abatement of marine eutrophication. Although nutrient concentrations in rivers generally display large temporal variation, sampling and analysis for nutrients, unlike flow measurements, are rarely performed on a daily basis. The infrequent data calls for ways to reliably estimate the nutrient concentrations of the missing days. Here, we use the Gaussian state space models with daily water flow as a predictor variable to predict missing nutrient concentrations for four agriculturally impacted Finnish rivers. Via simulation of Gaussian state space models, we are able to esti…
Modelling the evolution of periodicity in the periodical cicadas
2018
Background: Periodical cicadas (Magicicada spp.) have a life cycle that ends with the entire underground nymph population exhibiting a synchronized mass emergence to mate above ground. Previous studies have hypothesized that the periodical cicadas evolved from non-periodical cicadas by switching from a life-cycle length determined by body size to one determined by age. Questions: When can a mutation coding for fixed life-cycle length invade a resident population in which life-cycle length is variable? What determines the length of the fixed cycle? Methods: Numerical analysis of a mathematical model and simulations of an individual-based model. Results: If there is a sufficiently strong pred…
Substituutiojouston estimointi : simulointihavaintoja oletusten vaikutuksista tuloksiin
2016
Tässä työssä tutkitaan substituutiojouston estimointia. Substituutiojousto on tunnuslu-ku, joka kuvaa tuotantopanoksen korvaamisen helppoutta jollakin toisella tuotanto-panoksella. Substituutiojousto voidaan estimoida jonkin tuotantofunktion parametrien avulla. Tässä työssä tarkastellaan lähemmin CES- ja Translog-tuotantofunktioita. Substituutiojousto on määritelty alun perin kahden tuotantopanoksen tuotantofunk-tioille. Määritelmä voidaan kuitenkin yleistää usean tuotantopanoksen tuotantofunkti-oille. Esimerkkejä substituutiojouston yleistyksistä usean tuotantopanoksen tilanteessa ovat Allen-substituutiojousto, Morishima-substituutiojousto ja varjosubstituutiojousto. Sekä substituutiojoust…
Joint Subcarrier and Phase Shifts Optimization for RIS-aided Localization-Communication System
2022
Joint localization and communication systems have drawn significant attention due to their high resource utilization. In this paper, we consider a reconfigurable intelligent surface (RIS)-aided simultaneously localization and communication system. We first determine the sum squared position error bound (SPEB) as the localization accuracy metric for the presented localization-communication system. Then, a joint RIS discrete phase shifts design and subcarrier assignment problem is formulated to minimize the SPEB while guaranteeing each user’s achievable data rate requirement. For the presented non-convex mixed-integer problem, we propose an iterative algorithm to obtain a suboptimal solution …