车载式施肥机肥箱的设计

肥箱是施肥机的重要构成部分,本文对肥箱的形状进行了设计,同时对其容积提出要求。通过对振动式和搅拌式两种消除化肥架空的方法进行比较,搅拌式防架空方式结构简单,简便易行,能有效的消除架空和结块现象,故适合在实际中推广应用。     

附合导线近似严密两种平差方法点位精度的对比

随着全站仪、GPS的广泛使用,导线测量已成为普遍采用的控制测量方法。本文利用附合导线实例计算了近似、严密平差两种算法的点位精度,提出了两种方法的应用领域。     

SAM在Hyperion数据的土地利用分类中的应用——以平顶山新华区为例

利用SAM分类原理,以Hyperion高光谱遥感数据为数据源,对平顶山市新华区的部分地区进行了土地利用类型的分类提取,并利用混淆矩阵进行精度评价验证,总精度为95％,Kappa系数为0.8962.研究结果表明,高光谱数据的土地利用分类中,光谱角匹配技术是一种有效的分类方法,可以满足土地利用类型信息的分类需要.     

Assessment of a Task-based Language Lesson:How to Give Suggestions

As a significant issue of a task-based language lesson,it is raised repeatedly is that how to connect a task with some real-world activities.As Long(1985) states that tasks should involve activities that occur in daily life.When international students came to foreign countries at first,they probably have substantial academic and living difficulties.It is of practical value to provide suggestions to international students and make them to help others.Therefore,following situational authenticity(Ellis,2009),the writer selected‘how to give suggestions' as the lesson topic.According to the criteria of Common European Framework,targeted international students understand appropriate input about familiar activities,meanwhile,describe and provide personal experience,some interpretations and reasons for personal decisions.According to Dunbar(1992) suggests that working in pair is more interactive than other grouping,while four-member grouping achieves high level of efficiency.Therefore,the lesson involved eight students for the purpose of dividing them into pair work and group cooperation.With regard to goals of the lesson,there are two aspects: 1) grammatical target: students can provide advice and suggestions in eight structures,for instance,shall we...,let us...,what about...,would you like...,why not...,had better...,will you please...and do not...2) communicative target: students can enhance fluency and accuracy of speaking.     

科技翻译的标准探讨(英文)

This paper mainly discusses the criteria of scientific translation,accuracy of content,accuracy of style and economy,which play a very vital role in guiding scientific translation.Several examples are utilized to support the application of these translation standards.     

电烘箱温度监控系统设计

结合实验室现有设备,应用分散控制工程设计方法和软件设计方法开发了一套实用小型温度监控系统。该系统包括硬件及软件两大部分,硬件系统由计算机、智能仪表以及电烘箱组成,软件系统采用VisualBasic可视化编程语言编写控制程序,系统上层由计算机控制,下层由智能仪表控制。该系统实现了对温度的采集及温度曲线控制,并对采集数据进行实时、直观的显示,储存并打印各种数据、表格和曲线。最后对温度控制精度及影响因素进行了分析。     

模具零件电火花加工中电极定位方式的探析

冲压模具模板上型孔的相对位置精度,直接影响冲压件的零件质量,采用电火花加工时,型孔的相对位置精度是由加工时电极与工件的相对位置精度决定的,因此电极的定位精度是保证冲压件的质量的重要条件。本文以冲压模具的凹模板型孔的电火花加工为例,阐述了电火花加工中电极定位常见的三种方法;描述三种定位方法各自的定位操作过程;提炼了三种定位方法共同的核心技术条件;分析了三种定位方法各自的优势与缺陷,以期为零件的电火花加工的生产实践、电极的定位方法选择及定位操作技巧提供有用的技术支撑。     

绝对和相对小车结合法在长轨精调技术中的应用研究

高铁无砟轨道在长轨铺设完后需要对线路进行全面静态调整,将轨道几何尺寸调整到允许误差范围内,使线路轨道平顺性充分满足高铁联调联试前提要求.由于过程中消除轨道病害时间短、任务重,快速查找病害位置和消除方法便成为关键.位于高寒、高海拔、风沙环境下的兰新铁路LXS-2标段及时研究并采用绝对和相对小车结合法轨道调整技术,不仅提高...     

Summary Intervals for Model-Based Classification Accuracy and Consistency Indices

When scores are used to make decisions about respondents, it is of interest to estimate classification accuracy (CA), the probability of making a correct decision, and classification consistency (CC), the probability of making the same decision across two parallel administrations of the measure. Model-based estimates of CA and CC computed from the linear factor model have been recently proposed, but parameter uncertainty of the CA and CC indices has not been investigated. This article demonstrates how to estimate percentile bootstrap confidence intervals and Bayesian credible intervals for CA and CC indices, which have the added benefit of incorporating the sampling variability of the parameters of the linear factor model to summary intervals. Results from a small simulation study suggest that percentile bootstrap confidence intervals have appropriate confidence interval coverage, although displaying a small negative bias. However, Bayesian credible intervals with diffused priors have poor interval coverage, but their coverage improves once empirical, weakly informative priors are used. The procedures are illustrated by estimating CA and CC indices from a measure used to identify individuals low on mindfulness for a hypothetical intervention, and R code is provided to facilitate the implementation of the procedures.     

Quotation accuracy in educational research articles

This study examined to what extent educational research articles are cited in accordance with content. Analysis of 500 randomly selected citations from articles published between 2016 and 2020 and listed in Web of Science Core Collection revealed an overall accuracy rate of 85%. Quotation accuracy was independent of a citation's specificity and bibliometric characteristics. However, the severity of quotation mistakes was associated with how specific the content of a referenced source is described and whether authors quote the work of a colleague or their own. These findings are discussed in light of established accuracy rates in other academic fields and measures to reduce quotation errors are proposed.