World Congress on Sustainable Technologies (WCST-2014)最新文献

Comparative analysis of sparse signal recovery algorithms based on minimization norms 基于最小化范数的稀疏信号恢复算法的比较分析

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030100

Hassaan Haider, J. Shah, Usman Ali

{"title":"Comparative analysis of sparse signal recovery algorithms based on minimization norms","authors":"Hassaan Haider, J. Shah, Usman Ali","doi":"10.1109/WCST.2014.7030100","DOIUrl":"https://doi.org/10.1109/WCST.2014.7030100","url":null,"abstract":"In conventional sensing modality, Nyquist sampling theorem is followed as the minimum sampling rate. However, due to constraints e.g. slow sampling process, limited memory, and sensors cost, in some applications Nyquist sampling rate is difficult to achieve. When sampling rate is less than Nyquist sampling rate, aliasing artifacts occur in the recovered signal. Compressed Sensing (CS) is a modern sampling technique, where signal can be recovered faithfully even from fewer samples if signal/image of interest is sparse, which true as most signals/images are sparse in appropriate domain i.e. Wavelet transform, finite difference. Recovering sparse signal efficiently from compressively sampled data can be most challenging part in CS. The recovery problem is highly ill-posed underdetermined system of linear equations, so additional regularization constraints are required. As there can be infinite many solutions, therefore, finding best solution from few measurements becomes an optimization problem, where cost function is minimized. There are several reconstruction methods that exist in literature. These methods can be classified, based on the norms that are used in minimizing the objective function. This paper presents a comparati ve study of modern sparse signal recovery algorithms using different norms. Sparse signal recovery algorithms presented in this paper are Smoothed l0, l1 magic and mixed l1l2 norm based Iterative Shrinkage Algorithms (ISA) e.g. SSF, IRLS and PCD. All algorithms are tested for the recovery of sparse image. The performance measures used for objectively analysing the efficiency of algorithms are mean square error, correlation and computational time.","PeriodicalId":169533,"journal":{"name":"World Congress on Sustainable Technologies (WCST-2014)","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122834929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Rainfall-Runoff relationship for streamflow discharge forecasting by ANN modelling 基于降雨径流关系的人工神经网络流量预测

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030090

S. Areerachakul, P. Junsawang

{"title":"Rainfall-Runoff relationship for streamflow discharge forecasting by ANN modelling","authors":"S. Areerachakul, P. Junsawang","doi":"10.1109/WCST.2014.7030090","DOIUrl":"https://doi.org/10.1109/WCST.2014.7030090","url":null,"abstract":"Rainfall-runoff modeling has been considered as one of the major problems in water resources management, especially in most developing countries such as Thailand. Artificial Neural Network (ANN) models are powerful prediction tools for the relation between rainfall and runoff parameters. Lam Phachi watershed is located in Western Thailand. In each year, people usually undergo drought problem in dry season or flooding problem in wet season due to the influence of the monsoon leading to soil erosion and sediment deposition in the watershed. The goal of this work is to implement ANN for daily streamflow discharge forecasting in Lam Phachi watershed, Suan Phung, Rachaburi, Thailand. For model calibration and validation, two time series of rainfall and discharge are daily recorded from only one hydrologic station (K. 17) in water years 2009-2012. The data from the first three years are used as the training dataset and the last year are used as the test dataset. The results showed that the coefficient of determination (R2) of ANN equal to 0.88. On the other hand, these results could be applied to solve the problems in water resource studies and management.","PeriodicalId":169533,"journal":{"name":"World Congress on Sustainable Technologies (WCST-2014)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121376857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Performance evaluation of cloud e-marketplaces using non preemptive queuing model 基于非抢占排队模型的云电子市场性能评价

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030099

A. Akingbesote, M. Adigun, S. S. Xulu, E. Jembere

{"title":"Performance evaluation of cloud e-marketplaces using non preemptive queuing model","authors":"A. Akingbesote, M. Adigun, S. S. Xulu, E. Jembere","doi":"10.1109/WCST.2014.7030099","DOIUrl":"https://doi.org/10.1109/WCST.2014.7030099","url":null,"abstract":"With the drift of consumers to the Cloud e-marketplaces looking for affordable and cost effective services, waiting time is of interest to every consumer and also a key source of competitive advantage for any cloud e-market provider. Keeping consumers' waiting may incur high costs of consumer's dissatisfaction, such as loss of future business and actual processing costs of complaints. The evaluation of performance impact on consumers' waiting time has not been fully addressed in the context of differentiated service provisioning. In this research, we conducted a modelling and evaluation of a typical cloud e-marketplace using two classes of consumers under non preemptive priority discipline. We studied and compared the performance impact of these two classes in regard to the non-priority discipline. Our approach used the analytical and simulation model. Early results revealed that the average total waiting time is independent of the service discipline. Furthermore, unlike the Non-Priority where the service distribution of the two classes are almost equal when the server utilization increases, the class 1 consumers' waiting time approaches finite limit and that of class 2 consumers deviated slightly from the average total waiting time under the Non preemptive Priority.","PeriodicalId":169533,"journal":{"name":"World Congress on Sustainable Technologies (WCST-2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130676042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Password security enhancement by characteristics of flick input with double stage C.V. filtering 双级C.V.滤波轻弹输入特性增强密码安全性

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030098

Nozomi Takeuchi, R. Uda

引用次数: 1

Performance of granular activatedcarbon comparing with Activated Carbon (bagasse) biofiltration in wastewater treatment 颗粒活性炭与活性炭(甘蔗渣)生物过滤在污水处理中的性能比较

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030091

N. Areerachakul

{"title":"Performance of granular activatedcarbon comparing with Activated Carbon (bagasse) biofiltration in wastewater treatment","authors":"N. Areerachakul","doi":"10.1109/WCST.2014.7030091","DOIUrl":"https://doi.org/10.1109/WCST.2014.7030091","url":null,"abstract":"Organic matters known as major problems in waste water. In this study GAC and Activated Carbon from Bagasse, agriculture waste, were used to treat organic pollutants from waste water. Bagasse waste are prepare activated carbons by zinc chloride activation under three different activation atmosphere, to develop carbons with substantial capability, and to compare efficiency with GAC for long period. The characterizations of activated carbon were studied by iodine number. The performance of activated carbon biofilter is influenced by many operational conditions, such as filter medium type and size, filtration velocity, filter depth and porosity. Even after a long time of operation (42 days), GAC biofilter consistently maintained an organic removal efficiency of 60% even with a shallow filter depth of 300 mm. The change of influent concentration also affected the organics removal in the GAC biofilter. The filters which were fed with wastewater of higher organic concentration had a better TOC removal efficiency because of the increase in organisms' activities as they receive more nutrients. The daily backwash to remove the solids did not affect the biofilm, and thus the organic removal. The GAC medium used in the biofilter led to better organic removal, as compared to activated carbon (from bagasse).","PeriodicalId":169533,"journal":{"name":"World Congress on Sustainable Technologies (WCST-2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129697697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Design implications for a community-based social recipe system 基于社区的社会配方系统的设计含义

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030089

V. Lim, Fulya Yalvaç, M. Funk, Jun Hu, G.W.M. Rauterberg, C. Regazzoni, L. Marcenaro

引用次数: 3

The integrated permitting system and environmental management: a cross analysis of the landfill sector in Mediterranean regions 综合许可制度和环境管理:地中海地区垃圾填埋部门的交叉分析

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030093

Maria Rosa De Giacomo, T. Daddi

引用次数: 0

Studies of isothermal swirling flows with different RANS models in unconfined burner 无约束燃烧器内不同RANS模型的等温旋流研究

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030095

A. R. Norwazan, M. N. Mohd Jaafar

{"title":"Studies of isothermal swirling flows with different RANS models in unconfined burner","authors":"A. R. Norwazan, M. N. Mohd Jaafar","doi":"10.1109/WCST.2014.7030095","DOIUrl":"https://doi.org/10.1109/WCST.2014.7030095","url":null,"abstract":"Numerical analysis of computational fluid dynamics (CFD) is one of technologies that can be minimized the experimental cost. This paper is presents the isothermal swirling turbulent flows analyses in a combustion chamber of an unconfined burner. There are many types CFD models that can be used in order to simulate isothermal flows with the Reynolds-Averaged Navier-Stokes (RANS) models involving the two equations of calculation. The RANS of various models, including standard k-ε, RNG k-ε and realizable k-ε turbulence approach method was applied. These analyses were studied to define the effect of flow axial velocity and tangential velocity that particularly to obtain the center recirculation zone (CRZ). The swirler is used in the burner that significantly influences the flow pattern inside the combustion chamber. The inlet velocity, U0 is 30 m/s entering into the burner through the axial swirler with SN = 0.895 that represented a high Reynolds number, Re. These studies also performed using ANSYS Fluent to evaluate the effect of difference's RANS models. Transverse flow field methods have been used to determine the both velocity's behaviour behind the axial swirler downstream. These results of axial and tangential velocity were normalized with the U0. The velocity profiles' behaviours are obviously changed after entering the swirler and slightly different pattern of each model. However, their flow patterns are similar for all RANS models plane towards the outlet of a burner.","PeriodicalId":169533,"journal":{"name":"World Congress on Sustainable Technologies (WCST-2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128815040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Carbon dioxide mitigation strategies for the Singapore power generation sector 新加坡发电部门的二氧化碳减排战略

World Congress on Sustainable Technologies (WCST-2014) Pub Date : 2014-12-01 DOI: 10.1109/WCST.2014.7030094

H. Ali, S. Weller

引用次数: 2