In order to address the bubble formation and movement in air-water two-phase flow,single bubble rising in stagnant water is experimentally studied by digital image *** are released individually from the submerged orif...
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In order to address the bubble formation and movement in air-water two-phase flow,single bubble rising in stagnant water is experimentally studied by digital image *** are released individually from the submerged orifices with different diameters(1.81 mm,2.07 mm,2.98 mm,3.92 mm)at different detachment *** are recorded by a high-speed video camera and processed by digital image processing technique. The factors impacting the formed volume of bubble are *** experimental results showed that a threshold of gas flow rate(400 mm 3 ·s- 1)divides the bubble formation into two regimes:the constant volume regime and the growing volume *** for the growing volume regime,the surface tension is taken into *** bubble volume is consisted of two parts:the surface tension impacting part and the gas volume flow rate impacting *** improved correlation for bubble volume prediction is developed for the two regimes and better coincidence with the experiment data than the previous models is obtained.
In order to solve the problem that mechanical pointer type flowmeter cannot be calibrated automatically, based on the photoelectric conversion principle, a non-contact meter pointer automatic identification sensor was...
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In this paper, a design of water-flow calibration facilities was proposed which was based on static mass method, static volume method and master meter method. Taking the water-flow calibration facility of Tianjin Univ...
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The flow fields in vortex flow sensors with circular cylinder and trapezoidal cylinder bluff bodies are investigated respectively. Then the characteristics of two flow fields are compared by numerical simulations whil...
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This paper investigates the synchronization problem of a complex dynamical network with non-identical nodes and switching *** an equilibrium for each node nor a synchronization manifold is assumed to *** select averag...
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ISBN:
(纸本)9781467315241
This paper investigates the synchronization problem of a complex dynamical network with non-identical nodes and switching *** an equilibrium for each node nor a synchronization manifold is assumed to *** select average state trajectory as the target of synchronization and establish the error dynamical *** single Lyapunov function method and the bounded synchronization theory, the switching law design method presented which guarantee the bounded synchronization of switched dynamical networks with non-identical *** results verify the validity of the results.
In hot rolling, actual production data were not used to improve the thickness quality of products. For this phenomenon, an online data-driven modeling algorithm was proposed for strip thickness control based on subtra...
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In hot rolling, actual production data were not used to improve the thickness quality of products. For this phenomenon, an online data-driven modeling algorithm was proposed for strip thickness control based on subtractive clustering. Firstly, the input space is divided into several clusters by subtractive clustering, in each cluster a sub-model is built by a least square support vector machine (LS-SVM), and an offline model is obtained by weighting the outputs of these sub-models. Then, when the online data constantly increase, the clustering subsets are adjusted on-line by a subtractive clustering algorithm, and the parameters of the sub-models are determined using the recursive algorithm of the least squares support vector machine. The predictive outputs of the sub-models are the final outputs. Experimental results demonstrate that the method has good prediction accuracy and online learning ability.
Because of high accuracy, excellent repeatability and low pressure drop, turbine flowmeter is widely used in industry to measure gas or liquid flow. However, the disadvantage in linearity restricts its application. A ...
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With the advantage of low initial investment and high running efficiency, experimental facility for flow measurement using master meter method has a broad application. Meanwhile, the sonic nozzle based on the reliable...
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This paper is concerned with Markovian jump systems subject to incomplete knowledge of transition probabilities and actuator saturation. The system under consideration is more general, which covers the systems with co...
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In this paper, a continuous, time varying adaptive controller is developed for an underactuated quadrotor unmanned aerial vehicle (UAV). The vehicle's dynamic model is subject to uncertainties associated with mass...
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