Design selection for strong orthogonal arrays

Strong orthogonal arrays (SOAs) were recently introduced and studied as a class of space‐filling designs for computer experiments. An important problem that has not been addressed in the literature is that of design selection for such arrays. In this article, we conduct a systematic investigation into this problem, and we focus on the most useful SOA(n,m,4,2 + )s and SOA(n,m,4,2)s. This article first addresses the problem of design selection for SOAs of strength 2+ by examining their three‐dimensional projections. Both theoretical and computational results are presented. When SOAs of strength 2+ do not exist, we formulate a general framework for the selection of SOAs of strength 2 by looking at their two‐dimensional projections. The approach is fruitful, as it is applicable when SOAs of strength 2+ do not exist and it gives rise to them when they do. The Canadian Journal of Statistics 47: 302–314; 2019 © 2019 Statistical Society of Canada     

间接挤压铸造浇口形状对充型形态的影响

在间接挤压铸造过程中,充型液面的稳定性是铸件质量的保证。以平板铸件为研究对象,利用专业铸造软件 ProCAST进行数值模拟,分析了不同浇口形状与液面稳定性的关系。结果表明：带扩张角的浇道充型效果明显优于直浇 道,且随着扩张角的增大,其充型形态越平稳,液面凸起也越小;双浇道的浇注系统其充型效果不佳,液面波动加剧。     

劳伦斯笔下的反面男性形象和他们失败的爱情

英国现代主义作家劳伦斯塑造了一系列性格各异的男性形象。本文从分析劳伦斯中后期作品中的几个主要反面男性人物和他们的失败的两性关系入手来理解劳伦斯的两性观点。     

“江西填湖广”与“湖广填四川”比较研究刍议

在中国移民史研究中,将各次移民潮作比较研究者甚为少见。而此种研究方法,无疑有助于深化对历史阶段移民运动特点、规律之认识。文章仅就“江西填湖广”与“湖广填四川”相同性和相异性比较研究,提出一些粗浅的思路和想法,以引起学术界深入探讨之兴趣。     

国家自然科学基金申请书的撰写实践

结合课题组实践对国家自然科学基金申请书中六项关键内容的填写进行了研究,概括了申请书撰写应把握六个要点:凸显优势选课题,言简意赅写摘要,了解现状讲依据,知无不言叙内容,切合自身定方案,人无我有求创新。同时,侧重于信息技术等具体项目内容对申请书质量的整体提升进行了探讨。     

大麦籽粒灌浆特性的研究

本文通过对十二个大麦品种籽粒灌浆“S”曲线的描绘,发现决定粒重的关键时期是在开花后22～37天,此期积累的物质占最大粒重的60%以上,单粒体积一般在开花后37天前后达到最大值。籽粒含水量在开花台47天就迅速降到20%左右。     

公路桥头跳车成因分析及技术措施

桥头跳车一直是道路桥梁工程界广为关注而又一直尚未解决的重大技术难题，本文针对桥头跳车问题进行了成因分析，介绍了其危害性及可行的几种防治措施，为进一步解决这一问题提供一些可实施的方法。     

阻力墙参数对转向节锻件充填影响的神经网络分析

为研究阻力墙结构参数对转向节锻件长叉充填的定量影响,设计了广义回归( GR)人工神经网络模型。用“舍一法”训练了模型,并采用3个样本对模型进行预测检验,散点表明预测值和实验值拟合较好。统计学指标为：均方误差M1为0. 898 0,相对均方误差M2为0.167 0%,拟合分值V为1.973 9,说明人工神经网络具有较高的预测精度。最后用 神经网络分析阻力墙关键参数对锻件长叉充填的定量影响,结果表明：长叉侧边桥部宽度和阻力墙斜度的增加对长叉充填作用不明显;阻力墙间隙的加大不利于长叉充填;阻力墙宽度对长叉充填的影响呈抛物线关系,先增大后减小,存在一个极大值。GR人工神经网络模型能够定量预测各阻力墙参数对长叉充填的影响。     

桶装水灌装机优化设计

针对现有桶装水灌装生产线中灌装机产能较低、产品适应能力差的缺点,提出了能够适用于19升、17升、11升等多种桶型的高速柔性化灌装机的设计方案。灌装机的灌装头采用气动比例调节阀搭配传感器进行闭环控制,使得灌装液位精确,减少液体飞溅;进瓶装置采用星轮拨爪和由伺服电机驱动的链条传动装置联动的方式,实现水桶的精准拉距,实现多种瓶型快速切换的功能;瓶盖输送机构,结合盖子杀菌柜,实现在线杀菌功能,安全可靠。应用结果表明文章的设计能改善原有桶装水灌装机柔性差、速度慢、可靠性低的现状。优化设计的桶装水灌装机提高了生产效率,降低成本。     

The Third Time Was the Charm

Abstract

A therapist's three experiences as a recipient of psychotherapy have led her to appreciate the ways in which one therapy informs another. She examines what may be learned from a less than successful therapy. She reflects on several lessons she has learned from her own therapieslessons that have shaped her as a clinician. In particular, she notes that when the therapist and patient are remarkably similar in their values and strengths, the therapist needs to take great care that key issues are not glossed over or mishandled.