D.T. Thao
金属学报(英文版)
This paper is to represent new algorithms to predict process parameters on top-bead width in robotic gas metal arc (GMA) welding process. The models have been developed: linear, curvilinear and intelligent model based on full factorial design with two replications. Regression analysis was employed for optimization of the coefficients of linear and curvilinear models, while genetic algorithm (GA) was utilized to estimate the coefficients of an intelligent model. Not only the fitting of these models were checked and compared by using a variance test (ANOVA), but also the prediction on top-bead width using the developed models were carried out based on the additional experiments. The developed models were employed to investigate the characteristic between process parameters and top-bead width. Resulting solutions and graphical representation showed that the intelligent model developed can be employed for prediction of bead geometry in GMA welding process.
关键词:
Top-bead width
吕会议
,
王铁山
,
陈建勇
,
杨振
,
刘盛进
,
方开洪
原子核物理评论
近年来一系列实验表明,金属环境中的低能带电粒子引起的核反应截面与气体靶中的相比出现明显增大,这种现象通常被归结为电子屏蔽效应. 全面介绍了金属环境中D(d, p)T反应电子屏蔽效应的测量方法、数据分析和实验结果的规律性,并简要论述了包括德拜等离子体模型在内的各种理论模型对实验结果的解释. 通过研究,可以获得有关核物理、核天体物理和凝聚态物理的宝贵知识.
关键词:
低能核反应
,
电子屏蔽效应
,
德拜模型
赵国华
,
齐砚勇
,
潘玉峰
硅酸盐通报
对YNLL水泥厂2500 t/d生产线进行热工标定并分析,系统烧成热耗为3889 kJ/kg.cl,高于全国平均水平.高温风机拉风偏大,一级筒出口温度为370℃,偏高.篦式冷却机效果欠佳,AQC抽风量偏高,直接影响了熟料质量和余热发电量,热回收效率偏低.经过改进和优化,熟料产能提高为2600 t/d.该生产线系统还有比较大的潜力,熟料产量还有可能进一步提高,热耗及电耗均可能明显下降.
关键词:
热工标定
,
新型干法水泥
,
篦冷机
李新东
,
沙春鹏
,
乔永莲
,
韩培培
腐蚀学报（英文）
doi:10.11903/1002.6495.2015.048
对2D12-T4热处理状态铝合金微弧氧化防护膜层的拉伸强度和疲劳性能进行了研究.结果表明,随着氧化时间的增加,膜层厚度正比增加,膜层主要由γ-Al2O3和a-Al2O3及大量的非晶相构成;微弧氧化对基体的拉伸强度等力学性能影响较小,但会显著降低材料的疲劳性能,降低超过基体的100倍.
关键词:
2D12-T4铝合金
,
微弧氧化
,
拉伸强度
,
疲劳性能
顾延君
,
李全良
,
孙永涛
,
任卫香
,
蔡明明
黄金
doi:10.11792/hj20160515
基于对低能耗及设备高效利用的要求,鑫汇公司350 t/d选矿厂原工艺流程已无法满足现场的生产需求,对其进行了工艺优化改造.通过调整破碎机安装位置、振动筛安装方向、药剂制度以及更换细碎设备、筛网尺寸等措施,达到了节能降耗的目的,不仅增加了选矿厂的生产能力,而且提高了金的回收率,由89.08%提高到92.58%,年增创收益达1494.41万元,经济效益和社会效益显著.
关键词:
选矿厂
,
金
,
工艺改造
,
碎矿
,
处理能力
,
回收率
Journal of Alloys and Compounds
As hydrogen, deuterium and tritium storage materials, a series of investigations of mechanical and thermal properties of titanium hydrides, deuterides and tritides have been performed, however, very limited theoretical studies of thermodynamic properties for them can be found. Based on density-functional theory (DFT) and density-functional perturbation theory (DFPT) we have discussed systematically the hydrogen isotope effects on the thermodynamic properties of TiX2 (X = H, D, and T) system. Our calculations indicate that for evaluating accurately their physical properties at absolute zero temperature, such as the equilibrium lattice constants, bulk modulus, and heat of formation, the zero-point energy correction must be taken into account. By performing the phonon calculation within quasiharmonic approximation (QHA), we obtain their vibrational free energies, vibrational entropies, and temperature dependence of specific heat, thermal expansion, and bulk modulus. Those results demonstrate that comparing with TiH2, TiT2 and TiD2 are more stable and the zero-point effects play an important role in their thermal expansion. The increase in the force constant between Ti and H causes the higher value of specific heat of TiH2 during the phase transition from FCC to FCT. In addition, comparing with available experimental values, we can conclude that QHA is feasible for describing the thermal properties of TiX2. (C) 2006 Elsevier B.V. All rights reserved.
关键词:
isotope effects;thermodynamic properties;density-functional;perturbation theory;quasiharmonic approximation;functional perturbation-theory;neutron spectroscopy;thermal-properties;titanium;hydrogen;dependence;expansion;constants;palladium;hydrides
张仁高
,
赵宝京
,
王述策
,
王善建
黄金
doi:10.11792/hj20140812
浮选机是选别金矿、铜矿、钼矿、铁矿等的硫化矿物不可缺少的设备之一。系统地介绍了SJF10、SJF30圆型浮选机的特点以及在焦家金矿6000 t/d选矿厂的应用情况。应用结果表明，在原矿品位4．20 g/t的情况下，精矿品位79．85 g/t，尾矿品位0．17 g/t，浮选回收率96．15％；同常规方形槽充气式浮选机相比，精矿品位提高6 g/t，浮选回收率提高0．8％，节能效果提高15％，减少占地面积30％，可提高3％～5％的经济效益，获得了良好的应用效果。
关键词:
圆型浮选机
,
新型
,
高效
,
节能
,
液位自动控制
