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dspace.mit.edu 檢索結果共 84617 筆,本頁資料從第 157 筆到第 168 筆

What can we tell about exoplanet habitability if currently only the stellar properties, planet radius, and the incoming stellar flux are known? A planet is in the habitable zone (HZ) if it harbors liquid water on its surface. The HZ is traditionally conceived as a sharp region around stars because it is calculated for one planet with specific properties. Such an approac....

By Andras Zsom--IOP Publishing--2016-01-07
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The decay B[superscript 0] → ψ(2S)K[superscript +]π[superscript -] is analyzed using 3  fb[superscript -1] of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ mass spectrum and angular distribution derived directly from data, without requiring a theoretical descr....

By R. Aaij,B. Adeva,M. Adinolfi,A. Affolder,Z. Ajaltouni,J. Albrecht,F. Al--American Physical Society--2016-01-07
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We present a multiscale thermalization algorithm for lattice gauge theory, which enables efficient parallel generation of uncorrelated gauge field configurations. The algorithm combines standard Monte Carlo techniques with ideas drawn from real space renormalization group and multigrid methods. We demonstrate the viability of the algorithm for pure Yang-Mills gauge the....

By Michael G. Endres,Richard C. Brower,William Detmold,Kostas Orginos,Andrew Pochinsky--American Physical Society--2016-01-07
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Linear and nonlinear vibration energy harvesting has been the focus of considerable research in recent years. However, fundamental limits on the harvestable energy of a harvester subjected to an arbitrary excitation force and different constraints is not yet fully understood. Understanding these limits is not only essential for an assessment of the technology potential,....

By Ashkan Haji Hosseinloo,Konstantin Turitsyn--American Physical Society--2016-01-07
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Nanostructured materials exhibit low thermal conductivity because of the additional scattering due to phonon-boundary interactions. As these interactions are highly sensitive to the mean free path (MFP) of phonons, MFP distributions in nanostructures can be dramatically distorted relative to bulk. Here we calculate the MFP distribution in periodic nanoporous Si for diff....

By Giuseppe Romano,Keivan Esfarjani,David Broido,Alexie M. Kolpak,David Strubbe--American Physical Society--2016-01-07
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Functional MRI studies have uncovered a number of brain areas that demonstrate highly specific functional patterns. In the case of visual object recognition, small, focal regions have been characterized with selectivity for visual categories such as human faces. In this paper, we develop an algorithm that automatically learns patterns of functional specificity from fMRI....

By Danial Lashkari,Ramesh Sridharan,Edward Vul,Po-Jang Hsieh,Nancy Kanwisher,Polina Golland--Elsevier--2016-01-06
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High liquid entry pressure (LEP) is one of the desired characteristics of a membrane distillation (MD) membrane. Maintaining LEP above operating feed pressure conditions is critical to prevent permeate quality worsening by saline feed liquid passage through the membrane. Air gap membrane distillation experiments under controlled salinity and temperature operating condit....

By Kishor Govind Nayar,Jaichander Swaminathan,Divya Panchanathan,David Elan Martin Warsinger,G McKinley--International Desalination Association--2016-01-06
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With advancements in sensor technologies, intelligent transportation systems can collect traffic data with high spatial and temporal resolution. However, the size of the networks combined with the huge volume of the data puts serious constraints on system resources. Low-dimensional models can help ease these constraints by providing compressed representations for the ne....

By Muhammad Tayyab Asif,Kannan Srinivasan,Nikola Mitrovic,Justin Dauwels,Patrick Jaillet--Institute of Electrical and Electronics Engineers (IEEE)--2016-01-06
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Advanced sensing and surveillance technologies often collect traffic information with high temporal and spatial resolutions. The volume of the collected data severely limits the scalability of online traffic operations. To overcome this issue, we propose a low-dimensional network representation where only a subset of road segments is explicitly monitored. Traffic inform....

By Nikola Mitrovic,Muhammad Tayyab Asif,Justin Dauwels,Patrick Jaillet--Institute of Electrical and Electronics Engineers (IEEE)--2016-01-06
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Multiagent planning under uncertainty has seen important progress in recent years. Two techniques, in particular, have substantially advanced efficiency and scalability of planning. Multiagent heuristic search gains traction by pruning large portions of the joint policy space deemed suboptimal by heuristic bounds. Alternatively, influence-based abstraction reformulates ....

By Stefan J. Witwicki,Frans A. Oliehoek,Leslie P. Kaelbling--Association for Computing Machinery (ACM)--2016-01-06
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We consider the problem of constructing a symbolic description of a continuous, low-level environment for use in planning. We show that symbols that can represent the preconditions and effects of an agent's actions are both necessary and sufficient for high-level planning. This eliminates the symbol design problem when a representation must be constructed in advance, an....

By George D. Konidaris,Leslie P. Kaelbling,Tomas Lozano-Perez--Association for the Advancement of Artificial Intelligence (AAAI)--2016-01-06
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Decentralized partially observable Markov decision processes (Dec-POMDPs) are general models for decentralized decision making under uncertainty. However, they typically model a problem at a low level of granularity, where each agent's actions are primitive operations lasting exactly one time step. We address the case where each agent has macro-actions: temporally exten....

By Christopher Amato,George D. Konidaris,Leslie P. Kaelbling--Association for Computing Machinery (ACM)--2016-01-06
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