CS1000在天铁烧结生产过程控制中的应用

结合天津铁厂烧结分厂二烧车间烧结过程控制的具体情况,介绍了分散型控制系统在烧结生产上的应用以及数据网上发布的一种方法。     

基于二次模板匹配的防松垫片安装机器视觉检测

介绍了基于二次模板匹配的数字图像处理技术在实时检测防松垫片安装过程中的应用.在生产现场采用CCD摄像机和台式电脑,对采集的图像进行预处理、一次模板匹配、图像调整,再次模板匹配的方法,成功地屏蔽了工厂复杂环境的不良影响,实现了对防松垫片手工安装质量的自动检测.实验证明,该系统有很高的实用性和高效性.     

离心喷雾干燥机泄漏治理

对离心喷雾干燥机操作中出现的泄漏问题进行了分析和治理，其结果满足生产要求。     

State of workability design technology for fresh concrete in Japan

As high-performance concrete and various new types of concrete, such as self-compacting concrete and anti-washout underwater concrete, have been developed and put to practical use, it has become increasingly important to optimize the consistency of fresh concrete to attain high-quality and efficient concrete construction, which is called workability design of concrete. Up to the present, many scientists from all parts of the world have performed a lot of studies on the rheological properties, test method, and flow analysis of fresh concrete for realizing the workability design under various construction conditions. This paper gives a brief outline of the current situation, problems and prospects in the art of workability design of fresh concrete in Japan.     

考虑接头几何参数的I-core全钢三明治板的刚度分析

激光焊接I-core三明治板常用的刚度设计公式,没有考虑接头几何参数的影响,在实际应用中其准确性受到影响. 通过外伸三点弯曲试验,对六种接头几何参数的I-core全钢三明治板的弯曲刚度和剪切刚度进行测量,并结合有限元计算,分析了接头几何参数对弯曲刚度和剪切刚度的影响. 结果表明,增加焊缝宽度可显著提高弯曲刚度和剪切刚度,而焊缝宽度大于60%芯板厚度后,焊缝宽度对刚度的影响减小. 间隙对刚度的影响可忽略.基于此结果,对三明治板设计时常用的刚度公式进行了修正.     

城市规划:公共利益、公众参与和权利救济--兼论修订《中华人民共和国城市规划法》

城市规划的目的是公共利益,必须杜绝私益介入.对于具体规划如何确定为公共利益以及解决与公民权利的冲突,最重要的途径是存在一个公众参与的正当程序,这也是保护公民合法权利,监督行政权运行所必需的,但是现行<中华人民共和国城市规划法>对此几乎一片空白.另外,该法对于违法城市规划以及实施城市规划的违法具体行政行为,也没有规定救济途径,这也使得人们当前在讨论修订<城市规划法>时不能不对此予以关注.     

Strengthening behavior analysis of weld metal of laser hybrid welding for microalloyed steel

The weld metal with high strength and good toughness was obtained for medium thickness microalloyed steel by using high power laser hybrid welding technology. Mechanical properties of weld metal were evaluated by using room temperature tensile test and low temperature three-side Charpy V-notch (CVN) impact test. The results show that the yield strength and ultimate tensile strength of weld metal are up to 713 MPa and 918 MPa, respectively. Both of them are almost 1.5 times higher than those of base metal. Under the strict three sides CVN condition, the −40 °C low temperature impact absorbed energy is up to 32 J and also higher than that of base metal. Weld metal predominately consists of granular bainite and carbon-free bainite. Both of them mainly contain lath morphology bainitic ferrite. The lath morphology bainitic ferrite with fine grain size plays an important role in higher strength. Dispersive carbide and high density dislocation are found in strengthening weld metal.     

Nitrogen plasma-implanted titanium as bipolar plates in polymer electrolyte membrane fuel cells

Nitrogen plasma immersion ion implantation (PIII), a non-line-of-sight surface treatment technique suitable for bipolar plates in polymer electrolyte membrane fuel cells, is conducted at low and high temperature to improve the corrosion resistance and conductivity of titanium sheets. X-ray photoelectron spectroscopy (XPS) shows that high-temperature (HT) nitrogen PIII produces a thick oxy-nitride layer on the titanium surface. This layer which provides good corrosion resistance and high electrical conductivity as verified by electrochemical tests, inductively coupled plasma optical emission spectroscopy, and interfacial contact resistance (ICR) measurements renders the materials suitable for polymer electrolyte membrane fuel cells. In comparison, the low-temperature (LT) PIII titanium sample exhibits poorer corrosion resistance and electrical conductivity than the untreated titanium control.     

不同Ti／Ba摩尔比的钛酸钡纳米晶粉体的Sol—gel法制备与表征

采用Ｓｏｌ－ｇｅｌ法制备了不同Ｔｉ／Ｂａ摩尔比的ＢａｙＴｉｘＯ３（ｘ／ｙ＝０．９９０,１．０００,１．０１０,１．０２０,１．０４５）纳米晶粉体。应用热分析、Ｘ射线粉末衍射、激光和透射电镜等技术对干凝胶热分解历程和粉体性能进行了研究,发现随Ｔｉ／Ｂａ摩尔比的增加,粉体的平均晶粒尺寸、晶体结构和粉体粒度分布各呈现规律性变化。本文并对这些规律性变化进行了初步讨论     

利用分步沉积法实现非铁磁性磨屑自动识别的研究

本文介绍了一种结合磁化液的使用将同一个油样中的铁磁性磨屑和非铁磁性磨屑分别沉积在不同谱片上的分步沉积法，并给出了该法的理论依据，且通过实验证明了该法在实际应用中的可行性。该法的提出成功地解决了利用计算机对谱片进行分析时，在磨屑材质识别方面的难题。