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6篇 您的检索式:作者名="M.Mohammed"
    题名 作者 年代 出处 被引量
1Minimum ignition energy for micro and nano flash powders显示文摘A.Azhagurajan N.Selvakumar M.Mohammed Yasin 2012Proc Safety prog2012,,1:1
2Empirical investigation to explore potential gains from the amalgamation of phase changing materials(PCMs)and wood shavings显示文摘The reduction of gained heat,heat peak shifting,and the mitigation of air temperature fluctuations are some desirable properties that are sought after in any thermal insulation system.It cannot be overstated that these fac-tors,in addition to others,govern the performance of such systems thus their effect on indoor ambient conditions.The effect of such systems extends also to Heating,Ventilation and Air-conditioning(HVAC)systems that are set up to operate optimally in certain conditions.Where literature shows that PCMs and natural materials such as wood-shavings can provide efficient passive insulation for buildings,it is evident that such approaches utilise methods that are of a degree of intricacy which require specialist knowledge and complex techniques,such as micro-encapsulation for instance.With technical and economic aspects in mind,an amalgam of PCM and wood-shavings has been created to be utilised as a feasible thermal insulation.The amalgamation was performed in the simplest of methods,through submerging the wood shavings in PCM.An experimental procedure was devised to test the thermal performance of the amalgam and compare this to the performance of the same un-amalgamated materials.Comparative analysis revealed that no significant thermal gains would be expected from such amal-gamation.However,a significant reduction in the total weight of the insulation system would be achieved that,in this case,shown to be up to 20.94%.Thus,further reducing possible strains on structural elements due to the application of insulation on buildings.This can be especially beneficial in vernacular architectural approaches where considerably large amounts and thicknesses of insulations are used.In addition,cost reduction could be attained as wood shavings are significantly cheaper compared to the cost of PCMs.Adham M.Mohammed Amira Elnokaly Abdel Monteleb M.Aly 2021Energy and Built Environment2021,2,3:0
3基于微流控技术的裂隙水侵特征可视化研究显示文摘煤岩裂隙中的流体侵入广泛存在于地下工程中。为明确裂隙中流体的微观动力学行为,利用三维形貌仪获得了苏拉特盆地煤的微米级裂隙,通过Stitching算法重建完整的裂隙网络结构,并通过微流控技术批量制作表征裂隙结构的透明模型。利用多相流体显微成像系统可视化不同流速、润湿性条件下的流动过程,捕捉水相在微裂隙模型中完整的侵入过程。高流速可以促进水相侵入开度较小的分支通道,气水前缘保持较小的曲率削弱了滞后效应的影响,突破发生后可进一步增强在盲端、封闭结构中的侵入程度,突破后的含水饱和度增长较快。润湿性的转变影响水相侵入过程优势通道的选择,疏水环境中水相侵入突破时间短,较大的表面张力导致滞后效应的影响显著。突破后水相可继续侵入连通通道,但在封闭通道中的入侵率极低。研究成果对岩体非饱和条件下的岩-气-液作用机制具有重要的指导意义。张继成 陈绍杰 姬松涛 冯帆 ALEKSEY A.Khoreshok ZAKI M.Mohammed 2022Journal of Central South University2022,29,12:0
4以潮汐为主的红树林湾水体中营养物质浓度的空间和时间变化:桑给巴尔楚瓦卡海湾显示文摘本文研究了桑给巴尔楚瓦卡(Chwaka)海湾Mapopwe小湾水中可溶性无机营养物(磷酸盐、氨、硝酸盐和亚硝酸盐)的空间和时间变化。结果表明,小湾中营养物质具有明显的空间变化,其浓度随着水向开阔海湾的流动而呈降低趋势。氨的浓度具有明显的季节变化,其平均浓度在干旱季节高于湿润季节。然而硝酸盐和亚硝酸盐的情况则相反。产生这种现象的原因很多,如海底氧浓度的变化、盐度的不同、水流的变化以及与开阔海湾的水体交换等。而且水体的初级生产和底栖微生物作用也对此有一定的影响。总的来看,本研究表明Mapopwe小湾不存在可溶性营养物向邻近海湾的净输出现象。Salim M.Mohammed Ron W.Johnstone 李喆 1995人类环境杂志1995,24,7:0
5坦桑尼亚水质和污染研究回顾显示文摘坦桑尼亚的海岸带(图1)有多种生物栖息地,其中包括珊瑚礁、红树林、海草床、沙坝、湿地和沙滩.除了承担海岸带所有功能中的基本连接作用外,这些海岸带栖息地还提供了生物和非生物资源.范晓婷 Salim M.Mohammed 2002AMBIO-人类环境杂志2002,31,7:0
6Zinc Oxide Nano Particles Integrated Kenaf/Unsaturated Polyester BioComposite显示文摘Increasing need for materials with special features have brought various new inventions,one of the most promising hope for new material with special features and functionalities is composites materials.Thus,this study report an integration of zinc nanoparticles into kenaf/polyester polymer composite to introduce new behavior to the composite.The composite behaviors were compared for mechanical,thermal,moisture absorption and biodegradability properties.Prepared Zinc Oxide nanoparticles entrenched in the kenaf/polyestaer composites net structure through chemical bonds between kenaf/ZnO/polyester resin,existence of ZnO significantly influence the mechanical and thermals properties of composites.Thermal analysis based on(TGA)response revealed the integration of ZnO nanoparticles improved the thermal stability when thermal decomposition temperature beyond 3650 C.The thermal cracking decreased with present of ZnO and increase with kenaf content(layers).The modulus,Tensile strength,break at elongation,flexural modulus,flexural strength and impact strength of the composites with higher content kenaf/ZnO nanoparticle are 560 MPa,58MPa,1.8%,1300 PMa,68 MPa and 31 MPa,respectively.Thus,addition of kenaf layers and ZnO results in larger mechanical properties enhancement,the results of the contact angle show improvement in wetting of the fibres with addition of ZnO nanoparticles.Mohammed Mohammed Bashir O.Betar Rozyanty Rahman Aeshah M.Mohammed Azlin F.Osman Muhammed Jaafar Tijjani Adam Omar S.Dahham Uda Hashim Nik Z.Noriman 2019Journal of Renewable Materials2019,7,10:0
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