排序方式： 共有48条查询结果，搜索用时 15 毫秒
41.
运用单片机的控制和运算功能,结合电路元件的测量电路,通过编程来扩大对电阻、电容、电感的测量范围,设计了出自动测量电路元件参数的智能型仪器。 相似文献
42.
C. Paul Newhouse 《Learning Environments Research》2001,4(2):115-138
This article begins by constructing an argument from the literature to support the view that research into the use of computers
in classrooms must consider the overall learning environment. This provides the rationale for the development and use of the
New Classroom Environment Instrument (NCEI) in research conducted into the use of portable computers in a school. This study
particularly focused on the impact of the computers on classroom learning environments. An example is given of the use of
the instrument to investigate the use of the portable computers with classes of 13-year-old students. The intention of the
article is not to present the results of the study but to demonstrate the use of the instrument and encourage others to use
such instruments in educational computing research.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
43.
Cynthia Sims Parr Tricia Jones Nancy Butler Songer 《Journal of Science Education and Technology》2004,13(2):233-242
Despite a rise in the use of handheld computers in classrooms, meaningful learning with personal digital assistant (PDA) technology remains poorly studied. We report results from an evaluation of customized handheld data collection software, the BioKIDS Sequence, which was used during an 8-week biodiversity curriculum unit by 5th and 6th grade students in southeastern Michigan. We provide new information on design decisions and usability of our customized software; discuss learner use and preferences; and report rates of data accuracy. Most students were able to enter simple animal observations using an icon-driven, largely linear interface. The interface helped expand the types of data students were aware of, and allowed them to view and review their entries and flag them as uncertain, factors important in supporting accurate data collection. Other BioKIDS research indicates students were subsequently able to see simple patterns in their data to guide the formulation of future hypotheses, questions, or conclusions. The BioKIDS Sequence and PDA technology therefore represent a meaningful use of technology to support scientific reasoning. 相似文献
44.
通过对适配器模式和POA的分析,提出对于POA的实现,松散的和可扩充的结构是一个基本的因素,并给出了满足该条件的一个实现POA的有效的框架结构. 相似文献
45.
激光粒度仪是施测泥沙颗粒级配分布的设备,在施测过程中以测试水体中悬浮物来确定泥沙颗粒级配的分布,并通过体积转换常数来计算含沙量。本文就LISST-100x现场激光粒度分析仪“泥沙体积转换常数”的计算方法进行分析探讨,以确定最优值的选择方法。 相似文献
46.
示波器是电子测量中一种最常见的仪器,被广泛应用于各个领域。传统的数字示波器采用220V的交流供电,价格昂贵,体积较大,不适合于在野外或要求很低的生产现场中使用。本文描述一款基于ARM嵌入式处理器STM32和FPGA的便携式示波器,分析工作原理,以及硬件和软件的设计。 相似文献
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48.
王丽荣 《中国现代教育装备》2021,(7):34-36
设计了一款实用、适用的便携式微型机电自动化实习实训设备对于改进实训教育装备,提升实训教育效果,推动高等教育实训课程升级具有重要的实际意义。此设备采用传感、传动、电磁等多项机电技术,完成多种材料的分拣,设备简便、易操作、实用性强,经实践验证,适用于高校实习实训课程。 相似文献