research on the new tasks and capabilities are required for ammunition in the future intelligent air combat, the concept of smart munitions is put forward, and the intelligent development approaches of single equipmen...
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Wind forces acting on high-rise buildings are usually evaluated from wind tunnel tests. With recent improvements in computational capabilities, wind forces can also be evaluated from computational fluid dynamics (CFD)...
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The finite element method provides feasibility for the analysis of complex structures, specifically for helical wire rope structures like radial tire cords. For models with specific pitch length and rotation radius, i...
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A novel control scheme is presented to eliminate the negative effects of communication disturbances,which introduces active disturbance rejection control(ADRC)in the control strategy design to achieve the objectives o...
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A novel control scheme is presented to eliminate the negative effects of communication disturbances,which introduces active disturbance rejection control(ADRC)in the control strategy design to achieve the objectives of the restoration of the bus voltage and the sharing of the power even in the presence of disturbances and delays in ***,its dynamic disturbance decoupling feature is used to realise the decoupling between power and voltage,so that the proposed controller only exchanges power information with its neighbours,reducing the communication burden and simplifying control *** control performance of the strategy is verified by employing steady-state *** impact of controller parameters is studied by establishing a small signal ***,both simulation cases and experimental tests prove the feasibility of this scheme.
Radiant syngas cooler(RSC)is widely used as a waste heat recovery equipment in industrial *** this work,an RSC with radiation screens is established and the impact of gaseous radiative property models,gas components,a...
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Radiant syngas cooler(RSC)is widely used as a waste heat recovery equipment in industrial *** this work,an RSC with radiation screens is established and the impact of gaseous radiative property models,gas components,and ash particles on heat transfer is investigated by the numerical simulation *** the syngas components and the pressure environment of the RSC,a modified weighted-sum-of-gray-gases model was *** modified model shows high accuracy in *** computational fluid dynamics simulation,the calculated steam production is only 0.63%in error with the industrial *** with Smith's model,the temperature decay along the axial direction calculated by the modified model is *** components are of great significance to heat recovery capacity,especially when the absorbing gas fraction is less than 10%.After considering the influence of particles,the outlet temperature and the proportion of radiative heat transfer are less affected,but the difference in steam output reaches 2.7 t·h^(-1).The particle deposition on the wall greatly reduces the heat recovery performance of an RSC.
Bending test of reinforced concrete beams using materials imported from Southeast Asia were tested to evaluate the non-contact lap splice length of longitudinal bars encased in grouted corrugated ducts. The test resul...
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Radar provides information on target distance, direction, and velocity, but not directly on angular velocity. We study signal processing for estimating angular velocity directly by radar. First, we describe the signal...
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The authors propose a new defined tensile stress distribution for steel fiber reinforced concrete (SFRC) to evaluate the flexural strength of SFRC beams. It is a simplified formula based on the SFRC tensile stress – ...
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Whether the oil and gas fields in the Carbon Capture,Utilization,and Storage(CCUS)project use underground storage or energy supplementation to enhance oil recovery,they must be injected or monitored through the ***,th...
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Whether the oil and gas fields in the Carbon Capture,Utilization,and Storage(CCUS)project use underground storage or energy supplementation to enhance oil recovery,they must be injected or monitored through the ***,the foundation and requirement for the safety of carbon dioxide(CO_(2))storage is the wellbore's *** CO_(2) is dissolved in water,carbonic acid is created,and this acid strongly corrodes underground ***,the integrity issue with CO_(2) injection wells is more noticeable than with other *** annular pressure during gas injection is the primary symptom of gas injection string leakage in CO_(2) injection *** study aims to provide real-time pipe string monitoring using a distributed optical fiber temperature sensing system(DTS)and a distributed optical fiber acoustic sensing system(DAS).Variations in temperature and vibration are caused by annulus pressure relief or gas *** fiber logging,in contrast to traditional logging,has better performance indicators for optical fiber sensing *** adapt to complex wellbore conditions,it is necessary to enhance the temperature accuracy of DTS and the sensitivity and signal-to-noise ratio of DAS in CO_(2) drive injection wells based on the features of the gas injection *** differentiate the leakage signal from the regular fluid flow signal,the energy calculation in the frequency band is done for DAS based on noise reduction,and the signal processing in the frequency band is done by the spectrum characteristics of the CO_(2) wellbore *** translation invariant wavelet algorithm is the primary denoising method for DTS,overcoming the shortcomings of traditional wavelet threshold algorithms such as excessive smoothing and the pseudo-Gibbs ***,the depth correction during the optical cable lowering process is also examined in this paper.A CO_(2) gas injection well field experiment was conducted using this technology.A 1671m well w
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