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| 1 | Characterization of Phases in an As-cast Copper-Manganese-Aluminum Alloy显示文摘Copper-manganese-aluminum (CMA ) 合金, Fe 的包含的小增加, Ni,和 Si,靠着海水展出好力量和显著腐蚀抵抗。合金处于当演员组状况被使用,并且他们的微观结构能显示出宽变化。名字的作文 Cu-14 百分比 Mn-8 百分比 AI-3 百分比 Fe-2 百分比 Ni 的在一个当演员组(CMA ) 介绍的阶段的形态学,晶体学和作文合金被调查用光,电子光、微的探查分析技术。当演员组微观结构由 fcc alpha- 和电子消息传输方式贝它阶段的谷物组成了与一起金属间化合各种各样的形态学猛抛。房间温度微观结构展出了四种不同类型在一谷物内猛抛:“大”的树枝状形状的粒子并且塑造长方体猛抛,它富于 Fe 和 Mn 并且有 fcc 结构,当时“小”的树枝状形状的粒子并且球状猛抛基于 Fe_3AI 并且有 DO_3 结构。这四不同形态学金属间化合猛抛有 thealpha 矩阵的展出分离取向关系。,仅仅包含的很小的长方体塑造了的贝它谷物猛抛,它能仅仅通过传播被解决电子显微镜学。这些猛抛被发现基于 Fe_3AI 并且有 DO_3 结构。 | J.Iqbal F.Hasan F.Ahmad | 2006 | Journal of Materials Science & Technology2006，22，6： | 5 |
| 2 | Thermal shock and fatigue behavior of pressureless sintered Al_(2)O_(3)-SiO_(2)-ZrO_(2) composites显示文摘The thermal shock and fatigue behavior of pressureless sintered Al_(2)O_(3)-SiO_(2)-ZrO_(2)(ASZ)composites was studied.The influence of the thermal shock and fatigue on the strengthening response of ASZ has been investigated by measuring the strength retention and microstructural changes.The magnitude of the flexural strength and fracture of the ASZ has been compared with that of the monolithic Al_(2)O_(3)(A)and Al_(2)O_(3)-SiO_(2)-ZrO_(2)(AZ)composites under the same experimental conditions.Results indicated that the ASZ composites possess the highest resistance against thermal shock and fatigue,in comparison with A and AZ.The improvements were attributed to the enhancement in the fracture toughness of ASZ and the presence of multi-phase reinforcement. | G.MEBRAHITOM ASMELASH O.MAMAT F.AHMAD A.K.PRASADA RAO | 2015 | Journal of Advanced Ceramics2015，4，3： | 4 |
| 3 | Mode-locked 2 μm fiber laser with a multi-walled carbon nanotube as a saturable absorber显示文摘We propose and demonstrate a passively mode-locked fiber laser operating at 1951.8 nm using a commercial thulium-doped fiber(TDF) laser, a homemade double-clad thulium–ytterbium co-doped fiber(TYDF)as the gain media, and a multi-walled carbon nanotube(MWCNT) based saturable absorber(SA). We prepare the MWCNT composite by mixing a homogeneous solution of MWCNTs with a diluted polyvinyl alcohol(PVA) polymer solution and then drying it at room temperature to form a film. The film is placed between two fiber connectors as a SA before it is integrated into a laser ring cavity. The cavity consists of a 2 m long TDF pumped by a 800 nm laser diode and a 15 m long homemade TYDF pumped by a 905 nm multimode laser diode. A stable mode-locking pulse with a repetition rate of 34.6 MHz and a pulse width of 10.79 ps is obtained when the 905 nm multimode pump power reaches 1.8–2.2 W, while the single-mode 800 nm pump power is fixed at 141.5 m W at all times. To the best of our knowledge, this is the first reported mode-locked fiber laser using a MWCNT-based SA. | S.M.Azooz F.Ahmad H.Ahmad S.W.Harun B.A.Hamida S.Khan A.Halder M.C.Paul M.Pal S.K.Bhadra | 2015 | Chinese Optics Letters2015，13，3： | 1 |
| 4 | Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber显示文摘A Q-switched ytterbium-doped fiber laser(YDFL)is proposed and demonstrated using a newly developed multi-walled carbon nanotubes polyethylene oxide(MWCNTs-PEO)film as a passive saturable absorber(SA).The saturable absorber is prepared by mixing the MWCNTs homogeneous solution into a dilute PEO polymer solution before it is left to dry at room temperature to produce thin film.Then the film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity for Q-switching pulse generation.The laser generates a stable pulse operating at wavelength of 1060.2 nm with a threshold pump power of 53.43 mW.The YDFL generates a stable pulse train with repetition rates ranging from7.92 to 24.27 kHz by varying 980-nm pump power from 53.42 to 65.72 mW.At 59.55-mW pump power,the lowest pulse width and the highest pulse energy are obtained at 12.18μs and 143.5 nJ,respectively. | N.Kasim A.H.H.Al-Masoodi F.Ahmad Y.Munajat H.Ahmad S.W.Harun | 2014 | Chinese Optics Letters2014，12，3： | 1 |
| 5 | Q-switched Er-doped fiber laser with low pumping threshold using graphene saturable absorber显示文摘We propose a Q-switched Er-doped fiber laser(EDFL) with a threshold pumping power as low as 7.4 mW, and demonstrate using graphene polyvinyl alcohol(PVA) thin film as a passive saturable absorber(SA). The SA is fabricated from graphene flakes, which is synthesized by electrochemical exfoliation of graphite at room temperature in 1% sodium dodecyl sulfate aqueous solution. The flakes are mixed with PVA solution to produce a thin film, which is then sandwiched between two ferrules to form a SA and integrated in the EDFL ring cavity to generate a stable Q-switched pulse train. The pulse train operates at 1560 nm with a threshold pump power of 7.4 mW. At maximum 1480 nm pump power of 33.0 mW, the EDFL generates an optical pulse train with a repetition rate of 27.0 kHz and pulse width of 3.56 μs. The maximum pulse energy of 39.4 nJ is obtained at a pump power of 14.9 mW. This laser can be used as a simple and low-cost light source for metrology, environmental sensing, and biomedical diagnostics. | R.Z.R.R.Rosdin F.Ahmad N.M.Ali S.W.Harun H.Arof | 2014 | Chinese Optics Letters2014，12，9： | 1 |
| 6 | Exchange Coupling and Magnetic Behavior of SmCo_(5-x)Sn_x Alloys显示文摘Exchange coupling and magnetic properties of SmCo5 alloys containing different amounts of Sn were investigated in sintered magnets.X-ray diffraction analysis revealed the formation of Sm2Co17 and Sm2Co7 phases in SmCo5 matrix.Exchange coupling mechanism was evaluated by switching field distribution,dcdemagnetization and magnetization curves as function of reverse applied field.Energy product of 59.2 kJ/m 3(7.4 MGOe),remanent magnetization to maximum magnetization ratio of 0.97 and remanence coercivity to intrinsic coercivity ratio of 1.75 were achieved for 0.2 at.% Sn. | Hamid Zaigham F.Ahmad Khalid | 2011 | Journal of Materials Science & Technology2011，27，3： | 1 |
| 7 | Regular perturbation solution of Couette flow(non-Newtonian)between two parallel porous plates: a numerical analysis with irreversibility显示文摘The unavailability of wasted energy due to the irreversibility in the process is called the entropy generation.An irreversible process is a process in which the entropy of the system is increased.The second law of thermodynamics is used to define whether the given system is reversible or irreversible.Here,our focus is how to reduce the entropy of the system and maximize the capability of the system.There are many methods for maximizing the capacity of heat transport.The constant pressure gradient or motion of the wall can be used to increase the heat transfer rate and minimize the entropy.The objective of this study is to analyze the heat and mass transfer of an Eyring-Powell fluid in a porous channel.For this,we choose two different fluid models,namely,the plane and generalized Couette flows.The flow is generated in the channel due to a pressure gradient or with the moving of the upper lid.The present analysis shows the effects of the fluid parameters on the velocity,the temperature,the entropy generation,and the Bejan number.The nonlinear boundary value problem of the flow problem is solved with the help of the regular perturbation method.To validate the perturbation solution,a numerical solution is also obtained with the help of the built-in command NDSolve of MATHEMATICA 11.0.The velocity profile shows the shear thickening behavior via first-order Eyring-Powell parameters.It is also observed that the profile of the Bejan number has a decreasing trend against the Brinkman number.Whenηi→0(i=1,2,3),the Eyring-Powell fluid is transformed into a Newtonian fluid. | M.NAZEER M.I.KHAN S.KADRY Yuming CHU F.AHMAD W.ALI M.IRFAN M.SHAHEEN | 2021 | Applied Mathematics and Mechanics(English Edition)2021，42，1： | 1 |
| 8 | A Q-Switched Erbium-Doped Fiber Laser with a Carbon Nanotube Based Saturable Absorber显示文摘We demonstrate a simple,compact and low cost Q-switched erbium-doped fiber laser(EDFL)using single-wall carbon nanotubes(CNTs)as a saturable absorber for possible applications in metrology,sensing,and medical diagnostics.The EDFL operates at around 1560 nm with repetition rates of 16.1 kHz and 6.4 kHz with saturable absorbers SA1 and SA2 at a pump power of 120 mW.The absorbers are constructed by optically driven deposition and normal deposition techniques.It is observed that the optical deposition method produces a Q-switched EDFL with a lower threshold of 70 mW and better Q-switching performance compared to that of the normal deposition method.The EDFL also has pulse energy of 90.3 nJ and pulse width of 11.6μs at 120 mW pump power. | S.W.Harun M.A.Ismail F.Ahmad M.F.Ismail R.M.Nor N.R.Zulkepely H.Ahmad | 2012 | Chinese Physics Letters2012，29，11： | 0 |
| 9 | Self-Starting Harmonic Mode-Locked Thulium-Doped Fiber Laser with Carbon Nanotubes Saturable Absorber显示文摘We report a ring cavity passively harmonic mode-locked thulium-doped fiber laser(TDFL)using a newly devel-oped single-wall carbon nanotube-based saturable absorber.The TDFL generates the 25 th harmonic mode-locked stretched pulse train with a high repetition rate of 213MHz and a pulse duration of 710fs.The laser operates at 1901.6nm with an average power of 1.89mW,which corresponds to the pulse energy of 0.008nJ,at 1552nm pump power of 719mW.The peak-to-background ratio is measured to be 60dB,which indicates the stability of the laser. | S.W.Harun N.Saidin D.I.M.Zen N.M.Ali H.Ahmad F.Ahmad K.Dimyati | 2013 | Chinese Physics Letters2013，30，9： | 0 |
| 10 | Self-starting harmonic mode-locked Tm-Bi co-doped germanate f iber laser with carbon nanotube-based saturable absorber显示文摘We report a ring cavity passively harmonic mode-locked fiber laser using a newly developed thuliumbismuth co-doped fiber(TBF) as a gain medium in conjunction with a carbon nanotube(CNT)-based saturable absorber.The TBF laser generates a third harmonic mode-locked soliton pulse train with a high repetition rate of 50 MHz and a pulse duration of 1.86 ps.The laser operates at 1 901.6 nm with an average power of 6.6 mW,corresponding to a pulse energy of 0.132 nJ,at a 1 552 nm pump power of 723.3 mW. | N.Saidin D.I.M.Zen S.S.A.Damanhuri S.W.Harun H.Ahmad F.Ahmad K.Dimyati A.Halder M.C.Paul M.Pal S.K.Bhadra | 2013 | Chinese Optics Letters2013，11，6： | 0 |
| 11 | Point mutations in the gene encoding IP3 receptor subtype 3 cause impairment in T-cell and B-cell immune responses via dysfunctional Ca2+ mobilization显示文摘In the current issue of this journal,Neumann et al.provide novel insights into the role of inositol-1,4,5-trisphosphate receptor subtype 3(IP3R3)in combined immunodeficiency[1].They show that subjects with heterozygous variants in IP3R3 have dysfunctional Ca2+mobilization from the endoplasmic reticulum and impaired proliferation of T and B cells.These observations demonstrate that adaptive immune cells such as T and B cells are prone to defects in IP3R3-Ca2+signaling.This highlights a new dimension to the function of IP3R3 in adaptive immune cells that was hitherto unknown. | Ahmed Nadeem Sheikh F.Ahmad | 2023 | Cellular & Molecular Immunology2023，20，2： | 0 |
| 12 | A Passively Mode-Locked Erbium-Doped Fiber Laser Based on a Single-Wall Carbon Nanotube Polymer显示文摘We demonstrate a simple,compact and low-cost mode-locked erbium-doped fiber laser(EDFL)using a single-wall carbon nanotube(SWCNT)poly-ethylene oxide(PEO)composite as a passive saturable absorber(SA).The composite with an SWCNT concentration of 18wt%is prepared by mixing the SWCNT homogeneous solution with a diluted PEO polymer solution.A droplet of the polymer composite is applied on the fiber ferrule end,which is then mated to another clean ferrule connector to construct an SA.The SA is then integrated into the laser system to self-start stable mode locking at 1557 nm without employing a polarization controller.The EDFL generates a stable soliton pulse train with a duration of 0.81 ps,repetition rate of 44 MHz and average output power of 92.4μW at a 980 nm pump power of 26.8 mW.The soliton laser starts to lase at a pump power threshold of 14.6 mW. | F.Ahmad S.W.Harun R.M.Nor N.R.Zulkepely H.Ahmad P.Shum | 2013 | Chinese Physics Letters2013，30，5： | 0 |
| 13 | 生物植入用碳纳米管增强混合功能梯度材料的力学性能(英文)显示文摘利用羟基磷灰石(HA)、不锈钢316L(SS316L)和碳纳米管(CNT)制备生物医学植入体用混合功能梯度材料(FGM)。加入SS316L和CNT增强功能梯度材料离散层的HA制成三种不同类型的功能梯度材料。第一种功能梯度材料加入10%~40%(质量分数)的SS316L强化微米HA,浓度梯度为10%。第二种功能梯度材料,在第一种功能梯度材料的基础上加入0.5%(质量分数)的功能化碳纳米管。第三种功能梯度材料在第二种功能梯度材料的基础上加入微米HA和纳米HA(1:1)的混合物。所有类型的功能梯度材料在相似的压缩参数和烧结参数下,进行单轴压缩实验,并采用无压烧结技术进行烧结。结果表明,加入碳纳米管和纳米晶体HA提高了功能梯度材料的致密度。碳纳米管增强的功能梯度材料的硬度和断裂韧性增加,但是微米和纳米晶体HA增强的功能梯度材料的硬度和断裂韧性的增加更明显。 | M.Asif HUSSAIN Adnan MAQBOOL F.Ahmad KHALID Nabi BAKHSH Ali HUSSAIN Jamil Ur RAHMAN Jong Kyu PARK Tae Gone PARK Lee Jae HYUN Myong Ho KIM | 2014 | Transactions of Nonferrous Metals Society of China2014，24，S1： | 0 |
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