排序方式: 共有49条查询结果,搜索用时 15 毫秒
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Mohammadi-Asl Saeed Nourinia Javad Ghobadi Changiz Majidzadeh Maryam Mostafapour Ehsan Haghshenas Alireza 《Wireless Personal Communications》2017,97(2):2131-2144
Wireless Personal Communications - A novel design of double-layer dual-band circularly polarized array antennas (DDCPAAs) is presented in this paper. First, a DDCP single antenna is introduced as... 相似文献
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Fatemeh Vahedi Mojtaba Sankian Malihe Moghadam Maryam Mohaddesfar Sirous Ghobadi Abdol Reza Varasteh 《Applied biochemistry and biotechnology》2011,163(7):895-905
Chenopodium album is a weedy annual plant in the genus Chenopodium. C. album pollen represents a predominant allergen source in Iran. The main C. album pollen allergens have been described as Che a 1, Che a 2, and Che a 3. The aim of this work was to clone the Che a 1 in Escherichia coli to establish a system for overproduction of the recombinant Che a 1 (rChe a 1). In order to clone this allergen, the pollens
were subjected to RNA extraction. A full-length fragment encoding Che a 1 was prepared by polymerase chain reaction amplification
of the first-strand cDNA synthesized from extracted RNA. Cloning was carried out by inserting the cDNA into the pET21b (+)
vector, thereafter the construct was transformed into E. coli Top10 cells and expression of the protein was induced by IPTG. The rChe a 1 was purified using histidine tag in recombinant
protein by means of Ni–NTA affinity chromatography. IgE immunoblotting, ELISA, and inhibition ELISA were done to evaluate
IgE binding of the purified protein. In conclusion, the cDNA for the major allergen of the C. album pollen, Che a 1, was successfully cloned and rChe a 1 was purified. Inhibition assays demonstrated allergic subjects sera
reacted with rChe a 1 similar to natural Che a 1 in crude extract of C. album pollen. This study is the first report of using the E. coli as a prokaryotic system for Che a 1 cloning and production of rChe a 1. 相似文献
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In this work the device characteristic of bilayer graphene MOSFET is investigated by calculation of transmission coefficient using tight-binding method. The real shape of applied potential on the bilayer graphene was included in the tight binding calculation. As obtained transmission coefficient is used to explore the current–voltage characteristics of the device in both on and off regimes. Electrical behavior of the device was obtained for different gate and drains voltages and channel length. 相似文献
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V. Sathi Ch. Ghobadi J. Nourinia 《Journal of Infrared, Millimeter and Terahertz Waves》2008,29(10):897-905
Circular ring microstrip antennas have several interesting properties that make it attractive in wireless applications. Although several analysis techniques such as cavity model, generalized transmission line model, Fourier-Hankel transform domain and the method of matched asymptotic expansion have been studied by researchers, there is no efficient design tool that has been incorporated with a suitable optimization algorithm. In this paper, the cavity model analysis along with the genetic optimization algorithm is presented for the design of circular ring microstrip antennas. The method studied here is based on the well-known cavity model and the optimization of the dimensions and feed point location of the circular ring antenna is performed via the genetic optimization algorithm, to achieve an acceptable antenna operation around a desired resonance frequency. The antennas designed by this efficient design procedure were realized experimentally, and the results are compared. In addition, these results are also compared to the results obtained by the commercial electromagnetic simulation tool, the FEM based software, HFSS by ANSOFT. 相似文献
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V. Sathi Ch. Ghobadi J. Nourinia 《International Journal of Infrared and Millimeter Waves》2008,29(10):897-905
Circular ring microstrip antennas have several interesting properties that make it attractive in wireless applications. Although
several analysis techniques such as cavity model, generalized transmission line model, Fourier-Hankel transform domain and
the method of matched asymptotic expansion have been studied by researchers, there is no efficient design tool that has been
incorporated with a suitable optimization algorithm. In this paper, the cavity model analysis along with the genetic optimization
algorithm is presented for the design of circular ring microstrip antennas. The method studied here is based on the well-known
cavity model and the optimization of the dimensions and feed point location of the circular ring antenna is performed via
the genetic optimization algorithm, to achieve an acceptable antenna operation around a desired resonance frequency. The antennas
designed by this efficient design procedure were realized experimentally, and the results are compared. In addition, these
results are also compared to the results obtained by the commercial electromagnetic simulation tool, the FEM based software,
HFSS by ANSOFT. 相似文献
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Kimia Ghobadi Taewoo Lee Houra Mahmoudzadeh Daria Terekhov 《Operations Research Letters》2018,46(3):339-344
Given an observation of a decision-maker’s uncertain behavior, we develop a robust inverse optimization model for imputing an objective function that is robust against mis-specifications of the behavior. We characterize the inversely optimized cost vectors for uncertainty sets that may or may not intersect the feasible region, and propose tractable solution methods for special cases. We demonstrate the proposed model in the context of diet recommendation. 相似文献
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Ghobadi Nader Hafezi Fatemeh Naderi Sirvan Amiri Fatemeh Luna Carlos Arman Ali Shakoury Reza Ţălu Ştefan Rezaee Sahar Habibi Maryam Mardani Mohsen 《Semiconductors》2019,53(13):1751-1758
Semiconductors - The purpose of this research is to explore the properties of CoSe nanostructured thin films on glass substrates prepared by a chemical solution deposition method. Special attention... 相似文献
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The interaction of a new derivative of thiazole orange (TO-3) with calf thymus DNA (ctDNA) has been investigated by fluorescence
and absorption spectroscopy. When TO-3 binds to ctDNA, absorption bands exhibit significant hypochromicity at low base pair/dye
ratio (BP/D ratio), and high BP/D show hyperchromicity with red shift. The spectral changes are attributed to the different
species formed between TO-3 and ctDNA in the titration course of the dye molecule with DNA. Multivariate curve resolutions–alternating
least squares (MCR–ALS) is applied to the absorption measurements recorded to recover the concentration profiles and the pure
spectra of the DNA/TO-3 complexes involved in the process. The binding constant and size of the binding site have been determined
spectrophotometrically using the McGhee von Hippel equation. MCR–ALS has been used to reveal the precise concentration profiles
of all detectable species formed between ctDNA and TO-3 and their pure spectral profiles. 相似文献