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International Journal of Minerals,Metallurgy and Materials 2016年第7期23卷 751-759页

作者： Dilip Makhija rajendra kumar rath Kaushik Chakravarty Abhay Shankar Patra Asim kumar Mukherjee Akhilesh kumar Dubey Research and Development Division Tata Steel Ltd. Mineral Processing Division CSIR-National Metallurgical Laboratory Raw Material Blending and Bedding Section Tata Steel Ltd.

The Linz-Donawitz（LD） steelmaking process produces LD slag at a rate of about 125 kg/t. After metallic scrap recovery, the non-metallic LD slag is rejected because its physical/chemical properties are unsuitable for recycling. X-ray diffraction（XRD） studies have indicated that non-metallic LD slag contains a substantial quantity of mineral phases such as di- and tricalcium silicates. The availability of these mineral phases indicates that LD slag can be recycled by iron（Fe）-ore sintering. However, the presence of 1.2wt% phosphorus（P） in the slag renders the material unsuitable for sintering operations. Electron probe microscopic analysis（EPMA） studies indicated concentration of phosphorus in dicalcium silicate phase as calcium phosphate. The Fe-bearing phases（i.e., wustite and dicalcium ferrite） showed comparatively lower concentrations of P compared with other phases in the slag. Attempts were made to lower the P content of LD slag by adopting various beneficiation techniques. Dry high-intensity magnetic separation and jigging were performed on as-received samples with particle sizes of 6 and 3 mm. Spiral separation was conducted using samples ground to sizes of less than 1 and 0.5 mm. Among these studies, grinding to 0.5 mm followed by spiral concentration demonstrated the best results, yielding a concentrate with about 0.75wt% P and 45wt% Fe.

关键词： steelmaking slag dephosphorization recycling

A Comparative Study on Processing of High Alumina Hematite Iron Ore by Gravity, Magnetic and Flotation Methods

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材料科学与工程（中英文A版） 2013年第5期3卷 349-354页

作者： rajendra kumar rath Sunati Mohanty Bibhuranjan Nayak Ratnakar Singh Kalyan kumar Bhattacharyya Mineral Processing Division CSIR-National Metallurgical Laboratory Council of Scientific and Industrial Research Burma MinesJamshedpur 831007 India

Punjabi DeConverter for generating Punjabi from Universal Networking Language

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第3期14卷 179-196页

作者： Parteek kumar rajendra kumar SHARMA Department of Computer Science & Engineering Thapar University School of Mathematics & Computer Applications Thapar University

DeConverter is core software in a Universal Networking Language(UNL) system.A UNL system has EnConverter and DeConverter as its two major *** is used to convert a natural language sentence into an equivalent UNL expression,and DeConverter is used to generate a natural language sentence from an input UNL *** paper presents design and development of a Punjabi *** describes five phases of the proposed Punjabi DeConverter,i.e.,UNL parser,lexeme selection,morphology generation,function word insertion,and syntactic *** paper also illustrates all these phases of the Punjabi DeConverter with a special focus on syntactic linearization issues of the Punjabi *** linearization is the process of defining arrangements of words in generated *** algorithms and pseudocodes for implementation of syntactic linearization of a simple UNL graph,a UNL graph with scope nodes and a node having un-traversed parents or multiple parents in a UNL graph have been discussed in this *** cases of syntactic linearization with respect to Punjabi language for UNL relations like 'and','or','fmt','cnt',and 'seq' have also been presented in this *** paper also provides implementation results of the proposed Punjabi *** DeConverter has been tested on 1000 UNL expressions by considering a Spanish UNL language server and agricultural domain threads developed by Indian Institute of Technology(IIT),Bombay,India,as *** proposed system generates 89.0% grammatically correct sentences,92.0% faithful sentences to the original sentences,and has a fluency score of 3.61 and an adequacy score of 3.70 on a 4-point *** system is also able to achieve a bilingual evaluation understudy(BLEU) score of 0.72.

关键词： DeConverter EnConverter Machine translation Universal Networking Language(UNL) Syntactic linearization

Experimental investigation and optimization of weld bead characteristics during submerged arc welding of AISI 1023 steel

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Defence Technology（防务技术） 2019年第1期15卷 72-82页

作者： Ankush Choudhary Manoj kumar Deepak rajendra Unune Department of Mechanical-Mechatronics Engineering The LNM Institute of Information Technology

Submerged arc welding(SAW), owing to its high deposition rate and high welding quality, is widely used in the fabrication of pressure vessel, marine vessel, pipelines and offshore structures. However, selection of an optimum combination of welding parameters is critical in achieving high weld quality and productivity. In this work, initially, the SAW experiments were performed using fractional factorial design to analyze the effect of direct and indirect input parameters, namely, welding voltage, wire feed rate,welding speed, nozzle to plate distance, flux condition, and plate thickness on weld bead geometrical responses viz. bead width, reinforcement, and penetration. The bead on plate technique was used to deposit weld metal on AISI 1023 steel plates. The effect of SAW input parameters on response variables were analyzed using main and interaction effects. The linear regression was used to develop the mathematical models for the response variable. Then, the multi-objective optimization of input parameters was carried out using desirability approach, genetic algorithm and Jaya algorithm. The Jaya algorithm offered better optimization results as compared to desirability approach, genetic algorithm.

关键词： Submerged arc welding Optimization Regression Genetic algorithm Jaya algorithm

Underground mining of thick coal seams

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International Journal of Mining Science and Technology 2015年第6期25卷 885-896页

作者： kumar Rakesh Singh Arun kumar Mishra Arvind kumar Singh rajendra Central Institute of Mining and Fuel Research (CIMFR under CSIR) Indian School of Mines (ISM)

This paper reviews underground mining methods for total thickness of a thick coal seam in single lift （TI＇rCSSL）. Review shows the required engineering for extraction of thick seams needs to be fitted with thickness of the seam, behavior of rock-mass and surrounding stress conditions for efficient mining. Variants of TI＇rCSSL are able to extract a maximum 10-12 m thickness only. An improvement in bending moment of the overlying coal band in longwall top coal caving （LTCC） provides better under-winning opportunity for the roof coal band. An acceptable limit of 25 MPa compressive strength of coal for the success of LTCC may be increased under favorable geo-technical conditions. Bord and pillar in India adopted induced caving of roof coal band for single lift depillaring of total thickness （SLDTr） of a compe- tent thick coal seam developed along floor. Case studies are given to arrest the adverse effects of extrac- tion height on pillars.

关键词： Thick coal seamSingle lift depillaring of total thicknessCSmIT)Extraction heightPillar instabilityCaving of coal

Migration of the distal ventriculoperitoneal shunt catheter into the stomach with or without trans-oral extrusion:A systematic literature review and meta-analysis

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World Journal of Clinical Pediatrics 2023年第5期12卷 331-349页

作者： rajendra kumar Ghritlaharey Department of Paediatric Surgery Gandhi Medical College and AssociatedKamla Nehru and Hamidia HospitalsBhopal 462001Madhya PradeshIndia

BACKGROUND Intra-gastric migration of the distal ventriculoperitoneal shunt(VPS)catheter clinically presenting with or without trans-oral extrusion is one of the rare complications of VPS catheter *** To identify the demographics,clinical presentation,clinical findings,and results of surgical therapy offered for the treatment of intra-gastric migration of the distal VPS catheter,clinically presented with or without trans-oral *** An online search was performed for the extraction/retrieval of the published/available literature pertaining to the above-mentioned VPS *** were searched from PubMed,PMC(PubMed Central),ResearchGate,and Google Scholar databases using various terminology relating to the VPS *** first case of migration of a VPS catheter into the stomach was reported in the year 1980,and the data were retrieved from 1980 to December *** were categorized into two groups;Group A:Cases who had migration of the distal VPS catheter into the stomach and clinically presented with trans-oral extrusion of the same,and Group B:Cases who had migration of the distal VPS catheter into the stomach,but presented without trans-oral *** A total of n=46 cases(n=27;58.69%male,and n=19;41.3%females)were recruited for the systematic *** A included n=32,and Group B n=14 *** hydrocephalus was the indication for the primary VPS insertion for approximately half of the(n=22)*** sixty percent(n=27)of them were children≤5 years of age at the time of the diagnosis of the complication mentioned *** seventy-two percent(n=33)cases,this complication was detected within 24 mo after the VPS insertion/last shunt *** diagnosis was evident for the entire group A *** diagnostic modalities were used to confirm the diagnosis for Group B *** surgical procedures were offered for the management of the complication in n=43 cases of both *** two

关键词： Complication Extrusion Hydrocephalus Migration Protrusion Stomach Shunt revision Ventriculoperitoneal shunt Ventriculoperitoneal shunt complications

Treatment of wheat straw using tannase and white-rot fungus to improve feed utilization by ruminants

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Journal of Animal Science and Biotechnology 2014年第2期5卷 222-229页

作者： Shailendra Raghuwanshi Swati Misra rajendra kumar Saxena Department of Microbiology University of Delhi South CampusBenito Juarez Road New Delhi 110 021India

Background： Current research to enrich cattle feed has primarily focused on treatment using white rot fungi, while there are scarce reports using the enzyme tannase, which is discussed only in reviews or in the form of a hypothesis. In this context, the aim of the present study was to evaluate the effect of tannase on wheat straw （WS） and also the effect of lyophilized tannase at concentrations of 0.1%, 0.2%, and 0.3% （w/w） on WS followed by fermentation with Ganodermo sp. for 10 d and compared in relation to biochemical parameters, crude protein （CP） content, and nutritional value by calculating the C/N ratio in order to improve the nutritional value of cattle feed. Results： Penicillium charlesii, a tannase-producing microorganism, produced 61.4 IU/mL of tannase in 54 h when 2% （w/v） tannic acid （TA） was initially used as a substrate in medium containing （% w/v） sucrose （1.0）, NaNO3 （1.0）, and MgSO4 （0.08 pH, 5.0） in a 300-L fermentor （working volume 220 L）, and concomitantly fed with 1.0% （w/v） TA after 24 h. The yield of partially purified and lyophilized tannase was 5.8 IU/mg. The tannin-free myco-straw at 0.1% （w/w） tannase showed 37.8% （w/w） lignin degradation with only a 20.4% （w/w） decrease in cellulose content and the in vitro feed digestibility was 32.2%. An increase in CP content （up to 1.28-fold） along with a lower C/N ratio of 25.0%, as compared to myco-straw, was obtained. Conclusions： The use of tannin-free myco-straw has potential to improve the nutritional content of cattle feed. This biological treatment process was safe, eco-friendly, easy to perform, and was less expensive as compared to other treatment methods.

关键词： Ganoderma sp High energy cattle feed Tannase Tannin free myco-straw

A detailed study on trust management techniques for security and privacy in IoT:challenges,trends,and research directions

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High-Confidence Computing 2023年第2期3卷 71-82页

作者： Himani Tyagi rajendra kumar Santosh Kr Pandey Department of Computer Science Jamia Millia IslamiaNew Delhi 110025India Department of EC&IT MeityNew Delhi 110003India

The Internet of Things is a modern technology that is directed at easing human life by automating most of the things used in daily *** never-ending dependency on the network for communication is attracting adversaries to exploit the vulnerabilities of ***,this technology is facing some serious issues and challenges concerning security and *** issues and challenges are the real motivation behind considering this ***,this survey includes a discussion about security and privacy challenges as well as available solutions for IoT based wireless sensor *** systematic literature review(SLR)focuses particularly on a popular and applicable security approach known as Trust Management System(TMS).Firstly,all aspects of trust management,including trust indicators,trust properties,trust evaluation,trust building,trust models and the importance of those models for security and privacy,trust prediction methodologies,and ultimately trust-based attacks,are covered in this ***,trust management schemes are classified into four groups based on the methodology used for trust-based security solutions in the IoT:cryptography-based,computational and probabilistic-based,information theory-based,and ***,an understanding of the problems and difficulties with current methodologies is given,along with suggestions for further ***,the SLR is concluded by formulating the desirable characteristics of a trust management system in the IoT and proposing a trust model suitable for IoT networks.

关键词： Trust Trust management approaches IoT Security Privacy Reliability Attacks Trust attributes Systematic literature review Cybersecurity

Genetic Relationship and Structure Analysis of Root Growth Angle for Improvement of Drought Avoidance in Early and Mid-Early Maturing Rice Genotypes

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Rice science 2020年第2期27卷 124-132页

作者： Elssa PANDIT rajendra kumar PANDA Auromeera SAHOO Dipti Ranjan PANI Sharat kumar PRADHAN Crop Improvement Division ICAR-National Rice Research InstituteCuttackOdisha 753006India Orissa University of Agriculture&Technology Bhubaneswar 751003India ICAR-National Bureau of Plant Genetic Resource Base Center National Rice Research InstituteCuttackOdisha 753006India

Deeper rooting 1(Dro1)and Deeper rooting 2(Dro2)are the QTLs that contribute considerably to root growth angle assisting in deeper rooting of rice *** the present study,a set of 348 genotypes were shortlisted from rice germplasm based on root angle *** results of the germplasm lines under drought stress identified 25 drought tolerant donor lines based on leaf rolling,leaf drying,spikelet fertility and single plant yield.A panel containing 101 genotypes was constituted based on screening results and genotyped using Dro1 and Dro2 *** software categorized the genotypes into four sub-populations with different fixation index values for root growth *** clustering analysis and principal coordinate analysis could differentiate the genotypes with or without deeper rooting *** dendrogram constructed based on the molecular screening for deep rooting QTLs showed clear distinction between the rainfed upland cultivars and irrigated *** genotypes,namely Dular,Tepiboro,Surjamukhi,Bamawpyan,N22,Dinorado,Karni,Kusuma,Bowdel,Lalsankari and Laxmikajal,possessed both the QTLs,whereas 67 genotypes possessed only *** average angle of Dro positive genotypes ranged from 82.7°to 89.7°.These genotypes possessing the deeper rooting QTLs can be taken as donor lines to be used in marker-assisted breeding programs.

关键词： root growth angle Dro1 Dro2 deeper rooting upland rice drought avoidance

FDTD technique based crosstalk analysis of bundled SWCNT interconnects

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Journal of Semiconductors 2015年第5期36卷 90-98页

作者： Yograj Singh Duksh Brajesh kumar Kaushik rajendra P.Agarwal Department of Electronics and Instrumentation Engineering Mahatma Jyotiba Phule Rohilkhand University Department of Electronics and Communication Engineering Indian Institute of Technology Shobhit University

The equivalent electrical circuit model of a bundled single-walled carbon nanotube based distributed RLC interconnects is employed for the crosstalk analysis. The accurate time domain analysis and crosstalk effect in the VLSI interconnect has emerged as an essential design criteria. This paper presents a brief description of the numerical method based finite difference time domain （FDTD） technique that is intended for estimation of voltages and currents on coupled transmission lines. For the FDTD implementation, the stability of the proposed model is strictly restricted by the Courant condition. This method is used for the estimation of crosstalk induced propagation delay and peak voltage in lossy RLC interconnects. Both functional and dynamic crosstalk effects are analyzed in the coupled transmission line. The effect of line resistance on crosstalk induced delay, and peak voltage under dynamic and functional crosstalk is also evaluated. The FDTD analysis and the SPICE simulations are carried out at 32 nm technology node for the global interconnects. It is observed that the analytical results obtained using the FDTD technique are in good agreement with the SPICE simulation results. The crosstalk induced delay, propagation delay, and peak voltage obtained using the FDTD technique shows average errors of 4.9%, 3.4% and 0.46%, respectively, in comparison to SPICE.

关键词： FDTD SWCNT bundle interconnects crosstalk delay peak voltage coupled transmission lines