钢铁生产流程铁资源效率的分析

以钢铁生产流程铁流图为基础,分析了高炉-转炉流程、电炉流程和混合流程的铁资源效率.流程铁资源效率的大小取决于各工序的金属收得率,金属收得率愈高,流程铁资源效率愈高.讨论了电炉钢比对混合流程铁资源效率的影响,结果表明,电炉钢比愈高,混合流程铁资源效率愈高.在此基础上,以中、美、日3国钢铁工业为例分析了电炉钢比和铁资源效率的关系.     

重介质管路中平板闸阀的寿命研究

通过分析了重介质系统管路中平板闸阀存在的问题,提出了延长平板闸阀的使用寿命的措施为:设计合理的结构和选择适当的材料.实践证明:该结果是可行的.     

回转窑新型支承结构的力学性能分析及设计

这里针对回转窑筒体在运转时发生持续下滑,,引起系统频发故障,造成停机的问题,分析论证了窑体下滑力产生的根本原因及消除方法;在理论分析的基础上,设计了消除下滑力的新型支承结构,给出了结构参数的计算方法以及不同斜度回转窑的设计参数值;探讨了新型结构设计应用中的关键问题。     

Effect of NaCl on the properties of Eu-doped Ca-α-SiAlON phosphors prepared by combustion synthesis

Eu-doped Ca-α-SiAlON phosphors, featuring high phase purity, uniform particle size of 3–5 μm and good luminescent properties with a yellow emission spectrum under blue light excitation, were prepared by a highly efficient combustion synthesis (CS) method. A certain amount of NaCl was applied as an innovative additive to regulate and control the properties of synthesized phosphors. Further, the effects of NaCl additive in the CS system were systematically investigated and rational proposed. It was found that the effect on accelerating nitridation and crystallization played a dominant role in the reaction as the content of NaCl was less than 6 wt%, while the effect of absorbing reaction heat through vaporization was dominant with the further-increased content of NaCl. The intensity of the emission spectrum for the sample doped with 6 wt% of NaCl was remarkably enhanced, nearly 40% more than the sample which was not NaCl-doped. Moreover, a continuous blue-shift phenomenon in emission spectra was observed with the increased content of NaCl.     

The effects of PVP surfactant in the direct and indirect hydrothermal synthesis processes of ceria nanostructures

CeO₂ nanostructures with completely different morphologies were successfully prepared using the same cerium source and mineralizer through the direct and indirect hydrothermal methods with different introducing strategies of PVP surfactant. The CeO₂ nanostructures tend to form the morphologies of nano-flowers and nano-cubes through the indirect and direct hydrothermal methods, respectively. X-ray diffraction (XRD) analyses revealed that both as-prepared nanostructures are composed of CeO₂ with a standard fluorite structure. The different synthesis mechanisms and corresponding chemical evolutions of the as-prepared CeO₂ nanostructures are discussed based on the different introducing strategies of PVP surfactant in the direct and indirect hydrothermal processes. Investigation of the UV-shielding ability of both CeO₂ nanostructures suggested that the UV absorbance of the nano-flowers is much higher than that of the nano-cubes.     

对城市道路平面交叉设计的探讨

从交通组织设计的角度出发，广泛参照国内外先进的理论与方法，结合平时工作积累的经验，从交叉口危险点、通行能力、渠化设计的角度进行分析探讨，并提出了一些思路，以供参考。     

“微时代”的大学生思想政治教育创新研究

随着网络的迅速普及,各种各样的网络交流平台不断涌现,给人们及时交流提供了很大便利,而以微博为代表的微媒体就是这样网络化了的交流平台。微博等微媒体的快速发展已经成为网上信息传播、交流的不可忽视的力量,不仅成为人们之间信息共享的重要交际工具,同时对在校大学生的日常生活学习、思想、价值观等都产生着深刻影响。本文拟在探讨"微时代"下微博等微媒体对大学生思想政治教育带来的挑战和机遇的基础上,研究"微时代"下大学生思想政治教育的创新,以期为今后我国大学生思想政治教育的进一步提高提供一点有益借鉴。     

A code protection scheme by process memory relocation for android devices

Multimedia Tools and Applications - Android devices is emerging as a significant force for multimedia big data, which hold an enormous amount of information about the users. The security and...     

闪光焊机的焊接过程及焊缝质量分析

酸洗-轧机联合机组生产线上的闪光对接焊机,由于原料板型的影响及操作经验不足,使焊缝难以保证,过轧机时焊缝断带率较高,影响冷轧产品的质量。通过对焊接过程中初始闪光、过梁爆破以及顶锻各阶段的监控,对移动夹具的给进速度的积分值、材料的可焊接性以及闪光行程、顶锻行程等焊接参数进行调整,对影响焊缝质量的各种因素进行分析,对焊接参数进行了修正,如板厚为2.0mm的板材焊接电流调节器积分增益由原来的0.000 02调整为0.000 03,基本解决了焊缝质量问题。     

气浮-厌氧-接触氧化工艺处理油田联合站剩余污水

介绍了该工艺的运行原理以及工艺特点,并介绍了该工艺在冀东油田柳一联的运行情况,以及运行经验。