Relevant bibliographies by topics / Threshold Detector

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Threshold Detector'

Author: Grafiati
Published: 3 June 2025
Last updated: 20 July 2025

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Journal articles on the topic "Threshold Detector"

1

Thomson, David L. "Adaptive threshold voiced detector." Journal of the Acoustical Society of America 93, no. 1 (1993): 592. http://dx.doi.org/10.1121/1.405576.

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Pai, Pei-Yan, Chin-Chen Chang, Yung-Kuan Chan, and Meng-Hsiun Tsai. "An adaptable threshold detector." Information Sciences 181, no. 8 (2011): 1463–83. http://dx.doi.org/10.1016/j.ins.2010.12.007.

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Crouse, William G., and Charles R. Knox. "Speech detector with variable threshold." Journal of the Acoustical Society of America 82, no. 5 (1987): 1863. http://dx.doi.org/10.1121/1.395725.

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Okx, W. J. C., C. W. E. Van Eijk, N. W. Tanner, and R. De Vries. "A compact threshold Cherenkov detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 289, no. 3 (1990): 614–17. http://dx.doi.org/10.1016/0168-9002(90)91539-n.

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Okx, W. J. C., C. W. E. van Eijk, M. Looman, and N. W. Tanner. "A novel threshold Cherenkov detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 273, no. 2-3 (1988): 548–52. http://dx.doi.org/10.1016/0168-9002(88)90054-x.

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May, Carl J. "Multiple variable threshold speech detector." Journal of the Acoustical Society of America 78, no. 1 (1985): 285. http://dx.doi.org/10.1121/1.392519.

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Martín-Nieto, Rafael, Álvaro García-Martín, José Martínez, and Juan SanMiguel. "Enhancing Multi-Camera People Detection by Online Automatic Parametrization Using Detection Transfer and Self-Correlation Maximization †." Sensors 18, no. 12 (2018): 4385. http://dx.doi.org/10.3390/s18124385.

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Finding optimal parametrizations for people detectors is a complicated task due to the large number of parameters and the high variability of application scenarios. In this paper, we propose a framework to adapt and improve any detector automatically in multi-camera scenarios where people are observed from various viewpoints. By accurately transferring detector results between camera viewpoints and by self-correlating these transferred results, the best configuration (in this paper, the detection threshold) for each detector-viewpoint pair is identified online without requiring any additional manually-labeled ground truth apart from the offline training of the detection model. Such a configuration consists of establishing the confidence detection threshold present in every people detector, which is a critical parameter affecting detection performance. The experimental results demonstrate that the proposed framework improves the performance of four different state-of-the-art detectors (DPM , ACF, faster R-CNN, and YOLO9000) whose Optimal Fixed Thresholds (OFTs) have been determined and fixed during training time using standard datasets.
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Zhang, Yin, Changbin Zheng, Yang Liu, Yunzhe Wang, Yongbo Xu, and Junfeng Shao. "Damage Mechanism of HgCdTe Focal Plane Array Detector Irradiated Using Mid-Infrared Pulse Laser." Sensors 23, no. 23 (2023): 9370. http://dx.doi.org/10.3390/s23239370.

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To investigate the damage threshold and mechanism of a mid-infrared HgCdTe focal plane array (FPA) detector, relevant experimental and theoretical studies were conducted. The line damage threshold of a HgCdTe FPA detector may be within the range of 0.59 Jcm−2 to 0.71 Jcm−2. The full frame damage threshold of the detector may be in the range of 0.86 Jcm−2 to 1.17 Jcm−2. Experimental results showed that when the energy density reaches 1.17 Jcm−2, the detector exhibits irreversible full frame damage and is completely unable to image. Based on the finite element method, a three-dimensional model of HgCdTe FPAs detector was established to study the heat transfer mechanism, internal stress, and damage sequence. When HgCdTe melts, we think that the detector is damaged. Under these conditions, the theoretical damage threshold calculated using the detector model is 0.55 Jcm−2. The difference between theoretical and experimental values was analyzed. The relationship between damage threshold and pulse width was also studied. It was found that when the pulse width is less than 1000 ns, the damage threshold characterized by peak power density is inversely proportional to pulse width. This relationship can help us predict the experimental damage threshold of an FPA detector. This model is reasonable and convenient for studying the damage of FPA detectors with a mid-infrared pulse laser. The research content in this article has important reference significance for the damage and protection of HgCdTe FPA detectors.
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Thyssen, Charlotte, Karel Deprez, Pieter Mollet, Roel Van Holen, and Stefaan Vandenberghe. "Simulation study on the performance of time-over-threshold based positioning in monolithic PET detectors." Physics in Medicine & Biology 66, no. 24 (2021): 245025. http://dx.doi.org/10.1088/1361-6560/ac40d1.

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Abstract The vast majority of PET detectors in the field today are based on pixelated scintillators. Yet, the resolution of this type of detector is limited by the pixel size. To overcome this limitation, one can use monolithic detectors. However, this detector architecture demands specific and high-speed detector readout of the photodetector array. A commonly used approach is to integrate the current pulses generated by every pixel but such circuitry quickly becomes bulky, power consuming and expensive. The objective of this work is to investigate a novel readout and event positioning scheme for monolithic PET detectors, based on time-over-threshold (ToT). In this case, we measure the time that the pulse is above a certain threshold through a comparator. The pulse widths are used for event positioning using a mean nearest neighbour approach (mNN ToT ). For energy determination one integrating multiplexed channel is foreseen. We evaluate the positioning accuracy and uniformity of such a ToT detector by means of Monte Carlo simulations. The impact of the threshold value is investigated and the results are compared to a detector using mean nearest neighbour with pulse-integration (mNN int ), which has already proven to allow sub-mm resolution. We show minimal degradation in spatial resolution and bias performance compared to mNN int . The highest threshold results in the worst resolution performance but degradation remains below 0.1 mm. Bias is largely constant over different thresholds for mNN ToT and close to identical to mNN int . Furthermore we show that ToT performs well in terms of detector uniformity and that scattered photons can be positioned inside the crystal with high accuracy. We conclude from this work that ToT is a valuable alternative to pulse-integration for monolithic PET detectors. This novel approach has an impact on PET detector development since it has the advantage of lower power consumption, compactness and inherent amplitude-to-time conversion.
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Liu, Yi, Xiaohui Li, Wei Wei, et al. "Threshold equalization and energy calibration of a novel multi-threshold photon counting detector." Journal of Instrumentation 20, no. 06 (2025): P06044. https://doi.org/10.1088/1748-0221/20/06/p06044.

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Abstract Photon counting detectors (PCDs) have garnered significant research attention for their application in X-ray imaging, owing to their high dynamic range, excellent counting rate capabilities, superior spatial resolution, and high detection efficiency. This study proposes a novel design of a multi-threshold PCD, which uses a 1ṁm thick cadmium telluride(CdTe) sensor with a pixel size of 150 μm× 150 μm, capable of achieving four energy thresholds. PCDs often face considerable inconsistency issues due to variations in crystal fabrication and electronic drifts. To address these challenges, this study applies the threshold equalization method to minimize pixel-to-pixel threshold dispersion, enhancing the detector's performance. Following threshold equalization, the standard deviation of the S-curve is reduced by approximately sevenfold, leading to significantly improved imaging quality. Furthermore, precise energy calibration of the thresholds is critical for the normal operation of the PCD. The energy scale of the PCD is calibrated by irradiating it with an X-ray source. The experimental results demonstrate a strong linear relationship between the global threshold of the module and incident X-ray energy, confirming the reliability of the PCD.
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Dissertations / Theses on the topic "Threshold Detector"

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Lechesa, Wahau Simon. "A variable threshold for an energy detector using GNU radio." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29862.

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Spectrum is a natural resource and should be treated as such. Spectrum has dual use applications that range from short distance communication links such as Bluetooth to health, power systems, transport, smart city applications and space communications and exploration. Next Generation Networks (NGNs) are designed to connect millions of devices seamlessly and with high throughput rates in the aforementioned sectors and others not mentioned. The use of spectrum has to be efficiently utilized and appropriated. Cognitive radio communications serve to improve use of dwindling spectrum availability. Spectrum sensing is the first and critical technology in cognitive radio meant to determine radio parameters. Energy Detection (ED) is a spectrum sensing technology that has a low computational and operational complexity, a relatively fast spectrum sensing technique to other spectrum sensing technologies, and requires no knowledge of the primary user’s transmit signal properties such as modulation or error correction schemes. In its classical case, ED compares the signal energy received with a fixed detection threshold, estimated with an expected noise level. Noise however in practice varies randomly due to thermal variations, non-uniform movement of electrons, imperfections of semiconductor materials and external noise sources to mention a few. This creates a noise uncertainty phenomenon which negatively affects the fixed threshold approach used in classical ED. Development of an out-of-tree module for a variable threshold energy detector using the estimated noise power at each sample point is presented in this dissertation. GNU Radio software and Ettus Universal Software Radio Peripheral (USRP) hardware were used to simulate the performance of the proposed variable threshold energy detector. The Neyman-Pearson theory was adopted in achieving the proposed variable threshold energy detector. The variable threshold energy detector successfully sensed the presence of a primary user signal at 1.25% less the spectrum sensing time of the constant threshold. An ROC curve plot also showed that the proposed variable threshold energy detector had a better performance in general as opposed to the constant threshold energy detector at low signal-to-noise ratio levels.
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Kusumoto, Tamon. "Radial electron fluence around ion tracks as a new physical concept for the detection threshold of PADC detector." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE046/document.

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La structure et le processus de formation des traces latentes dans le poly (allyl diglycol carbonate), PADC, ont été étudiés par spectroscopie FT-IR et par simulation Monte Carlo. La quantité de groupes OH formés est équivalente à la quantité de disparition des groupes éther. L’utilisation de radiations à faible TLE a prouvé que les fonctions carbonyle ne disparaissent que lorsque deux électrons au minimum interagissent avec une seule unité de répétition du polymère. Les résultats obtenus avec des protons de haute énergie permettent de comprendre la différence entre des traces révélables et non-révélables. Sur la base de ces résultats, un nouveau concept physique de Fluence Electronique Radiale autour de la Trace d’un Ion, défini comme la densité d'électrons secondaires qui traversent une surface cylindrique de rayon donné, est proposé pour décrire le seuil de détection du PADC en utilisant le code Geant4-DNA. Les connaissances acquises sont utiles pour trouver des agencements moléculaires appropriés pour de nouveaux détecteurs de sensibilités désirées<br>The structure and formation process of latent tracks in poly(allyl diglycol carbonate), PADC, have been examined using the combination of FT-IR spectrometry and a Monte Carlo simulation. The generation amount of OH groups is almost equivalent to the loss amount of ether. An important role of the secondary electron that the carbonyl can be broken only when more than two electrons pass through a single repeat unit is clarified by experiments using low LET radiations. Results of high energy protons lead us to the elucidation of the difference between etchable and un-etchable tracks. Based on these results, a new physical concept of Radial Electron Fluence around Ion Tracks, which is defined as the number density of secondary electron that pass through the cylinder surface with a certain radius is proposed for the detection threshold of PADC using Geant4-DNA. Obtained knowledge is helpful to find appropriate molecule arrangements for new etched track detector with desired sensitivities
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Herbach, Clauß-Michael, H. G. Ortlepp, and Wolfgang Wagner. "Decay Study of Hot Nuclei below the Multifragmentation Threshold with the FOBOS Detector at Dubna." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-30960.

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The first series of experiments at the FOBOS detector, using beams of the U-400M cyclotron of the Flerov Laboratory of Nuclear Reactions, was devoted to few-fragment decays of equilibrated systems. To exclude deep inelastic collisions or quasifission as sources of massive fragments, hot heavy nuclei were produced in the very asymmetric reactions 7Li (43 AMeV) + 232Th, 14N (34 AMeV) + 197Au, and 14N (53 AMeV) + 197Au, 232Th. Two- and three-fragment events were analysed on the base of masses and velocity vectors measured independently for each fragment. The events were sorted into excitation energy bins according to the linear momentum transfer following the massive transfer approach. Binary events were treated as fission. Fragment mass distributions as well as total kinetic energies were studied for an excitation energy range of 100 - 500 MeV. A new TKE parametrisation is proposed extending the Viola systematics to large mass asymmetries. With rising excitation energy the mass dispersion develops unexpectedly. Two new effects have been fourid and are discussed as consquences of the cooling down during the slow fission process at moderate E*, and of a strong decrease of the fission time at large E*. Ternary events were analysed by comparing measured velocity correlations with results of Coulomb trajectory simulations. If one fragment has intermediate mass (A = 10...30), two components in the relative velocities and the Z/A ratios confirm a sequential and a neck mechanism. For events with three fragments of comperable size neither the assumption of two sequential independent fission acts nor a nlultifragnlentaion-like scenario can reproduce the data. Agreement is achieved if these three-fragment decays are characterized by a collinear intermediate state followed by two scissions separated by no more than 280 fm/c, a very short time scale compared with usual saddle-to-scission intervals.
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Strekalovsky, O. V., K. D. Schilling, V. G. Tichtchenko, et al. "Decay Study of Hot Nuclei Below the Multifragmentation Threshold with the FOBOS Detector at Dubna." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-31327.

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Herbach, Clauß-Michael, H. G. Ortlepp, and Wolfgang Wagner. "Decay Study of Hot Nuclei below the Multifragmentation Threshold with the FOBOS Detector at Dubna." Forschungszentrum Rossendorf, 1997. https://hzdr.qucosa.de/id/qucosa%3A21923.

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The first series of experiments at the FOBOS detector, using beams of the U-400M cyclotron of the Flerov Laboratory of Nuclear Reactions, was devoted to few-fragment decays of equilibrated systems. To exclude deep inelastic collisions or quasifission as sources of massive fragments, hot heavy nuclei were produced in the very asymmetric reactions 7Li (43 AMeV) + 232Th, 14N (34 AMeV) + 197Au, and 14N (53 AMeV) + 197Au, 232Th. Two- and three-fragment events were analysed on the base of masses and velocity vectors measured independently for each fragment. The events were sorted into excitation energy bins according to the linear momentum transfer following the massive transfer approach. Binary events were treated as fission. Fragment mass distributions as well as total kinetic energies were studied for an excitation energy range of 100 - 500 MeV. A new TKE parametrisation is proposed extending the Viola systematics to large mass asymmetries. With rising excitation energy the mass dispersion develops unexpectedly. Two new effects have been fourid and are discussed as consquences of the cooling down during the slow fission process at moderate E*, and of a strong decrease of the fission time at large E*. Ternary events were analysed by comparing measured velocity correlations with results of Coulomb trajectory simulations. If one fragment has intermediate mass (A = 10...30), two components in the relative velocities and the Z/A ratios confirm a sequential and a neck mechanism. For events with three fragments of comperable size neither the assumption of two sequential independent fission acts nor a nlultifragnlentaion-like scenario can reproduce the data. Agreement is achieved if these three-fragment decays are characterized by a collinear intermediate state followed by two scissions separated by no more than 280 fm/c, a very short time scale compared with usual saddle-to-scission intervals.
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Strekalovsky, O. V., K. D. Schilling, V. G. Tichtchenko, et al. "Decay Study of Hot Nuclei Below the Multifragmentation Threshold with the FOBOS Detector at Dubna." Forschungszentrum Rossendorf, 1996. https://hzdr.qucosa.de/id/qucosa%3A21959.

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Wong, Winnie. "A Hybrid Pixel Detector ASIC with Energy Binning for Real-Time, Spectroscopic Dose Measurements." Doctoral thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-16171.

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Hybrid pixel detectors have been demonstrated to provide excellent quality detection of ionising photon radiation, particularly in X-ray imaging. Recently, there has been interest in developing a hybrid pixel detector specifically for photon dosimetry. This thesis is on the design, implementation, and preliminary characterisation of the Dosepix readout chip. Dosepix has 256 square pixels of 220 mm side-length, constituting 12.4 mm2 of photo-sensitive area per detector. The combination of multiple pixels provides many parallel processors with limited input flux, resulting in a radiation dose monitor which can continuously record data and provide a real-time report on personal dose equivalent. Energy measurements are obtained by measuring the time over threshold of each photon and a state machine in the pixel sorts the detected photon event into appropriate energy bins. Each pixel contains 16 digital thresholds with 16 registers to store the associated energy bins. Preliminary measurements of Dosepix chips bump bonded to silicon sensors show very promising results. The pixel has a frontend noise of 120 e-. In low power mode, each chip consumes 15 mW, permitting its use in a portable, battery-powered system. Direct time over threshold output from the hybrid pixel detector assembly reveal distinctive photo-peaks correctly identifying the nature of incident photons, and verification measurements indicate that the pixel binning state machines accurately categorise charge spectra. Personal dose equivalent reconstruction using this data has a flat response for a large range of photon energies and personal dose equivalent rates.
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Kompany, Kianoush. "Performance Evaluation of Transit Signal Priority in Multi-Directional Signal Priority Request Situations." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78271.

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Ring Barrier signal controller in VISSIM traffic simulation software provides different options for configuring Transit Signal Priority. This controller emulator allows for considering arterial progression by Priority Progression parameter; preferring specific transit signal priority calls to other calls by Priority Level feature; providing more green split to the signal priority phase by Green Extension attribute. This study aims to evaluate the impact of these three parameters on the performance of transit signal priority. The study area is based on three signalized intersections of Prices Fork Road in Blacksburg, Virginia. A total of five transit lines are assumed to request signal priority. Green Extension and Priority Level were found to have significant influence on bus delays, whereas bus frequency is not a significant variable to affect TSP effectiveness (for reducing the transit delays). This study also aims to identify the traffic conditions in which the adaptive feature of VISSIM Ring Barrier Controller can be most useful. Detector Slack, Detector Adjust Threshold, and Adjust Step are the parameters that should be hardcoded in the controller for activating the adaptiveness feature. The study area (Prices Fork Road in town of Blacksburg, VA) incorporates five bus lines are assumed eligible to request priority. This study revealed that transit service overlap can enhance or exacerbate each bus performance when transit signal priority is implemented, depending on the scheduled headways and the frequency of signal priority requests in each intersection.<br>Master of Science
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GUARISE, MARCO. "An experimental study of novel schemes for low-energy-threshold and low-background particle detection in rare gas crystals." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488080.

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There are numerous indications about possible new physics beyond the Standard Model and in particular, one of the major issues refers to the Universe composition. Indeed, the ordinary matter, which is everything we know, seems to account for only a tiny fraction of the Cosmos' mass. The unknown part of the Universe mass is the so-called dark matter which represents one of the greatest mysteries of the modern science. Experimental evidences from cosmological and astrophysical observations in many different contexts, suggest the existence of dark matter particles that interact with ordinary matter mainly under the gravitational force. However, so far, all these particles evaded the detection and a direct proof of their existence is still missing. To overcome this lack, novel complementary detection schemes are necessary to improve the actual limits and the performances of current detectors, opening thus the possibility to novel breakthrough discoveries. This dissertation focuses on a research and development study for a new category of low-energy-threshold particle detector necessary to investigate low-energy-releases within the matter such as the direct investigation of dark matter composition. In this thesis I will present two experimental schemes based on solid matrices of rare gas combined with the in-vacuum single electron detection technology. Small energy releases in unreactive materials, such as solid matrices of rare gas both pure and doped, can be probed exploiting also laser-assisted processes that up-convert the low-energy-release of the incident particle. These mechanisms should lead to a detectable electronic signal triggered by the incoming particle. In such a way, energy threshold ranging from meV to tens of eV could in principle be reached opening-up thus the possibility to probe theoretically well-motivated regions of unexplored electroweak parameter-space and thus test the existence of light dark matter candidates. The work performed during the PhD period refers to the experimental research and development phases about: the rare gas crystals growing techniques and the corresponding set-ups, the electrons' extraction from rare gas crystals to the vacuum environment, and finally the spectroscopic studies on atomic species embedded into rare gas matrices.<br>Oggigiorno, numerose prove sperimentali indicano che il Modello Standard della fisica delle particelle non sia completo, in particolare, una delle questioni più importanti riguarda la composizione dell'Universo. Infatti, la materia ordinaria, che è il costituente di tutto ciò che conosciamo, sembra essere solamente una minima frazione dell'intera massa del Cosmo stesso. La parte sconosciuta della massa dell'Universo viene indicata con il termine materia oscura e rappresenta uno dei più grandi misteri della scienza contemporanea. Le evidenze sperimentali sia su scala astrofisica sia cosmologica in contesti diversi, suggeriscono l'esistenza di particelle di materia oscura che interagiscono con la materia ordinaria mediante la forza gravitazionale. Nonostante queste osservazioni, fino ad ora, queste particelle non sono state mai misurate direttamente e quindi una prova diretta della loro esistenza tutt'ora manca. Per cercare di sopperire a questa lacuna è necessario migliorare le performance dei rivelatori attuali tramite nuovi schemi di rivelazione complementari, aprendo così la possibilità a nuove scoperte fondamentali. La presente dissertazione di dottorato si focalizza su uno studio di ricerca e sviluppo per una nuova categoria di rivelatori di particelle a bassa soglia energetica e a basso fondo. Tali approcci, necessari per investigare piccoli rilasci di energia nella materia, possono ad esempio essere applicabili allo studio della composizione particellare della materia oscura. In questa tesi verranno presentati due schemi sperimentali entrambi basati su matrici cristalline di gas rari o nobili quali neon argon kripton e xenon sia puri sia drogati con metalli alcalini o terre rare. Assieme a questi solidi, si intende sfruttare la tecnologia della rivelazione di singole cariche in vuoto che può essere ottenuta mediante strumenti quali microchannel-plate o channetron. Piccoli rilasci di energia in materiali isolanti quali solidi di gas rari sia drogati sia puri, possono infatti essere sondati da processi che sfruttano fenomeni quali la laser up-conversion per rivelare particelle debolmente interagenti. In questo modo, una soglia energetica che varia dal meV a decine di eV può essere in principio raggiunta, aprendo la possibilità all'indagine di regioni inesplorate dello spazio dei parametri dell'interazione elettrodebole, testando così l'esistenza di candidati leggeri per la materia oscura. Il lavoro che ho svolto durante il PhD riguarda la fase di ricerca e sviluppo relativa a: tecniche di crescita di cristalli di gas rari ed i relativi apparati sperimentali, l'estrazione di elettroni da questi solidi, ed infine studi spettroscopici su specie atomiche intrappolate all'interno di queste matrici cristalline.
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Park, Jongmin. "CMOS analog spectrum processing techniques for cognitive radio applications." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37230.

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The objective of the research is to develop analog spectrum processing techniques for cognitive radio (CR) applications in CMOS technology. CR systems aim to use the unoccupied spectrum allocations without any license when the primary users are not present. Therefore, the successful deployment of CR systems relies on their ability to accurately sense the spectrum usage status over a wide frequency range serving various wireless communication standards. Meanwhile, to maximize the utilization of the available spectrum segments, the bandwidth of the signal has to be highly flexible, so that even a small fraction of spectrum resources can be fully utilized by CR users. One of the key enabling technologies of variable bandwidth communication is a tunable baseband filter. In this research, a reconfigurable CR testbed system is presented as groundwork for the researches related with CR systems. With the feasibility study on the multi-resolution spectrum sensing (MRSS) functionality, a method for determining sensing threshold for MRSS functionality is presented, and a fully integrated MRSS receiver in CMOS technology is demonstrated. On the other hand, a reconfigurable CMOS analog baseband filter which can change its bandwidth, type and order with high resolution for CR applications is presented. In sum, an analog spectrum sensing method as well as a highly flexible analog baseband filter architecture is established and implemented in CMOS technology. Both designs are targeting the utilization of the analog signal processing capability with the aid of the digital circuits.
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Books on the topic "Threshold Detector"

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United States. Environmental Protection Agency. Office of Water., ed. Statistical analysis of MTBE odor detection thresholds in drinking water. U.S. Environmental Protection Agency, Office of Water, 2001.

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United States. Environmental Protection Agency. Office of Water., ed. Statistical analysis of MTBE odor detection thresholds in drinking water. U.S. Environmental Protection Agency, Office of Water, 2001.

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United States. Environmental Protection Agency. Office of Water, ed. Statistical analysis of MTBE odor detection thresholds in drinking water. U.S. Environmental Protection Agency, Office of Water, 2001.

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M, Mosher, Huff Edward M, and NASA Glenn Research Center, eds. Threshold assessment of gear diagnostic tools on flight and test rig data. National Aeronautics and Space Administration, Glenn Research Center, 2003.

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Middleton, D. First-order non-gaussian class C interference models and their associated threshold detection algorithms. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1987.

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Middleton, D. First-order non-gaussian class C interference models and their associated threshold detection algorithms. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1987.

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Middleton, D. First-order non-gaussian class C interference models and their associated threshold detection algorithms. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1987.

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Middleton, D. First-order non-gaussian class C interference models and their associated threshold detection algorithms. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1987.

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National Council on Radiation Protection and Measurements. Radiological health protection issues associated with use of active detection technology systems for detection of radioactive threat materials. National Council on Radiation Protection and Measurements, 2011.

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Lehrasab, Nadeem. A generic fault detection and isolation approach for single-throw mechanical equipment. University of Birmingham, 1999.

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Book chapters on the topic "Threshold Detector"

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Zhu, Jia, Hong song Cao, Junyi Zhang, Ze sheng Zhou, and Ziman Qi. "Novel Double Threshold Based Energy Detector for Spectrum Sensing." In Lecture Notes in Electrical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4163-6_6.

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Wu, Peixuan, Xiaoyong Du, and Weidong Hu. "Cascaded GLRT Radar/Infrared Lidar Information Fusion Algorithm for Weak Target Detection." In Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2456-9_6.

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AbstractTo deal with the problem of weak target detection, a cascaded generalized likelihood ratio test (GLRT) radar/infrared lidar heterogeneous information fusion algorithm is proposed in this paper. The algorithm makes full use of the target characteristics in microwave/infrared spectrum and the scanning efficiency of different sensors. According to the correlation of target position in the multi-sensor view field, the GLRT statistic derived from the radar measurements is compared with a lower threshold so as to generate initial candidate targets with high detection probability. Subsequently, the lidar is guided to scan the candidate regions and the final decision is made by GLRT detector to discriminate the false alarm. To get the best detection performance, the optimal detection parameters are obtained by nonlinear optimization for the cascaded GLRT Radar/Infrared lidar heterogeneous information fusion detection algorithm. Simulation results show that the cascaded GLRT heterogeneous information fusion detector comprehensively utilizes the advantages of radar and infrared lidar sensors in detection efficiency and performance, which effectively improves the detection distance upon radar weak targets within the allowable time.
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Yang, Fuzheng, Shuai Wan, and Yilin Chang. "Improved Method for Gradient-Threshold Edge Detector Based on HVS." In Computational Intelligence and Security. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11596448_157.

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Krzysztoń, Mateusz, Marcin Lew, and Michał Marks. "NAD: Machine Learning Based Component for Unknown Attack Detection in Network Traffic." In Cybersecurity of Digital Service Chains. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04036-8_4.

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AbstractDetection of unknown attacks is challenging due to the lack of exemplary attack vectors. However, previously unknown attacks are a significant danger for systems due to a lack of tools for protecting systems against them, especially in fast-evolving Internet of Things (IoT) technology. The most widely used approach for malicious behaviour of the monitored system is detecting anomalies. The vicious behaviour might result from an attack (both known and unknown) or accidental breakdown. We present a Net Anomaly Detector (NAD) system that uses one-class classification Machine Learning techniques to detect anomalies in the network traffic. The highly modular architecture allows the system to be expanded with adapters for various types of networks. We propose and discuss multiple approaches for increasing detection quality and easing the component deployment in unknown networks by known attacks emulation, exhaustive feature extraction, hyperparameter tuning, detection threshold adaptation and ensemble models strategies. Furthermore, we present both centralized and decentralized deployment schemes and present preliminary results of experiments for the TCP/IP network traffic conducted on the CIC-IDS2017 dataset.
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Maulik, Atanu. "PET: A High Threshold Nuclear Track Detector (NTD) for Rare Event Search." In Springer Proceedings in Physics. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7665-7_4.

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Durga Prasad, Ch, and Monalisa Biswal. "Optimal Threshold Identification of Fault Detector Using Teaching and Learning-Based Optimization Algorithm." In Control Applications in Modern Power System. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8815-0_29.

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Rose, Biji, and B. Aruna Devi. "Analysis of Signal Sensing with Adaptive Threshold for Energy Detector in Cognitive Radio Systems." In International Conference on Artificial Intelligence for Smart Community. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-2183-3_13.

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Birkoben, Tom, Mirko Hansen, Marina Ignatov, Martin Ziegler, and Hermann Kohlstedt. "A Bio-inspired Perceptual Decision-Making Circuit Based on the Hassenstein-Reichardt Direction Detector." In Springer Series on Bio- and Neurosystems. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-36705-2_13.

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AbstractDecision-making belongs to one of the most prominent principles in the nerve system of living species. The crucial trade-off between time to decide (speed) and accuracy is essential for a creature to react to environmental stimuli and most importantly, relevant for survival. In-depth studies of coherent motion tasks in primates, based on two-choice decision experiments, led to a profound understanding of neuronal information processing and even bridged the gap to behavioural psychology. Three fundamental processing stages are needed to successfully perform a two-choice decision experiment based on a saccadic eye movement task: the neuronal representation of the sensory signal, the integration of the incoming stimuli and the comparison of the accumulated information to a threshold for a final decision. In accordance to the results of decision-making experiments with primates, an analogue electronic decision-making circuit was developed. Our concept study includes a LED-matrix showing moving light dots (i.e. the tasks screen in primate experiments), an array of photo diodes (i.e. retina of the primate, sensory evidence), a Hassenstein-Reichardt Detector (HRD) based motion detection (i.e. a correlation-type motion detector with a high biological relevance, based on an inhibitory circuit and delay lines) and finally a signal integration circuit. The latter stage represents the decision-making unit and is realised through an inhibitory mutual coupling of the accumulated signals. The entirely analogue circuit is based on integrate and fire relaxation oscillators to mimic firing neurons. We would like to emphasise that the presented real time decision-making system is closely related to biological information pathways in nerve systems. Neither a digital computer nor programming is necessary for decision-making, which might be an interesting approach for real time data processing in autonomous robots.
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Kilim, S., M. Bielewicz, E. Strugalska-Gola, et al. "Spallation Neutron Energy Spectrum Determination with Yttrium as a Threshold Detector on U/Pb-assembly “Energy plus Transmutation”." In NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2287-5_30.

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Das, Aritra, Bhaswati Chatterjee, Sandhya Pattanayak, and Manisha Ojha. "An Improved Energy Detector for Spectrum Sensing in Cognitive Radio System with Adaptive Noise Cancellation and Adaptive Threshold." In Computational Advancement in Communication Circuits and Systems. Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2274-3_14.

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Conference papers on the topic "Threshold Detector"

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Di, Shangcheng, Shuning Zhang, and Si Chen. "Suppression of NAM Interference Based on VMD and Threshold Detection for FM Detector." In 2024 9th International Conference on Intelligent Computing and Signal Processing (ICSP). IEEE, 2024. http://dx.doi.org/10.1109/icsp62122.2024.10743844.

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Guha, Aishi, Noah A. Davis, and Brian R. La Cour. "Classical Attack on Bell Inequalities." In Quantum 2.0. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/quantum.2024.qth3a.7.

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Representing multi-mode squeezed light with a Gaussian random vector, our locally deterministic detection model challenges the CHSH game, achieving fidelities exceeding 96%. Squeezing strength, detector threshold, and efficiency influence the security of the quantum bound.
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Choi, Y., J. Jung, Y. Choi, J. H. Jung, S. Lee, and S. Jang. "Improved Event Classification of Metascintillators: An Approach Using Time-over-Threshold Analysis." In 2024 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector Conference (RTSD). IEEE, 2024. http://dx.doi.org/10.1109/nss/mic/rtsd57108.2024.10655612.

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Xu, Xinrong, Weixing Sheng, Renli Zhang, and Xiaoyu Cong. "An improved dual-threshold generalized likelihood ratio test range-spread target detector." In Third International Conference on Communications, Information System and Data Science 2024, edited by Daniele Giusto, Cheng Siong Chin, Yonghui Li, and Shensheng Tang. SPIE, 2025. https://doi.org/10.1117/12.3057716.

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Sobczak, L., A. Sari, and F. Carrel. "Toward the Detection of Prompt Neutrons from Photofission: New Developments in Threshold Activation Scintillation." In 2024 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector Conference (RTSD). IEEE, 2024. http://dx.doi.org/10.1109/nss/mic/rtsd57108.2024.10658323.

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Chen, Weiwen, Yingtie Lei, Shenghong Luo, Ziyang Zhou, Mingxian Li, and Chi-Man Pun. "ShaDocFormer: A Shadow-Attentive Threshold Detector With Cascaded Fusion Refiner for Document Shadow Removal." In 2024 International Joint Conference on Neural Networks (IJCNN). IEEE, 2024. http://dx.doi.org/10.1109/ijcnn60899.2024.10651298.

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Stewart, Monique, Edward Flynn, Hamed Pouryousef, Som P. Singh, and Anand Prabhakaran. "Analysis of Wheel Impact Load Detector (WILD) System Implementation on Metro-North Railroad." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6200.

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The Federal Railroad Administration (FRA) has partnered with Metro-North Railroad (MNR), Long Island Rail Road (LIRR) and New York &amp; Atlantic Railway (NYA) to promote operations safety through implementation of wayside detection systems and technologies. Under this partnership, opportunities were identified to enhance safety operations through the analysis of existing and planned wheel impact load detector (WILD) installations and operational procedures, including recommendations for future wayside detection systems implementations on these networks. Currently, MNR has a four-detector system operating near the Grand Central Terminal, since 2010. This paper includes an analysis of this WILD system and its impact on rolling stock maintenance. The analysis shows that the WILD system has gradually reduced the annual average number of high impact load wheels from 0.32/car in 2010 to 0.27/car in 2015. Review of data from the detectors on four tracks at the WILD site shows that train operations below a certain speed has a significant effect on the detection rate and should be a major consideration in selecting a location for WILD installation. The data show that the highest number of high impact wheels is detected in the month of November, potentially due to leaves on the rails during fall season. Our analysis shows that the currently used trigger threshold of dynamic ratio (DR)≥3 at MNR provides well-reasoned balance between the available fleet, maintenance demand and the maintenance shop capacity. At this threshold setting, the number of wheels detected per million wheel passages is quite small indicating a well maintained fleet.
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Deng, Zhenzhou, Haodi Wu, Wei Xiong, et al. "Threshold Optimization in Multi-Voltage Threshold Digitizers for TOF PET detector." In 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2017. http://dx.doi.org/10.1109/nssmic.2017.8533079.

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Shbat, Modar Safir, and Vyacheslav Tuzlukov. "Generalized Detector with Adaptive Detection threshold for radar sensors." In 2012 13th International Radar Symposium (IRS). IEEE, 2012. http://dx.doi.org/10.1109/irs.2012.6233295.

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"Optical encoding and multiplexing of detector signals with dual threshold time-over-threshold." In 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC). IEEE, 2013. http://dx.doi.org/10.1109/nssmic.2013.6829194.

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Reports on the topic "Threshold Detector"

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Morgenstern, Mark R. Four-Channel Threshold Detector With Optical Isolation. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada493243.

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Emma, Olsson. Kolinlagring med biokol : Att nyttja biokol och hydrokol som kolsänka i östra Mellansverige. Linköping University Electronic Press, 2025. https://doi.org/10.3384/9789180759496.

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Pest inventory of a field is a way of knowing when the thresholds for pest control is reached. It is of increasing interest to use machine learning to automate this process, however, many challenges arise with detection of small insects both in traps and on plants. This thesis investigates the prospects of developing an automatic warning system for notifying a user of when certain pests are detected in a trap. For this, sliding window with histogram of oriented gradients based support vector machine were implemented. Trap detection with neural network models and a check size function were tested for narrowing the detections down to pests of a certain size. The results indicates that with further refinement and more training images this approach might hold potential for fungus gnat and rape beetles. Further, this thesis also investigates detection performance of Mask R-CNN and YOLOv5 on different insects in fields for the purpose of automating the data gathering process. The models showed promise for detection of rape beetles. YOLOv5 also showed promise as a multi-class detector of different insects, where sizes ranged from small rape beetles to larger bumblebees.
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Leis and Walsh. L51575 Mechanics-Based Analysis of SCC in a Carbonate-Bicarbonate Environment. Pipeline Research Council International, Inc. (PRCI), 1988. http://dx.doi.org/10.55274/r0010306.

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Stress-corrosion cracking (SCC) occurs occasionally in line-pipe steels. Reviews of this cracking indicate that the environment is carbonate-bicarbonate and that the cracking is primarily intergranular. Research sponsored by the PRCI Line Pipe Research Supervisory Committee (LPRSC) has over the years identified metallurgical and electrochemical parameters as playing a role in the process. This work has also argued the significance of strain rate and its relationship to the service loading, given that dissolution is indicated as the controlling mechanism. While much has been learned about the mechanism of cracking, very little has been learned about how to directly relate the nucleation and growth of cracks to the loading, the metallurgy, and the environmental parameters. The continual development of new line-pipe steels, the probable development of reliable in-line inspection (ILI) tools to detect SCC, and the occasional discovery of cracking colonies during field surveys have recently centered attention on methods to rank line-pipe resistance to SCC and characterize crack-growth rates. Ranking line-pipe resistance to SCC may be done in terms of a threshold stress for nucleation of SCC or the rate of crack growth at some crack depth beyond nucleation. Estimating remaining life of cracks located by an ILI tool or confirmed in a field survey involves only crack growth rate data or data that define a threshold stress for continued growth. Recent attention of the SCC subgroup of the LPRSC, therefore, has focussed on experimental protocols to assess susceptibility, determine thresholds, and establish growth rate behavior. The tapered-tension test (TTT) has been developed to determine stress thresholds for crack nucleation, whereas several different prenotched or precracked geometries have been or are now being used to assess crack growth. Attention has also focussed on modelling SCC thresholds and crack growth behavior so that data developed under laboratory conditions can be adapted to assess field cracking situations. Models are being explored for both threshold and crack-growth conditions. This report presents the development and validation for a model that is being adapted to line-pipe problems for the SCC subgroup. This model deals with the threshold for and the growth of SCC cracks up to about 0.020-inch deep.
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Huang, Ying-Chiang. The search for neutrino oscillations in the appearance mode ημ → ηe for neutrino energies near the muon threshold [Search for neutrino oscillations using a liquid scintillator detector in a muon neutrino beam at LAMPF]. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/6236640.

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Middleton, D. ,. LLNL. Threshold detection in generalized non-additive signals and noise. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/325434.

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Chang, Han-Shu. Automatic threshold computation for traffic incident detection using INRIX. Iowa State University, 2019. http://dx.doi.org/10.31274/cc-20240624-270.

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McKinnon, Mark, Sean DeCrane, and Steve Kerber. Four Firefighters Injured in Lithium-Ion Battery Energy Storage System Explosion -- Arizona. UL Firefighter Safety Research Institute, 2020. http://dx.doi.org/10.54206/102376/tehs4612.

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On April 19, 2019, one male career Fire Captain, one male career Fire Engineer, and two male career Firefighters received serious injuries as a result of cascading thermal runaway within a 2.16 MWh lithium-ion battery energy storage system (ESS) that led to a deflagration event. The smoke detector in the ESS signaled an alarm condition at approximately 16:55 hours and discharged a total flooding clean agent suppressant (Novec 1230). The injured firefighters were members of a hazardous materials (HAZMAT) team that arrived on the scene at approximately 18:28 hours. The HAZMAT team noted low-lying white clouds of a gas/vapor mixture issuing from the structure and nearby components and drifting through the desert. The team defined a hot zone and made several entries into the hot zone to conduct 360-degree size-ups around the ESS using multi-gas meters, colorimetric tubes, and thermal imaging cameras (TICs). The team detected dangerously elevated levels of hydrogen cyanide (HCN) and carbon monoxide (CO) during each entry. The team continued to monitor the ESS and noted the white gas/vapor mixture stopped flowing out of the container at approximately 19:50 hours. The HAZMAT leadership developed an incident action plan with input from a group of senior fire officers and information about the ESS provided by representatives from the companies that owned, designed, and maintained the ESS. The HAZMAT team made a final entry into the hot zone and found that HCN and CO concentrations in the vicinity of the ESS were below an acceptable threshold. In following with the incident action plan, the team opened the door to the ESS at approximately 20:01 hours. A deflagration event was observed by the firefighters outside the hot zone at approximately 20:04 hours. All HAZMAT team members received serious injuries in the deflagration and were quickly transported to nearby hospitals. Note: The lithium-ion battery ESS involved in this incident was commissioned prior to release of a first draft of the current consensus standard on ESS installations, NFPA 855 [1]; the design of the ESS complied with the pertinent codes and standards active at the time of its commissioning.
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Fricker, Jr, Banschbach Ronald D., and David. Optimizing Biosurveillance Systems that Use Threshold-based Event Detection Methods. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada512279.

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Bussiere, Matthew, Shawn Smith, and Stephane Bussiere. DTPH56-15-T-00004 Framework for Verifying and Validating External Leak Detection Systems on Pipelines. Pipeline Research Council International, Inc. (PRCI), 2015. http://dx.doi.org/10.55274/r0011847.

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A leak detection evaluation framework has been developed for use pipe pipeline operators to identify and evaluate candidate external leak detection systems intended for possible deployment on onshore transmission pipelines and assist operators in making an informal technology selection. The framework focusses on leak detection systems that are deployed or that operate external to the pipeline. Such systems are reportedly capable of detecting small releases that fall below the detection threshold of traditional leak detection systems, such as computation pipeline monitoring systems, and can therefore serve to complement existing leak detection infrastructure by extending the overall detection range.
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Skow, Jason. PR676-233801-R02 Pipeline Reliability Thresholds. Pipeline Research Council International, Inc. (PRCI), 2024. http://dx.doi.org/10.55274/r0000095.

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Pipeline Research Council International Inc. (PRCI)'s Crack Management SRP has identified that circumferential cracking is a challenge for pipeline operating companies. The objective of PRCI NDE-4-24 was to create a framework to identify, assess and mitigate the risk due to circumferential cracking threats. Susceptibility to failure from circumferential cracking is linked to (1) circumfer-ential cracks subject to increasing axial or bending strains, or (2) growth in circumferential cracks at locations of residual strain. This project focusses on the first. No single in-line inspection (ILI) is capable of identifying circumferential cracks co-located within areas of increasing axial and bending strain. While bending strains are reliably detected with inertial mapping in-line inspection (ILI/IMU), identifying increasing strain due to subsidence or ground movement geotechnical requires separate expertise. Combining these into a framework to estimate the risk of a pipeline failure from circumferential cracks is the focus of this project. This report summarizes a methodology to develop a reliability criteria to evaluate risk for use in the PRCI NDE-4-24 circumferential crack framework. Once the risk for a given pipeline segment is estimated, the resulting values are compared to a reliability criteria to determine whether the risk is acceptable, or whether mitigating strategies must be initiated. As a result, a reliability criteria is an essential element to the framework and integrity program decision-making.
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