产教融合背景下高职特色专业群“平台+模块”课程体系建设研究

In view of the problems in the construction of characteristic professional groups in higher vocational colleges, the professional group of "intelligent manufacturing" is taken as the research object, and the "platform + module" suitable for the development of the industry will be constructed according to the content of the vocational ability planning courses of the post group. The curriculum system establishes the framework of professional groups, and explores and forms a strategic study to optimize and integrate professional group resources.     

Research on corrosion performance of 6061 aluminum alloy in salt spray environment

Salt spray corrosion test was carried out on 6061 aluminum alloy, and quasi-static tensile test at room temperature was carried out on the sample with universal testing machine. The effect of salt spray corrosion on the mechanical properties of 6061 aluminum alloy was studied by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and electrochemistry. The corrosion rate of 6061 aluminum alloy was quantitatively characterized by different corrosion parameters. It was found that local corrosion of 6061 aluminum alloy occurred in salt spray environment, mainly pitting corrosion and intergranular corrosion. With the increase of corrosion time, the polarization resistance of 6061 aluminum alloy decreases, and the corrosion rate significantly increases. The average corrosion rate and the maximum corrosion rate of 6061 aluminum alloy were characterized by corrosion weight loss and corrosion pit depth. And they can be transformed into each other. The mechanical properties of 6061 aluminum alloy were mainly affected by the depth of corrosion pit. With the increase of corrosion time, the tensile strength and fracture strain decreased, resulting in poor plasticity of the sample. At the same time, the change of elongation of 6061 aluminum alloy can be accurately predicted by the depth of corrosion pit.     

An evaluation of Acacia mearnsii tannin as an aluminum corrosion inhibitor in acid,alkaline, and neutral media

The electrochemical behavior of aluminum in tannin from Acacia mearnsii bark was evaluated by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in media under three different pH conditions: acid, alkaline, and neutral. A relationship among pH, polymerization grade (PG), zeta potential, surface, and electrochemical properties was observed in the inhibition performance of the tannin. At high pH, the oligomer structure of the tannin was affected, resulting in a low PG (4) and high zeta potential (−75 mV), and consequently, the inhibition efficiency decreased (68%) in comparison with that in acid (99%) and neutral media (96%). The values obtained indicate a physisorption mechanism for the aluminum corrosion inhibition in the studied conditions.     

我国典型地区产业结构演进探析——以徐州为例

徐州作为全国较大的市,人均GDP接近全国水平,产业结构在国内也颇具典型性。改革开放以来,徐州的产业结构演进符合全国发展的一般规律。本文通过实证与规范分析,结合相关理论,逐一验证了经济的发展阶段,并以徐州为范例,提出了结构创新及主导产业战略选择的一般原则。     

俄罗斯矿产资源开发利用及矿业投资环境

中国经济的发展需要有充足的矿产资源作保障，但是一些需求量大的战略性矿产的供给能力已显现出一定程度的不足，为了保障经济的稳定运行，应该加大对外国资源的利用。俄罗斯矿产资源丰富，与中国关系良好稳定，可以作为境外矿业投资的参考地。     

以“新发展理念”引领地勘行业持续健康发展

"十二五"以来,地勘行业在服务和支撑经济社会发展中的地位与作用越发凸显。"十三五"时期是全面建成小康社会的决胜时期,地勘行业面临一系列的机遇与挑战。本文在总结"十二五"地勘行业发展成效的基础上,深入分析全面建成小康社会决胜阶段地勘行业面临的新形势、新要求,提出以创新发展激发地勘行业发展新动力、形成地勘行业发展协调新格局、探索地勘行业绿色发展新模式、开拓地勘行业开放发展新空间、最终共享地勘行业发展新成果的建议。     

上海的支柱产业——房地产业浅析

上海房地产业已具备了成为国民经济支柱产业的必要条件。选择房地产业作为支柱产业的基本依据即发展上海房地产业符合产业结构演进的方向 ,有利于结构优化升级 ,更好地推动现代化国际大都市的建设和管理 ,促进和带动相关产业的兴起和经济的快速发展 ,有助于提高市民居住水平。     

基于灰色系统理论的资源型城市主导产业选择

以现有研究成果为基础,建立了资源型城市主导产业评价指标体系。基于灰色聚类的思想,采用主导产业优度的数学模型———定权聚类评估模型对辽宁省阜新市主导产业选择进行了实证分析。     

林业城市伊春的经济转型探讨

资源型城市在中国经济发展过程中起着重大作用,但是长期受计划经济体制的影响及长期的历史积累,资源型城市面临着资源衰竭、生态环境恶化、经济和产业结构单一、就业压力大、生活水平下降等许多矛盾和困难。本文以伊春为例,通过分析伊春市资源现状和经济发展中存在的问题．结合循环经济理论．提出资源型城市——伊春经济转型的思路。     

工字形铝合金偏心压杆平面外稳定承载力研究

运用ANSYS软件对工字形铝合金偏心压杆平面外稳定承载力进行了研究,分别讨论初弯曲、残余应力和截面厚度偏差等缺陷对杆件平面外稳定承载力的影响,提出稳定系数曲面的概念,指出平面外稳定系数是相对偏心率e′和相对长细比λ的二元函数,在空间上为一连续的曲面。并对不同截面尺寸杆件的平面外稳定系数进行大量计算分析,以此为基础拟合出了平面外稳定系数曲面=f(λ,e′)的函数表达式,可供设计参考。