FM radio"An AM radio is a radio that uses an AM carrier to transmit radio signals. It had a shorter wave-length, and the transmitted signal was better than a radio that used AM wave-length transmission signals, but the transmission distance was shorter. Its working principle was to convert the audio signal into radio waves with a changing frequency (the changing frequency was proportional to the amplitude of the audio signal), and the receiver restored the original audio signal by detecting the frequency change. Some mobile phones had the function of an AM radio, and there was also a special AM radio app. It had features such as super smooth, super clear, and super low data consumption. It supported 2G, 3G, and wifi. There were many types of radio stations such as domestic news, urban emotions, and music. It played 24 hours a day. There was also a high-end radio that could be placed in his pocket. It could receive short-wave, medium-wave, and foreign channels. The volume was high, the signal was good, and there was no noise. It could be plugged in with headphones. It had a built-in changeable battery or a large-capacity lithium battery. It could be used for three days and three nights on a single charge. In addition, the radius of the AM radio transmitter was more than 100 kilometers, which was also of great significance in the car radio. For example, in remote areas or when the power was interrupted, the car owner could use it to receive external information. Its signal penetration was strong, and it could be stably transmitted in complex environments. It could play an important role in information transmission when dealing with electromagnetic pulse attacks. China and the United States promoted the return of car radio based on various considerations.
"Journey to Gaoyang" is equally exciting. Everyone is welcome to click and read it! "
Bird documentary static and dynamicHere are some of the static and dynamic aspects of bird documentaries:
** 1. Dynamic aspects **
1. ** Flight and migration trends **
- In "Birds of Migrations," the journey of migrating birds to the south and north was shown through the camera, such as the swan's persistence in life flying over 1200 kilometers, and the sand crane's search for a way out in the sandstorm. This documentary showed the flight attitude of birds during migration and the changes in group formation from different angles. The filming took more than three years, with 17 pilots and two scientific expedition teams. The scenes covered more than 50 countries and regions around the world, and the film was more than 460 kilometers long. The images selected from so many materials presented the movements of birds during long-distance migration.
- "Bird's Eye View of the Earth" was personally piloted by the migrating birds, taking the audience to fly over many places and showing the flight dynamic of birds in the natural environment. The shooting time was more than three years, crossing six continents on Earth and reaching more than 40 countries. This kind of long-term and large-scale shooting could capture the dynamic images of birds flying in different areas.
2. ** Daily activities **
- The whale-headed stork mentioned in "The Difficult Road to Survival of Lungfish" had feet that were different from the webbed feet of ordinary waterbirds. Instead, they had thin claws that were separated independently. This structure allowed them to track their prey in the water silently. The documentary could capture the dynamic images of their daily activities such as swimming in the water, walking in the swamp, standing still for hours, and so on. At the same time, the weavers in the film chose grass to build their nests and lived near the water, which could also show the daily dynamic behavior of birds building nests.
3. ** Dynamic in the ecological environment **
- The documentary, Birds in the Forest, launched by Shanghai Gongqing Forest Park, might show the movements of birds in the ecological environment of the forest, such as birds shuttling through the woods, foraging, interacting with other creatures, etc. There were more than 290 species of birds living in the Weishan Lake National Park. If there was a documentary about the birds here, it might show the movements of the birds in the environment, such as flying over the lake and resting in the reeds. Tiaozini was a well-known "paradise for birds." The documentary "China's Marshlands that Connects the World" used Tiaozini as the main location to show the movements of birds in Tiaozini, which was a coastal marsh. It showed scenes such as foraging in the shallows and living in groups with other birds.
4. ** The dynamic of the shooting technique **
- In the documentary "China's Marshlands Connecting the World," the production team used microphotography, underwater photography, infrared thermal imaging, remote control wireless photography, and other new technologies that did not disturb the ecological filming. Underwater photography could capture the movement of birds in the water, such as the moment of hunting in the water; microscopic photography could show the microscopic movement of bird feathers or the movement of the tiny creatures they hunted; infrared thermal imaging could show the movement of birds in different temperature environments; remote wireless photography could record the natural movement of birds from different angles without disturbing them.
** 2. The static aspect **
1. ** The static presentation in painting **
- Birds of America, which was mentioned in the documentary, included 435 watercolors of birds drawn by Audubon himself. The illustrations in the book were drawn according to the true scale of the birds. These paintings were a static artistic presentation. Through the painter Audubon's brush strokes, they captured the various living situations of birds. From a static perspective, they showed the appearance, feather color, habitat posture, and so on. Although they were static, they were lifelike.
2. ** Freeze-frame footage in a documentary **
- In all kinds of bird documentaries, in order to explain certain characteristics of birds or to create certain artistic effects, there would be some frozen images. For example, there might be a still image of birds protecting themselves in the ice and snow to highlight the difficult situation the birds were facing at that time, or the unique feathers of the birds might be frozen so that the audience could observe them more clearly.
"The Island of Life" is also a wonderful novel. Everyone is welcome to read it!
Rico Gill you summon me to come over for dinner tonight at work. FM DHL will sell FM all FM FM wax paper and the FL studio is it a novel about a year or so I don't know if you want to earn it back. Fun DJ Blend the same way