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Rare Metals 2021年第1期40卷 231-236页

作者： Natesan Shanmuga priya Chandramohan Somayaji S.kanagaraj Siddaganga Institute of Technology TumkurKarnataka 572103India Indian institute of Technology Guwahati 781039India

Cerium and cerium-based oxides are found to be an important element in three-way catalytic converter(TWC).The effective utilization of TWC is found to be reduced due to thermal loading which results in structural deformation of ceria,Doping Zr^(4+)into the rare earth element can increase the oxygen storage capacity and thermal ***,an attempt was made to study the oxygen storage capacity and thermal stability of ceria by doping Zr^(4+)and Nd^(3+).Cerium-based nanocrystallite in the composition of Ce_(0.6)Zr_(0.4-x)Nd_(1.3)xO_(2)(0≤x≤0.4)was prepared by sol-gel synthesize technique with citric acid as a gel-forming agent.X-ray diffraction(XRD)result shows that doping Nd^(3+)into ceria lattice forms homogenous solid solution of cubic fluorite structure up to 25%of substitute *** higher amount of Nd^(3+)into ceria lattice leads to the formation of Nd_(2)O_(3).Raman spectrum study confirms that oxygen storage capacity band is present in Ce_(0.6)Zr_(0.4)O2 and Ce_(0.6)Zr_(0.3)Nd_(0.13)O_(2).The oxygen storage capacity was calculated through weight loss of the sample during the second heating cycle with cyclic heating from30 to 800℃in thermogravimetric analysis(TGA).The TGA study reveals that the oxygen storage capacity of Ce_(0.6)Zr_(0.4)O2 decreases after the substitution of Nd^(3+),which is due to the larger ionic radius of Nd^(3+)compared with that of Zr4+and CeO2.

关键词： Cerium oxide Sol-gel technique Thermogravimetric analysis Ionic radius Homogeneous solid solution Oxygen storage capacity

An approach towards identification of leather from leather-like polymeric material using FTIR-ATR technique

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Collagen and Leather 2023年第4期6卷 67-75页

作者： priya Narayanan Sreeram kalarical Janardhanan Central Leather Research Institute-CSIR AdyarChennai 600020India

Leather,a by-product of the meat industry,has unique strength,elasticity,water vapor permeability,resistance to abrasion,durability,and *** the background of ISO 15115:2019,the authenticity of leather has become a subject matter of *** is a need to distinguish leather(animal origin)from other leather-like materials derived from fossil fuel(PU,faux leather,etc.)and agro-product-driven vegan materials,which are also sold in the market as *** this purpose,this work relies on the signature FTIR bands of collagen(the skin-making protein)as a starting point to distinguish between animal origin and rest.A detailed investigation of all types of materials used in lifestyle products has been carried out to assess the boundary lines of this *** is reasonably concluded that the signature AmideⅠ,Ⅱ,andⅢbands of collagen occurring at 1600,1500,and 1200 cm^(-1)could serve as the first line to distinguish against all materials other than nylon and in the case of nylon,and the Amide A band at 3200 cm^(-1),forms the basis for differentiation from *** essence,the FTIR spectra can be used as a robust,easy and unambiguous technique to distinguish leather from leather-like materials currently available on the market.

关键词： Leather Synthetic leather-like polymeric material Non-destructive Collagen FTIR-ATR

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Study of Factors Associated with Knowledge, Attitudes and Practices Regarding Rabies in the Commune of Niakhéne in Senegal, in 2022

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Open Journal of Epidemiology 2024年第1期14卷 180-197页

作者： Boubacar Gueye Martial Coly Bop Ndéye Marième Diagne Khadija Barro Cheikh Tacko Diop Alioune Badara Tall Papa Gallo Sow Mountaga Dia Abdoul Aziz Ndiaye Ousseynou ka Training and Research Unit for Health and Sustainable Development Alioune Diop University of Bambeye Bambeye Senegal Dakar Principal Hospital Dakar Senegal Health and Development Institute Cheikh Anta Diop University of Dakar Dakar Senegal

Introduction: Rabies is a serious disease, as it is always fatal, but it can be prevented by sero-vaccination. It is a neglected tropical disease endemic in Asia and Africa. The aim of this study was to assess knowledge, attitudes and practices regarding rabies and to determine the factors associated with them among people aged 18 and over in the commune of Niakhène. Methods: This was a cross-sectional, descriptive and analytical survey of subjects aged 18 and over living in the commune of Niakhène. A sample of 300 individuals was drawn from a two-stage cluster survey stratified by age and sex. Bivariate analysis was performed using association tests. Results: The mean age of respondents was 35.3 ± 16.9 years. It was noted that 67% (201) of respondents had a good knowledge of rabies. The results showed that 7.3% (22) of respondents owned a dog. Of the 278 people who did not own a dog, 78.4% (218) said they would have vaccinated their dog if they had had one. It should be noted that 83.7% (251) of respondents said they would go to a health facility if an animal bit them. None of the dog owners had vaccinated their dogs against rabies. Of the 41 people exposed to rabies, 39% went to a health facility. The age and education of the respondents had statistically significant associations with knowledge of rabies. Respondents’ age and education were statistically significantly related to whether they had vaccinated a domestic dog. The age, education and economic well-being quintile of respondents’ households had statistically significant associations with the use of a health facility in the event of being bitten or scratched by an animal vector. The education of respondents who had been bitten by an animal vector was statistically significantly associated with the use of a health facility. Conclusion: It would be imperative for human and animal health authorities to collaborate in a “One Health” approach in order to increase knowledge and promote the adoption of good pract

关键词： Rabies Knowledge Attitudes Practices Associated Factors Senegal

TS-Aug架构的半监督自训练情感分类算法

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南京师范大学学报（工程技术版） 2024年第1期24卷 45-52页

作者：郭卡王芳安徽外国语学院信息与数学学院安徽合肥231200

网络教学资源的普及使得资源评价的文本数据规模逐步增大.传统的有监督学习文本分类对标注数据的依赖度较高,需要足够的数据量和高质量数据才能得到良好的结果.在网络教学资源的评价文本工作中,由于标注数据难以获取且质量参差不齐,使... 详细信息

网络教学资源的普及使得资源评价的文本数据规模逐步增大.传统的有监督学习文本分类对标注数据的依赖度较高,需要足够的数据量和高质量数据才能得到良好的结果.在网络教学资源的评价文本工作中,由于标注数据难以获取且质量参差不齐,使得这一任务的难度越来越高.针对这一困难,提出一种TS-Aug半监督自训练方案,通过添加无标签数据并进行伪标签训练,能在强力数据增广的作用下大幅扩充样本集,解决数据增广中的过拟合风险.首先利用标注数据和弱增广策略进行初始化监督训练,然后利用无标注数据和强增广策略进行半监督训练,最后使用标注数据进行微调监督训练.在自建的在线课程评论数据中,能将分类F 1-Score从0.88提升至0.95,表明TS-Aug半监督自训练方案在文本分类任务中具有较好的应用前景.

关键词：少样本学习半监督训练数据增广情感分类

A comprehensive review of significant researches on content based indexing and retrieval of visual information

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Frontiers of Computer Science 2013年第5期7卷 782-799页

作者： R. priya T. N. SHANMUGAM Department of Mathematics Anna University-Chennai Chennai 600 025 India

Developments in multimedia technologies have paved way for the storage of huge collections of video doc- uments on computer systems. It is essential to design tools for content-based access to the documents, so as to allow an efficient exploitation of these collections. Content based anal- ysis provides a flexible and powerful way to access video data when compared with the other traditional video analysis tech- niques. The area of content based video indexing and retrieval （CBVIR）, focusing on automating the indexing, retrieval and management of video, has attracted extensive research in the last decade. CBVIR is a lively area of research with endur- ing acknowledgments from several domains. Herein a vital assessment of contemporary researches associated with the content-based indexing and retrieval of visual information. In this paper, we present an extensive review of significant researches on CBV1R. Concise description of content based video analysis along with the techniques associated with the content based video indexing and retrieval is presented.

关键词： nultimedia information content based video retrieval (CBVR) content based video indexing and retrieval (CBVIR) shot segmentation object segmentation feature extraction indexing motion estimation querying key frame retrieval and indexing.

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利用择形分子筛异构化亚甲基二苯胺

Chinese Journal of Catalysis 2024年第7期62卷 124-130页

作者： Sam Van Minnebruggen ka Yan Cheung Trees De Baerdemaeker Niels Van Velthoven Matthias Degelin Galahad O’Rourke Hiroto Toyoda Andree Iemhoff Imke Muller Andrei-Nicolae Parvulescu Torsten Mattke Jens Ferbitz 吴勤明肖丰收 Toshiyuki Yokoi Nils Bottke Dirk De Vos 巴斯夫股份有限公司膜分离、吸附、催化和光谱学可持续解决方案中心(cMACS) 比利时巴斯夫股份有限公司研究组德国东京工业大学纳米空间催化研究所横滨日本浙江大学化学系浙江杭州310028

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能... 详细信息

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能将其有效地转化为4,4'-MDA,将能显著提升其附加值.本文在使用苯胺的条件下,利用β分子筛等催化剂,通过双分子机制,可以选择性地将2,4'-MDA异构化为4,4'-MDA.尽管实验显示,多种酸性沸石具有较高的异构化活性,但MCM-68(具有MSE拓扑结构)的催化性能尤为出色,它不仅展现出高异构化活性,而且具有很好的选择性.MCM-68主要催化2,4'-MDA异构化为4,4'-MDA,而2,2'-MDA和低聚物的形成则可以忽略不计.本文还深入探讨了该择形作用的原因,并详细研究了酸位置在MSE分子筛孔道限制中的关键作用.

关键词：铝分布多相催化异构化亚甲基二苯胺聚氨酯择形

Continuous Mixed p-norm Control Scheme with Reweighted L_(0) norm Variable Step Size for Mitigating Power Quality Problems of Grid Coupled Solar PV Systems

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1394-1404页

作者： Pallavi Verma Avdhesh Kumar Rachana Garg priya Mahajan Delhi technological university DelhiDelhi 110085India.

In this paper,the performance of a two-stage three-phase grid coupled solar photovoltaic generating system(SPVGS)is analyzed by using a novel reweighted Lo norm variable step size continuous mixed p-norm(RLo-VSSCMPN)of a voltage source inverter(VSI)control *** efficacy of the system is determined by considering unbalanced grid voltage,DC offset,voltage sag and swell,unbalanced load and variations in solar ***-VSSCMPN is used for inverter control and it ex-tracts fundamental components of load current for generating the reference grid current with a faster convergence rate and lesser steady state *** the proposed control,harmonics in the grid current follows the IEEE-519 norm and the performance is also satisfactory under varying environmental/load *** power generated from SPvGS is transferred optimally using a DC-DC boost converter utilizing the incremental conductance(INC)maximum power point *** proposed system is simulated using MATLAB/Simulink 2018a and test results are verified experimentally using dSPACE1202 in the laboratory to ensure the validity of a novel proposed robust *** Terms-INC maximum power point tracker,power quality,reweighted LoVSSCMPN algorithm,solar PV generating system,total harmonic distortion,voltage source inverter.

关键词： INC maximum power point tracker power quality reweighted LoVSSCMPN algorithm solar PV generating system total harmonic distortion voltage source inverter.

Characterization of cytotoxic compound from marine sediment derived actinomycete Streptomyces avidinii strain SU4

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Asian Pacific Journal of Tropical Biomedicine 2012年第10期2卷 770-773页

作者： Sudha S Masilamani selvam M Research Scholar Department of BiotechnologySathyabama UniversityJeppiaar NagarRajiv Gandhi Salai Associate professor Department of BiotechnologySathyabama UniversityJeppiaar NagarRajiv Gandhi Salai

To investigate the cytotoxic activity of actinomycete isolated from marine sediment. Methods: In the present study the DNA was isolated and the ITS region of 16s rRNA was amplified by polymerase chain reaction, using two universal bacterial primers, 1492R (5′-GGTTACCTTGTTAC GACTT-3′) and Eubac27F (5′-AGAGTTTGATCCTGGCTC AG-3′). The amplified products were purified using TIANgel mini purification kit, ligated to MD18-T simple vector (TakaRa), and transformed into competent cells of Escherichia coli DH5α. 16S rRNA gene fragment was sequenced using forward primer M13F (-47) and reverse primer M13R (-48). Blast search sequence similarity was found against the existing non-redundant nucleotide sequence database thus, identified as Streptomyces sp SU, Streptomyces rubralavandulae strain SU1, Streptomyces cacaoi strain SU2, Streptomyces cavourensis strain SU3, Streptomyces avidinii strain SU4, Streptomyces globisporus strain SU5, Streptomyces variabilis strain SU6, Streptomycescoelicolor strain SU 7. Among the eight identified isolates, one actinomycete Streptomyces avidinii strain SU4 was selected for further study. Results: Crude extract of the actinomycete isolate exhibited IC50 in 64.5 μg against Hep-2 cell line, 250 μg in VERO cell line. This value is very close to the criteria of cytotoxicity activity for the crude extracts, as established by the American National Cancer Institute (NCI) is in IC50 < 30 μg /mL. The GC MS analysis showed that the active principle might be 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester (12.17%), isooctyl phthalate (15.29%) with the retention time 15.642 and 21.612, respectively. Conclusions: This study clearly proves that the marine sediment derived actinomycetes with bioactive metabolites can be expected to provide high quality biological material for high throughout biochemical and anticancer screening programs. These results help us to conclude that the potential of using metabolic engineering and post genomic approaches to i

关键词： Actinomycetes Cytotoxicity ITS sequencing GC MS Streptomyces avidinii Characterization Cytotoxic compound Extra cellular metabolite

Molecular modeling studies of repandusinic acid as potent small molecule for hepatitis B virus through molecular docking and ADME analysis

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Quantitative Biology 2019年第4期7卷 302-312页

作者： Vijayakumar Subramaniyan Reetha Sekar Arulmozhi Praveenkumar Rajalakshmi selvam Computational Phytochemistry Lab PG and Research Department of Botany and Microbiology AWM Sri Pushpam College(Autonomous)Tamil Nadu613503India

Background:Hepatitis B virus(HBV)has affected over 300 million people worldwide which causes to induce mostly liver disease and liver *** is a member of the family Hepadnaviridae which is a small DNA virus with unusual characters like ***,hepatoprotective drugs provoke some side effects in human *** the reason,this study aims to identify alternative drug molecules from the natural source of medicinal plants with smaller quantity of side effects than those conventional drugs in treating ***:We developed computational methods for calculating drug and target binding resemblance using the Maestro v10.2 of Schrodinger *** target and ligand molecules were obtained from recognized *** molecules of 40 phytoconstituents were retrieved from variety of plants after we executed crucial analyses such as molecular docking and absorption,distribution,metabolism,and excretion(ADME)***:In the docking analysis,the natural analogues repandusinic acid showed better docking scores of-14.768 with good binding *** remaining bioactive molecules corilagin,furosin,nirurin,iso-quercetin and gallocatechin also showed better docking ***:This computational analysis reveals that repandusinic acid is a suitable drug candidate for ***,we recommend that this analogue is suitable in further exploration using in vitro studies.

关键词： hepatitis B virus phytoconstituents molecular docking ADMET analysis

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梁晋争衡时期河北“衢地”考论

山西大同大学学报（社会科学版） 2024年第3期38卷 55-59页

作者：屈卡乐巢湖学院马克思主义学院安徽合肥230000

晚唐五代梁晋争衡时期,河北方镇拥有较强的政治军事实力,且掌握着由河北进出河东的主要交通路线,成为影响梁晋力量平衡的“衢地”。在梁晋争衡前期,朱温采用军事威慑和政治笼络双重手段,将魏博、成德、义武等镇拉入梁军阵营。但是,朱梁... 详细信息

晚唐五代梁晋争衡时期,河北方镇拥有较强的政治军事实力,且掌握着由河北进出河东的主要交通路线,成为影响梁晋力量平衡的“衢地”。在梁晋争衡前期,朱温采用军事威慑和政治笼络双重手段,将魏博、成德、义武等镇拉入梁军阵营。但是,朱梁集团对河北方镇更多地采用军事威慑,试图实现对成德、义武等镇的实质控制。这种高压的举措遭到河北方镇的抵制,使得后梁失去了对河北“衢地”的控制,在梁晋争衡中渐落下风。

关键词：梁晋争衡河北方镇衢地