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Open Journal of Geology 2016年第8期6卷 703-720页

作者： pedram Attarzadeh Mohammad Yazdi Mehrdad Karimi Kamal Noori Khankahdani Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Faculty of Earth Sciences Shahid Beheshti University Tehran Iran Department of Geology Shiraz Branch Islamic Azad University Shiraz Iran

Dowlat Abad-Tang e Hana area is a part of Neyriz ophiolite zone, parallel to the Zagros thrust, SW of Iran. It is also a part of obduction thrusting belt over the edge of the Arabian continent during the late Cretaceous. Petrographic investigation indicates the main host rocks are harzburgite, dunite, pyroxenite, basalt, gabbro and pelagic marine sediments. The main magma type of this ophiolite complex is sub-alkaline. The geochemical data of analysed samples show depletion of Na and K, and enrichment in Ca. Copper mineralization in Dowlat Abad-Tang e Hana is hosted mainly in peridotite rocks. The mineralizations are vein type and are associated as copper carbonate (malachite and less azurite). The average of Cu grade is 2.3 wt%. The geochemical and mineralogical data show that the primary source of copper is ortho-magmatic (from ultra-basic rocks and ferro magnesium minerals), which later influenced by hydrothermal processes.

关键词： Ophiolite Copper Mineralization Tang-e-Hana Neyriz SW of Iran

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采用交流能源的低功耗DCVSL电路研究

中国科学（E辑） 2002年第2期32卷 198-206页

作者：吴训威杭国强 M.pedram 宁波大学电路与系统研究所宁波315211 浙江大学信息与电子工程学系杭州310027 Departmentof Electrical and Engineering University of Southern California

从改变CMOS电路中能量转换模式的观点出发,研究利用渐变功率时钟的低功耗CMOS电路设计.首先讨论钟控功率信号的代数表示及有关性质,然后归纳采用直流能源的互补CMOS逻辑门转化为采用交流能源的钟控CMOS门电路的设计过程.在此基础上进一... 详细信息

从改变CMOS电路中能量转换模式的观点出发,研究利用渐变功率时钟的低功耗CMOS电路设计.首先讨论钟控功率信号的代数表示及有关性质,然后归纳采用直流能源的互补CMOS逻辑门转化为采用交流能源的钟控CMOS门电路的设计过程.在此基础上进一步提出采用交流能源的DCVSL电路设计.采用正弦功率时钟的PSPICE模拟证实了钟控DCVSL电路具有正确的逻辑功能及低功耗工作的特点.最后提出了一种将钟控信号转换为标准CMOS逻辑电平的接口电路并用计算机模拟验证了它的有效性.

关键词： VLSI设计低功耗技术交流能源钟控DCVSL电路 CMOS电路差动级联电压开关逻辑电路能量转换数字电路

EEG/ERP evidence of possible hyperexcitability in older adults with elevated beta-amyloid

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Translational Neurodegeneration 2022年第1期11卷 835-844页

作者： Hannes Devos Kathleen Gustafson Ke Liao pedram Ahmadnezhad Bradley Estes Laura E.Martin Jonathan D.Mahnken William M.Brooks Jeffrey M.Burns Department of Physical Therapy Rehabilitation Scienceand Athletic TrainingUniversity of Kansas Medical CenterKansas CityKS 66160USA Department of Neurology University of Kansas Medical CenterKansas CityKS 66160USA Hoglund Biomedical Imaging Center University of Kansas Medical CenterKansas CityKS 66160USA Department of Population Health University of Kansas Medical CenterKansas CityKS 66160USA Department of Biostatistics and Data Science University of Kansas Medical CenterKansas CityKS 66160USA University of Kansas Alzheimer’s Disease Center University of Kansas Medical CenterKansas CityKS 66160USA.

Background: Although growing evidence links beta-amyloid (Aβ) and neuronal hyperexcitability in preclinical mouse models of Alzheimer’s disease (AD), a similar association in humans is yet to be established. The first aim of the study was to determine the association between elevated Aβ (Aβ+) and cognitive processes measured by the P3 event-related potential (ERP) in cognitively normal (CN) older adults. The second aim was to compare the event- related power between CNAβ+ and CNAβ−. Methods: Seventeen CNAβ+ participants (age: 73 ± 5, 11 females, Montreal Cognitive Assessment [MoCA] score 26 ± 2) and 17 CNAβ- participants group-matched for age, sex, and MOCA completed a working memory task (n-back with n = 0, 1, 2) test while wearing a 256-channel electro-encephalography net. P3 peak amplitude and latency of the target, nontarget and task difference effect (nontarget−target), and event-related power in the delta, theta, alpha, and beta bands, extracted from Fz, Cz, and Pz, were compared between groups using linear mixed models. P3 ampli-tude of the task difference effect at Fz and event-related power in the delta band were considered main outcomes. Correlations of mean Aβ standard uptake value ratios (SUVR) using positron emission tomography with P3 amplitude and latency of the task difference effect were analyzed using Pearson Correlation Coefficient r. Results: The P3 peak amplitude of the task difference effect at Fz was lower in the CNAβ+ group (P = 0.048). Simi-larly, power was lower in the delta band for nontargets at Fz in the CNAβ+ participants (P = 0.04). The CNAβ+ partici-pants also demonstrated higher theta and alpha power in channels at Cz and Pz, but no changes in P3 ERP. Strong correlations were found between the mean Aβ SUVR and the latency of the 1-back (r = − 0.69;P = 0.003) and 2-back (r = − 0.69;P = 0.004) of the task difference effect at channel Fz in the CNAβ+ group. Conclusions: Our data suggest that the elevated amyloid in cognitively normal ol

关键词： Event-related potentials Electro-encephalography Working memory Older adults Preclinical Beta-amyloid

System Vulnerability Analysis Using Graph Pathfinding Strategies in Partitioned Networks

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Journal of Power and Energy Engineering 2017年第4期5卷 15-24页

作者： Milad Ghiasi Rad pedram Gharghabi Mohiyeddin Rahmani Bamdad Falahati Computer Science and Engineering Department University of Nebraska-Lincoln Lincoln United States Department of Computer and Electrical Engineering Mississippi State University Mississippi United States Department of Electrical Engineering Amirkabir University of Technology Tehran Iran Engineering Services Schweitzer Engineering Laboratories Inc. Pullman WA United States

In this paper, a new method has been introduced to find the most vulnerable lines in the system dynamically in an interconnected power system to help with the security and load flow analysis in these networks. Using the localization of power networks, the power grid can be divided into several divisions of sub-networks in which, the connection of the elements is stronger than the elements outside of that division. By using our proposed method, the probable important lines in the network can be identified to do the placement of the protection apparatus and planning for the extra extensions in the system. In this paper, we have studied the pathfinding strategies in most vulnerable line detection in a partitioned network. The method has been tested on IEEE39-bus system which is partitioned using hierarchical spectral clustering to show the feasibility of the proposed method.

关键词： Power Systems Network Graph Partitioning Path Finding Vulnerability Analysis

使用OculusKeratograph 5M测量圆锥角膜患者NITBUT和TMH（英文）

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国际眼科杂志 2017年第9期17卷 1625-1630页

作者： Masoud Safarzadeh Parvin Azizzadeh pedram Akbarshahi Laleh Heidari 伊朗医科大学康复科学系眼科伊朗德黑兰*** 德黑兰医科大学医学系眼科伊朗德黑兰*** Shahid Beheshti医科大学康复科学系视光学科伊朗德黑兰*** Shahid Beheshti医科大学医学系医学遗传学科伊朗德黑兰***

目的:比较圆锥角膜患者和正常人使用Oculus Keratograph 5M(K5M)测得的非侵入性泪膜破裂时间(NITBUT)和泪河高度(TMH),以确定这两项指标和圆锥角膜的关系。方法:50例100眼圆锥角膜患者和50例100眼正常人参加了这项研究。圆锥角膜组患者... 详细信息

目的:比较圆锥角膜患者和正常人使用Oculus Keratograph 5M(K5M)测得的非侵入性泪膜破裂时间(NITBUT)和泪河高度(TMH),以确定这两项指标和圆锥角膜的关系。方法:50例100眼圆锥角膜患者和50例100眼正常人参加了这项研究。圆锥角膜组患者的年龄为15~60(平均28.33±8.60)y。对照组为18~60(平均26.25±1.11)岁。使用K5M测量所有受试者的NITBUT和TMH。结果:两组之间的NITBUT和TMH平均值差异无统计学意义(P=0.58,0.69)。两参数的相关性研究显示,两组中NITBUT和TMH之间均无相关性(圆锥角膜组:r=0.053,P=0.721;对照组:r=-0.0501,P=0.7098)。

关键词：圆锥角膜非侵入性泪膜破裂时间泪河高度 Oculus Keratography 5M

Geochemistry of Chromitites in Eastern Part of Neyriz Ophiolite Complex (Southern Iran)

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Open Journal of Geology 2017年第3期7卷 213-233页

作者： pedram Attarzadeh Mehrdad Karimi Mohammad Yazdi Kamal Nouri Khankahdani Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Shiraz Branch Islamic Azad University Shiraz Iran Department of Geology Faculty of Earth Sciences Shahid Beheshti University Tehran Iran

The Neyriz ophiolite complex is a part of NW-SE thrust belt (Late Cretaceous) of Iran, which is over the Arabian plate margin. The complex is mainly composed of the upper mantle rocks. Our research was focused on the eastern part of Neyriz ophiolite complex so called as “Dowlat Abad-Tang e Hana”. Mantle sequence of this ophiolitic complex is comprising predominantly of harzburgite and minor lherzolite, dunitc sheaths and chromite pods. Harzburgite is the most abundant ultramafic rock and is associated with the less dunite masses. The chromites are known with Cr# 42 to 76 and Mg# 73 to 89. There is a negative correlation between Cr#-Mg# which is one of the features of podiform chromites. The geochemistry of these chromites is consistent with the overall composition of podiform chromites in terms of Cr#, Mg#, the amounts of Cr2O3 (13.35% - 54.47%), Al2O3 (0.43% - 8%), MgO (13.25% - 38.56%), TiO2 (0.003% - 0.206%) as well as the correlations between various oxides and all of them are high chromium types.

关键词： Ophiolite Podiform Chromite Neyriz Iran

SEDSR: Soft Error Detection Using Software Redundancy

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Journal of Software Engineering and Applications 2012年第9期5卷 664-670页

作者： Seyyed Amir Asghari Atena Abdi Hassan Taheri Hossein pedram Saadat Pourmozaffari Computer Engineering and Information Technology Department Amirkabir University of Technology Tehran Iran Electrical Engineering Department Amirkabir University of Technology Tehran Iran

This paper presents a new method for soft error detection using software redundancy (SEDSR) that is able to detect transient faults. Soft errors damage the control flow and data of programs and designers usually use hardware-based solutions to handle them. Software-based techniques for soft error detection force less cost and delay to systems and do not change their configuration. Therefore, these kinds of methods are appropriate alternatives for hardware-based techniques. SEDSR has two separate parts for data and control flow errors detection. Fault injection method is used to compare SEDSR with previous methods of this field based on the new parameter of “Evaluation Factor” that takes in account fault coverage, memory and performance overheads. These parameters are important in real time safety critical applications. Experimental results on SPEC2000 and some traditional benchmarks of this field show that SEDSR is much better than previous methods of this field. SEDSR’s evaluation factor is about 50% better than other methods of this field. These results show its success in satisfaction of the existing tradeoff between fault coverage, performance and memory overheads.

关键词： Soft Error Detection Control Flow Errors Data Errors Evaluation Factor Fault Injection

Exploring DFT+U parameter space with a Bayesian calibration assisted by Markov chain Monte Carlo sampling

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npj Computational Materials 2021年第1期7卷 1661-1669页

作者： pedram Tavadze Reese Boucher Guillermo Avendaño-Franco Keenan X.Kocan Sobhit Singh Viviana Dovale-Farelo Wilfredo Ibarra-Hernández Matthew B.Johnson David S.Mebane Aldo H.Romero Department of Physics and Astronomy West Virginia UniversityMorgantownWVUSA Department of Mechanical and Aerospace Engineering West Virginia UniversityMorgantownWVUSA Department of Physics and Astronomy Rutgers UniversityPiscatawayNJUSA Facultad de Ingeniería Benemérita Universidad Autónoma de PueblaApdo.Postal J-39PueblaPue.72570México

The density-functional theory is widely used to predict the physical properties of ***,it usually fails for strongly correlated materials.A popular solution is to use the Hubbard correction to treat strongly correlated electronic ***,the values of the Hubbard U and J parameters are initially unknown,and they can vary from one material to *** this semi-empirical study,we explore the U and J parameter space of a group of iron-based compounds to simultaneously improve the prediction of physical properties(volume,magnetic moment,and bandgap).We used a Bayesian calibration assisted by Markov chain Monte Carlo sampling for three different exchange-correlation functionals(LDA,PBE,and PBEsol).We found that LDA requires the largest U *** has the smallest standard deviation and its U and J parameters are the most transferable to other iron-based ***,PBE predicts lattice parameters reasonably well without the Hubbard correction.

关键词： materials Hubbard parameter

Effects of Subcutaneous Fat Stores on Serum Phospholipids and Nonesterified Fatty Acid Lipid Fractions in Periparturient Dairy Cows

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Journal of Agricultural Science and Technology(B) 2014年第5期4卷 352-359页

作者： Cynthia Madeleine Scholte pedram Rezamand Shannon Louise Shields Kirk Christen Ramsey Department of Animal and Veterinary Science University of Idaho Moscow 83843 Idaho USA

Negative energy balance in early lactating dairy cows results in a massive release of fatty acids （FA） into the blood in nonesterified fatty acids （NEFA） form. Large quantities of circulating NEFA may alter the serum FA profile of phospholipids （PL） fraction, which is responsible for cellular plasma membrane integrity and intercellular signaling. The objective of this study was to determine the effects of subcutaneous fat stores, as assessed by body condition score （BCS） on a scale of one to five, around the time of calving and the subsequent lipomobilization on FA profile of serum NEFA and PL lipid fractions, and on productive performance. Based on BCS, cows were retrospectively dichotomized into two groups： over-conditioned （BCS _〉 3.25） and control （BCS _〈 3.0）. 22 cows had serum samples obtained at -28, -7, 8, 18 and 28 d relative to parturition and analyzed for the FA profile of the NEFA and PL fractions. As expected, over-conditioned cows had greater total plasma NEFA concentrations and decreased dry matter intake. Milk yield and composition did not differ between groups. More importantly however, several FA in the NEFA fraction of plasma lipids varied significantly, including C14：1, C16：0, C18：0 and C20：3n3. In the PL fraction, other FA varied significantly by BCS around time of parturition, including C16：0, C17：0, total C18：2 cis, and C20：2. In summary, BCS did affect FA profile of serum NEFA and PL lipid fractions. This may have drastic consequences for circulating immune cells and their ability to fight infection by altering their FA profile.

关键词： Lipid mobilization phospholipid nonesterified fatty acid dairy cow.

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