402 research outputs found
sj-docx-1-mdm-10.1177_0272989X221097106 – Supplemental material for Trends in Author-Reported Cost-Effectiveness Thresholds in the United States from 1995 to 2018: Implications for Discount Rates
No full textSupplemental material, sj-docx-1-mdm-10.1177_0272989X221097106 for Trends in Author-Reported Cost-Effectiveness Thresholds in the United States from 1995 to 2018: Implications for Discount Rates by Ankur Pandya, Mike Paulden, Jinyi Zhu, Tara A. Lavelle and James Hammitt in Medical Decision Making</p
An accelerated MDM algorithm for SVM training
No full textThis is an electronic version of the paper presented at the 16th European Symposium on Artificial Neural Networks, held in Bruges on 2018In this work we will propose an acceleration procedure for the
Mitchell–Demyanov–Malozemov (MDM) algorithm (a fast geometric algorithm
for SVM construction) that may yield quite large training savings.
While decomposition algorithms such as SVMLight or SMO are usually the
SVM methods of choice, we shall show that there is a relationship between
SMO and MDM that suggests that, at least in their simplest implementations,
they should have similar training speeds. Thus, and although we
will not discuss it here, the proposed MDM acceleration might be used as
a starting point to new ways of accelerating SMO.With partial support of Spain’s TIN 2004–07676 and TIN 2007–66862 projects. The first
author is kindly supported by FPU-MEC grant reference AP2006-02285
Wavelength-interleaved MDM-WDM transmission over weakly-coupled FMF
No full textRecently mode-division-multiplexing (MDM) has been widely investigated to enhance fiber optics capacity, in which modes or mode groups in few-mode fiber (FMF) or multi-mode fiber (MMF) are exploited as different spatial channels for data transmission. For short-reach applications, significantly reducing inter-spatial-channel crosstalk to avoid coherent detection and multiple-input-multiple-output (MIMO) equalization is preferred. Currently most studies focus on the design of weakly-coupled FMFs and mode (de) multiplexers. Alternatively, in this work, a wavelength-interleaved (WI) scheme is proposed to mitigate inter-spatial-channel crosstalk by optimizing the design of direct detection (DD) MDM and wavelength-division-multiplexing (WDM) system. In weaklycoupled MDM systems, crosstalk mainly comes from the adjacent spatial channels, and the signal-to-crosstalk beat interference (SCBI) constitutes main crosstalk impairment after square-law detection. The WI scheme interleaves the WDM grids in adjacent spatial channels by half WDM channel spacing and uses an electrical low-pass filtering (ELPF) to remove out-of-band SCBI. The effectiveness of SCBI suppression is theoretically analyzed. The feasibility of WI scheme is experimentally verified by 3-mode 3-wavelength MDM-WDM transmission over 500-m OM3 MMF. Enabled by WI scheme, record 120-km 10G-per-channel MDM-WDM transmission over 2-mode FMF without MIMO equalization is successfully demonstrated. The WI scheme is promising to enhance the performance of short reach or even metro MDM optics. (C) 2017 Optical Society of America973 Program [2014CB340105, 2014CB340101]; National Natural Science Foundation of China (NSFC) [61377072, 61627814, 61690194, 61505002]SCI(E)ARTICLE1416603-166172
RT-MDM: Real-Time Scheduling Framework for Multi-DNN on MCU Using External Memory
No full textAs the application scope of DNNs executed on microcontroller units (MCUs) extends to time-critical systems, it becomes important to ensure timing guarantees for increasing demand of DNN inferences. To this end, this paper proposes RT-MDM, the first RealTime scheduling framework for Multiple DNN tasks executed on an MCU using external memory. Identifying execution-order dependencies among segmented DNN models and memory requirements for parallel execution subject to the dependencies, we propose (i) a segment-group-based memory management policy that achieves isolated memory usage within a segment group and sharded memory usage across different segment groups, and (ii) an intra-task scheduler specialized for the proposed policy. Implementing RT-MDM on an actual system and optimizing its parameters for DNN segmentation and segment-group mapping, we demonstrate the effectiveness of RT-MDM in accommodating more DNN tasks while providing their timing guarantees. © 2024 Copyright is held by the owner/author(s). Publication rights licensed to ACM
Demonstration of all-optical MDM/WDM switching for short-reach networks
No full textMode division multiplexing (MDM) has been widely investigated in optical transmission systems and networks to improve network capacity. However, the MDM receiver is always expensive and complex because coherent detection and multiplex-input-and-multiplex-output (MIMO) digital signal processing (DSP) are required to demultiplex each spatial mode. In this paper, we investigate the application of MDM in short-reach scenarios such as datacenter networking. Two-dimensional MDM and wavelength division multiplexing node structure based on low modal-crosstalk few-mode fiber (FMF) and components is proposed, in which signal in each mode or wavelength can be independently switched. We experimentally demonstrate independent adding, dropping and switching functionalities with two linearly polarized modes and four wavelength channels over a total 11.8-km 2-mode low modal-crosstalk FMFs. The structure is simple without coherent detection or MIMO DSP. Only slight penalties of receiver sensitivity are observed for all switching operations. The influence of modal-crosstalk accumulation for cascaded switching nodes is also investigated. (C) 2016 Optical Society of AmericaProgram 973 [2014CB340105, 2014CB340101]; National Natural Science Foundation of China (NSFC) [61377072, 61275071, 61505002]SCI(E)[email protected]
General CPT-even dimension-five nonminimal couplings between fermions and photons yielding EDM and MDM
No full textAbstractIn this letter, we examine a new class of CPT-even nonminimal interactions, between fermions and photons, deprived of higher order derivatives, that yields electric dipole moment (EDM) and magnetic dipole moment (MDM) in the context of the Dirac equation. The couplings are dimension-five CPT-even and Lorentz-violating nonminimal structures, composed of a rank-2 tensor, Tμν, the electromagnetic tensor, and gamma matrices, being addressed in its axial and non-axial Hermitian versions, and also comprising general possibilities. We then use the electron's anomalous magnetic dipole moment and electron electric dipole moment measurements to reach upper bounds of 1 part in 1020 and 1025 (eV)−1
A Malthus-Swan-Solow model of economic growth
No full textIn this paper we introduce in the Solow-Swan growth model alabor supply based on Malthusian ideas. We show that this model may yieldseveral steady states and that an increase in total factor productivity mightdecrease the capital-labor ratio in a stable equilibrium.The author acknowledges financial support from grants ECO2014-57442-P, MDM 2014-0431
and S2015/HUM-3444 and the hospitality of INET, Department of Economics, Cambridge University
Sovelluksen käyttöönottoprosessin vaiheet : Case YIS / MDM SC
No full textOpinnäytetyön toimeksiantajana toimii YIT Information Services Oy. Työn case-sovelluksena on MDM SC –sovellus. Työ keskittyy pääasiassa kyseisen sovelluksen ja toimeksiantajan muiden sovellusten käyttöönotto-prosesseihin ja –menetelmiin. Aiheen valinta perustui pitkälti meneillä olleeseen sovelluksen käyttöönottoon.
Opinnäytetyön tavoitteena oli tutkia, millaisia sovelluksen käyttöönottoon tarkoitettuja menetelmiä on yleisesti olemassa. Case-tutkimuksen tarkoituksena oli selvittää YIS:llä käytössä olevat ja MDM SC –projektissa toteutuneet menetelmät.
Opinnäytetyön teoriaosuuden pääpaino on kolmella valitulla käyttöönottomenetelmällä, jotka esitellään työssä vaiheistuksineen. Työn tutkimusmenetelmä pohjautuu sovellusasiantuntijoiden haastatteluihin. Niiden lisäksi tutkimusmenetelmänä on käytetty osallistuvaa havainnointia. Työn aineistona on käytetty alan kirjallisuutta ja luotettavia internet-lähteitä.
Tutkimuksen tuloksena saatiin selville, että YIS:llä on virallisesti käytössä vain yrityksen omiin tarpeisiin muokattu ASAP-menetelmä. Case-sovelluksen käyttöönotossa ei tietoisesti ole käytetty mitään tiettyä menetelmää, mutta lähtökohtaisesti sen vaiheistus pohjautui ASAP-menetelmään. Käytetty prosessimalli muuttui projektin edetessä vastaa-maan enemmän XP-menetelmän vaiheistusta ja toimintatapoja.
Johtopäätöksenä voidaan todeta, että sovelluksen käyttöönottomenetelmä tulee aina valita kyseisen projektin mukaan riippuen käyttöönotettavan sovelluksen koosta ja siitä, kuinka paljon asiakas osallistuu prosessiin. Kehitysehdotuksena YIS:lle suositellaan tutkielmaan liitetyn menetelmäluokitustaulun käyttämistä projektikohtaisesti.The present thesis is commissioned by YIT Information Services Oy. The thesis treats an application called MDM SC as a case-application. The thesis concentrates mainly on the application and besides that it handles other application introduction processes and methods used at YIS. The subject of this thesis was decided to be based on the application introduction which was going on at the time when the doing of this thesis was initiated.
The target of this thesis is to find out what kind of methods of application introduction exist in general. Still the main goal is to research all the introduction methods used in YIS and what kind of methods were actualized in the MDM SC project during the introduction process.
The theory of this thesis is outlined on three different introduction methods. Those methods are introduced with all the phases included. The main research method used in the thesis is the interviews. Experiences of the thesis author are used as a research method as well. The material used in the thesis is mostly gathered from literature of Information Technology and from reliable web sites.
As a result of the thesis it was found out that there is no other introduction method than a YIS-modified ASAP used in YIS as an official method. It was also found out that there were no other methods used in the case-application project. Basically the phases of the process leaned on the YIS ASAP-method, but it was turned to XP-method during the process.
As a conclusion of the thesis it can be mentioned that the method should be chosen based on the project aspect. It depends on the size of the application to be implemented and how much the commissioner of the application is involved in the process. As a development proposal for YIS it is recommended that a method classification attached in the thesis should be used every time when a new introduction project is started
Integrating the flow regime and water quality effects into a niche-based metacommunity dynamics model for river ecosystems
No full textAquatic community dynamics are closely dominated by flow regime and water quality conditions, which are increasingly threatened by dam regulation, water diversion, and nutrition pollution. However, further understanding of the ecological impacts of flow regime and water quality conditions on aquatic multi-population dynamics has rarely been integrated into existing ecological models. To address this issue, a new niche-based metacommunity dynamics model (MDM) is proposed. The MDM aims to simulate the coevolution processes of multiple populations under changing abiotic environments, pioneeringly applied to the mid-lower Han River, China. The quantile regression method was used for the first time to derive ecological niches and competition coefficients of the MDM, which are demonstrated to be reasonable by comparing them with the empirical evidence. Simulation results show that the Nash efficiency coefficients for fish, zooplankton, zoobenthos, and macrophytes are more than 0.64, while the Pearson correlation coefficients for them are no less than 0.71. Overall, the MDM performs effectively in simulating metacommunity dynamics. For all river stations, the average contributions of biological interaction, flow regime effects, and water quality effects to multi-population dynamics are 64%, 21%, and 15%, respectively, suggesting that the population dynamics are dominated by biological interaction. For upstream stations, the fish population is 8%–22% more responsive to flow regime alteration than other populations, while other populations are 9%–26% more responsive to changes in water quality conditions than fish. For downstream stations, flow regime effects on each population account for less than 1% due to more stable hydrological conditions. The innovative contribution of this study lies in proposing a multi-population model to quantify the effects of flow regime and water quality on aquatic community dynamics by incorporating multiple indicators of water quantity, water quality, and biomass. This work has potential for the ecological restoration of rivers at the ecosystem level. This study also highlights the importance of considering threshold and tipping point issues when analyzing the “water quantity-water quality-aquatic ecology” nexus in future works.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Water Resource
Modeling the Cost Reduction of Master Data Management
No full textMuch research has been done on the advantages of Master Data Management (MDM) and the problems that poor MDM may cause. Much is also known about the importance of data quality. However little is known about quantifying and structuring the costs related to MDM. In this thesis the question ”How can the possible reduction of costs for organizations which may result from implementing Master Data Management be modeled?” is investigated. This research presents an extensible meta-model for the costs related to MDM, which provides a method to structure these costs and compare them in different situations (e.g. before and after an MDM project) to calculate the possible cost reduction. In addition to the meta-model, a support tool has been developed, which acts as an operationalization of the meta-model and helps to model, visualize and compare these costs. Together, these provide a powerful set of tools to model the costs related to MDM, visualize the risks of poor MDM and show the importance of proper MDM. The advantage of our research is that the meta-model provides a fixed hierarchy, but gives the user enough modeling freedom to model their specific situations. Furthermore, the support tool provides an easy to use user interface to model and compare the costs and visualize the risks of poor MDM to an organization, which might convince them to start an MDM project to improve their master data quality (MDQ). Additionally, the support tool uses the extensible meta-model and is therefore powerful enough to model processes in detail as well. This means that the tool could not only be used to quickly show the costs and risks of poor MDM, but could also be used to thoroughly analyze the MDM situation within an organization.Information ArchitectureComputer ScienceElectrical Engineering, Mathematics and Computer Scienc
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