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Literatura académica sobre el tema "Serious Irregularity"

Autor: Grafiati

Publicado: 11 de marzo de 2023

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Artículos de revistas sobre el tema "Serious Irregularity"

Chen, Di Lai, Jian Xin Liu, Kai Jun Du y Yan Wang. "Analysis of the Deterioration of Harmonic Local Irregularity on Locomotive Wheel-Rail Vertical Force". Applied Mechanics and Materials 684 (octubre de 2014): 137–44. http://dx.doi.org/10.4028/www.scientific.net/amm.684.137.

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By the MATLAB software the article simulated the local irregularity, the new harmonic excitation superimposed on the initial harmonic to simulate track settlement deterioration, the new uplift excitation superimposed on the initial harmonic to simulate track raised deterioration, as the locomotive model external excitation, using the SIMPACK multi-body dynamics simulation software to analyze the influences of the deterioration of harmonic local irregularity on locomotive wheel-rail vertical force, on the basis of the locomotive wheel-rail interaction dynamics index by the locomotive vehicle dynamics theory. The simulation results show that when the deterioration of harmonic local irregularity occurs, even if the amplitude of deterioration is small, which will cause serious deterioration of wheel-rail dynamic response and strong shock and vibration of wheel-rail .The larger amplitude of harmonic local irregularity, the greater of the maximum wheel-rail vertical force. When deterioration of the amplitude exceeds a certain value, the maximum of the wheel-rail vertical force exceedes the limit, which will cause derailment. The wheel-rail dynamic interaction increases with the speed increasing. At the same speed (such as 120km/h), harmonic local irregularity settlement deterioration compareing to harmonic local irregularity raised deterioration, the maximum of the wheel-rail vertical force increases 14.4%. Therefore, local irregularity deterioration or the speed of the locomotive should be strictly controlled.

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Meers, J. M., J. L. Bower y C. A. Alfano. "1090 Self-Reported Sleep Quality is a Robust Predictor of Depression in Women With Irregular Menstrual Cycles". Sleep 43, Supplement_1 (abril de 2020): A415. http://dx.doi.org/10.1093/sleep/zsaa056.1085.

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Abstract Introduction Menstrual cycle regularity is an important marker of women’s health. Abnormalities are associated with serious health complaints, e.g., infertility, cardiovascular, and metabolic disorders. Cycle irregularity is also linked to depression, anxiety and poor quality sleep. In fact, poor sleep and circadian misalignment may precede menstrual irregularity for some. This study describes sleep and affective characteristics of women with menstrual cycle irregularity compared to regularly cycling women and examined the individual contributions of sleep and menstrual regularity to affective symptoms. Methods N=314 (Mage=20.95, SD=2.35) women provided reports of menstrual health characteristics (frequency, duration, related symptoms), sleep over the past month (Pittsburgh Sleep Quality Index; PSQI) and on the previous night, as well as mood (Center for Epidemiologic Studies Depression Scale) and anxiety (State Trait Anxiety Inventory) symptoms. Results Among the 20.4% (n=64) of women who endorsed “always irregular” periods, mean cycle length (m=31.33 days, sd=8.5) was significantly greater than among women more regular periods (m= 27.93, sd=3.83, t(55.37)=-2.78, p=.007). This subgroup also reported higher PSQI scores (t(181)=-2.56, p=.011), longer SOL (t(282)=-3.00, p=.003), poorer sleep quality overall (t(299)=-2.35, p=.02), and poorer sleep quality on the previous night (t(300)=2.70, p=.007). Irregular cyclers reported significantly more depressive (t(284)=-2.18, p=.03) but not anxiety symptoms. When sleep and menstrual irregularity were entered into a hierarchical linear regression to examine their relative influence on depressive symptoms (F[2,174]=13.15, p<.001, R2=.13), sleep remained the only significant predictor (b= 1.13, p <.001) and menstrual cycle effects were no longer significant. Conclusion In line with previous studies, cycle irregularity was associated with poorer sleep quality and depressive symptoms. Sleep quality was found to be a more robust predictor of depression than menstrual cycle irregularity, suggesting that sleep may underlie the affective disturbances in women with more irregular menstrual cycles. Support n/a

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Khan, Suliman, Pengfei Duan, Lunguang Yao y Hongwei Hou. "Shiftwork-Mediated Disruptions of Circadian Rhythms and Sleep Homeostasis Cause Serious Health Problems". International Journal of Genomics 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/8576890.

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Shiftwork became common during the last few decades with the growing demands of human life. Despite the social inactivity and irregularity in habits, working in continuous irregular shifts causes serious health issues including sleep disorders, psychiatric disorders, cancer, and metabolic disorders. These health problems arise due to the disruption in circadian clock system, which is associated with alterations in genetic expressions. Alteration in clock controlling genes further affects genes linked with disorders including major depression disorder, bipolar disorder, phase delay and phase advance sleep syndromes, breast cancer, and colon cancer. A diverse research work is needed focusing on broad spectrum changes caused by jet lag in brain and neuronal system. This review is an attempt to motivate the researchers to conduct advanced studies in this area to identify the risk factors and mechanisms. Its goal is extended to make the shift workers aware about the risks associated with shiftwork.

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Rungraengwajiake, Sarawoot y Pornchai Supnithi. "3-D Ionospheric Plasma Bubble Model for Ground-Based Augmentation System". Applied Mechanics and Materials 781 (agosto de 2015): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.781.102.

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The ground-based augmentation system (GBAS) is now an important system for assisting the global navigation satellite system (GNSS) based aircraft navigation during landing phases. Since the ionospheric irregularity is one of the most serious problem in the high-precision GBAS, the impacts of ionospheric irregularities to GBAS in many countries need to be studied before actual installation and operation. However, most of previous studies are based on the rare ionospheric storm events observed in US in the mid-latitude region. For Thailand, which is located in equatorial and low-latitude region, the ionospheric irregularity known as plasma bubble is a common phenomenon after sunset, considered to have adverse impact to the integrity of GBAS operation. In this paper, we propose a simple 3-D ionospheric plasma bubble model for studying its impacts on GBAS operation in Thailand. The background electron density generated by the NeQuick2 model combined with the rectangular depletion are used in the near real-time simulation.

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Zhai, Mingda, Zhiqiang Long y Xiaolong Li. "A New Strategy for Improving the Tracking Performance of Magnetic Levitation System in Maglev Train". Symmetry 11, n.º 8 (16 de agosto de 2019): 1053. http://dx.doi.org/10.3390/sym11081053.

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The maglev train is a whole new method of transportation without wheels, consisting of 20 groups of symmetry suspension units. The magnetic levitation system plays a major role in suspending the maglev train stably and following the track quickly with the desired gap. However, vertical track irregularity in the maglev train line has a dreadful effect on the tracking performance of the magnetic levitation system. The investigations carried out by our team have revealed that the fluctuation of the suspension gap becomes more and more serious with increases in running speed. In this paper, a mathematical model with consideration of vertical track irregularity is established. In order to overcome and suppress the fluctuation of the suspension gap, we propose a new strategy which includes installing an accelerometer on the electromagnet to address this problem. This strategy has already been successfully implemented and applied to the suspension controller for a magnetic levitation system in the Changsha maglev express. Real operation data indicates the tracking performance of the magnetic levitation system was obviously improved.

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Yu, Wenwei, Keigo Nakahata, Guang Hao Sun, Akio Namiki, Sayuri Suwa, Mayuko Tsujimura, Le Xie, Jinwu Wang y Shao Ying Huang. "Efficient Active Sensing with Categorized Further Explorations for a Home Behavior-Monitoring Robot". Journal of Healthcare Engineering 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/6952695.

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Mobile robotics is a potential solution to home behavior monitoring for the elderly. For a mobile robot in the real world, there are several types of uncertainties for its perceptions, such as the ambiguity between a target object and the surrounding objects and occlusions by furniture. The problem could be more serious for a home behavior-monitoring system, which aims to accurately recognize the activity of a target person, in spite of these uncertainties. It detects irregularities and categorizes situations requiring further explorations, which strategically maximize the information needed for activity recognition while minimizing the costs. Two schemes of active sensing, based on two irregularity detections, namely, heuristic-based and template-matching-based irregularity detections, were implemented and examined for body contour-based activity recognition. Their time cost and accuracy in activity recognition were evaluated through experiments in both a controlled scenario and a home living scenario. Experiment results showed that the categorized further explorations guided the robot system to sense the target person actively. As a result, with the proposed approach, the robot system has achieved higher accuracy of activity recognition.

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Srivastava, Pankaj, Neeraja Sharma y C. S. Aparna. "Fuzzy Soft System and Arrhythmia Classification". Chinese Journal of Mathematics 2014 (18 de febrero de 2014): 1–12. http://dx.doi.org/10.1155/2014/164781.

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An arrhythmia is an irregularity with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. Most arrhythmias are harmless, but some can be serious or even life threatening. The present paper deals with the classification scheme of arrhythmia commonly occurring in human beings of Southeast Asian countries. Medical knowledge used in practice has been closely studied for modelling user friendly referral system to sharpen arrhythmia diagnosis by experts and this system is tested with satisfactory factor which is measured with degree of match criterion under the domain of considered inputs and computed output.

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SADOVEI, Nicolae y Mihail CEBOTARI. "Accesul lucrătorilor migranți cu statut iregular fără forme la dreptul la muncă". Analele Universitării din București Drept 2021, n.º 2021 (2 de julio de 2021): 112–23. http://dx.doi.org/10.31178/aubd.2021.08.

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International labor migration flows include a significant number of migrant workers who for specific reasons infringe residence rules in destination countries. These persons are considered to be the most vulnerable category of migrants, being prone to serious violations of their fundamental rights. States of destination have practically universally adopted policies to restrict and control irregular migration. In this context, the objective of this article is to establish the possibility for irregular migrant workers to benefit from the rights and results of their work, and to establish the limits and prohibitions that arise in the event of irregularity. The article examines both the international instruments and practice as well as regional and national approaches used by states in this field.

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Morsy, A. M., H. H. Zaher, M. H. Hassan y A. Shouman. "Predictors of treatment failure among tuberculosis patients under DOTS strategy in Egypt". Eastern Mediterranean Health Journal 9, n.º 4 (21 de septiembre de 2003): 689–701. http://dx.doi.org/10.26719/2003.9.4.618.

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Treatment failure is a serious problem facing some national tuberculosis [TB] control programmes. Irregularity of treatment is a factor that can lead to treatment failure. A case-control study was carried out in TB centres in Egypt during April 2001-December 2002 aimed at investigating the predictors of treatment failure. We interviewed 119 people with treatment failure and an equal number of cured cases [controls] and their families regarding sociodemographic characteristics, information about TB, information about drugs, treatment compliance, family support and patient-family interaction. Significant risk factors for treatment failure were non-compliance to treatment, deficient health education to the patient, poor patient knowledge regarding the disease and diabetes mellitus as co-morbid condition

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Sharma, Pranav, Puneet Kochar, Salil Sharma y Eran Rotem. "Spontaneous Retroperitoneal Hemorrhage - A Rare Presentation of Polyarteritis Nodosa: Role of Angiography in Diagnosis and Management". American Journal of Interventional Radiology 3 (20 de febrero de 2019): 2. http://dx.doi.org/10.25259/ajir-56-2018.

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Spontaneous retroperitoneal hemorrhage (RPH) is a rare but serious complication of polyarteritis nodosa (PAN) and must be considered in patients presenting with RPH as their first presentation. Renal infarctions, liver infarctions, and ruptured microaneurysms are all complications of PAN. We present two cases presenting with abdominal and back pain. The first patient’s abdominal computed tomography (CT) scan revealed fractured right kidney with retroperitoneal pericapsular hematoma and multiple hepatic and splenic infarcts. The digital subtraction angiography (DSA) demonstrated large areas of devascularization of the right kidney and right renal arterial wall irregularity with multifocal areas of stenosis, dilatations, and microaneurysms without active extravasation of IV contrast. She was treated conservatively and started on a pulsed dose of steroids and cyclophosphamide. The second patient’s abdominal CT angiography revealed multiple visceral aneurysms and focal areas of stenosis in branches of celiac axis and superior mesentery artery without active contrast extravasation. The DSA demonstrated multifocal areas of irregularity and narrowing in celiac and intrahepatic arteries as well as a 9 mm pseudoaneurysm in the inferior pancreaticoduodenal artery which was embolized with metallic coils. PAN has a vague clinical presentation and is clinically occult. Patients may be diagnosed while getting investigated for some other causes of abdominal pain. The emergency physician and the radiologist should be aware of the findings and should be able to correlate with pathology to prevent life-threatening complications. Angiography plays a crucial role, not only in diagnosis but also in appropriate management.

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Más fuentes

Tesis sobre el tema "Serious Irregularity"

Cuevas, Tello Juan Carlos. "Estimating time delays between irregularly sampled time series". Thesis, University of Birmingham, 2007. http://etheses.bham.ac.uk//id/eprint/88/.

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The time delay estimation between time series is a real-world problem in gravitational lensing, an area of astrophysics. Lensing is the most direct method of measuring the distribution of matter, which is often dark, and the accurate measurement of time delays set the scale to measure distances over cosmological scales. For our purposes, this means that we have to estimate a time delay between two or more noisy and irregularly sampled time series. Estimations have been made using statistical methods in the astrophysics literature, such as interpolation, dispersion analysis, discrete correlation function, Gaussian processes and Bayesian method, among others. Instead, this thesis proposes a kernel-based approach to estimating the time delay, which is inspired by kernel methods in the context of statistical and machine learning. Moreover, our methodology is evolved to perform model selection, regularisation and time delay estimation globally and simultaneously. Experimental results show that this approach is one of the most accurate methods for gaps (missing data) and distinct noise levels. Results on artificial and real data are shown.

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Jorda, Oscar. "The econometrics of irregularly spaced time-series data in macroeconomic research /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1997. http://wwwlib.umi.com/cr/ucsd/fullcit?p9732718.

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Morton, Alexander Stuart. "Spectral analysis of irregularly sampled time series data using continuous time autoregressions". Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288870.

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Quarz, Volker. "Die Generierung von Fahrwegstörungen für vorgegebene Spektraldichten mit Hilfe orthogonaler Funktionen". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1099488073625-41555.

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Fahrbahnunebenheiten und Gleislagestörungen können als Repräsentanten schwach stationärer Prozesse aufgefasst werden. Die Beschreibung der Qualitätsklassen von Fahrwegen erfolgt konventionell über die Spektraldichte (Leistungsdichte). Ausgehend von der Spektraldichte-Beschreibung wird die Generierung synthetischer Fahrwegstörungen für die numerische Simulation von Fahrzeugen als Mehrkörpersystem mit den Mitteln der Fourieranalyse und mit Hilfe von Wavelets untersucht
Road unevenness and track irregularities can be considered as realisations of weakly stationary stochastic processes. A description of track quality levels is given by the (power)spectral density of the related process. Here, the synthesis of track irregularities for a given spectral density using fourier series and wavelets is considered

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Max, Lindblad. "The impact of parsing methods on recurrent neural networks applied to event-based vehicular signal data". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223966.

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This thesis examines two different approaches to parsing event-based vehicular signal data to produce input to a neural network prediction model: event parsing, where the data is kept unevenly spaced over the temporal domain, and slice parsing, where the data is made to be evenly spaced over the temporal domain instead. The dataset used as a basis for these experiments consists of a number of vehicular signal logs taken at Scania AB. Comparisons between the parsing methods have been made by first training long short-term memory (LSTM) recurrent neural networks (RNN) on each of the parsed datasets and then measuring the output error and resource costs of each such model after having validated them on a number of shared validation sets. The results from these tests clearly show that slice parsing compares favourably to event parsing.
Denna avhandling jämför två olika tillvägagångssätt vad gäller parsningen av händelsebaserad signaldata från fordon för att producera indata till en förutsägelsemodell i form av ett neuronnät, nämligen händelseparsning, där datan förblir ojämnt fördelad över tidsdomänen, och skivparsning, där datan är omgjord till att istället vara jämnt fördelad över tidsdomänen. Det dataset som används för dessa experiment är ett antal signalloggar från fordon som kommer från Scania. Jämförelser mellan parsningsmetoderna gjordes genom att först träna ett lång korttidsminne (LSTM) återkommande neuronnät (RNN) på vardera av de skapade dataseten för att sedan mäta utmatningsfelet och resurskostnader för varje modell efter att de validerats på en delad uppsättning av valideringsdata. Resultaten från dessa tester visar tydligt på att skivparsning står sig väl mot händelseparsning.

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"Modelling irregularly sampled time series : an application on Hong Kong water pollution data". Chinese University of Hong Kong, 1986. http://library.cuhk.edu.hk/record=b5885655.

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Voráčková, Andrea. "Modelování durací mezi finančními transakcemi". Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-372948.

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Libros sobre el tema "Serious Irregularity"

Huffaker, Ray, Marco Bittelli y Rodolfo Rosa. Entropy and Surrogate Testing. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198782933.003.0005.

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Reconstructing real-world system dynamics from time series data on a single variable is challenging because real-world data often exhibit a highly volatile and irregular appearance potentially driven by several diverse factors. NLTS methods help eliminate less likely drivers of dynamic irregularity. We set a benchmark for regular behavior by investigating how linear systems of ODEs are restricted to exponential and periodic dynamics, and illustrating how irregular behavior can arise if regular linear dynamics are corrupted with noise or shift over time (i.e., nonstationarity). We investigate how data can be pre-processed to control for the noise and nonstationarity potentially camouflaging nonlinear deterministic drivers of observed complexity. We can apply signal-detection methods, such as Singular Spectrum Analysis (SSA), to separate signal from noise in the data, and test the signal for nonstationarity potentially corrected with SSA. SSA measures signal strength which provides a useful initial indicator of whether we should continue searching for endogenous nonlinear drivers of complexity. We begin diagnosing deterministic structure in an isolated signal by attempting to reconstructed a shadow attractor. Finally, we use the classic Lorenz equations to illustrate how a deterministic nonlinear system of ODEs with at least three equations can generate observed irregular dynamics endogenously without aid of exogenous shocks or nonstationary dynamics.

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Capítulos de libros sobre el tema "Serious Irregularity"

Triandafyllidou, Anna y Laura Bartolini. "Understanding Irregularity". En IMISCOE Research Series, 11–31. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34324-8_2.

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Schweitzer, Reinhard. "Migrant Irregularity in Britain and Spain, London and Barcelona". En IMISCOE Research Series, 57–86. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_4.

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AbstractThis chapter provides the necessary context for my comparative analysis. It first discusses the distinctive roles that the most common (state) responses to migrant irregularity – deportation, regularisation and internal control – are playing in the UK and Spain. Then it looks at more localised responses to migrant irregularity and its control that can be identified at the level of cities (and specifically in London and Barcelona) and in relation to the British and Spanish welfare systems.

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Schweitzer, Reinhard. "Research Design, Cases and Methodology". En IMISCOE Research Series, 47–56. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_3.

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AbstractThis chapter briefly describes my double-comarative research design and methodological approach and disusses the main challenges and necessary ethical considerations for researching migrant irregularity.

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Schweitzer, Reinhard. "Managing Irregularity Through the Provision of Public Education". En IMISCOE Research Series, 121–54. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_6.

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AbstractThis chapter applies the conceptual and analytical frameworks to the institutional sphere of education and thereby draws systematic comparisons between the two national and local contexts. First, I closely examine the relevant laws and policies enacted at various administrative levels as well as local implementation practices, by drawing on relevant documents and the original accounts of my interview respondents. This allows me to map the various ethical concerns, practical difficulties and organisational conflicts that either migrant irregularity itself, or the internalisation of its control, creates for individuals and the institutions they work for. At the end of the chapter, and with the help of my analytical framework, I summarise the main differences between the two contexts in terms of how they position the various categories of workers in relation to migrant irregularity and its control.

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Schweitzer, Reinhard. "Managing Irregularity Through the Provision of Public Healthcare". En IMISCOE Research Series, 87–120. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_5.

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AbstractThis chapter applies the conceptual and analytical frameworks to the institutional sphere of healthcare and thereby draws systematic comparisons between the two national and local contexts. First, I closely examine the relevant laws and policies enacted at various administrative levels as well as local implementation practices, by drawing on relevant documents and the original accounts of my interview respondents. This allows me to map the various ethical concerns, practical difficulties and organisational conflicts that either migrant irregularity itself, or the internalisation of its control, creates for individual healthcare workers and the institutions they work for. At the end of the chapter, and with the help of my analytical framework, I summarise the main differences between the two contexts in terms of how they position the various categories of workers in relation to migrant irregularity and its control.

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Schweitzer, Reinhard. "Managing Irregularity Through the Provision of Social Assistance". En IMISCOE Research Series, 155–88. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_7.

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AbstractThis chapter applies the conceptual and analytical frameworks to the institutional sphere of social assistance and thereby draws systematic comparisons between the two national and local contexts. First, I closely examine the relevant laws and policies enacted at various administrative levels as well as local implementation practices, by drawing on relevant documents and the original accounts of my interview respondents. This allows me to map the various ethical concerns, practical difficulties and organisational conflicts that either migrant irregularity itself, or the internalisation of its control, creates for individuals and the institutions they work for. At the end of the chapter, and with the help of my analytical framework, I summarise the main differences between the two contexts in terms of how they position the various categories of workers in relation to migrant irregularity and its control.

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Vickstrom, Erik R. "Correction to: Pathways and Consequences of Legal Irregularity". En IMISCOE Research Series, C1. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12088-7_7.

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Chauvin, Sébastien y Blanca Garcés-Mascareñas. "Contradictions in the Moral Economy of Migrant Irregularity". En IMISCOE Research Series, 33–49. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34324-8_3.

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Marwan, Norbert, Deniz Eroglu, Ibrahim Ozken, Thomas Stemler, Karl-Heinz Wyrwoll y Jürgen Kurths. "Regime Change Detection in Irregularly Sampled Time Series". En Advances in Nonlinear Geosciences, 357–68. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58895-7_18.

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Schweitzer, Reinhard. "The ‘Management’ of Migration – And of the Resulting Irregularities". En IMISCOE Research Series, 9–46. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91731-9_2.

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AbstractThis chapter lays out the conceptual and analytical frameworks for my analysis and embeds it in the existing literature on the internalisation of immigration control and the role of implementing actors and their everyday practices. It starts with a critical discussion of ‘migration management’ and the limits of state control over contemporary migration. After conceptualising contemporary migrant irregularity and what I call the micro-management of it, I develop the theoretical and conceptual framework of my study, which combines a critical understanding of internal bordering processes with Foucauldian conceptualisations of power and governmentality as well as crucial insights from organisation studies. At the end of the chapter I explain my analytical framework and its application in detail.

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Actas de conferencias sobre el tema "Serious Irregularity"

Abushaqra, Futoon M., Hao Xue, Yongli Ren y Flora D. Salim. "PIETS: Parallelised Irregularity Encoders for Forecasting with Heterogeneous Time-Series". En 2021 IEEE International Conference on Data Mining (ICDM). IEEE, 2021. http://dx.doi.org/10.1109/icdm51629.2021.00109.

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Li-Sheng Xu, Kuan-Quan Wang y Lu Wang. "Gaussian kernel approximate entropy algorithm for analyzing irregularity of time-series". En Proceedings of 2005 International Conference on Machine Learning and Cybernetics. IEEE, 2005. http://dx.doi.org/10.1109/icmlc.2005.1527935.

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Mimmi, G. "Experimental Investigation of Flowrate Irregularity in Rotary Gear Pumps". En ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0035.

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Abstract In a previous paper the author proposed a method to reduce the periodic variation in flow rate for an external gear pump. To verify the experimental results, a series of experimental tests on a expressly realized gear pump, was carried out. The pump was equipped with relieving grooves milled into the side plates. The tests were done on a closed piping specifically realized and equipped for measuring the instantaneous flow rate of the fluid through a wedge-shaped hot film probe.

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Fablet, R., P. Viet, R. Lguensat y B. Chapron. "Data-driven assimilation of irregularly-sampled image time series". En 2017 IEEE International Conference on Image Processing (ICIP). IEEE, 2017. http://dx.doi.org/10.1109/icip.2017.8297094.

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Yoshida, Masato, Toshihiko Hirooka, Masataka Nakazawa, Katsunori Imamura, Ryuichi Sugizaki y Takeshi Yagi. "Measurement of structural irregularity dependence on mode coupling along multi-core fiber using multi-channel OTDR system". En 2013 IEEE Photonics Society Summer Topical Meeting Series. IEEE, 2013. http://dx.doi.org/10.1109/phosst.2013.6614464.

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Liu, Zenghao, Haoran Wang, Yudong Zhang y Xingli Wang. "Deep Masking Generative Network For Irregularly Sampled Multivariate Time Series". En 2021 4th International Conference on Pattern Recognition and Artificial Intelligence (PRAI). IEEE, 2021. http://dx.doi.org/10.1109/prai53619.2021.9551049.

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Mei, Zhenning, Xian Zhao, Hongyu Chen y Wei Chen. "A Distributed Descriptor Characterizing Structural Irregularity of EEG Time Series for Epileptic Seizure Detection". En 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2018. http://dx.doi.org/10.1109/embc.2018.8512919.

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Zhao, Jiayi, Guang Xi, Zhiheng Wang y Yang Zhao. "The Unsteady Pre-Stall Behavior of the Spike-Type Rotating Stall Within an Airfoil Vaned-Diffuser". En ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76145.

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The spike-type rotating stall (RS) inception inside the vaned-diffuser, which seriously restricts the performance range and brings the problems of blade fatigue, still seems to be a ‘mystery’ since its randomness. The paper intends to explain the mechanisms of this stall inception. To quantitatively assess the critical unsteady behavior to the initiation of RS inception, the transient measurement characterizes the process falling into the RS through the parameter of ‘blade passing irregularity’. The underlying vortex disturbance, related to the growing of the flow complexity and the final spike-type precursor, is further revealed by the full-annulus simulation. The results show the propagation principle of the vortexes from the design to the stall inception point, reflected by the distribution of ‘blade passing irregularity’. The performance change of different sub-components due to the vortex behavior is presented. At the RS limit, the sudden ramp-up of the ‘blade passing irregularity’ near the leading edge (LE), accompanied with the drop of the static pressure rise in the sub-component between the semi-vaneless and throat, corresponds to the spike-type inception in the form of a clockwise vortex connecting the suction side of the diffuser vane and the pressure side of the adjacent vane. Besides, when approaching the spike-type inception point, the couple effect of the growing potential of the diffuser vane and the enhanced vortex disturbance at the impeller outlet degrades the diffuser inlet flow.

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Golovkina, A., V. Kozynchenko y N. Kulabukhova. "RECONSTRUCTION OF ORDINARY DIFFERENTIAL EQUATIONS FROM IRREGULARLY DISTRIBUTED TIME- SERIES DATA". En 9th International Conference "Distributed Computing and Grid Technologies in Science and Education". Crossref, 2021. http://dx.doi.org/10.54546/mlit.2021.83.52.001.

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The present paper aims to develop a reconstruction method for the right side of a system of ODEs inpolynomial form from sparse and irregularly distributed time-series data. This method doesn’t requireany additional knowledge about the system and has several steps. The scarcity of the data through thetrajectory length is compensated by the artificially generated points using approximatingtrigonometrical polynomials. Then, we get uniformly spread data points with the step conditioned bythe desired accuracy of derivatives approximation in ODEs. This let to further use conventionalreconstruction algorithms described in the literature. We test the proposed method on time series datagenerated from known ODE models in a two-dimensional system. We quantify the accuracy of thereconstruction for the system of ODEs as a function of the amount of data used by the method.Further, we solve the reconstructed system of ODEs and compare the solution to the original timeseries data. The method developed and validated here can now be applied to large data sets forphysical and biological systems for which there is no known system of ODEs.

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