一起不锈钢冷轧生产线火灾的调查

通过对一起不锈钢冷轧工艺生产线火灾的调查,介绍了不锈钢冷轧的生产工艺流程,并对起火时间、起火点、火灾原因进行了分析确定,提出了针对性的防范对策,对类似的火灾调查有一定的借鉴意义。     

浅议新元矿井建井期间安全高效通风技术

新元矿井建井初期采用立井开拓方式,立井到底后,如仍采用地面通风,仅能满足4个掘进工作面的用风需求。为满足安全高效的施工要求,通过分析比较两种通风方案,选择在中央进、回风井井筒安装4趟玻璃钢风管作为假回风,实现了矿井建设期间的全负压通风,通风能力可满足15个掘进工作面生产,保证了矿井安全生产。     

二维光催化材料研究进展

以石墨烯为代表的二维材料因其厚度尺寸和层状结构特点,表现出许多独特的物理化学性质,比如导电率高、化学性质稳定以及比表面积大等特点,在环境、材料、能源和催化领域具有广泛的应用前景.而二维材料与半导体复合,不仅可以拥有单个组分的优势,而且每种组分之间的相互作用还可能会引起本征性能的协同增强,因此二维材料-半导体复合光催化剂...     

欧盟EuP指令最新进展及应对策略

欧盟EuP指令已于2006年7月1日正式实施。EuP指令以生态环保设计为手段,以保护环境资源和减少能源消耗为目的,已经成为欧盟第四大环保技术壁垒。欧盟关于EuP的研究取得了新的进展,我国机电企业需要密切关注,并采取相应的应对策略。     

How operators make use of wide-choice adaptable automation: observations from a series of experimental studies

The present paper is concerned with the design of adaptable automation. It analyses the aggregated data from five experiments (N = 154) to examine which automation levels operators prefer, how often they switch between them, and whether performance is associated with frequent switching or the automation levels being used. Using wide-choice adaptable automation (i.e. up to six levels were offered), the experiments were conducted using a PC-based simulation of a complex work environment. The results showed that about 95% of operators had a clearly preferred automation level, which they used for more than 50% of the time. They strongly preferred intermediate automation levels over levels at the higher and lower ends of the scale. Most operators switched rarely between levels and when they did, they usually made small adjustment rather than large changes. Several implications for the design of adaptable automation were derived from the empirical data.     

Expert system for problem solving in distance university education: The successful case of the subject “operations management”

Acquiring the skills needed to solve certain types of problems is one of the main challenges of distance university education, demanding extra motivation from students to tackle it. New technology should be one of our great allies in addressing these problems. This article proposes an expert system with a web‐based problem‐solving simulator for a multidevice environment in order to allow students to access an unlimited number of problems with their corresponding solutions, immediately, anytime and anywhere. The types of problems that can be used are those based on quantitative methods with a fixed methodology to be followed. A successful case study was carried out for the subject Operations Management at the Distance University of Madrid (UDIMA), with three different problem simulators having been developed. The results were very satisfactory compared with previous academic years in terms of motivation. A decrease in students that did not sit the final examination was observed, as was an increase in the number of visits to the Moodle classroom. Students also responded positively in their assessments of the initiative.     

Strategic effort allocation in online innovation tournaments

Online innovation tournaments, such as those hosted by crowdsourcing platforms (e.g., Kaggle), have been widely adopted by firms to evolve creative solutions to various problems. Solvers compete in these tournaments to earn rewards. In such competitive environments, it is imperative that solvers provide creative solutions with minimum effort. This article explores the factors that influence the solvers’ effort allocation decisions in a dynamic tournament setting. Specifically, comprehensive time variant data of teams that participated in crowdsourcing competitions on Kaggle were analyzed to gain insight into how solvers continually formulate strategies in light of performance feedback obtained through interim ranking. The results suggest that solvers strategically allocate their efforts throughout the contest to dynamically optimize their payoffs through balancing the probability of winning and the cost of expending effort. In particular, solvers tend to increase their efforts toward the end of tournaments or when they get closer to winning positions. Furthermore, our findings indicate that a last-minute surge in effort is more prevalent among high-skill solvers than in those with lower skill levels. In addition to providing insights that may help solvers develop strategies to improve their performance, the study has implications for the design of online crowdsourcing platforms, particularly in terms of incentivizing solvers to put forth their best effort.     

Promoting or prohibiting: Understanding the influence of social media on international students’ acculturation process,coping strategies,and psychological consequences

Although the unprecedented prevalence of social media has infiltrated into international students’ daily trajectories and become an indispensable component of their intercultural communication, yet surprisingly few attempts have been implemented to systematically unpack how the innovative technology could play a role in these sojourners’ acculturation experiences and the consequences of migration and cross-cultural adaption. In order to address such research gap, the objective of this present article is to provide a review of academic, peer-reviewed journal studies that examined the potential effect of social media engagement on international university students’ acculturation process, coping strategies, and psychological adjustments during the period from 2010 to 2019. Moreover, building upon conceptualizations from new media and transcultural research literature, a conceptual framework was developed to classify the relevant studies for further analysis. Overall, these theories and studies synthesized in this paper emphasize the vital role of social media in the acculturation, coping behaviors and mental health for ethnic minorities in the host country. Additionally, certain dimensions of attitudes and behaviors through social media could exert the important influence on the psychological adaption. Therefore, conclusions of the research may assist to further inform practitioners who may encounter newcomers’ experiencing intercultural adjustments and psychological issues in the digital media age. Furthermore, this current review may also help educators determine certain barriers that have not been resolved in campus tactics which may influence the acculturation of sojourning populations.     

辅酶Q_(10)发酵生产的育种思路及发酵条件优化策略

辅酶Q10 是一种重要的生理功能性物质 ,利用微生物的代谢调控理论 ,系统地阐述了辅酶Q10 的工业发酵方法 ,育种思路 ,发酵过程的优化以及控制方法 ,为辅酶Q10 的发酵生产提供指导