钢筋混凝土梁柱中节点抗震性能试验研究

概述了两个钢筋混凝土梁柱中节点在低周反复荷栽作用下的试验，通过试验。分析了这两个梁柱中节点的受力机理及抗震性能，通过对这两个节点抗震性能的比较。得出了抗震节点和非抗震节点抗震性能的优劣。     

箱形截面铝合金压弯构件截面影响系数研究

对箱形截面铝合金压弯构件的平面外稳定承载力进行了参数分析,建议截面影响系数η对于弱硬化合金和强硬化合金均取为0.7,这样可使相关公式的计算结果较为合理地满足设计要求.     

Numerical Simulation on Nugget Formation and Evolution in Spot Welding of Aluminum Alloy

With the squeeze of electrode tips, the oxide film on aluminum (Al) alloy surface is broken and numbers of micro-gaps are formed randomly. The micro-gaps act as conducting spots at the beginning of welding, so the contact resistance is extremely high and unstable in spot welding of Al alloy. In this paper, a new contact resistance model is adopted to simulate the nugget forming process. This model describes the random distribution characteristic of conducting spots. The simulation results indicate that, within the first 5 ms of welding current (AC, 50 Hz), the temperature distribution at the workpieces interface is seriously irregular. In addition, the nugget does not nucleate from the weld center and grow continuously, however, it nucleates randomly from several points almost instantaneously and then merges into an entity quickly. Experimental results agreed with the numerical simulation.     

Experimental and Finite Element Study of Steady State Micro-cutting Characteristics of Aluminum Alloy （2A12）

This paper studies the micro-cutting characteristics of aluminum alloy (2A12) based on a series of orthogonal experiments and finite element method (FEM) simulations. An energy-based ductile failure law was proposed in the FEM simulation. The simulated cutting forces and chip morphology were compared with experimental results. The simulation result indicates that there is a close relationship between the cutting force and cutting heat. The micro-cutting force decreases as the heat flux vector increases. Both the cutting heat and the micro-cutting force need a finite time to achieve a steady state. It is observed that with the cutting speed of 169.95 m/min and uncut chip thickness of 6 μm, the heat flux vector in the workpiece increases to a stable value after 0.06 ms; meanwhile, the principal cutting force decreases to a steady state correspondingly, i.e., the micro-cutting process achieves the steady state. It is concluded that the steady state micro-cutting simulation can reflect the cutting process accurately.     

利用废铝箔制备聚碱式氯化铝的实验研究

聚碱式氯化铝是常用的一种无机高分子絮凝剂。废铝箔具有很高的回收再利用的经济价值。通过实验研究利用废铝箔制备聚碱式氯化铝的pH值、聚合温度和烘干温度等适宜条件,并进行净水效果试验。     

炼钢污泥制备聚合硫酸铁铝絮凝剂及应用研究

研究了以炼钢污泥为原料制备聚合硫酸铁铝（PFAS）的方法,确定了合理的生产工艺和制备条件,用该絮凝剂处理焦化废水,并与聚合硫酸铁（PFS）的处理效果比较,结果表明,出水的CODCr、总氰化物、挥发酚、色度去除率分别提高约16.9%、12.5%、5.1%和5.3%。     

环境因素对纳米铝粉影响研究的现状

综述了纳米铝粉的活性应用研究现状和外界环境对纳米铝粉活性的影响,总结了纳米铝粉活性随储存时间和环境的温度、湿度的变化规律。     

Operando surface science methodology reveals surface effect in charge storage electrodes

Surface and interface play critical roles in energy storage devices, calling for operando characterization techniques to probe the electrified surfaces/interfaces. In this work, surface science methodology, including electron spectroscopy and scanning probe microscopy, has been successfully applied to visualize electrochemical processes at operating electrode surfaces in an Al/graphite model battery. Intercalation of anions together with cations is directly observed in the surface region of a graphite electrode with tens of nanometers thickness, the concentration of which is one order higher than that in bulk. An intercalation pseudocapacitance mechanism and a double specific capacity in the electrode surface region are expected based on the super-dense intercalants and anion/cation co-intercalation, which are in sharp contrast to the battery-like mechanism in the electrode bulk. The distinct electrochemical mechanism at the electrode surface is verified by performance tests of real battery devices, showing that a surface-dominant, nanometer-thick graphite cathode outperforms a bulk-dominant, micrometer-thick graphite cathode. Our findings highlight the important surface effect of working electrodes in charge storage systems.     

粉煤灰及其利用

介绍了火力发电厂排放的粉煤灰的主要物理化学性能 ,指出了综合利用粉煤灰的一些途径 ,着重对从粉煤灰中提取聚合铝和用粉煤灰制分子筛作了介绍     

Electrical Conductivity and Corrosion Resistanceof ZnFe_2O_4Based Materials Used as Inert Anodefor Aluminum Electrolysis

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