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Apr 06, 2026

Do you know what 3D Mapping is?

3D Mapping is the core technology of outdoor architectural projection, which can project onto the surface of objects in any medium and turn the surface of the objects into animation to achieve a perfect integration of objects and animation, thus creating a strong sense of visual impact.

Apr 05, 2026

What is resolution? What does resolution mean?

This word is believed that as long as you are familiar with the digital field, you will not be unfamiliar with it. Resolution is the precision of screen image, which refers to the number of pixels displayed by the display. Since the dots, lines and surfaces on the screen are all composed of pixels, the more pixels the display can display, the finer the picture will be, and the more information can be displayed in the same screen area, so the resolution is one of the very important performance indicators. The whole image can be thought of as a large chessboard, and the resolution is expressed by the number of intersection points of all longitude and latitude lines.

Apr 04, 2026

How does the projector work?

The working principle of the projector is based on the fusion of optical and electronic technologies.

Apr 03, 2026

What is Chip?

A chip is a tiny circuit board made of semiconductor materials such as silicon on which a large number of electronic components, such as transistors, capacitors, resistors, etc., are integrated.

Apr 02, 2026

The difference between nfc and Bluetooth

Cell phone NFC and Bluetooth has now been very widely used, the principle is the radio transmission technology, but they have a fundamental difference.

Mar 31, 2026

What is the hosts file? Where is the hosts file?

The hosts file is a file responsible for IP address and domain name express resolution in Windows system and is saved in ASCLL format.

Mar 30, 2026

Differences between SSDs and HDDs

SSDs have been sold for a long time. However, at present, mainstream installations are still purchasing traditional mechanical hard disks, while most SSDs are installed in high-end configurations. Due to the small capacity and high price of SSDs at present, few mainstream users choose SSDs. However, with the development of technology, it is also a trend that SSDs gradually become mainstream. Next, we will introduce the advantages of SSDs and the differences between SSDs and ordinary HDDs.

Mar 29, 2026

What are "Other" and "Other System Data" on iPhone and how do I clean them up?

After using iPhone for a long time, you will find that more and more storage space is taken up, especially for the "Other" item, which tends to take up more and more space.

Mar 25, 2026

What exactly does a secure eject USB do?

When the "device in use" message appears when ejecting a USB flash drive, it is usually due to a program using files from the device. To do this, we need to close the program or window that is using the data on the USB drive and then try to eject it again.

Mar 23, 2026

What is the subnet mask

Subnet mask is also called network mask, address mask and subnet mask. It is used to indicate which bits of an IP address identify the subnet where the host is located and which bits identify the bit mask of the host. The subnet mask cannot exist alone. It must be used in combination with the IP address. The subnet mask has only one function, which is to divide an IP address into two parts: network address and host address. The subnet mask is the basic knowledge that everyone who uses the Internet must master. Only by mastering it can you truly understand the TCP/IP protocol settings. Let's explain what subnet mask is in simple terms.