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Littérature scientifique sur le sujet « Monitoring overhead »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 19 juillet 2025

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Articles de revues sur le sujet "Monitoring overhead"

Huang, Xiaowan, Justin Seyster, Sean Callanan, et al. "Software monitoring with controllable overhead." International Journal on Software Tools for Technology Transfer 14, no. 3 (2010): 327–47. http://dx.doi.org/10.1007/s10009-010-0184-4.

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Sugama, Yoji, Toshihide Kishi, and Nobuyuki Ishioka. "1B31 Development of an Overhead Contact Line Equipment Monitoring System(Condition Monitoring-Vehicle)." Proceedings of International Symposium on Seed-up and Service Technology for Railway and Maglev Systems : STECH 2015 (2015): _1B31–1_—_1B31–9_. http://dx.doi.org/10.1299/jsmestech.2015._1b31-1_.

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Cho, Minseon, and Donghyun Kang. "FragTracer: Real-Time Fragmentation Monitoring Tool for F2FS File System." Sensors 23, no. 9 (2023): 4488. http://dx.doi.org/10.3390/s23094488.

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Emerging hardware devices (e.g., NVMe SSD, RISC-V, etc.) open new opportunities for improving the overall performance of computer systems. In addition, the applications try to fully utilize hardware resources to keep up with those improvements. However, these trends can cause significant file system overheads (i.e., fragmentation issues). In this paper, we first study the reason for the fragmentation issues on an F2FS file system and present a new tool, called FragTracer, which helps to analyze the ratio of fragmentation in real-time. For user-friendly usage, we designed FragTracer with three main modules, monitoring, pre-processing, and visualization, which automatically runs without any user intervention. We also optimized FragTracer in terms of performance to hide its overhead in tracking and analyzing fragmentation issues on-the-fly. We evaluated FragTracer with three real-world databases on the F2FS file system, so as to study the fragmentation characteristics caused by databases, and we compared the overhead of FragTracer. Our evaluation results clearly show that the overhead of FragTracer is negligible when running on commodity computing environments.

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Dobrynin, E. V., T. V. Boshkareva, and O. V. Tabakov. "An Overhead Line Voltage Monitoring System." Russian Electrical Engineering 91, no. 3 (2020): 191–94. http://dx.doi.org/10.3103/s1068371220030074.

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Kumar, Naveen, Bruce R. Childers, and Mary Lou Soffa. "Low overhead program monitoring and profiling." ACM SIGSOFT Software Engineering Notes 31, no. 1 (2006): 28–34. http://dx.doi.org/10.1145/1108768.1108801.

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Liu, Dongbo, and Zhichao Liu. "An Adaptive Cloud Monitoring Framework Based on Sampling Frequency Adjusting." International Journal of e-Collaboration 16, no. 2 (2020): 12–26. http://dx.doi.org/10.4018/ijec.2020040102.

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In a cloud platform, the monitoring service has become a necessary infrastructure to manage resources and deliver desirable quality-of-service (QoS). Although many monitoring solutions have been proposed in recent years, how to mitigate the overhead of monitoring service is still an opening issue. This article presents an adaptive monitoring framework, in which a traffic prediction model is introduced to estimate short-term traffic overhead. Based on this prediction model, a novel algorithm is proposed to dynamically change the sampling frequency of sensors so as to achieve better tradeoffs between monitoring accuracy and overhead. Also, a monitoring topology optimization mechanism is incorporated which enables to make more cost-effective decisions on monitoring management. The proposed framework is tested in a realistic cloud and the results indicate that it can significantly reduce the communication overhead when performing monitoring tasks for multiple tenants.

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Popiolek, Pedro Freire, Karina dos Santos Machado, and Odorico Machado Mendizabal. "Low overhead performance monitoring for shared infrastructures." Expert Systems with Applications 171 (June 2021): 114558. http://dx.doi.org/10.1016/j.eswa.2020.114558.

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Hussain, T. M., T. N. Saadawi, and S. A. Ahmed. "Overhead infrared sensor for monitoring vehicular traffic." IEEE Transactions on Vehicular Technology 42, no. 4 (1993): 477–83. http://dx.doi.org/10.1109/25.260764.

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Feng, Chao, Rui Yang, Xianhui Cao, et al. "Online monitoring and early warning technology for the status of earth wire for overhead line." Journal of Physics: Conference Series 2196, no. 1 (2022): 012020. http://dx.doi.org/10.1088/1742-6596/2196/1/012020.

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Abstract Overhead lines for wind power transmission in the southern region have the characteristics of large tower-line elevation, across thick ice areas, harsh natural environments, and difficult maintenance. Unpredictable line breakage accidents often occur, affecting the stability of the social power supply. This paper designs and introduces a technology based on intelligent perception technique for online monitoring of the earth wire, which can realize long-term real-time online monitoring of the state of the earth wire of overhead lines and solve the problem of line monitoring from wind power transmission and fault inspection and troubleshooting. Now the test and monitoring work of an overhead transmission line has been completed during the ice period, and the test results show that the technology has good monitoring performance.

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Liu, Xinzhan, Zhirong Bao, Hanhui Luo, Junhui Chen та Zhongfa Zhang. "Vibration monitoring of optical fiber composited in overhead transmission line using φ-OTDR". Journal of Physics: Conference Series 2503, № 1 (2023): 012051. http://dx.doi.org/10.1088/1742-6596/2503/1/012051.

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Abstract In order to evaluate the vibration state of the overhead line, the φ-OTDR (phase-sensitive optical time-domain reflectometry) is applied to the vibration monitoring for the optical fiber composited in overhead transmission line. The principle of φ-OTDR and the IQ demodulation algorithm is introduced. Common mono-mode dark optical fiber simulates the optical fiber composited in an overhead line. The sinusoidal vibration is applied to the optical fiber using an arbitrary waveform generator and piezoelectric ceramic transducer (PZT). The vibration status in the optical fiber is measured by optical fiber vibration monitoring system using φ-OTDR. The result reveals that this system can demodulate the vibration applied to the optical fiber. This paper provides a reference for vibration monitoring optical fiber composite overhead lines.

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Thèses sur le sujet "Monitoring overhead"

Ritzmann, Deborah. "Synchrophasor-based overhead line impedance monitoring." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/74320/.

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Thermal limits of overhead transmission lines create network constraints that can result in curtailment of renewable energy generation. Thermal limits are conventionally static and based on worst-case, non-cooling ambient weather conditions, leading to under-utilization of overhead lines. Utilization can be increased and network constraints reduced by rating overhead lines dynamically, based on actual conductor temperature. Installation and maintenance of temperature and weather sensors along an overhead line is expensive and laborious. A more cost-effective solution is to derive average conductor temperature from overhead line impedance parameters, which can be calculated from measurements of electrical signals at each line end. Synchronized phasor measurement technology is becoming increasingly available in substations to capture voltage and current signals with high accuracy and reporting rates. It is known that the substation instrumentation channel can introduce significant systematic errors to the phasor measurements, which in turn cause inaccurate line impedance parameter and temperature values. This thesis presents novel methods for accurate, real-time monitoring of overhead line impedance parameters using synchronized phasor measurements that have systematic errors. In contrast to previous research, the time-variance and temperature dependence of line resistance as well as compensation of systematic errors is taken into account in the system model to increase parameter estimation accuracy. In addition, an algorithm for the selection of the best parameter estimates from different measurement sets is given. The effectiveness of the novel methods is demonstrated in several case studies on measurement data from simulations and an actual overhead line. The results show that the identified correction factors compensate systematic measurement errors, leading to a reduction in impedance parameter estimation errors of at least one order of magnitude compared to existing methods. Furthermore, the accuracy of real-time estimation of average conductor temperature was increased by at least one order of magnitude relative to previously proposed methods.

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Batty, Eric Richard. "A novel transmission line monitoring method." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326654.

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Hussin, Mohd Fahmi. "Voltage transducer for fault monitoring on high voltage overhead lines." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/65731/.

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Overhead lines are the backbone of electrical power transmission. In most cases, the overhead line provides the best economic and practical solution for energy transmission. Nevertheless, overhead lines suffer more faults due to the vulnerability of the overhead lines to adverse weather condition, transient overvoltage and falling trees. An extensive literature review of existing condition monitoring and impulse a voltage measurement technique of overhead lines are covered in this work, and ultimately leads to the development of the proposed voltage transducer. Although conventional transducers such as voltage transformers and voltage dividers are widely used for monitoring and voltage measurement, yet they have several drawbacks in terms of their size and cost. These are the key factors that limit their widespread deployment for monitoring and measuring voltage on overhead lines and, in particular, rural areas. The proposed transducer is based on a non-contact capacitive voltage probe developed at Cardiff University. However, the proposed transducer uses a high voltage conductor rather than the ground as a measurement reference. The proposed transducer is based on a cylindrical-shaped in order to avoid sharp edges, which can initiate a partial discharge effect. Commercial numerical field computation software packages are used to assist in the development of the proposed transducer for simulation of the electric field distributions around the HV conductor and the transducer. The computed electric field magnitudes obtained on the sensing probe surface are then used for calibration of the proposed transducer. The proposed transducer is developed using low cost materials and tested in a laboratory environment with a low amplitude impulse supply using a surge generator and the corresponding output voltage amplitude obtained from the transducer was validated against a low ac voltage supply using variable output voltage source. The effects of variation in the input voltage, the integrating capacitor inserted between the HV conductor and the sensing probe and height of the transducer above ground on the output voltage amplitude are also investigated. The developed transducer is subsequently tested in field experiments using test overhead lines with low and high voltage supplies. Only a single-phase measurement setup was used in this test as there is only one voltage transducer fabricated in this work. Therefore, each phase of the overhead line was tested individually. Results obtained from the laboratory and field experiments have demonstrated the suitability of the developed transducer for measuring both ac and impulse voltages, which would be useful for fault monitoring on the high voltage overhead lines. However, the computed results obtained from the simulation demonstrated the presence of end-effects at the transducer sensing probe edges. Therefore, an improved design was proposed in this work by introducing a floating electrode between the sensing probe and the guard electrode, with the aim to reduce the fringing effects by preventing the sensing probe from sensing unwanted electric field. The physical development of this improved transducer design is yet to be initiated, and is thus proposed for future work.

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Ochoa, Gallardo Ricardo. "Reducing post-silicon coverage monitoring overhead with emulation and statistical analysis." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54393.

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With increasing design complexity, post-silicon validation has become a critical problem. In pre-silicon validation, coverage is the primary metric of validation effectiveness, but in post-silicon, the lack of observability makes coverage measurement problematic. On-chip coverage monitors are a possible solution, where a coverage monitor is a hardware circuit that sets to one when the coverage event of interest occurs. However, prior research has shown that the overhead is prohibitive for anything beyond a small number of coverage monitors. In this thesis, I explore techniques that reduce the number of instrumented coverage monitors, while still being able to imply full coverage with high probability. These techniques use a deterministic forward feature selection algorithm with the objective functions based on statistical information. For gathering the required statistical information, the method relies on emulation, where all coverage monitors of interest are instrumented on a version of the design. On this emulator, such as an FPGA, I stress the design with randomly generated tests to collect the data from the instrumented coverage monitors. I propose three objective functions for the feature selection algorithm: the first estimates the probability of a coverage monitor being set during a test; the next objective function builds a Bayesian Network (BN), then takes advantage of the relationship information between nodes (coverage monitors), which the network provides; the last objective function directly estimates the conditional probability of coverage from the gathered data. I demonstrate these techniques on a non-trivial system-on-chip, by measuring the code coverage achieved after executing randomly generated test programs. Depending on the objective function, results show a 67.7% to 95.5% reduction in the number of required coverage monitors. In the ASIC implementation, this would translate into an impact of 0.33-1.96% in silicon area overhead and 0.40-2.70% in static power overhead. These results show my technique works, by proving it is possible to track a smaller number of coverage events that statistically represent the whole set.<br>Applied Science, Faculty of<br>Electrical and Computer Engineering, Department of<br>Graduate

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Habtemariam, Filmon A. "HIGH-FREQUENCY IMPEDANCE CHARACTERISTICS AND HEALTH CONDITION MONITORING OF OVERHEAD POWER LINES." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1472735633.

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Lindberg, Elisabeth. "The overhead line sag dependence on weather parameters and line current." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-168528.

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As the demand for energy increases, as well as the demand for renewable energy, Vattenfall, as network owner, receives many requests to connect new wind power to the grid. The limiting factor for how much wind power that can be connected to the grid is in this case the maximum current capacity of the overhead lines that is based on a line temperature limit. The temperature limit is set to ensure a safety distance between the lines and the ground. This master thesis project is a part of a research project at Vattenfall Research and Development that is examining the possibilities of increasing the allowed current on overhead lines in order to be able to connect more wind power to the existing network. Measured data from two overhead lines in southern Sweden is analyzed and the internal relations between the measured parameters are examined. The measured parameters are overhead line sag, line temperature, ambient temperature, solar radiation, wind speed and line current. The results indicate that there is a big load margin that could be utilized to increase the maximum current as long as further work could show that low winds at line height correlates with low wind at nacelle height. The results show that the sag versus line temperature is approximately linear within the measured temperature range. This means that a real-time-monitoring system measuring the line temperature should give adequate knowledge of the line position to ensure the safety distance. A model for the line temperature as a function of insolation, current, ambient temperature and wind speed has been estimated for one of the lines. Simulations show that a sudden increase in current at a worst-case scenario would give the operators about ten minutes to react before the line reaches the temperature limit.

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Robson, Stephen. "An integrated monitoring and communication device for use on 11 kV overhead lines." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/42930/.

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In this thesis, an integrated monitoring device for use on 11 kV overhead lines has been developed. Uniquely, the devices use an optimised form of Power Line Communication to enable a low latency communication network. It is shown that such a network is able to facilitate new and improved applications and offer tangible benefits to the network operator.

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CORNEJO, OLIVARES OSCAR EDUARDO. "In-The-Field Monitoring of Interactive Applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241251.

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Le tecniche di monitoraggio possono estrarre dati accurati sul comportamento dei sistemi software. Se utilizzati nel campo, possono rivelare come le applicazioni si comportano in contesti del mondo reale e come i programmi sono effettivamente esercitati dai loro utenti. Tuttavia, la raccolta, l'elaborazione e la distribuzione dei dati sul campo devono essere eseguiti senza interruzioni e in modo non invasivo mentre gli utenti interagiscono con le loro applicazioni. Per limitare l'intrusività del monitoraggio sul campo, un approccio comune consiste nel ridurre la quantità di dati raccolti (ad esempio, in pochi eventi e in crash dump), che tuttavia possono influire gravemente sull'efficacia delle tecniche che sfruttano i dati sul campo. Questa tesi di dottorato indaga il trade-off tra il monitoraggio sul campo e il degrado dell'esperienza utente nelle applicazioni interattive, cioè le applicazioni che richiedono input dell'utente per continuare le sue operazioni. In particolare, abbiamo identificato due grandi sfide: capire come l'utente percepisce il sovraccarico del monitoraggio e studiare come raccogliere dati in modo non intrusivo senza perdere troppe informazioni. In breve, forniamo tre contributi principali. In primo luogo, presentiamo uno studio empirico volto a quantificare se e in che misura il sovraccarico di monitoraggio introdotto in un'applicazione interattiva è percepito dagli utenti. I risultati riportati possono essere sfruttati per progettare attentamente le procedure di analisi in esecuzione sul campo. In particolare, abbiamo scoperto che gli utenti non percepivano differenze significative per un overhead dell'80% e raramente percepivano un overhead del 140%. In secondo luogo, introduciamo un framework di monitoraggio per ricavare dati a runtime completi senza influire sulla qualità dell'esperienza utente. La tecnica produce un automa a stati finiti che mostra i possibili usi dell'applicazione dagli eventi osservati sul campo. Dal modello, è anche possibile estrarre tracce accurate e complete che potrebbero essere utilizzate per supportare varie attività, come il debugging, la riproduzione e la profilazione di errori di campo. Infine, presentiamo una strategia per ridurre ulteriormente l'impatto del monitoraggio limitando l'attività svolta in parallelo con le operazioni degli utenti: la strategia ritarda il salvataggio di eventi da archiviare in fasi di inattività dell'applicazione per ridurre l'impatto sull'esperienza utente. L'approccio riduce considerevolmente l'impatto del monitoraggio sulle operazioni degli utenti producendo tracce estremamente accurate. I risultati ottenuti in questo dottorato la tesi può abilitare una serie di soluzioni di test e analisi che sfruttano in modo estensivo i dati sul campo.<br>Monitoring techniques can extract accurate data about the behavior of software systems. When used in the field, they can reveal how applications behave in real-world contexts and how programs are actually exercised by their users. However, the collection, processing, and distribution of field data must be done seamlessly and unobtrusively while users interact with their applications. To limit the intrusiveness of field monitoring a common approach is to reduce the amount of collected data (e.g., to rare events and to crash dumps), which, however, may severely affect the effectiveness of the techniques that exploit field data. This Ph.D. thesis investigates the trade-off between field monitoring and the degradation of the user experience in interactive applications, that is, applications that require user inputs to continue its operations. In particular, we identified two big challenges: to understand how the user perceives monitoring overhead and, to study how to collect data in a non-intrusive way without losing too much information. In brief, we provide three main contributions. In the first place, we present an empirical study aimed at quantifying if and to what extent the monitoring overhead introduced in an interactive application is perceived by users. The reported results can be exploited to carefully design analysis procedures running in the field. In particular, we realized that users do not perceive significant differences for an overhead of 80\% and seldom perceived an overhead of 140\%. Secondly, we introduce a monitoring framework for deriving comprehensive runtime data without affecting the quality of the user experience. The technique produces a finite state automaton that shows possible usages of the application from the events observed in the field. From the model, it is also possible to extract accurate and comprehensive traces that could be used to support various tasks, such as debugging, field failures reproduction and profiling. Finally, we present a strategy to further reduce the impact of monitoring by limiting the activity performed in parallel with users' operations: the strategy delays the saving of events to file to idle phases of the application to reduce the impact on the user experience. The approach considerably decreases the impact of monitoring on user operations producing highly accurate traces. The results obtained in this Ph.D. thesis can enable a range of testing and analysis solutions that extensively exploit field data.

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Najafi, Syed Ahmed Ali. "Energy Harvesting From Overhead Transmission Line Magnetic Fields." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548448189459464.

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Komaragiri, Shalini Sushmitha. "A SAG monitoring device based on a cluster of code-based GPS receivers : a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=0&did=2000377771&SrchMode=1&sid=2&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1277472835&clientId=28564.

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Livres sur le sujet "Monitoring overhead"

Diagnostics of Electrical Equipment Faults and Power Overhead Transmission Line Condition by Monitoring Systems: Short-Circuit Testing of Power Transformers. Nova Science Publishers, Incorporated, 2016.

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Gugerty, Mary Kay, and Dean Karlan. The Retail Donor Perspective. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199366088.003.0015.

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This chapter teases apart the information shortfalls in the philanthropy market for individual donors. Donors that want to use the CART principles to evaluate nonprofit organizations have little information to go on to do so. Few organizations put forward genuine measures of impact. And the rating information that is out there is often misleading. Retail donors are left to sway back and forth in the wake of informal impressions, nonprofit-driven public relations, isolated tales of success, and fortuitous personal connections. The chapter argues that existing nonprofit rating systems do not address the core problem since they typically focus on transparency, overhead, or other factors that may or may not be correlated to actual program impact. ImpactMatters, co-founded by Goldilocks co-author Dean Karlan, uses the CART principles to develop “impact audits” that evaluate nonprofits’ quality of impact evidence, cost to create impact, quality of monitoring systems, and extent of learning and iteration.

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Energy management: Inadequate DOE monitoring of contractors' acquisitions from affiliates : report to the Chairman, Committee on Governmental Affairs, U.S. Senate. The Office, 1994.

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Gutzeit, Joerg. Crude Unit Corrosion Guide. 3rd ed. NACE International, The Worldwide Corrosion Authority15835 Park Ten Place Houston, TX 77084, 2016. https://doi.org/10.5006/37612.

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This Guide was written for Plant Operators, Process Engineers, Metallurgists, Maintenance Engineers, Inspectors, and all others who deal with crude unit corrosion and fouling issues on a daily basis. The book is based on the author’s experience dealing with many crude units and also reflects the industry’s consensus experiences reported at past meetings of the former NACE STG34 Committee on Petroleum Refining and Gas Processing and the API Subcommittee on Corrosion and Materials. Diluent recovery units (DRUs) and vacuum distillation units (VDUs) of bitumen upgraders are now included in the discussions where appropriate. While process simulation and RBIM software has been very helpful for ranking critical components for future inspection and maintenance efforts, expertise is still required to facilitate reliable data input and assessment. This book presents the most important aspects of corrosion and fouling control in the atmospheric and vacuum sections of crude units and the corresponding sections in bitumen upgraders. Various chapters deal with metallurgy and corrosion monitoring, crude tank settling and desalting, caustic injection, preheat exchanger fouling, sulfidic and naphthenic acid corrosion in fired heaters, transfer lines, and distillation columns. Other chapters cover corrosion and fouling by inorganic and organic chlorides in the top of columns and in overhead systems and various issues with neutralizer, corrosion inhibitor, and water injection systems. Important reports, research papers, and monographs published during the past 60 years or so are cited in the text.

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Chapitres de livres sur le sujet "Monitoring overhead"

Wonisch, Daniel, Alexander Schremmer, and Heike Wehrheim. "Zero Overhead Runtime Monitoring." In Software Engineering and Formal Methods. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40561-7_17.

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Chrząszcz, Jerzy. "Zero-Overhead Monitoring of Remote Terminal Devices." In Studies in Big Data. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77604-0_8.

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Nataraj, Aroon, Matthew Sottile, Alan Morris, Allen D. Malony, and Sameer Shende. "TAUoverSupermon: Low-Overhead Online Parallel Performance Monitoring." In Euro-Par 2007 Parallel Processing. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-74466-5_11.

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Voevodin, Vadim, Konstantin Stefanov, and Sergey Zhumatiy. "Overhead Analysis for Performance Monitoring Counters Multiplexing." In Lecture Notes in Computer Science. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22941-1_34.

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Alivelu Manga, N., Surya Teja Manupati, N. S. C. Viswanadh, P. Sriram, and D. V. S. G. Varun. "Design of Progressive Monitoring Overhead Water Tank." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5936-3_25.

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Soueidi, Chukri, Antoine El-Hokayem, and Yliès Falcone. "Opportunistic Monitoring of Multithreaded Programs." In Fundamental Approaches to Software Engineering. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-30826-0_10.

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AbstractWe introduce a generic approach for monitoring multithreaded programs online leveraging existing runtime verification (RV) techniques. In our setting, monitors are deployed to monitor specific threads and only exchange information upon reaching synchronization regions defined by the program itself. They use the opportunity of a lock in the program, to evaluate information across threads. As such, we refer to this approach as opportunistic monitoring. By using the existing synchronization, our approach reduces additional overhead and interference to synchronize at the cost of adding a delay to determine the verdict. We utilize a textbook example of readers-writers to show how opportunistic monitoring is capable of expressing specifications on concurrent regions. We also present a preliminary assessment of the overhead of our approach and compare it to classical monitoring showing that it scales particularly well with the concurrency present in the program.

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Farzaneh, Masoud, and William A. Chisholm. "Systems for Monitoring and Predicting Ice Accretion and Shedding." In Techniques for Protecting Overhead Lines in Winter Conditions. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87455-1_3.

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Rezinkina, Marina M., Yevgen I. Sokol, Artur O. Zaporozhets, Oleg G. Gryb, Ihor T. Karpaliuk, and Sergiy V. Shvets. "Monitoring of Energy Objects Parameters with Using UAVs." In Control of Overhead Power Lines with Unmanned Aerial Vehicles (UAVs). Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69752-5_1.

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Halász, Balint G., Bálint Németh, Levente Rácz, Dávid Szabó, and Gábor Göcsei. "Monitoring of Actual Thermal Condition of High Voltage Overhead Lines." In IFIP Advances in Information and Communication Technology. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78574-5_25.

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Wu, Chun Wah Wallace, Deepak Kumar, Borzoo Bonakdarpour, and Sebastian Fischmeister. "Reducing Monitoring Overhead by Integrating Event- and Time-Triggered Techniques." In Runtime Verification. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40787-1_18.

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Actes de conférences sur le sujet "Monitoring overhead"

Al-Faqeer, Faisal, and Fred Addington. "Hydrogen Permeation Application to Crude Unit Overhead Corrosion Monitoring." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08548.

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Abstract Crude unit overhead corrosion has been a problem for most refineries worldwide. A number of different corrosion mechanisms can result in damage to the crude unit overhead. These mechanisms include low pH corrosion, under deposit corrosion due to salt formation in the overhead, and velocity accelerated corrosion. Hydrogen permeation has been successfully used to monitor crude unit overhead corrosion. A correlation was developed to calculate the corrosion rate based on the hydrogen monitoring technique readings. This paper will discuss the usefulness of the hydrogen permeation correlation in different crude unit overhead troubleshooting scenarios. The correlation corrosion rate showed very good agreement with corrosion rates calculated from ultrasonic thickness measurement (UT) data. In addition, a case history of using the hydrogen permeation monitoring technique to map salt formation areas in one overhead line is discussed.

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Correa, Luiz Augusto, and Milton P. Ramos. "On-Line Corrosion Control in Refinery Overhead Systems." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95336.

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Abstract Corrosion is one of the great causes of accidents and economic losses in petroleum and petrochemical industries1. Crude unit overheads are one of the most corrosion affected parts and large amounts of work and money has been spent on its control and prevention. Thus, new materials, inhibitors and monitoring techniques are constantly under testing in order to improve corrosion prevention and plant reliability. Expert Systems are a rising technology in industrial process monitoring and problem diagnosing. This sort of computer program is developed trying to simulate the human expert intelligent behavior in the task of solving a specific problem. The crude units overhead corrosion control is a hard and time consuming task that seems to be a fruitful field to expert systems application.

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Duncan, Andrew, Sarah Barr, and Kerry Spicer. "Rapid Corrosivity Evaluation of Refinery Overhead Piping by Real Time Corrosion Monitoring." In CORROSION 2006. NACE International, 2006. https://doi.org/10.5006/c2006-06328.

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Abstract This paper demonstrates that electrochemical noise data can be acquired in the nominally dry overhead lines of a debutaniser and that this data can be used to provide an insight to the corrosion activity. The paper seeks to achieve this through providing a series of examples of electrochemical noise data acquired within a debutaniser overhead line while operating under varying conditions. The study is specific to a debutanizer overhead line for which corrosion control was originally achieved through a water wash and inhibitor injection but which, overtime, led to corrosion problems in the overhead piping upstream of the condensers. After the replacement of this piping, it was decided that the system should be operated dry and that monitoring could be used to evaluate the effectiveness of this process change.

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Kasimov, Vasil A., Anna A. Granskaya, and Yuri V. Piskovatskiy. "Location Monitoring of Overhead Power Lines During Repair Work." In 2025 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). IEEE, 2025. https://doi.org/10.1109/icieam65163.2025.11028570.

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Bae, Chanbin, Kyeongtak Lee, Heewon Kim, et al. "Quantized In-band Network Telemetry for Low Bandwidth Overhead Monitoring." In 2024 20th International Conference on Network and Service Management (CNSM). IEEE, 2024. https://doi.org/10.23919/cnsm62983.2024.10814621.

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Ivchenco, Ksenia, Aleksandra V. Varganova, Mikhail S. Melnikov, and Elena S. Chizhikova. "Overhead Lines Online Monitoring Using in the Condition Power Grids." In 2025 International Russian Smart Industry Conference (SmartIndustryCon). IEEE, 2025. https://doi.org/10.1109/smartindustrycon65166.2025.10986152.

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Vicent, Ezequiel. "Improve Atmospheric Columng Overhead Corrosion Mitigation through Cloud-Based, Continuous Salt Point Corrosion Monitoring." In MECC 2023. AMPP, 2023. https://doi.org/10.5006/mecc2023-19941.

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Abstract Atmospheric Crude Unit Overheads are highly susceptible to corrosion and fouling due to the inefficient removal of chlorides in the desalter and subsequent hydrochloric acid (HCl) generation in the crude furnace. Refiners apply neutralizing amines to raise the condensed phase pH and add water wash (if an injection system exists) to wash away salts that may form and prevent corrosion. Understanding the overhead chemistry as it relates to the temperature and pressure conditions that dictate the targeted product (gasoline or diesel mode) is crucial to maintain an on-stream factor of 95% or better. Operating the overhead in ranges where an acidic ionic slurry forms (salt point corrosion) or where solid salts are allowed to form and deposit (corrosion and fouling) can lead to unexpected shutdowns. Such an unexpected shutdown may last an average of 7 to14 days, corresponding to a 4% reduction in the unit’s annual onstream factor. For a 150 kbpd unit with a crack spread of $10/bbl, this amounts to an $11MM USD to $21MM USD loss in revenue. For example, a refinery in the US [1] shut down its small CDU, which processes 80 kbpd of crude. The refinery shut down the unit on July 9, 2018 and expected the downtime to last until July 25, 2018 for a duration of 16 days and revenue loss of 12.8 MMUSD (assuming the crack spread is $10/bbl). Eliminating, mitigating, or even reducing this risk allows refiners to avoid these unplanned shutdowns and profit losses. In this paper, we discuss why deep electrolyte and ionic modeling are critical for rigorous and accurate ionic dew point and salt deposition predictions. We will discuss how the OLI’s Mixed Solvent Electrolyte (MSE) thermodynamic model, now accessible through OLI’s cloud APIs, can be adapted to automatically calculate the performance of neutralizing amines in multi-phase systems while adapting to the effects of changing operating conditions. We will also discuss how these models for continuous corrosion monitoring and mitigation will enable rapid and cost-effective response and empower operational asset management through digital transformation of this critical unit.

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Groysman, Alec, and Avihu Hiram. "Corrosion Monitoring and Control in Refinery Process Units." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97512.

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Abstract This paper describes the experience gained in "corrosion monitoring" in the overhead systems of three crude distillation units of a refinery in Haifa, Israel. The data of electrical resistance (ER) probes, connected to an on-line data acquisition system were compared with the mass loss method and chemical analysis of accumulated sour water after condensation in the overhead system. SEM & EDS analysis of films and deposits formed on the coupons showed that iron sulfide with impurities of chlorides are responsible for the corrosion extent. The corrosion was less than 5 MPY when a uniform tenacious iron sulfide films of 10-50 microns thickness were formed. The severe corrosion occurred when deposits and non-uniform films of more than 80-100 microns thickness were formed. Special attention was given to ER probes which were connected on-line to the process units and enabled the operators to react immediately to any change in corrosion rates.

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Liu, Tong, Youzhuo Zheng, Lulu Mei, Xinhao Lin, Zhuoyue Wang, and Wei Huang. "Application of Mechanical Monitoring Technology for Ice Covered Overhead Distribution Conductors." In 2024 3rd International Conference on Energy and Electrical Power Systems (ICEEPS). IEEE, 2024. http://dx.doi.org/10.1109/iceeps62542.2024.10693104.

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Wang, Zuomin, Ruiyong Zhang, and Fei Yuan. "Design on Intelligent Monitoring and Management Platform for Overhead Transmission Lines." In 2024 3rd International Conference on Smart Grids and Energy Systems (SGES). IEEE, 2024. https://doi.org/10.1109/sges63808.2024.10824076.

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Rapports d'organisations sur le sujet "Monitoring overhead"

Harkema, Marcel, Dick Quartel, Rob van der Mei, and Bart Gijsen. JPMT: A Java Performance Monitoring Tool. Centre for Telematics and Information Technology (CTIT), 2003. http://dx.doi.org/10.3990/1.5152400.

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This paper describes our Java Performance Monitoring Toolkit (JPMT), which is developed for detailed analysis of the behavior and performance of Java applications. JPMT represents internal execution behavior of Java applications by event traces, where each event represents the occurrence of some activity, such as thread creation, method invocation, and locking contention. JPMT supports event filtering during and after application execution. Each event is annotated by high-resolution performance attributes, e.g., duration of locking contention and CPU time usage by method invocations. JPMT is an open toolkit, its event trace API can be used to develop custom performance analysis applications. JPMT comes with an event trace visualizer and a command-line event trace query tool for scripting purposes. The instrumentation required for monitoring the application is added transparently to the user during run-time. Overhead is minimized by only instrumenting for events the user is interested in and by careful implementation of the instrumentation itself.

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APPLICATION OF HYDRAULIC SYNCHRONOUS LIFTING TECHNOLOGY IN THE CONSTRUCTION OF LONG-SPAN HYBRID STEEL STRUCTURES. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.070.

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The aim of this study was to solve technical problems, such as uneven structures, multiple lifting points, high accuracy control requirements, and multi-disciplinary collaborative work, in the process of lifting and hoisting long-span hybrid steel structures based on the lifting work of a steel roof and steel beams of the Hunan Radio and Television studio F. First, after conducting research on the comparison and selection of the construction scheme, lifting process, quality control and other aspects, a floor assembly + hydraulic lifting + overhead supplementary bar construction plan was proposed. The large-section steel beam and truss hybrid structure system with different bottom chord elevations was divided into two units for synchronous lifting, with weights of 715 tons and 340 tons, lifting heights of 21.5 metres and 15 metres, and a maximum span of 50.4 metres , Second, the maximum vertical displacement, maximum stress ratio of the members, lifting reaction force frame and overall stability of the hybrid structure during the lifting process were analysed, and the results showed that they all met the requirements. Finally, the monitoring data of the field construction process were in good agreement with the numerical calculation results, further verifying the rationality and feasibility of hydraulic synchronous lifting technology, which can provide guidance and a reference for the construction of similar long-span hybrid steel structures.

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