• The significance of stock management to jet fuel supply using partial least squares

    The significance of stock management to jet fuel supply using partial least squares

    Operational and commercial efficiency at a jet fuel depot are vital indices for a jet fuel marketer toward ensuring maximum business productivity. In Nigeria, jet A-1 aviation fuel scarcity is a yearly challenge that periodically triggers jet fuel price increase, air fare price hike and flight cancellation. The causes of the scarcity have been ascribed to the challenges facing jet fuel supply process. In this study, the significance of each of...

     7 p vaa 26/05/2020 67 1

  • Hybrid beamforming for millimeter wave systems using the MMSE criterion

    Hybrid beamforming for millimeter wave systems using the MMSE criterion

    Hybrid analog and digital beamforming (HBF) has recently emerged as an attractive technique for millimeter-wave (mmWave) communication systems. It well balances the deman d for sufficient beamforming gains to overcome the propagatio n loss and the desire to reduce the hardware cost and power consumption. In this paper, the mean square error (MSE) is chosen as the performance metric to characterize the transmission reliability. Using the...

     15 p vaa 30/03/2020 12 1

  • Hybrid beamforming for 5G millimeter-wave multi-cell networks

    Hybrid beamforming for 5G millimeter-wave multi-cell networks

    Multi-cell wireless systems usually suffer both intracell and inter-cell interference, which can be mitigated via coordinated multipoint (CoMP) techniques. Previous works on multi-cell analysis for the microwave band generally consider fully digital beamforming that requires a complete radio-frequency chain behind each antenna, which is less practical for millimeterwave (mmWave) systems where large amounts of antennas are necessary to provide...

     8 p vaa 30/03/2020 21 1

  • Chất lượng dịch vụ, hình ảnh doanh nghiệp và truyền miệng trong ngành hàng không nội địa Việt Nam

    Chất lượng dịch vụ, hình ảnh doanh nghiệp và truyền miệng trong ngành hàng không nội địa Việt Nam

    Mục đích của nghiên cứu này xem xét ảnh hưởng của chất lượng dịch vụ hàng không, đến thông tin truyền miệng thông qua hình ảnh doanh nghiệp trong ngành hàng không nội địa Việt Nam. Dữ liệu khảo sát được thu thập từ 298 hành khách sử dụng dịch vụ hàng không nội địa tại sân bay Tân Sơn Nhất.

     10 p vaa 21/09/2019 133 2

  • Customer satisfaction and quality of Vietnam Airlines domestic services

    Customer satisfaction and quality of Vietnam Airlines domestic services

    The paper examines relation between quality of Vietnam Airlines domestic services and customer satisfaction by gathering opinions from 402 passengers employing Skytrax scale with some modification along with Cronbach’s alpha, EFA and multiple regression analysis.

     12 p vaa 28/06/2019 168 1

  • An LP based approximate dynamic programming model to address airline overbooking under cancellation, refund and no show

    An LP based approximate dynamic programming model to address airline overbooking under cancellation, refund and no show

    In this paper we simultaneously address four constraints relevant to airline revenue management problem: Flight cancellation, customer no-shows, overbooking and refunding. We develop a linear program closely related to the dynamic program formulation of the problem which we later use to approximate the optimal decision rule for rejecting or accepting customers. We give a novel proof that the optimal objective function of this linear program is...

     20 p vaa 28/06/2019 133 1

  • Airline seat management with round trip requests

    Airline seat management with round trip requests

    Consider a multi-period multi-fare class airline booking problem related to a two-leg airline network. Travel requests include outbound, inbound trip, and round trips. The round-trip refers to a journey comprising both outbound and inbound trips. To develop a dynamic-nested booking decision-making system for the airline network, this study designs a dynamic model that enables the airline reservations system to devise a set of dynamic decision...

     16 p vaa 28/06/2019 142 1

  • Design and installation of vibration testing system for spring mounted model of wing

    Design and installation of vibration testing system for spring mounted model of wing

    This paper presents the design and installation of measuring vibration system in wind tunnel area 1m x 1m. The theoretical analysis of the spring structure in this model help we possible to design a system for wind tunnel by yourself with suitable area, wind speed as well as survey wing model to obtain results desire.

     9 p vaa 22/11/2018 133 1

  • On the performance of cooperative cognitive networks with selection combining and proactive relay selection

    On the performance of cooperative cognitive networks with selection combining and proactive relay selection

    This paper proposes an outage analysis framework for cooperative cognitive networks with proactive relay selection and selection combining (SC) under licensed outage constraint, maximum transmit power constraint, independent non-identical (i.n.i) fading distributions, erroneous channel information, and licensed users’ interference.

     10 p vaa 30/04/2018 134 1

  • Results and comparision between different control algorithms for a quadrotor using ArduPilot framework

    Results and comparision between different control algorithms for a quadrotor using ArduPilot framework

    This article presents a simple way to test the behavior of various control algorithms, with the quadrotor as the control target and ArduPilot is the framework to create the firmware carrying multi controllers.

     9 p vaa 30/04/2018 139 1

  • Optimal precoder designs for sum rate maximization in MIMO multiuser multicells

    Optimal precoder designs for sum rate maximization in MIMO multiuser multicells

    This paper is concerned with the joint linear precoder design problem for the multiuser multiple-input multiple-output (MIMO) heterogeneous networks (HetNets) in which multiple femto base stations (FBSs) coexist with a macro base station (MBS).

     10 p vaa 30/04/2018 147 1

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