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J. A. Morabito - One of the best experts on this subject based on the ideXlab platform.

  • The Viejo Retamo secondary canal
    Irrigation and Drainage Systems, 1991
    Co-Authors: Marinus G. Bos, W. Wolters, A. Drovandi, J. A. Morabito
    Abstract:

    The Intended Operation of the Rio Tunuyan irrigation scheme in the province of Mendoza, Argentina, is to divide flow proportionately over the entire area in accordance with registered water-rights. The main division of flow is by regulators at the heads of the lateral canals, which serve areas of appr. 15,000 ha. Taking the sub-lateral or secondary canal Viejo Retamo as an example, this paper discusses the flow division downstream of these regulators. The Operation of the canal is evaluated with two performance indicators: -the ratio of volume of water Intended to be supplied to the tertiary units over the volume of water actually supplied, and -the misallocation of water in volume. In the Rio Tunuyan scheme, there is also a relation between the evapotranspiration of crops and the groundwater level: if less than 60% of the supplied canal water evapotranspires, the groundwater level rises.

  • The Viejo Retamo secondary canal. Performance evaluation case study: Mendoza, Argentina
    Irrigation and Drainage Systems, 1991
    Co-Authors: Marinus G. Bos, W. Wolters, A. Drovandi, J. A. Morabito
    Abstract:

    The Intended Operation of the Rio Tunuyan irrigation scheme in the province of Mendoza, Argentina, is to divide flow proportionately over the entire area in accordance with registered water-rights. The main division of flow is by regulators at the heads of the lateral canals, which serve areas of appr. 15,000 ha. Taking the sub-lateral or secondary canal Viejo Retamo as an example, this paper discusses the flow division downstream of these regulators. The Operation of the canal is evaluated with two performance indicators: -the ratio of volume of water Intended to be supplied to the tertiary units over the volume of water actually supplied, and -the misallocation of water in volume.

Helge Lang Pedersen - One of the best experts on this subject based on the ideXlab platform.

  • Models for use in power plant Operation
    International Journal of Electrical Power & Energy Systems, 1992
    Co-Authors: Helge Lang Pedersen
    Abstract:

    Abstract The paper describes a modelling framework aimed at modelling power plant Operation. The objective is to provide the means for building a reliable model of the Intended Operation of the plant. The model is to be implemented using a knowledge based system. The knowledge based system will point out discrepancies between the Intended Operation as described by the model and the actual Operation described by the parameter values measured in the plant. The framework allows the description of power plants at different levels of detail dependent on the purpose the model should help to serve. Furthermore, the modelling framework is based on object-oriented development techniques permitting the description of knowledge elements (rules, objects, etc.) at different levels in a functional classification structure. The reasoning using the model is performed using a very flexible reasoning system, ABSTRACTIONS, developed at the Institute of Automatic Control Systems at the Technical University of Denmark. A prototype using this system and a SMALLTALK/V programming environment has been provided.

Meera Hameed - One of the best experts on this subject based on the ideXlab platform.

Jinchen Wang - One of the best experts on this subject based on the ideXlab platform.

  • Adaptive Signal Separation for Dual-Input Doherty Power Amplifier
    IEEE Transactions on Microwave Theory and Techniques, 2020
    Co-Authors: Jun Peng, Weimin Shi, Tingting Yao, Jinchen Wang
    Abstract:

    In this article, the generating mechanisms of nonlinear distortion of the dual-input Doherty power amplifier (DIDPA) are discussed, and based on this, an adaptive signal separation algorithm (ASSA) is proposed to improve the nonlinearity of DIDPA. The main idea of the ASSA is to minimize the mismatch between the signal separation functions and the Intended Operation, which is considered to be the leading cause of nonlinearity in DIDPA. The signal separation functions are used to determine the power ratio and phase difference between the main and the auxiliary amplifier. Moreover, in order to maximize the drain efficiency, an efficiency dictionary which is derived from the static measured results is employed during the ASSA. The performance of the ASSA is validated experimentally on a gallium nitride (GaN)-based DIDPA. The measured results show that with the help of the ASSA, the adjacent channel power ratio and normalized mean square error of output signal can be improved significantly without sacrificing efficiency. In order to further demonstrate the validity of the ASSA, the digital predistortion results of the DIDPAs with and without ASSA are compared with two kinds of behavioral models and two kinds of modulation signals.

W Ding - One of the best experts on this subject based on the ideXlab platform.

  • application of ultrasonic vibrations in welding and metal processing a status review
    Journal of Manufacturing Processes, 2017
    Co-Authors: S. Kumar, C S Wu, G K Padhy, W Ding
    Abstract:

    Abstract This review paper aims to introduce systematic in-depth analysis of diversified aspects of ultrasonic application in metal joining and processing including its limitations, future prospects and assessments. Allied welding and metal processing technologies employing ultrasonic vibrations either as the primary source to accomplish the Intended Operation or as an assistant source to improve the Operation efficiency and product quality are classified and discussed. The detailed state-of the art, experimentation and progresses of the ultrasonic vibrations and its applications in the above areas are comprehensively examined, evaluated and presented for exhaustive understandings of its physical mechanism. The ultrasonic vibrations assisted processes claim several advantages such as improved mechanical properties, enlarged process window, higher heat generation, better material mixing and enhanced turbulence etc. over the conventional processes which lead to the remarkable and globalized applications of ultrasonic vibrations in the welding and its allied areas in the present century.