维普中文期刊产品整合服务
57篇 您的检索式:作者名="Rostam"
    题名 作者 年代 出处 被引量
1Precipitation forecasting by large-scale climate indices and machine learning techniques显示文摘Global warming is one of the most complicated challenges of our time causing considerable tension on our societies and on the environment.The impacts of global warming are felt unprecedentedly in a wide variety of ways from shifting weather patterns that threatens food production,to rising sea levels that deteriorates the risk of catastrophic flooding.Among all aspects related to global warming,there is a growing concern on water resource management.This field is targeted at preventing future water crisis threatening human beings.The very first stage in such management is to recognize the prospective climate parameters influencing the future water resource conditions.Numerous prediction models,methods and tools,in this case,have been developed and applied so far.In line with trend,the current study intends to compare three optimization algorithms on the platform of a multilayer perceptron(MLP)network to explore any meaningful connection between large-scale climate indices(LSCIs)and precipitation in the capital of Iran,a country which is located in an arid and semi-arid region and suffers from severe water scarcity caused by mismanagement over years and intensified by global warming.This situation has propelled a great deal of population to immigrate towards more developed cities within the country especially towards Tehran.Therefore,the current and future environmental conditions of this city especially its water supply conditions are of great importance.To tackle this complication an outlook for the future precipitation should be provided and appropriate forecasting trajectories compatible with this region's characteristics should be developed.To this end,the present study investigates three training methods namely backpropagation(BP),genetic algorithms(GAs),and particle swarm optimization(PSO)algorithms on a MLP platform.Two frameworks distinguished by their input compositions are denoted in this study:Concurrent Model Framework(CMF)and Integrated Model Framework(IMF).Through these two frameworks,13 cases are generated:12 cases within CMF,each of which contains all selected LSCIs in the same lead-times,and one case within IMF that is constituted from the combination of the most correlated LSCIs with Tehran precipitation in each lead-time.Following the evaluation of all model performances through related statistical tests,Taylor diagram is implemented to make comparison among the final selected models in all three optimization algorithms,the best of which is found to be MLP-PSO in IMF.Mehdi GHOLAMI ROSTAM Seyyed Javad SADATINEJAD Arash MALEKIAN 2020Journal of Arid Land2020,12,5:2
2Disc cutting tests in Colorado Red Granite:Implications for TBM performance prediction显示文摘Gertscha R Gertschb L Rostamic J 2007International Journal of Rock Mechanics and Mining Sciences2007,44,:1
3Service life design-the European approach显示文摘Rostam S 1993Concrete International1993,,:1
4Madon path ways for Y zeolite destruction: the role of sodium and vanadium显示文摘Xu Mingting Liu Xinsheng Rostam J 2002Journal ofCatalysis2002,207,2:1
5Time consumption,productivity,and cost analysis of skidding in the Hyrcanian forest in Iran显示文摘The performance of the skidder Timber jack 450 C was presented in timber skidding of non-coniferous trees in hilly and mountainous conditions.An empirical time study was conducted to evaluate the current skidding system in Hyrcanian forest in northern Iran for improving production rate of skidding and finding out the production cost for planning.Based on the identified elements of skidding work phase and 130 recorded cycles,we calculated the models for effective time consumption,total productivity,and unit cost.The validity of the model was tested at 95% confidence interval.The average load volume per cycle was 2.82 m 3,average one way skidding distance was 450 m,and the average slope was 18%.The average travel speed of unloaded skidder was 5.8 km·h-1,and the average speed of loaded skidder was 0.1 km·h-1 higher than the speed of the unloaded ones.The travel speed was predominantly affected by longitudinal slopes and types of strip roads.The average speed of pulling the cable was 1.16 km·h-1,and that of load winching was 0.74 km·h-1.The average outputs in skidding was 10.6 m 3 ·h-1 and the unit cost was 12.1 US$ per hour.The time consumption and productivity of skidding depends on distances and slope,number of logs per cycle,volume,log length,etc.However,the influence of variables is not the same.Rostam Mousavi 2012Journal of Forestry Research2012,23,4:1
6校园环境景观在学习过程中的辅助作用显示文摘一个优美的校园景观不仅直接有利于美化校园环境,也能间接在师生学习过程中提供相应的辅助作用,如提供休闲空间,与景观要素的相互作用,以及户外课程的顺利开展。本文旨在分析学校的景观环境和学习过程之间的关系,以及自然环境对学生审美素质的影响。出于这一目的,巴生冷月谷随机选择104个学校,主要数据收集通过实地观察,并与来自不同机构的相关数据相结合。皮尔森对相关性检验结果表明:中等水平的景观功能在辅助学习过程中有显著的相关性。李富彬 Salina Mohamed Alia Katiman Rostam Abd.Hair Awang 2016艺术科技2016,29,6:1
7A fuzzy AHP -ANN -based decision support system for machine tool selection in a flexible manufactur- ing cell 显示文摘Zahari Taha Sarkawt Rostam 2011The International Journal of Advanced Manufacturing Technology2011,57,58:1
8Design and Construction of Segmental Concrete Bridges for Service Life of 100 to 150 Years显示文摘Rostam Steen 2006American Segmental Bridge Institute2006,,:1
9Role of rare earth cations in Y zeo- lite for hydrocarbon cracking 显示文摘Sanchez C M A Rostam J M 2005J Phyms Chem : B2005,109,6:1
10A fuzzy AHP-ANN-based decision sup- port system for machine tool selection in a flexible manufac- turing cell 显示文摘Taha Z S Rostam 2011The International Journal of Advanced Manu- facturing Technology2011,57,58:1
11Disc cutting tests in Colorado Red Granite:implications for TBM performance prediction显示文摘GERTSCHA R GERTSCHB L ROSTAMIC J 2007International Journal of Rock Mechanics and Mining Sciences2007,44,2:1
12Service life design-the European approach显示文摘ROSTAM S 1993Concr Int1993,15,7:1
13Fabrication and characterization of novel antifoul- ing nanofiltration membrane prepared from oxidized multi- walled carbon nanotu'be/polyethersulfone nanocomposite 显示文摘Vahid Vatanpour Sayed Siavash Madaeni Rostam Moradi- an 2011Journal of Membrane Science2011,375,:1
14Service life design - the European approach显示文摘ROSTAM S 1993Coner lnt1993,15,7:1
15Transport-enhanced α-olefin readsorption pathways in Ru-catalyzed hydrocarbon synthesis显示文摘Enrique I Sebastian C R Rostam J M 1991Journal of Catalysis1991,129,1:1
16Three-dimensional oscillation of an acoustic microbubble between two rigid curved plates显示文摘Understanding the near boundary acoustic oscillation of microbubbles is critical for the effective design of ultrasonic biomedical devices and surface cleaning technologies.Accordingly,this study investigates the three-dimensional microbubble oscillation between two curved rigid plates experiencing a planar acoustic field using boundary integral method(BIM).The numerical model is validated via comparison with the nonlinear oscillation of the bubble governed by the modified Rayleigh-Plesset equation and with the axisymmetric model for an acoustic microbubble in infinite fluid domain.Then,the influence of the wave direction and horizontal standoff distance(h)on the bubble dynamics(including jet velocity,jet direction,centroid movement,total energy,and Kelvin impulse)were evaluated.It was concluded that the jet velocity,the maximum radius and the total energy of the bubble are not significantly influenced by the wave direction,while the jet direction and the high-pressure region depend strongly on it.More importantly,it was found that the jet velocity and the high-pressure region around the jet in acoustic bubble are drastically larger than their counterparts in the gas bubble.Kawa M.A.Manmi Imad A.Aziz Arun Arjunan Rostam K.Saeed Abdolrahman Dadvand 2021Journal of Hydrodynamics2021,33,5:1
17Dynamic modeling of an adsorption storage tank using a hybrid approach combining computational fluid dynamics and process simulation 显示文摘J P B Motaa I A A C Esteves M Rostam - Abadi 2004Computers and Chemical Engineering2004,,28:1
18Service life design: the European approach显示文摘Rostam S 1993Concrete International1993,15,7:1
19Service life design:the european approach显示文摘 1993Concrete International1993,15,7:1
20“‘Novel food’ for thought” on law and policymaking in the global creative economy显示文摘Rostam J. Neuwirth 2014European Journal of Law and Economics2014,,1:1
返回顶部 每页显示:
共3页 首页 上一页 第1页 下一页 末页 /3 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费