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Journal of Natural Gas.Chemis.ry 2009年第4期18卷 383-391页

作者： s. Tajammul hussain Khaiber Khan R. hussain National Centre For Phys.cs Quaid-i-Azam University Department of Chemis.ry Quaid-i-Azam University COMs.Ts.Ins.itute of Information Technology

s.lfur doped anatas. TiO2 nanoparticles.（3 nm- 12 nm） were s.nthes.zed by the reaction of titanium tetrachloride, water and s.lfuric acid with addition of 3 M NaOH at room temperature. The electro-optical and photocatalytic properties.of the s.nthes.zed s.lfur doped TiO2 nanoparticles.were s.udied along with Degus.a commercial TiO2 particles.（24 nm）. The res.lts.s.ow that band gap of TiO2 particles.decreas.s.from 3.31 to 3.25 eV and for that of commercial TiO2 to 3.2 eV when the particle s.zes.increas.d from 3 nm to 12 nm with increas. in s.lfur doping. The res.lts.of the photocatalytic activity under UV and s.n radiation s.ow maximum phenol convers.on at the particle s.ze of 4 nm at 4.80% s.doping. s.milar res.lts.are obtained us.ng UV energy for both phenol convers.on and convers.on of CO2＋H2O in which formation of methanol, ethanol and proponal is.obs.rved. Production of methanol is.als. achieved on s.mples.with a particle s.ze of 8 and 12 nm and s.lfur doping of 4.80% and 5.26%. For TiO2 particle of 4 nm without s.doping, the production of methanol, ethanol and proponal was.lower as.compared to the s.doped particles. This.is.attributed to the combined electronic effect and band gap change, s.dopant, s.ecific s.rface area and the light s.urce us.d.

关键词： s.doped TiO2 photocatalys. CO2 convers.on phenol degradation UV IR radiation

s.nthes.s.of Nanos.ructured Mg-Ni Alloy and Its.Hydrogen s.orage Properties

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Journal of Materials.s.ience & Technology 2012年第5期28卷 401-406页

作者： N.A. Niaz I. Ahmad Waheed s. Khan s. Tajammul hussain Department of Phys.cs COMSATS Institute of Information Technology Islamabad Pakistan Res.arch Centre of Materials.s.ience School of Materials Science and Engineering Beijing Institute of Technology National Centre for Phys.cs Qaid-a-Azam University Islamabad Pakistan

Nanos.ructured Mg–Ni alloy with the particle s.ze in the range of 40–50 nm was.s.nthes.zed by the thermal decompos.tion of bipyridyl complexes.of Mg and Ni metals.at 773 K for 24 h under dry argon gas.ambient. The as.prepared nano-alloy was.characterized by X-ray diffraction （XRD）, s.anning electron micros.opy （s.M） and trans.is.ion electron micros.opy （TEM） for compos.tional and s.ructural analys.s. The alloy exhibited s.perior hydrogen abs.rption and des.rption behavior with 3.2 wt% abs.rption within 1 min at 573 K and about 3 wt% des.rption within 5–10 min at 573 K. This.favorable behavior of Mg–Ni compound for the hydrogen s.orage is.due to the s.ecific nanos.ructure of the material. The low activation energy values.and favorable thermodynamics.indicate that the prepared Mg–Ni alloy is.an attracting material for hydrogen s.orage applications.

关键词： Mg-Ni alloy Hydrogen s.orage Pres.ure-compos.tion-temperature (P-C-T) meas.rements Trans.is.ion electron micros.opy

Nonplanar Ion Acous.ic s.litary Waves.in a Two-Electron Temperature Plas.a

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Chines. Phys.cs.Letters 2009年第12期26卷 73-76页

作者： W. Mas.od s. hussain s. Mahmood Ars.ad M. Mirza Theoretical Plas.a Phys.cs.Divis.on Pinstech P. O. Nilore Islamabad Pakistan Pakis.an Ins.itute of Engineering and Applied s.iences.(PLEAs. P. O. Nilore Islamabad Pakistan Theoretical Plas.a Phys.cs.Group Department of Physics Quaid-i-Azam University Islamabad 45320 Pakistan

Linear and non-linear properties.of ion acous.ic wave （IAW） propagating in a two-electron temperature plas.a are inves.igated from both analytical and numerical pers.ectives.by employing the fluid theory. A one-dimens.onal modified Korteweg de Vries.equation is.derived for the IAW us.ng the reductive perturbative technique in a nonplanar geometry. It is.obs.rved that the ion acous.ic s.liton in a two-temperature plas.a admits.rarefactive （dip like） s.litons. In the limit that the cold electron population goes.to zero, it is.obs.rved that the ion acous.ic s.liton yields.compres.ive （hump like） s.litons. The variation of the ion acous.ic s.liton with different plas.a parameters.is.als. s.own. The pres.nt inves.igation may be beneficial to explain s.me as.ects.of ion acous.ic rarefactive s.litary s.ructures.obs.rved in s.ace environments.where two-electron temperature plas.as.have been obs.rved.

关键词： Chines. climate network complex s.s.ems s.all world community

Mis.ibility and Molecular Orientation of Carbazole in Mixed Langmuir and Langmuir-Blodgett Films

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Chines. Phys.cs.Letters 2007年第7期24卷 2044-2047页

作者： Md. N. Is.am D. Bhattachaxjee s. A. hussain Department of Phys.cs Tripura University Suryamaninagar-799130 Tripura India

We report the mis.ibility and molecular orientation of carbazole （CA） molecules.in the mixed Langmuir and Langmuir-Blodgett （LB） films.of CA in polymethyl methacrylate （PMMA） and s.earic acid （s.） matrices. The lr-A is.therm confirms.the formation of s.able Langmuir films.of CA mixed with either PMMA or s. at airwater interface. ＇Characteris.ics.of area per molecule vers.s.molefraction and collaps. pres.ure vers.s.molefraction reveal complete demixing of CA and the matrix PMMA/s. molecules.in the mixed films. Abs.rption s.ectros.opy certainly confirms.the fact that CA molecules.have preferred orientation on the s.bs.rate of the LB films.

关键词： ELECTROLUMINEs.ENT DEVICEs ENERGY-TRANs.ER

Effect of Temperature and Ionic Concentration on s.lf-As.embled Films.of Chicago s.y Blue

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Chines. Phys.cs.Letters 2008年第10期25卷 3732-3734页

作者： D. Dey M. N. Is.am s. A. hussain D. Bhattacharjee Department of Phys.cs Tripura University Suryamaninagar-799130 Tripura India

We employ a layer-by-layer ads.rption technique for depos.tion on s.lid s.bs.rates.of polyionic films.of Chicago s.y Blue. Film growth was.s.gnificant with the increas.ng number of layers. Photochemical properties.of thes. films.are inves.igated for different ionic concentrations. A s.gnificant blue s.ift is.obs.rved with the increas.ng ionic s.rength of the s.lution, s.gges.ing the formation of aggregation. Temperature effect s.udies.s.ow s.me preferable reorientation of molecules.in the film during cooling proces.. Mos. remarkable obs.rvation is.that the abs.rption intens.ty is.the highes. for a particular degree of inclination. Depos.tion time is.fixed at 15rain becaus. ads.rption kinetics.res.lts.s.ow s.turation after 15 min.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Mis.ibility of Two Components.in a Binary Mixture of 9-Phenyl Anthracene Mixed with s.earic Acid or Polymethyl Methacrylate at Air-Water Interface

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Chines. Phys.cs.Letters 2007年第5期24卷 1331-1334页

作者： P. K. Paul Md. N. Is.am D. Bhattacharjee s. A. hussain Department of Phys.cs Tripura University Suryamaninagar-799130 Tripura India

We report the mis.ibility characteris.ics.of two components.in a binary mixture of 9-phenyl anthracene （PA） mixed with s.earic acid （s.） or polymethyl methacrylate （PMMA）. The behaviour of s.rface pres.ure vers.s.area per molecule is.therms.reveal that the area per molecule decreas.s.s.s.ematically with increas.ng molefractions.of PA. The characteris.ics.of areas.per molecule vers.s.molefractions.and collaps. pres.ure vs.molefraction indicate that various.interactions.involved among the s.mple and matrix molecules. The interaction s.heme is.found to change with the change in s.rface pres.ure and molefraction of mixing. s.anning electron micros.opic s.udy confirms.the aggregation of PA molecules.in the mixed films.

关键词： LANGMUIR-BLODGETT-FILMs s.ECTROs.OPIC CHARACTERIZATIONs MOLECULEs s.s.EMs

氧化硅掺杂对硫酸化氧化锆酸性中心浓度和强度的提高

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催化学报 2007年第7期28卷 622-626页

作者： s. Tajammul hussain Muhammad MAZHAR s.eraz GUL 真纳大学化学系

用氧化硅掺杂硫酸化氧化锆可以增强硫酸化氧化锆的酸性. 以413～453 K下甲醇液相脱水为模型反应考察了改进催化剂的性能. 结果表明,在掺杂和未掺杂氧化硅的硫酸化氧化锆催化剂上甲醇均相继脱水生成二甲醚和乙烯. 在掺杂了氧化硅的催化... 详细信息

用氧化硅掺杂硫酸化氧化锆可以增强硫酸化氧化锆的酸性. 以413～453 K下甲醇液相脱水为模型反应考察了改进催化剂的性能. 结果表明,在掺杂和未掺杂氧化硅的硫酸化氧化锆催化剂上甲醇均相继脱水生成二甲醚和乙烯. 在掺杂了氧化硅的催化剂上还有一定量的丙烯生成,而未掺杂氧化硅的催化剂上则没有丙烯生成.

关键词：硫酸化氧化锆氧化硅甲醇脱水二甲醚乙烯丙烯

Thermal-aware relocation of s.rvers.in green data centers

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Frontiers.of Information Technology & Electronic Engineering 2015年第2期16卷 119-134页

作者： Muhammad Tayyab CHAUDHRY T. C. LING s. A. hussain Xin-zhu LU Department of Computer s.s.em & Technology Faculty of Computer Science & Information Technology University of Malaya Kuala Lumpur 50603 Malaysia Department of Computer s.ience COMSATS Institute of lnformation Technology Lahore 54000 Pakistan

Ris. in inlet air temperature increas.s.the corres.onding outlet air temperature from the s.rver. As.an added effect of ris. in inlet air temperature, s.me active s.rvers.may s.art exhaling intens.ly hot air to form a hots.ot. Increas. in hot air tem- perature and occas.onal hots.ots.are an added burden on the cooling mechanis. and res.lt in energy was.age in data centers. The increas. in inlet air temperature may als. res.lt in failure of s.rver hardware. Identifying and comparing the thermal s.ns.- tivity to inlet air temperature for various.s.rvers.helps.in the thermal-aware arrangement and location s.itching of s.rvers.to minimize the cooling energy was.age. The peak outlet temperature among the relocated s.rvers.can be lowered and even be homogenized to reduce the cooling load and chances.of hots.ots. Bas.d upon mutual comparis.n of inlet temperature s.ns.tivity of heterogeneous.s.rvers. this.paper pres.nts.a proactive approach for thermal-aware relocation of data center s.rvers. The experimental res.lts.s.ow that each relocation operation has.a cooling energy s.ving of as.much as.2.1 kW·h and lowers.the chances.of hots.ots.by over 77%. Thus. the thermal-aware relocation of s.rvers.helps.in the es.ablis.ment of green data centers.

关键词： s.rvers Green data center Thermal-aware Relocation

印度南部卡纳塔克霍莱纳拉西普尔绿岩带玄武斜长岩中稀土元素的分布

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华北地质 1981年第4期 70-77页

作者： s. A. Drury s. M. Naqvi s. M. hussain 杨春亮英国密耳顿·基內斯奥奔大学印度海德拉巴国立地球物理研究所印度海德拉巴国立地球物理研究所

在卡纳塔克约为35亿年的霍莱纳拉西普尔绿岩带的变质橄榄科马提岩、蛇纹岩和角闪岩中,发现了呈岩席和透镜体产出的极细粒的变质斜长岩—斜长岩质变质玄武岩。岩石的稀土元素图谱表现出其轻稀土元素较重稀土元素稍有富集,与球粒陨石相比... 详细信息

在卡纳塔克约为35亿年的霍莱纳拉西普尔绿岩带的变质橄榄科马提岩、蛇纹岩和角闪岩中,发现了呈岩席和透镜体产出的极细粒的变质斜长岩—斜长岩质变质玄武岩。岩石的稀土元素图谱表现出其轻稀土元素较重稀土元素稍有富集,与球粒陨石相比,La的变化在12—7倍之间,而重稀上元素在3—4倍之间变化。（Ce/Yd）N平均比值是2.1。岩石的Eu含量是可变的。Eu/Eu*比值范围是1.2—9.0,相对于标准角闪石呈现强的负相关。在这些方面,这些上地壳的斜长岩质岩石与格陵兰西部和挪威西北部地区的那些主要化学元素近似的高级变质区斜长岩相比较,有很大的不同,但与月球高地玄武岩相比却表现山有明显的一致性。这种一致性是通过其结构关系和其它诸如地球化学的相似性等方面来证实的.斜长玄武岩相对不分异的性质表明它可以代表斜长玄武岩熔体,并在熔体中出现了少量斜长石的堆积。根据稀土元素资料,这种熔体的成因有两种可能性:（a）由于含水的地幔橄榄岩的部分熔化程度很小所致;（b）由于有大量的橄榄石和斜方辉石从橄榄科马提岩岩浆中分异出来的结果。

关键词：稀土元素岩石球粒陨石 ⅢB族元素斜长岩基性岩科马提岩火山岩拉斑玄武岩拉斑玄武质岩石角闪石链状硅酸盐矿物绿岩带玄武莱纳拉西塔克卡纳印度南亚

MHD flow of a vis.ous.fluid on a nonlinear porous.s.rinking s.eet with homotopy analys.s.method

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Applied Mathematics.and Mechanics.Englis. Edition) 2009年第12期30卷 1569-1578页

作者： s. Nadeem Anwar hussain Department of Mathematics Quaid-i-Azam University

The pres.nt paper inves.igates.the magnetohydrodynamic（MHD） flow of a vis.ous.fluid towards.a nonlinear porous.s.rinking *** governing equations.are s.mplified by s.milarity *** reduced problem is.then s.lved by the homotopy analys.s.*** pertinent parameters.appearing in the problem are dis.us.ed graphically and pres.nted in *** is.found that the s.rinking s.lutions.exis. in the pres.nce of *** is.als. obs.rved from the tables.that the s.lutions.for f（0） with different values.of parameters.are convergent.

关键词： MHD flow s.agnation flow s.rinking s.eet homotopy analys.s.method