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International journal of engineering. Transactions A: basics最新文献

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Single Image Dehazing Algorithm Based on Dark Channel Prior and Inverse Image 基于暗通道先验和逆图像的单幅图像去雾算法
International journal of engineering. Transactions A: basics Pub Date : 2017-07-07 DOI: 10.5829/ije.2017.30.10a.07
Xiao Zhou, L. Bai, Chengyou Wang
{"title":"Single Image Dehazing Algorithm Based on Dark Channel Prior and Inverse Image","authors":"Xiao Zhou, L. Bai, Chengyou Wang","doi":"10.5829/ije.2017.30.10a.07","DOIUrl":"https://doi.org/10.5829/ije.2017.30.10a.07","url":null,"abstract":"The sky regions of foggy image processed by all the existing conventional dehazing methods are degraded by color distortion and severe noise. This paper proposes an improved algorithm which combines dark channel prior and inverse image. We first invert the foggy image, and then estimate the transmission of the inverse image. At last, compared with the non-inversed transmission, the larger values of the transmission are the final transmission. This algorithm tends to refine the medium transmission by adjusting the values of pixels in the bright region to meet the hypothesis of dark channel prior. The method is viable to eliminate color distortion of the dehazed image.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124248630","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
Variational Iteration Method for Free Vibration Analysis of a Timoshenko Beam under Various Boundary Conditions 不同边界条件下Timoshenko梁自由振动分析的变分迭代法
International journal of engineering. Transactions A: basics Pub Date : 2017-07-07 DOI: 10.5829/ije.2017.30.10a.18
K. Torabi, M. Ghassabi, M. Heidari-Rarani, Sharifi
{"title":"Variational Iteration Method for Free Vibration Analysis of a Timoshenko Beam under Various Boundary Conditions","authors":"K. Torabi, M. Ghassabi, M. Heidari-Rarani, Sharifi","doi":"10.5829/ije.2017.30.10a.18","DOIUrl":"https://doi.org/10.5829/ije.2017.30.10a.18","url":null,"abstract":"In this paper, a relatively new method, namely variational iteration method (VIM), is developed for free vibration analysis of a Timoshenko beam with different boundary conditions. In the VIM, an appropriate Lagrange multiplier is first chosen according to order of the governing differential equation of the boundary value problem, and then an iteration process is used till the desired accuracy is achieved. Solution of VIM for natural frequencies and mode shapes of a Timoshenko beam is compared to the available exact closed-form solution and numerical results of differential quadrature method (DQM). The accuracy of VIM is approximately the same as exact solution and much better than the DQM for solving the free vibration of a Timoshenko beam. Also, convergence speed and simplicity of this method is more than the other two methods because it works with polynomial at the first iteration. Thus, VIM can be used for solving the complicate engineering problems which do not have analytical solution.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130217715","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: 9
The Influence of Short Values of Hydraulic and Sludge Retention Time on Performance of a Membrane Bioreactor Treating Sunflower Oil Refinery Wastewater 水力和污泥停留时间短对膜生物反应器处理葵花籽油废水性能的影响
International journal of engineering. Transactions A: basics Pub Date : 2017-07-07 DOI: 10.5829/ije.2017.30.10a.01
P. Ghasemian, E. Sharghi, L. Davarpanah
{"title":"The Influence of Short Values of Hydraulic and Sludge Retention Time on Performance of a Membrane Bioreactor Treating Sunflower Oil Refinery Wastewater","authors":"P. Ghasemian, E. Sharghi, L. Davarpanah","doi":"10.5829/ije.2017.30.10a.01","DOIUrl":"https://doi.org/10.5829/ije.2017.30.10a.01","url":null,"abstract":"In this work, the performance of organic pollutant removal, membrane fouling and sludge morphology in a submerged membrane bioreactor (MBR) treating sunflower oil refinery wastewater (SORW) containing high oleic content was studied during 52 days’ operation at short values of 18 h and 10 days for hydraulic retention time and sludge retention time, respectively. The removal efficiencies of chemical oxygen demand (COD), oil and grease (O&G) and turbidity were found to be 73.2±6.6%, 75.1±2.5%, and 99.7±0.1%, respectively and the need for membrane cleaning never rose. The results showed a statistically significant linear correlation between the mixed liquor O&G with soluble microbial products and extracellular polymeric substances (EPS) (rP=0.792; p-value=0.034 and rP=0.920; p-value=0.003, respectively). Additionally, increase in MLVSS concentration which was due to an increase in cell concentration and was not related to accumulation of O&G and biopolymers inside the bioreactor, increased specific oxygen uptake rate. The trend of changes in sludge volume index (SVI) and supernatant turbidity (ST) with EPStotal was also found to be statistically significant (rP=0.736; p-value=0.037 and rP=0.773; p-value=0.024, respectively). The results of SVI, ST, EPS, particle size distribution and microscopic observation showed change in sludge morphology to flocs of smaller size (unimodal, with mode of 20 μm) with high compressibility (SVI=44.0 mL g MLSS) and bioflocculating ability (ST=20.4±3.3 NTU). The results of the present study were indicative of a very good potential of the MBR for treatment of SORWs. doi: 10.5829/ije.2017.30.10a.01","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124687683","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: 12
Effect of Underwater Ambient Noise on Quadraphase Phase-shift Keying Acoustic Sensor Network Links in Extremely Low Frequency Band 水下环境噪声对极低频四相移相键控声传感器网络链路的影响
International journal of engineering. Transactions A: basics Pub Date : 2017-06-22 DOI: 10.5829/ije.2017.30.07a.07
N. Bahrami, N. H. Khamis, A. Yahya, A. Baharom
{"title":"Effect of Underwater Ambient Noise on Quadraphase Phase-shift Keying Acoustic Sensor Network Links in Extremely Low Frequency Band","authors":"N. Bahrami, N. H. Khamis, A. Yahya, A. Baharom","doi":"10.5829/ije.2017.30.07a.07","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.07","url":null,"abstract":"This study evaluates the impact of underwater ambient noise using seven real noise samples; Dolphin, Rain, Ferry, Sonar, Bubbles, Lightning, and Outboard Motor in three frequency ranges in extremely low frequency (ELF) band. The ELF band is the most significant bandwidth for underwater long-range communication. ELF band which is extended from 3 to 3000 Hz clearly, faces bandwidth limitation. Measuring the impact of noises that are imposed on this bandwidth, based on center frequency employment is highly regarded. This measurement optimizes detection process and assists the design of more reliable underwater communication systems and will improve network quality of service (QoS). In this investigation, Quadraphase Phase-shift Keying (QPSK) acoustic communication nodes are designed in MATLAB and real noise samples are added to network link. Three frequency bands are defined (0-1600), (400-2000) and (1600-3200) Hz, then the impact of noise samples on phase is measured. Next, ( ) ratio for every bandwidth (BW) is simulated. The result demonstrates 0 to 1600 Hz band is the nosiest part of the ELF band. This study discovered the Bubble noise sample from the environmental noise; Ferry from man-made noise and the Dolphin in mammal’s noise have the greatest impact on 0 to 1600 Hz bandwidth.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124881507","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: 1
Designing an Economic Repetitive Sampling Plan in the Presence of Two Markets 在两个市场存在下设计经济的重复抽样计划
International journal of engineering. Transactions A: basics Pub Date : 2017-05-22 DOI: 10.5829/ije.2017.30.07a.11
M. Fallahnezhad, T. JafariNodoushan, M. Owlia, M. H. Abooie
{"title":"Designing an Economic Repetitive Sampling Plan in the Presence of Two Markets","authors":"M. Fallahnezhad, T. JafariNodoushan, M. Owlia, M. H. Abooie","doi":"10.5829/ije.2017.30.07a.11","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.11","url":null,"abstract":"In this paper, we develop an optimization model for the economic design of repetitive sampling plan in the presence of two markets. The process under consideration produces a product with a normally distributed quality characteristic with unknown mean and known variance. The quality characteristic has a lower specification limit. The quality of the product is controlled via lot-by-lot acceptance sampling plan. The objective function used in the model is maximizing profit and product conformity using the Taguchi loss function as a surrogate for product conformity. Risks of producer and consumer in two different markets are considered as constraints. We demonstrate the application of the model using a numerical example. Sensitivity analysis on model parameters shows that the result of the model is sensitive to changes in model parameters.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131549163","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
Batch Study on COD and Ammonia Nitrogen Removal Using Granular Activated Carbon and Cockle Shells 颗粒活性炭与贝壳对COD和氨氮的批量去除研究
International journal of engineering. Transactions A: basics Pub Date : 2017-05-16 DOI: 10.5829/ije.2017.30.07a.02
Z. Daud, M. Abubakar, A. A. Kadir, A. Latiff, H. Awang, Azhar Abdul Halim, A. Marto
{"title":"Batch Study on COD and Ammonia Nitrogen Removal Using Granular Activated Carbon and Cockle Shells","authors":"Z. Daud, M. Abubakar, A. A. Kadir, A. Latiff, H. Awang, Azhar Abdul Halim, A. Marto","doi":"10.5829/ije.2017.30.07a.02","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.02","url":null,"abstract":"Landfills generate leachate that contains elevated concentration of contaminants and is hazardous to \u0000human health and the ecosystem. In this study, the mixture of granular activated carbon and cockle \u0000shells was investigated for remediation of COD and ammonia from stabilized landfill leachate. All \u0000adsorbent media were sieved to a particle size between 2.00 and 3.35 mm. The optimum mixing ratio, \u0000shaking speed, shaking time, pH, and dosage were determined. Characterization results show that the \u0000leachate had a high concentration of COD (1763 mg/L), ammonia nitrogen (573 mg/L), and \u0000BOD5/COD ratio (0.09). The optimum mixing ratio of granular activated carbon and cockle shells was \u000020:20, shaking speed 150 rpm, pH level 6, shaking time 120 min, and dosage 32 g. The adsorption \u0000isotherm analysis reveals that the Langmuir isotherm yielded the best fit to experimental data as \u0000compared with the Freundlich isotherm. The media produce encouraging results and can be used as a good and economical adsorbent.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134488932","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: 21
A New Mathematical Model To Optimize A Green Gas Network: A Case Study 一种新的优化绿色燃气网络的数学模型:一个案例研究
International journal of engineering. Transactions A: basics Pub Date : 2017-05-14 DOI: 10.5829/ije.2017.30.07a.12
M. Fallah, A. Mohajeri, Mohammad Barzegar-Mohammadi
{"title":"A New Mathematical Model To Optimize A Green Gas Network: A Case Study","authors":"M. Fallah, A. Mohajeri, Mohammad Barzegar-Mohammadi","doi":"10.5829/ije.2017.30.07a.12","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.12","url":null,"abstract":"Global warming created by large scale emissions of Greenhouse Gases (GHG) are a worldwide concern. Due to this, the issue of green gas network has required more attention in the last decades. Here, we address the GHG-based problem that arises in a gas network where gas flow is transferred from the Town Board Station (TBS) to consumers by pipeline systems. Given this environment, an optimization model for a gas network in which GHG emission is expressed in term of environmental constraints is developed. Here, we formulate a gas network considering profitability and ecological goals to achieve sustainable development. To solve the model accurately, in small and medium sizes, we use GAMS 23.2 software and compare their results with the result of a metaheuristic algorithm (Hybrid GA/SA). The results show that the proposed algorithm is able to produce better answers in shorter time for large-scale problems. A case study in Mazandaran Gas Company in Iran is conducted to illustrate the validity and effectiveness of the proposed approach.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125468113","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: 4
Analysis of Milling Process Parameters and their Influence on Glass Fiber Reinforced Polymer Composites (RESEARCH NOTE) 铣削工艺参数及其对玻璃纤维增强聚合物复合材料的影响分析(研究笔记)
International journal of engineering. Transactions A: basics Pub Date : 2017-04-21 DOI: 10.5829/ije.2017.30.07a.17
I. Prasanth, D. Ravishankar, M. Hussain
{"title":"Analysis of Milling Process Parameters and their Influence on Glass Fiber Reinforced Polymer Composites (RESEARCH NOTE)","authors":"I. Prasanth, D. Ravishankar, M. Hussain","doi":"10.5829/ije.2017.30.07a.17","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.17","url":null,"abstract":"Milling of fiber reinforced polymer composites is of great importance for integrated composites with other mating parts. Improper selection of cutting process parameters, excessive cutting forces and other machining conditions would result in rejection of components. Therefore, machining conditions are optimized to reduce the machining forces and damages. This work reports practical experiments in milling, to study the effect of machining conditions on cutting force, surface roughness and damage factor of Glass Fiber Reinforced Polymer (GFRP) composites. The experiments were carried out with a designed carbide end mill tool by a random set of milling process parameters. The results showed that machined surface integrity was highly influenced by the spindle speed followed by the feed rate. The results of the experiments were illustrated and analyzed by interaction plots and Scanning Electron Microscope (SEM) images. doi: 10.5829/ije.2017.30.07a.17","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128615477","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: 8
Sedimentation Stability of Oil Well Cements in Directional Wells (TECHNICAL NOTE) 定向井中油井水泥的沉降稳定性(技术说明)
International journal of engineering. Transactions A: basics Pub Date : 2017-04-21 DOI: 10.5829/idosi.ije.2017.30.07a.21
S. T. Moradi, N. Nikolaev
{"title":"Sedimentation Stability of Oil Well Cements in Directional Wells (TECHNICAL NOTE)","authors":"S. T. Moradi, N. Nikolaev","doi":"10.5829/idosi.ije.2017.30.07a.21","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.07a.21","url":null,"abstract":"Unsuccessful cementing operation can jeopardize the whole well construction process, resulting in further costly and time consuming repair operations. The quality of cementing job is dependent on the cement composition and its properties. Design of cement composition is based on the available geological condition, materials and technical situation at well location. The cement properties like flow-ability and strength properties are tested by laboratory methods before application in field conditions. Study of the slurry sedimentation stability is of great importance especially for construction of directional or horizontal wells. There is no convenient direct method to investigate the sedimentation stability of the cements. In this paper, a laboratory method is presented to assess the stability of the slurry by measuring its free fluid content. Laboratory investigations are expanded to study the effect of different additives (weighting agent, silica sand, silica flour and magnesium oxide) and well inclination angle on the sedimentation stability of the slurries. Results show that additive specific surface area plays a significant role in the stability of the cements and therefore should be measured for every additive precisely.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133658924","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: 8
Settlements and Consolidation Rates under Embankments in a Soft Soil with Vertical Drains 垂直排水软土路堤沉降与固结速率
International journal of engineering. Transactions A: basics Pub Date : 2017-04-21 DOI: 10.5829/ije.2017.30.07a.06
F. Kassou, J. Benbouziyane, A. Ghafiri, A. Sabihi
{"title":"Settlements and Consolidation Rates under Embankments in a Soft Soil with Vertical Drains","authors":"F. Kassou, J. Benbouziyane, A. Ghafiri, A. Sabihi","doi":"10.5829/ije.2017.30.07a.06","DOIUrl":"https://doi.org/10.5829/ije.2017.30.07a.06","url":null,"abstract":"In this paper, a study was carried out in order to estimate settlements and consolidation rates under embankments constructed on Moroccan soft soils.  Settlement measurements in several embankments in High Speed Railway project between two Moroccan cities, Tangier and Assilah,  were analyzed. The objective of this study is to estimate settlement values and settlement rates, with sufficient precision, in soft soils under embankment loadings. It was found  that the elastic method using  the pressuremeter modulus results in more accurate settlement values than the oedometric method. Furthermore, settlement rates could be determined with fair accuracy by using a correlation between the vertical coefficient of consolidation and the liquid limit, and also by considering an isotropic behavior of soil.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123176652","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: 5
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