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Application of response surface methodology and central composite rotatable design for modeling the influence of some operating variables of the lab scale thickener performance

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International Journal of Mining Science and Technology 2013年第5期23卷 717-724页

作者： Aghajani Shahrivar Alireza Soltani Goharrizi Ataallah Ebrahimzadeh Gheshlaghi Majid Sarafi Amir Razmirad mohammad Abdollahi hadi Department of Chemical Engineering University of Shahid Bahonar School of Mining Engineering College of EngineeringUniversity of Tehran

This study discussed the application of response surface methodology(RSM)and central composite rotatable design(CCRD)for modeling and optimization of the influence of some operating variables on the performance of a lab scale thickener for dewatering of tailing in the flotation *** thickener operating variables,namely feed flowrate,solid percent,flocculant dosage and feedwell height were changed during the tests based on *** ranges of values of the thickener variables used in the design were a feed flowrate of 9–21 L/min,solid percent of 8%–20%,flocculant dosage of 1.25–4.25 g/t and feedwell height of 16–26 cm.A total of 30 thickening tests were conducted using lab scale thickener on flotation tailing obtained from the Sarcheshmeh copper mine,*** underflow solid percent and bed height were expressed as functions of four operating parameters of *** values were found to be in good agreement with experimental values(R2values of 0.992 and 0.997 for underflow solid percent and bed height,respectively).This study has shown that the RSM and CCRD could effciently be applied for the modeling of thickener for dewatering of flotation tailing.

关键词： Response surface methodology Central composite rotatable design Modeling Thickener

Simultaneous determination of cysteamine and folic acid in pharmaceutical and biological samples using modified multiwall carbon nanotube paste electrode

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Chinese Chemical Letters 2012年第2期23卷 237-240页

作者： Ali Taherkhani Hassan Karimi-Maleh Ali A.Ensafi hadi Beitollahi Ahmad Hosseini mohammad A.Khalilzadeh Hassan Bagheri Department of Physics Takestan Branchlslamic Azad UniversityTakestanlran Department of Chemistry Majlesi BranchIslamic Azad UniversityIsfahanIran Environment Department Research Institute of Environmental SciencesInternational Center for ScienceHigh Technology and Environmental SciencesKermanIran Department of Chemistry Qaemshahr BranchIslamic Azad UniversityQaemshahrlran Department of Chemistry Takestan Branchlslamic Azad UniversityTakestanlran

A carbon paste electrode（CPE） chemically modified with multiwall carbon nanotubes and ferrocene（FC） was used as a selective electrochemical sensor for the simultaneous determination of trace amounts of cysteamine（CA） and folic acid（FA）.This modified electrode showed very efficient electrocatalytic activity for the anodic oxidation of *** peak current of differential pulse voltammograms of CA and FA increased linearly with their concentration in the ranges of 0.7-200μmol/L CA and 5.0- 700μmol/L *** detection limits for CA and FA were 0.3μmol/L and 2.0μmoI/L,*** diffusion coefficient（D） and transfer coefficient（α） of CA were also *** conditions are sufficient to allow determination of CA and FA both individually and simultaneously.

关键词： Cysteamine Folic acid Carbon nanotube paste electrode Voltammetry

采用响应面方法和中心复合旋转设计对低品位锰矿浸出过程建模与优化(英文)

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Transactions of Nonferrous Metals Society of China 2012年第9期22卷 2295-2305页

作者： Dariush AZIZI Sied Ziaedin SHAFAEI mohammad NOAPARAST hadi ABDOLLAHI School of Mining University College of EngineeringUniversity of TehranTehranIran

采用实验设计软件对从低品位锰矿中浸出提取锰的过程进行优化。在中心复合响应面实验设计中,考察了4个主要影响浸出过程的参数,即硫酸浓度、草酸浓度、浸出时间和温度。将锰和铁的浸出率作为考察指标。采用统计分析和方差分析确定了最... 详细信息

采用实验设计软件对从低品位锰矿中浸出提取锰的过程进行优化。在中心复合响应面实验设计中,考察了4个主要影响浸出过程的参数,即硫酸浓度、草酸浓度、浸出时间和温度。将锰和铁的浸出率作为考察指标。采用统计分析和方差分析确定了最优条件,即最高的锰和铁浸出率、最短的浸出时间和最低的温度。结果表明,硫酸浓度是影响浸出过程的最显著的参数,在最优条件下:硫酸浓度7%,草酸浓度42.5g/L,浸出时间60min,反应温度65℃,锰和铁的浸出率可分别达到93.44%和15.72%。

关键词：响应面方法浸出锰优化建模

汽车平台电动转向系统的优化设计及适用性（英文）

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Journal of Central South University 2019年第4期26卷 839-851页

作者： Abolfazl KHALKHALI mohammad Hassan SHOJAEEFARD Masoud DAHMARDEH hadi SOTOUDEH Automotive Simulation and Optimal Design Research Laboratory School of Automotive EngineeringIran University of Science and Technology

对更好的燃油经济性和降低汽车尾气污染的持续需求增加了电动转向(EPS)在汽车中的应用。产品系列的EPS优化设计可大大降低开发和制造成本。本文采用TOPSIS和NSGA-Ⅱ相结合的方法,寻找汽车平台EPS的最优系列,提出了一个多目标优化问题.... 详细信息

对更好的燃油经济性和降低汽车尾气污染的持续需求增加了电动转向(EPS)在汽车中的应用。产品系列的EPS优化设计可大大降低开发和制造成本。本文采用TOPSIS和NSGA-Ⅱ相结合的方法,寻找汽车平台EPS的最优系列,提出了一个多目标优化问题.该问题将道路感、转向便携性、Ackerman误差的均方根和产品系列罚函数作为相互制约的目标函数。给出了单目标优化问题和多目标优化问题的结果,并提出了两个折衷设计点,进行了比较和讨论。对于这两个折衷设计点,一个目标函数的性能下降了约1%,而共性增加了20%～40%,说明了该方法在首先找到非主导设计点,然后在得到的点之间进行权衡的有效性。结果表明,所得到的折衷点在公共部件数量最大的产品系列中具有较好的性能。

关键词：产品系列优化最优平台设计 NSGA-Ⅱ TOPSIS 电动助力转向

Optimal Control Strategy for a Fully Determined HIV Model

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Intelligent Control and Automation 2010年第1期1卷 15-19页

作者： mohammad Shirazian mohammad hadi Farahi 不详

This paper shows how mathematical methods can be implemented to formulate guidelines for clinical testing and monitoring of HIV/AIDS disease. First, a mathematical model for HIV infection is presented which the measurement of the CD4+T cells and the viral load counts are needed to estimate all its parameters. Next, through an analysis of model properties, the minimal number of measurement samples is obtained. In the sequel, the effect of Reverse Transcriptase enzyme Inhibitor (RTI) on HIV progression is demonstrated by using a control function. Also the total cost of treatment by this kind of drugs has been minimized. The numerical results are obtained by a numerical method in discretization issue, called AVK.

关键词： HIV/AIDS Mathematical Modeling System Identification Control Theory Immunotherapy

The Bezier Control Points Method for Solving Delay Differential Equation

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Intelligent Control and Automation 2012年第2期3卷 188-196页

作者： Fateme Ghomanjani mohammad hadi Farahi Department of Applied Mathematics Ferdowsi University of Mashhad Mashhad Iran

In this paper, Bezier surface form is used to find the approximate solution of delay differential equations (DDE’s). By using a recurrence relation and the traditional least square minimization method, the best control points of residual function can be found where those control points determine the approximate solution of DDE. Some examples are given to show efficiency of the proposed method.

关键词： Bezier Control Points Delay Differential Equation Residual Function Boundary Value Problem Proportional Delays

Can Campylobacter jejuni play a role in development of celiac disease? A hypothesis

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World Journal of Gastroenterology 2007年第35期13卷 4784-4785页

作者： Behnam Sabayan Farzaneh Foroughinia mohammad hadi Imanieh Student Research Center of Shiraz University of Medical Sciences ShirazIran Gastrohepatology Research Center Department of PediatricsShiraz University of Medical SciencesShirazIran

乳糜泻(CD ) 是有到谷物谷物蛋白质(面筋) 的变态反应在引起小肠粘膜损害的 malabsortive 状况的 entropathy。CD 是基因、环境的因素在贡献疾病开发的多因素的混乱。机制被描述了解释 CD 的病理。为多重面筋肽特定的 T 房间被发现在几... 详细信息

乳糜泻(CD ) 是有到谷物谷物蛋白质(面筋) 的变态反应在引起小肠粘膜损害的 malabsortive 状况的 entropathy。CD 是基因、环境的因素在贡献疾病开发的多因素的混乱。机制被描述了解释 CD 的病理。为多重面筋肽特定的 T 房间被发现在几乎所有病人。如此的宽广 T 房间回答的产生可以是为疾病开发的一个前提。CD 与多重额外的肠的演讲被联系，包括神经病学的赤字。最近的研究与内在的 CD 在病人显示出在 anti-ganglioside 抗体和神经病学的混乱之间的重要关联。Gangliosides 是充满神经系统并且在包括胃肠道的另外的纸巾的 glycosphingolipids。什么与面筋敏感在人触发 anti-ganglioside 抗体的版本，不被知道。但是，机制是可能的包含肠的免疫系统反应到摄取的麦胶蛋白质，小麦的一个部件面筋。研究证明与面筋暴露不同的机制可以在抗体形成被含有，并且另外的环境因素可以也存在。另外，考虑基因倾向 dysregulating 粘膜免疫者回答面对某些环境扳机喜欢胃肠的感染的事实可以是为开发长期的肠的发炎包括的强壮的病因学的因素 CD ，假设在腹的病人，而且在 CD 本身的开发不仅在神经病学的复杂并发症的开发在我们在 CD 的那 antiganglioside 抗体形成可以玩的头脑提起了一个角色。作为在有 antigangliosides 的另外的疾病的 Campylobacter jejuni 的存在，抗体形成被建立了，我们由对两 lipo-polysacharide 普通的象gangliosides一样 epitopes 的分子的模仿 Campylobacter jejuni 的某些紧张覆盖的机制与另外的基因、环境的因素联合在 CD 的开发建议 Campylobacter jejuni 的可能的角色，在胃肠的粘膜的房间结构的 gangliosides 可以引起自体免疫的回答并且因而带到粘膜的萎缩和退化可能由 apoptosis 。

关键词：乳糜泻神经节苷脂分子模拟病例分析

Numerical Solution of a Class of Nonlinear Optimal Control Problems Using Linearization and Discretization

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Applied Mathematics 2011年第5期2卷 646-652页

作者： mohammad hadi Noori Skandari Emran Tohidi 不详

In this paper, a new approach using linear combination property of intervals and discretization is proposed to solve a class of nonlinear optimal control problems, containing a nonlinear system and linear functional, in three phases. In the first phase, using linear combination property of intervals, changes nonlinear system to an equivalent linear system, in the second phase, using discretization method, the attained problem is converted to a linear programming problem, and in the third phase, the latter problem will be solved by linear programming methods. In addition, efficiency of our approach is confirmed by some numerical examples.

关键词： Linear and Nonlinear Optimal Control Linear Combination Property of Intervals Linear Programming Discretization Dynamical Control Systems

Post-transplant lymphoproliferative disorder after liver transplantation: Incidence, long-term survival and impact of serum tacrolimus level

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World Journal of Gastroenterology 2017年第7期23卷 1224-1232页

作者： Ahad Eshraghian mohammad hadi Imanieh Seyed Mohsen Dehghani Saman Nikeghbalian Alireza Shamsaeefar Frouzan Barshans Kourosh Kazemi Bita Geramizadeh Seyed Ali Malek-Hosseini Transplant Research Center Shiraz University of Medical Sciences Gastroenterohepatology Research Center Namazi Hospital

AIM To investigate incidence and survival of post-transplant lymphoproliferative disorder(PTLD) patients after liver transplantation. METHODS A cross-sectional survey was conducted among patients who underwent liver transplantation at Shiraz Transplant Center(Shiraz, Iran) between August 2004 and March 2015. Clinical and laboratory data of patients were collected using a data gathering form. RESULTS There were 40 cases of PTLD in the pediatric age group and 13 cases in the adult group. The incidence of PTLD was 6.25% in pediatric patients and 1.18% in adult liver transplant recipients. The post-PTLD survival of patients at 6 mo was 75.1% ± 6%, at 1 year was 68.9% ± 6.5% and at 5 years was 39.2% ± 14.2%. Higher serum tacrolimus level was associated with lower post-PTLD survival in pediatric patients(OR = 1.07, 95%CI: 1.006-1.15, P = 0.032). A serum tacrolimus level over 11.1 ng/mL was predictive of post PTLD survival(sensitivity = 90%, specificity = 52%, area under the curve = 0.738, P = 0.035). CONCLUSION Incidence of PTLD in our liver transplant patients is comparable to other centers. Transplant physicians may consider adjustment of tacrolimus dose to maintain its serum level below this cutoff point.

关键词： transplant 以后 lymphoproliferative 混乱肝移植幸存 Tacrolimus Epstein-Barr 病毒