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Analysis of interrelationship between pedestrian flow parameters using artificial neural network

Journal of modern Transportation 2015年第4期23卷 298-309页

作者： Pritikana Das m.parida V.K.Katiyar Centre for Transportation Systems Indian Institute of Technology Roorkee Department of Civil Engineering Transportation Engineering Group Indian Institute of Technology Roorkee Department of mathematics Indian Institute of Technology Roorkee

Pedestrian flow parameters are analysed in this study considering linear and non-linear relationships between stream flow parameters using conventional and soft computing approach. Speed-density relationship serves as a fundamental relationship, Single-regime con- cepts and deterministic models like Greenshield and Underwood were applied in the study to describe bidirec- tional flow characteristics on sidewalks and carriageways around transport terminals in India. Artificial Neural Net- work （ANN） approach is also used for traffic flow mod- elling to build a relationship between different pedestrian flow parameters. A non-linear model based on ANN is suggested and compared with the other deterministic models. Out of the aforesaid models, ANN model demonstrated good results based on accuracy measure- ment. Also these ANN models have an advantage in terms of their self-processing and intelligent behaviour. Flow parameters are estimated by ANN model using mFD （macroscopic Fundamental Diagram）. Estimated mean absolute error （mAE） and root mean square error （RmSE）values for the best fitted ANN model are 3.83 and 4.73 m/ min, respectively, less than those for the other models for sidewalk movement. Further estimated mAE and RmSE values of ANN model for carriageway movement are 4.02 and 4.98 m/min, respectively, which are comparatively less than those of the other models. ANN model gives better performance in fitness of model and future prediction of flow parameters. Also when using linear regression model between observed and estimated values for speed and flow parameters, performance of ANN model gives better fitness to predict data as compared to deterministic model. R value for speed data prediction is 0.756 and for flow data pre- diction is 0.997 using ANN model at sidewalk movement around transport terminal.

关键词： ANN Pedestrian flow modelling macroscopic flow diagram mAE RmSE

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Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.

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Chinese Journal of Oceanology and Limnology 2011年第1期29卷 162-166页

作者： GOPALAKRISHNAN Ayyaru RAJKUmAR mayalagu 孙军 parida Ajay VENmATHI mARAN Balu Alagar Centre of Advanced Study in marine Biology Annamalai University Institute of Oceanology Chinese Academy of Sciences m.S.Swaminathan Research Foundation Third Cross StreetInstitutional Area Takehara marine Science Station Graduate School of Biosphere ScienceHiroshima University

The efficacy of grass carp Ctenopharyngodon idella （Cyprinidae） and weevils Neochetina spp. （Curculionidae） to control the aquatic weed, water hyacinth, is investigated in a square net cage （happas） setting at a farm in Cuddalore District, South India. This novel combination of insects and fish is found to be superior to individual treatments for controlling the weed growth within ll0 d. The biomass of the weed, number of plants, percentage of flowered plants and chlorophyll contents were studied. The weed biomass is reduced from 5 kg （day 1） to 0.33 kg （day 110） when exposed to grass carp and weevils. The number of plants is reduced to 0.75 in grass carp and weevil exposed happas, while it is 741.5 in the control. The mean number of leaves per plant is also reduced. In addition, the chlorophyll a and b are significantly reduced in happas exposed to the combination of fish and insects when compared to the other treatments. Based on the results of this study, we consider the combined use of grass carp and weevils to be more efficient and sustainable for managing water hyacinths than the use of these organisms individually.

关键词： water hyacinth grass carp weevil biological control

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Response of Photonic Hydrogels of Homogeneous Particles to Uranyl Ions in Aqueous Solutions

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Photonic Sensors 2023年第4期13卷 50-61页

作者： R.G.JOSHI Deepak K.GUPTA P.AmESH P.K.parida T.R.RAVINDRAN materials Science Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National InstituteKalpakkam 603102India materials Chemistry and metal Fuel Cycle Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National InstituteKalpakkam 603102India metallurgy and materials Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National Institute(HBNI)Kalpakkam 603102India

We study here the response of photonic hydrogels(PHs),made of photonic crystals of homogeneous silica particles in polyacrylamide hydrogels(SPHs),to the uranyl ions 22 UO_(2)^(2+) in aqueous *** is found that the reflection spectra of the SPH show a peak due to the Bragg diffraction,which exhibits a blue shift in the presence of 22 UO_(2)^(2+).Upon exposure to the SPH,22 UO_(2)^(2+)gets adsorbed on the SPH and forms complex coordinate bonds with multiple ligands on the SPH,which causes shrinking of hydrogel and leads to the blue shift in the diffraction *** amount of the blue shift in the diffraction peak increases monotonically up to 22 UO_(2)^(2+)concentrations as high as 2300μ*** equilibration time for the shift in the Bragg peak upon exposure to 22 UO_(2)^(2+)is found to be~30 *** results are in contrast to the earlier reports on photonic hydrogels of inhomogeneous microgel particles hydrogel(mPH),which shows the threshold 22 UO_(2)^(2+)concentration of~600μm,below which the diffraction peak exhibits a blue shift and a change to a red shift above *** equilibration time for mPH is~300 *** observed monotonic blue shift and the faster time response of the SPH to 22 UO_(2)^(2+)as compared to the mPH are explained in terms of homogeneous nature of silica particles in the SPH,against the porous and polymeric nature of microgels in the *** also study the extraction of 22 UO_(2)^(2+)from aqueous solutions using the *** extraction capacity estimated by the arsenazo-III analysis is found to be 112 mm/kg.

关键词： Photonic hydrogels uranium extraction and monitoring arsenazo-Ⅲ-uranium complex polyacrylamide hydrogel UV-visible spectroscopy

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Diversity of Sodium Transporter HKT1;5 in Genus Oryza

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Rice science 2022年第1期29卷 31-46,I0002-I0017页

作者： Shalini PULIPATI Suji SOmASUNDARAm Nitika RANA Kavitha KUmARESAN mohamed SHAFI Peter CIVÁŇ Gothandapani SELLAmUTHU Deepa JAGANATHAN Prasanna Venkatesan RAmARAVI S.PUNITHA Kalaimani RAJU Shrikant S.mANTRI R.SOWDHAmINI Ajay parida Gayatri VENKATARAmAN m.S.Swaminathan Research Foundation Chennai 600113India National Agri-Food Biotechnology Institute Punjab 140306India Krishi Vigyan Kendra Kanyakumari 629901India National Centre for Biological Sciences/Tata Institute of Fundamental Research Bangalore 560065India National Research Institute for Agriculture Food and Environment UniversityClermont-AuvergneClermont-Ferrand 63000France Forest molecular Entomology Laboratory Faculty of Forestry and Wood SciencesCzech University of Life SciencesPraguePraha 16500Czech Republic Tamil Nadu Agricultural University Coimbatore 641003India International Business machines India Chennai 600125India Institute of Life Sciences Bhubaneswar 751023India

Asian cultivated rice shows allelic variation in sodium transporter,OsHKT1;5,correlating with shoot sodium exclusion(salinity tolerance).These changes map to intra/extracellularly-oriented loops that occur between four transmembrane-P loop-transmembrane(mPm)motifs in OsHKT1;***1;5 sequences from more recently evolved Oryza species(***/*** complex species)contain two expansions that involve two intracellularly oriented loops/helical regions between mPm domains,potentially governing transport characteristics,while more ancestral HKT1;5 sequences have shorter intracellular *** compared homology models for homoeologous OcHKT 1;5-K and OcHKT1;5-L from halophytic *** to identify complementary amino acid residues in OcHKT1;5-L that potentially enhance affinity for Na+.Using haplotyping,we showed that Asian cultivated rice accessions only have a fraction of HKT1;5 diversity available in progenitor wild rice species(*** and ***).Progenitor HKT1;5 haplotypes can thus be used as novel potential donors for enhancing cultivated rice salinity *** Asian rice accessions,10 non-synonymous HKT1;5 haplotypic groups *** HKT1;5 haplotypic diversities occur in cultivated indica gene pool compared to *** Haplotypes 2 and 10 occur in mutually exclusive japonica and indica groups,corresponding to haplotypes in *** salt-sensitive and salt-tolerant landraces,*** distinct haplotype partitioning may have originated in separate ancestral gene pools of indica and japonica,or from different haplotypes selected during *** of specific HKT1;5 haplotypes within the 3000 rice dataset may relate to eco-physiological fitness in specific geo-climatic and/or edaphic contexts.

关键词： HKT1 5 diversity single nucleotide polymorphism haplotype bacterial artificial chromosome salinity tolerance sodium transporter Oryza species

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A Novel Approach for the Synthesis of (R) and (S)-Nicotine

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International Journal of Organic Chemistry 2022年第4期12卷 189-199页

作者： Rohith Kumar Agarthimoole Sahir Gagan Sudesna parida Tarur Konikkaledom Dinesh maheswaran S. Karatholuvhu Namasivayam Palani Soumitra mukherjee ITC Limited ITC Life Sciences and Technology Centre Peenya Industrial Area Phase I Bangalore India Presently at Department of Atmospheric Sciences Texas A&M University College Station Texas USA

Nicotine is an alkaloid mainly found in leaves of tobacco and is used therapeutically for patients seeking relief from tobacco dependence in the form of products such as gums, patches, lozenges etc. In these products, majorly nicotine derived from tobacco is used which is inherently contaminated with undesirable nicotine related substances as impurities at low levels and is difficult to remove. Hence, use of synthetic nicotine is considered as an option which will be devoid of such impurities. In this work, a short and efficient synthesis of (R) and (S) nicotine was achieved by leveraging a key esterification between racemic homoallylic alcohol intermediate (2) and (S)-Ibuprofen (3) to produce diastereomers (5a) and (5b) which were easily separable under standard column chromatography conditions. Use of (S)-Ibuprofen (3) as a chiral resolving agent constitutes a novel approach which was not reported earlier. A subsequent hydrolysis of the diastereomers furnished the homoallylic alcohol intermediates (S)-6a and (R)-6a with high enantiopurity, which was effectively translated to the corresponding (R)-nicotine and (S)-nicotine respectively.

关键词： Nicotine Ibuprofen Diastereomers Column Chromatography Chiral Purity

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关于m_nO2的研究——Ⅰ.某些不同结晶变体人造mnO2的化学组成、显微结构和其它特征（下）

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电池 1983年第1期 27-32页

作者： K.m.parida,S.B.Kanungo,B.R.Sant,杨绮琴中山大学印度印度印度

晶胞参数属于不同结晶体系的mnO2试样的晶胞参数如表6所示。每一结晶体系,往计算机输入观测的hkl与θ值,用适当的FORTRAN Ⅳ程序计算a0、b0与c0值,进行了最小二乘法的晶胞精化。由化学分

关键词： mnO2 阴离子空位填隙点缺陷晶胞参数 mnO2 正离子阳离子晶胞体积变体

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关于m_nO2的研究—Ⅰ.某些不同结晶变体人造mnO2的化学组成、显微结构和其它特征（上）

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电池 1982年第4期 23-29+60页

作者： K.m.parida,S.B.Kanungo,B.R.Sant,杨绮琴中山大学印度印度印度

制备出一些属于不同结晶变体的人造mnO2试样,为了以后研究这些试样的电化学活性和催化活性,对它们的物理化学性质,例如化学组成,由X射线衍射数据揭示的显微结构特点,密度,表面积和27℃的磁化率进行了研究,以便表征试样的特性。发现几乎... 详细信息

制备出一些属于不同结晶变体的人造mnO2试样,为了以后研究这些试样的电化学活性和催化活性,对它们的物理化学性质,例如化学组成,由X射线衍射数据揭示的显微结构特点,密度,表面积和27℃的磁化率进行了研究,以便表征试样的特性。发现几乎所有试样实质上都是非化学计量的,在许多情况下它们的组成和晶胞参数都偏离文献数值。然而实测密度取决于试样的性质,与在阴离子空位或填隙阳离子基础上计算出来的数值很一致。虽则从表面积的测量得不到关于试样特性的一定结论,而磁化率数据都不仅有助于表征不同类型的mnO2,而且也和非化学计量有关。

关键词： mnO2 化学组成化学成分 mnO2 显微结构粉末衍射射线衍射悬浮物悬浮体晶体结构结晶构造固体结构衍射线表面积化学活性变体

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关于mnO2的研究——Ⅲ.H2O2在mnO2的不同结晶变体上催化分解的动力学与机理（上）

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电池 1984年第1期 25-30页

作者： S.B.Kanungo,K.m.parida,B.R.Sant,杨绮琴中山大学印度印度印度

在温度为20—30℃和PH为3—14范围内,研究了H2O2水溶液在不同结晶变体的mnO2上的催化分解。活性点在PH3—8范围内是mn4+,在8—14范围内是mn3+。PH约为11.5—12.0时,催化活性达到最大值,然后随PH进一步增加而减少。实验的速度数据符合于... 详细信息

在温度为20—30℃和PH为3—14范围内,研究了H2O2水溶液在不同结晶变体的mnO2上的催化分解。活性点在PH3—8范围内是mn4+,在8—14范围内是mn3+。PH约为11.5—12.0时,催化活性达到最大值,然后随PH进一步增加而减少。实验的速度数据符合于在上述考虑基础上提出的机理。找到催化活性与试样的某些物理化学特性如表面氧、表面OH基,晶格参数的关系,而催化活性与mnO2的电化学或放电容量的关系却有些复杂。虽然某些试样（主要是γ—mnO2）的放电容量随催化活性的增加而增加,但有些属于α、β与δ类的试样明显偏离上述行为。这从在主体晶格中出现mnOOH得到解释。

关键词：催化分解表面积 mnO H2O2 mnO2 原子数目分解速度动力学变体

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关于mnO2的研究——Ⅱ、某些不同晶型人造mnO2的物理化学性质与电化学活性的关系（上）

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电池 1983年第3期 23-28页

作者： S.B.Kanungo,K.m.parida,B.R.San,刘冠昆中山大学印度印度印度

本文采用放电的方法,测定了许多不同结晶变体的人造mnO2试样的电化学活性,用于放电的含有0.150克mnO2和0.015克乙炔黑的薄片,放在NH4OH—ZnCl2（PH4.1）和9mKOH介质中。试图找到放电容量（到达0.6伏的时间）和各种物理化学性质如密度、... 详细信息

本文采用放电的方法,测定了许多不同结晶变体的人造mnO2试样的电化学活性,用于放电的含有0.150克mnO2和0.015克乙炔黑的薄片,放在NH4OH—ZnCl2（PH4.1）和9mKOH介质中。试图找到放电容量（到达0.6伏的时间）和各种物理化学性质如密度、表面积、晶格参数、表面OH基团、表面氧、磁化率等的相互关系。γmnO2的放电容量随其真密度和堆砌密度（粉密度）的增加而增大,而随表面积的增大倾向于减小。对于其他mnO2的变体,放电容量和上面所述试样的各种性质存在直接的关系。晶格参数和放电容量的关系表明具有外延ab面的试样一般具有更高的活性。也可以观察到,当规定单位重量时表面OH基团和表面氧不仅是具有活性的mnO2的重要性质,而且还有相互的联系。

关键词：放电容量晶格参数晶格常数 mnO2 化学活性电解液物理化学性质

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关于mnO2的研究——Ⅱ、某些不同晶型人造mnO2的物理化学性质与电化学活性的关系（下）

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电池 1983年第4期 22-26页

作者： S.B.Kanungo,K.m.parida,B.R.Sant,刘冠昆印度印度印度

它们的晶格常数不能测量,故对于δ-mnO2,仅以修正游离水含量的比重瓶测的密度作用。这图表明较重或较紧密的试样的活性的比轻或疏松试样的活性大。图6表示的mnO2堆砌密度和放电容量之间的关系进一步证实了这一点。除了属于β-mnO2类型... 详细信息

它们的晶格常数不能测量,故对于δ-mnO2,仅以修正游离水含量的比重瓶测的密度作用。这图表明较重或较紧密的试样的活性的比轻或疏松试样的活性大。图6表示的mnO2堆砌密度和放电容量之间的关系进一步证实了这一点。除了属于β-mnO2类型的试样外（12、15和16号）,甚至在不同的多晶型物中,电化学活性随粉状物的堆砌密度的增加而增大。

关键词：放电容量磁化率 OH 基团 mnO2 堆砌密度晶型

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