GCK—Ⅱ光电测宽仪：用CCD改造引进的二手测宽仪

本文介绍了用电荷耦合器件（ＣＣＤ）改造引进的日本二手测宽仪，并已用于太钢连轧生产现场，取得了良好的效果。     

三辊轧机板坯测宽仪的研制

介绍三辊轧机板坯测宽仪的研制过程。利用ＣＣＤ固体摄像机空间摄影技术，采集处于三维运动中的钢坯图像，经计算机软件处理，得到准确的板坯宽度。应用于生产，可获得较好的经济效益。     

杭钢热带厂应用光电测宽仪

杭钢热带厂应用JGC－K3B光电测宽仪，在线测量窄带钢宽度，提高了带钢宽度的控制精度，杜绝了宽度超差的质量事故。介绍该光电测宽仪的性能特点和使用效果。     

高精度厚钢板测宽仪

在轧制厚板时,由于钢坯加热条件的不同,使钢板边部形状变得复杂,原来的厚板测宽仪不够精确而影响成材率的提高。日本住友金属公司等单位研制出厚板用高精度激光测宽仪。测定原理是采用150MHz变频激光束发射到钢板侧面,根据其返回     

测宽仪常见问题及分析

简要介绍了加拿大KELK公司Accuband测宽仪使用的三种技术:边部的确定、三角测量以及过滤;列出并分析了影响测量的因素;给出了扫描器的物理测量过程和相应的界面显示;举出了常见的问题并给出具体的图像,对测量图像进行了分析,并给出了解决的方法和建议。     

多通道CCD冷轧板材在线测宽仪

对薄型宽板裁剪成多条窄板的多通道并联实时测量是冶金和轻工业等领域中急待解决的问题。目前多通道在线测宽技术国内外尚未见报道。作者对此进行了探讨，提出了整个系统的设计思想及方案。测宽仪测量精度为±０．１５ｍｍ，响应时间为０．０１ｓ，在同类型仪器中处于先进水平。     

激光测宽仪的应用

在热轧中厚板生产过程中,用人工卡量等方式来测量板材的宽度值存在着测量精度差、测量点少的缺点,难以作为控制板材宽度的准确信息,并且工人劳动强度大、工作环境恶劣、测量速度慢,因此热轧钢板生产中的实时在线宽度测量是亟待解决的问题之一。JGC-K1A型激光测宽仪是用于热轧生产线在线连续测量板材宽度的非接触式精密测量设备,它克服了常规测量方式的缺陷,具有安全可靠、测量准确、实用性强和无辐射危害等独特的优点,可有效地改善测试环境。为宽度控制提供准确的测量信息,提高生产效率、提高成材率和产品质量。可以为自动轧钢AGC控制提供可靠的宽度参数。     

线型绿激光测宽仪

专利号：200720085494．3专利权人：武汉钢铁（集团）公司本实用新型涉及一种线型绿激光测宽仪,由绿色线型激光器、成像镜头、面阵CCD、千兆网通讯器及计算机构成,其特点是：将绿色线型激光器和成像镜头平行设置在被测物体的上方,成像镜头的聚焦面与线型激光发射器的投影区相对应,成像镜头的输出输入至面阵CCD中,面阵CCD的输出通过千兆网通讯器和千兆网线与计算机相连接。     

炉前测宽仪整改及优化

炉前测宽仪为后续宽度校核和宽度控制提供关键数据。针对2250热轧板厂炉前测宽仪检测精度低的问题,通过仪表辅助光源备件更换、宽度冷热值转换系数优化及温度采用值优化3个方面的工作,对炉前测宽仪进行整改与优化,使得宽度测量值偏差和长度测量偏差在允许偏差范围内的命中率均达到96%以上。大大提升了仪表的检测精度,进而满足后续工序功能应用的精度要求,对生产实际具有积极的现实意义。     

Concept-Based Method for Extracting Valid Subsets from an EXPRESS Schema

An EXPRESS schema is a data schema defined in EXPRESS, an international standard language for defining product data schemas. This technical paper proposes and formally defines a set of conditions for generating a minimum valid subset of an EXPRESS schema corresponding to a concept, where a concept is a general idea and a subset is a partial model of a data schema. We introduce a notion of “minimal set” to define the relationships between a subset and other subsets, and also between a subset and concepts. A minimal set is the smallest complete subset of a schema that corresponds to a concept. Using IFC, an international standard data model for the architecture, engineering, and construction industry, the proposed conditions have been implemented in a software application developed for extracting subsets from the IFC schema matching the concepts. A number of examples are demonstrated.     

Postprocessing the Hybrid Method for Addressing Uncertainty in Risk Assessments

In a previous paper in this Journal, a “hybrid method” was proposed for the joint propagation of probability distributions (expressing variability) and possibility distributions (i.e., fuzzy numbers, expressing imprecision or partial ignorance) in the computation of risk. In order to compare the results of the hybrid computation (a random fuzzy set) to a tolerance threshold (a tolerable level of risk), a postprocessing method was proposed. Recent work has highlighted a shortcoming of this postprocessing step which yields overly conservative results. A postprocessing method based on Shafer’s theory of evidence provides a rigorous answer to the problem of comparing a random fuzzy set with a threshold. The principles behind the new postprocessing scheme are presented and illustrated with a synthetic example.     

The Principles of Conventionality and Contrast in Word Learning: An Empirical Examination.

In Study 1, 4-year-olds avoided 2 names for an object when exposed to a common or a proper noun in a puppet's presence or to a common noun in a puppet's absence, but not when exposed to a proper noun in a puppet's absence. In Study 2, 3-year-olds avoided 2 names for an object when the requester for the referent of a second label in a different language was bilingual and present during naming, but not when the speaker was bilingual but absent or monolingual. Study 3 followed up on the results of the first 2 studies. When children could assume that the puppet knew the name the experimenter used, they inferred that the puppet's use of a different name implied a different referential intent. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

When danger lurks in the background: Attentional capture by animal fear-relevant distractors is specific and selectively enhanced by animal fear.

Across 2 experiments, a new experimental procedure was used to investigate attentional capture by animal fear-relevant stimuli. In Experiment 1 (N = 34), unselected participants were slower to detect a neutral target animal in the presence of a spider than a cockroach distractor and in the presence of a snake than a large lizard distractor. This result confirms that phylogenetically fear-relevant animals capture attention specifically and to a larger extent than do non-fear-relevant animals. In Experiment 2 (N = 86), detection of a neutral target animal was slowed more in the presence of a feared fear-relevant distractor (e.g., a snake for snake-fearful participants) than in presence of a not-feared fear-relevant distractor (e.g., a spider for snake-fearful participants). These results indicate preferential attentional capture that is specific to phylogenetically fear-relevant stimuli and is selectively enhanced in individuals who fear these animals. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Hedratecture and Expandable Platform

This paper is directed only to the basic aspects of hedratecture. The word hedratecture is derived from the Greek “to build with hedrons.” It is used to describe the art and science of constructing with framed elements that are hedron‐shaped, usually in the form of the five convex polyhedrons. Hedratecture encompasses two major elements: the expandable platform and structures thereon. The platform when set on a surface by computer has the capability to incorporate within itself a whole variety of integrated lesser structures that provide dwelling units and a modular internal transportation system. The platform can be placed in a designated area as a hedron city or expanded in a linear dimension and in that mode it becomes a trestle or a bridge. The basic elements provide an endless variety of shapes with uses that vary from a small helicopter pad to a small city on earth. When placed on the Moon or Mars it can provide a telerobotically placed base.     

The Motivating Impact of Informing Women Smokers of a Link Between Smoking and Cervical Cancer: The Role of Coherence.

This research assessed the role of having a coherent explanation of the link between smoking and cervical cancer in motivating women to stop smoking. In the 1st study, women were given a leaflet with either a detailed or a minimal explanation of the link or no leaflet. The leaflets were similarly effective at providing a coherent explanation. In a cross-sectional analysis, having a coherent explanation moderated the relationship between perceived vulnerability and intention: Higher perceived vulnerability to cervical cancer was associated with greater intention to quit smoking only amongst women with a more coherent explanation of the link between smoking and cervical cancer. This rinding was replicated in a 2nd study. These results are consistent with H. Leventhal et al.'s (1997) self-regulatory model, which suggests that motivation to change behavior depends not only on perceiving a threat but also on having a coherent model linking the behavior with the threat. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Membrane Micro Air Vehicles with Adaptive Aerodynamic Twist: Numerical Modeling

Micro air vehicles are typically characterized by a low aspect ratio wing operating at low Reynolds numbers (104): aerodynamics involve a three-dimensional flow field with numerous regions of separated flow. Furthermore, aerodynamic twist can be built into the wing through the use of a thin membrane skin, to adaptively increase the wing camber. This work formulates a static aeroelastic model of such a wing, by coupling a linear membrane model to a well-validated steady laminar Navier–Stokes solver. The membrane deformation causes a significant pressure redistribution which increases lift and longitudinal static stability, though a drag penalty also develops. The efficiency of a rigid wing increases with Reynolds number, but decreases for a membrane wing, as the deformation generally provides a nonoptimal airfoil shape. Membrane deformation leads to larger separation bubbles, and acts as a barrier to the tip vortex formation. At high angles of attack, the aerodynamic twist causes a direct interaction between the recirculating flow and the tip vortices, indicating potential roll instabilities.     

Context- but not familiarity-dependent forms of object recognition are impaired following excitotoxic hippocampal lesions in rats.

Dual-process models of recognition memory in animals propose that recognition memory is supported by two independent processes that reflect the operation of distinct brain structures: a familiarity process that operates independently of the hippocampus and a context-dependent (episodic) memory process that is dependent on the hippocampus. A novel variant of an object recognition procedure was used to examine this proposal. Healthy rats showed a preference for exploring a novel object rather than a familiar object: a familiarity-dependent recognition effect. They also showed a preference for exploring a familiar object that was presented in a different spatiotemporal context rather than a familiar object that was presented either in a different spatial or temporal context: a context-dependent form of recognition that is sensitive to "what" object has been presented "where" and "when." Rats with excitotoxic hippocampal lesions showed the familiarity-dependent but not the context-dependent form of recognition. The results provide support for dual-process theories of recognition memory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Transit-Time Design for Diffusion through Composite Liners

Transit-time design methods are presented in this paper for determining the design thickness for composite liners consisting of a geomembrane and a compacted soil liner or geosynthetic clay liner. The design methods are based on a closed-form analytical solution for transient solute diffusion of volatile organic compounds in a composite liner and results from a numerical model. An analytical solution for diffusion in a two-layer soil profile, which is useful for transit-time design of composite liners, is also presented. The analytical solutions are used to develop graphical solution charts that can be used to design composite liners for which the effluent concentration and contaminant flux are less than a specified value. Design examples are included for a composite liner having a compacted soil liner and a composite liner having a geosynthetic clay liner. The method is relatively simple to apply and can be used for preliminary design of composite liners, evaluating experimental results, and verifying more complex numerical models.