ZSF合金抗钻性及复合韧化效果

研究了ＺＳＦ合金的显微组织及其抗钻削性和冲击韧性。结果表明,ＺＳＦ合金的显微组织是奥氏体＋共晶碳化物。该组织的硬度虽不很高（３５ＨＲＣ）却具有很强的抗钻削能力,其主要机制是钻削时加工硬化引起部分奥氏体转变成马氏体。该合金单体结构冲击韧性较低,与韧性好的Ｑ２３５Ａ钢焊接复合后抗冲击能力可明显提高。     

S-玻纤织物增强复合材料层合板的冲击损伤特性研究

通过空气炮冲击实验装置、渗透剂增强的Ｘ射线照相法和高强光背射法分析了Ｓ－玻纤织物增强复合材料层合板的冲击损伤特性,研究了冲击速度、铺层角、弹丸质量变化时材料的破坏机理与特征,其研究结论对抗弹复合材料的进一步研究与应用具有指导意义。     

球磨机钢球大小的试验研究

铜山矿分别在2台球磨机上进行加大钢球的生产试验,结果平均处理量增加,钢球单耗降低,用电单耗降低,与理论计算基本相符。现用各种磨机普遍存在充填率少、钢球(棒)小、转速低的问题,在增加充填率和加快转速的改造中,加大钢球(棒)更能获得巨大的经济效益。     

控制矿石溜井冲击风流的技术措施

向溜井卸矿将产生冲击风流，风流中央带有粉尘会污染井下空气。文中阐述了设计溜井时须结合矿山条件对溜井的井位、结构型式、井口密闭等采取相应的技术措施。     

用MPS方法数值模拟低充水液舱的晃荡

液体晃荡是一种非线性的自由面流动现象.在低充水率下,由于液体具有很大的运动空间,晃荡现象具有强烈的非线性特征,自由面的变形较大,剧烈时甚至会翻卷和破碎,这给数值模拟带来很大挑战.本文基于移动粒子半隐式法(Moving Particle Semi-Implicit,MPS)对低充水率的液舱晃荡问题进行了数值模拟.结果表明:当激励频率等于共振频率时,液体撞击到了液舱的顶板,并出现了飞溅现象,此时液体对侧舱壁产生了较大的抨击压力;在低于共振频率时,自由面出现了破碎波及波前的翻卷和融合等现象,抨击压力相对较小.计算结果表明,MPS方法能够很好地预测晃荡引起的拍击现象,数值计算得到的压力能够与实验结果很好地吻合.在自由面的追踪上,MPS方法具有很大的灵活性,能够很好地处理自由面的破碎、融合及液体的飞溅等流动现象.     

Analysis and simulation of QSP beamformer

The real Direction Of Arrival (DOA) varies with time in mobile communication system. In such situation, the performance of conventional beamformers will be degraded obviously. Quantum Signal Processing (QSP) beamformer is insensitive to DOA errors, thus it can achieve stable output performance in such circumstance. This letter verified the effectiveness and feasibility of the QSP beamformer by simulation results.     

Impact performances of steel tube-confined recycled aggregate concrete (STCRAC) after exposure to elevated temperatures

The impact behaviours of steel tube-confined recycled aggregate concrete (STCRAC) following exposure to elevated temperatures of 20 °C, 200 °C, 500 °C and 700 °C were experimentally investigated using a 100 mm-diameter split Hopkinson pressure bar (SHPB). The recycled coarse aggregate (RCA) replacement ratios were set as 0, 50% and 100%. The effect of RCA replacement ratio and exposure temperature on the impact properties of STCRAC were analysed in terms of failure modes, stress-strain time history curve and dynamic increase factor (DIF). The results show that the fire-damaged STCRAC can maintain its integrity during impact load. However, there were evident degradations in the dynamic behaviour of STCRAC after exposure to high temperatures of 500 °C and 700 °C. The ultimate impact strength, impact secant modulus and residual impact strength of STCRAC obviously decreased because of the damage due to high temperature exposure. But the degradations of both the ultimate impact strength and impact secant modulus of STCRAC under impact loading were less severe than those under quasi-static loading. The remaining strength factor and the DIF tended to increase with the raise of the elevated temperatures. Overall, during the impact loading, the fire-deteriorated STCRAC exhibited excellent impact behaviour.     

The Territorial Impact Assessment of transport: the case of the Egnatia motorway system in the cohesion potential of Southeast Europe

Territorial Impact Assessment (TIA) is proposed as a critical tool in order to investigate the way policies affect spatial development and hence territorial cohesion. The paper introduces a TIA methodological model in relation to transport sector. The design of the methodological model is based on a quantitative evaluation framework that comprises a set of selected indicators applied in a cross-border area of southeast Europe, influenced by the operation of the Greek motorway system of Egnatia and its vertical axes. The indicators are grouped into three main fields of TIA, i.e. transport intermodality, polycentric spatial organization and cross-border territorial cooperation. The TIA’s indicators are approximated by quantitative analysis. The procedure concludes to an overall composite indicator measuring the ‘level of territorial cohesion’ along with some core results and the expected added value. It also highlights some key technical aspects about the routines used and proceeds to suggestions for further refinement.     

Evaluation of the environmental impact assessment (EIA) of Chinese EIA in Myanmar: Myitsone Dam,the Lappadaung Copper Mine and the Sino-Myanmar oil and gas pipelines

The economic relationship between China and Myanmar is regarded as a win–win cooperation. However, Chinese investments, especially in extractive and natural resource sectors, are associated with a number of unwanted environmental consequences. Moreover, the environmental impact assessment (EIA) quality of Chinese enterprises has often been criticized. EIA identifies adverse impacts to the environment through evidence-based decision making. On this basis, this paper provides an evaluation of Chinese EIA performance within the natural resources sector through a structured review of 15 environmental impact statements (EISs). This research also evaluates the EISs of the three largest and most controversial projects, the Myitsone Hydropower Dam, Lappadaung Copper Mine and Sino-Myanmar oil and gas pipelines. The findings reveal several omissions, inadequacies and deficiencies in all the projects with a significant number of EISs falling short of satisfactory quality. Through the analysis, the paper summarizes the factors affecting the EIA performance and proposes feasible recommendations to improve EIA practices in Chinese development projects in Myanmar.     

棉织品生态设计的研究

为了改善我国现有棉织品的环境特性,提出对棉织品进行生态设计的方案。基于产品生态设计的原则和棉织品的环境特性,将生态产品设计过程分为生态原料的设计、生态工艺设计、生态销售设计、生态使用设计、生态处理设计,并对生态设计后的棉织品重新进行生命周期评价,与现有棉织品的环境影响负荷进行分析对比。认为:在对棉织品进行生态设计后,其对环境的影响显著降低,并建议将环境影响负荷指标EIL=0.484作为衡量棉织品是否环保的一个指标。