基于大数据背景下的企业生态系统架构研究

随着全球网络技术与移动通信设备的融合发展,“大数据”时代已经引起社会各界的重点关注。苹果、三星、华为、IBM、微软、腾讯等国际知名企业都开始建构出“大数据”时代的企业生态系统。本文将对“大数据”时代的企业生态系统的演化和建构进行深入分析。     

水基Fe3O4磁流体的制备工艺研究

用共沉淀法制备Fe3O4磁流体,总结出用十二烷基磺酸钠与聚乙二醇作为表面活性剂制备水基磁流体的合适条件:(1)反应温度为室温或不高于35℃;(2)表面活性剂十二烷基磺酸钠的最佳用量为0.0030～0.0040 g/80 mL;(3)第一次包裹的最佳pH为9～10;(4)聚乙二醇作为第二次包裹的表面活剂时,体系最佳温度为40℃左右;(5)表面活性剂聚乙二醇的最佳用量为0.0050～0.0060 g/80 mL。通过实验制得了能稳定存在180 d的水基磁流体。并用透射电镜、红外光谱、分光光度计、古埃磁天平等进行了初步表征。     

Zn掺杂对GdMnO体系的晶体结构影响

系统研究了Gd（1-x）ZnxMnO3（x=0,0.2,0.4,0.6,0.8,1.0）体系的结构。结果表明,实验样品具有正交对称性结构。当Zn掺杂浓度x≤0.4时,随着Zn掺杂浓度的增加,晶格常数b、c减小,而晶格常数a增大,晶胞体积逐渐减小;当掺杂浓度x≥0.6时,Zn掺杂浓度的增加,晶格常数b、c增大,而晶格常数a减小,晶胞体积逐渐增大。计算表明Gd（1-x）ZnxMnO3系列化合物的容忍因子在0.76~0.92范围,可以形成稳定的钙钛矿结构。     

Relationship of hydrocarbon and source-rock in Nos.3-5 tectonic belts of the Lenghu area, northern Qaidam Basin

Based on analyses of the components of crude oil hydrocarbons and carbon isotopes, the content of normal alkane de-creased from 49.00% to 20.10% when moving from the No.3 to No.5 tectonic belt of the Lenghu area of the Qaidam Basin, while cycloalkanes increased from 30.00% to 52.20% and aromatic and branch chain alkanes increased gradually as well. The maturity of sterane in crude oil is higher than that of its source-rock, which shows that the hydrocarbons were generated from a deep source-rock of high maturity around the tectonic belts of the Lenghu area. The analysis of the characteristics of carbon isotopes also shows that these isotopes of hydrocarbon compounds in the No.4 and No.5 tectonic belt are apparently heavier than those in the No.3 belt. The results of our research show that the hydrocarbons in the No.3 tectonic belt are mainly from a relatively rich sapropelic substance, while the hydrocarbons in the No.4 and No.5 tectonic belt originated mainly from organic matter of a rela-tively rich humic type substance.     

基于网络的多卡加密系统调度模型

在分析L inux系统单卡加密系统的基础上,详细分析了影响单卡加密系统并行处理数据报文效率的原因,提出了一种能够改善报文处理效率的基于网络的多卡加密系统调度模型,讨论了多卡加密系统调度模型的特点,分析了该模型中各模块的功能.通过实例,比较了单卡和多卡加密系统在并行处理数据报文时的差异.结果表明,多卡加密系统调度模型是网络平台下的信息安全传输的一种优化方法.     

数控加工三维场景几何建模技术研究

讨论了基于构件技术的数控加工三维场景建模技术,并以OpenGL和Visual C++6.0为开发平台,开发出一个基于STL文件格式的建模系统.     

块体非晶合金制备方法的研究进展

对大块非品合金的制备方法进行了总结和归纳,阐述了不同制备方法的基本原理,并对各种制备方法的优缺点进行了讨论.最后根据对不同制备方法的分析及探讨,对大块非晶合金制备方法的研究方向进行了展望.     

A nonlinear control method for the electromagnetic suspension system of the maglev train

To deal with the inherent nonlinearity and open-loop instability of the electromagnetic suspension (EMS) system, a new nonlinear control method is proposed. The simulation results show that, for a PID controller, the overshoot of the system response to an airgap step disturbance is about 3 mm, and the transient time is 6 s; however, for the proposed nonlinear controller, there is no overshoot and transient time within 2 s. The proposed method has a faster response and stronger robustness. With a designed bi-DSP suspension controller, this nonlinear control method was implemented on the Shanghai Urban Maglev Test Line (SUMTL) to validate its effectiveness and feasibility.

     

仿土质专用肥的开发和应用前景

本文介绍了基于某些名、优农产品在其生长过程中所需要的特定敏感元素,配制出“仿土质”专用肥。经施用证明,肥效显著,经济效益可观,具有推广应用的前景。     

乳胶涂料中填料粒径测定与分散剂的选择

介绍了重力沉降法和容量沉降法两种测定乳胶涂料中填料粒径的方法。通过比较粉体粒径结果显示：沉降法比激光法更形象直观，更能代表体系粒径真实情况。以滑石粉、重钙、轻钙粉体为基准，采用不同用量、不同类型的分散剂的容量沉降法进行比较得出：用容量沉降法能定量地对分散剂性能做出评价。