540MPa级高强度滚型车轮用钢的研制与应用

通过在碳锰钢的基础上添加Nb微合金化元素,成功开发出珠光体占10%的铁素体＋珠光体组织的高强度车轮用钢,该钢钢质纯净、晶粒细小、强度高、成形性能优良,已成功应用于轿车轮辋制造。     

PCL一839卡在FDM位置控制系统的应用研究

概述了FDM位置控制系统和PCL一839卡的特点,并详细介绍了如何在FDM位置控制系统中应用PCL一839卡,包括硬件连接和软件的设计。     

高职电类专业毕业设计选题探讨

毕业设计是高校教学的重要环节,也是教学质量评价的主要内容。从毕业设计选题的角度出发,结合高职院校电气自动化专业的培养目标,分析当前毕业设计选题中存在的问题,探讨毕业设计选题过程中应当遵循的原则,并提出相应的改革建议。     

Machine learning-enabled multiplexed microfluidic sensors

High-throughput, cost-effective, and portable devices can enhance the performance of point-of-care tests. Such devices are able to acquire images from samples at a high rate in combination with microfluidic chips in point-of-care applications. However, interpreting and analyzing the large amount of acquired data is not only a labor-intensive and time-consuming process, but also prone to the bias of the user and low accuracy. Integrating machine learning (ML) with the image acquisition capability of smartphones as well as increasing computing power could address the need for high-throughput, accurate, and automatized detection, data processing, and quantification of results. Here, ML-supported diagnostic technologies are presented. These technologies include quantification of colorimetric tests, classification of biological samples (cells and sperms), soft sensors, assay type detection, and recognition of the fluid properties. Challenges regarding the implementation of ML methods, including the required number of data points, image acquisition prerequisites, and execution of data-limited experiments are also discussed.     

经典测量理论与项目反应理论的比较研究

文章通过对经典测量理论和项目反应理论的模型及其假设、主要概念和参数、测量水平等方面进行比较,廓清了两种理论的联系和区别,明确了两种理论的优势和不足,从而为研究者根据测验实践的要求和各个理论的适用条件选择恰当的分析框架提供思路。     

Beyond the white norm: the use of qualitative methods in the study of black youths’ schooling in England

There is at present in England great confusion concerning the schooling of black youths. Much conventional “race‐relations” research is underpinned by models of social pathology that perceives the youths as a “problem.” While carrying out a study of black students, of Afro‐Caribbean and Asian parentage, qualitative research pointed to the need to re‐conceptualise their experience of schooling within a framework that moves beyond liberal assumptions of a de‐racialised, de‐gendered and de‐politicised school system. Placing students at the centre of the research enables us to see how school for black youths is part of a wider alienating response to them that results in their experience of a “different reality” from the white population. In response to this, the students have creatively developed a number of survival strategies. This article explores the implications of the relative autonomy of methodology from wider theoretical and substantive concerns. In this largely autobiographical account the dialectical nature of ethnography is illustrated, with the theoretical#shconceptual analysis grounded in the data gathering process.     

深化教学改革提高办学质量--谈西安体育学院成人教育的特点

在不断扩大办学规模的今天 ,如何保证体育函授教学的质量 ,这就给我们成教工作者提出了新问题。对西安体育学院成人函授教育工作的经验进行了总结 ,提出“八个从严”是保证体育函授教学质量的重要条件。     

体育学院优秀散打运动队管理现状研究

本文采用文献资料法、问卷调查法、访谈法、数理统计法对我国体育院校优秀散打运动队的基本情况和运动员在思想、学习、训练以及生活管理中的现状进行分析探讨,希望能及时解决管理中存在的问题,从而为进一步提高我国散打运动队的管理提供服务。     

Differential effects of reading trainings on reading processes: a comparison in Grade 2

Phonics, fluency, and reading strategy trainings are evidence-based interventions that foster the reading skills of poor readers in primary school. The purpose of the present study was to compare differential effects of the three types of trainings on the efficiency of component processes on word, sentence, and text level immediately after the training and at a 3-month follow-up. The 235 poor readers were randomly allocated to one of the reading interventions or to a control condition. All interventions consisted of 25 sessions that were scheduled twice a week and lasted 45 min. Results indicated short-term effects of the phonics training and the strategy training on the efficiency of a broad range of word-level and sentence-level processes. None of the treatment effects persisted over the long term, indicating the need for instructional efforts to regularly practice the acquired skills after the actual training.     

中国古代的水煮方便食品:棋子面与挂面

棋子面最早出现于《齐民要术》,是一种状如棋子、蒸熟以备不时水煮食用的方便食品。唐宋元明各代多作为军食,其烹熟方式也衍生出炒、油煎等,后世又作为幼儿方便食品。近代的"棋子面"则多了一种擀切为菱形的面片。"挂面"一词始出《饮膳正要》,但在唐代敦煌文献中即有"须面"称谓,元代文献也称之为"索面"。是一种水煮方便条状粉食。