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The circuit shown in the figure is a three-digit tachometer used to measure low frequency signals with a repetitive time interval of 0.235 to 15 seconds. The tachometer has a speed range of 4 to 255 r...[Details]
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Preface
Sleep apnea is a very common sleep breathing disease. According to research, about 24% of adult men and 9% of adult women, or more than 2 million people, suffer from this disease ...[Details]
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WiMax technology needs to demonstrate its advantages in specific application scenarios in order to gain market recognition, which requires application testing to measure system performance para...[Details]
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introduction
Like other
portable
electronic products,
blood flow parameter detectors
need to be small, thin, durable, reliable, and have a long standby time. Therefore, system desi...[Details]
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Preface
For a long time, SD cards with Flash Memory as storage have been widely used in consumer electronic products due to their small size, low power consumption, erasable and non-volati...[Details]
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FSK (Frequeney-Shift Keying) uses carriers of different frequencies to transmit digital signals. FSK signals have the advantages of strong anti-interference ability and long transmission distance, and...[Details]
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0 Introduction
GaAs photocathode is a negative electron affinity photocathode with the advantages of high quantum efficiency, concentrated energy and angle distribution of emitted electrons. T...[Details]
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Focus shift problem
Visible light and infrared light have different wavelengths, so the imaging focus is not on the same plane, which results in a clear image under visible light condition...[Details]
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0 Introduction
In modern industrial production and scientific and technological research, various data usually need to be collected. The commonly used data acquisition board collection met...[Details]
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Electrochemical Principles of Blood Glucose Measurement
The electro-biochemical principle of blood glucose measurement is that when a certain voltage is applied to the blood after the enzy...[Details]
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As modern cities develop towards multi-functionality, urban layouts become increasingly complex, with hundreds, even thousands of ground monitoring points. To ensure that functional departments can...[Details]
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0 Introduction
With the rapid development of modern science and technology and the progress of society, service robots are becoming more and more closely connected with people's lives,...[Details]
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With the deepening of energy crisis and environmental pollution, the research and utilization of solar energy has received widespread attention. Solar energy is an inexhaustible renewable energy so...[Details]
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DigRF is poised to replace the two main forms of data communication paths between RF and baseband semiconductor devices: analog signaling, and proprietary digital signaling (parallel or serial) for...[Details]
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introduction
With the development of electronic technology, the anti-theft alarm system has evolved from the original simplification and localization to intelligence and integration. At pr...[Details]