1. Pronunciation: y √ NX √ n.
2. Source: Yuan Zhen's Poems of Lotte Southeast in the Tang Dynasty: "Gathering stolen letters, passing arrows as symbols." "Yuan Zhang Dian Fourteen Cheats of the Ministry of Punishment": "The Chinese book saves the province of cheating and engraving, and the Chinese book saves the seal." In the seventy-first session of Shi Naian Water Margin in the Ming Dynasty, Zhongyitang, Shijie, the hero of the astronomical water margin, hosted a banquet by Song Jiang that day, personally held the seal of the military symbol and issued a decree.
Chapter 38 of Wu's The Scholars in Qing Dynasty: You brought this woman, and gave this piece of mine to other local officials when we met in the county, so that it should be sealed. In the Qing Dynasty, Huang Jingren's poem "Printing the Title of the Hall" said: "I only print letters to get the meaning of the book." Wu Yunduo's dedication and consciousness to the party: "Managers are cleaning up official documents and printing letters."
In the Ming Dynasty, Tang Xianzu's Purple Hairpin Story Yan Media Persuades Widows: "Who dares to be born in me when three seals are in power?" Qing Zhao Lian's Continued Recording of Xiao Ting: Some Matters: "In the last years of Qianlong, Wang Ding took photos of Wu Jin many times and wrote letters."
Seal the letter and make sentences:
1. The doorman wouldn't let them in because the letter of introduction was not stamped.
2. The right channel watermark signal is white noise, the amplitude of which is limited to the auditory threshold for controlling the detection threshold.
This agreement is signed and sealed by him.
4. Finally, the virtual image containing watermark information is obtained by inverse wavelet transform, and a new set of control vertex coordinates can be obtained according to the pixel values in the virtual image.
The console can also print information for us through the console typewriter.
6. Typing telegraph is actually a machine that transmits printed information on telegraph circuits.
7. When extracting the watermark, the audio signal containing the watermark signal is also subjected to piecewise discrete cosine transform, and then the watermark is extracted by using the original audio signal.
8. Talk about an examiner who asked, if you can look it up, she will give you a printable letter.