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充分利用炭黑废热有效降低生产成本

炭黑工业 2004年第6期 14-18页

作者： C．p．natarajan 朱永康

炭黑已经成为典型的无法控制原料或产品价格的行业。炭黑原料(CBFS)大部分是由石油炼制厂生产的，其价格会随着世界原油价格而发生波动。由于炭黑70％左右被用于轮胎制造，其销售价格要受汽车市场变化的影响。这些价格是我们无法控制的... 详细信息

炭黑已经成为典型的无法控制原料或产品价格的行业。炭黑原料(CBFS)大部分是由石油炼制厂生产的，其价格会随着世界原油价格而发生波动。由于炭黑70％左右被用于轮胎制造，其销售价格要受汽车市场变化的影响。这些价格是我们无法控制的。因此，优化生产工艺，提高生产率和产量，创造额外的收益，

关键词：降低生产成本炭黑原油价格汽车市场产品价格行业销售价格原料轮胎制造波动

腰臀比与心血管代谢性状、2型糖尿病和冠心病的遗传关联

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中华预防医学杂志 2017年第7期51卷 603-603页

作者： Emdin CA Khera AV natarajan p 张美仙首都儿科研究所流行病学研究室

既往观察性研究表明，腹型肥胖与2型糖尿病和冠心病密切关联，但这些关联是否反映因果关系仍不明确。本研究采用孟德尔随机化设计，以2型糖尿病和冠心病为主要结局，以调整BMI后的腰臀比为暴露因素，

关键词： 2型糖尿病冠心病腰臀比遗传关联心血管性状代谢腹型肥胖

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妊娠期高血压疾病对远期心血管病的影响

中华高血压杂志 2020年第2期28卷 123-123页

作者：周卫(译) 叶鹏(摘、审校) Honigberg MC Zekavat SM Aragam K Klarin D Bhatt DL Scott NS peloso GM natarajan p 不详

对妇女妊娠期高血压疾病(hypertensive disorder of pregnancy,HDp)史的研究,可能有助于改善动脉粥样硬化性心血管病的风险评估。但是,有HDp既往史的中年无症状妇女在未来患心血管病的风险仍未知。该研究旨在探讨有或无HDp既往史的中年... 详细信息

对妇女妊娠期高血压疾病(hypertensive disorder of pregnancy,HDp)史的研究,可能有助于改善动脉粥样硬化性心血管病的风险评估。但是,有HDp既往史的中年无症状妇女在未来患心血管病的风险仍未知。该研究旨在探讨有或无HDp既往史的中年女性心血管病的远期发病率。纳入标准:在前瞻性、观察性英国生物资料库中,纳入40~69岁并至少有一活产的英国妇女,对其中一亚组妇女进行了无创性动脉硬度测量。

关键词：妊娠期高血压疾病动脉硬度心血管病活产无创性无症状 pregnancy 纳入标准

Design concepts of an aircraft wing： composite and morphing airfoil with auxetic structures

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Frontiers of Structural and Civil Engineering 2016年第4期10卷 394-408页

作者： p R BUDARApU Sudhir Sastry Y B R natarajan Department of Aerospace Engineering Indian Institute of Science Bangalore 560 012 India Department of Aeronautical Engineering College of Engineering Defence University Ethiopia Department of Aeronautical Engineering Institute of Aeronautical Engineering Hyderabad India

This paper is categorized into two parts. （1） A frame work to design the aircraft wing structure and （2） analysis ofa morphing airfoil with auxetic structure. The developed design frame work in the first part is used to arrive at the sizes of the various components of an aircraft wing structure. The strength based design is adopted, where the design loads are extracted from the aerodynamic loads. The aerodynamic loads acting on a wing structure are converted to equivalent distributed loads, which are further converted point loads to arrive at the shear forces, bending and twisting moments along the wing span. Based on the estimated shear forces, bending and twisting moments, the strength based design is employed to estimate the sizes of various sections of a composite wing structure. A three dimensional numerical model of the composite wing structure has been developed and analyzed for the extreme load conditions. Glass fiber reinforced plastic material is used in the numerical analysis. The estimated natural frequencies are observed to be in the acceptable limits. Furthermore, the discussed design principles in the first part are extended to the design of a morphing airfoil with auxetic structure. The advantages of the morphing airfoil with auxetic structure are （i） larger displacement with limited straining of the components and （ii） unique deformation characteristics, which produce a theoretical in-plane poisson＇s ratio of -1. Aluminum Alloy AL6061-T651 is considered in the design of all the structural elements. The compliance characteristics of the airfoil are investigated through a numerical model. The numerical results are observed to be in close agreement with the experimental results in the literature.

关键词： wing design aerodynamic loads morphing airfoil auxetic structures negative poisson's ratio

Design of precise Multiplier Using Inexact Compressor for Digital Signal processing

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Computer Systems Science & Engineering 2022年第8期42卷 619-638页

作者： Nagarajan Shanmugam Vijeyakumar Krishnasamy natarajan Kalaiselvi Sundaram Saravanakumar natarajan Electronics and Communication Engineering Dr.Mahalingam College of Engineering and TechnologyPollachi642003Tamil NaduIndia

In the recent years,error recovery circuits in optimized data path units are adopted with approximate computing *** this paper the novel multipliers have effective utilization in the newly proposed two different 4:2 approximate compressors that generate Error free Sum(ES)and Error free Carry(EC).proposed ES and proposed EC in 4:2 compressors are used for performing partial product(pp)*** structural arrangement utilizes Dadda structure based *** to the regularity of pp arrangement Dadda multiplier is chosen for compressor implementation that favors easy standard cell ASIC *** this,the proposed compression idealogy are more effective in the smallest n columns,and the accurate compressor in the remaining most significant *** limits the error in the multiplier output to be not more than 2n for an n X n *** choice among the proposed compressors is decided based on the significance of the sum and carry signals on the multiplier *** an enhancement to the proposed multiplier,we introduce two Area Efficient(AE)variants viz.,proposed-AE(p-AE),and p-AE with Error Recovery(p-AEER).The proposed basic p-AE,and p-AEER designs exhibit 46.7%,52.9%,and 52.7%pDp reduction respectively when compared to an approximate multiplier of minimal error type and are designed with 90nm ASIC *** proposed design and their performance validation are done by using Cadence *** performance evaluations are carried out using cadence encounter with 90nm ASIC *** proposed-basic p-AEA and p-AEER designs demonstrate 46.7%,52.9%and 52.7%pDp reduction compared to the minimal error approximate *** proposed multiplier is implemented in digital image processing which revealed 0.9810 Structural SIMilarity Index(SSIM),to the least,and less than 3%deviation in ECG signal processing application.

关键词： Approximate computing precise multiplier pp compression area-efficient error-recovery approach

phase transformation and crystal growth behavior of 8mol%(SmO1.5, GdO1.5, and YO1.5) stabilized ZrO2 powders

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International Journal of Minerals,Metallurgy and Materials 2017年第7期24卷 842-849页

作者： R.Mahendran S.p.Kumaresh Babu S.natarajan S.Manivannan A.Vallimanalan Department of Metallurgical and Materials Engineering National Institute of Technology Tirchirappalli 620015 Tamil Nadu india

Nanocrystalline powders of ZrO_2–8mol%SmO1.5（8Sm SZ）, ZrO_2–8mol%GdO1.5（8Gd SZ）, and ZrO_2–8mol%YO1.5（8YSZ） were prepared by a simple reverse-coprecipitation technique. Differential thermal analysis/thermogravimetry（DTA/TG）, Fourier transform infrared spectroscopy（FTIR）, X-ray diffraction（XRD）, Raman spectroscopy, and high-resolution transmission electron microscopy（HRTEM） were used to study the phase transformation and crystal growth behavior. The DTA results showed that the ZrO_2 freeze-dried precipitates crystallized at 529, 465, and 467°C in the case of 8Sm SZ, 8Gd SZ, and 8YSZ, respectively. The XRD and Raman results confirmed the presence of tetragonal ZrO_2 when the dried precipitates were calcined in the temperature range from 600 to 1000°C for 2 h. The crystallite size increased with increasing calcination temperature. The activation energies were calculated as 12.39, 12.45, and 16.59 k J/mol for 8Sm SZ, 8Gd SZ, and 8YSZ respectively.

关键词： zirconia thermal analysis reverse coprecipitation activation energy

Chemoprevention of neuroblastoma: progress and promise beyond uncertainties

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Journal of Cancer Metastasis and Treatment 2023年第1期9卷 307-327页

作者： natarajan Aravindan Mohan natarajan Dinesh Babu Somasundaram Sheeja Aravindan Department of Radiation Oncology University of Oklahoma Health Sciences CenterOklahoma CityOK 73104USA Stephenson Cancer Center Oklahoma CityOK 73104USA Department of pathology and Laboratory Medicine University of Texas Health Sciences Center at San AntonioSan AntonioTX 78229USA

Neuroblastoma is the most common extracranial solid tumor in children and comprises one-tenth of all childhood cancer *** current clinical therapy for this deadly disease is multimodal,involving an induction phase with alternating regimens of high-dose chemotherapeutic drugs and load reduction surgery;a consolidation phase with more intensive chemotherapy,radiotherapy,and stem cell transplant;and a maintenance phase with immunotherapy and immune-activating cytokine *** such intensive treatment,children with neuroblastoma have unacceptable life quality and survival,warranting preventive measures to regulate the cellular functions that orchestrate tumor progression,therapy resistance,metastasis,and tumor relapse/***,active efforts are underway to identify novel chemopreventive agents,define their mechanism(s)of action,and assess their clinical *** chemoprevention strategies(e.g.,retinoids,difluoromethylornithine)have already been adopted clinically as part of maintenance phase *** agents are in the pipeline,while many others are in preclinical *** we review the classes of chemopreventive agents investigated for neuroblastoma,including cellular events targeted,mode(s)of action,and the level of *** review:(i)highlights the pressing need for new and improved chemopreventive strategies for progressive neuroblastoma;(ii)lists the emerging classes of chemopreventive agents for neuroblastoma;and(iii)recognizes the relevance of targeting dynamically evolving hallmark functions of tumor evolution(e.g.,survival,differentiation,lineage transformation).With recent gains in the understanding of tumor evolution processes and preclinical and clinical efforts,it is our strong opinion that effective chemopreventive strategies for aggressive neuroblastoma are a near reality.

关键词： Neuroblastoma chemoprevention secondary and tertiary chemopreventive phytochemicals retinoids polyphenols terpenes DFMO apoptosis

Assessing combined toxic effects of tetracycline and p25 titanium dioxide nanoparticles using Allium cepa bioassay

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Frontiers of Environmental Science & Engineering 2021年第1期15卷 101-112页

作者： Barsha Roy Khushboo Kadam Suresh palamadai Krishnan Chandrasekaran natarajan Amitava Mukherjee School of Biosciences and Technology VITVellore 632014India Centre for Nanobiotechnology VITVellore 632014India

Usage of titanium dioxide nanoparticles(TiO_(2) Nps)and tetracycline(TC)has increased significantly in the present *** leads to their release and accumulation in the *** the compounds,individually,can have adverse toxic effects on the *** binary mixtures can increase this degree of *** present study aimed to evaluate the toxicity of both the contaminants in individual and binary mixtures in Allium ***,the toxicity of TiO_(2) Nps upon UVA pre-irradiation was also *** showed that UVA pre-irradiated Nps(UVA-TiO_(2) Nps)had a significant decrease in cell viability than their non-irradiated counterparts(NI-TiO_(2)),denoting an increase in photocatalytic activity upon UVA *** low concentrations of TC(EC10=0.016µmol/L)mixed with TiO2 Nps significantly increased the toxicity for both UVA-TiO_(2) and NI-TiO_(2) *** ROS generation was significantly high for UVA-TiO_(2) ***,TC did not have any effects on ROS *** the compounds exhibited genotoxic potential in *** chromosomal abnormalities like anaphase bridges,telophase bridges,laggard chromosomes,binucleate cells,*** *** binary mixture of UVA-TiO_(2) Nps and TC showed the highest chromosomal aberrations(64.0%±1.26%)than the mixture with NI-TiO_(2) or the individual *** decreased significantly after recovery(46.8%±1.92%),denoting the self-repair *** study proved that UVA-TiO2 Nps were more toxic and could be enhanced further when mixed with a sub-lethal concentration of *** work will help to assess the risk of both compounds in the environment.

关键词： Binary toxicity Cell viability Mitotic index Chromosomal aberration Reactive oxygen species Nanoparticles internalization

performance enhancement of futuristic airplanes by nature inspired biomimetic fish scale arrays--A design approach

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Biomimetic Intelligence & Robotics 2022年第2期2卷 32-47页

作者： Ganesh natarajan S Bruce Ralphin Rose J Department of Mechanical Engineering Anna University Regional Campus TirunelveliTamilnaduIndia

Biomimetics has an immense potential to drive the next generation of technologies forward by propounding competent solutions from *** decades,the nonsmooth topography of most living creatures has been critical to their existence and *** to human-made smooth surfaces,when adapted for fluid flow applications,nonsmooth surfaces can enhance the overall aerodynamic performance by reducing the drag ***,the bioinspired scale structure of fish has been identified as a key biomimetic derivative for improving the aerodynamic efficiency in various cross-domain *** study investigates the aerodynamics of a fish scale array(FSA)NACA 0021 model at a specific Reynolds number(Re)of approximately 2.46×105 that is meant for laminar flow conditions using Computational Fluid Dynamics(CFD)tools and a subsonic wind tunnel facility.A 3D printed biomimetic FSA film is developed and affixed on the NACA 0021 wing profile for the experimental investigation,followed by flow visualization through the smoke tunnel *** proved qualitatively under specific aerodynamic conditions,the creation of velocity streaks has a major role in the drag reduction *** obtain a clear perspective of flow across the overlapping fish scale structures,the results are focused on the central and overlapping regions of the FSA *** experiment has proved the existence of a combined formation of low and high velocity streaks in central and overlapping *** FSA 0021 model showed a maximum drag reduction of 9.57%,which was attributed to the streak formation phenomenon observed in the overlapping FSA configuration.

关键词： Biomimetics Aerodynamics Fish scale arrays Drag reduction Bioinspired design