[PConline News] Today 4K resolution flat-panel TVs have become the mainstream of the market, which has also promoted the popularity of 4K ultra-high-definition programs. In addition to some 4K resources built into smart TVs, it is also a lot to get more 4K videos through an external set-top box. A user's choice, so there is a foreign investigation agency released a research report for 4K ultra-high-definition set-top box.
Recently, ABI Research, a well-known market adjustment agency in the United States, issued a research report on 4K ultra-high-definition set-top boxes. The report shows that by the end of 2016, the demand for 4K TV set-top boxes will increase exponentially, and the EU will also promote 4K TVs in an all-round way. Set-top box.
According to the research report released by ABI Research, the global 4K ultra high definition set-top box has a market share of about 2 million units in 2015. It is estimated that by the end of 2016, the market share of 4K set-top boxes will reach 7 million units. Even at the end of 2021, this number will increase by 46%, or about 10.22 million units.
The research report also pointed out that the market share of the traditional 1080P Full HD set-top box is gradually declining. However, it is worth noting that as early as 2010, China has successfully surpassed the United States to become the world's largest set-top box market. The survey agency is very optimistic about the development prospects of 4K ultra-high-definition set-top boxes. As the technology continues to mature, 4K set-top boxes supporting HDR technology will be more favored by the market.
There are already countries in Canada, Russia, and other countries that have conducted 4K ultra-high-definition television pilots. However, in China, ordinary television resources are far from popular to the level of 1080P. Talking about 4K set-top boxes is a bit far away, and for 4K resources In terms of Internet TV boxes, online viewing of 4K video demands more on the Internet. At least, the author has no desire to watch an online 4K video while the video is constantly showing up.
Ultrasonic waves propagate in the liquid, causing the liquid and the cleaning tank to vibrate together at the ultrasonic frequency. When the liquid and the cleaning tank vibrate, they have their own natural frequency. This vibration frequency is the sound wave frequency, so people hear the buzzing sound. With the continuous development of the cleaning industry, more and more industries and enterprises have used ultrasonic cleaning machines. The advantages of the ultrasonic cleaning machine are: the ultrasonic cleaning effect is good, and the operation is simple. The sound that people hear is a sound wave signal with a frequency of 20-20000 Hz. The sound wave above 20000 Hz is called an ultrasonic wave. The transmission of the sound wave propagates longitudinally according to a sinusoidal curve, producing a large number of small bubbles. One reason is that partial tensile stress occurs in the liquid to form negative pressure. The decrease in pressure makes the gas originally dissolved in the liquid supersaturate and escape from the liquid and become small bubbles; the other reason is that the strong tensile stress tears the liquid apart. "A void is called cavitation.
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