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1021
Analysis and Simulation of Shifting-impact of Transmission System of Engineering Vehicle
Published 2017-01-01“…The evaluation indexes of vehicle shift quality,including the shifting-impact,the friction work and the shifting-time are given,combining with the ZL50 loader transmission system and the changes of the shift torque of the power shift clutch in the hydraulic control,several main factors of shift quality are summarized,the impact of the evaluation index is simulated and analyzed by using Matlab/Simulink. …”
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1022
THE METHOD OF FORMING CAE MODELS ON THE EXAMPLE OF DESIGN AND TECHNOLOGICAL ELABORATION OF THE PLUNGER OF FORCED HYDROMACHINE
Published 2017-06-01“…An example of design and technological elaboration of the plunger of forced hydraulic machine is shown.…”
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1023
The Characteristic Improvement of Electromagnetic Proportional Directional Control Valve
Published 2018-01-01“…The electromagnetic proportional directional control valve is widely used in hydraulic control system and its typical faults are not enough electromagnetic force and too high temperature rise to burn out the coil. …”
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1024
Le transfert de propriété du domaine public fluvial aux collectivités en France : entre cohérence de la réforme décentralisatrice et balkanisation du cours d’eau
Published 2011-11-01“…But, even if this transfer of ownership fulfils most of the faults picked out from the first time of decentralization, the system used is deeply open to criticism, notably because it leads to a river liability “balkanisation”, which contradicts hydraulic coherence.…”
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1025
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1026
Spatial distribution and migration law of respirable dust in fully mechanized mining face
Published 2025-01-01“…The simulation results show that the particle size of dust particles on the side of the shearer is generally higher than that on the side of the hydraulic support. Considering that there is air leakage when the air flow on the support side flows towards the goaf, the carrying capacity of the air flow is weakened, and the particle size of dust particles carried is smaller; the dust generated by drum coal cutting presents two stages in the direction of the working face: the section between 70 m and 120 m from the intake airway is a “rapid descent section”, and the section between 120 m and 280 m from the intake airway is a “slow descent section”. …”
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1027
Experimental Investigation of the Deformation Characteristics of Tianjin Clays under Coupled Dynamic Stress and Seepage Fields
Published 2019-01-01“…The laboratory results show that the hydraulic conductivity (k) decreases with the increasing seepage pressure, CSR, and N, and its range is from 4.6 × 10−8 cm/s to 7.4 × 10−8 cm/s. …”
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1028
Comparative Study on Two Types of Nonpillar Mining Techniques by Roof Cutting and by Filling Artificial Materials
Published 2019-01-01“…The results indicate that the total deformation of the surrounding rock of the GERF is larger and more severe; the convergence between the roof and floor and the entry sides displacement is 885 mm and 216 mm, respectively; the hydraulic support pressure near the retained entry is larger; and the peak value is 38.7 MPa. …”
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1029
Experimental Study on the Effects of Dynamic High Water Pressure on the Deformation Characteristics of Limestone
Published 2024-12-01“…Overall, the rock strain rate showed a significant negative correlation with the external water pressure, and the rock deformation modulus showed a certain positive correlation with the external water pressure. During hydraulic loading, saturated rocks had a smaller range of variation in the strain rate and deformation modulus and were more resistant to deformation than unsaturated rocks. …”
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1030
Linear-Rotary Position Control System With Enhanced Disturbance Rejection for a Novel Total Artificial Heart
Published 2024-01-01“…Its novel, low-complexity, pulsatile pumping principle requires a specially shaped piston performing a controlled, synchronized linear-rotary motion while providing the necessary hydraulic force and torque. The machine design of the Permanent Magnet Synchronous Machine (PMSM)-based linear-rotary actuator was conducted in previous work of the authors, leading to the construction of a hardware prototype satisfying the application requirements in terms of electromechanical force, torque, power losses, and volume. …”
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1031
The Influence of Injected Fluids on Microscopic Pore Structures in the Intersalt Dolomitic Shale Oil Reservoirs
Published 2019-01-01“…Given their low porosity and permeability, intersalt dolomitic shale oil reservoirs need to be developed via large-scale hydraulic fracturing to achieve economic effects. However, various lithologies and salt materials make these reservoirs vulnerable to salt mineral dissolution and recrystallization and salt plugging during development. …”
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1032
Pollutant removal by Canna Generalis in tropical constructed wetlands for domestic wastewater treatment
Published 2019-07-01“…The BOD<sub>5</sub>, TSS, NH<sub>4</sub>-N and PO<sub>4</sub>-P removal efficiencies averaged 81%, 85%, 93% and 77%, respectively for the hybrid horizontal subsurface flow constructed wetlands system operated at a hydraulic loading rate of 0.075 m/day, while they were 89%, 97%, 97%, and 68%, respectively for the hybrid free water sub-surface constructed wetlands system operated at a hydraulic loading rate of 0.1 m/day. …”
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1033
Les aqueducs romains de Lyon et d’ailleurs : nouveaux repères
Published 2023-12-01“…“Construction works” draws contributions from new obervations at different scales: the design of a new section of aqueduct, the organisation of construction sites and the supply of materials, the building of a canal from the foundations upwards, the handling of factors that impact water flow. Advanced hydraulic engineering such as siphons and some dropshafts or hydraulic jumps are also covered.The “dating” category is the focus of multiple questions as it brings into play a first of politics, large-scale investment and urban amenities. …”
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1034
Disaster Control of Roof Falling in Deep Coal Mine Roadway Subjected to High Abutment Pressure
Published 2021-01-01“…The support length of the belt roadway should be at least 57.7 m, with 0-30 m away from the coalface supported by hydraulic supports and 32-57.7 m supported by single props. …”
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1035
Effective Stress Factor Analysis of Proppant for Multi-stage Fracturing in Horizontal Wells
Published 2022-01-01“…In order to determine the effective stress factor of proppants during the multi-stage hydraulic fracturing operation in horizontal wells and select the appropriate proppant type, the analysis of the effective stress characteristics of proppants is carried out. …”
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1036
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1037
Abrasion resistant characteristics of UHPC based on high-speed underwater method: Efficiency, process, evaluation, and mechanisms
Published 2025-01-01“…Abrasion damage is a major cause of reduced service life in hydraulic structures such as bridge piers, dams, and hydroelectric stations. …”
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1038
Do land models miss key soil hydrological processes controlling soil moisture memory?
Published 2025-01-01“…We suggest that LSMs for use in seasonal-to-subseasonal climate prediction should, at least, adopt the Van Genuchten hydraulic scheme.</p>…”
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1039
Failure of cargo aileron’s actuator
Published 2014-10-01“…During a ferry flight, in a standard operation condition and at cruising level, a military cargo experienced a double hydraulic system failure due to a structural damage of the dual booster actuator. …”
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1040
Impact fracturing of rock-like material using carbon dioxide under different temperatures and pressures
Published 2025-01-01“…Unconventional resources (oil, gas, and geothermal) are often buried deep underground within dense rock strata and complex geological structures, making it increasingly difficult to create volumetric fractures through conventional hydraulic fracturing. This paper introduces a novel method of supercritical energetic fluid thermal shock fracturing. …”
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