Multi-criteria decision-making analysis in selecting suitable plotting positions for IDF curves of storm events     

Noratiqah Mohd Ariff  Abdul Aziz Jemain  Mohd Aftar Abu Bakar 《Environmental Earth Sciences》2017,76(17):625

Selecting suitable distributions for rainfall data is usually subjective and complex since it requires decision-makers to consider results from various measures of goodness-of-fit indices. In this study, the VIKOR method in multi-criteria decision-making analysis is modified to select the most suitable plotting positions to represent extreme storm intensities in order to build the intensity–duration–frequency (IDF) curves of storm events. This is done by considering the rankings provided by all goodness-of-fit indices used to obtain a compromise solution. Nine plotting positions are considered: Weibull (W), Adamowski (A), Gringorten (G), Hazen (H) and Gumbel (EV I) and two known plotting positions for generalized extreme value (GEV) distribution using Pearson’s skewness and another two using L-skewness. The IDF curves obtained are compared to a reference IDF curves which was found using the GEV distribution. The mean and median for three goodness-of-fit indices, the coefficient of variation of root mean square error, CV_RMSE, the mean percentage of difference, Δ, and the coefficient of determination, R ², are taken as the criteria for selection process. The results show that six plotting positions, A, H, W, G and the two plotting positions with L-skewness, are equally superior compared to the other three plotting positions.  相似文献   

Recent Advances in Agent-Based Tsunami Evacuation Simulations: Case Studies in Indonesia,Thailand, Japan and Peru   总被引：1，自引：0，他引：1  

Erick Mas  Shunichi Koshimura  Fumihiko Imamura  Anawat Suppasri  Abdul Muhari  Bruno Adriano 《Pure and Applied Geophysics》2015,172(12):3409-3424

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An isolation system for limited seismic gaps in near‐fault zones          下载免费PDF全文

Mohammed Ismail 《地震工程与结构动力学》2015,44(7):1115-1137

The ability of a recently proposed seismic isolation system, with inherent self‐stopping mechanism, to mitigate or even eliminate seismic pounding of adjacent structures is investigated under severe near‐fault earthquakes. The isolation system is referred to as roll‐in‐cage (RNC) isolator. It is a rolling‐based isolator that provides in one unit the necessary functions of vertical rigid support, horizontal flexibility with enhanced stability, hysteretic energy dissipation, and resistance to minor vibration loads. In addition, the RNC isolator is distinguished by a self‐stopping (buffer) mechanism to limit the bearing displacement under excitations stronger than a design earthquake or at limited seismic gaps, and a linear gravity‐based self‐recentering mechanism to prevent permanent bearing displacement without causing vertical fluctuation of the isolated structure. A previously developed multifeature SAP2000 model of the RNC isolator is improved in this paper to account for the inherent buffer mechanism's damping. Then, the effectiveness of the isolator's buffer mechanism in limiting peak bearing displacements is studied together with its possibly arising negative influence on the isolation efficiency. After that, the study investigates how to alleviate or even eliminate those possibly arising drawbacks, due to the developed RNC isolator's inner pounding as a result of its buffer activation, to achieve efficient seismic isolation with no direct structure‐to‐structure pounding, considering limited seismic gaps with adjacent structures and near‐fault earthquakes. The results show that the RNC isolator could be an efficient solution for aseismic design in near‐fault zones considering limited seismic gaps. Earthquake Engineering and Structural Dynamics. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   

Decomposition of Methylene Blue on Transition Metals Doped SnO2 Nanoparticles          下载免费PDF全文

Mohamed M. Rashad  Adel A. Ismail  Inge Osama  Ibrahim A. Ibrahim  Abdel‐Hakim T. Kandil 《洁净——土壤、空气、水》2014,42(5):657-663

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Computerised development control and approval system for City Hall of Kuala Lumpur     

AhrisYaakup YazidAbuBakar MohdNuruddin AbdulKadir SusilawatiSulaiman 《地球空间信息科学学报》2004,7(1):39-49

This paper will discuss the computerised development control and approval system being developed for the Planning and Development Control Department, City Hall of Kuala Lumpur, with stress on the GIS architecture developed within the system. The prospects and challenges towards implementation of the system are also discussed.  相似文献   

Sea Level Variations and Geomorphological Changes in the Coastal Belt of Pakistan     

Tariq Masood Ali Khan  D. A. Razzaq  Qamar-Uz-Zaman Chaudhry  Dewan Abdul Quadir  Anwarul Kabir  Majajul Alam Sarker 《Marine Geodesy》2013,36(1-2):159-174

The UNEP in its regional seas program in 1989 has included Pakistan in a group of countries which are vulnerable to the impact of rising sea level. If the present trend of sea level rise (SLR) at Karachi continues, in the next 50 years the sea level rise along the Pakistan Coast will be 50 mm (5 cm). Since the rising rates of sea level at Karachi are within the global range of 1-2 mm/year, the trends may be treated as eustatic SLR. Historical air temperature and sea surface temperature (SST) data of Karachi also show an increasing pattern and an increasing trend of about 0.67°C has been registered in the air temperature over the last 35 years, whereas the mean SST in the coastal waters of Karachi has also registered an increasing trend of about 0.3°C in a decade. Sindh coastal zone is more vulnerable to sea level rise than Baluchistan coast, as uplifting of the coast by about 1-2 mm/year due to subduction of Indian Ocean plate is a characteristic of Baluchistan coast. Within the Indus deltaic creek system, the area nearby Karachi is more vulnerable to coastal erosion and accretion than the other deltaic region, mainly due to human activities together with natural phenomena such as wave action, strong tidal currents, and rise in sea level. Therefore, The present article deals mainly with the study of dynamical processes such as erosion and accretion associated with sea level variations along the Karachi coast and surrounding Indus deltaic coastline. The probable beach erosion in a decade along the sandy beaches of Karachi has been estimated. The estimates show that 1.1 mm/year rise in sea level causes a horizontal beach loss of 110 mm per year. Therefore, coast eroded with rise in sea level at Karachi and surrounding sandy beaches would be 1.1 m during a period of next 10 years. The northwestern part of Indus delta, especially the Gizri and Phitti creeks and surrounding islands, are most unstable. Historical satellite images are used to analyze the complex pattern of sediment movements, the change in shape of coastline, and associated erosion and accretion patterns in Bundal and Buddo Islands. The significant changes in land erosion and accretion areas at Bundal and Buddo Islands are evident and appear prominently in the images. A very high rate of accretion of sediments in the northwestern part of Buddo Island has been noticed. In the southwest monsoon season the wave breaking direction in both these islands is such that the movement of littoral drift is towards west. Erosion is also taking place in the northeastern and southern part of Bundal Island. The erosion in the south is probably due to strong wave activities and in the northeast is due to strong tidal currents and seawater intrusion. Accretion takes place at the northwest and western parts of Bundal Island. By using the slope of Indus delta, sea encroachment and the land area inundation with rising sea level of 1 m and 2 m have also been estimated.  相似文献   

Concentration of selected radionuclides in seawater from Kuwait     

Uddin S  Al Ghadban AN  Aba A  Behbehani M 《Marine pollution bulletin》2012,64(6):1261-1264

No baseline existed for the radionuclides in Kuwait territorial water. With changing trend in the region to embrace nuclear energy, the baseline study is imperative to create a reference and to record the influence-functioning of upcoming power plants. The first one in Bushehr, Iran is ready to start and several more are likely to come-up in UAE, Saudi Arabia and Kuwait. The present baseline concentration of the four considered radionuclide's show low concentration of tritium, polonium, strontium and cesium; their concentration is comparable to most oceanic waters.  相似文献   

Comparative Performance of Water Hyacinth (Eichhornia crassipes) and Water Lettuce (Pista stratiotes) in Preventing Nutrients Build‐up in Municipal Wastewater          下载免费PDF全文

Zubaidah Ismail  Siti Zulaikha Othman  Kim Hing Law  Abdul Halim Sulaiman  Roslan Hashim 《洁净——土壤、空气、水》2015,43(4):521-531

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Salinity Tolerance in Wheat Cultivars Is Related to Enhanced Activities of Enzymatic Antioxidants and Reduced Lipid Peroxidation          下载免费PDF全文

Abdul Khaliq  Muhammad Zia‐ul‐Haq  Faizan Ali  Farhena Aslam  Amar Matloob  Abubakr Navab  Saddam Hussain 《洁净——土壤、空气、水》2015,43(8):1248-1258

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Biodegradation of 2,4‐Dichlorophenoxyacetic Acid Contaminated Soil in a Roller Slurry Bioreactor          下载免费PDF全文

Yasmen A. Mustafa  Hayder M. Abdul‐Hameed  Zainab Abdul Razak 《洁净——土壤、空气、水》2015,43(8):1241-1247

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