后信息时代职校生核心素养的结构体系、生成机制与教学支持

后信息时代职业教育有着高新技术融合应用、个性化教育资源充沛、注重创感力培养等特征。从后信息时代视角看,职校生在信息素养与专业技能基础之上展现其核心素养,信息素养、创新能力、元认知能力构成后信息时代职校生核心素养结构,其形成基于“贯穿—循环”生成机制,以信息素养与专业知识技能为基础层,混合式教学为手段作为中介层,创新能力作为最高体现置于顶端层,元认知能力则对整个过程进行知察监控。指向后信息时代职校生核心素养的教学支持,应将职业教育与互联网技术优势相结合,兼顾核心素养与专业技能一体化发展,从教学目标、教学内容、教学实施与教学评价四个方面进行教学模式构建。

Dynamic Response Analysis of High-Speed Train Gearbox Housing Based on Equivalent Acceleration Amplitude Method

Gearbox, as the crucial transmission equipment of high-speed train drive system, bears mainly the impact of wheel-rail excitation during its application, resulting in fatigue failure of the housing structure. In order to analyze the vibration characteristics of the high-speed train gearbox housing, a test had been performed under operating condition on Wuhan-Guangzhou High-Speed Railway, where a host of vibration characteristics of different parts of housing had been obtained, and vibration signals had also been comparatively analyzed using acceleration amplitude spectrum and equivalent acceleration amplitude method. The result showed that the vibration level of the measuring point A on the joint part of the gearbox housing and axle bearing block was higher than that of the measuring point B on the upper part of the gearbox housing, both horizontally and vertically. And there existed attenuation during the transmission process of vibration from point A to Point B. Further, when a train was moving at a high speed, the gearbox vibration at the head carriage was better than that at the tail carriage. In addition, when a train slowed down from 300 km/h to 200 km/h, the horizontal equivalent acceleration amplitude dropped by 58% while the vertical one declined by 62%. Equivalent acceleration amplitude method was used to identify the vibration relations among different parts of housing, and the validity and applicability of this method were verified by data analysis. The study provided reference to ensure the operating safety of high-speed train drive system and design of new housing structure.

基于中医传承辅助平台探讨禽流感中医兽药规律研究

该文通过中医传承辅助平台挖掘现代文献,探究禽流感中医兽药的处方用药规律,为禽流感中兽药开发提供参考。以“中兽药”“鸡”“禽流感”等为检索词来检索中国期刊全文数据库、万方数据库、维普中文科技期刊全文数据库,检索时间区间为建库至2022年10月。应用EndNote X9进行文献筛选合并,建立治疗禽流感的中医兽药数据库,采用频数分析、聚类分析、关联规则分析等技术研究用药规律。结果表明:248篇文献359味中药中,频次排前10的为金银花、黄芪、甘草、板蓝根、连翘、黄芩、大青叶、鱼腥草、柴胡和黄连;四气出现频次由高到低排序为寒、温、平、凉、热;五味为苦味、甘味、辛味、酸味、咸味;归经为肺、胃、心、脾和肝;功效统计归类前五位为清热药、补虚药、解表药、化痰止咳平喘药以及利水渗湿药。关联分析中发现,金银花-板蓝根二组合药物出现频次最高,但置信度最高为板蓝根-连翘-金银花三组合药物。聚类分析中,发现三组合中黄芪、金银花、甘草、鱼腥草、板蓝根组合出现频次最高,为133次。可见,中药治疗禽流感类疾病具有一定的规律,其治疗以清热类为主,以“板蓝根-连翘-金银花”为核心药组,佐以补虚类、解表类等,可为治疗禽流感中兽药新药开发提供参考。