检索结果-南通市图书馆

Evaluation of load transfer mechanism under axial loads in a novel coupler of dual height rock bolts

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

International Journal of Mining Science and Technology 2021年第2期31卷 225-232页

作者： Ranjan Kumar Prabhat Kumar Mandal Ashish Narayan Arka jyoti Das CSIR-Central Institute of Mining and Fuel Research DhanbadJharkhand 826015India Chaibasa Engineering College KelendeJharkhand 833201India

The effective reinforcement of two or more overlying layers of mine openings in a single installation is usually done by coupling of two standard rock bolts mainly during the extraction of medium-thick coal ***,field observations show that the couplers of multiple bolts often degrade or break mostly at their *** types of failures can be avoided by strengthening the couplers of such multi-bolts *** achieve this,a novel threaded coupler system with an expansion shell was suggested in this *** newly designed coupler consists of a threaded tapered-plug-cumconnector with an expansion shell for connecting and tightening two standard rock *** analytical model for evaluating the load distribution along the coupler subject to axial load was *** analysis was performed to analyse the load transfer,deformation,and strains across the coupler including the factor of safety for the bolt-coupler-resin and bolt-coupler-expansion *** results validated the analytical model of the proposed coupler design,which provides better anchorage near the interface of the host rock ***,the developed coupler design would reduce the failures of the proposed coupler and stabilize laminated roof strata above the medium-thick coal seams in underground mines.

关键词： Roof rock reinforcement Dual height rock bolts Rock bolt coupler Expansion shell Underground mining Laminated roof strata

Laser Direct Metal Deposition Technology and Microstructure and Composition Segregation of Inconel 718 Superalloy

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第4期18卷 73-78页

作者： ZHANG Qun-li YAO Jian-hua jyoti Mazurnder Key Laboratory of E and M of Ministry of Education and Zhejiang Province Hangzhou 310014 Zhejiang China Research Center of Laser Processing Technology and Engineering Zhejiang University of Technology Hangzhou 310014 Zhejiang China Center for Laser Aided Intelligent Manufacturing University of Michigan Ann Arbor 48109 Michigan USA

Multilayer of laser direct metal deposition（DMD）was prepared by depositing a gas atomized pre-alloyed powder with a composition close to Inconel 718 alloy on Inconel 718 high temperature alloy *** effects of the DMD parameters on the build-up rate and the structure of the deposited layer were *** laser DMD sample was further processed by a solution *** microstructure and property of the laser DMD zone before and after heat treatment were investigated as *** results show that the laser parameters of actual laser power of 650 W,scanning speed of 5.8 mm/s,beam diameter of 1 mm,powder feed rate of 6.45 g/min,with a corresponding specific energy of 90-130 J/mm2,can be recommended as optimum parameters for high build-up rate of Inconel 718 *** the condition of optimized parameters,a directional solidification microstructure was obtained and the average distance between the columnar crystals was 5-10 μ*** microcomposition segregation was found between the columnar crystal trunk and columnar *** elements of Nb,Mo,Ti concentrated in the columnar crystal *** the heat treatment,the segregation was greatly minimized,and the segregation ratios were close to *** hardness of the laser deposited layer did not show obvious difference along the height of the layer either for the as-deposited layer or for the heat treated ***,the microhardness of the laser DMD zone after heat treatment was obviously higher than that after the as-deposited *** the heat treatment process,some Nb-and Mo-rich phases precipitated and strengthened DMD layer.

关键词： laser DMD Inconel 718 alloy composition segregation microstructure hardness

Fully-inorganic strontium incorporated CsPbI_(2)Br perovskite solar cells with promoted efficiency and stability

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第11期30卷 451-458,I0010页

作者： jyoti V.Patil Sawanta S.Mali Chang Kook Hong Optoelectronic Convergence Research Center School of Advanced Chemical EngineeringChonnam National UniversityGwangju 61186South Korea Polymer Energy Materials Laboratory School of Advanced Chemical EngineeringChonnam National UniversityGwangju 61186South Korea

In the present investigation, we fabricated strontium (Sr2+) incorporated CsPbI2Br-based inorganic perovskite solar cells in ambient conditions. The morphology, crystallinity, absorption, elemental composition and photoluminescence analysis of the bare CsPbI2Br and CsPb1-xSrxI2Br perovskite thin films were studied systematically to investigate the role of Sr2+ incorporation. It is observed that the surface morphology of the CsPbI2Br perovskite thin film has been improved by partial substitution of Pb2+ by Sr2+ which facilitates photoactive black phase-stabilization and defect passivation. The champion device having CsPb0.98Sr0.02I2Br composition exhibited a power conversion efficiency (PCE) of 16.61% which is much higher than the bare device (13.65%). Furthermore, our CsPb0.98Sr0.02I2Br-based devices maintain > 85% of its initial efficiency over 100 h in ambient conditions.

关键词： All-inorganic perovskites Strontium incorporation Deposition method Phase stability Promoted efficiency

Phase structures and critical behavior of rational non-linear electrodynamics Anti de Sitter black holes in Rastall gravity

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第4期76卷 134-152页

作者： Yassine Sekhmani Dhruba jyoti Gogoi Ratbay Myrzakulov Javlon Rayimbaev Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics Astana 010009Kazakhstan L.N.Gumilyov Eurasian National University Astana 010008Kazakhstan Department of Physics Moran CollegeMoranhatCharaideo 785670AssamIndia Theoretical Physics Division Centre for Atmospheric StudiesDibrugarh UniversityDibrugarh 786004AssamIndia New Uzbekistan University Movarounnahr Str.1Tashkent 100000Uzbekistan University of Tashkent for Applied Sciences Gavhar Str.1Tashkent 100149Uzbekistan National University of Uzbekistan Tashkent 100174Uzbekistan

This research paper presents a black hole solution with a rational nonlinear electrodynamics source within the Rastall gravity *** paper analyzes the thermodynamic properties of the solution in normal phase space and explores its critical *** phase structure is examined using the extended first law of thermodynamics,with the cosmological constantΛserving as pressure *** isotherms exhibit van der Waals behavior at small values of horizon r_(+).The paper also investigates the Gibbs free energy behavior and finds two critical points with two pressures where the re-entrant phase transition occurs and *** also explore the prevalent microstructure of black holes in Ruppeiner geometry,uncovering significant deviations in the nature of particle interactions from conventional ***,the thermodynamic geometry is analyzed using the Ruppeiner formalism,with the normalized Ricci scalar indicating possible point-phase transitions of the heat capacity,and the normalized extrinsic curvature having the same sign as the normalized Ricci *** three-phase transitions of the heat capacity are those that we find for the normalized Ruppeiner ***,there is an absolute correspondence.

关键词： Rastall gravity biack hole Phase structures

Efficacy of epothilones in central nervous system trauma treatment:what has age got to do with it?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第4期16卷 618-620页

作者： Jayden Clark Zhendan Zhu jyoti Chuckowree Tracey Dickson Catherine Blizzard Menzies Institute for Medical Research University of TasmaniaHobartAustralia

Central nervous system injury,specifically traumatic brain and spinal cord injury,can have significant long lasting *** are no comprehensive treatments to combat the injury and sequalae of events that occurring following a central nervous system *** we discuss the potential for the epothilone family of microtubule stabilizing agents to improve outcomes following experimentally induced *** drugs,which are able to cross the blood-brain barrier,may hold great promise for the treatment of central nervous system trauma and the current literature presents the extensive range of beneficial effects these drugs may have following trauma in animal ***,the effect of the epothilones can vary and our most recent contributions to this field indicate that the efficacy of epothilones following traumatic brain injury is dependent upon the age of the ***,we present a case for a greater emphasis to be placed upon age when using an intervention aimed at neural regeneration and highlight the importance of tailoring the therapeutic regime in the clinic to the age of the patient to promote improved patient outcomes.

关键词： aging epothilones glial microtubule stablization neuron neuronal regeneration spinal cord injury traumatic brain injury

Depicting the role of gas–solid interactions on the hydrodynamics of converging pneumatic riser

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第2期35卷 190-195页

作者： Rashmi Dhurandhar Sumit H.Dhawane jyoti Prakash Sarkar Bimal Das Department of Chemical Engineering National Institute of TechnologyDurgapur 713209West BengalIndia Department of Chemical Engineering Maulana Azad National Institute of TechnologyBhopal 462003Madhya PradeshIndia

The understanding of the flow characteristics and effect of gas–solid interactions in pneumatic risers is fundamental to investigate to ensure effective design cost-effective ***,to understand the effect of gas–solid interactions on the hydrodynamics of newly proposed conversing risers,this study mainly focused on predicting pressure drop in the dilute phase pneumatic conveying *** experiments were conducted in a converging riser having a convergence angle of 0.2693°.Various solid particles such as sago,black mustard,and alumina have been considered to study the effect of particle sizes and density on the pressure *** experimental outcomes indicate that the total pressure drop increases with an increase in the solid density and gas mass flow ***,smaller particle sizes are also increased the pressure *** empirical correlation is developed for the prediction of total pressure dropΔPTin converging pneumatic riser via dimensional *** dependent variables such as particle and air density,drag force,acceleration due to gravity,the mass flow rate of air and particle,the diameter of particle and converging riser,the height of converging riser were considered to develop the empirical *** established relationship is tested,and experimental data have been fitted for its *** estimated relative error of less than 0.05 proved the significance of the developed ***,it can be stated that the established relationship is useful in studying the effects of various parameters on the pressure drop across the length of the conversing riser.

关键词： Pneumatic conveying Pressure drop Converging riser Gas-solid dynamics

Emerging role of roots in plant responses to aboveground insect herbivory

在线全文

学校读者我要写书评

暂无评论

Insect Science 2013年第3期20卷 286-296页

作者： Vamsi J. Nalam jyoti Shah Punya Nachappa Department of Biology Indiana University-Purdue University Fort Wayne Indiana Department of Biological Sciences and Center for Plant Lipid Research University of North Texas Denton Texas United States

Plants have evolved complex biochemical mechanisms to counter threats from insect herbivory. Recent research has revealed an important role of roots in plant responses to above ground herbivory （AGH）. The involvement of roots is integral to plant resistance and tolerance mechanisms. Roots not only play an active role in plant defenses by acting as sites for biosynthesis of various toxins and but also contribute to tolerance by storing photoassimilates to enable future regrowth. The interaction of roots with beneficial soil- borne microorganisms also influences the outcome of the interaction between plant and insect herbivores. Shoot-to-root communication signals are critical for plant response to AGH. A better understanding of the role of roots in plant response to AGH is essential in order to develop a comprehensive picture of plant-insect interactions. Here, we summarize the current status of research on the role of roots in plant response to AGH and also discuss possible signals involved in shoot-to-root communication.

关键词： jasmonic acid secondary metabolites shoot-to-root communication soilborne microorganisms

Gedunin attenuates streptozotocin-induced diabetic hepatopathy in rats

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

Asian Pacific Journal of Tropical Biomedicine 2024年第7期14卷 288-297页

作者： Suchismita Mazumdar Thankamani M Marar jyoti M Patki School of Biotechnology and Bioinformatics D.Y.Patil Deemed to be UniversityNavi Mumbai 400614India

Objective:To examine the hepatoprotective effects of gedunin in streptozotocin(STZ)-induced diabetic ***:Rats were divided into 4 groups:control,STZ,gedunin,and STZ+*** parameters for liver function and liver histology were *** molecular interaction of gedunin with the liver glucose transporters GLUT2 and SGLT1 was examined using AutoDock ***:Gedunin attenuated STZ-induced increase in the levels of aspartate transaminase,alanine transaminase,alkaline phosphatase,lactate dehydrogenase and gamma-glutamyl transferase in the serum and liver tissue,reduced lipid peroxidation,and enhanced antioxidant *** studies showed considerable restoration of liver architecture in gedunin-treated diabetic *** silico studies revealed stable binding of gedunin with GLUT2 and ***:Gedunin exerts hepatoprotective effects in STZ-induced diabetic rats by reducing liver enzymatic activities and oxidative *** studies are warranted to verify the mechanism of its hepatoprotective action.

关键词： Gedunin GLUT2 SGLT1 Diabetic hepatopathy Docking Histology Homology modelling

Electron Acceleration by a radially polarised cosh-Gaussian laser beam in vacuum

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

Communications in Theoretical Physics 2021年第9期73卷 124-128页

作者： Jitender Singh jyoti Rajput Harjit Singh Ghotra Niti Kant Department of Physics Lovely Professional UniversityG.T.RoadPhagwara(144411)PunjabIndia Extreme Light Infrastructure-Nuclear Physics(ELI-NP) Horia Hulubei NIPNE30 Reactorului Street077125 MagureleJud.IifovRomania

In this paper,a radially polarised cosh-Gaussian laser beam(CGLB)is used to study the electron acceleration produced in vacuum.A highly energetic electron beam can be achieved by a CGLB,even with comparatively low-powered *** properties of a CGLB cause it to focus earlier,over a shorter duration than a Gaussian laser beam,which makes it suitable for obtaining high energies over small *** is found that the energy gained by the electrons strongly depends upon the decentering parameter of the laser *** is also observed that for a fixed value of energy gain,if the decentering parameter is increased,then the intensity of the laser field *** dependence of the energy gained by electrons on the laser intensity and the laserspot size is also studied.

关键词： cosh-Gaussian laser beam vacuum electron acceleration decentered parameter