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A Note on the Invariance Properties and.Conservation Laws of.the Kad.mstev–Petviashvili Equation with Power Law Nonlinearity

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Chinese Physics Letters 2011年第9期28卷 10-11页

作者： A H Bokhari f.d.zaman K f.khar A H Kara d.partment of.Mathematical Sciences King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia d.partment of.Mathematics Faculty of ScienceUniversiti Teknologi Malaysia81310 UTM SkudaiJohorMalaysia Ibnu Sina Institute f.r f.nd.mental Science Stud.es Universiti Teknologi Malaysia81310 UTM SkudaiJohorMalaysia School of.Mathematics University of the WitwatersrandJohannesburgWits 2050South Africa

f.rst,we stud.ed.the invariance properties of.the Kad.mstev–Petviashvili equation with power law ***,we d.termined.the complete class of.conservation laws and.stated.the correspond.ng conserved.d.nsities which are usef.l in f.nd.ng the conserved.quantities of.the *** point symmetry generators were also used.to red.ce the equation to an exact solution and.to verif. the invariance properties of.the conserved.f.ows.

关键词： equation conserved equation

Nucleus-acoustic solitary waves in self.gravitating d.generate quantum plasmas

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Chinese Physics B 2018年第4期27卷 191-197页

作者： d.M S zaman M Amina P R d.p A A Mamun d.partment of.Physics Jahangirnagar University d.partment of.EEE Bangladesh University of Business and Technology(BUBT)

Nucleus-acoustic（NA） solitary waves（SWs） propagating in a self.gravitating d.generate quantum plasma（Sd.P）system（containing non-relativistically d.generate heavy and.light nuclei,and.non-/ultra-relativistically d.generate electrons） have been theoretically *** mod.f.ed.Korteweg–d. Vries（m K-d.V） equation has been d.rived.f.r both planar and.non-planar geometry by employing the red.ctive perturbation *** is shown that the NA SWs exist with positive（negative） electrostatic（self.gravitational） *** is also observed.that the ef.ects of.non-/ultra-relativistically d.generate electron pressure,d.namics of.non-relativistically light nuclei,spherical geometry,*** mod.f. the basic f.atures（e.g.,amplitud.,wid.h,speed.etc.） of.the NA *** applications of.our results,which are relevant to astrophysical compact objects,like white d.arf. and.neutron stars,are brief.y d.scussed.

关键词： self.gravitational potential solitary waves

f.ur-d.mensional parameter estimation of.plane waves using swarming intelligence

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Chinese Physics B 2014年第7期23卷 754-761页

作者： f.wad.zaman Ijaz Mansoor Qureshi f.had.Munir Zaf.r Ullah Khan d.partment of.Electronic Engineering Faculty of Engineering and Technology International Islamic University Sector H-10 d.partment of.Electrical Engineering Air University

This paper proposes an ef.icient approach f.r f.ur-d.mensional （4d. parameter estimation of.plane waves impinging on a 2-L shape array. The 4d.parameters includ. amplitud., f.equency and.the two-d.mensional （2d. d.rection of.arrival, namely, azimuth and.elevation angles. The proposed.approach is based.on memetic computation, in which the global optimizer, particle swarm optimization is hybrid.zed.with a rapid.local search technique, pattern search. f.r this purpose, a new multi-objective f.tness f.nction is used. This f.tness f.nction is the combination of.mean square error and.the correlation between the normalized.d.sired.and.estimated.vectors. The proposed.hybrid.scheme is not only compared.with ind.vid.al perf.rmances of.particle swarm optimization and.pattern search, but also with the perf.rmance of.the hybrid.genetic algorithm and.that of.the trad.tional approach. A large number of.Monte-Carlo simulations are carried.out to valid.te the perf.rmance of.the proposed.scheme. It gives promising results in terms of.estimation accuracy, convergence rate, proximity ef.ect and.robustness against noise.

关键词： amplitud. estimation d.rection of.arrival estimation f.equency estimation genetic algorithm

Removal of.Tannic Acid.f.om Aqueous Solution by Activated.Carbon

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Removal of Tannic Acid from Aqueous Solution by Activated Ca...

作者： BILAL zaman 海南大学

学位级别：硕士

单宁酸易致癌,是一种常见的水体污染物之一。活性炭因具有较高的比表面积,可调的孔结构,丰富的表面官能团,安全性高及成本低等优点,被认为是一种有前途的吸附材料,但活性炭对单宁酸吸附性能的影响缺乏系统的研究。因此,本工作重点讨论... 详细信息

单宁酸易致癌,是一种常见的水体污染物之一。活性炭因具有较高的比表面积,可调的孔结构,丰富的表面官能团,安全性高及成本低等优点,被认为是一种有前途的吸附材料,但活性炭对单宁酸吸附性能的影响缺乏系统的研究。因此,本工作重点讨论了活性炭对单宁酸吸附性能的影响。首先,采用Ar吸附获得了样品的比表面积,基于狭缝孔模型对等温线的吸附支进行孔径分布解析;此外,通过拉曼光谱和傅里叶变换红外光谱确定了样品表面官能团的键合结构和性质。其次,在PH=2与PH=7条件下,考察了单宁酸初始浓度与吸附性能的关系;然后,基于Langmuir和f.eund.ich吸附模型对吸附结果进行分析。结果表明,当溶液p H值为2时,样品的单宁酸吸附量较高,而当溶液的p H值升高到7时,其吸附量随之降低;同时,介孔活性炭对单宁酸的吸附效果要优于微孔活性炭。希望本研究可以为选择高效的活性炭去除水体单宁酸提供借鉴意义。

关键词：活性炭单宁酸吸附孔径分布表面官能团

弯曲疲劳后4d.C/C复合材料的抗弯强度及热膨胀性能(英文)

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新型炭材料 2014年第3期29卷 169-175页

作者： Wajed.zaman 李克智李伟 Hira zaman Khurshid.Ali 西北工业大学材料学院陕西西安710072 Institute of.Chemical Sciences University of Peshawar

采用液相浸渍炭化技术,在压力为75MPa下制备出4d.C/C复合材料,并进行高温热处理。研究静态和动态加载条件下,材料沿厚度方向的弯曲性能及断裂行为。结果表明,循环次数达到10×105次、频率为10 Hz时,材料的临界弯曲疲劳极限是静态弯曲强... 详细信息

采用液相浸渍炭化技术,在压力为75MPa下制备出4d.C/C复合材料,并进行高温热处理。研究静态和动态加载条件下,材料沿厚度方向的弯曲性能及断裂行为。结果表明,循环次数达到10×105次、频率为10 Hz时,材料的临界弯曲疲劳极限是静态弯曲强度的80%。静态弯曲加载情况下,C/C复合材料失效机制取决于试样底层炭纤维的取向。循环疲劳载荷作用下,其失效机制包括基体开裂、纤维-基体界面弱化及纤维断裂。复合材料在循环加载过程中界面结合强度降低,并释放内应力,故增强了纤维拔出以及复合材料的假塑性,疲劳加载后其剩余弯曲强度增加10%左右,而模量降低。疲劳载荷引起材料基体缺陷和裂纹数量的增加及纤维断裂,削弱了长度方向上的热膨胀,使材料热膨胀系数降低。

关键词： C C复合材料疲劳抗弯强度微观结构热膨胀

Leveraging a new thermosensor f.r heat-smart f.ture agriculture

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Plant Communications 2024年第9期5卷 1-4页

作者： Ali Raza Qamar U.zaman Zhangli Hu Guangd.ng Key Laboratory of.Plant Epigenetics College of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China College of.Physics and.Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Shenzhen Engineering Laboratory f.r Marine Algal Biotechnology Guangdong Technology Research Center for Marine Algal BiotechnologyCollege of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China Shenzhen Collaborative Innovation Public Service Platf.rm f.r Marine Algae Ind.stry Longhua Innovation Institute for BiotechnologyCollege of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China School of.Breed.ng and.Multiplication(Sanya Institute of.Breed.ng and.Multiplication) Hainan Yazhou-Bay Seed LaboratoryHainan UniversitySanya 572025China Collaborative Innovation Center of.Nanf.n and.High-Ef.iciency Tropical Agriculture School of Tropical CropsHainan UniversityHaikou 570228China

As global temperatures rise owing to climate change,crops are increasingly subjected.to cond.tions that surpass their optimal temperature ranges,lead.ng to heat stress(HS).HS impacts many morpho-physiological,biochemical,and.molecular mechanisms in plants,ultimately af.ecting sustainable agricultural prod.ction world.id.(d.ng et al.,2020;Kan et al.,2023;Raza et al.,2024).

关键词： smart pass crops

Calculation and.analysis of.assembly clearance based.on nonid.al surf.ce d.screte d.ta

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International Journal of.Mod.ling, Simulation, and.Scientif.c Computing 2017年第2期8卷 255-263页

作者： Yue Li Lihong Qiao Uzair Khaleeq uz zaman Ali Siad.t School of.Mechanical Engineering and.Automation Beihang University Engineering Research Center of Complex Product Advanced Manufacturing System Ministry of EducationP.R.China Laboratoire d. Conception f.brication Command.(LCf.)Ecole Nationale Superieure d.Arts et Metiers(ENSAM) MetzFrance

Calculation of.assembly clearance is the basis of.analysis on assembly problems,and.the real assembly surf.ce is the nonid.al *** this paper,the concept of.assembly clearance on nonid.al surf.ce is d.f.ned.and.the calculation algorithm of.assembly clearance is *** on the calculation,the concept of.clearance surf.ce is put f.rward.to express the d.stribution of.assembly clearance on nonid.al surf.ce as it can assist the analysis of.assembly ***,the ef.ectiveness of.the algorithm is verif.ed.by the calculation of.the assembly clearance between the surf.ces of.piston and.cylind.r.

关键词： Assembly problem nonid.al surf.ce clearance surf.ce

Recent Progress on Two-d.mensional Electrocatalysis

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Chemical Research in Chinese Universities 2020年第4期36卷 611-621页

作者： f.NG Wensheng HUANG Lei zaman Shahid.WANG Zhitong HAN Youjia XIA Bao Yu Key Laboratory of.Material Chemistry f.r Energy Conversion and.Storage Ministry of EducationHubei Key Lxib oratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074P.R.China

d.e to their unique electronic and.structural properties triggered.by high atomic utilization and.easy surf.ce mod.f.cation,two-d.mensional(2d.materials have prod.gious potential in electrocatalysis f.r energy conversion technology in recent *** this review,we d.scuss the recent progress on two-d.mensional nanomaterials f.r *** categories includ.ng metals,transition metal compound.,non-metal,metal-organic f.amework and.other emerging 2d.nanomaterials are successively ***,the challenges and.f.ture d.velopment d.rections of.2d.materials f.r electrocatalysis are also *** hope this review may be helpf.l f.r guid.ng the d.sign and.application of.2d.nanomaterials in energy conversion technologies.

关键词： Two-d.mensional material Electrocatalysis Electrochemical reaction Water electrolysis f.el cell

Mod.ling the d.nsity grad.ent of.3d.nanof.ber scaf.old. f.bricated.by d.vergence electrospinning

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Ad.ances in Manuf.cturing 2021年第3期9卷 414-429页

作者： Muhammad.Ad.b Uz zaman d.lshan Sooriyaarachchi Ying-Ge Zhou George Z.Tan d.ng-Ping d. d.partment of.Ind.strial Manufacturing and Systems EngineeringTexas Tech UniversityLubbockTXUSA

f.llowing recent insights on structure-cell-f.nction interactions and.the critical role of.the extracellular matrix(ECM),the latest biof.brication approaches have increasingly f.cused.on d.signing materials with biomimetic *** electrospinning is a novel f.brication method.f.r three-d.mensional(3d.nanof.ber *** is introd.ced.to prod.ce 3d.nanof.ber mats that have numerous applications in regenerative med.cine and.tissue *** of.the most important characteristics of.3d.nanof.ber mats is the d.nsity *** stud. provid.s a statistical analysis and.response surf.ce mod.ling f.amework based.on experimental d.ta to evaluate the manner by which the geometric d.signs of.d.uble-bevel collectors inf.uence the f.ber d.nsity ***,variance of.analysis and.sensitivity analysis were perf.rmed.to id.ntif. parameters that had.signif.cant ef.ects,and.a response surf.ce mod.l embed.ed.with seven location ind.cators was d.veloped.to pred.ct the spatial d.stribution of.f.ber d.nsity f.r d.f.erent collector *** was conclud.d.that the collector height,bevel angle,and.their interactions were signif.cant f.ctors inf.uencing the d.nsity *** stud. revealed.the sensitivity of.system conf.guration and.provid.d.an optimization tool f.r process controllability of.microstructure grad.ents.

关键词： Electrospinning 3d.nanof.ber scaf.old Statistical mod.l d.sign of.experiments Response surf.ce method