The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Igor Nikiforov - One of the best experts on this subject based on the ideXlab platform.
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anomaly detection detectability for a linear model with a bounded Nuisance parameter
Annual Reviews in Control, 2014Co-Authors: Fouzi Harrou, Lionel Fillatre, Igor NikiforovAbstract:Abstract Anomaly detection is addressed within a statistical framework. Often the statistical model is composed of two types of parameters: the informative parameters and the Nuisance ones. The Nuisance parameters are of no interest for detection but they are necessary to complete the model. In the case of unknown, non-random and non-bounded Nuisance parameters, their elimination is unavoidable. Some approaches based on the assumption that the Nuisance parameters belonging to a subspace interfere with the informative ones in a linear manner, use the theory of invariance to reject the Nuisance. Unfortunately, this can lead to a serious degradation of the detector capacity because some anomalies are masked by Nuisance parameters. Nevertheless, in many cases the physical nature of Nuisance parameters is (partially) known, and this a priori knowledge permits to define lower and upper bounds for the Nuisance parameters. The goal of this paper is to study the statistical performances of the constrained generalized likelihood ratio test used to detect an additive anomaly in the case of bounded Nuisance parameters. An example of the integrity monitoring of GNSS train positioning illustrates the relevance of the proposed method.
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Anomaly detection/detectability for a linear model with a bounded Nuisance parameter
Annual Reviews in Control, 2014Co-Authors: Fouzi Harrou, Lionel Fillatre, Igor NikiforovAbstract:Abstract Anomaly detection is addressed within a statistical framework. Often the statistical model is composed of two types of parameters: the informative parameters and the Nuisance ones. The Nuisance parameters are of no interest for detection but they are necessary to complete the model. In the case of unknown, non-random and non-bounded Nuisance parameters, their elimination is unavoidable. Some approaches based on the assumption that the Nuisance parameters belonging to a subspace interfere with the informative ones in a linear manner, use the theory of invariance to reject the Nuisance. Unfortunately, this can lead to a serious degradation of the detector capacity because some anomalies are masked by Nuisance parameters. Nevertheless, in many cases the physical nature of Nuisance parameters is (partially) known, and this a priori knowledge permits to define lower and upper bounds for the Nuisance parameters. The goal of this paper is to study the statistical performances of the constrained generalized likelihood ratio test used to detect an additive anomaly in the case of bounded Nuisance parameters. An example of the integrity monitoring of GNSS train positioning illustrates the relevance of the proposed method.
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Optimal statistical fault detection with Nuisance parameters
Automatica, 2005Co-Authors: Mitra Fouladirad, Igor NikiforovAbstract:Fault detection is addressed within a statistical framework. The goal of this paper is to propose an optimal statistical tool to detect a fault in a linear stochastic (dynamical) system with uncertainties (Nuisance parameters or Nuisance faults). It is supposed that the Nuisance parameters are unknown but non-random; practically, this means that the Nuisance can be intentionally chosen to maximize its negative impact on the monitored system (for instance, to mask a fault). Examples of ground station based and receiver autonomous Global Positioning System (GPS) integrity monitoring illustrate the proposed method.
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Statistical fault detection in a certain class of nonlinear systems with Nuisance parameters
2003Co-Authors: Hervé Lacresse, Antoine Grall, Igor NikiforovAbstract:Fault detection is addressed within statistical framework in a certain class of nonlinear systems with Nuisance parameters. The corresponding inference problem is stated. Particular emphasis is put on leading with Nuisance parameters by using a linearization of the nonlinear mapping of the Nuisance parameter into the observation vector.
Schremmer, Joseph A. - One of the best experts on this subject based on the ideXlab platform.
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Getting Past Possession: Subsurface Property Disputes as Nuisances
UNM Digital Repository, 2020Co-Authors: Schremmer, Joseph A.Abstract:Property rights in the subsurface of land are adapting to accommodate modern activities like massive hydraulic fracturing (fracing). Property rights will need to continue adapting if they are to accommodate other developing activities like large-scale carbon capture and storage (CCS). Courts and commentators rarely approach the nature of subsurface property directly. They tend instead to discuss appropriate standards for tort liability when disputes arise—for example when artificial fissures from a frac treatment extend into and drain oil or gas from a neighbor’s land. The case law and literature generally approach unauthorized subterranean invasions as trespasses. Because the tort of trespass is designed to protect possession, its application indicates a view of subsurface property as possessory (or corporeal) in nature. Despite calling subsurface invasions “trespasses,” courts rarely impose liability for, or enjoin, invasions themselves. They instead find liability only for interferences with existing or foreseeable uses of the affected land. Leading scholars likewise advocate for a standard of subsurface “trespass” that would privilege encroachments that are societally valuable and award compensation only for resulting harm to existing uses of the property. The cases and literature thus nominally apply trespass but modify the tort from a property rule into a liability rule resembling the tort of Nuisance. This article is the first to examine unauthorized subsurface encroachments as Nuisances, rather than trespasses, and to assert that such encroachments do not implicate possession. Drawing on geology, doctrine, and property theory, this article interrogates the assumption that subsurface property is possessory. It analyzes prominent subsurface “trespass” cases involving waste disposal, enhanced oil recovery, fracing, natural gas storage, slant-hole wells, tunneling, and horizontal drilling to demonstrate that these disputes are already being resolved under Nuisance-like principles. It argues that express application of Nuisance law is doctrinally correct and would improve courts’ reasoning, harmonize disparate results, and efficiently allocate costs of subsurface activities. The article then discusses how viewing subsurface invasions as Nuisances would remove legal barriers to implementation of new and emerging climate change mitigating technologies that utilize subsurface pore space, such as CCS
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Getting Past Possession: Subsurface Property Disputes as Nuisances
UW Law Digital Commons, 2020Co-Authors: Schremmer, Joseph A.Abstract:Property rights in the subsurface of land are adapting to accommodate modern activities like massive hydraulic fracturing (fracking). Property rights will need to continue adapting if they are going to accommodate other developing activities like large-scale carbon capture and storage (CCS). Courts and commentators rarely approach the nature of subsurface property directly. They tend instead to discuss appropriate standards for tort liability when disputes arise—for example when artificial fissures from a frac treatment extend into and drain oil or gas from a neighbor’s land. The case law and literature generally approach unauthorized subterranean invasions as trespasses. Because the tort of trespass is designed to protect possession, its application indicates a view of subsurface property as possessory (or corporeal) in nature. Despite calling subsurface invasions “trespasses,” courts rarely impose liability for, or enjoin, invasions themselves. They instead find liability only for interferences with existing or foreseeable uses of the affected land. Leading scholars likewise advocate for a standard of subsurface “trespass” that would privilege encroachments that are societally valuable, and award compensation only for resulting harm to existing uses of the property. The cases and literature thus nominally apply trespass but modify the tort from a property rule into a liability rule resembling the tort of Nuisance. This Article is the first to examine unauthorized subsurface encroachments as Nuisances, rather than trespasses, and to assert that such encroachments do not implicate possession. Drawing on geology, doctrine, and property theory, this Article interrogates the assumption that subsurface property is possessory. It analyzes prominent subsurface “trespass” cases involving waste disposal, enhanced oil recovery, fracking, natural gas storage, slant-hole wells, tunneling, and horizontal drilling to demonstrate that these disputes are already being resolved under Nuisance-like principles. It argues that express application of Nuisance law is doctrinally correct and would improve courts’ reasoning, harmonize disparate results, and more efficiently allocate costs of subsurface activities. The Article then discusses how viewing subsurface invasions as Nuisances would remove legal barriers to implementation of new and emerging climate change mitigating technologies that utilize subsurface pore space, such as CCS
Stephen Shum - One of the best experts on this subject based on the ideXlab platform.
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the mit ll 2010 speaker recognition evaluation system scalable language independent speaker recognition
International Conference on Acoustics Speech and Signal Processing, 2011Co-Authors: Douglas E Sturim, William M Campbell, Najim Dehak, Zahi N Karam, Alan V Mccree, D A Reynolds, Fred Richardson, Pedro A Torrescarrasquillo, Stephen ShumAbstract:Research in the speaker recognition community has continued to address methods of mitigating variational Nuisances. Telephone and auxiliary-microphone recorded speech emphasize the need for a robust way of dealing with unwanted variation. The design of recent 2010 NIST-SRE Speaker Recognition Evaluation (SRE) reflects this research emphasis. In this paper, we present the MIT submission applied to the tasks of the 2010 NIST-SRE with two main goals—language-independent scalable modeling and robust Nuisance mitigation. For modeling, exclusive use of inner product-based and cepstral systems produced a language-independent computationally-scalable system. For robustness, systems that captured spectral and prosodic information, modeled Nuisance subspaces using multiple novel methods, and fused scores of multiple systems were implemented. The performance of the system is presented on a subset of the NIST SRE 2010 core tasks.
Asher D Ghertner - One of the best experts on this subject based on the ideXlab platform.
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Nuisance talk and the propriety of property middle class discourses of a slum free delhi
Antipode, 2012Co-Authors: Asher D GhertnerAbstract:This paper examines the narratives through which associations of private property owners in Delhi depict slums as zones of incivility and "Nuisance." In tracing how this "Nuisance talk" travels into and gains legitimacy in popular and state visions of urban space, the paper shows the role of discourse in justifying and enacting exclusionary urban imaginaries. As a lay term, Nuisance is widely used to identify forms of aesthetic impropriety. But, as a primary element of environmental law, Nuisance operates discursively as a catchall category allowing diverse private grievances to be expressed in terms of environmental welfare and the public interest. The widening depiction of slums as Nuisances hence reworks the public/private divide, inserting once local codes of civility into the core of public life. By examining how Nuisance talk circulates between property owners' associations, the media, and the government, the paper shows how slum demolitions have become widely read as a form of environmental improvement.
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analysis of new legal discourse behind delhi s slum demolitions
Economic and Political Weekly, 2008Co-Authors: Asher D GhertnerAbstract:A discourse analysis of court documents in slum-related cases from the past 25 years leads to the conclusion that the basic statement that "slums are illegal' is a very recent juridical discourse and the rise of court orders to demolish slums is due to reinterpretation of Nuisance law. The "new Nuisance discourse' that arose in the early 2000s re-problematised slums as Nuisances and became the primary mechanism by which slum demolitions take place at present.
Mitra Fouladirad - One of the best experts on this subject based on the ideXlab platform.
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Optimal statistical fault detection with Nuisance parameters
Automatica, 2005Co-Authors: Mitra Fouladirad, Igor NikiforovAbstract:Fault detection is addressed within a statistical framework. The goal of this paper is to propose an optimal statistical tool to detect a fault in a linear stochastic (dynamical) system with uncertainties (Nuisance parameters or Nuisance faults). It is supposed that the Nuisance parameters are unknown but non-random; practically, this means that the Nuisance can be intentionally chosen to maximize its negative impact on the monitored system (for instance, to mask a fault). Examples of ground station based and receiver autonomous Global Positioning System (GPS) integrity monitoring illustrate the proposed method.
