To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electr...To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electrocardiosignal (ECS) and cardiac sound signal (CSS), a four-channel signals collector is introduced in this article. This collector is composed of microcomputer STM32F103RB with integrated 12-bit analog to digital converters (ADCs) and some integrated chips (IC) such as PGA113, a programmable gain amplifier with internal calibration channels for system-level calibration. Therefore, the data of four kinds of cardiovascular signals can be both collected by this signal collector with a high precision and output to a computer by universal serial bus (USB) interface, which can also offers power for this instrument. In addition, the gain of input signal can be changed by computer software through USB interface under microchip commands. Thus it has many merits, such as the small volume, low cost, high performance and precision, digital-controlled gain and so on. Consequently, it is convenient to acquire the data of four kinds of cardiovascular signals by it, and a waveform of one sample is shown.展开更多
数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Econo...数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Economic Co-operation and De-velopment,OECD)发布了《过程数据在大规模教育评估中的应用》报告,该报告提出在规模化教育评估中将过程数据应用于优化设计、解释结果、保障质量、测量表现和验证测试,强调对过程数据应用的有效性验证,以及通过制定道德准则规范过程数据的应用。笔者通过对报告的要点内容进行分析解读,结合数字教育评估的创新发展趋势,提出从建立数字教育评测体系、探索数据化评估模式、践行数智精准评测设计、开展数字教育评测实践、健全数据伦理规范与评估规制等五方面推进数据驱动的规模化教育评估实施方略。展开更多
文摘To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electrocardiosignal (ECS) and cardiac sound signal (CSS), a four-channel signals collector is introduced in this article. This collector is composed of microcomputer STM32F103RB with integrated 12-bit analog to digital converters (ADCs) and some integrated chips (IC) such as PGA113, a programmable gain amplifier with internal calibration channels for system-level calibration. Therefore, the data of four kinds of cardiovascular signals can be both collected by this signal collector with a high precision and output to a computer by universal serial bus (USB) interface, which can also offers power for this instrument. In addition, the gain of input signal can be changed by computer software through USB interface under microchip commands. Thus it has many merits, such as the small volume, low cost, high performance and precision, digital-controlled gain and so on. Consequently, it is convenient to acquire the data of four kinds of cardiovascular signals by it, and a waveform of one sample is shown.
文摘数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Economic Co-operation and De-velopment,OECD)发布了《过程数据在大规模教育评估中的应用》报告,该报告提出在规模化教育评估中将过程数据应用于优化设计、解释结果、保障质量、测量表现和验证测试,强调对过程数据应用的有效性验证,以及通过制定道德准则规范过程数据的应用。笔者通过对报告的要点内容进行分析解读,结合数字教育评估的创新发展趋势,提出从建立数字教育评测体系、探索数据化评估模式、践行数智精准评测设计、开展数字教育评测实践、健全数据伦理规范与评估规制等五方面推进数据驱动的规模化教育评估实施方略。
