CAN总线在细纱机控制系统中的应用

分析了CAN总线在细纱机控制系统中的可行性,介绍了基于ColdFire MCF52235的细纱机控制系统的构成和PLC编程,并给出了单锭CAN节点的软件设计方案。     

断层模型约束反演在MTH地区煤层横向预测中应用研究

利用相干体确定断层平面的走向特征,在剖面上采用井点处断点引导小断层解释,准确落实其空间位置,并建立精细的断层模型,在此基础上,利用断层约束反演技术,进行煤层的横向预测。MTH地区实例表明,基于断层模型约束反演技术的煤层横向预测方法,可精细描述煤层变薄带、分叉合并带、厚度变化等赋煤状态。     

Electrochemical properties of some cobalt antimonides as anode materi-als for lithium- ion batteries

Some cobalt antimonides have been prepared and studied as the candidate anode materials for lithium ion batter-ies. Reversible capacities of 424,423 and 546 mA·h·g-1 were measured at the first cycle for as-solidified CoSb2, CoSb3 and annealed CoSb3 respectively. A low lithium ions diffusion coefficient in the order of 10-16 m2·s-1 was estimated from the coulometric titration measurements in the annealed CoSb3 electrode. It was found that the electrochemical properties of fine powders are significantly better than coarse powders. However the SEM picture shows that the nano-sized CoSb3 powders gathered to larger granules, which worsens somewhat the capacity retention of the nano-sized materials, although the volume capacities of the annealed and ball milled CoSb3 remain near twice of that of graphite after 50 cycles.     

Preparation and characterization of GaN films grown on Ga-diffused Si （111） substrates

Hexagonal GaN films were prepared by nitriding Ga2O3 films with flowing ammonia. Ga2O3 films were deposited on Ga-diffused Si (111) substrates by radio frequency (r.f.) magnetron sputtering. This paper have investigated the change of structural properties of GaN films nitrided in NH3 atmosphere at the temperatures of 850, 900, and 950℃ for 15 min and nitrided at the temperature of 900℃ for 10, 15, and 20 rain, respectively. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to analyze the structure, surface morphology and composition of synthesized samples. The results reveal that the as-grown films are polycrystalline GaN with hexagonal wurtzite structure and GaN films with the highest crystal quality can be obtained when nitrided at 900℃ for 15 min.     

钼磷系缓蚀阻垢剂SK-107的缓蚀、阻垢性能研究

通过大量缓蚀、阻垢实验,着重介绍了钼磷系缓蚀阻垢剂SK-107在高碱度水且局部漏氨的合成氨循环水系统中的缓蚀、阻垢性能。     

高钒高速钢碳化钒形态的数值化分析

针对碳化钒的不同形态,设计出定量分析软件,并利用形状因子K,实现了高钒高速钢不同碳化物形态数值化处理,当K介于0.785～1.000之间碳化钒形态为团球状;K≤0.223,碳化钒呈开花状.高钒高速钢当碳含量达到4.2%时,K为0.86和当量直径D为0.78μm,碳化物呈团球状均匀分布.     

新型冷轧(拔)无缝钢管高分子润滑工艺研究

提出了冷轧(拔)无缝钢管高分子润滑工艺。研究了该工艺的PL膜各种特性。介绍了工业实验情况。实验证明,高分子润滑工艺完全满足冷轧(拔)钢管工艺要求,并具有操作简便、环境污染小等优点,完全可以代替传统的磷化-皂化润滑工艺。     

移动定位技术的现状与发展趋势

基于位置服务为人们的日常生活带来了极大的方便,同时也推动了移动定位技术行业的快速发展。针对移动定位技术发展状况,分析目前主流定位技术的优劣,并对取得的突破作简单的总结归纳。     

基于漏磁原理的钢丝绳探伤仪影响因素研究

介绍了钢丝绳探伤仪漏磁检测原理,并使用有限元分析方法分析了传感器零件的材料、钢丝绳的提离距离及断丝根数等对基于漏磁原理的钢丝绳探伤仪检测结果的影响。分析结果表明,提离距离、断丝根数等因素对探伤仪检测结果影响较大,断丝角度、深度等因素影响较小。