常化辊印的形成及预防

本文剖析了舞钢常化炉现状、工艺温度、炉内气氛等对炉底辊的影响以及常化辊印的产生,制定了措施,减少常化辊印.     

高压上浆工艺应用中有关问题的研讨

分析高压上浆中上浆率与浆纱覆盖率的关系，指出覆盖率达到70％使用双浆槽为宜；压浆辊硬度要保证挤压宽度能兼顾浆液浸透与被覆，其对上浆率的影响决定于挤压强度与挤压时间的综合效果；压出加重率要和压浆力共同作为高压上浆的标志，由浆出定量经纱耗用的浆液量进行测算较为准确。     

采用附加网络改善速调管脉冲电压波形——±0.2%平坦度的实现

一、引言在电子直线加速器中,速调管脉冲电压顶部平坦度对电子束能谱起着重要作用。脉冲电压变化引起的微波相位调制可表示为:     

不同直径双晶C/O仪器的响应特征比较

研究不同直径C/O测井仪器的测井响应，可以发现它们之间的优势和缺点，为仪器的研制提供参考。采用Monte Carlo方法，在孔隙度为20%的砂岩地层中，对直径为89 mm、54 mm和43 mm三种C/O仪器的测井响应进行了计算，得到了各直径仪器C/O值随源距的变化关系。经过数据处理和分析认为：大直径仪器受井眼影响最小，短源距不能对长源距起到有效的补偿作用；中等直径仪器区分地层能力最强；小直径仪器受井眼的影响最严重，其短源距能有效地对长源距起补偿作用。     

化学成分对冷拔轧螺纹钢丝轧辊寿命的影响

化学成分的偏差，造成９ＳｉＣｒ钢制螺纹钢丝冷轧辊崩刃，断裂早期失效。本文分析了由于Ｓｉ元素含量的不足，引起９ＳｉＣｒ钢的组织变化及由此对轧辊寿命的影响。     

2号初轧机轧辊锯齿型磨损产生原因及机理分析

宝钢条钢厂2号初轧机轧辊的锯齿型磨损对辊耗、钢坯质量有一定的影响。本文试分析了该锯齿型磨损的产生原因及产生机理，并在实践中进行了验证。     

提高坦克齿轮弯曲强度的新途径

该文指出改进设计齿轮刀具的刀顶形状是提高坦克齿轮弯曲强度的一种有效的新途径。通过对五九式坦克齿轮传动装置中几个重要齿轮的边界元计算表明,采用该方法加工获得的齿轮较现有普通齿轮齿根弯曲应力降低12～22％。该结果得到了光弹性实验的验证。     

Distance transform algorithm for measuring nanofiber diameter

This paper describes a new distance transform method used for measuring fiber diameter in electrospun nanofiber webs. In this algorithm, the effect of intersection is eliminated, which brings more accuracy to the measurement. The method is tested by a series of simulated images with known characteristics as well as some real webs obtained from electrospinning of PVA. Our method is compared with the distance transform method. The results obtained by our method were significantly better than the distance transform, indicating that the new method could successfully be used to measure electrospun fiber diameter.     

列车圆柱滚动轴承内外圈的配合和原始径向游隙对运行安全的影响

针对我国目前在列车中使用的圆柱滚动轴承与轮轴及座孔配合中的问题及其目前实践中采用的原始径向游隙的合理性进行了分析，并提出原始径向游隙的取值，不应一概而论，应随车速、载荷和原始配合大小而取不同值。     

Global and local mixing determinations for steel converter analysis

The steel converter is one of the major multiphase industrial reactors in which mixing plays an important role. The molten steel in the converter is mixed with the slag by introducing a gas that is blown over the liquid phases (called top blowing), under the liquid phases (bottom blowing) or using top and bottom blowing at the same time (combined blowing). Many chemical reactions that are controlled by the mixing and temperature magnitudes take place inside the converter. All the processes take about 14 min, the first 3 min being for the addition of materials. A 1/10 length scale down of a cold model of a 250-ton capacity industrial converter was employed to carry out the present study. A conductivimetric method was used to carry out the study of the mixing in the reactor. In this study, the mixing in the bath was determined for the three blowing types by conductimetry and the behaviour of the system was modelized.