the Group-Lasso method for finding important explanatory factors suffers from the potential non-uniqueness of solutions and also from high computational costs. We formulate conditions for the uniqueness of Group-Lasso...
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ISBN:
(纸本)9781605582054
the Group-Lasso method for finding important explanatory factors suffers from the potential non-uniqueness of solutions and also from high computational costs. We formulate conditions for the uniqueness of Group-Lasso solutions which lead to an easily implementable test procedure that allows us to identify all potentially active groups. these results are used to derive an efficient algorithm that can deal with input dimensions in the millions and can approximate the solution path efficiently. the derived methods are applied to large-scale learning problems where they exhibit excellent performance and where the testing procedure helps to avoid misinterpretations of the solutions. Copyright 2008 by the author(s)/owner(s).
Model interpretation is one of the key aspects of the model evaluation process. the explanation of the relationship between model variables and outputs is easy for statistical models, such as linear regressions, thank...
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Sensor webs consist of a large collection of small nodes providing collaborative and distributed sensing ability in unpredictable environments. Nodes composing such sensor webs, are characterized by their resource res...
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ISBN:
(纸本)9781605580463
Sensor webs consist of a large collection of small nodes providing collaborative and distributed sensing ability in unpredictable environments. Nodes composing such sensor webs, are characterized by their resource restrictions, especially the energy, the processing, and the communication capacities. these nodes are also in constant interaction with each other and withtheir geographic environment. An efficient system aiming at managing sensor webs must take into account the evolution of the sensor nodes as well as the geographic environment. Such a management process involves coping with a variety of dynamic variables including the nodes characteristics, the environment properties as well as the sensed data. In this context, Multi-Agent Geo-Simulation (MAGS) provides a flexible approach that can be used to easily analyse complex systems such as sensor webs in large scale georeferenced environments. the purpose of this paper is to present SensorMAGS, an agent-based geo-simulation system which manages sensor nodes in virtual geographic environments. this system is applied in the context of a water resource monitoring project. Copyright 2008 ACM.
the widespread of fake news on social media has resulted with serious real-world impacts, mounting concerns among the global net users in the last few years. this has also drawn interest from researchers around the gl...
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India has always been victim of power failures or blackouts and the recent July 2012 countrywide blackout is a perfect example for it. It is expected that due to the widening gap between supply and demand, such instan...
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ISBN:
(纸本)97800791855515
India has always been victim of power failures or blackouts and the recent July 2012 countrywide blackout is a perfect example for it. It is expected that due to the widening gap between supply and demand, such instances of power failure would occur more regularly in future. Such blackouts are also be foreseen in other parts of the world. the electricity grids in many countries are highly centralized and are mostly dependent on fossil-fuel based energy sources (coal, oil, natural gas etc). Due to the rapid rise in the living standards of developing countries such as India and China, there is an increase in demand for electricity for running various appliances, as well as for heating and air-conditioning equipment. Such an increased in demand places tremendous strain on ailing centralized grid burning fossil fuel. the use of renewable energy sources (such as solar and wind) could potentially allow large amount of demand to be met though alternative means and offset the demand on the grid. the advancement in technology has encouraged the implementation of renewable resources especially solar and wind. Hybrid power systems (HPS) that consist of these resources can significantly lower storage requirements. Furthermore, besides being cost-efficient, it is coherent to the weather conditions since solar and wind complement each other well. For highly efficient hybrid power systems to be developed, a significant degree of research must be applied to further their development. this includes tasks such as modeling these systems and applying proficient control algorithms to maximize efficiency. this paper focuses on simulation of an HPS consisting of a photovoltaic (PV) module, wind turbine (WT), and a lead acid battery through MATLAB/SIMULINK software. Moreover, a control algorithm is proposed, which leads to an efficient and autonomous operation of the HPS, along with maximizing power output from PV module and WT. the model and control system were tested using sample hourly
this book highlights leading-edge research in multi-disciplinary areas in Physics, Engineering, Medicine, and Health care, from the 6th IRC conference on Science, Engineering and Technology (IRC-SET 2020) held in July...
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ISBN:
(数字)9789811594724
ISBN:
(纸本)9789811594717;9789811594748
this book highlights leading-edge research in multi-disciplinary areas in Physics, Engineering, Medicine, and Health care, from the 6th IRC conference on Science, Engineering and Technology (IRC-SET 2020) held in July 2020 at Singapore. the papers were shortlisted after extensive rounds of reviews by a panel of esteemed individuals who are pioneers in their domains. the book also contains excerpts of the speeches by eminent personalities who graced the occasion, thereby providing written documentation of the event.
the high millimeter-Wave and Terahertz spectrum above 100 GHz will form the underpinning of a broad set of game-changing future technology including high resolution sensing, imaging, robotics, autonomous systems, and ...
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ISBN:
(纸本)9781450380836
the high millimeter-Wave and Terahertz spectrum above 100 GHz will form the underpinning of a broad set of game-changing future technology including high resolution sensing, imaging, robotics, autonomous systems, and wireless communication. In the last decade, we have seen a tremendous surge in efforts towards enabling chip-scale technology to address signal generation and detection in the thz spectrum. However, there lie several fundamental challenges to translate these efforts into versatile technology that can operate in complex environments that requires properties such as dynamic reconfigurability and rapid adaptability. In this paper, we highlight a new design space that emerges by eliminating the classical block-by-bock design approach. the fundamental principle behind this approach is that the unique wavelength scale at thz (of the order of millimeter/sub-millimeter) is comparable to a typical chip dimension. this wavelength/chip dimension equivalence allows the chip to operate in a new electromagnetic (EM) regime with novel scattering and radiating properties, while the integrated active devices have the ability to actively synthesize, manipulate and sense thz EM fields at sub-wavelength scales. this approach opens up the a new design space that can break many of the trade-offs in the classical design regime. In this paper, we provide design examples that aims towards the ultimate programmable thz sensor/source in silicon-based chips that range from fully integrated chip-scale thz spectroscopes to programmable thz sensors, sources and spatio-temporal modulated arrays for physical layer security. these design examples serve to illustrate the unique opportunities enabled through such a holistic design approach.
the current design of Mobile IPv4 and Mobile IPv6 protocols doesn't provide the compatibility between networks of different versions. A Network Mobility(NEMO) protocol also provides the limited mobility in IPv6 ne...
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ISBN:
(纸本)3540343814
the current design of Mobile IPv4 and Mobile IPv6 protocols doesn't provide the compatibility between networks of different versions. A Network Mobility(NEMO) protocol also provides the limited mobility in IPv6 networks. However, we can easily expect that the current IPv4 network will coexist with IPv6 network in the near future internet environment. So, in this paper, we propose the architecture of mobility between networks of different versions which is supported the NEMO basic protocol. this new mechanism can manage the mobility through a Tunnel Agent(TA). And the TA maintains a NEMO tunnel when a Mobile Router(MR) moves from IPv6 to IPv4 network.
Today, advances in hardware and storage techniques demand for automatically data mining on data streams. Clustering analysis is an importance tool on data streams mining. though density-based clustering algorithms on ...
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the proceedings contain 26 papers. the special focus in this conference is on Computer Scientists. the topics include: Methods for generating deterministic fractals and image compression;constructive matching — Expla...
ISBN:
(纸本)9783540534143
the proceedings contain 26 papers. the special focus in this conference is on Computer Scientists. the topics include: Methods for generating deterministic fractals and image compression;constructive matching — Explanation based methodology for inductive theorem proving;characterizing complexity classes by higher type: Primitive recursive definitions, part ii;the distributed termination problem : Formal solution and correctness based on petri nets;greedy compression systems;a div(N) depth boolean circuit for smooth modular inverse;learning by conjugate gradients;monoids described by pushdown automata;optimal parallel 3-colouring algorithm for rooted trees and its application;hierarchies over the context-free languages;a hierarchy of unary primitive recursive string-functions;optimum simulation of meshes by small hypercubes;minimizing picture words;remarks on the frequency-coded neural nets complexity;picture generation using matrix systems;representing heuristic-relevant information for an automated theorem prover;a new method for proving lower bounds in the model of algebraic decision trees;area time squared and area complexity of VLSI computations is strongly unclosed under union and intersection;decision procedure for checking validity of PAL formulas;seven hard problems in symbolic background knowledge acquisition;subsequential functions: Characterizations, minimization, examples;past proves more invariance properties but not Pca’s;complexity issues in discrete neurocomputing;two-way reading on words;proofs and reachability problem for ground rewrite systems;problems complete for ⊕l.
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