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Jiwei.com reported on December 28 that Lei Jun recently wrote that in response to the call for environmental protection of science and technology, the Xiaomi Mi 11 will no longer come with a charger ...[Details]

Let me ask you, from a small plastic box of a few dozen yuan (a joke for low-quality speakers) to a high-end speaker of thousands of yuan, are there any products that suit your taste? Maybe you are...[Details]

In power converter applications that pursue high conversion efficiency, the LLC resonant power converter circuit architecture using LLC resonance has become quite popular in recent years due to i...[Details]

introduction Sensor network is a new research field in computer science and technology. The sensor network formed by integrating sensors, micro-electromechanical systems and networks is a new informa...[Details]

　　introduction 　　During the optometry process of the comprehensive ophthalmometer, users will set some system configuration parameters according to different test needs and habits, and these parame...[Details]

　　1 Introduction 　　Last year, the early symptoms of SARS that was prevalent in some parts of China were high fevers above 38oC (except for a few chronic patients). Infrared thermometers can provide a...[Details]

After Apple released the AirTag smart tracker, many privacy advocates worried that it would be used improperly. In the company's rational vision, AirTag can help people better locate easily lost obje...[Details]

The sound that people can hear is produced by the vibration of objects. Its frequency is in the range of 20HZ-20KHZ. The sound exceeding 20KHZ is called ultrasonic wave, and the sound below 20HZ is...[Details]

When developing battery-powered devices, especially systems with strict requirements on the standby or operating time of the device, such as mobile phones, it becomes increasingly important to reduce...[Details]

After referring to the simple study of the 51 MCU Keil C delay program , I also tested and calculated some existing delay functions. Here, it is assumed that the clock frequency of the MCU is 12MHz...[Details]

According to foreign media reports, electrical engineers at the University of California San Diego have developed a method to improve the imaging capabilities of existing radar sensors, allowing them...[Details]

The traditional phrase "73" predates the early days of the wired telegraph. It is found in some of the earliest digital telegraph codes, and while some versions have different definitions, they al...[Details]

As one of the big bull stocks in the Science and Technology Innovation Board and even the entire A-share market in 2020, Stone Technology's share price soared from a low of just over 300 yuan per sha...[Details]

There are five operating modes of ultrasonic thickness gauge. When technicians use ultrasonic thickness gauge, they are general measurement method, accurate measurement method, continuous measurement...[Details]

In the domestic capital market, the New Third Board has never had a clear positioning. Due to the large number of New Third Board companies, but the market transactions are not active, the value of m...[Details]