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Academic literature on the topic 'Hydraulic state'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Hydraulic state"

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Geelen, Caspar V. C., Doekle R. Yntema, Jaap Molenaar, and Karel J. Keesman. "Optimal Sensor Placement in Hydraulic Conduit Networks: A State-Space Approach." Water 13, no. 21 (November 4, 2021): 3105. http://dx.doi.org/10.3390/w13213105.

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Conduit bursts or leakages present an ongoing problem for hydraulic fluid transport grids, such as oil or water conduit networks. Better monitoring allows for easier identification of burst sites and faster response strategies but heavily relies on sufficient insight in the network’s dynamics, obtained from real-time flow and pressure sensor data. This paper presents a linearized state-space model of hydraulic networks suited for optimal sensor placement. Observability Gramians are used to identify the optimal sensor configuration by maximizing the output energy of network states. This approach does not rely on model simulation of hydraulic burst scenarios or on burst sensitivity matrices, but, instead, it determines optimal sensor placement solely from the model structure, taking into account the pressure dynamics and hydraulics of the network. For a good understanding of the method, it is illustrated by two small water distribution networks. The results show that the best sensor locations for these networks can be accurately determined and explained. A third example is added to demonstrate our method to a more realistic case.
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Kałaczyński, Tomasz, Valeriy Martynyuk, Juliy Boiko, Sergiy Matyukh, and Svitlana Petrashchuk. "Exploitation aspects of diagnostic hydraulic and pneumatic systems of Multimedia Hybrid Mobile Stages." MATEC Web of Conferences 332 (2021): 01022. http://dx.doi.org/10.1051/matecconf/202133201022.

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Knowledge of the technical state and construction of the hydraulic and pneumatic control system of Multimedia Hybrid Mobile Stage HMSM allows you to identify hazards and make a risk assessment. The aspects of the algorithmic process of diagnosing pneumatic and hydraulic control systems presented in the work form the basis for the development and implementation of safe solutions in the process of operation. This article describes the methodology for diagnosing HMSM machine hydraulics and industrial pneumatics systems, detailing the factors determining the correctness of maintaining functional fitness. The considerations developed illustrate the complexity of the diagnostic testing design process for condition assessment.
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Lahlou, Mouncif. "State Control for Hydraulic Power Plants." IFAC Proceedings Volumes 28, no. 26 (December 1995): 189–94. http://dx.doi.org/10.1016/s1474-6670(17)44755-0.

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Ionov, P. A., A. V. Stolyarov, and A. M. Zemskov. "Stress–Strain State of Hydraulic Drives." Russian Engineering Research 40, no. 12 (December 2020): 1078–80. http://dx.doi.org/10.3103/s1068798x20120321.

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Azzam, Israa, Keith Pate, Jose Garcia-Bravo, and Farid Breidi. "Energy Savings in Hydraulic Hybrid Transmissions through Digital Hydraulics Technology." Energies 15, no. 4 (February 13, 2022): 1348. http://dx.doi.org/10.3390/en15041348.

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Hydraulic hybrid drivetrains, which are fluid power technologies implemented in automobiles, present a popular alternative to conventional drivetrain architectures due to their high energy savings, flexibility in power transmission, and ease of operation. Hydraulic hybrid drivetrains offer multiple environmental benefits compared to other power transmission technologies. They provide heavy-duty vehicles, e.g., commercial transportation, construction equipment, wagon handling, drilling machines, and military trucks, with the potential to achieve better fuel economy and lower carbon emissions. Despite the preponderance of hydraulic hybrid transmissions, state-of-the-art hydraulic hybrid drivetrains have relatively low efficiencies, around 64% to 81%. This low efficiency is due to the utilization of conventional variable displacement pumps and motors that experience high power losses throughout the drive cycle and thus fail to maintain high operating efficiency at lower volumetric displacements. This work proposes and validates a new methodology to improve the overall efficiency of hydraulic hybrid drivetrains by replacing conventional pump/motor units with their digital counterparts. Compared to conventional pump/motors, the digital pump/motor can achieve higher overall efficiencies at a wide range of operating conditions. A proof-of-concept digital pump/motor prototype was built and tested. The experimental data were integrated into a multi-domain physics-based simulation model of a series hydraulic hybrid transmission. The proposed methodology permits enhancing the overall efficiency of a series hydraulic hybrid transmission and thus allows for energy savings. Simulating the system at moderate load-speed conditions allowed achieving a total efficiency of around 89%. Compared to the average efficiency of the series hydraulic hybrid drivetrains, our simulation results reveal that the utilization of the state-of-the-art digital pump enables improving the total efficiency of the series hydraulic hybrid drivetrain by up to 25%.
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Shcheglov, B. A., and N. A. Makhutov. "The preemergency state of a hydraulic unit." Journal of Machinery Manufacture and Reliability 39, no. 2 (April 2010): 191–96. http://dx.doi.org/10.3103/s1052618810020159.

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Wang, Jingwen, Xiangru Lv, Kuandi Zhang, Pu Li, and He Meng. "Unsteady-State Hydraulic Characteristics of Overland Flow." Journal of Hydrologic Engineering 24, no. 10 (October 2019): 04019046. http://dx.doi.org/10.1061/(asce)he.1943-5584.0001831.

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Majdan, R., Z. Tkáč, J. Kosiba, R. Abrahám, J. Jablonický, Ľ. Hujo, and M. Mojžiš. "Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear." Research in Agricultural Engineering 59, No. 3 (September 18, 2013): 75–82. http://dx.doi.org/10.17221/18/2012-rae.

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Two types of biodegradable hydraulic fluids (HEES and HEPR) with the mineral oil-based hydraulic fluid (HV) were compared. The tests were performed using a test bench. During the tests with a tractor hydraulic pump, the fluids were loaded by a cyclic pressure load. The tests of fluids were evaluated on the basis of wear of the pump. Evaluation parameters were the flow characteristics of the pump and the cleanliness level of tested fluids. The temperature of the fluid under which the test was performed was measured in real operating conditions of the Zetor Forterra 11441 tractor. It is possible to state upon the test results that the mineral oil-based fluid was classified in the first place, the biodegradable fluid of the HEPR type in the second place, and the biodegradable fluid of the HEES type received the last position.  
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Gerges, Hany, Dan Goodwin, Rob Williams, William Yu, and J. A. McCorquodale. "Developing State-of-the-Art Hydraulic Model Integrating Hydraulic Profile with Flow Distribution." Proceedings of the Water Environment Federation 2008, no. 15 (January 1, 2008): 1669–70. http://dx.doi.org/10.2175/193864708788733701.

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Guo, Xiaoniu, and Chuan-Mian Zhang. "Hydraulic Gradient Comparison Method to Estimate Aquifer Hydraulic Parameters Under Steady-State Conditions." Ground Water 38, no. 6 (November 2000): 815–26. http://dx.doi.org/10.1111/j.1745-6584.2000.tb00679.x.

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Dissertations / Theses on the topic "Hydraulic state"

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Ferroni, Paolo Ph D. Massachusetts Institute of Technology. "Steady state thermal hydraulic analysis of hydride fueled BWRs." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/41263.

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Includes bibliographical references (p. 205-208).
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.
(cont.) Since the results obtained in the main body of the analysis account only for thermal-hydraulic constraints, an estimate of the power reduction due to the application of neutronic constraints is also performed. This investigation, focused only on the "New Core" cases, is coupled with an increase of the thickness of the gap separating adjacent bundles from 2 to 5 mm. Under these more conservative conditions, the power gain percentages are lower, ranging between 24% and 43% (depending on the discharge burnup considered acceptable) for the upper pressure drop limit, and between 17% and 32% for the lower pressure drop limit.
(cont.) The benefits of the latter approach are evident since the space occupied by the bypass channel for cruciform control rod insertion becomes available for new fuel and a higher power can be achieved. The core power is constrained by applying thermal-hydraulic limits that, if exceeded, may induce failure mechanisms. These limits concern Minimum Critical Power Ratio (MCPR), core pressure drop, fuel average and centerline temperature, cladding outer temperature and flow-induced vibrations. To limit thermal-hydraulic instability phenomena, core power and coolant flow are constrained by fixing their ratio to a constant value. In particular, each BWR/5 core has been analyzed twice, each time with a different pressure drop limit: a lower limit corresponding to the pressure drop of the reference core and an upper limit 50% larger. It has been demonstrated that, in absence of neutronic constraints and with the maximum allowed pressure drop fixed at the upper limit, the implementation of the hydride fuel yields power gain percentages, with respect to oxide cores chosen as reference, of the order of 23% when its implementation is performed following the "Backfit" approach and even higher (50-70%) when greater design freedom is allowed in the core design, i.e. in the "New Core" approach. Should the maximum allowed pressure drop be fixed at the lower limit, the power gain percentage of the "Backfit" approach would decrease to 17%, while that of the "New Core" approach would remain unchanged, i.e. 50-70%.
This thesis contributes to the Hydride Fuel Project, a collaborative effort between UC Berkeley and MIT aimed at investigating the potential benefits of hydride fuel use in Light Water Reactors (LWRs). Considerable work has already been accomplished on hydride fueled Pressurized Water Reactor (PWR) cores. This thesis extends the techniques used in the PWR analysis to examine the potential power benefits resulting from the implementation of the hydride fuel in Boiling Water Reactors (BWRs). This work is the first step towards the achievement of a complete understanding of the economic implications that may derive from the use of this new fuel in BWR applications. It is a whole core steady-state analysis aimed at comparing the power performance of hydride fueled BWR cores with those of typical oxide-fueled cores, when only thermal-hydraulic constraints are applied. The integration of these results with those deriving from a transient analysis and separate neutronic and fuel performance studies will provide the data required to build a complete economic model, able to identify geometries offering the lowest cost of electricity and thus to provide a fair basis for comparing the performance of hydride and oxide fuels. Core design is accomplished for two types of reactors: one smaller, a BWR/5, which is representative of existing reactors, and one larger, the ESBWR, which represents the future generation of BWRs. For both, the core design is accomplished in two ways: a "Backfit" approach, in which the ex-bundle core structure is identical to that of the two reference oxide cores, and a "New Core" approach, in which the control rods are inserted into the bundles in the form of control fingers and the gap between adjacent bundles is fixed optimistically at 2 mm.
by Paolo Ferroni.
S.M.
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Pulitzer, Seward Webb 1974. "Feasibility assessment and design of micro hydraulic solid-state transducers." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9064.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
Includes bibliographical references (p. 179-184).
The performance of a number of mechanical applications could be greatly improved by the introduction of transducers that are capable of exploiting the inherent power densities of piezoelectric materials. The ability of these solid-state materials to exert large forces at high frequencies engenders them with specific power levels (mass normalized) that are often several orders of magnitude greater than conventional transducers, but their utility is offset by their small achievable strains. A novel concept for a device capable of improved solid-state transduction, Micro Hydraulic Solid-State Transducers (MHSTs), is introduced and explored in this thesis. The concept is comprised of two core principles: ( 1) utilization of a hydraulic system consisting of a pump, valves, and a working fluid to rectify the high frequency reciprocations of a piezoelectric drive element into unidirectional motion, and (2) performance enhancement through miniaturization. The goal is a transducer possessing high power densities that is useful in conventional applications. Feasibility of the MHST concept is evaluated by designing, modeling, and simulating a prototype mechanism. The effects of miniattariza~ion on device performance are investigated and an optimal scale is determined. Concept feasibility is based on predicted system performance, existing issues, and manufacturing constraints. It is concluded that the concept is feasible and warrants further development.
by Seward Webb Pulitzer, III.
S.M.
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Huning, Alexander. "A steady state thermal hydraulic analysis method for prismatic gas reactors." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52196.

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A new methodology for the accurate and efficient determination of steady state thermal hydraulic parameters for prismatic high temperature gas reactors is developed. Two conceptual reactor designs under investigation by the nuclear industry include the General Atomics GT-MHR and the Department of Energy MHTGR-350. Both reactors use the same hexagonal prismatic block, TRISO fuel compact, and circular coolant channel array design. Steady state temperature, pressure, and mass flow distributions are determined for the base reference designs and also for a range of values of the important parameters. Core temperature distributions are obtained with reduced computational cost over more highly detailed computational fluid dynamics codes by using efficient, correlations and first-principles-based approaches for the relevant thermal fluid and thermal transport phenomena. Full core 3-D heat conduction calculations are performed at the individual fuel pin and lattice assembly block levels. The fuel compact is treated as a homogeneous medium with heat generation. A simplified 1-D fluid model is developed to predict convective heat removal rates from solid core nodes. Downstream fluid properties are determined by performing a channel energy balance down the axial node length. Channel exit pressures are then compared and inlet mass flows are adjusted until a uniform outlet pressure is reached. Bypass gaps between assembly blocks as well as coolant channels are modeled. Finite volume discretization of energy, and momentum conservation equations are then formed and explicitly integrated in time. Iterations are performed until all local core temperatures stabilize and global convective heat removal matches heat generation. Several important observations were made based on the steady state analyses for the MHTGR and GT-MHR. Slight temperature variation in the radial direction was observed for uniform radial powers. Bottom-peaked axial power distributions had slightly higher peak temperatures but lower core average temperatures compared to top and center-peaked power distributions. The same trend appeared for large bypass gap sizes cases compared to smaller gap widths. For all cases, peak temperatures were below expected normal operational limits for TRISO fuels. Bypass gap flow for a 3 mm gap width was predicted to be between 10 and 11% for both reactor designs. Single assembly hydrodynamic and temperature results compared favorably with those available in the literature for similar prismatic HTGR thermal hydraulic, computational fluid dynamics analyses. The method developed here enables detailed local and core wide thermal analysis with minimal computational effort, enabling advanced coupled analyses of high temperature reactors with thermal feedback. The steady state numerical scheme also offers a potential for select transient scenario modeling and a wide variety of design optimization studies.
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Johnson, Jonas. "The Cardiac State Diagram : A new method for assessing cardiac mechanics." Doctoral thesis, KTH, Medicinsk avbildning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202743.

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Hernandez-Ochoa, Abel F. "Conditioning nonlocal steady-state flow on hydraulic head and conductivity through geostatistical inversion." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280279.

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Nonlocal moment equations allow one to render optimum predictions of flow in randomly heterogeneous media deterministically conditional on measured values of medium properties and to assess the corresponding predictive uncertainty. I present a geostatistical inverse algorithm for steady-state flow that makes it possible to further condition such predictions and assessments on measured values of hydraulic head and (or) flux. My algorithm is based on recursive finite-element approximations of exact first and second conditional moment equations. Computational efficiency is enhanced through the use of a direct sparse matrix solver. Hydraulic conductivity is parameterized via universal kriging based on unknown values at pilot points and (optionally) measured values at other discrete locations. Correlation among parameter estimates (or priors) is considered in the universal kriging equations. Optimum unbiased inverse estimates of natural log hydraulic conductivity, head and flux are obtained by minimizing a calibration criterion, composed of residuals of head or (and) flux and (possibly) log conductivity, using the Levenberg-Marquardt algorithm. Statistical parameters characterizing the natural variability of hydraulic conductivity can also be estimated using this algorithm. I illustrate the method for superimposed mean uniform and convergent flows in a bounded two-dimensional domain under various conditions for a range of parameters. My examples illustrate how conductivity and head data act separately or jointly to reduce parameter estimation errors and model predictive uncertainty. Over-parameterization is seen to create zones of high mean conductivity, in which flux prediction is more uncertain than is in other regions. It is found that a regular distribution of pilot points works better than does an irregular layout and that the number of pilot points should be as close as possible to the number of head data while maintaining parameters reasonably uncorrelated. Head and flux predictions are very satisfactory for cases with either log conductivity variance or integral scale between one and four, though prediction quality deteriorates with either larger variances or shorter integral scales. The method may perform satisfactorily in cases with no conductivity measurements and only a few head data.
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Sidky, M. Homayun. "Irrigation and state formation in Hunza: the cultural ecology of a hydraulic kingdom /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487854314871857.

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Andrén, Jakob. "An Overview of State-of-the-art Hydraulic Conductivity Measurements in Coarse Grained Materials." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445699.

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Embankment dams are made from soil materials of varying sizes and widely used all over the world.When constructing these, knowing the hydraulic conductivity (K) of the soil materials is a keyparameter in order to construct safe embankment dams. A knowledge gap regarding K measurementsin coarse grained soils has been identified. This thesis aims to provide a theoretical overview ofpresent day state-of-the-art methods for measuring hydraulic conductivity and the controllingcharacteristics for K. Coarse grained soils refers to a soil with the coarsest grain fraction being > 20mm and/or have a K > 10-4m/s.   It was found that the fixed wall permeameter is the most suitable laboratory method. In the field, itis possible to estimate K using tracer methods, these however show more potential for leakagepathway detection. Common for all K measurement methods are the controlling characteristics of K,grain size distribution, pore geometry, degree of compaction, particle movement and flow regime.These need to be considered when testing to produce useful measurements. If the relationshipbetween flow velocity and hydraulic head is non-linear, Darcy's law is not valid for calculating K.
Fyllnadsdammar är uppbyggda av jord och sprängsten av olika storlekar och finns över hela världen.Att känna till den hydrauliska konduktiviteten (K) av de olika lagren är viktigt för att kunna byggadessa på ett säkert och hållbart sätt. Det har identifierats en bristande kunskap angående K mätningar igrovkorniga jord- och stenmaterial. Målet med denna uppsats är att presentera en teoretisk översikt avden senaste kunskapen inom K mätningar i grovkorniga jord- och stenmaterial och vilka egenskapersom avgör ett materials K. Grovkorniga jord- och stenmaterial syftar till material där den grövstakornstorleken är > 20 mm och/eller har ett K > 10-4m/s.   För laboratorie mätningar är en permeameter med en solid vägg den mest lämpliga metoden. Förfältmätningar är det möjligt att mäta K med hjälp av spårämnen, men dessa har mer potential för attupptäcka läckage vägar i fyllnadsdammar. De faktorer som avgör ett materials K ärkornstorleksfördelningen, geometrin av porerna, graden av kompaktering, partikelrörelse ochflödestyp. För att producera mätningar som är användbara behöver dessa faktorer kontrolleras. Omsambandet mellan hydrauliskt huvud och flödeshastighet är icke linjärt kan K inte beräknas genomDarcy´s lag.
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Elsheikh, Mutasim Mohamed. "A Numerical and Experimental Investigation of Flow Induced Noise In Hydraulic Counterbalance Valves." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5683.

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The main objective of this study is to explore the complex fluid flow phenomena that result in the generation of a high frequency noise in counterbalance valves through an experimental and numerical investigation of the flow. Once the influence of the different components involved in noise generation is established, a secondary objective is the introduction of design modifications that eliminate the undesired effect without altering the operation envelope or the performance of the valve. A hydraulic test bench was used to carry out an experimental investigation of the noise generation process. A computer based data acquisition system was used to record pressure fluctuations, flowrates and hydraulic oil temperatures in a production valve under a variety of operational conditions. Extensive experimental measurements and numerical modeling lead to the hypothesis that noise generation is the result of an acoustic resonance triggered by shear layer instability at the valve inlet. The pressure gradients developed when the shear layer entrains the stagnant fluid in the valve main cavity cause the layer to become unstable and oscillate. The oscillation frequency will depend on a great number of factors such as valve geometry, pressure and velocity gradients and the density and viscosity of the fluid. It is postulated that the observed noise is generated when this frequency matches one of the resonant frequencies of the valve cavity. The proposed mechanism is theoretically poorly understood and well beyond simplified analysis, its accurate numerical simulation is computational very intensive requiring sophisticated CFD codes. The numerical investigation was carried out using STAR–CCM+, a commercially available CFD code featuring 3-D capabilities and sophisticated turbulence modeling. Streamline, pressure, velocity-vector and velocity-scalar plots were obtained for several valve configurations using steady and unsteady state flow simulations. An experimental and numerical analysis of an alternative valve geometry was carried out. Experimental results demonstrated a greatly reduced instability range. The numerical analysis of the unsteady behavior of the shear-layer streamlines for both valves yielded results that were compatible with the experimental work. The results of this investigation promise a great positive impact on the design of this type of hydraulic valves.
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Hassan, Aymane. "Handling river floating debris for dam safety – the state of the practice." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289387.

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This study reviews the current knowledge and state of the practice for handling floating debris for dam safety. This report is a guidance to improve the understanding of risks of floating debris for dam safety and of countermeasures for risk reduction. The strengths and limitations of current approaches related to dam vulnerability assessment and handling strategies are discussed and recommendations are provided. Several countries experienced issues with floating debris which often led to severe damages to  dam spillways. High and extreme flood events could be responsible for similar incidents in Sweden which requires to systematically assess dam vulnerability to floating debris and examine suitable countermeasures. A vulnerability assessment involves investigating the potential for debris production, for debris transport to the dam facility and for blockage and drawdown at spillways. Various concepts for reducing the vulnerability of dam spillways to floating debris were presented in the technical literature. Countermeasures for floating debris management based on a river perspective approach involve controlling the debris yield produced in a catchment, the interception of floating debris in tributaries and reservoirs and measures taken at dam spillways to facilitate floating debris passage. Floating debris management often requires opting for a combination of suitable and cost-efficient measures rather than a single line of defense.
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Richartz, Achim. "State of the art digital on-board-electronics vs. potentially disruptive control architectures for hydraulic valves." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71191.

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Currently discussed trends and new technologies regarding cloud or edge computing imply that even most recent designs and functionalities of digital on-board-control electronics may be outdated and eventually will totally disappear. Additionally, those new technologies attract potential users by promises like new use cases e.g. predictive maintenance or a simplified architecture and reduced installation efforts. On the other hand, automation levels and subsequent requirements are often mixed up or discussed too generally. Nevertheless, what is the rue situation today and in the upcoming years? This paper elaborates the potentials of both approaches – state of the art on-board-control electronics and potentially disruptive control architectures for hydraulic valves in order to take the right decision and reflect the pros and cons for each topology by: a) Architecture of automation: In Terms of strongly hierarchical or multidimensional connected systems. b) Requirement of installation: By reflecting the dedicated ecosystems, on levels like plant, machine, subsystems. c) Maturity of technology: Looking on the user’s perspective. d) Safety and security: From legal and conformity aspects. e) Performance needs by specific task: In comparing standard to demanding real life applications.
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Books on the topic "Hydraulic state"

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Watkins, Melanie Kueber, Brian Barkdoll, David W. Watkins, and Katelyn Zelinski. Highway Hydraulic Engineering State of Practice. Washington, D.C.: Transportation Research Board, 2020. http://dx.doi.org/10.17226/25848.

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Frankenfield, Tom. Using industrial hydraulics: A state of the art textbook from Rexroth worldwide hydraulics. 3rd ed. Cleveland, OH: Hydraulics & Pneumatics Magazine, 1990.

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Vad, János. Modelling Fluid Flow: The State of the Art. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004.

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Ocean Structural Dynamics Symposium '88 (1988 Oregon State University). Ocean Structural Dynamics Symposium '88: Proceedings : September 13-14, 1988, Oregon State University, Corvallis, Oregon. Edited by Leonard John W and O.H. Hinsdale Wave Research Laboratory. [United States: s.n., 1988.

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Irrigation and state formation in Hunza: The anthropology of a hydraulic kingdom. Lanham, Md: University Press of America, 1996.

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Sai, Joseph O. State-of-the-art field hydraulic conductivity testing of compacted soils: Project summary. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1991.

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Wyckoff, Robert M. Hydraulicking North Bloomfield and the Malakoff Diggins State Historic Park. Nevada City, Calif. U.S.A: R.M. Wyckoff, 1993.

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International Symposium on Design of Hydraulic Structures (1987 Fort Collins, Colo.). Design of hydraulic structures: Proceedings of the International Symposium on Design of Hydraulic Structures, August 24-27, 1987, Colorado State University, Fort Collins, Colorado. Fort Collins, Colo. USA: Colorado State University, 1987.

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International Editorial Committee for Book Series on Hydraulic Machinery. Inaugural Meeting. Current state of technology in hydraulic machinery: Papers presented at the Inaugural Meeting of the International Editorial Committee for Book Series on Hydraulic Machinery, held in Beijing, China in July 1986. Aldershot, Hants, England: Gower Technical, 1989.

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Mannone, F. Immobilization of tritiated waste-water by hydraulic cements: A survey of the state-of-the-art. Luxembourg: Commission of the European Communities, 1988.

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Book chapters on the topic "Hydraulic state"

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Walters, R. B. "Steady-State System Analysis." In Hydraulic and Electro-Hydraulic Control Systems, 237–41. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3840-6_27.

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Walters, R. B. "Steady-State System Analysis." In Hydraulic and Electric-Hydraulic Control Systems, 237–41. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9427-1_27.

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Mory, Mathieu. "Steady-State Hydraulic Circuits." In Fluid Mechanics for Chemical Engineering, 73–94. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118617175.ch4.

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Li, B., and Q. Chen. "Development of Robust Microvavles for Compact Robust Pumps/Hydraulic Actuators." In Solid State Phenomena, 1207–10. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-30-2.1207.

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Słowik, J. R., L. M. Kasprzyczak, and Ewald Macha. "A Digital Control System for the Hydraulic Fatigue Stand SHM 250b." In Solid State Phenomena, 39–44. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-21-3.39.

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Kasprzyczak, L. M., J. R. Słowik, and Ewald Macha. "A Computer Control System for the Hydraulic Stand MZPK 100 for Biaxial Fatigue Testing." In Solid State Phenomena, 13–18. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-21-3.13.

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Di Cristo, Cristiana. "Particle Imaging Velocimetry and Its Applications in Hydraulics: A State-of-the-Art Review." In Experimental Methods in Hydraulic Research, 49–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17475-9_3.

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Salihoglu, I., and A. K. Onur. "Water Quality Monitoring Activities of the State Hydraulic Works." In Integrated Approach to Environmental Data Management Systems, 437–48. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5616-5_36.

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Zhou, Shichang, Xinming Cao, and Guiyou Yao. "The State Variable Diagram of a Hydraulic Control System." In Systems Analysis and Simulation II, 90–93. New York, NY: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-8936-1_16.

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Sun, Guangbin, and Hong Wang. "Joint State and Parameter Estimation for a Robot Hydraulic Actuator." In Lecture Notes in Electrical Engineering, 753–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38524-7_83.

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Conference papers on the topic "Hydraulic state"

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Kalfayan, Leonard John. "Fracture Acidizing: History, Present State, and Future." In SPE Hydraulic Fracturing Technology Conference. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/106371-ms.

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Arthur, James Daniel, H. William Hochheiser, and Bobbi Jo Coughlin. "State and Federal Regulation of Hydraulic Fracturing: A Comparative Analysis." In SPE Hydraulic Fracturing Technology Conference. Society of Petroleum Engineers, 2011. http://dx.doi.org/10.2118/140482-ms.

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Burns, Thomas E., and Kevin Wiler. "Hydraulic Riveting-State of the Art Technology." In Aerofast Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/972815.

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Steyn, J. L., H. Q. Li, D. C. Roberts, K. T. Turner, O. Yaglioglu, Y. H. Su, R. Mlcak, M. A. Schmidt, S. M. Spearing, and N. W. Hagood. "Hydraulic Amplification Devices for Microscale Actuation." In 2002 Solid-State, Actuators, and Microsystems Workshop. San Diego, CA USA: Transducer Research Foundation, Inc., 2002. http://dx.doi.org/10.31438/trf.hh2002.13.

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Valko, P. P., and S. Amini. "The Method of Distributed Volumetric Sources for Calculating the Transient and Pseudosteady-State Productivity of Complex Well-Fracture Configurations." In SPE Hydraulic Fracturing Technology Conference. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/106279-ms.

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Cipolla, C. L., and C. A. Wright. "State-of-the-Art in Hydraulic Fracture Diagnostics." In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers, 2000. http://dx.doi.org/10.2118/64434-ms.

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Cai, Wei, Yongchao Xiao, and Xianxiang Huang. "Wireless sensor network for hydraulic system state monitoring." In Instruments (ICEMI). IEEE, 2009. http://dx.doi.org/10.1109/icemi.2009.5274388.

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Guo, Qian, Xinglin Tong, Chengwei Deng, Cui Zhang, Di Huang, Liang Chen, and Jiaguo Xiong. "Visualization of coke state in hydraulic decoking process." In SPIE Commercial + Scientific Sensing and Imaging, edited by Nibir K. Dhar and Achyut K. Dutta. SPIE, 2016. http://dx.doi.org/10.1117/12.2223687.

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Aisopou, Angeliki, Ivan Stoianov, and Nigel Graham. "Modelling Chlorine Transport under Unsteady-State Hydraulic Conditions." In 12th Annual Conference on Water Distribution Systems Analysis (WDSA). Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41203(425)58.

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Liu Hong and Zhang Hui. "State Monitoring Technology of Advanced Aircraft Hydraulic System." In CSAA/IET International Conference on Aircraft Utility Systems (AUS 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.0307.

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Reports on the topic "Hydraulic state"

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Feldman, E. Fundamental approach to TRIGA steady-state thermal-hydraulic CHF analysis. Office of Scientific and Technical Information (OSTI), March 2008. http://dx.doi.org/10.2172/929269.

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Yoder, G. L., J. J. Carbajo, D. G. Morris, and W. R. Nelson. Update to advanced neutron source steady-state thermal-hydraulic report. Office of Scientific and Technical Information (OSTI), May 1996. http://dx.doi.org/10.2172/283708.

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Loskin, M. I., and A. I. Knysh. THE CURRENT STATE OF HYDRAULIC STRUCTURES OF YAKUTIA CENTRAL REGIONS’ AGRICULTURAL WATER SUPPLY OBJECTS (on example of the agricultural water supply hydraulic structures of the Sakha Republic State Basin Authority “Uprmeliovodkhoz”). ООО Универсальная типография «Альфа Принт», 2018. http://dx.doi.org/10.18411/loskin5.

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Vilim, R. B., and R. N. Hill. The steady-state thermal-hydraulic performance of 3500 MWth metal and oxide fueled LMRs. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/6114932.

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Ebeling, Robert, and Barry White. Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study. Engineer Research and Development Center (U.S.), March 2021. http://dx.doi.org/10.21079/11681/39881.

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This technical report documents the second of a two-phase research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates geotechnical as well as structural design limit states for design of the U.S. Army Corps of Engineers (USACE) reinforced concrete, hydraulic navigation structures. To this end, this R&D effort extends reliability procedures that have been developed for other non-USACE structural systems to encompass USACE hydraulic structures. Many of these reinforced concrete, hydraulic structures are founded on and/or retain earth or are buttressed by an earthen feature. Consequently, the design of many of these hydraulic structures involves significant soil structure interaction. Development of the required reliability and corresponding LRFD procedures has been lagging in the geotechnical topic area as compared to those for structural limit state considerations and have therefore been the focus of this second-phase R&D effort. Design of an example T-Wall hydraulic structure involves consideration of five geotechnical and structural limit states. New numerical procedures have been developed for precise multiple limit state reliability calculations and for complete LRFD analysis of this example T-Wall reinforced concrete, hydraulic structure.
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Bylsma, Wesley. Spreadsheet Accumulator Sizing for Hybrid Hydraulic Applications Using the Benedict-Webb-Rubin Equation of State. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada419344.

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Wharry, Janelle, and Won Sik Yang. Steady-State Thermal-Hydraulic Analysis and Bowing Reactivity Evaluation Methods Based on Neutron and Gamma Transport Calculations. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1493700.

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Zhang, Renduo, and David Russo. Scale-dependency and spatial variability of soil hydraulic properties. United States Department of Agriculture, November 2004. http://dx.doi.org/10.32747/2004.7587220.bard.

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Water resources assessment and protection requires quantitative descriptions of field-scale water flow and contaminant transport through the subsurface, which, in turn, require reliable information about soil hydraulic properties. However, much is still unknown concerning hydraulic properties and flow behavior in heterogeneous soils. Especially, relationships of hydraulic properties changing with measured scales are poorly understood. Soil hydraulic properties are usually measured at a small scale and used for quantifying flow and transport in large scales, which causes misleading results. Therefore, determination of scale-dependent and spatial variability of soil hydraulic properties provides the essential information for quantifying water flow and chemical transport through the subsurface, which are the key processes for detection of potential agricultural/industrial contaminants, reduction of agricultural chemical movement, improvement of soil and water quality, and increase of agricultural productivity. The original research objectives of this project were: 1. to measure soil hydraulic properties at different locations and different scales at large fields; 2. to develop scale-dependent relationships of soil hydraulic properties; and 3. to determine spatial variability and heterogeneity of soil hydraulic properties as a function of measurement scales. The US investigators conducted field and lab experiments to measure soil hydraulic properties at different locations and different scales. Based on the field and lab experiments, a well-structured database of soil physical and hydraulic properties was developed. The database was used to study scale-dependency, spatial variability, and heterogeneity of soil hydraulic properties. An improved method was developed for calculating hydraulic properties based on infiltration data from the disc infiltrometer. Compared with the other methods, the proposed method provided more accurate and stable estimations of the hydraulic conductivity and macroscopic capillary length, using infiltration data collected atshort experiment periods. We also developed scale-dependent relationships of soil hydraulic properties using the fractal and geostatistical characterization. The research effort of the Israeli research team concentrates on tasks along the second objective. The main accomplishment of this effort is that we succeed to derive first-order, upscaled (block effective) conductivity tensor, K'ᵢⱼ, and time-dependent dispersion tensor, D'ᵢⱼ, i,j=1,2,3, for steady-state flow in three-dimensional, partially saturated, heterogeneous formations, for length-scales comparable with those of the formation heterogeneity. Numerical simulations designed to test the applicability of the upscaling methodology to more general situations involving complex, transient flow regimes originating from periodic rain/irrigation events and water uptake by plant roots suggested that even in this complicated case, the upscaling methodology essentially compensated for the loss of sub-grid-scale variations of the velocity field caused by coarse discretization of the flow domain. These results have significant implications with respect to the development of field-scale solute transport models capable of simulating complex real-world scenarios in the subsurface, and, in turn, are essential for the assessment of the threat posed by contamination from agricultural and/or industrial sources.
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Garner, P. L. Thermal-Hydraulic Analysis of RVACS Transient in PRISM Using COMMIX-1AR: Quasi-Steady State Results After One Day. Office of Scientific and Technical Information (OSTI), October 1986. http://dx.doi.org/10.2172/1524178.

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Loskin, M. I. The state of hydraulic structures of agricultural water supply facilities of the Leno - Amginsky interfluve, built on the ice complex in a warming climate. Издат-Принт, 2018. http://dx.doi.org/10.18411/loskin1.

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