Yang J.,University of Toronto |
He Y.,UTM |
Caspersen J.,University of Toronto
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2014
A comprehensive forest resource inventory needs more detailed species information at individual tree level. Although conventional ground-based measurement fails to achieve this target in an efficient way, the emergence of high resolution remote sensing images has made it possible in the past decade. Individual tree crown delineation is one of the most critical steps for tree species classification from remote sensing images. However, it is still challenging to delineate individual tree crowns in deciduous forests because of the continuous canopy. In this study, a multi-band watershed segmentation method is proposed to delineate deciduous tree crowns by constructing a spectral angle space. The proposed algorithm is further examined by a high resolution multispectral aerial image of a deciduous forested area in Haliburton Forest, Ontario, Canada. Results demonstrate that, the proposed multi-band watershed segmentation method outperforms the existing valley-following based ITC map, in terms of visual interpretation and quantitative evaluation. © 2014 IEEE.
Tong A.,UTM |
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2014
The retrieval of chlorophyll content at a range of spatial-temporal scales is central for monitoring vegetation physiology, productivity and health. However, estimating chlorophyll measurements from the leaf to canopy level still remains a challenge over years, especially for heterogeneous landscapes. This study focuses on the estimation of chlorophyll content between years based on the combination of lab-based leaf hyperspectral data, field-based canopy hyperspectral data, and SPOT-5 multispectral imagery. A comprehensive list of 144 published spectral indices including broad- and narrow-band were calculated and their performances are evaluated in order to determine a general spectral index that could be used to estimate vegetation chlorophyll contents between two consecutive years at leaf and canopy levels. At the leaf and field-based scales, narrowband indices utilizing wavelengths from the red to red edge region had the strongest relationships with chlorophyll content for both field seasons. At the space-based multispectral level, the Simple Ratio (SR) index had the best predictive performance for canopy level chlorophyll content. A chlorophyll map was generated from SPOT-5 derived SR values with a map accuracy of 63.6%. © 2014 IEEE.
Babar M.I.,UTM |
Ghazali M.,UTM |
Jawawi D.N.A.,UTM |
IET Software | Year: 2014
In the value-based software (VBS) development, an innovative idea is realised in order to gain an economic leverage. The VBS systems deal with financial streams and this thing make them different from the conventional systems. The success of a VBS system is associated with a valuable set of requirements. The valuable requirements can only be gathered from success critical stakeholders. To select a set of success critical stakeholders, different stakeholders identification and quantification (SIQ) approaches are presented by the researchers. The current approaches cannot be adopted as a standard as different methods and processes are adopted in different approaches. In this study, the aim is to find out the reported evidence based attributes or characteristics of the stakeholders and their usage context in terms of their application in different domains, stakeholders' quantification metrics, the reported stakeholder types and the reported issues of VBS development. The standard systematic literature review guidelines are used as given by Barbara Kitchenham. The literature evidence shows that there is a need to explore all the possible stakeholders' attributes. The stakeholders' metrics can be derived by using the stakeholders' attributes and a new SIQ framework can be proposed for the VBS systems. © 2014 The Institution of Engineering and Technology.
BEIAC 2012 - 2012 IEEE Business, Engineering and Industrial Applications Colloquium | Year: 2012
During the past three decades, the rapid pace of globalisation and economic restructuring has resulted in South-East Asian city-regions receiving the unanticipated urbanisation pressures. In order to control and decrease the impact of urbanisation pressures on city living, the government in Singapore has advocated growth management approaches giving particular interest to urban sustainability. Since, many researchers claimed of the social and environmental beneficial effects of high density compact city living, such as social equity. This paper aims to obtain the dwellers' perception desirability of the Singapore Compact City residing and probe the potential cost and benefits of compact development, which may be delivered by social and spatial aspects of the compactness to inspect the validity of assertions that the compact city promotes social equity. Research outcomes indicated that although compactness concept is associated with some negative impacts, it seems to be positive for some aspects of social fairness and this model was desirable, and accepted by the majority of dwellers who reside in the city centre. © 2012 IEEE.
Syed Yusof S.K.,TRG laboratory |
Shu'aibu D.S.,Bayero University |
International Review on Computers and Software | Year: 2013
Cognitive features enable wireless communications to utilize unoccupied spectrum with the least interference to the existing users and solve the scarcity of spectrum. Scheduling policy design plays a crucial role to efficiently and fairly allocate the available spectrum in cognitive radio network. Fair scheduling can provide better opportunity to the users with lower priority, but will reduce the maximum achievable throughput. Therefore, enhancing the resource utilization for high throughput and make a compromising between the system throughput and fairness is a challenging issue. Moreover, accurate designing of medium access control frame structure is necessary with scheduling scheme in cognitive radio network. In this paper, a scheduling algorithm is developed for cognitive radio network to improve the secondary user traffic QoS in terms of throughput, delay and fairness. This method is based on Earliest Deadline First scheduling to preserve the QoS of all types of Secondary User traffics. The research focuses on downlink scheduling, and the basic allocated resource unit is time-frequency block. Simulation results, in different performance metrics, verify the proposed scheduler can guarantee fair resource allocation with no starvation occurred for non-delay sensitive applications. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.
Mazalan N.A.,UTM |
Malek A.A.,Malakoff Corporation Berhad |
Wahid M.A.,University of Technology Malaysia |
Mailah M.,University of Technology Malaysia |
And 2 more authors.
Applied Mechanics and Materials | Year: 2013
Main steam temperature is one of the most important parameters in coal fired power plant. Main steam temperature is often described as non-linear and large inertia with long dead time parameters. This paper present main steam temperature modeling method using neural network with Levenberg-Marquardt learning algorithm. The result of the simulation showed that the main steam temperature modeling based on neural network with Levenberg-Marqurdt learning algorithm is able to replicate closely the actual plant behavior. Generator output, main steam flow, main steam pressure and total spray water flow are proven to be the main parameters affected the behavior of main steam temperature in coal fired power plant. © (2013) Trans Tech Publications, Switzerland.
Othman Hamadameen A.,UTM |
Marlizawati Zainuddin Z.,UTM
Life Science Journal | Year: 2013
The focus of this paper is a survey of various kinds of multiobjective linear programming problems, where fuzziness and/or randomness in objective and/or in constraints are discussed comprehensively including full fuzzy stochastic in both the objective functions and constraints. This paper also studied the multiobjective fuzzy stochastic linear programming problems, and what relatives to them chronologically in this century, such formulation, and the various research methodology that has been used in transforming them to their corresponding equivalent deterministic linear programming problems. Optimal solution for the original problem has been discussed too.
Al Gizi A.J.H.,UTM |
International Review of Automatic Control | Year: 2013
Overall intelligent control system which runs on fuzzy, genetic and neural algorithm is a promising engine for large scale development of control systems. It's development relies on creating environments where anthropomorphic tasks can be performed autonomously or proactively with a human operator. The ability to control processes, with a degree of autonomy definitely depends on the quality of an intelligent control system envisioned. In this paper, a summary of published techniques for intelligent control system is presented to enable a design engineer to choose architecture for his particular purpose. The focus is on intelligent fuzzy, genetic and neural systems and how they can be used in a controlled structure. Published concepts are grouped according to their functionality. Their respective performances are compared. The various fuzzy, genetic and neural techniques are analyzed in terms of their complexity, efficiency, flexibility, start-up behavior and utilization of the controller with reference to an optimum control system condition. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.
Ayub Q.,UTM |
Zahid M.s.M.,UTM |
Abdullah A.H.,UTM |
Journal of Electrical Engineering and Technology | Year: 2013
DTN flooding based routing protocol replicate the message copy to increase the delivery like hood that overloads the network resources. The probabilistic routing protocols reduce replication cost by forwarding the message to a node that holds high predictability value to meet its destination. However, the network traffic converges to high probable nodes and produce congestion that triggers the drop of previously stored messages. In this paper, we have proposed a routing protocol called as Connection frequency Buffer Aware Routing Protocol (CFBARP) that uses an adaptive method to maintain the information about the available buffer space at the receiver before message transmission. Furthermore, a frequency based method has been employed to determine the connection recurrence among nodes. The proposed strategy has performed well in terms of reducing message drop, message relay while increases the delivery probability.
Yahya N.,UTM |
Journal of Theoretical and Applied Information Technology | Year: 2015
System integration of an operation center has become more complex and heterogeneous due to rapid innovations in the IT industry. Problems arise when a new integration requirement emerges due to complexity of the system integration architecture. To simplify the system integration, interoperability has to be emphasized at the design stage. Architectural design is the stage wherein the process to identify the interfaces involved in the system integration needs to be considered. Approaches to simplifying system integration via service interface design have been the subject of many research studies. In this paper, case study on two (2) traffic operation centers in Malaysia i.e. Transport Management Centre of Kuala Lumpur City Hall and Traffic Monitoring Centre of Malaysian Highway Authority were conducted to identify gaps amongst the system integration approaches used in both operation centers. Three (3) prominent approaches of system integration used by both operation centers were chosen, explored and discussed, namely, methodoriented interface, message-oriented interface and resource-oriented interface. The result of a systematic comparison of the approaches mentioned is also presented. Six (6) criteria were established to make comparison on the approaches: interoperability, uniformity, scalability, reusability, heterogeneity, and compatibility. The objective was to determine the best contemporary approach to service interface design in centralized system integration. The outcome of the evaluation was examined and improvement to the service interface design is proposed. The study is very significant as an attempt to establish a practice reference for enhancement of the current system integration as well as serve as a guide for future deployment of operation centers. © 2005 - 2015 JATIT & LLS. All rights reserved.