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Efficient and optimized approximate GDI full adders based on dynamic threshold CNTFETs for specific least significant bits

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Frontiers of Information Technology & Electronic Engineering 2023年第4期24卷 599-616页

作者： Ayoub SADEGHI Razieh GHASEMI hossein ghasemian Nabiollah SHIRI Department of Electrical Engineering Shiraz BranchIslamic Azad UniversityShiraz ***Iran School of Electrical Engineering Iran University of Science and TechnologyTehran ***Iran Department ofElectrical and Electronic Engineering Shiraz University of TechnologyShiraz ***Iran

Carbon nanotube field-effect transistors(CNTFETs) are reliable alternatives for conventional transistors, especially for use in approximate computing(AC) based error-resilient digital circuits. In this paper, CNTFET technology and the gate diffusion input(GDI) technique are merged, and three new AC-based full adders(FAs) are presented with 6, 6, and 8 transistors, separately. The nondominated sorting based genetic algorithm II(NSGA-II) is used to attain the optimal performance of the proposed cells by considering the number of tubes and chirality vectors as its variables. The results confirm the circuits' improvement by about 50% in terms of power-delay-product(PDP) at the cost of area occupation. The Monte Carlo method(MCM) and 32-nm CNTFET technology are used to evaluate the lithographic variations and the stability of the proposed circuits during the fabrication process, in which the higher stability of the proposed circuits compared to those in the literature is observed. The dynamic threshold(DT) technique in the transistors of the proposed circuits amends the possible voltage drop at the outputs. Circuitry performance and error metrics of the proposed circuits nominate them for the least significant bit(LSB) parts of more complex arithmetic circuits such as multipliers.

关键词： Carbon nanotube field-effect transistor(CNTFET) Optimization algorithm Nondominated sorting based genetic algorithm II(NSGA-II) Gate diffusion input(GDI) Approximate computing

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Preparation of transparent nanostructured N-doped TiO_2 thin films by combination of sonochemical and CVD methods with visible light photocatalytic activity

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Journal of Advanced Ceramics 2018年第3期7卷 185-196页

作者： hossein RASOULNEZHAD Ghader hosseinZADEH Reza hosseinZADEH Naser ghasemian Department of Electrical & Electronics Engineering Standard Research Institute (SRI) Department of Chemical Engineering University of Bonab Medical Laser Research Group Medical Laser Research Center

Pollution of water resources with pesticide compounds has raised serious environmental problems,and for photocatalytic degradation of these pollutants,thin film photocatalysts are preferred to colloidal ones due to the separation problem of colloidal *** this work,nanostructured TiO_2 and N-doped TiO_2 thin films with high transparency were deposited on glass and quartz substrates through sonochemical–chemical vapor deposition(CVD)*** films prepared on glass and quartz substrates had nanocubic and nanospherical morphology,*** presence of N atoms in the structure of TiO_2 resulted in a decrease in the band gap energy of TiO_2 and also in the reduction of photogenerated electron–hole recombination ***,the presence of N atoms induced the formation of Ti^(3+)species which can act as hole trapping *** prepared thin films were also used for the visible light photocatalytic degradation of paraoxon *** to these results among the prepared thin films,the N-doped TiO_2 thin films have higher photocatalytic activity than pure TiO_2 thin ***,in comparison with the thin films deposited on quartz substrate,the films on glass substrate have higher photocatalytic performance,which can be related to the special nanocubic morphology of these samples.

关键词： N-doped TiO2 film transparent photocatalyst chemical vapor deposition (CVD) ultrasonic

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Astragalus adscendens extract shows antidiabetic effects through controlling oxidative stress,inflammation and apoptosis in streptozotocin-induced diabetic rats

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Asian Pacific Journal of Tropical Biomedicine 2023年第6期13卷 242-249页

作者： Yosra Raziani Kimia Karami Hamid Reza Mohammadi hossein Mahmoudvand Mohammad Nabi Moradi Javad ghasemian Yadegari Nursing Department Al-Mustaqbal University College51001 HillahBabylonIraq Razi Herbal Medicines Research Center Lorestan University of Medical SciencesKhorramabadIran Molecular and Cellular Laboratory School of Allied MedicineLorestan University of Medical SciencesKhorramabadIran

Objective:To assess the effect of oral treatment of methanolic extract of the aerial parts of Astragalus adscendens in streptozotocin-induced diabetic ***:In order to induce diabetes,rats intraperitoneally received streptozotocin at 65 mg/*** adult male Wistar rats were allocated into six groups(10 rats per each)including the healthy control group,the diabetic group as well as the diabetic group treated with Astragalus adscendens methanolic extract at 50,100,and 200 mg/kg per day or glibenclamide(0.6 mg/kg/day)for 28 *** effects of Astragalus adscendens methanolic extract on the levels of glucose,insulin,alanine aminotransferase,alkaline phosphatase,aspartate aminotransferase,bilirubin,creatinine,urea,uric acid,total protein,albumin,triglyceride,cholesterol,α-amylase,oxidant/antioxidant enzymes,and inflammatory cytokines were *** time-PCR was also used for measuring the gene expression of caspase-3,Bcl2,and ***:The levels of glucose,cholesterol,triglyceride,creatinine,urea,uric acid,alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase,bilirubin,and malondialdehyde considerably declined(P<0.001)in diabetic rats after treatment with Astragalus adscendens methanolic extract especially at a dose of 200 mg/*** addition,treatment with Astragalus adscendens methanolic extract noticeably increased the level of insulin,total protein,and albumin as well as improved the activities of catalase,glutathione peroxidase,and superoxide dismutase,as well as the expression levels of TNF-α,IL-1β,caspase-3,Bcl2 and Bax(P<0.001)compared to the diabetic control *** extract also inhibitedα-amylase in a dose-dependent manner with an IC_(50)value of 19.6μg/***:Astragalus adscendens methanolic extract shows potent antidiabetic,anti-inflammatory,anti-apoptotic,and antioxidant effects in diabetic ***,more studies are needed to verify the underlying mechanism of the effect of this plant extract and test its effica

关键词： Herbal medicines Astragalus adscendens Diabetes Antioxidant Antidiabetes Streptozotocin Antiinflammation

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The Effect of Chlorine Dioxide Charges in Chlorine Dioxide-Alkaline Extraction-Chlorine Dioxide （DED） Sequence on Optical Properties of Kraft Pulp of Eucalyptus camaldulensis

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Journal of Environmental Science and Engineering(A) 2012年第2期1卷 181-186页

作者： hossein Resalati Sara Kajforush Ali ghasemian Ahmadreza Saraeyan Department of Pulp and Paper Sciences and Technology College of Wood and Paper Engineering Gorgan University ofAgricultural Sciences and Natural Resources Gorgan 49138-15739 Iran

Hardwoods are important raw material for making pulp and paper products. Eucalyptus camaldulensis is a fast-growing hardwood species with a wide distribution in Iran and can be introduced as appropriatematerial to compensate the wood shortages of the natural forest. Kraft pulping was performed under different cooking conditions and, based on the relations of pulp yield and kappa number, bleachable kraft pulp at screened yield of 43.3% and kappa number of 31.3 was selected for DED （Chlorine Dioxide-Alkaline Extraction-Chlorine Dioxide） bleaching and its bleachability was studied at different kappa factor in D~ stage. The results indicated that the bleachable kraft pulp from this species has high kappa number at acceptable screened yield and to complete the delignification in the bleaching process, higher kappa factor may be needed in DED bleaching sequence. The main reduction in final kappa number and yield loss were observed at kappa factor level of 0.2 but by further increase in kappa factor up to 0.4, more development were observed in optical properties but at lower opacity.

关键词： Kraft Kappa factor Eucalyptus camaldulensis DED bleaching.

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漂白脱墨浆与自产阔叶木化机浆生产新闻纸

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湖南造纸 2013年第3期 45-47页

作者：宋文 Ali ghasemian hossein Resalati Kenneth L. Pinder 湖南泰格林纸集团股份有限公司湖南岳阳414002

本文的研究范围是对采用当地的旧报纸/旧杂志纸漂白脱墨浆作为化机浆的增强配浆来生产新闻纸进行评估。对当地的旧报纸/旧杂志纸按三种不同的比率进行取样后重新打浆、脱墨和过氧化氢漂白,采用DTPA和EDTA分别作为螯合剂。获得的最好的... 详细信息

本文的研究范围是对采用当地的旧报纸/旧杂志纸漂白脱墨浆作为化机浆的增强配浆来生产新闻纸进行评估。对当地的旧报纸/旧杂志纸按三种不同的比率进行取样后重新打浆、脱墨和过氧化氢漂白,采用DTPA和EDTA分别作为螯合剂。获得的最好的脱墨浆与长纤维(LF)浆和当地的化机浆混合,确定了制备的手抄片的强度和光学性能。结果表明采用EDTA的漂白脱墨浆可以将配比提高到30%,与化机浆和长纤维浆混合,减少长纤维浆的消耗。EDTA的结果更好些,化学性能和机械性能的结果都比DTPA好。EDTA对于强度性能的影响机理有助于防止过氧化氢分解,因此在漂白段可以改良更多的木质素,从而获得更好的强度性能。

关键词：废纸回收 DIP(脱墨浆) 螯合剂漂白纸张性能

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