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     

The context of employment discrimination: interpreting the findings of a field experiment

Although field experiments have documented the contemporary relevance of discrimination in employment, theories developed to explain the dynamics of differential treatment cannot account for differences across organizational and institutional contexts. In this article, I address this shortcoming by presenting the main empirical findings from a multi‐method research project, in which a field experiment of ethnic discrimination in the Norwegian labour market was complemented with forty‐two in‐depth interviews with employers who were observed in the first stage of the study. While the experimental data support earlier findings in documenting that ethnic discrimination indeed takes place, the qualitative material suggests that theorizing in the field experiment literature have been too concerned with individual and intra‐psychic explanations. Discriminatory outcomes in employment processes seems to be more dependent on contextual factors such as the number of applications received, whether requirements are specified, and the degree to which recruitment procedures are formalized. I argue that different contexts of employment provide different opportunity structures for discrimination, a finding with important theoretical and methodological implications.     

Media Disaster Reporting Effects on Public Risk Perception and Response to Escalating Tornado Warnings: A Natural Experiment

Previous research has evaluated public risk perception and response to a natural hazards in various settings; however, most of these studies were conducted either with a single scenario or after a natural disaster struck. To better understand the dynamic relationships among affect, risk perception, and behavioral intentions related to natural disasters, the current study implements a simulation scenario with escalating weather intensity, and includes a natural experiment allowing comparison of public response before and after a severe tornado event with extensive coverage by the national media. The current study also manipulated the display of warning information, and investigated whether the warning system display format influences public response. Results indicate that (1) affect, risk perception, and behavioral intention escalated as weather conditions deteriorated, (2) responses at previous stages predicted responses at subsequent stages of storm progression, and (3) negative affect predicted risk perception. Moreover, risk perception and behavioral intention were heightened after exposure to the media coverage of an actual tornado disaster. However, the display format manipulation did not influence behavioral responses. The current study provides insight regarding public perception of predisaster warnings and the influence of exposure to media coverage of an actual disaster event.     

零售4.0时代先行发货问题的大数据分析

在零售4.0时代，渠道的多样化不仅丰富了数据源，还能迅速生成大量数据，需要通过分析大数据，为决策提取有意义的信息，通过分析先行发货的重要性，提出了一种基于遗传算法（GA）的优化模型，预测顾客何时购买，然后在顾客线下单前将产品运送到距顾客最近的配送中心，解决先行发货中存在的问题。研究认为，需要先部署云计算来存储所有渠道生成的大数据，再应用基于集群的关联规则挖掘研究顾客的购买行为，根据“如果-那么”预测规则预测未来的采购情况，最后利用修正的遗传算法生成最优的先行发货计划；这种遗传算法考虑了其在运输成本和运输距离之外，还有预测规则的置信度，利用大量的数值实验权衡了先行发货中的不同因素，验证了模型的最优可靠性     

德行领导对员工创新行为的影响---工作繁荣与情感承诺的作用*

研究表明，德行领导作为家长式领导的核心维度，对员工行为有重要影响，但现有研究忽视了员工工作状态的重要作用。本文基于自我决定理论，以员工工作繁荣为中介，探讨德行领导对员工创新行为的影响，并从社会认同的情感视角出发，考察了情感承诺在上述关系间的调节作用。研究表明，德行领导对员工工作繁荣与创新行为均存在显著正向影响；员工工作繁荣对其创新行为存在显著正向影响；员工工作繁荣在德行领导与创新行为之间起部分中介作用；情感承诺调节了德行领导对员工创新行为的影响，情感承诺越高，德行领导对员工创新行为的影响越显著。     

区块链技术在版权登记中的创新应用

随着数字版权时代的发展，作品的传播方式变得更加灵活，传播速度也更加迅捷。传统版权登记制度因存在登记成本较高、标准不一、泄露隐私等弊端，在实际应用中面临困境，区块链技术的出现为推动版权登记的适时发展提供了一种新思路。区块链技术应用于版权登记，其去中心化特质可以降低登记成本；分布式共享机制能够统一登记标准；难以篡改的性质能够提高登记的证明效力；弥补了既有版权登记制度的缺陷。同时，区块链技术利用自身特性建立新的版权信任机制，既能清晰地分配版权利益，又能创新传统的版权商业模式，推动版权市场的发展，最大化地利用版权的固有价值。区块链技术在与版权登记相结合的过程中，会出现一些技术上难以解决的问题，既无法对作品的独创性进行准确的判断，也无法发挥版权制度原有的公示力作用。因此，必须创新版权登记规则，加快制定区块链版权平台市场准入机制，并设置统一的监管机构，将区块链锁在版权制度的笼子里，防止出现滥用区块链技术的情形，以最终实现技术和法律的融合发展。     

ALL-BIAS DESIGNS FOR POLYNOMIAL SPLINE REGRESSION MODELS

Polynomial spline regression models of low degree have proved useful in modeling responses from designed experiments in science and engineering when simple polynomial models are inadequate. Where there is uncertainty in the number and location of the knots, or breakpoints, of the spline, then designs that minimize the systematic errors resulting from model misspecification may be appropriate. This paper gives a method for constructing such all‐bias designs for a single variable spline when the distinct knots in the assumed and true models come from some specified set. A class of designs is defined in terms of the inter‐knot intervals and sufficient conditions are obtained for a design within this class to be all‐bias under linear, quadratic and cubic spline models. An example of the construction of all‐bias designs is given.     

中学化学实验研究选题探讨

中学化学实验研究的关键问题是如何选择研究课题。应从中学化学教学的需要、中学化学实验研究的内容、中学化学实验的发展趋势以及中学化学实验教学改革等方面来选择研究课题。     

高新技术园区社会创新环境的系统整合

今天的高新技术园区在发展的意义上 ,已经成为现实的社会实体。从这一理念出发 ,思考园区的建设和发展 ,其创新环境是个非常重要的问题 ,也可以说它是各类高新技术园区得以发展的基本条件。创新环境状况的好坏直接关系到园区内高新技术产业的发展。从严格意义上讲 ,缺少这个基本条件 ,高新技术园区难以形成 ,创新环境不完善 ,即便是已经建立起来的园区 ,也难以得到真正的发展。由此决定了建设高新技术园区必须重视对园区社会创新环境的研究 ,通过精心培育创新环境 ,推动我国高新技术园区在 2 1世纪得到健康、持续的发展。     

关于高校实验室建设的几点思考

为把高校实验室建成开放式的创新实践基地 ,更好地发挥其在教学、科研、生产等方面的重要作用 ,应加强对高校实验室的硬件建设 ,并进行科学的统筹规划 ,加速提升实验室整体实力 ;加强实验教学师资队伍建设 ,实现实验室建设的跨越式发展