教学课程资源库 更多>>

关键词： Computers  

关键词： Alphabet   artificial intelligence   breast cancer   business in europe   business in the u.k.   cancer   computer science   corporate   demographic health   eye conditions   general news   GOOGL   health   humanities   industrial news   internet search engines   machine learning   medical conditions   medical research   medical treatments   new products   online service providers   political   procedures   products   radiology   respiratory tract cancer   respiratory tract diseases   sciences   services   technology   women's health  

关键词： Alphabet   artificial intelligence   breast cancer   business in europe   business in the u.k.   cancer   computer science   corporate   demographic health   eye conditions   general news   GOOGL   health   humanities   industrial news   internet search engines   machine learning   medical conditions   medical research   medical treatments   new products   online service providers   political   procedures   products   radiology   respiratory tract cancer   respiratory tract diseases   sciences   services   technology   women's health  

关键词： collaboration   computer science   informal learning   middle school   Pair programming  

摘要： Background and Context: Pair programming is used in classrooms to promote learning and engage a more diverse group of students in computing fields, but little is known about what it looks like in middle school. Objective: The aim of this study was to examine how programming pairs were interacting and about what. Method: Video, audio, and screen capture data were collected and analyzed from 66 middle school students working in pairs to program a computer game in an after-school class. Findings: Less than half of pairs interaction time was about their game, and one third of their time was spent not interacting at all. Most behaviors were collaborative. There were few differences across demographic groups. Factors that significantly influenced interactions and behaviors included attitude toward collaboration and prior programming knowledge. Implications: We discuss how to use pair programming in the classroom, including how to pair students to promote productive interactions. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

关键词： CDIO initiative   program evaluation   engineering education   curricular reform  

摘要： We present the lessons learnt in the process of adopting the Conceive-Design-Implement-Operate (CDIO) approach for the curricular reform of the Computer Science program at the School of Engineering of the Universidad Catolica de la Santisima Concepcion, Chile. These lessons were gathered through a participatory and iterative process involving members of the Computer Science program's curricular committee in charge of the CDIO implementation and self-evaluation processes, and members of the program's national accreditation self-evaluation committee. They are presented in response to the following questions: what actions effectively aid standards implementation, and what factors must be considered in order to successfully implement CDIO. We share them in the hope of aiding other institutions that are evaluating the adoption of the CDIO approach.

关键词： Computer science  

关键词： 细胞培养   污染   “黑胶虫”   纳米细菌   抗生素  

摘要： 很多国内的细胞培养实验室受到"黑胶虫"(或称为"胶虫"、"焦虫")污染的困扰,类似的污染在国外通常称为"纳米细菌"(nanobacteria)污染,但"黑胶虫"/纳米细菌究竟是何物种抑或是一种非生命颗粒,至今还没有定论.我们将细胞培养中的污染物从培养基中分离出来,进行培养和形态学观察,并利用16S r DNA鉴定技术及VITEK-2微生物鉴定系统对"黑胶虫"进行鉴定,最后通过抗生素敏感试验及细胞结晶紫染色技术筛选出抑制"黑胶虫"增殖的抗生素及可用于细胞培养的工作浓度.形态学观察结果显示:"黑胶虫"在普通倒置显微镜下呈点状或片状;电镜下展示为杆状,长1 300~1 600 nm,宽400~500 nm;在激光共聚焦扫描显微镜400倍镜下进行原地"布朗运动". 16 S rDNA鉴定及VITEK-2微生物鉴定系统结果显示:本实验室分离的"黑胶虫"为一株短波单胞菌属(Brevundimonas)的新菌株,该菌株与Brevundimonas diminuta的相似性为97.8%,与Brevundimonas faecalis的相似性为98.1%.抗生素敏感试验结果显示:"黑胶虫"对氯霉素(25 mg/L)、红霉素(200 mg/L)和四环素(2.5 mg/L)敏感,对氨苄青霉素(50 mg/L)、嘌呤霉素(2 mg/L)、青霉素-链霉素双抗(100×)和庆大霉素-两性霉素B双抗(100×)均不敏感.细胞结晶紫染色结果显示:细胞培养基中添加一定浓度的氯霉素(25 mg/L)、红霉素(200 mg/L)或四环素(2.5 mg/L)均可抑制细胞培养中"黑胶虫"的增殖,降低其对细胞增殖的抑制作用.综上所述,本研究分离鉴定的"黑胶虫"为一种短波单胞菌,低浓度的氯霉素、红霉素或四环素均可降低该菌对细胞增殖的抑制作用.鉴于研究的局限性,我们不排除"黑胶虫"是其他物种的可能性,但是本研究为"黑胶虫"的种属鉴定及细胞无菌化培养提供了新的研究思路及方法,并有望帮助一些实验室解决"黑胶虫"污染的困扰.

关键词： 网络工程专业   工程型人才培养   产学研平台  

摘要： 本文从人才培养目标、人才培养方案、教学环节、考核方式等方面,分析了工程型人才培养区别于传统高校人才培养的区别,并介绍了长春工业大学网络工程专业的工程型人才培养的一些机制和教学实践环节中的改进方法以及产学研平台对工程型人才培养的促进作用。

关键词： 功能对等理论   英文被动句   汉译方法  

摘要： 科技文体为体现其客观性和准确性,英文多用被动句。中文却很少用被动句。本文以功能对等理论作为指导,分析中英文被动句的不同之处,并对Writing for Computer Science一书中被动句的具体实例进行分析和翻译,尝试总结该书中英文被动句的汉译方法。