石钢在线无损检测技术应用与改进

介绍了石钢公司在线无损检测中应用的相控阵超声和阵列涡流检测原理,分析了这两种技术在实际检测中遇到的问题。通过对设备进行校准、控制噪声、重复性改进,提高了在线无损检测的准确度,为提高石钢产品出厂质量提供了保障。     

金属锅炉焊接过程中无损检测技术应用研究

由于无损检测技术在金属锅炉焊接应用过程中的应用存在一些缺陷,为了保证金属锅炉焊接工作的整体质量,提出了金属锅炉焊接过程中无损检测技术应用研究。通过对无损检测技术进行详细分析,发现无损检测技术在金属锅炉焊接过程中可以检测金属锅炉材料在材质方面的缺陷,还可以检测金属锅炉焊接过程中存在的宏观缺陷和微观缺陷,提高了金属锅炉焊接工作的整体质量。     

金属材料超声无损检测技术应用研究

为了提高石油工业装备检测水平,促使石油生产工业健康、可持续发展,现提出一套行之有效的金属材料超声无损检测技术应用方案。首先,针对超声无损检测技术、算法与研究概况,研究了连续波透射法、共振法、脉冲反射法、脉冲透射法四种超声无损检测方法。其次,从灵活选择超声无损检测技术方法、在对的时间段内实施无损检测工作、对超声无损检测方式加以升级等方面入手,将超声无损检测技术科学地应用到石油行业金属材料中。结果表明：本文所提出的超声无损检测技术应用方案具有较高的可靠性和可行性,不仅可以精确化检测石油行业金属材料内部缺陷,还能实现对材料微观部分的精细化检查,有效地提高了金属材料把控质量。希望通过这次研究,为相关人员提供有效的借鉴和参考。     

中国有色总公司无损检测技术工作会议

4月1日在宝鸡由总公司军工处主持召开了中国有色总公司无损检测技术工作会议。参加会议的有总公司所属研究院、所以及有色金属加工厂的主管无损检测行政,技术的领导同志以及工程技术人员。会议分析了有色冶金系统的无损检测工作的现状,总结了多年来在无损检测技术的     

无损检测技术在机械焊接结构中的应用

基于采用无损检测对于机械焊接结构的重要性,分析机械焊接机构存在的缺陷,探讨射线无损检测、超声波检测、全息探测检测等无损检测技术在机械焊接结构中的应用。与传统的检测技术相比,无损检测技术可保证焊接结构的安全性和完整性,提高检测效率。     

数字超声波探伤扫描技术在锅炉检测中的应用

数字超声波探伤扫描技术能得到断面上的二维信息及被检测物体缺陷三维空间结构,其断层图像的三维重建在工业无损探伤的领域有着极其重要的实用价值和研究意义。通过典型的超声波无损探伤实例,阐述了超声波无损检测在锅炉检测中的应用原理,说明了超声波无损检测的基本步骤,总结出了其检测的优缺点。     

无损检测技术可靠性的探讨

本文对无损检测技术可靠性进行探讨,分析了无损检测技术可靠性的真正含义,论述了可靠性对产品质量的影响,分析了影响可靠性的因素,增加无损检测的可靠性措施,提高了产品质量检测的可靠性.     

特种设备检验中无损检测技术的应用

无损检测是提高特种设备制造质量,保证其使用安全的重要手段。文章从无损检测技术的特点入手,探讨了射线检测技术、超声检测技术、红外检测技术、磁粉检测技术在特种设备检验中的应用,并提出了具体的发展对策。     

中国有色金属总公司第二届无损检测工作会议

今年4月20日中国有色金属总公司军工处在上海主持召开了第二届中国有色金属总公司无损检测工作会议。参加会议的有中国有色金属总公司所属研究院,所,有色金属加工厂主管无损检测的行政、技术领导同志以及工程技术人员。会议期间,各单位介绍了自第一届工作会议以来,在无损检测技术的管理和应用、无损检测人员的培训、技术装备的开发等方面所取得的经验。它展示了我国有色冶金系     

高炉炉衬厚度检测技术

对几种典型高炉炉衬厚度检测技术的原理、设备及应用状况等进行了介绍,通过综合比较和评价,指出高炉炉衬无损检测技术的未来发展趋势应为不同无损检测技术的综合应用。     

使用C语言指针的几个常见错误及纠正方法

指针是C语言的精髓部分,也是C语言的重要特色.正确而灵活地运用它可以有效地表示复杂的数据结构;能动态分配内存;能够方便地使用字符串;有效而方便地使用数组;在调用函数时能够得到多于一个值;能直接处理内存地址等.     

金刚石有序排列对锯片性能的影响

排布方式合理的有序排列金刚石锯片能明显提高锋利性,增加寿命。试验采用2片无序排列锯片和4片有序排列锯片切割混凝土,不同排布方式的锯片切割性能有很大的差异。介绍了有序排列锯片制作的工艺流程,并且从理论上分析了排布参数对切割性能的影响,提出横向间距和纵向间距是有序排列方式设计中最重要的两个参数。     

平面型线圈阵列电涡流传感器阻抗分析

炼钢生产过程中,结晶器钢水液位和炉渣厚度的动态测量对生产高质量钢至关重要,采用电涡流传感器测量钢水液位和渣层厚度具有很多优点。对电涡流传感器的阻抗分析是设计电涡流测量系统的基石。本文以炼钢过程中结晶器钢水液面和渣层厚度分布测量为研究对象,采用平面型线圈阵列传感器,通过建立三维电磁场物理模型并用数值计算的方法求解电磁场,...     

Lower region: A new cue for figure-ground assignment.

Figure-ground assignment is an important visual process; humans recognize, attend to, and act on figures, not backgrounds. There are many visual cues for figure-ground assignment. A new cue to figure-ground assignment, called lower region, is presented: Regions in the lower portion of a stimulus array appear more figurelike than regions in the upper portion of the display. This phenomenon was explored, and it was demonstrated that the lower-region preference is not influenced by contrast, eye movements, or voluntary spatial attention. It was found that the lower region is defined relative to the stimulus display, linking the lower-region preference to pictorial depth perception cues. The results are discussed in terms of the environmental regularities that this new figure-ground cue may reflect. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reorienting strategies in a rectangular array of landmarks by domestic chicks (gallus gallus).

Spatial reorientation in a rectangular array of four landmarks located in the center of a circular enclosure was investigated in domestic chicks (Gallus gallus). One of the landmark possessed unique visual features, indicating the location of a food reward. After training, chicks were tested (a) with the same array as during the training; (b) with four identical landmarks of the type previously nonrewarded, of the type previously rewarded, or of a new type; (c) after having transformed one of the landmarks located at the geometric incorrect location into the type of landmark previously rewarded; or (d) with a fifth landmark of the rewarded type at a new location. Chicks encoded information provided by local featural cues but not the geometric information provided by the shape of the array. Moreover, when trained in a rectangular array of identical landmarks chicks failed to reorient. In a second series of experiments, the array was located in correspondence to the corners of a rectangular enclosure. This time chicks successfully learned to locate the reward using geometric information. However, when the rectangular array was located in the center of a larger rectangular enclosure, chicks failed to reorient, indicating that the geometric information given by the macroscopic layout of arena surfaces was not used to specify different locations. These results suggest that chicks reorient on the basis of a local representation of single landmarks and that encoding of the global aspects of geometry only occurs with respect to the large, extended surfaces of an enclosure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A model for stimulus generalization in Pavlovian conditioning.

Presents a review of experiments that demonstrate the effects of generalization decrement in Pavlovian conditioning and argues that an adequate theoretical explanation for them is currently not available. A theoretical account for the processes of generalization and generalization decrement in Pavlovian conditioning is developed. This model assumes that animals represent their environment by a stimulus array in a buffer and that this array in its entirety constitutes the conditioned stimulus/stimuli (CS). Generalization occurs when some stimuli represented in the array on a test trial are the same as some of those represented in the array during training; the magnitude of generalization is determined by the proportion of the array occupied by these common stimuli during training compared with the proportion of the array they occupy during testing. It is proposed that this model can explain all the results that were difficult for its predecessors to account for. (52 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

宽孔距、小排距爆破技术在大黑山钼矿的应用

爆破参数优化对露天矿山开采十分重要.针对大黑山钼矿开采技术条件及开采中爆能损失大、大块率高等问题,开展了露天爆破参数优化试验研究.介绍了宽孔距、小排距深孔爆破机理和技术特点以及爆破参数优化设计.宽孔距、小排距爆破技术应用表明,露天爆堆集中,无根底、无后冲,易于铲装,铲装效率提高10%;大块明显减少,大块率下降5个百分点...     

电容法检测高炉炉衬侵蚀状况的仿真研究

提出了一各利用安装在高炉炉衬外表面的多极板电这价值叫骂在阵列检测高炉炉衬侵蚀状况的新方法。有限元仿真研究结果表明,炉衬的侵蚀状况与传感器的输出值密度相关。该方法可为高炉炉衬侵蚀状况的监测提供一种牢固可靠、非侵入式的新手段。     

A Message-array-based Mechanism for Tracking Control Effects in Supervisory Control Software

Supervisory control is a very popular paradigm for computer-controlled systems.Knowledge and tracking the control effect of every control operation is crucial to the control tasks.In the paper,we present a message-array-based mechanism to track control effects in supervisory control software.A novel data type,message array,is designed to efficiently support this tracking mechanism.The operation algorithms,adding algorithm(AA),removing algorithm(FtA),and scheduler algorithm(SA)are proposed to operate the tracking messages in message array,which forms the special first input Ⅹ output(FIXO)strategy of message array.Automatically tracking,recording,and rolling back are the characteristics of our tracking mechanism.We implement this messagearray-based mechanism on the famous human machine interface(HMI)software platform-proficy iFix,and construct experiments to evaluate the performance of the mechanism in various cases.The results show our mechanism can be well satisfied with supervisory control software.     

相控阵技术在爆炸焊接钛/钢复合板检测中的应用

国内某化工项目使用爆炸焊接钛/钢复合板,除了对结合性能有高于标准要求的指标外,对界面结合的均匀性也提出要求.目前,对界面结合均匀性的判定采用常规的超声脉冲回波法难以实现,采用常规超声C扫检测速度较慢,无法满足大批量的生产进度要求.国内首次将相控阵技术应用到爆炸焊接层状金属复合板产品检测和验收中.相控阵检测通过电子扫查技...