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The Quay Crane Scheduling Problem (QCSP) is a major concern in ports and container terminals. It aims to minimize vessels and quay completion time by organizing the sequence of loading and unloading processes. The formulation is developed for the QCSP by taking into consideration a berth with multiple vessels and the solution methodology is presented for a numerical example using the General Algebraic...
This paper proposes an optimal scheme to balance the trade-off between signaling load and radio resource utilization in UMTS networks. To efficiently use limited radio resource, 3GPP introduces RRC state transition mechanism in UMTS. This mechanism uses a timer called TDCH to determine when mobile phone should release its connection to network. To examine the impact of such a timer on radio resource...
Standard high performance clusters (HPC) are being extensively used for solving computationally intensive problems in various scientific fields, one of which is the field of reservoir simulation. In our work, we expand the conventional HPC systems to run larger reservoir simulations on a heterogeneous grid of HPCs. This expansion is accomplished by developing a unique domain decomposition technique...
The effect of load models on capacitor allocation in distribution network is investigated in this paper It is shown that load models can significantly affect the capacitor allocation. A constant power load model is supposed in most of previous the studies. Such suppositions may lead to incompatible and deceptive results about loss reduction and other subsequent calculations. It has been demonstrated...
Determination of users' contribution to line active power flows on the basis of an accurate way is essential for transmission cost allocation, loss allocation, congestion analysis, and etc. This paper presents a new methodology of active power tracing based on actual operation of the power network for calculating the contributions of individual generators to active flow of lines and loads. In this...
The next generation communications system intend to develop broadband wireless access networks, which support heteronymous uplink and downlink services with different quality of service (QoS) requirement. In this paper, we address when and how to allocate the resource for uplink and downlink in time division duplex (TDD) OFDMA wireless network. For typical cellular network and mesh-like network, due...
Building on the extensive research in Virtual Reality (VR), we are proposing a new dynamic prototype for modelling and simulating carbon emissions in a virtual village called VIRVIL. VIRVIL is a simulated settlement for the assessment of the impact of low and zero carbon technologies and measures in the built environment. The prototype will focus on the impact on the community as a whole, as well...
In this paper we present an algorithm, based on power management of access points (AP), to reduce congestion in wireless local area networks (WLANs). The algorithm finds the most congested access point (MCAP) and adjusts its transmitted power in discrete steps and determines the optimal userspsila assignment such that an optimal load distribution is achieved. Results show that the algorithm is capable...
More and more users subscribing to wireless broadband services are seeking to have access to both WLAN and UMTS networks. We study individually optimal user-network association in an integrated WLAN and UMTS hybrid cell. The association problem is formulated within a non-cooperative game framework. In the formulation, mobile arrivals are assumed to follow the Poisson process and each mobile considers...
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