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Cellular Automata in Topology Optimization of Continuum Structures
E Sanaei, M Babaei
International Journal of Engineering, Science and Technology , 2011,
Abstract: In this paper, an optimization algorithm based on cellular automata (CA) is developed for topology optimization of continuum structures with shear and flexural behavior. The design domain is divided into small triangle elements and each cell is considered as a finite element. The stress analysis is performed by the Constant Strain Triangles (CST) finite elements method. The thicknesses of the individual cells are taken as the design variables, while the weight of the structure and the ratio of the Von Mises equivalent stress to the yield stress in each cell are considered as the two objective functions to minimize. Using the weighted sum method, the multi-objective optimization problem (MOOP) is converted to the single-objective optimization problem (SOOP) and then the optimization problem is solved by the developed method. The paper reports the results of several design experiments, comparing with the existing reported results.
Computer-Aided Vaccine Design: A Brief Report
R Ghasemi Khorasgani,M Sanaei,M Mohammad Beigi
Tehran University Medical Journal , 2012,
Abstract: Background: Although the conventional vaccines have been instrumented in the incidence of many infectious diseases, the advances in genetic engineering and bioinformatics have provided the opportunity for developing improved and new vaccines.Methods: Reverse vaccinology was pioneered by a group of researchers investigating development of a vaccine against serogroup B Neisseria meningitidis. Reverse vaccinology analyzes the entire genome of a pathogen with the aid of computational programs to identify potentially antigenic extracellular proteins.Results: Using this method for Neisseria meningitidis genome analysis, 600 secretory or surface-exposed proteins were identified and, subsequently, 350 proteins were expressed and purified. Finally, seven proteins capable of activating the immune system against a range of strains were identified.Conclusion: Improved computational techniques are now able to provide researchers with high-confidence predictions for complex biological characteristics. This will herald a move to computer-aided biotechnology in which time-consuming and expensive large-scale experimental approaches are progressively replaced by functional bioinformatic investigations.
Effect of different levels of nickel in nutrient solution containing NH4NO3 on lipid peroxidation and activity of some antioxidant enzymes in cucumber leaves
H. Bahmanziari,A.H. Khoshgoftarmanesh,A. Sanaei Ostovar,M. Shirvani
Journal of Science and Technology of Greenhouse Culture , 2013,
Abstract: Nickel (Ni) is necessary for plants at low concentrations; but excess Ni has toxic effects on plant growth. In this research, the effects of different Ni levels (0, 50, 100 and 200 μM from NiCl2) on leaf antioxidative response of two cucumber cultivars (Cucumis sativus L. cvs. Super Dominus and Negin) supplied with NH4NO3 as nitrogen source in nutrient solution was investigated. The results showed that by increasing Ni concentration in the nutrient solution and growth period, Ni concentration in the leaves of both cucumber cultivars was increased. This increase was greater at the vegetative growth stage compared with the reproductive stage. Higher levels of malonedialhdeyde (MDA) were also produced at the vegetative stage with respect to the reproductive stage. Application of 50 μM Ni significantly reduced MDA concentration, produced from lipid peroxidation, in comparison with the Ni-free control treatment. The effect of Ni on catalase (CAT) activity was dependent on the cucumber cultivar and concentration of this element in the growth medium. At the vegetative stage, Ni addition had no significant effect on activity of CAT in Super Dominus cultivar, while significantly reduced leaf activity of CAT in Negin cultivar. At the reproductive stage, Ni addition reduced activity of CAT in comparison with Ni-free treatment, regardless of the cucumber cultivar. Results showed that at the vegetative stage, application of 50 μM Ni to the growth medium resulted in lower activity of guaiacol peroxidase (GPX) in the leaves of both cucumber cultivars. By increasing the Ni level to 100 and 200 μM, the activity of this enzyme was increased. At the reproductive stage, activity of the ascorbate peroxidase (APX) in the leaves was dependent on the cultivar and concentration of this element in the medium. According to the results obtained from the present study, in general, the effect of Ni on activity of antioxidant enzymes in cucumber leaves varies with plant cultivar, Ni level and enzyme type.
Some Quality Attributesand Nutritional Status of Greenhouse Cucumber in Qom Province
A. Sanaei Ostovar,A.H. Khoshgoftarmanesh,M.H. Mirzapour
Journal of Science and Technology of Agriculture and Natural Resources , 2011,
Abstract: This study was conducted to investigate nutritional status and some quality aspects of greenhouse cucumber in Qom province. After selecting 20 greenhouses, concentrations of macro- and micronutrients as well as lead (Pb) and cadmium (Cd) in soil and plant were measured. In addition, some fruit quality attributes were determined. Phosphorus (P) and potassium (K) concentrations in soils were much higher than their critical levels. The mean concentrations of soil DTPA-extractable iron (Fe), copper (Cu), and manganese (Mn) were 12.0, 1.98, and 14.5, respectively. The mean concentration of calcium (Ca) in cucumber leaf was high while in fruit was lower compared to its sufficiency level. Most fruit samples were deficient in K, Fe, Zn, Cu, and Mn. The mean nitrate (336 mg kg-1) and Pb (0.34 mg kg-1) concentrations in cucumber fruits were higher than their acceptable levels. Ascorbic acid concentration of fruits showed positive correlation with Fe concentration. Also, fruit Mg concentration had a positive correlation with the total dissolved solids and negative correlation with fruit moisture content. The results indicated that improper nutrition management in Qom cucumber greenhouses has caused micronutrients deficiencies and high nitrate and Pb concentration, which are important to consumers' health.
Comment on “Glasgow Coma Scale and Its Components on Admission: Are They Valuable Prognostic Tools in Acute Mixed Drug Poisoning?”
Hossein Sanaei-Zadeh
Critical Care Research and Practice , 2011, DOI: 10.1155/2011/159182
Abstract:
LDPC Code Design for Nonuniform Power-Line Channels
Ali Sanaei,Masoud Ardakani
EURASIP Journal on Advances in Signal Processing , 2007, DOI: 10.1155/2007/76146
Abstract: We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater than the number of code parameters in conventional channel. Therefore, search-based optimization methods are impractical. We first formulate the problem of optimizing the rate of an irregular low-density parity-check code, with guaranteed convergence over a general nonuniform channel, as an iterative linear programming which is significantly more efficient than search-based methods. Then we use this technique for a typical power-line channel. The methodology of this paper is directly applicable to all decoding algorithms for which a density evolution analysis is possible.
LDPC Code Design for Nonuniform Power-Line Channels
Sanaei Ali,Ardakani Masoud
EURASIP Journal on Advances in Signal Processing , 2007,
Abstract: We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater than the number of code parameters in conventional channel. Therefore, search-based optimization methods are impractical. We first formulate the problem of optimizing the rate of an irregular low-density parity-check code, with guaranteed convergence over a general nonuniform channel, as an iterative linear programming which is significantly more efficient than search-based methods. Then we use this technique for a typical power-line channel. The methodology of this paper is directly applicable to all decoding algorithms for which a density evolution analysis is possible.
Comment on “Glasgow Coma Scale and Its Components on Admission: Are They Valuable Prognostic Tools in Acute Mixed Drug Poisoning?”
Hossein Sanaei-Zadeh
Critical Care Research and Practice , 2011, DOI: 10.1155/2011/159182
Abstract:
Hyperhomocysteinemia in HIV-Infected Individuals: Correlation of a Frequent Prothrombotic Factor with CD4+ Cell Count
Alireza Abdollahi,Tahereh Sanaei Shoar
Oman Medical Journal , 2012,
Abstract: Objective: This study was aimed at providing an analysis of the correlation between CD4/CD8 counts and some coagulation factors in HIV-Positive Iranian patients.Methods: A case-control study on 58 HIV-infected patients and control group (58 healthy individuals). Patients and controls were matched for sex and age. In this study, several blood parameters were measured in 58 HIV-infected patients and the controls. Laboratory data were then measured including hemoglobin, platelets, homocysteine, serum levels of IgM and IgG antiphospholipid antibodies (aPL), IgM and IgG anticardiolipin antibotdies (aCL), and CD4+ and CD8+ cell count.Results: The HIV-infected patients, compared to healthy controls, showed a significant decline in platelets, CD4 count and CD8 count (p<0.0001), and an increase of homocysteine (p<0.0001) and IgG aPL levels (p<0.0001). No statistical difference was found between patients with CD4 count £200 and CD4 count >200 in the evaluated variables.Conclusion: The results showed that thrombophilic abnormality in the form of hyperhomocysteinemia is more frequent in HIV-infected patients and should be considered by clinicians in view of an early diagnosis of the hypercoagulability state to prevent thrombotic complications.
Effect of Treated Polymeric Industrial by-Products Zinc Availability on Corn Characteristics in a Calcareous Soil
A.H Khoshgoftarmanesh,A Sanaei Ostovar
Journal of Science and Technology of Agriculture and Natural Resources , 2010,
Abstract: The objective of this study was to evaluate the possibility of using treated industrial by-products as a zinc (Zn) source and compare their Zn availability and efficiency to ZnSO4. A greenhouse factorial experiment in a completely randomized block design was conducted with corn (Zea mays L.) in triplicates. Treatments included three Zn sources (ZnSO4, IUT-UT in size of < 1 mm and IUT-UT in size of 2-3 mm) at three rates (0, 20 and 40 kg ha-1). The results showed that Zn application both in the form of ZnSO4 and treated industrial by-products significantly (P < 0.05) increased the growth and shoot dry matter yield of corn. Shoot dry matter weight of corn in pots that had received IUTUT was higher compared to those that had received ZnSO4. The highest shoot dry matter weight was produced at the IUT-UT treatment in size of < 1 mm. Increased fertilizer rate significantly (P < 0.05) enhanced shoot and root Zn concentration. However, this increase was higher in ZnSO4 treatment as compared to the IUT-UT treatments. Application of the IUT-UT caused a significant increase in shoot Fe concentration of corn. Shoot and root Cd concentration in all experimental treatments was less than 0.02 mg kg-1. The results showed that IUT-UT can be used as a slow-release Zn fertilizer with low impurity.
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