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Recognition of human actions by using wearable sensors has become an important research field. Segmentation to sensor data is a vital issue in reconstructing and understanding human daily actions, and strongly affects the accuracy of human actions recognition. Traditional online segmentation approaches are mostly designed for one-dimensional sensor data, which greatly limits these approaches to multi-dimensional...
Urban Last Mile Logistics (ULML) has been taking an increasingly important role alongside the development of e-commerce. The common delivery mode in the ULML is the Attended Home Delivery (AHD). However, such a delivery mode lacks flexibility, which means customers have to be waiting at home during certain time periods. Apart from AHD, another promising delivery mode is becoming available, which is...
A slider-crank wave energy converter (WEC) is a novel energy conversion device. It converts wave energy into electricity at a relatively high efficiency, and it features a simple structure. Past analysis on this particular WEC has been done under regular sinusoidal wave conditions, and suboptimal energy could be achieved. This paper presents the analysis of the system under irregular wave conditions;...
Slider crank Wave Energy Converter (WEC) is a novel energy conversion device. It converts wave energy into electricity at a relatively high efficiency, and it features a simple structure. Past analysis on this WEC has been done under regular sinusoidal wave conditions, and a suboptimal energy could be achieved. This paper presents the analysis of the system under irregular wave conditions; a time-domain...
This paper presents a novel slider crank power take-off system and wave tracking control methodology for efficiently converting the energy of open ocean waves into electrical energy. The Wave Energy Converter (WEC) and Power Take-off System (PTOS) are modeled and a non-parametric control strategy to maximize energy extraction under regular sinusoidal wave condition is introduced. Energy extraction...
The aim of this paper is to present a bi-level model for the resource-constrained multiple project scheduling problems (RCMPSP). For the practical situation, the complex hierarchical organization structure and bi-random environment are considered in the decision making process. For solving the bi-level model, improved particle swarm optimization algorithm is designed to obtain the optimal solutions...
Mass customization plays a significant role for customer satisfaction and for reaching global markets in today's highly competitive changing world. However, customization brings companies extra costs because of the different tasks and scheduling and/or manufacturing issues of model variations. Companies in the manufacturing industry are in a pursuit of reducing their costs whilst increasing their...
Transport capacity was originally introduced in the study of wireless ad hoc networks as a measure of the distance hauling capacity of a wireless network. In this paper, we develop a general network model to extend the concept of transport capacity to cellular wireless networks. We show that in the case of a p-dimensional regular cellular network, the transport capacity of the network follows the...
Dexterous robotic arms have gained increasing attention in the robotics community in recent years, especially snake-like robots. A cable-driven snake-like robot arm (CDSLRA) owns a number of promising advantages such as: light-weight structure, low energy consumption, high speed motion due to low moment inertia and it is suitable to work in constrained work-conditions. A prototype consisting a series...
Multi-threshold CMOS is a very effective technique for reducing standby leakage power during long periods of inactivity. Recently, a power-gating scheme was presented to support multiple power-off modes and reduce the leakage power during short periods of inactivity. However, this scheme suffers from high sensitivity to process variations, which impedes manufacturability and also limits its applicability...
Evaluating association rules is an integral post process in association rule mining. Association rules are examined by measures for their interestingness. Different interestingness measures have been proposed. Given an association rule mining task, measures are assessed and selected against a set of user-specified properties. However, in practice, due to the subjectivity and imperfection in property...
To accurately measure the magnetic energy difference at different positions, the Joule balance is designed to work under a high stability and sensitivity environment. This paper presents the detailed design of balance system, the vibration characteristics of the balance foundation and the deformation of balance beam. The experimental results show that the maximum displacement of foundation is detected...
In semiconductor manufacturing processes, mixed-products are usually fabricated on the same set of process tool with different recipes. Run-to-run controllers which based on the exponential weighted moving average (EWMA) statistic are probably the most frequently used in industry for the quality control of certain semiconductor manufacturing process steps. However, for mixed-product drifting process,...
A one dimensional spectral model of a self-organizing external cavity laser diode with a PR crystal in the external cavity was developed. The model combines the photon-carrier density coupled rate equations model and a plane wave PR crystal model. The model confirms that the self-organizing external cavity laser diode operates in a single longitudinal mode with an output power up to 0.55 W.
Schrodinger equation and Poisson equation are solved self-consistently for Al0.5Ga0.5N/GaN heterojunctions grown along the c axis, then the distribution of electrons and the exact energy of all the bounded states confined in heterojunctions are gotten, and the electrons are found to take up the first two subbands. Considerable magnitude of Rashba spin splitting for the first subband at the Fermi level...
This paper presents the results from preliminary models comparing the mechanical performance of polymer cored BGA type interconnects with conventional solid solder BGA balls. The surface evolver was first used to predict the solder fillet shapes for use in the models. The mechanical behaviour of some candidate polymer spheres were also measured and the results of these measurements used to estimate...
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