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Effect of cooling media on bead geometry,microstructure,and mechanical properties of wire arc additive manufactured IN718 alloy

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Advances in Manufacturing 2024年第1期12卷 124-149页

作者： Parveen kumar satish kumar Sharma Ratnesh kumar Raj Singh Department of Mechanical Engineering Thapar Institute of Engineering and TechnologyPatialaPunjab147004India

This work aims to present and explore thermal management techniques for the wire arc additive manufacturing(WAAM)of IN718 *** heat can be mitigated via air or water *** this study,the material was deposited under four different heat-input conditions with air or water *** air cooling,the layer is deposited in a normal atmospheric air environment,whereas with water cooling,the material is deposited inside a water tank by varying the water *** validate the air and water cooling thermal management techniques,IN718 single-pass and multilayer linear walls were deposited using the bidirectional gas metal arc welding based WAAM setup under four different heat input *** the deposition of single layers,the temperature profiles were recorded,and the geometric and microstructural features were *** multilayer wall structures,the mechanical properties(hardness,tensile strength,and elongation)were determined and assessed using the corresponding microstructural features explored through scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and electron backscatter diffraction(EBSD)*** microstructure observed through SEM analysis in the building direction was found to be nonhomogenous compared with that in the deposition ***,water cooling was found to govern bead characteristics,such as wall width and *** grain size and anisotropy of the mechanical properties also decreased in the water-cooled ***,water cooling is an economical and efficient method to mitigate excessive heat accumulation in WAAM-deposited IN718.

关键词： Air cooling Water cooling IN718 Bead characteristics Microstructure Electron backscatter diffraction(EBSD)

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Vilsmeier Haack Adducts as Effective Reagents for Regioselective Nitration of Aromatic Compounds under Conventional and Non-Conventional Conditions

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International Journal of Organic Chemistry 2011年第4期1卷 250-256页

作者： Kamatala Chinna Rajanna mukka satish kumar Purugula Venkanna Soma Ramgopal Marri Venkateswarlu 不详

Nitration of aromatic Compounds is triggered by Vilsmeier-Haack reagent (DMF/POCl3) or (DMF/SOCl2) in the presence of KNO3 or NaNO2 under conventional and non-conventional conditions. The reactions af- forded corresponding Nitro derivatives in very good yield with high regioselectivity. The results obtained in non-conventional methods (Micro wave irradiation, Grinding, Sonication) are comparable with those ob- tained under conventional conditions, but the reaction times of former conditions are substantially shorter than that of the latter.

关键词： Nitration KNO3 or NaNO2 Vilsmeier-Haack Reagent Microwave Irradiation (MWI) Grinding Sonication

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Ultrasonically Assisted Synthesis of Aromatic Sulfonic Acids under Vilsmeier Haack Conditions in Acetonitrile Medium

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International Journal of Organic Chemistry 2012年第4期2卷 336-340页

作者： Kamatala Chinna Rajanna Purugula Venkanna mukka satish kumar Soma Ram Gopal Department of Chemistry Osmania University Hyderabad India

Sulfonation of aromatic compounds (Phenols, Anilines) is triggered by Vilsmeier Haack (VH) reagent (DMF/POCl3) or (DMF/SOCl2) in the presence of NaHSO3 under Sonication and conventional stirred conditions at room temperature. The reactions afforded corresponding Sulfonic acid derivatives in very good yields. The results obtained under Sonication were enhanced when compared with the yields of the conventional method.

关键词： Vilsmeier Haack (VH) Reagent Sulfonation NaHSO3 Sonication Aromatic Compounds

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Environmentally Benign Synthetic Protocol for O-Alkylation of <i>β</i>-Naphthols and Hydroxy Pyridines in Aqueous Micellar Media

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Green and Sustainable Chemistry 2012年第4期2卷 123-132页

作者： Kancharla Rajendar Reddy Kamatala Chinna Rajanna Soma Ramgopal mukka satish kumar Sariah Sana Department of Chemistry Osmania University Hyderabad India

Ultrasonic and microwave-assisted practical methods have been developed for the O-alkylation of aryl (β-naphthols) and Heteroaryl (hydroxy pyridines) in aqueous surfactant media in good to excellent yields. The developed methods are simple, efficient, economical and environmentally safe. Our novel methods describe a set of green methods to Wil-liamson synthesis.

关键词： Ultrasonically Assisted Microwave Assisted Green Chemistry Micelles β-Naphthols Heteroaryl Hydroxy Compounds Alcohols

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Genomic selection of eight fruit traits in pear

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Horticultural Plant Journal 2024年第2期10卷 318-326页

作者： Manyi Sun Mingyue Zhang satish kumar Mengfan Qin Yueyuan Liu Runze Wang Kaijie Qi Shaoling Zhang Wenjing Chang Jiaming Li Jun Wu College of Horticulture State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjingJiangsu 210095China State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China The New Zealand Institute for Plant and Food Research Limited Private Bag 1401Havelock North 4157New Zealand Zhongshan Biological Breeding Laboratory NanjingJiangsu 210014China

Genomic selection (GS) has the potential to improve selection efficiency and shorten the breeding cycle in fruit tree breeding. In this study,we evaluated the effect of prediction methods, marker density and the training population (TP) size on pear GS for improving its performance and reducing cost. We evaluated GS under two scenarios:(1) five-fold cross-validation in an interspecific pear family;(2) independent validation. Based on the cross-validation scheme, the prediction accuracy (PA) of eight fruit traits varied between 0.33 (fruit core vertical diameter)and 0.65 (stone cell content). Except for single fruit weight, a slightly better prediction accuracy (PA) was observed for the five parametrical methods compared with the two non-parametrical methods. In our TP of 310 individuals, 2 000 single nucleotide polymorphism (SNP) markers were sufficient to make reasonably accurate predictions. PAs for different traits increased by 18.21%-46.98%when the TP size increased from 50to 100, but the increment was smaller (-4.13%-33.91%) when the TP size increased from 200 to 250. For independent validation, the PAs ranged from 0.11 to 0.45 using rrBLUP method. In summary, our results showed that the TP size and SNP numbers had a greater impact on the PA than prediction methods. Furthermore, relatedness among the training and validation sets, and the complexity of traits should be considered when designing a TP to predict the test panel.

关键词： Pear Pyrus Prediction method TP size SNP marker number

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Systematic Review on Critical Factors and Their Optimization for Solar Cell Performance Enhancement

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Journal of Harbin Institute of Technology(New Series) 2024年第4期31卷 85-98页

作者： Nidhi Shukla satish kumar Department of Physics Mansarovar Global UniversitySehore 466001India

Solar cells and other renewable energy sources are crucial in today's world where sustainability and environmental consciousness is at *** of this,creating the optimal capacity is a fair aim for the operators of such *** transformation of solar energy into either electricity by means of photovoltaics or into useable fuel by means of photo electrochemical cells remained a primary objective for research organizations and development *** this piece,we will take a look back at the history of solar cells and examine their progression through the *** significant aspects which have an impact on the solar cells' performance are also *** article provides a comprehensive and in-depth overview of the important aspects that affect the solar cells' performance,as well as a discussion of the application of bio-inspired optimization algorithms to improve the parameters of solar *** critical factors and their optimization for solar cell performance enhancement is *** helps identify key performance factors,understand limitations,and challenges,and identify effective optimization *** evaluating trade-offs and synergies,it guides future research and informs industrial applications,leading to more efficient and sustainable solar cell technologies.

关键词： solar energy photovoltaic cells temperature irradiance design optimization

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Rate Enhancements in the Acetylation and Benzoylation of Certain Aromatic Compounds with Vilsmeier-Haack Reagents Using Acetamide, Benzamide and Oxychlorides under Non-Conventional Conditions

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International Journal of Organic Chemistry 2011年第4期1卷 233-241页

作者： Marri Venkateswarlu Kamatala Chinna Rajanna mukka satish kumar Utkoor Umesh kumar Soma Ramgopal Pondichery Kuppuswamy Saiprakash 不详

Acetylation and benzoylation reactions of certain aromatic aldehydes, ketones with Vilsmeier-Haack Re- agents using Acetamide and Oxychloride (SOCl2 or POCl3) under conventional (thermal) and non conven- tional [microwave irradiated (MIR), ultrasonic assisted and solvent free mortar pestle (grinding)] conditions. Reactions afforded good to excellent yields of products with both the VH reagents, reaction times were fairly less in the case of [amide/POCl3] than those of [amide/SOCl2] reagent. Reactions are dramatically acceler- ated in under sonicated and microwave irradiations with a trend: MIR (few seconds) >> Sonication (minutes) > Grinding (min) >> thermal (several hrs).

关键词： Acetylation Benzoylation Vilsmeier-Haack Reagent (VHR) Acetamide Benzamide Micro Wave Irradiation Grinding Sonication

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Ultrasonically Assisted Regioselective Nitration of Aromatic Compounds in Presence of Certain Group V and VI Metal Salts

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Green and Sustainable Chemistry 2012年第3期2卷 97-111页

作者： Sariah Sana Kamatala Chinna Rajanna Kancharla Rajendar Reddy Muddam Bhooshan Marri Venkateswarlu mukka satish kumar Kusampally Uppalaiah Department of Chemistry Osmania University Hyderabad India

Ultrasonically assisted nitration reactions (USANR) with anilides, moderately activated and non-activated aromatic compounds underwent smoothly and afforded good yields of products with high regio selectivity. Observed longer reaction times (6 - 8 hrs.) in metal catalyzed reactions reduced to (1 - 2 hrs.) under sonication. When ortho position is blocked para derivatives are obtained, and ortho nitro products are obtained when para position is blocked. In case of USANR of aromatic carbonyl and related compounds the effect of sonication is much more effective. The reactions could be completed only in few minutes.

关键词： Ultrasonically Assisted Regioselective Nitration Group V and VI Metal Salts Reduction in Reaction Times

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Jensen-Renyi’s-Tsallis Fuzzy Divergence Information Measure with its Applications

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Communications in Mathematics and Statistics 2022年第3期10卷 451-482页

作者： Ratika Kadian satish kumar Department of Mathematics Maharishi Markandeshwar(Deemed to be)UniversityMullana-Ambala 133207India

In this paper,we have characterized the sum of two general measures associated with two distributions with discrete random *** of these measures is logarithmic,while others contains the power of variables,named as joint representation of Renyi’s-Tsallis divergence ***,we propose a divergence measure based on Jensen-Renyi’s-Tsallis entropy which is known as a Jensen-Renyi’s-Tsallis divergence *** is a generalization of J-divergence information *** of the silent features of this measure is that we can allot the equal weight to each probability *** makes it specifically reasonable for the study of decision problems,where the weights could be the prior ***,the idea has been generalized from probabilistic to fuzzy similarity/dissimilarity *** the validation of the proposed measure,some of its key properties are also ***,the performance of the proposed measure is contrasted with some existing *** last,some illustrative examples are solved in the context of clustering analysis,financial diagnosis and pattern recognition which demonstrate the practicality and adequacy of the proposed measure between two fuzzy sets(FSs).

关键词： Fuzzy sets Divergence measure Similarity measure Clustering analysis Financial diagnosis

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Survey on recent advances in IoT application layer protocols and machine learning scope for research directions

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Digital Communications and Networks 2022年第5期8卷 727-744页

作者： Praveen kumar Donta satish Narayana Srirama Tarachand Amgoth Chandra Sekhara Rao Annavarapu Department of Computer Science and Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad826004India School of Computer and Information Sciences University of HyderabadHyderabad500046India Mobile&Cloud Lab Institute of Computer ScienceFaculty of Science and TechnologyUniversity of Tartu50090Estonia

The Internet of Things(IoT)has been growing over the past few years due to its flexibility and ease of use in real-time *** IoT's foremost task is ensuring that there is proper communication among different types of applications and devices,and that the application layer protocols fulfill this ***,as the number of applications grows,it is necessary to modify or enhance the application layer protocols according to specific IoT applications,allowing specific issues to be addressed,such as dynamic adaption to network conditions and ***,several IoT application layer protocols have been enhanced and modified according to application ***,no existing survey articles focus on these *** this article,we survey traditional and recent advances in IoT application layer protocols,as well as relevant real-time applications and their adapted application layer protocols for improving *** changing the nature of protocols for each application is unrealistic,machine learning offers means of making protocols intelligent and is able to adapt *** this context,we focus on providing open challenges to drive IoT application layer protocols in such a direction.

关键词： Internet of things Machine learning Application layer Request-response protocols Publish-subscribe protocols

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