炼钢厂生产管理信息系统的设计与实现

炼钢厂生产管理信息系统包括制造命令管理子系统、生产辅助管理子系统和工艺质量管理子系统.本文从软件工程理论出发,围绕数据库应用系统的开发,结合制造命令管理子系统的具体实现,主要介绍了生产管理系统在Oracle Developer中的设计思想及开发方法.     

丹宁酸对锌电解电流效率的影响

对存在于硫酸锌溶液中的丹宁酸有机物对锌电解电流效率的影响进行了试验研究,结合生产实际对建矿以来工业生产中有关锌电解电流效率的相关数据进行分析,认为存在于硫酸锌溶液中的丹宁酸有机物极易在氧化介质和高温环境中被破坏除去,不会对锌电解造成危害和降低锌电解电流效率。     

铸轧带坯晶粒粗大的原因分析及对策

金属结晶时晶粒的大小取决于体积形核率和晶体表面长大线速度的相对大小,形核率与长大线速度的大小主要取决于液相的过冷度。根据影响晶粒度大小的因素分析铸轧带坯产生粗大晶粒的主要原因,提出了控制和细化铸轧带坯晶粒度的对策。     

320MPa级高强度船板表面微裂纹形成原因的分析

采用金相、扫描电镜对320 MPa级高强度船板表面微裂纹的形成原因进行了研究,发现铸坯表面微裂纹是造成板材表面微裂纹的主要原因,并进一步分析了铸坯表面微裂纹的成因。通过铸坯冷、热装对比试验,指出采取堆垛缓冷的措施可以有效降低板材表面微裂纹的产生。     

热轧钢材氧化铁皮控制技术的最新进展

介绍了热轧氧化铁皮控制技术发展情况。结合实验室热轧氧化铁皮厚度与结构演变的研究结果,对热轧钢材氧化铁皮控制技术的最新进展和应用进行了阐述。提出了针对热轧高强钢后续加工特点的氧化铁皮的柔性化控制技术。初步明确了热轧钢板表面氧化铁皮结构对钢板耐候性能的影响规律。     

Local Proactive Interference in Delayed Matching to Sample: The Role of Reinforcement.

Discriminability in delayed matching to sample was lower when the samples on consecutive trials differed compared with when samples on consecutive trials were the same. This local proactive interference occurred when correct choices on the previous trial were reinforced but not when correct choices on the previous trial were not reinforced. When the choice on the previous trial was incorrect, discriminability was higher on different consecutive trials than on same trials. These effects were amplified by varying the ratio of reinforcers for correct choices, as predicted by a model that attributes local proactive interference to an interaction between control by the sample on the current trial and the influence of reinforcers for correct choices on previous trials. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

连铸板坯纵向开裂成因分析

本文通过对连铸板坯纵向裂纹进行组织观察、裂纹扩展及材料热模拟试验，结合实际生产工艺，分析了板坯纵向裂纹产生的原因，提出了改善板坯纵向裂纹的措施。     

热轧带钢头尾宽度模型控制优化

从带钢头尾宽度的工艺原理出发,从工艺、现场、设备特点及控制原理等方面对短行程控制(SSC)进行了分析,并针对太钢产品的实际特点,研究出不同种类的控制曲线,取得了明显效果。     

连铸矫直过程板坯角部横向裂纹数值分析

 连铸过程中板坯角部可能出现横向裂纹,这些裂纹严重影响着连铸坯的质量和产量。本文采用显式动力学有限元方法对连铸矫直阶段连铸板坯表层金属应力变化规律进行了模拟,分析了角部应力的变化规律,并对矫直过程中连铸板坯应力分布对角部横向裂纹的影响进行了讨论。研究结果对指导连铸生产具有重要的实际意义和理论意义。     

Traditional tests and job simulations: Minority and majority performance and test validities.

Performance of 565 minority and 414 majority job applicants on traditional paper-and-pencil tests and on a telephone simulation that measured similar constructs was assessed. Models of the measurement characteristics of these 2 test batteries indicated larger subgroup mean differences on the traditional tests than on the simulation. Correlations between traditional tests were lower in the majority sample than in the minority sample, and the variance of the minority candidates' scores on the traditional tests was much larger than the variance of majority applicants' scores on the same measures. The validity of the simulation was lower than the validity of the traditional tests. This study replicates previous laboratory research that has indicated smaller subgroup differences on simulations than on paper-and-pencil tests and extends this research by providing evidence of the relative validity of these 2 types of measures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)