检索结果-南通市图书馆

Implications of future climate change on crop and irrigation water requirements in a semi-arid river basin using CMIP6 GCMs

引用

Journal of Arid Land 2022年第11期14卷 1234-1257页

作者： kunal kARAN Dharmaveer singh pushpendra k singh Birendra BHARATI Tarun P singh Ronny BERNDTSSON Department of Water Engineering and Management Central University of JharkhandBrambeRanchi 835205India Symbiosis Institute of Geo-informatics Symbiosis International(Deemed University)Pune 411016India Water Resources Systems Division National Institute of HydrologyRoorkee 247667India Division of Water Resources Engineering&Centre for Advanced Middle Eastern Studies Lund UniversityLund Box 11722100Sweden

Agriculture faces risks due to increasing stress from climate change,particularly in semi-arid *** of understanding of crop water requirement(CWR)and irrigation water requirement(IWR)in a changing climate may result in crop failure and socioeconomic problems that can become detrimental to agriculture-based economies in emerging nations *** research in CWR and IWR has largely focused on large river basins and scenarios from the Coupled Model Intercomparison Project Phase 3(CMIP3)and Coupled Model Intercomparison Project Phase 5(CMIP5)to account for the impacts of climate change on *** basins,however,are more susceptible to regional climate change,with more significant impacts on *** study estimates CWRs and IWRs for five crops(sugarcane,wheat,cotton,sorghum,and soybean)in the Pravara River Basin(area of 6537 km^(2))of India using outputs from the most recent Coupled Model Intercomparison Project Phase 6(CMIP6)General Circulation Models(GCMs)under Shared Socio-economic Pathway(SSP)245 and SSP585 *** increase in mean annual rainfall is projected under both scenarios in the 2050s and 2080s using ten selected CMIP6 *** for all crops may decline in almost all of the CMIP6 GCMs in the 2050s and 2080s(with the exceptions of ACCESS-CM-2 and ACCESS-ESM-1.5)under SSP245 and SSP585 *** availability of increasing soil moisture in the root zone due to increasing rainfall and a decrease in the projected maximum temperature may be responsible for this decline in ***,except for soybean and cotton,the projected IWRs for all other three crops under SSP245 and SSP585 scenarios show a decrease or a small increase in the 2050s and 2080s in most CMIP6 *** findings are important for agricultural researchers and water resource managers to implement long-term crop planning techniques and to reduce the negative impacts of climate change and associated rainfall variability to avert crop failure and agricultural

关键词： climate change crop water requirement irrigation water requirement CMIP6 GCMs emission scenario Pravara River Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Approach Using Fuzzy Sets and Boosting Techniques to Predict Liver Disease

引用

Computers, Materials & Continua 2021年第9期68卷 3513-3529页

作者： pushpendra kumar Ramjeevan singh Thakur Maulana Azad National Institute of Technology BhopalIndia Central University of Jharkhand RanchiIndia

The aim of this research is to develop a mechanism to help medical practitioners predict and diagnose liver *** systems have been proposed to help medical experts by diminishing error and increasing accuracy in diagnosing and predicting *** many existing methods,a few have considered the class imbalance issues of liver disorder *** all the samples of liver disorder datasets are not useful,they do not contribute to learning about classifiers.A few samples might be redundant,which can increase the computational cost and affect the performance of the *** this paper,a model has been proposed that combines noise filter,fuzzy sets,and boosting techniques(NFFBTs)for liver disease ***,the noise filter(NF)eliminates the outliers from the minority class and removes the outlier and redundant pair from the majority ***,the fuzzy set concept is applied to handle uncertainty in ***,the AdaBoost boosting algorithm is trained with several learners viz,random forest(RF),support vector machine(SVM),logistic regression(LR),and naive Bayes(NB).The proposed NFFBT prediction system was applied to two datasets(i.e.,ILPD and MPRLPD)and found that AdaBoost with RF yielded 90.65%and 98.95%accuracy and F1 scores of 92.09%and 99.24%over ILPD and MPRLPD datasets,respectively.

关键词： Fuzzy set imbalanced data liver disease prediction machine learning noise filter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of rockfall-prone road cut slope near Lengpui Airport,Mizoram,India

引用

Journal of Rock Mechanics and Geotechnical Engineering 2019年第1期11卷 146-158页

作者： A.k.Verma Sahil Sardana pushpendra Sharma Lal Dinpuia T.N.singh Department of Mining Engineering Indian Institute of Technology (Banaras Hindu Universiy) Department of Mining Engineering Indian Institute of Technology (Indian School of Mines) Department of Civil Engineering Lassonde School of Engineering York University Department of Ceology Pachhunga University College Department of Earth Sciences Indian Institute of Technology Bombay

Rockfall is one of severe natural hazards that are frequently reported in northeast region of India. It carries rock block falling from the cliff with high velocities and energies which can result in damages to vehicles, disruption to transportation, injuries and fatalities. The massive rockfall event which occurred in April 2017 on the highway NH-44 A, near Lengpui Airport, blocked the traffic for 1 d, and fortunately,no casualties were reported as the event occurred in the night. This is the only highway connecting the Aizawl city to the airport and the region is highly prone to rockfall events. Hence assessment of rockfall along this highway is necessary. In the current study, rockfall hazard assessment has been carried out on three locations by rockfall hazard rating system(RHRS). During pre-failure analysis, the result shows that most hazardous slopes have RHRS score of 639. The slopes were found to be vulnerable and later on the rockfall activity occurred. Three-dimensional(3 D) stability analysis has been carried out using 3 DEC software package to analyze the failure behavior and to decide the rockfall-prone zone(unstable blocks)for slope. The total displacement of 2.24 cm and velocity of 2,25 mm/s of the failed block have been observed in the numerical analysis. Further, the rockfall vulnerable zone(unstable blocks) is considered to determine the parameters such as run-out distance, bounce height and energies of the falling rock blocks. The maximum total kinetic energy of 5047 kJ has been observed in the numerical analysis with the maximum run-out distance up to 18 m.

关键词： Rockfall hazards Rockfall simulation Rockfall hazard rating system(RHRS) Road cut slopes Slope stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Particles dispersion on fluid-liquid interfaces

引用

Particuology 2011年第1期9卷 1-13页

作者： Sathish Gurupatham Bhavin Dalal Md.Shahadat Hossain Ian S.Fischer pushpendra singh Daniel D.Joseph Department of Mechanical Engineering New Jersey Institute of Technology Department of Aerospace Engineering and Mechanics University of Minnesota Department of Mechanical and Aerospace Engineering University of California Irvine

This paper is concerned with the dispersion of particles on the fluid-liquid interface. In a previous study we have shown that when small particles, e.g., flour, pollen, glass beads, etc., contact an air-liquid interface, they disperse rapidly as if they were in an explosion. The rapid dispersion is due to the fact that the capillary force pulls particles into the interface causing them to accelerate to a large velocity. In this paper we show that motion of particles normal to the interface is inertia dominated; they oscillate vertically about their equilibrium position before coming to rest under viscous drag. This vertical motion of a particle causes a radially-outward lateral （secondary） flow on the interface that causes nearby particles to move away. The dispersion on a liquid-liquid interface, which is the primary focus of this study, was relatively weaker than on an air-liquid interface, and occurred over a longer period of time. When falling through an upper liquid the particles have a slower velocity than when falling through air because the liquid has a greater viscosity. Another difference for the liquid-liquid interface is that the separation of particles begins in the upper liquid before the particles reach the interface. The rate of dispersion depended on the size of the particles, the densities of the particle and liquids, the viscosities of the liquids involved, and the contact angle. For small particles, partial pinning and hysteresis of the three-phase contact line on the surface of the particle during adsorption on liquid-liquid interfaces was also important. The frequency of oscillation of particles about their floating equilibrium increased with decreasing particle size on both air-water and liquid-liquid interfaces, and the time to reach equilibrium decreased with decreasing particle size. These results are in agreement with our analysis.

关键词： Adsorption Interfacial tension Particle dispersion Fluid–liquid interface Capillary force Viscous drag

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Use of methylation filtration and Cot fractionation for analysis of genome composition and comparative genomics in bread wheat

引用

Journal of Genetics and Genomics 2011年第7期38卷 315-325页

作者： Rajib Bandopadhyay Sachin Rustgi Rajat kanti Chaudhuri Paramjit khuran Jitendra Paul khurana Akhilesh kumar Tyagi Harindra singh Balyan Andreas Houben pushpendra kumar Gupta Department of Genetics & Plant Breeding Ch. Charan Singh University Meerut 250004 India Department of Biotechnology Birla Institute of Technology Mesra 835215 Ranchi India Department of Crop & Soil Sciences Washington State University Pullman 99163 USA Department of Botany University of Calcutta Kolkata 700019 India Department of Plant Molecular Biology University of Delhi South Campus New Delhi 110021 India Leibniz Institute of Plant Genetics and Crop Plant Research Corrensstrasse-03 Gatersleben 06466 Germany

We investigated the compositional and structural differences in sequences derived from different fractions of wheat genomic DNA obtained using methylation filtration and Cot fractionation. Comparative analysis of these sequences revealed large compositional and structural variations in terms of GC content, different structural elements including repeat sequences （e.g., transposable elements and simple sequence repeats）, protein coding genes, and non-coding RNA genes. A correlation between methylation status [determined on the basis of selective inclusion/ exclusion in methylation-filtered （MF） library] of different repeat elements and expression level was observed. The expression levels were determined by comparing MF sequences with expressed sequence tags （ESTs） available in the public domain. Only a limited overlap among ME high Cot （HC）, and ESTs was observed, suggesting that these sequences may largely either represent the low-copy non-transcribed sequences or include genes with low expression levels. Thus, these results indicated a need to study MF and HC sequences along with ESTs to fully appreciate complexity of wheat gene space.

关键词： Methylation--filtration Cot fractionation Transposable elements Gene-rich regions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-Step One Chemical Synthesis Process of Graphene from Rice Husk for Energy Storage Applications

引用

Graphene 2017年第3期6卷 61-71页

作者： pushpendra singh Jitendra Bahadur kaushik Pal Centre of Nanotechnology Indian Institute of Technology Roorkee India Department of Mechanical and Industrial Engineering Indian Institute of Technology Roorkee India

Few layer graphene was synthesized using rice husk ash (RHA) and potassium hydroxide (kOH). This methodology demonstrates the utility of RHA as carbon source for graphene synthesis and as a protective barrier against oxidation of parent rice husk and kOH mixture. Oxidation may occur during synthesis process due to high temperature annealing of RHA and kOH mixture. Electrochemical characterization showed decent capacitance value 86 F·g-1 at 500 mV·s-1. XRD and Raman spectroscopy analysis confirmed the presence of graphitic structure. Transmission electron microscopy visually confirmed presence of few layer graphene. Novelty of this synthesis technique can be described as one-pot, one chemical synthesis technique. Use of natural precursor makes this technique highly cost effective for large scale production.

关键词： Rice Husk Graphene Silicon Dioxide Cyclic Voltammetry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

QTL analysis for some quantitative traits in bread wheat

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第11期8卷 807-814页

作者： pushpendra kumar Gupta HARINDRA singh Balyan PAWAN Laxminarayan kulwal NEERAJ kumar AJAY kumar REYAZUL Rouf Mir AMITA Mohan JITENDRA kumar Molecular Biology Laboratory Department of Genetics and Plant BreedingChaudhary Charan Singh UniversityMeerut 250 004India

Quantitative trait loci (QTL) analysis was conducted in bread wheat for 14 important traits utilizing data from four different mapping populations involving different approaches of QTL analysis. Analysis for grain protein content (GPC) sug- gested that the major part of genetic variation for this trait is due to environmental interactions. In contrast, pre-harvest sprouting tolerance (PHST) was controlled mainly by main effect QTL (M-QTL) with very little genetic variation due to environmental interactions; a major QTL for PHST was detected on chromosome arm 3AL. For grain weight, one QTL each was detected on chromosome arms 1AS, 2BS and 7AS. QTL for 4 growth related traits taken together detected by different methods ranged from 37 to 40; nine QTL that were detected by single-locus as well as two-locus analyses were all M-QTL. Similarly, single-locus and two-locus QTL analyses for seven yield and yield contributing traits in two populations respectively allowed detection of 25 and 50 QTL by composite interval mapping (CIM), 16 and 25 QTL by multiple-trait composite interval mapping (MCIM) and 38 and 37 QTL by two-locus analyses. These studies should prove useful in QTL cloning and wheat improvement through marker aided selection.

关键词： Quantitative trait loci (QTL) analysis Grain quality traits Grain protein content Pre-harvest sprouting tolerance(PHST) Grain weight Mapping populations Bread wheat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：