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心率指心脏每分钟搏动的次数, 它能够反映心脏的工作状态。正常心率决定于窦房结的节律性, 成人静息时约60～100 次/ min , 平均约75次/ min。心率...
心率指心脏每分钟搏动的次数, 它能够反映心脏的工作状态。正常心率决定于窦房结的节律性, 成人静息时约60～100 次/ min , 平均约75次/ min。心率可因年龄、性别及其他因素而变化。初生儿心率约130 次/ min , 随年龄增长而逐渐减慢, 至青春期乃接近成人的心率。女性心率比男性稍快 运动员心率较慢。成人安静心率超过120 次/ min 者, 为心动过速 低于40 次/ min 者为心动过缓。心率受植物性神经和体液因素调节。-Heart rate means the number of pulse per minute, it can reflect the work of the state of the heart. Normal heart rate determined by the rhythm of the sinoatrial node, resting adult is about 60 ~ 100 times/min, an average of about 75 times/min. Heart rate may be due to age, gender and other factors change. Heart rate of newborn infants of about 130/min, growth has gradually slowed down with age, to adolescence adult heart rate is near. Women slightly faster rate than men athletes slow heart rate. Quiet adult heart rate over 120 times/min, and for the tachycardia less than 40 times/min for bradycardia. Heart rate by the plant regulate neural and humoral factors.
- 2022-01-25 17:00:58下载
- 积分：1
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返回一个城市的列表,传入省直接返回城市数组
返回一个城市的列表,传入省直接返回城市数组-Returns a list of cities, the introduction of direct return to the provincial city of the array
- 2022-01-20 22:46:16下载
- 积分：1
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公民煤层气
Citizen CBM-262 Srvice command reference
- 2023-04-09 00:10:04下载
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ch451是个重要的键盘和显示芯片，现在运用教广，是键盘和显示芯片首选，可以...
ch451是个重要的键盘和显示芯片，现在运用教广，是键盘和显示芯片首选，可以-ch451 is an important keyboard and display chips, and now widely taught to use is the keyboard and display chip of choice, you can
- 2022-01-28 23:44:57下载
- 积分：1
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Here a methodology for eye position tracking with details on software and hardwa...
Here a methodology for eye position tracking with details on software and hardware implementation
- 2022-01-23 10:06:59下载
- 积分：1
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SoC system design complexity, require more effective means to complete the simul...
SoC系统设计的复杂性，要求更有效的手段来完成仿真，验证及软硬件结合等任务。SoC设计平台应运而生。本文以智原科技的SoCreative! A320设计平台为例，介绍了如何使用SoC设计平台进行快速有效的SoC开发设计-SoC system design complexity, require more effective means to complete the simulation, and the combination of hardware and software validation, and other tasks. SoC Design Platform emerged. Based on the original technology-SoCreative! A320 design platform as an example. on how to use the SoC design platform for the rapid and efficient development of SoC Design
- 2022-03-07 14:11:06下载
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定时计数器主要需要8253来进行定时计数功能的实现
定时计数器主要需要8253来进行定时计数功能的实现-Timing the key needs of counter 8253 to count function from time to time to achieve
- 2022-01-26 00:07:52下载
- 积分：1
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智能全数字锁相环的设计,基于FPGA实现。
智能全数字锁相环的设计,基于FPGA实现。-Intelligent all-digital phase-locked loop design, FPGA-based implementation.
- 2022-02-14 02:38:32下载
- 积分：1
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运算放大器设计与应用―电子工程师必备手册
运算放大器设计与应用―电子工程师必备手册-Operational Amplifiers Design and Application- Electronic Engineer required manual
- 2023-02-17 04:00:03下载
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Please read your package and describe it at least 40 bytes in English.
Please read your package and describe it at least 40 bytes in English.
- 2022-09-06 09:40:02下载
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