检索结果-南通市图书馆

Computational Fluid Dynamics Approach for Predicting Pipeline Response to Various Blast Scenarios: A Numerical Modeling Study

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第9期140卷 2747-2777页

作者： Farman Saifi mohd.javaid Abid Haleem S.M.Anas Department of Mechanical Engineering Jamia Millia Islamia(A Central University)New Delhi110025India Department of Civil Engineering Jamia Millia Islamia(A Central University)New Delhi110025India

Recent industrial explosions globally have intensified the focus in mechanical engineering on designing infras-tructure systems and networks capable of withstanding blast *** centered on high-profile facilities such as embassies and petrochemical plants,this concern now extends to a wider array of infrastructures and *** and scholars increasingly prioritize structural safety against explosions,particularly to prevent disproportionate collapse and damage to nearby *** has further amplified the reliance on oil and gas pipelines,making them vital for urban life and prime targets for terrorist ***,there is a growing imperative for computational engineering solutions to tackle blast loading on pipelines and mitigate associated risks to avert *** this study,an empty pipe model was successfully validated under contact blast conditions using Abaqus software,a powerful tool in mechanical engineering for simulating blast effects on buried *** a Eulerian-Lagrangian computational fluid dynamics approach,the investigation extended to above-surface and below-surface blasts at standoff distances of 25 and 50 *** descriptions in the numerical model relied on Abaqus’default mechanical *** analysis revealed varying pipe performance,with deformation decreasing as explosion-to-pipe distance *** explosion’s location relative to the pipe surface notably influenced deformation levels,a key finding highlighted in the ***,quantitative findings indicated varying ratios of plastic dissipation energy(PDE)for different blast scenarios compared to the contact blast(P0).Specifically,P1(25 mm subsurface blast)and P2(50 mm subsurface blast)showed approximately 24.07%and 14.77%of P0’s PDE,respectively,while P3(25 mm above-surface blast)and P4(50 mm above-surface blast)exhibited lower PDE values,accounting for about 18.08%and 9.67%of P0’s PDE,***

关键词： Blast loading computational fluid dynamics computer modeling pipe networks response prediction structural safety

Blockchain technology applications for Industry 4.0:A literature-based review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Blockchain(Research and Applications) 2021年第4期2卷 1-11页

作者： mohd.javaid Abid Haleem Ravi Pratap Singh Shahbaz Khan Rajiv Suman Department of Mechanical Engineering Jamia Millia IslamiaNew Delhi110025India Department of Industrial and Production Engineering Dr B R Ambedkar National Institute of TechnologyJalandharPunjab144011India Institute of Business Management GLA UniversityMathuraUttar Pradesh281406India Department of Industrial&Production Engineering Govind Ballabh Pant University of Agriculture&TechnologyPantnagarUttarakhand263145India

Industry 4.0 involves innovations with upcoming digital technologies,and blockchain is one of *** can be incorporated to improve security,privacy,and data transparency both for small and large *** 4.0 is a synthesis of the new production methods that allow manufacturers to achieve their target more *** has been conducted on various Industry 4.0 technologies like Artificial Intelligence(AI),Internet of Things(IoT),Big data,and Blockchain,and how they could create significant interruptions in recent *** technologies provide various possibilities in the world of manufacturing and supply *** is a technology that has gained much recognition and can enhance the manufacturing and supply chain *** fields now have fascinating insights into the advantages of *** research articles on“Blockchain”and“Industry 4.0”from Google Scholar,Scopus,and other relevant sources are identified and reviewed for this *** paper discusses the major potential of Blockchain in Industry *** drivers,enablers,and associated capabilities of Blockchain technology for Industry 4.0 are discussed for *** Industry 4.0 spheres/sub-domains for Blockchain technology realisation are also ***,we have identified and studied fourteen significant applications of Blockchain in Industry *** is a range of new developments and hope for immense opportunities that are changing Industry *** technology would work to achieve amplified outcomes and work individually to enhance the process.

关键词： Blockchain Industry 4.0 Information Data storage Manufacturing

3D printing applications for healthcare research and development

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Global Health Journal 2022年第4期6卷 217-226页

作者： mohd.javaid Abid Haleem Ravi Pratap Singh Rajiv Suman Department of Mechanical Engineering Jamia Millia IslamiaNew Delhi 110025India Department of Industrial and Production Engineering Dr B R Ambedkar National Institute of Technology JalandharPunjab 144011India Department of Industrial and Production Engineering G.B.Pant University of Agriculture and Technology PantnagarUttarakhand 263145India

There is a growing demand for customised,biocompatible,and sterilisable components in the medical busi-ness.3D Printing is a disruptive technology for healthcare and provides significant research and development *** 3D printing service gives patients low-cost individualised prostheses,implants,and gadgets,en-abling surgeons to operate more effectively with customised equipment and models;and assisting medical device manufacturers in developing new and faster goods.3D printed tissue pieces can overcome various challenges and may eventually allow medication companies to streamline research and *** the long run,it may also assist in lowering prices and making medicines more accessible and effective for *** is a growing corpus of research on the advantages of employing 3D printed anatomic models in teaching and *** capacity to 3D printing individual anatomical diseases for practical learning is one of the funda-mental contrasts between utilising 3D and regular anatomical models.3D printing is very appealing for producing patient-specific *** literature review-based paper explores the role of 3D printing and 3D bioprinting in *** briefs the need and progressive steps for implementing 3D printing in healthcare and presented various facilities and enablers of 3D printing for the healthcare ***,this paper identifies and discusses the significant applications of 3D printing for healthcare research and development.3D printing services can be deployed to easily construct complex geometries in plastic or metal with good *** results in improved prototypes,lower costs,and lower part processing *** can now physically create with natural materials,previously unattainable with prior *** hospital should have 3D printers in the future,allowing new organs/parts to be developed in-house.

关键词： 3D printing Healthcare Medical Research Development

Phase Noise Quenching in a Four-Level Laser

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第3期27卷 184-187页

作者： javaid Anwar Department of Physics COMSATS Institute of Information Technology Islamabad Pakistan

In the presence of usual transmission losses, it is shown that phase noise in a four-level laser can be reduced below the Schawlow-Townes limit when lasing levels are coupled to a squeezed vacuum reservoir. The squeezed vacuum coupled to the lasing mode modifies the phase diffusion rate and dominates the contribution from transmission losses. It is predicted to obtain phase stability in the system and phase noise vanishes for larger squeezing. Gain of the laser remains positive under these conditions.

关键词： Optics quantum optics and lasers

Understanding the potential applications of Artificial Intelligence in Agriculture Sector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Agrochem

Advanced Agrochem 2023年第1期2卷 15-30页

作者： mohd.javaid Abid Haleem Ibrahim Haleem Khan Rajiv Suman Department of Mechanical Engineering Jamia Millia IslamiaNew DelhiIndia College of Engineering Northeastern UniversityBostonMAUSA Department of Industrial&Production Engineering G.B.Pant University of Agriculture&TechnologyPantnagarUttarakhandIndia

Artificial Intelligence(AI)has been extensively applied in farming *** cultivate healthier crops,manage pests,monitor soil and growing conditions,analyse data for farmers,and enhance other management activities of the food supply chain,the agriculture sector is turning to AI *** makes it challenging for farmers to choose the ideal time to plant *** helps farmers choose the optimum seed for a particular weather *** also offers data on weather ***-powered solutions will help farmers produce more with fewer resources,increase crop quality,and hasten product time to reach the *** aids in understanding soil *** helps farmers by suggesting the nutrients they should apply to increase the quality of the *** can help farmers choose the optimal time to plant their *** equipment can calculate the spacing between seeds and the maximum planting *** AI-powered system known as a health monitoring system provides farmers with information on the health of their crops and the nutrients that need to be given to enhance yield quality and *** study identifies and analyses relevant articles on AI for *** AI,farmers can now access advanced data and analytics tools that will foster better farming,improve efficiencies,and reduce waste in biofuel and food production while minimising the negative environmental *** and Machine Learning(ML)have transformed various industries,and the AI wave has now reached the agriculture *** are developing several technologies to make monitoring farmers'crop and soil health *** imaging and 3D laser scanning are the leading AI-based technologies that can help ensure crop *** AI-powered technologies collect precise data on the health of the crops in greater volume for *** paper studied AI and its need in *** process of AI in Agriculture and some Agriculture parameters monitored by AI are briefed

关键词： Artificial intelligence Application Agriculture Farming Information Machine learning

Progress in twin roll casting of magnesium alloys: A review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2021年第2期9卷 362-391页

作者： Amjad javaid Frank Czerwinski CanmetMATERIALS Natural Resources CanadaHamiltonOntarioL8P 0A5Canada

Twin roll casting was commercialized for a strip production from ferrous and non-ferrous alloys in the 1950 s;however,its application to magnesium has proven difficult and still creates major *** report describes global efforts in expanding manufacturing capabilities of magnesium sheet through twin roll casting path,offering many benefits,including a reduction in number of processing steps and energy *** addition to hardware design,alloy transformation during processing,product microstructure and properties,examples of successful solutions along with present technology and knowledge limitations are discussed.A particular attention is paid to developments at Canmet MATERIALS,having the only in North America pilot scale twin roll casting facility,devoted to *** are described that aim at design of new magnesium alloys,which could take advantage of unique processing conditions during twin roll casting and contribute to the overall progress in magnesium sheet manufacturing.

关键词： Twin roll casting Magnesium alloys Solidification Magnesium sheet

A Novel Action Transformer Network for Hybrid Multimodal Sign Language Recognition

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第1期74卷 523-537页

作者： Sameena javaid Safdar Rizvi Department of Computer Sciences School of Engineering and Applied SciencesBahria UniversityKarachi CampusKarachiPakistan

Sign language fills the communication gap for people with hearing and speaking *** includes both visual modalities,manual gestures consisting of movements of hands,and non-manual gestures incorporating body movements including head,facial expressions,eyes,shoulder shrugging,*** both gestures have been detected;identifying separately may have better accuracy,butmuch communicational information is *** sign language mechanism is needed to detect manual and non-manual gestures to convey the appropriate detailed message to *** novel proposed system contributes as Sign LanguageAction Transformer Network(SLATN),localizing hand,body,and facial gestures in video *** we are expending a Transformer-style structural design as a“base network”to extract features from a spatiotemporal *** impulsively learns to track individual persons and their action context inmultiple ***,a“head network”emphasizes hand movement and facial expression simultaneously,which is often crucial to understanding sign language,using its attention mechanism for creating tight bounding boxes around classified *** model’s work is later compared with the traditional identification methods of activity *** not only works faster but achieves better accuracy as *** achieves overall 82.66%testing accuracy with a very considerable performance of computation with 94.13 Giga-Floating Point Operations per Second(G-FLOPS).Another contribution is a newly created dataset of Pakistan Sign Language forManual and Non-Manual(PkSLMNM)gestures.

关键词： Sign language gesture recognition manual signs non-manual signs action transformer network

Effect of hot rolling on microstructure and properties of the ZEK100 alloy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2019年第1期7卷 27-37页

作者： Amjad javaid Frank Czerwinski CanmetMATERIALS 183 Longwood Road SouthHamiltonOntario L8P 0A5Canada

Attempts to expand manufacturing capabilities of magnesium-based sheet materials are *** as-cast ZEK100(Mg-1.2Zn-0.35Zr-0.17Nd,in wt%)magnesium alloy was subjected to hot rolling at temperatures from 350℃to 450℃using the laboratory 50 ton reversible mill with preheated rolls to manufacture the 1.5-1.7 mm thick *** rolling temperature affected the sheet properties and an increase in the rolling temperature from 250 to 450℃caused reduction of tensile strength from 257 to 228 MPa ac-companied by a reduction in tensile yield stress from 237 to 185 *** the same time,the alloy elongation increased from 17 to 21%.For the same rolling temperature range,the compressive strength reduced from 418 to 351 *** post-rolling annealing at 450℃led to reduction of both tensile and compressive properties with the largest changes corresponding to the rolling temperature of 350°*** correlation between the alloy grain size after rolling and the sheet properties was established where a reduction in grain size was accompanied by an increase of both the tensile/compressive strength and yield *** on Hall-Petch relationship and an average grain size the correlation developed in this study may be used as the prediction model for properties of the hot rolled magnesium *** results are discussed in terms of recent developments in magnesium sheet alloys and the vital role played in this process by rare earth elements.

关键词： Magnesium alloys Hot deformation Microstructure Rare earths Sheet rolling

Phytodiversity and medicinal plant distribution in pasturelands of North Western Himalaya in relation to environmental gradients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2019年第4期16卷 884-897,955-963页

作者： javaid M.DAD Central Institute of Temperate Horticulture

This study aimed at elucidating phytodiversity of pasturelands of North-western Kashmir Himalayan biotic province in relation to various environmental gradients, with added focus on assessing distribution of important threatened medicinal plant taxa across surveyed pasturelands. A total of 16 sites that spanned across a broad altitudinal gradient(2502-4120 m) were selected. Phytosociological data like density, cover, frequency and abundance of vascular flora were collected and processed using gradient analysis. Soil moisture, nitrogen, organic carbon, acidity and electrical conductivity, altitude, degree of slope and human disturbance were recorded from each site. Analysis of species composition showed a total of 293 species of vascular plants, belonging to 192 genera and 64 families recorded from surveyed sites. Rank abundance exhibited that majority of species are locally rare and patchily distributed, with over 60% of species recording frequencies between 0%-20% and none showing frequencies more than 80%. Species richness showed significant variations and ranged from 20(Parihasmaidan) to 114(Nagbarren) for macro and 3.53±2.11(Thajwas) to 8.76± 1.01(Marsar) for micro-scale of measurement. The ShannonWiener(H') and Simpson's diversity(Ds) indices also varied greatly and were recorded highest(H'= 2.76 & Ds= 0.36) for Marsar and lowest(0.87 & 0.62) for Parihasmaidan. The diversity attributes suggested that pasturelands with lower species richness and diversity on macro-scale were not always species poor and less diverse on micro-measurement scale. The life form groupings highlighted the hemicryptophytic character of vegetation and species with highest importance value index were Sibbaldia cuneata(5.71), Rumex nepalensis(2.89), Juniperus wallichiana(2.88), Cynodon dactylon(2.83), Poa annua(2.49) and Sambucus wightiana(2.41). The results of canonical correspondence analysis showed that effect of altitude and anthropogenic disturbance was overriding and among various en

关键词： Anthropogenic disturbance Kashmir Himalaya Medicinal plants Mountain grasslands