Bibliografías temáticas / Exploration noise

Literatura académica sobre el tema "Exploration noise"

Autor: Grafiati
Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Exploration noise"

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Liu, Jinyi, Zhi Wang, Yan Zheng, Jianye Hao, Chenjia Bai, Junjie Ye, Zhen Wang, Haiyin Piao y Yang Sun. "OVD-Explorer: Optimism Should Not Be the Sole Pursuit of Exploration in Noisy Environments". Proceedings of the AAAI Conference on Artificial Intelligence 38, n.º 12 (24 de marzo de 2024): 13954–62. http://dx.doi.org/10.1609/aaai.v38i12.29303.

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In reinforcement learning, the optimism in the face of uncertainty (OFU) is a mainstream principle for directing exploration towards less explored areas, characterized by higher uncertainty. However, in the presence of environmental stochasticity (noise), purely optimistic exploration may lead to excessive probing of high-noise areas, consequently impeding exploration efficiency. Hence, in exploring noisy environments, while optimism-driven exploration serves as a foundation, prudent attention to alleviating unnecessary over-exploration in high-noise areas becomes beneficial. In this work, we propose Optimistic Value Distribution Explorer (OVD-Explorer) to achieve a noise-aware optimistic exploration for continuous control. OVD-Explorer proposes a new measurement of the policy's exploration ability considering noise in optimistic perspectives, and leverages gradient ascent to drive exploration. Practically, OVD-Explorer can be easily integrated with continuous control RL algorithms. Extensive evaluations on the MuJoCo and GridChaos tasks demonstrate the superiority of OVD-Explorer in achieving noise-aware optimistic exploration.
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Blanchard, Olivier J., Jean-Paul L'Huillier y Guido Lorenzoni. "News, Noise, and Fluctuations: An Empirical Exploration". American Economic Review 103, n.º 7 (1 de diciembre de 2013): 3045–70. http://dx.doi.org/10.1257/aer.103.7.3045.

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We explore empirically models of aggregate fluctuations in which consumers form anticipations about the future based on noisy sources of information and these anticipations affect output in the short run. Our objective is to separate fluctuations due to changes in fundamentals (news) from those due to temporary errors in agents' estimates (noise). We show that structural VARs cannot be used to identify news and noise shocks, but identification is possible via a method of moments or maximum likelihood. Next, we estimate our model on US data. Our results suggest that noise shocks explain a sizable fraction of short-run consumption fluctuations. (JEL D84, E13, E21, E32)
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Narščius, Aleksas y Donatas Bagočius. "Assessment of Seismic Exploration Noise at Lithuanian Area of the Baltic Sea". DARNIOS APLINKOS VYSTYMAS 21, n.º 1 (10 de mayo de 2024): 48–56. http://dx.doi.org/10.52320/dav.v21i1.299.

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An article presents an evaluation of the underwater noise of the performed bottom seismic surveys in the waters of the Lithuanian Baltic Sea, analyzes the underwater noise levels that were determined by mathematical modelling. It presents an assessment of the risks posed to marine mammals by extremely high intensity underwater noise levels in the research area. Possibilities of underwater noise reduction for these noisy activities discussed.
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Abrams, Michael L. "Noise suppression during seismic exploration". Journal of the Acoustical Society of America 84, n.º 6 (diciembre de 1988): 2302. http://dx.doi.org/10.1121/1.397004.

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Liu, Qian, Xuan Feng, Cai Liu, Minghe Zhang, You Tian y Hesheng Hou. "Metallic mineral exploration by using ambient noise tomography in Ashele copper mine, Xinjiang, China". GEOPHYSICS 87, n.º 3 (14 de marzo de 2022): B221—B231. http://dx.doi.org/10.1190/geo2020-0923.1.

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Rapid advances in the seismic exploration method have allowed its application in metallic mineral exploration. However, 2D seismic profiles are often insufficient to describe the shape and areal extent of ore-bearing rock masses away from survey lines. Although more complete, collecting 3D seismic data is expensive, time consuming, and may require considerable investment in surface access. The combination of ambient noise tomography and 2D seismic reflection exploration methods can produce acceptable results relatively quickly and at a low cost. The enormous Ashele copper deposit in northwest China is a typical deposit formed by volcanic eruption. It is rich in resources and possesses good prospecting potential in its deeper and peripheral areas. We performed ambient noise tomography to investigate a near-surface 3D S-wave velocity ([Formula: see text]) structure above a depth of 0.7 km in the Ashele mining area (approximately 8 × 12 km) using 25 days of continuous ambient noise data. From the combined interpretation of the 3D [Formula: see text] structure and the existing 2D seismic reflection profile, we infer that there may be ore-bearing rock masses in the western and northern sides of the research area. We report the discovery of an ancient volcano at a depth of 500 m on the western side of this region. The banded velocity anomalies and the existence of the ancient volcano signify the formation process of a bimodal volcanic rock association. It has been proven that the combination of ambient noise tomography and 2D seismic reflection exploration methods can produce important results in metallic mineral exploration. Therefore, ambient noise tomography can be used as an economical, convenient, and efficient method for future explorations, complementing the 2D seismic reflection exploration method.
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Osowski, Stanislaw, Krzysztof Siwek y Tomasz Grzywacz. "Exploration of noisy data in differential electronic nose". COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, n.º 4 (4 de julio de 2016): 1382–92. http://dx.doi.org/10.1108/compel-08-2015-0279.

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Purpose – The paper is concerned with exploration of sensor signals in differential electronic nose. It is a special type of nose, which applies double sensor matrices and exploits only their differential signals, which are used in recognition of patterns associated with them. The purpose of this paper is to study the application of differential nose in dynamic measurement of aroma of 11 brands of cigarettes. Design/methodology/approach – The most important task in pattern recognition using electronic nose is its resistance to the noise corrupting the measurement. The authors will analyze and compare the performance of the nose in the noisy environment by applying two classifier systems: the support vector machine (SVM) and random forest (RF) of decision trees. Findings – On the basis of numerical experiments the authors have found that application of SVM as the classifier in the electronic nose is more advantageous than RF, especially at high level of noise and small number of measuring sensors. Its application allowed to recognize 11 brands of cigarettes with the accuracy close to 100 percent. Practical implications – Thanks to application of two identical sensors working in a differential mode the authors avoid the baseline estimation and thus the solution is well suited for on-line dynamic measurements of the process. Originality/value – The paper has studied the advantages and limitations of the differential electronic nose following from the existence of the noise, corrupting the measurements. It has pointed an important role of the applied classifier system in getting the electronic nose of the highest quality.
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Yang, Yu, Qi Ran, Kang Chen, Cheng Lei, Yusheng Zhang, Han Liang, Song Han y Cong Tang. "Denoising Seismic Data via a Threshold Shrink Method in the Non-Subsampled Contourlet Transform Domain". Mathematical Problems in Engineering 2022 (8 de agosto de 2022): 1–12. http://dx.doi.org/10.1155/2022/1013623.

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In seismic exploration, effective seismic signals can be seriously distorted by and interfered with noise, and the performance of traditional seismic denoising approaches can hardly meet the requirements of high-precision seismic exploration. To remarkably enhance signal-to-noise ratios (SNR) and adapt to high-precision seismic exploration, this work exploits the non-subsampled contourlet transform (NSCT) and threshold shrink method to design a new approach for suppressing seismic random noise. NSCT is an excellent multiscale, multidirectional, and shift-invariant image decomposition scheme, which can not only calculate exact contourlet transform coefficients through multiresolution analysis but also give an almost optimized approximation. It has better high-frequency response and stronger ability to describe curves and surfaces. Specifically, we propose to utilize the superior performance NSCT to decomposing the noisy seismic data into various frequency sub-bands and orientation response sub-bands, obtaining fine enough transform high frequencies to effectively achieve the separation of signals and noises. Besides, we use the adaptive Bayesian threshold shrink method instead of traditional handcraft threshold scheme for denoising the high-frequency sub-bands of NSCT coefficients, which pays more attention to the internal characteristics of the signals/data itself and improve the robustness of method, which can work better for preserving richer structure details of effective signals. The proposed method can achieve seismic random noise attenuation while retaining effective signals to the maximum degree. Experimental results reveal that the proposed method is superior to wavelet-based and curvelet-based threshold denoising methods, which increases synthetic seismic data with lower SNR from −8.2293 dB to 8.6838 dB, and 11.8084 dB and 9.1072 dB higher than two classic sparse transform based methods, respectively. Furthermore, we also apply the proposed method to process field data, which achieves satisfactory results.
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Wang, Rubin, Guanzheng Wang y Jinchao Zheng. "An Exploration of the Range of Noise Intensity That Affects the Membrane Potential of Neurons". Abstract and Applied Analysis 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/801642.

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Neuronal activity in the human brain occurs in a complex physiologic environment, and noise from all aspects in this physiologic environment affects all aspects of nervous-system function. An essential issue of neural information processing is whether the environmental noise in a neural system can be estimated and quantified in a proper way. In this paper, we calculated the neural energy to estimate the range of critical values of thermal noise intensity that markedly affect the membrane potential and the energy waveform, in order to define such a noisy environment which neuronal activity relies on.
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Sun, Chuxiong, Rui Wang, Qian Li y Xiaohui Hu. "Reward Space Noise for Exploration in Deep Reinforcement Learning". International Journal of Pattern Recognition and Artificial Intelligence 35, n.º 10 (21 de mayo de 2021): 2152013. http://dx.doi.org/10.1142/s0218001421520133.

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A fundamental challenge for reinforcement learning (RL) is how to achieve efficient exploration in initially unknown environments. Most state-of-the-art RL algorithms leverage action space noise to drive exploration. The classical strategies are computationally efficient and straightforward to implement. However, these methods may fail to perform effectively in complex environments. To address this issue, we propose a novel strategy named reward space noise (RSN) for farsighted and consistent exploration in RL. By introducing the stochasticity from reward space, we are able to change agent’s understanding about environment and perturb its behaviors. We find that the simple RSN can achieve consistent exploration and scale to complex domains without intensive computational cost. To demonstrate the effectiveness and scalability of the proposed method, we implement a deep Q-learning agent with reward noise and evaluate its exploratory performance on a set of Atari games which are challenging for the naive [Formula: see text]-greedy strategy. The results show that reward noise outperforms action noise in most games and performs comparably in others. Concretely, we found that in the early training, the best exploratory performance of reward noise is obviously better than action noise, which demonstrates that the reward noise can quickly explore the valuable states and aid in finding the optimal policy. Moreover, the average scores and learning efficiency of reward noise are also higher than action noise through the whole training, which indicates that the reward noise can generate more stable and consistent performance.
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McCracken, K. G., M. L. Oristaglio y G. W. Hohmann. "Minimization of noise in electromagnetic exploration systems". GEOPHYSICS 51, n.º 3 (marzo de 1986): 819–32. http://dx.doi.org/10.1190/1.1442134.

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The noise in electromagnetic (EM) surveys that originates in time‐dependent magnetic fields is quantified as a function of geographic location, season, and polarization. An overall variability of [Formula: see text] is observed. The variance of the observed geophysical data caused by this noise is quantified in terms of the noise bandwidth of the signal‐processing system. While a time‐domain EM (TEM) system has a wide bandwidth for the target (i.e., synchronous) signal, it has a narrow bandwidth for the asynchronous EM noise. A procedure is developed to compute the magnetic moment required to provide a specified ratio of signal to noise (S/N) in the survey data for frequency‐domain EM (FEM) and both step‐ response and impulse‐response TEM. This procedure indicates that magnetic moments in the range [Formula: see text] to [Formula: see text] are necessary for moving transmitter systems, and up to [Formula: see text] for fixed‐loop systems, for both frequency and time domain. A number of models of the overburden are established, and we show that the half‐space response is strongly dependent upon geology and weathering history. A variation of three orders of magnitude in the half‐space response occurs throughout the world. A procedure is defined to calculate the smallest target response detectable in the presence of a specified level of geologic noise. From this response we show that the overburden in the tropical and arid zones of the Earth strongly desensitizes the EM method. This is particularly severe for those styles of mineralization yielding short decay time constants. We conclude it would be impossible to detect targets with time constants <3 ms in substantial portions of the world’s arid zone using EM alone. An overall survey design procedure is defined that determines whether a specified target would be detectable in the presence of the prevailing geologic noise, and the magnetic moment that would be required to detect it in the presence of the anticipated EM noise. The manner in which the primary field corrupts both frequency‐ and time‐domain systems is also analyzed, and we conclude that the TEM method is essentially free of primary field effects, while the simpler forms of FEM can be corrupted by primary field effects which obscure targets with secondary responses that are less than 10 percent of the primary field.
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Tesis sobre el tema "Exploration noise"

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Lloyd-Jones, Rebecca Louise. "Amid the Noise: A Percussionist's Exploration of Creative Practice". Thesis, Griffith University, 2016. http://hdl.handle.net/10072/370333.

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This exegesis explores the relationships between the roles of performer, interpreter and composer and the location of my own individual creativity as a percussionist/musician within this nexus. Accompanying this exegesis is a creative portfolio, consisting of original compositions, arrangements and recordings of selected Australian percussion repertoire that I have performed. Adopting a practice-based research method, I have aimed to document the multifaceted approach taken in my own music-making, detailing the outcomes reached on this journey. I have endeavoured to develop and present different perspectives for applying my acquired musical knowledge through composition, collaboration and performing, and this is presented through a creative portfolio, which accompanies this exegesis. I also am examining the expansion of my practice, through the integration of using recording as documentation, and the broadening outcome that has had on the product I produce. I also investigate what influence dedicating myself to performing others’ compositions has had upon my practice to date. This exegesis is about opening windows into new sonic terrain and examining some of the boundaries and traditions prevalent in Western Art Music. I have attempted to do this through the eyes of an active music-maker—making informed decisions about musical contour based on improvisation, exploration and intuition.
Thesis (Masters)
Master of Music Research (MMusRes)
Queensland Conservatorium
Arts, Education and Law
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Parsons, Adrian. "Seismic exploration techniques applied to ultrasonic imaging within concrete". Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368818.

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Levine, Matthew Jason. "A framework for technology exploration of aviation environmental mitigation strategies". Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54437.

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The goal of this thesis was to develop a framework for modeling relevant environmental performance metrics and objectively simulating the future environmental impacts of aviation given the evolution of the fleet, the development of new technologies, and the expansion of airports. By exchanging fidelity for computational speed, a screening-level framework for assessing aviation's environmental impacts can be developed to observe new insights on fleet-level trends and inform environmental mitigation strategies. This was accomplished by developing per class average ``generic-vehicle" models that can reduce the fleet to a few representative aircraft models for predicting fleet results with reasonable accuracy. The method for Generating Emissions and Noise, Evaluating Residuals and using Inverse method for Choosing the best Alternatives (GENERICA) expands a previous generic vehicle formulation to additionally match DNL contours across a subset of airports. Designs of experiments, surrogate models, Monte Carlo simulations, and ``desirability" scores were combined to set the vehicle design parameters and reduce the mean relative error across the subset of airports. Results show these vehicle models more accurately represented contours at busy airports operating a wide variety of aircraft as compared to a traditional representative-in-class approach. Additionally, a rapid method for assessing population exposure counts was developed and incorporated into the noise tool, and the generic vehicles demonstrated accuracy with respect to population exposure counts for the actual fleet in the baseline year. The capabilities of the enabled framework were demonstrated to show fleet-level trends and explore placement of new runways at capacity constrained airports.
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Miller, Nolan W. "Athenian Acoustics: A Sonic Exploration". Ohio University Honors Tutorial College / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1556289254557967.

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Syversætre, Johannessen Vega. "White Noise : An exploration of tufted surfacesin relation to sound, physicalcontact and tactility". Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-615.

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This project is about exploring a textile surface with the design elements of sound, physical contact and tactility. It is interesting to analyse how audio and physical elements can help stimulate the human senses. The aim is to bring these elements into a design context and create a textile surface that can give people a sensory and spatial experience. Through tufting it is possible to work with long and short pile, which adds tactile values in the material. The outcome of this exploration is a vast tufted landscape that partly covers the wall and continues out on the floor. The surface has an abstract visual appearance with irregular shapes that defines the different material. The large scale has an overwhelming effect and invites people to interact and explore the surface. This challenges the fundamental structures of architecture and increases the importance of tactile and human senses, such as curiosity in spatial environments
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Rajendran, Aravind. "Noise Margin, Critical Charge and Power-Delay Tradeoffs for SRAM Design Space Exploration". Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1307667225.

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Setiawan, Panji. "Exploration and optimization of noise reduction algorithms for speech recognition in embedded devices /". Aachen : Shaker, 2009. http://d-nb.info/99453583X/04.

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Lautakoski, Johan. "Procedurell generering av terräng Perlin noise eller Diamond-Square : med fokus på exekveringstid och framkomlighet". Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12940.

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Setiawan, Panji [Verfasser]. "Exploration and Optimization of Noise Reduction Algorithms for Speech Recognition in Embedded Devices / Panji Setiawan". Aachen : Shaker, 2009. http://d-nb.info/1156517788/34.

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White, Robert J. "Exploration of a Strategy for Reducing Gear Noise in Planetary Transmissions and Evaluation of Laser Vibrometry as a Means for Measuring Transmission Error". Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1129928063.

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Libros sobre el tema "Exploration noise"

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Blanchard, Olivier. News, noise, and fluctuations: An empirical exploration. Cambridge, MA: National Bureau of Economic Research, 2009.

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Blanchard, Olivier. News, noise, and fluctuations: An empirical exploration. Cambridge, MA: Massachusetts Institute of Technology, Dept. of Economics, 2009.

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Workshop, to Develop Methodologies for Conducting Research on the Effects of Seismic Exploration on the Canadian East Coast Fishery (2000 Halifax N. S. ). Proceedings of a workshop to develop methodologies for conducting research on the effects of seismic exploration on the Canadian east coast fishery, Halifax, Nova Scotia, 7-8 September 2000. Calgary, Alta: Environmental Studies Research Funds, 2001.

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Exploration de l'Afrique noire. Paris: Editions du Chêne, 2002.

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Steve, Parker. Earsplitters! the world's loudest noises. Mankato, Minn: Capstone Press, 2009.

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Suzanne, Shera, Shamo Denis y United States. National Aeronautics and Space Administration., eds. Studies of Avalanche Photodiodes (APDs) as readout devices for scintillating fibers for high energy gamma-ray astronomy telescopes: Technical progress report : period of performance, January 16, 1998-May 15, 1998. Watertown, MA: Radiation Monitoring Devices, 1998.

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Carpenter, Edmund Snow. Norse penny. New York: Rock Foundation, 2003.

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Hopkins, Andrea. Vikings: The Norse discovery of America. New York: PowerKids Press, 2002.

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Norse in Newfoundland: A critical examination of archaeological research at the Norse site at L'Anse aux Meadows, Newfoundland. Oxford: Archaeopress, 2012.

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Norse America, tenth century onward. Evanston, IL: Valhalla Press, 1996.

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Capítulos de libros sobre el tema "Exploration noise"

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Al-Shuhail, Abdullatif y Saleh Al-Dossary. "Introduction to Seismic Exploration". En Attenuation of Incoherent Seismic Noise, 1–39. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32948-8_1.

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Urban, Heinz G. "Directional Measurement of Deep Sea Ambient Noise Spectra". En Acoustic Signal Processing for Ocean Exploration, 41–49. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1604-6_3.

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Krishnan, Nallaperumal, Subramanyam Muthukumar, Subban Ravi, D. Shashikala y P. Pasupathi. "Image Restoration by Using Evolutionary Technique to Denoise Gaussian and Impulse Noise". En Mining Intelligence and Knowledge Exploration, 299–309. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-03844-5_31.

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Rajé, Fiona, Delia Dimitriu, Dan Radulescu, Narcisa Burtea y Paul Hooper. "Competing Agendas for Land-Use Around Airports". En Aviation Noise Impact Management, 141–69. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91194-2_6.

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AbstractThis chapter describes the core aspects of the land-use planning (LUP) element of the Balanced Approach (BA) by acknowledging the potential of effective LUP as one of the few anticipatory tools available to manage noise. It explores the planning shortcomings that fail to stop encroachment and, thus, the need for remedial mitigation actions such as sound insulation, compensation and buy-out. It goes on to outline core future challenges and steps to develop a better spatial understanding of noise through improved understanding of people’s soundscapes (e.g. via the ANIMA app). To illustrate how LUP challenges can be addressed, the chapter also presents case studies from Iasi Airport and on insulation campaigns, in Marseille and Heathrow respectively. It concludes with an exploration of the lessons that can be taken from LUP experience and examines how more comprehensive communication and engagement with key stakeholders underpins more effective application of planning tools.
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Polom, Ulrich. "Elimination of Noise Caused by Spikes and Bursts in Vibroseis Data". En Seismic Exploration of the Deep Continental Crust, 319–44. Basel: Birkhäuser Basel, 1999. http://dx.doi.org/10.1007/978-3-0348-8670-3_17.

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Freeman, Walter J. "Opening Feedback Loops with Surgery and Anesthesia; Closing the Loops with Noise". En Neurodynamics: An Exploration in Mesoscopic Brain Dynamics, 125–39. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0371-4_6.

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Wu, Q. y K. M. Wong. "Estimation of the Directions of Arrival of Signals in Unknown Correlated Noise: Application of Gerenalized Correlation Analysis". En Acoustic Signal Processing for Ocean Exploration, 237–46. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1604-6_24.

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Jiang, Hongliang, Chaobo Lu, Chunfa Xiong y Mengkun Ran. "Seismic Data Denoising Analysis Based on Monte Carlo Block Theory". En Lecture Notes in Civil Engineering, 339–49. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2532-2_28.

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AbstractDenoising of seismic data has always been an important focus in the field of seismic exploration, which is very important for the processing and interpretation of seismic data. With the increasing complexity of seismic exploration environment and target, seismic data containing strong noise and weak amplitude seismic in-phase axis often contain many weak feature signals. However, weak amplitude phase axis characteristics are highly susceptible to noise and useful signal often submerged by background noise, seriously affected the precision of seismic data interpretation, dictionary based on the theory of the monte carlo study seismic data denoising method, selecting expect more blocks of data, for more accurate MOD dictionary, to gain a higher quality of denoising of seismic data. Monte carlo block theory in this paper, the dictionary learning dictionary, rules, block theory and random block theory is example analysis test, the dictionary learning algorithm based on the results of three methods to deal with, and the numerical results show that the monte carlo theory has better denoising ability, the denoising results have higher SNR, and effectively keep the weak signal characteristics of the data; In terms of computational efficiency, the proposed method requires less time and has higher computational efficiency, thus verifying the feasibility and effectiveness of the proposed method.
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Sidorovskaia, Natalia A., Azmy S. Ackleh, Christopher O. Tiemann, Baoling Ma, Juliette W. Ioup y George E. Ioup. "Passive Acoustic Monitoring of the Environmental Impact of Oil Exploration on Marine Mammals in the Gulf of Mexico". En The Effects of Noise on Aquatic Life II, 1007–14. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-2981-8_125.

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Goss, W. M., Claire Hooker y Ronald D. Ekers. "Consolidation: Leadership at RPL, 1950–1951". En Historical & Cultural Astronomy, 283–95. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-07916-0_19.

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AbstractThe 1950s was a decade of wonderful flowering and exploration for the CSIRO Division of Radiophysics. From 1950, solar noise and cosmic noise scientists became “radio astronomers”. They were present as such in international astronomy as well as radio science meetings. The key achievements of the first 5 years of observing and categorising solar bursts and detecting and measuring discrete radio sources, had produced a set of challenging new research questions. Some were conceptual and theoretical—including, the nature of the unknown non-thermal radiation mechanism that underpinned cosmic radiation emission. Some concerned the complexities and challenges of instrumentation—the early 1950s saw swift innovation of instruments and methods, in order to resolve new research questions.
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Actas de conferencias sobre el tema "Exploration noise"

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Lambert, M. A., S. M. Schmalholz, E. H. Saenger y B. Steiner. "Goodbye Noise, Hello Signal! Improving Microseismic Monitoring in Noisy Environments". En EAGE Passive Seismic Workshop - Exploration and Monitoring Applications 2009. Netherlands: EAGE Publications BV, 2009. http://dx.doi.org/10.3997/2214-4609.20146745.

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Huot, Fantine, Yinbin Ma, Robert Cieplicki, Eileen Martin y Biondo Biondi. "Automatic noise exploration in urban areas". En SEG Technical Program Expanded Abstracts 2017. Society of Exploration Geophysicists, 2017. http://dx.doi.org/10.1190/segam2017-17774369.1.

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SCHREURS, E., J. JABBEN y E. VERHEIJEN. "NOISE OF HIGH SPEED TRAINS IN THE NETHERLANDS AN EXPLORATION". En Noise in the Built Environment 2010. Institute of Acoustics, 2023. http://dx.doi.org/10.25144/17192.

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Shenvi, Mohit, Anish Gorantiwar, Corina Sandu y Saied Taheri. "Vibration Characteristics and Control Algorithms for Semi-Active Suspension of Space Exploration Vehicles". En Noise and Vibration Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-1064.

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<div class="section abstract"><div class="htmlview paragraph">Suspension systems are an integral part of land vehicles and contribute significantly to the vehicle performance in terms of its ride comfort and road holding characteristics. In the case of Space Exploration Vehicles (SEVs), the requirement of these unmanned vehicles is to rove, collect pictures and transmit data back to the earth. This is generally performed with the help of exteroceptive, and proprioceptive sensors mounted on the main chassis of the SEV. The design of various components of such vehicles is dictated by the assumption of extreme terrain and environmental conditions that it might face. The Mars Exploration Rovers (MERs) have incorporated the use of the “Rocker-Bogie” mechanism for the suspension system which provides relative stability to the MER for various maneuvers. In this work, the “Rocker-Bogie” mechanism is modeled and simulated as a planar kinematic model using parameters of the Perseverance rover. It is found that the Rocker-Bogie tends to nullify the effects of uneven terrain by maintaining the chassis at a relatively fixed location with respect to the ground reference frame. Further, an attempt is made to replace the mechanism with a passive and semi-active suspension module at four corner wheels to study the effects that the semi-active suspension would have on the chassis dynamics of the MER. Lastly, a comparative analysis of the vertical acceleration of the chassis using different suspensions was performed. This concluded that the rocker-bogie mechanism does help to stabilize the chassis dynamic behavior to a greater extent. Future work could include an attempt to utilize the rocker-bogie chassis dynamics as the ideal condition to develop control strategies that can improve the chassis dynamics if individual semi-active suspension systems were employed.</div></div>
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Choromanski, Krzysztof, Atil Iscen, Vikas Sindhwani, Jie Tan y Erwin Coumans. "Optimizing Simulations with Noise-Tolerant Structured Exploration". En 2018 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2018. http://dx.doi.org/10.1109/icra.2018.8460492.

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Xu, Hui, Chong Zhang, Jiaxing Wang, Deqiang Ouyang, Yu Zheng y Jie Shao. "Exploring Parameter Space with Structured Noise for Meta-Reinforcement Learning". En Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California: International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/436.

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Efficient exploration is a major challenge in Reinforcement Learning (RL) and has been studied extensively. However, for a new task existing methods explore either by taking actions that maximize task agnostic objectives (such as information gain) or applying a simple dithering strategy (such as noise injection), which might not be effective enough. In this paper, we investigate whether previous learning experiences can be leveraged to guide exploration of current new task. To this end, we propose a novel Exploration with Structured Noise in Parameter Space (ESNPS) approach. ESNPS utilizes meta-learning and directly uses meta-policy parameters, which contain prior knowledge, as structured noises to perturb the base model for effective exploration in new tasks. Experimental results on four groups of tasks: cheetah velocity, cheetah direction, ant velocity and ant direction demonstrate the superiority of ESNPS against a number of competitive baselines.
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Ayers, Ray R., Warren T. Jones y David Hannay. "Methods to Reduce Lateral Noise Propagation From Seismic Exploration Vessels". En ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79673.

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This paper covers the development of methods and equipment for reducing lateral noise propagation from seismic exploration vessels operating in the Alaskan Beaufort and Chukchi Seas. Oil exploration activities are currently taking place or are planned, and there is a need for creating methods and equipment to reduce lateral noise propagation from seismic exploration. This project is supported by the U.S. Minerals Management Service, which has the responsibility and authority to ensure that oil and gas exploration and production activities are conducted in a safe and environmentally sound manner. This research effort includes a literature synthesis and review to identify existing seismic exploration technologies (airguns) and involves developing promising methods and technologies that could potentially reduce the lateral propagation of sound from those airguns. Three principal areas have been explored: (a) Attenuating lateral noise with air bubble curtains, like has been shown in the literature, or with some special bubble curtain material, acting as a more solid curtain-like barrier, (b) Making arrays more directional, and thus narrow the cone of sound, and (c) Changing the structure of the airguns to reduce high frequency sound (noise) while maintaining the strong source signal needed for exploration purposes. This paper (a) describes our preliminary findings in each of the above areas and (b) shows that deploying bubble curtains outboard of the seismic arrays towed by the same exploration vessel can potentially produce the sought-after noise reduction, while the minimizing impact on the traditional seismic exploration operations.
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Xu, Y., S. Lebedev, R. Bonadio, T. Meier, C. Bean, M. Rezaeifar y D. Hariri. "Seismic imaging at a mineral-deposit scale using high-frequency surface waves (0.5–24 Hz) in ambient noise wavefield". En Mineral Exploration Symposium. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.202089007.

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Hivin, Ludovic, Jung-ho Lewe, Holger Pfaender y Dimitri N. Mavris. "Scenario Exploration for Sustainability of the Multimodal Intercity Transportation System". En AIAA/3AF Aircraft Noise and Emissions Reduction Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-3280.

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Batalha, Tania, Stephan Plisson-Saune y Nico De Sadeleer. "Integrated Noise protection program - from Noise measurements to epidemiology". En International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/157292-ms.

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Informes sobre el tema "Exploration noise"

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Blanchard, Olivier, Jean-Paul L'Huillier y Guido Lorenzoni. News, Noise, and Fluctuations: An Empirical Exploration. Cambridge, MA: National Bureau of Economic Research, mayo de 2009. http://dx.doi.org/10.3386/w15015.

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Bickel, V. T., B. Moseley, E. Hauber, M. Shirley, J. P. Williams y D. A. Kring. CHARACTERIZATION OF SHADOWED REGIONS AT THE LUNAR SOUTH POLE. Frontier Development Lab, julio de 2022. http://dx.doi.org/10.56272/gqkz6227.

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This image repository contains a total of 576 non map-projected HORUS (Hyper-effective nOise Removal Unet Software) post-processed images of permanently shadowed regions (PSRs) located across the Artemis exploration zone at the lunar south pole (144 individual images).
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Pulliam, Robert, Frank Sepulveda, Joseph Thangraj, Diego Quiros, John Queen, Marge Queen y Joe Iovenitti. DEVELOPMENT OF A NOVEL, NEAR REAL TIME APPROACH TO GEOTHERMAL SEISMIC EXPLORATION AND MONITORING VIA AMBIENT SEISMIC NOISE INTERFEROMETRY. Office of Scientific and Technical Information (OSTI), diciembre de 2019. http://dx.doi.org/10.2172/1648329.

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DeJonckere, P. H., B. Millet, R. Van Gool, A. Martens, M. Lefrancq, L. Litière, E. Meyer y J. Lebacq. Reliability of Electro-physiologically Evoked Auditory Steady State Responses. Progress in Neurobiology, abril de 2024. http://dx.doi.org/10.60124/j.pneuro.2024.10.03.

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The electrophysiological technique of auditory steady state responses (ASSR) makes possible objective hearing threshold definition, with frequency specificity. A high level of reliability is a basic requirement for applying this technique in a medicolegal context. 35 subjects affected by significant occupational noise induced hearing loss and claiming compensation underwent a thorough medical and audiological examination, including an analysis of the auditory steady state responses (ASSR) in order to objectively define hearing thresholds with frequency specificity, and ear-by-ear. In order to investigate the reproducibility of the thresholds obtained by this technique, the electrophysiological exploration was repeated immediately after the first test. An exhaustive statistical comparison of the results rejects the hypothesis of any significant difference between the results of both exams, whatever severity of hearing loss and frequency. All correlation coefficients (R and ICC) and Cronbach’s α values reach or exceed 0.9. Bland-Altman plots rule out systematic shifts, as well as proportional errors, or variations that depends on the magnitude of the measurements.
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