The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Rebecca Y. M. Wong - One of the best experts on this subject based on the ideXlab platform.
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Improving Quality of Crane-Lorry Assignments With Constraint Programming
IEEE Transactions on Systems Man and Cybernetics Part C (Applications and Reviews), 2007Co-Authors: Andy Hon Wai Chun, Rebecca Y. M. WongAbstract:The ability to maximize service quality while minimizing cost is very important to service-oriented businesses, such as Lorry leasing. Very often, the ability to consistently offer higher quality service is the main differentiating factor between a business and its competitors. For Lorry leasing businesses, service quality and cost are directly related to how resources-vehicles, cranes, and drivers-are allocated to jobs. The ability to assign the right combination of resources is crucial to daily operations. This paper presents how we modeled this assignment problem as a constraint-satisfaction problem (CSP) and implemented using constraint programming (CP) with an algorithm that we call the crane-Lorry optimizing engine (CLOE). CLOE was implemented for the largest crane-Lorry company in Hong Kong. Furthermore, plans are generated within seconds compared to close to an hour if done manually. All necessary constraints and criteria are considered systematically. We have experimented with many different types of search heuristics and have analyzed their effects on plan quality. We have found that by considering both the experience of the crane-Lorry-driver combination and maximizing on the order assignment, we were able to generate plans that were significantly better than those produced by human planners, and within a substantially shorter time. Although the use of constraint-based assignment techniques is still limited in the vehicle leasing industry, we hope our combination of automated assignment with Internet portal technology that streamlines business-to-business, business-to-consumer, and business-to-employee communications can excite interest in this area
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CLSS: An Intelligent Crane Lorry Scheduling System
Applied Intelligence, 2004Co-Authors: Wai Chun, Rebecca Y. M. WongAbstract:Companies that provide crane-Lorry services are faced with the daily need to perform vehicle and driver allocation and scheduling. Many companies still do this manually due to the lack of suitable technologies. This manual approach is both time consuming and inaccurate and most probably will not lead to an optimized plan that can reduce operational costs. In this paper, we describe the design of a system called “Crane Lorry Scheduling System” (CLSS) that we have developed for the largest crane Lorry company in Hong Kong. A crane Lorry company is a company that provides lorries with different types of mounted crane equipment and drivers to service different types of moving and lifting jobs. CLSS is a Web-based application that streamlines communication with customers, subcontractors and employees/Lorry drivers. We modeled the Lorry-assignment problem as a constraint-satisfaction problem (CSP) algorithm, which we call the “Crane Lorry Optimizing Engine” (CLOE). CLOE was designed to be easily customizable to match the needs and requirements of different crane Lorry companies. We experimented with two versions of CLOE, regular CLOE that finds “best” solutions and X-CLOE that finds “optimal” solutions. Results from our tests show that CLOE is faster and generates better quality plans than the manual approach.
Hsi-jen Chen - One of the best experts on this subject based on the ideXlab platform.
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Fire Dynamics and Solar Heating Influence on an Oval-Shaped Chemical Tank Lorry
Industrial & Engineering Chemistry Research, 2001Co-Authors: Hsi-jen ChenAbstract:This paper presents a thermal response analysis of an oval-shaped, horizontal tank Lorry due to fire exposure. In the accident scenario, a chemical tank Lorry containing methanol, in a loading/unloading station, caught on fire as a consequence of a loss of containment of this flammable material. To analyze the fire dynamics on the tank Lorry, a mathematical model is developed for the simultaneous fluid-flow and heat-transfer problem. An application is also made to predict the thermal effect on the tank Lorry exposed to solar heating for extended periods of time.
M.e. Lovell - One of the best experts on this subject based on the ideXlab platform.
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UNDER-REPORTING OF TRAUMA FROM Lorry MIRRORS?
Injury, 1992Co-Authors: M.e. LovellAbstract:This note describes two recent cases of trauma from Lorry mirrors protuding from the vehicles; its author considers it very likely that this is not an uncommon event. Details of the two cases are presented briefly, and the author knows of two other cases. Specifications of Lorry mirrors in the UK are currently regulated within a European Economic Community Commission (EEC) Directive, dated 18 February 1985. The author considers that trauma from Lorry mirrors, though perhaps unusual, could be under-reported. He suggests that: (1) the backs of mirrors should be of lighter colour, to become more visible; (2) the mirror should be made of a material less likely to cause injury on impact; (3) the mirror pivoting device should be checked at the MOT test; (4) the Department of Transport should be considering a review of its regulations to improve pedestrian safety.
Wai Chun - One of the best experts on this subject based on the ideXlab platform.
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CLSS: An Intelligent Crane Lorry Scheduling System
Applied Intelligence, 2004Co-Authors: Wai Chun, Rebecca Y. M. WongAbstract:Companies that provide crane-Lorry services are faced with the daily need to perform vehicle and driver allocation and scheduling. Many companies still do this manually due to the lack of suitable technologies. This manual approach is both time consuming and inaccurate and most probably will not lead to an optimized plan that can reduce operational costs. In this paper, we describe the design of a system called “Crane Lorry Scheduling System” (CLSS) that we have developed for the largest crane Lorry company in Hong Kong. A crane Lorry company is a company that provides lorries with different types of mounted crane equipment and drivers to service different types of moving and lifting jobs. CLSS is a Web-based application that streamlines communication with customers, subcontractors and employees/Lorry drivers. We modeled the Lorry-assignment problem as a constraint-satisfaction problem (CSP) algorithm, which we call the “Crane Lorry Optimizing Engine” (CLOE). CLOE was designed to be easily customizable to match the needs and requirements of different crane Lorry companies. We experimented with two versions of CLOE, regular CLOE that finds “best” solutions and X-CLOE that finds “optimal” solutions. Results from our tests show that CLOE is faster and generates better quality plans than the manual approach.
Jennifer L. Hudson - One of the best experts on this subject based on the ideXlab platform.
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A Cognitive Model of Pathological Worry in Children and Adolescents: A Systematic Review
Clinical Child and Family Psychology Review, 2020Co-Authors: Annabel Songco, Jennifer L. Hudson, Elaine FoxAbstract:Worry is common in children and adolescents, yet some youth experience excessive worries that persist over time and cause significant distress. Whilst the literature on worry and generalised anxiety disorder (GAD) in adults is well established, relatively less is known about the cognitive mechanisms underlying child and adolescent worry. An influential cognitive model of adult pathological worry (Hirsch and Matthews in Behav Res Therapy 50:636–646, https://doi.org/10.1016/j.brat.2012.06.007 , 2012) proposes that negative information-processing biases, reduced executive functions, and verbal worry are critical in the aetiology of GAD in adults. The current systematic review investigated whether this cognitive model of worry could be extended to understand child and adolescent worry. Following a systematic search of the literature and screening for eligibility, 30 studies were identified. Evidence indicates that negative information-processing biases and reduced executive functions play an important role in worry and GAD in children and adolescents. However, evidence that children and adolescents experience verbal worry is inconclusive. Building upon Hirsch and Matthews' cognitive model (Behav Res Therapy 50:636–646, https://doi.org/10.1016/j.brat.2012.06.007 , 2012), we propose a model of child and adolescent worry to provide a guiding framework for future research. We conclude that cognitive models of worry should incorporate a developmental framework in order to provide greater insight into the mechanisms uniquely associated with worry in children and adolescents and help to identify the cognitive processes to target for early interventions and treatments.
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The Metacognitive Model of Generalized Anxiety Disorder in Children and Adolescents
Clinical Child and Family Psychology Review, 2010Co-Authors: Danielle M. Ellis, Jennifer L. HudsonAbstract:Worry is a common phenomenon in children and adolescents, with some experiencing excessive worries that cause significant distress and interference. The metacognitive model of generalized anxiety disorder (Wells 1995 , 2009 ) was developed to explain cognitive processes associated with pathological worry in adults, particularly the role of positive and negative beliefs about worry. This review evaluates the application of the model in understanding child and adolescent worry. Other key issues reviewed include the link between cognitive and metacognitive development and worry, and the measurement of worry and metacognitive worry in young people. Implications of these findings and directions for future research are discussed.
