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| 1 | 基于低秩矩阵恢复的去噪方法在石油测井中的应用显示文摘随着测井技术的发展,各大油田采集和存储的测井数据量呈井喷式增长,并存在大量冗余和噪声,在进行油气层识别前必须对测井数据进行压缩和去噪等预处理。低秩矩阵恢复(Low-Rank Matrix Recovery,LRMR)理论将压缩感知(Compressed Sensing,CS)中向量样例的稀疏表示推广到矩阵的低秩情形,从较大但稀疏的误差中恢复出本质上低秩的数据矩阵,可更好地保持数据结构,提高去噪效果。因此将低秩矩阵恢复理论中的去噪方法应用于石油测井中,实现对测井数据的去噪处理。对比研究了加速近端梯度算法(Accelerate Proximal Gradient,APG)、精确增广拉格朗日乘子(Exact Augmented Lagrange Multipliers,EALM)法和非精确增广拉格朗日乘子法(Inexact Augmented Lagrange Multipliers,IALM)在测井数据中的去噪效果,对去噪前后的测井数据分别采用支持向量机(Support Vector Machine,SVM)和相关向量机(Relevance Vector Machine,RVM)进行油气层识别,结果表明,与不去噪情况相比,利用三种算法进行去噪处理后油气层识别精度都有了显著提升。通过参数优化减少迭代次数,可使得IALM算法在运算时间上优于EALM算法和APG算法,明显提高了运算效率。 | 王艳伟 夏克文 牛文佳 Ali Ahamd | 2017 | 石油物探2017，56，5： | 3 |
| 2 | Bio-ecology of malaria vectors in an endemic area,Southeast of Iran显示文摘Objective:To determine some bio-ecological aspects of malaria vectors in Jask County,where is targeted for malaria elimination in the national program.Methods:Mosquitoes were collected monthly during 2013-2014 using different collection methods.Subsequently,ELISA test was used to detect the human blood index of mosquitoes.The susceptibility status of Anopheles stephensi was evaluated against the diagnostic dosages of seven WHO recommended insecticides.Results:A total of 3 650 female and 4 736 Anopheles larvae were collected including Anopheles stephensi,Anopheles culicifacies s.l.,Anopheles dthali.Anopheles fluviatilis s.l.,Anopheles moghulensis and Anopheles turkhodi species.Anopheles stephensi was the dominant collected species on human baits and indoors with high rate of unfed and gravid specimens in internal and external window traps.Human blood index was calculated as 14.3%for this species.It was also found to be resistant to DDT and Dieldrin.Conclusions:The collected species had a wide range of habitats,and resting behaviors.With regarding to the presence of most important malaria vectors in Jask.control of the disease may be so complicated;as based on the weather condition it can be transmitted during the whole year,except for cold months.With this strong potential of transmission,existing population movements in the area may lead to imported cases of malaria and local outbreak(s).So,more specific studies on malaria vectors in high risk areas of Jask County are recommended. | Masoud Yeryan Hamid Rreza Basseri Ahamd Ali Hanafi-Bojd Ahmad Raeisi Hamideh Edalat Reza Safari | 2016 | Asian Pacific Journal of Tropical Medicine2016，9，1： | 2 |
| 3 | Characterization of planar cubic alternative curve显示文摘 | Ahamd A Gobithaasan R U Ali J M | 2009 | Matematika UTM2009，25，2： | 1 |
| 4 | Bio-ecology of malaria vectors in an endemic area, Southeast of Iran显示文摘 | Masoud Yeryan Hamid Rreza Basseri Ahamd Ali Hanafi-Bojd Ahmad Raeisi Hamideh Edalat Reza Safari | 2015 | Asian Pacific Journal of Tropical Medicine2015，，： | 1 |
| 5 | Efficacy, predictability, and safety of wavefront-guided refractive laser treatment: Metaanalysis显示文摘 | Usama Fares Hanif Suleman Mouhamed Ali Al-Aqaba Ahamd Muneer Otri Dalia G. Said Harminder S. Dua | 2011 | Journal of Cataract & Refractive Surgery2011，，8： | 1 |
| 6 | Conceptual Method of Temperature Sensation in Bionic Hand by Extraordinary Perceptual Phenomenon显示文摘Lack of temperature sensation of myoelectric prosthetic hand limits the daily activities of amputees.To this end,a noninvasive temperature sensation method is proposed to train amputees to sense temperature with psychophysical sensory substitution.In this study,22 healthy participants took part besides 5 amputee participants.The duration time of the study was 31 days with five test steps according to the Leitner technique.An adjustable temperature mug and a Peltier were used to change the temperature of the water/phantom digits to induce temperature to participants.Also,to isolate the surroundings and show colors,a Virtual Reality(VR)glass was employed.The statistical results conducted are based on the response of participants with questionnaire method.Using Chi-square tests,it is concluded that participants answer the experiment significantly correctly using the Leitner technique(P value<0.05).Also,by applying the“Repeated Measures ANOVA”,it is noticed that the time of numbness felt by participants had significant(P value<0.001)difference.Participants could remember lowest and highest temperatures significantly better than other temperatures(P value<0.001);furthermore,the well-trained amputee participant practically using the prosthesis with 72.58%could identify object’s temperature with only once time experimenting the color temperature. | Saeed Bahrami Moqadam Ahamd Saleh Asheghabadi Farzaneh Norouzi Hamed Jafarzadeh Ali Khosroabadi AfshinAlagheband Ghazal Bangash Negar Morovatdar Jing Xu | 2021 | Journal of Bionic Engineering2021，18，6： | 0 |
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