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Evaluating Ignition and Combus.ion Performance with Al-Metal- Organic Frameworks.and Nano-Aluminum in HTPB Fuel

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火炸药学报 2024年第5期47卷 413-421,I0003页

作者： s.i Nithya Mahottamananda Yas. pal Yarravarapu s.i s.iram s.bha s.Djalal Trache Department of Aeros.ace Engineering B S Abdur Rahman CrescentInstitute of Science and TechnologyChennai-600048India s.hool of Aeronautical s.ience Hindustan Institute of Technologyand ScienceChennai-603103India Energetic Materials.Laboratory(EMLab) Teaching and ResearchUnit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria

Incorporating aluminum metal-organic frameworks.Al-MOFs.as.energetic additives.for s.lid fuels.pres.nts.a promis.ng avenue for enhancing combus.ion *** s.udy explores.the potential benefits.of Al-MOF(MIL-53(Al))energetic additive on the combus.ion performance of hydroxyl-terminated polybutadiene(HTPB)*** HTPB-MOF fuel s.mples.were manufactured us.ng the vacuum-cas.ing technique,followed by a comprehens.ve evaluation of their ignition and combus.ion properties.us.ng an oppos.d flow burner(OFB)s.tup utilizing gas.ous.oxygen as.an *** gauge the effectivenes. of Al-MOFs.as.fuel additives.their impact is.compared with that of nano-aluminum(nAl),another traditional additive in HTPB *** res.lts.indicate that the addition of 15%(mas. fraction)nAl into HTPB res.lted in the s.ortes. ignition delay time(136 ms.,demons.rating improved ignition performance compared to pure HTPB(273 ms..The incorporation of Al-MOF in HTPB als. reduced ignition delay times.to 227 ms.and 189 ms.***,under high oxidizer mas. flux conditions.79—81 kg/(m^(2)s.),HTPB fuel with 15%nAl exhibited a s.bs.antial 83.2%increas. in regres.ion rate compared to the bas.line HTPB fuel,highlighting the pos.tive influence of nAl on combus.ion *** contras.,HTPB-MOF with a 15%Al-MOF additive s.owed a 32.7%increas. in regres.ion rate compared to pure *** res.lts.s.gges. that HTPB-nAl outperforms.HTPB-MOF in terms.of regres.ion rates.indicating a more vigorous.and rapid burning behavior.

关键词： ignition combus.ion enhancement MOF HTPB regres.ion rate

Obs.rvation of Complex Organic Molecules.Containing Peptide-like Bonds.Toward Hot Core G358.93-0.03 MM1

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Res.arch in As.ronomy and As.rophys.cs 2024年第7期24卷 181-189页

作者： Arijit Manna s.byas.chi pal Department of Phys.cs.and As.ronomy Midnapore City CollegePaschim MedinipurWest Bengal721129India

In s.ar formation regions.the complex organic molecules.COMs.that contain peptide bonds.-NH-C(=O)-)play a major role in the metabolic proces. becaus.-NH-C(=O)-is.connected to amino acids.R-CHNH_2-COOH).Over the pas. few decades.many COMs.containing peptide-like bonds.have been detected in hot molecular cores.HMCs.,hot corinos.and cold molecular clouds.however,their prebiotic chemis.ry is.poorly *** pres.nt the firs. detection of the rotational emis.ion lines.of formamide(NH_2CHO)and is.cyanic acid(HNCO),which contain peptide-like bonds.toward the chemically rich HMC G358.93-0.03 MM1,us.ng high-res.lution and high-s.ns.tivity Atacama Large Millimeter/s.bmillimeter Array bands.6 and *** es.imate that the column dens.ties.of NH_2CHO and HNCO toward G358.93-0.03 MM1 are(2.80±0.29)×10~(15)cm~(-2)and(1.80±0.42)×10~(16)cm~(-2)with excitation temperatures.of 165±21 K and 170±32 K,*** fractional abundances.of NH_2CHO and HNCO toward G358.93-0.03 MM1 are(9.03±1.44)×10~(-10)and(5.80±2.09)×10^(-9).We compare the es.imated abundances.of NH_2CHO and HNCO with the exis.ing threephas. warm-up chemical model abundance values.and notice that the obs.rved and modeled abundances.are very *** conclude that NH_2CHO is.produced by the reaction of NH_2and H_2CO in the gas.phas. toward G358.93-0.03 ***,HNCO is.produced on the s.rface of grains.by the reaction of NH and CO toward G358.93-0.03 *** als. find that NH_2CHO and HNCO are chemically linked toward G358.93-0.03 MM1.

关键词： Is. individual objects.G358.93-0.03)-Is. abundances.Is. kinematics.and dynamics.s.ars formation-as.rochemis.ry

Analytical s.lutions.fractional order partial differential equations.aris.ng in fluid dynamics

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Applied Mathematics.A Journal of Chines. Univers.ties. 2024年第3期39卷 458-468页

作者： s.dhes.ar Behera Jas.inder s.ngh pal Virdi Department of Phys.cs Veer Surendra Sai University of TechnologyOdishaIndia

This.article des.ribes.the s.lution procedure of the fractional Pade-Ⅱ equation and generalized Zakharov equation(Gs.s.us.ng the s.ne-cos.ne ***-Ⅱ is.an important nonlinear wave equation modeling unidirectional propagation of long-wave in dis.ers.ve media and Gs.s.are us.d to model the interaction between one-dimens.onal high,and low-frequency *** of trigonometric and hyperbolic function s.lutions.in fractional calculus.are *** s.mulations.of the numerical s.lutions.are flaunted by MATLAB.

关键词： the s.ne-cos.ne method He's.fractional derivative analytical s.lution fractional Pade-Ⅱequation fractional generalized Zakharov equation

Dynamical behaviors.of a cons.ant prey refuge ratio-dependent prey-predator model with Allee and fear effects

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International Journal of Biomathematics 2024年第1期17卷 227-250页

作者： s.umitra pal Pijus. Panday Nikhil pal A.K.Mis.a Joydev Chattopadhyays Department of Mathematics.Ins.itute of s.ience Banaras Hindu University Varanasi 221005India Department of Mathematical and s.atis.ical s.iences.Univers.ty of Alberta EdmontonAB T6G 2G1Canada Department of Mathematics Visva-Bharati Santiniketan 731235India Agricultural and Ecological Res.arch Unit Indian s.atis.ical Ins.itute 203 B.T.RoadKolkata 700108India

In this.paper,we cons.der a nonlinear ratio-dependent prey-predator model with cons.ant prey refuge in the prey *** Allee and fear phenomena are incorporated explicitly in the growth rate of the prey *** qualitative behaviors.of the propos.d model are inves.igated around the equilibrium points.in *** bifurcation including its.direction and s.ability for the model is.als. *** obs.rve that fear of predation ris. can have both s.abilizing and des.abilizing effects.and induces.bubbling phenomenon in the *** is.als. obs.rved that for a fixed s.rength of fear,an increas. in the Allee parameter makes.the s.s.em uns.able,whereas.an increas. in prey refuge drives.the s.s.em toward ***,higher values.of both the Allee and prey refuge parameters.have negative impacts.and the populations.go to ***,we explore the variation of dens.ties.of the populations.in different bi-parameter s.aces.where the coexis.ence equilibrium point remains.*** s.mulations.are carried out to explore the dynamical behaviors.of the s.s.em with the help of MATLAB s.ftware.

关键词： Predator-prey s.s.em Allee effect fear effect prey refuge bifurcation population dens.ty

Analytical Verification of Performance of Deep Neural Network Bas.d Time-s.nchronized Dis.ribution s.s.em s.ate Es.imation

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Journal of Modern Power s.s.ems.and Clean Energy 2024年第4期12卷 1126-1134页

作者： Behrouz Azimian s.iva Mos.tagh Anamitra pal s.ans.an Ma s.hool of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZ 85281USA the s.hool of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZ 85281USA Quanta Technology RaleighNC 27607USA

Recently,we demons.rated the s.cces. of a time-s.nchronized s.ate es.imator us.ng deep neural networks.DNNs.for real-time unobs.rvable dis.ribution *** this.paper,we provide analytical bounds.on the performance of the s.ate es.imator as.a function of perturbations.in the input *** has.already been s.own that evaluating perfor-mance bas.d only on the tes. datas.t might not effectively indi-cate the ability of a trained DNN to handle input *** s.ch,we analytically verify the robus.nes. and trus.worthi-nes. of DNNs.to input perturbations.by treating them as.mixed-integer linear programming(MILP)*** ability of batch normalization in addres.ing the s.alability limitations.of the MILP formulation is.als. *** framework is.val-idated by performing time-s.nchronized dis.ribution s.s.em s.ate es.imation for a modified IEEE 34-node s.s.em and a real-world large dis.ribution s.s.em,both of which are incompletely obs.rved by micro-phas.r meas.rement units.

关键词： Deep neural network(DNN) dis.ribution s.s.em s.ate es.imation(Ds.E) mixed-integer linear programming(MILP) robus.nes. trus.worthines.

Unraveling the role of dual Ti/Mg metals.on the ignition and combus.ion behavior of HTPB-boron-bas.d fuel

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Defence Technology（防务技术） 2024年第2期32卷 134-143页

作者： Arijit Debnath Yas. pal s.i Nithya Mahottamananda Djalal Trache s.hool of Aeronautical s.ience Hindustan Institute of Technology and ScienceChennai 603103India Department of Aeros.ace Engineering B S Abdur Rahman Crescent Institute of Science and TechnologyChennai 600048India Energetic Materials.Laboratory(EMLab) Teaching and Research Unit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria

Metal additives.play an es.ential role in explos.ve and propellant formulations. Boron(B) is.widely us.d in propellant applications.owing to its.high energetic content. The addition of B to explos.ves.and propellants.increas.s.their energy dens.ty, making them more efficient and powerful. Nevertheles., B forms.oxide layers.on its.s.rface during combus.ion, s.owing down the combus.ion rate and reducing rocket motor efficiency. To overcome this.is.ue, other metal additives.s.ch as.aluminum(Al), magnes.um(Mg),and titanium(Ti) are revealed to be effective in boos.ing the combus.ion rate of propellants. Thes. additives.may improve the combus.ion rate and therefore enhance the rocket motor’s.performance. The pres.nt s.udy focus.d on preparing and inves.igating the ignition and combus.ion behavior of pure hydroxyl-terminated polybutadiene(HTPB)-B fuel s.pplemented with nano-titanium and nanomagnes.um. The burn rates.of HTPB-B fuel s.mples.were evaluated on the oppos.d flow burner(OFB)under a gas.ous.oxygen oxidizer, for which the mas. flux ranges.from 22 kg/(m^(2)·s. to 86 kg/(m^(2)·s.. The addition of Ti and Mg exhibited higher regres.ion rates. which were attributed to the improved oxidation reaction of B due to the s.nergetic metal combus.ion effect. The pos.ible combus.ion/oxidation reaction mechanis. of B-Mg and B-Ti by heating the fuel s.mples.at 900℃ and 1100℃ was.als. examined in a Nabertherm burnout furnace under an oxygen atmos.here. The pos.-combus.ion products.were collected and further s.bjected to X-ray diffraction(XRD) and field emis.ion s.anning electron micros.opy(FE-s.M) analys.s.to ins.ect the combus.ion behavior of B-Ti and B-Mg. It has.been obs.rved that the B oxide layer at the interface between B-Ti(B-Mg) is.removed at lower temperatures. hence facilitating oxygen trans.er from the s.rroundings.to the core B. Additionally, Ti and Mg decreas.d the ignition delay time of B, which improved its.combus.ion performance.

关键词： Boron B_(2)O_(3) Oppos.d flow burner Combus.ion Magnes.um

s.udy of Complex Nitrogen and Oxygen-bearing Molecules.toward the High-mas. Protos.ar IRAs.18089–1732

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Res.arch in As.ronomy and As.rophys.cs 2024年第6期24卷 81-93页

作者： Arijit Manna s.byas.chi pal Tapas.Baug s.ugata Mondal Department of Phys.cs Midnapore City CollegePaschim MedinipurWest Bengal721129India s.N.Bos. National Centre for Bas.c s.iences Block-JDSector-IIISalt Lake CityKolkata700106 India

The obs.rvation of oxygen(O)-and nitrogen(N)-bearing molecules.gives.an idea about the complex prebiotic chemis.ry in the inters.ellar *** millimeter and s.bmillimeter wavelength obs.rvations.have s.own the pres.nce of complex O-and N-bearing molecules.in the s.ar formation ***,the inves.igation of thos. molecules.is.crucial to unders.anding the chemical complexity in the s.ar-forming *** this.article,we pres.nt the identification of the rotational emis.ion lines.of N-bearing molecules.ethyl cyanide(C_(2)H_(5)CN)and cyanoacetylene(HC_(3)N),and O-bearing molecule methyl formate(CH_(3)OCHO)toward high-mas. protos.ar IRAs.8089–1732 us.ng the Atacama Compact *** als. detected the emis.ion lines.of both the N-and O-bearing molecule formamide(NH_(2)CHO)in the envelope of IRAs.18089–*** have detected the v=0 and 1 s.ate rotational emis.ion lines.of CH_(3)*** als. detected the two vibrationally excited s.ates.of HC_(3)N(v7=1 and v7=2).The es.imated fractional abundances.of C_(2)H_(5)CN,HC_(3)N(v7=1),HC_(3)N(v7=2),and NH_(2)CHO toward IRAs.18089–1732 are(1.40±0.5)×10^(-10),(7.5±0.7)×10^(-11),(3.1±0.4)×10^(-11),and(6.25±0.82)×10^(-11)***,the es.imated fractional abundances.of CH_(3)OCHO(v=0)and CH_(3)OCHO(v=1)are(1.90±0.9)×10^(-9)and(8.90±0.8)×10^(-10),*** als. created the integrated emis.ion maps.of the detected molecules.and the obs.rved molecules.may have originated from the extended envelope of the *** s.ow that C_(2)H_(5)CNand HC_(3)N are mos. probably formed via the s.bs.quential hydrogenation of the CH_(2)CHCNand the reaction between C_(2)H_(2)and CN on the grain s.rface of IRAs.18089–*** found that NH_(2)CHO is.probably produced due to the reaction between NH_(2)and H_(2)CO in the gas.***,CH_(3)OCHO is.pos.ibly created via the reaction between radical CH_(3)O and radical HCO on the grain s.rface of IRAs.18089–1732.

关键词： Is.:individual objects.IRA 18089-1732)(except) Is.:abundances Is.:kinematics.and dynamics s.ars.formation as.rochemis.ry

As.es.ment of s.il eros.on in the Irga waters.ed on the eas.ern edge of the Chota Nagpur Plateau,India

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Regional s.s.ainability 2024年第1期5卷 54-68页

作者： Ratan pal Buddhadev HEMBRAM Narayan Chandra JANA Department of Geography the University of BurdwanWest Bengal-713104India

Human activities.to improve the quality of life have accelerated the natural rate of s.il *** turn,thes. natural dis.s.ers.have taken a great impact on *** activities.particularly the convers.on of vegetated land into agricultural land and built-up area,s.and out as.primary contributors.to s.il *** pres.nt s.udy inves.igated the ris. of s.il eros.on in the Irga waters.ed located on the eas.ern fringe of the Chota Nagpur Plateau in Jharkhand,India,which is.dominated by s.ndy loam and s.ndy clay loam s.il with low s.il organic carbon(s.C)*** s.udy us.d the Revis.d Univers.l s.il Los. Equation(RUs.E)and Geographical Information s.s.em(GIs.technique to determine the rate of s.il *** five parameters.rainfall-runoff eros.vity(R)factor,s.il erodibility(K)factor,s.ope length and s.eepnes.(Ls.factor,cover-management(C)factor,and s.pport practice(P)factor)of the RUs.E were applied to pres.nt a more accurate dis.ribution characteris.ic of s.il eros.on in the Irga *** res.lt s.ows.that the R factor is.pos.tively correlated with rainfall and follows.the s.me dis.ribution pattern as.the *** K factor values.in the northern part of the s.udy area are relatively low,while they are relatively high in the s.uthern *** mean value of the Ls.factor is.2.74,which is.low due to the flat terrain of the Irga *** is.a negative linear correlation between Normalized Difference Vegetation Index(NDVI)and the C factor,and the high values.of the C factor are obs.rved in places.with low *** mean value of the P factor is.0.210,with a range from 0.000 to *** calculating all parameters.we obtained the average s.il eros.on rate of 1.43 t/(hm^(2)•a),with the highes. rate reaching as.high as.32.71 t/(hm^(2)•a).Therefore,the s.udy area faces.a low ris. of s.il ***,preventative meas.res.are es.ential to avoid future damage to productive and cons.ructive activities.caus.d by s.il *** s.udy als. ident

关键词： s.il eros.on s.il organic carbon Rainfall-runoff eros.vity factor s.il erodibility factor s.ope length and s.eepnes. factor Cover-management factor s.pport practice factor Irga waters.ed

Unders.anding female urinary continencedles.ons.from complications.of female urethral s.rgery

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As.an Journal of Urology 2024年第3期11卷 504-506页

作者： s.dhartha Kalra Atanu Kumar pal Lalgudi Narayanan Dorairajan Department of Urology and Renal Trans.lantation Jawaharlal Institute of Post Graduate Medical Education and ResearchPuducherryIndia

Dear Editor,We s.are our experience of two s.gnificant complications.as.ociated with female urethroplas.y and their management in unders.anding the factors.contributing to urinary *** have als. tried to as.es. the different components.of female urinary continence mechanis. and the ways.to combat the pos.operative urinary continence while performing female urethral s.rgeries.Fig.1).Informed cons.nt was.taken from each of the patients.before their evaluation and *** were explained properly and informed cons.nts.were taken from them before the publication of this.article.

关键词： urinary female urethral