Sökning: "Random walk"

Visar resultat 21 - 25 av 64 avhandlingar innehållade orden Random walk.

1. 21. Study on Decentralized Machine Learning and Applications to Wireless Caching Networks

   Författare :Yu Ye; Ming Xiao; Zhu Han; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Distributed multi-task learning; decentralized optimization; ADMM; mobility-aware wireless caching; Distribuerat lärande med flera uppgifter; decentraliserad optimering; ADMM; mobilitetsmedveten trådlös cache; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : To promote the development of distributed machine learning, it is crucial to provide efficient models and training algorithms. This thesis is devoted to the design of distributed multi-task learning and decentralized algorithms, as well as the application of distributed machine learning in wireless caching networks. LÄS MER

3. 22. On Importance Sampling and Dependence Modeling

   Författare :Jens Svensson; Boualem Djehiche; Thomas Mikosch; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; Matematisk statistik;

   Sammanfattning : This thesis consists of four papers. In the first paper, Monte Carlo simulation for tail probabilities of heavy-tailed random walks is considered. Importance sampling algorithms are constructed by using mixtures of the original distribution with some other state-dependent distributions. LÄS MER

4. 23. The theory of Homo comperiens, the firm’s market price, and the implication for a firm’s profitability

   Författare :Joachim Landström; Jan-Erik Gröjer; Dag Smith; Frøystein Gjesdal; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Homo Comperiens; Inefficient Markets; Efficient Markets; Arbitrage; No-Arbitrage; Market Price; Market Value; Intrinsic Value; Residual Income; Residual Earnings; Company Valuation; Firm Valuation; Valuation; Accounting; Financial Accounting; Financial Analysis; Residual Rate-of-Return; Residual Rates-of-Returns; Business studies; Företagsekonomi;

   Sammanfattning : This thesis proposes a theory of inefficient markets that uses limited rational choice as a central trait and I call it the theory of Homo comperiens. The theory limits the alternatives and states that the subjects are aware of and only allow them to have rational preference relations on the limited action set and state set, i.e. LÄS MER

5. 24. Two-Barrier Problems in Applied Probability: Algorithms and Analysis

   Författare :Mats Pihlsgård; Matematisk statistik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; operations research; programming; actuarial mathematics; Statistik; Matematik; Mathematics; Naturvetenskap; Natural science; Reflection; Stochastic processes; Applied probability; Queueing; operationsanalys; programmering; aktuariematematik;

   Sammanfattning : This thesis consists of five papers (A-E). In Paper A, we study transient properties of the queue length process in various queueing settings. We focus on computing the mean and the Laplace transform of the time required for the queue length starting at $x0. We define the loss rate due to the reflection. LÄS MER

7. 25. Influence of Nuclear Structure on Decay Properties of Heavy Nuclei

   Författare :Daniel Ward; Matematisk fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; alpha decay; hindrance factors; Skyrme-Hartree-Fock-Bogoliubov model; superheavy nuclei; fission yields; Brownian-shape motion; nuclear structure; nuclear level density; alpha decay; hindrance factors; Skyrme-Hartree-Fock-Bogoliubov model; superheavy nuclei; fission yields; Brownian-shape motion; nuclear structure; nuclear level density; Fysicumarkivet A:2017:Ward;

   Sammanfattning : This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yielddistributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavynuclei is one of the central topics for investigation. LÄS MER