自来水厂供电稳定性浅析

供电稳定可靠是自来水厂正常生产的关键。提升水厂供电可靠性可从以下几方面考虑:供电回路设计,母线设计,用电设备的技术水平与质量水平,管理制度与操作规程等。文章从这几方面论述如何提升水厂的供电可靠性。     

高校关工委在贫困生工作中的作用探析——以扬州职业大学为例

随着高等教育的普及,高校贫困生比例逐年上升,贫困生问题已经成为政府重视、社会关注、学校关心的社会问题,初步形成了＂奖、助、贷、减、免＂的资助体系,有效缓解了贫困生入学难的困境,但目前贫困生工作存在着物质帮扶多、精神帮扶少;生活帮扶多、学业就业帮扶少;帮扶工作力量单一等问题。本文以高校关工委为视角,探讨其在贫困生帮扶工作中的作用,充分发挥高校关工委的主体优势、精神优势、时间优势和资源优势,提出高校关工委对贫困生帮扶的对策和措施。     

Information resources estimation for accurate distribution-based concept drift detection

Machine learning applications must continually utilize label information from the data stream to detect concept drift and adapt to the dynamic behavior. Due to the computational expensiveness of label information, it is impractical to assume that the data stream is fully labeled. Therefore, much research focusing on semi-supervised concept drift detection has been proposed. Despite the large research effort in the literature, there is a lack of analysis on the information resources required with the achievable concept drift detection accuracy. Hence, this paper aims to answer the unexplored research question of “How many labeled samples are required to detect concept drift accurately?” by proposing an analytical framework to analyze and estimate the information resources required to detect concept drift accurately. Specifically, this paper disintegrates the distribution-based concept drift detection task into a learning task and a dissimilarity measurement task for independent analyses. The analyses results are then correlated to estimate the required number of labels within a set of data samples to detect concept drift accurately. The proximity of the information resources estimation is evaluated empirically, where the results suggest that the estimation is accurate with high amount of information resources provided. Additionally, estimation results of a state-of-the-art method and a benchmark data set are reported to show the applicability of the estimation by proposed analytical framework within benchmarked environments. In general, the estimation from the proposed analytical framework can serve as guidance in designing systems with limited information resources. This paper also hopes to assist in identifying research gaps and inspiring new research ideas regarding the analysis of the amount of information resources required for accurate concept drift detection.     

智慧城市建设视角下资源环境承载能力提升路径研究

基于熊彼特创新理论,论证了智慧城市建设对资源环境承载能力的影响机制,利用陕西省2015—2019年的面板数据,结合结构方程模型（SEM）与模糊集定性比较分析法(fsQCA),探索智慧城市建设各维度对资源环境承载能力的影响及多维度间“联合效应”与“互动关系”。研究发现：①智慧环境、智慧人力资本和智慧经济对资源环境承载能力有显著正向效应。②智慧经济在推动资源环境承载能力可载中起到了关键作用。③存在经济拉动型、环境治理型、绿色发展型和创新驱动型等四条智慧城市建设路径可以提升资源环境承载能力,具体可归纳为产业升级推动式和环境规制拉动式。④在一定情形下智慧经济与智慧治理、智慧环境之间具有替代关系。本研究深化了现有智慧城市建设效应理论研究,并为以提升资源环境承载能力为导向的智慧城市建设提供了差异化的方案。     

基于FCM-PFS与PSO-RF的隐性知识外显案例适配研究

对隐性知识外显案例实施有效适配,于知识应用乃至创新、实现乃至增值知识资源的价值,具有重要意义。本文深入研究了隐性知识外显案例适配机理。首先,采用毕达哥拉斯模糊集对知识属性值进行处理,建立知识表达系统;接着,运用K-Means算法对FCM聚类算法进行改进,压缩匹配空间、提升案例匹配效率;而后,基于PFS相关系数求解知识供需间的视图相似度,从而获得适配案例集。在此基础上,构建随机森林适配模型,并采用粒子群算法对其优化,以确保适配效果。与传统算法的对比实验验证了本文算法的比较优势。     

关于高校体育教学改革的实践探索

本文以宁波高等专科学校的在校生为研究对象，以不同性别的男女学生对参加体育活动的动机类型为研究内容，探究高校体育在贯彻《全民健身计划纲要》中的现实意义和时代价值。     

仿真模拟系统在实习教学中的应用

分析了实地实践教学模式的缺点,设计开发了针对电气类专业的面向WEB电网仿真系统的架构,介绍了其在电力实习教学中的应用,弥补了电力实习教学实地实习的不足。     

STEM Is Elementary: Challenges Faced by Elementary Teachers in the Era of the Next Generation Science Standards

For students to achieve the goals of the Next Generation Science Standards (NGSS) by Grade 12, thinking and acting like scientists and engineers must begin in the elementary grades. However, elementary teachers may find this challenging -because language arts and mathematics still dominate many classrooms—often at the expense of science. This essay examines the science skills elementary students are expected to learn and how teachers and administrators can approach the increased demands of NGSS.     

科研体制中的权力维度

本文通过分析发展科研能力的必要性,提出高校和基金会制中,按一定规则赋予科研人员或科研组织一定的行政权力是促进科学发展的重要因素,     

Two direct Tustin discretization methods for fractional-order differentiator/integrator

This paper deals with fractional calculus and its approximate discretization. Two direct discretization methods useful in control and digital filtering are presented for discretizing the fractional-order differentiator or integrator. Detailed mathematical formulae and tables are given. An illustrative example is presented to show the practically usefulness of the two proposed discretization schemes. Comparative remarks between the two methods are also given.