XYZ and Ethereum

1. XYZ is better, because it's easier to read. It's usually easier to take some domain names that are easier to read or remember. It's impossible to take those that are more complex, so I think XYZ is better

3. 10. Y, Z motion is the robot moving along the XYZ direction of TCP, a, B, C motion is the robot rotating around the Z, y, X direction of TCP

4. It's color mode RGB color mode: color attribute: in short, it's the color of everything in nature (you understand it first). RGB color mode is a color standard in the instry. It obtains various colors by changing the three color channels of red (R), green (g) and blue (b) and superimposing them. RGB is the color representing the three channels of red, green and blue. This standard covers almost all the colors that human vision can perceive, It's one of the most widely used color systems at present. What's related to our computers is that most of the current displays adopt RGB color standard, which is why it's so important to us. On the monitor, the colors are proced by the electronic gun hitting the red, green and blue light emitting electrodes on the screen. At present, computers can generally display 32-bit colors, with more than one million colors. If the color it shows can not completely match a certain color in nature, it is almost indistinguishable from our naked eyes. Application scope of computer design: display, RGB color printing, RGB color spray painting, etc. Uniqueness: rich and full color, but can not carry out ordinary color separation printing. Color mixing setting (additive mixing): RGB is designed according to the principle of color luminescence. Generally speaking, its color mixing mode is like red, green and blue lamps. When their light overlaps with each other, the colors mix, but the brightness is equal to the sum of the two brightness (the brightness of the two lamps!), The higher the mixing, the higher the brightness. Colored light can be diluted and brightened by achromatic light. If blue light meets white light, the result is a brighter light blue light. After knowing its mixing principle, it is easy to understand how to set the color in the software. For the superposition of red, green and blue lights, the brightest superposition area of the central three colors is white. The characteristics of additive mixing: the more superposition, the brighter. Red, green and blue are three color channels. Each color is divided into 255 levels of brightness. At 0, the "light" is the weakest - it is turned off, and at 255, the "light" is the brightest. When the values of the three colors are the same, it is a colorless gray color, and when the three colors are 255, it is the brightest white, and when the three colors are 0, it is black. Color attribute of CMYK color mode: in short, it is the color specially used for printing. It is another color standard specially set for the printing instry. It can get various colors by changing the four colors of cyan (c), magenta (m), yellow (y) and black (k) and their superposition. CMYK represents the four printing ink colors of cyan, magenta, yellow and black, and is also the color of the four channels in Photoshop software. Specific to printing, it proces colors by controlling the overlapping printing of cyan, magenta, yellow and black inks on the paper, and the number of colors is less than RGB. Application scope of computer design: four color printing, four color printing, etc. Unique features: the color is not as rich and full as RGB color, it will run slower than RGB color in Photoshop, and some functions will not be able to use, because the number of colors is less than RGB color, when the image is changed from RGB color to CMYK color, there will be some loss of color (from CMYK to RGB, there will be no loss), but it is also the only color standard that can be used for four-color separation printing. Color blending setting (subtractive blending): CMYK is designed based on the principle of light reflection, so its blending mode is just opposite to RGB, which is & quot; Subtraction mixing & quot; When their colors overlap with each other, the colors mix and the brightness decreases. Why is that? After four different inks are superimposed on white paper, because the ink is transparent, most of the light will pass through the ink and shoot at the paper for the first time. The reflection rate of white paper is high. Most of the light will pass through the ink and shoot at the eyes for the second time, At this point, the transmission of light on the ink proces a color effect. In fact, at this time, it's like looking at multiple overlapping colored glass. If the light passes through more than one layer, the brightness will decrease, and the colors will also mix with each other. In the superposition of cyan, magenta and yellow, the superposition area of the central three colors is black. The feature of subtractive mixing: the more superposition, the darker. In the software, cyan, magenta, yellow and black channel colors are calculated according to the percentage. When 100%, they are the darkest, and when 0%, they are the lightest. Black and color mixing have little to do with each other. Most of its existence is for the convenience of adjusting the brightness of colors (and in printing, there are many opportunities for using single black). As with additive blending, the same tricolor value is a colorless gray color

5. XYZ represents horizontal and vertical coordinates and elevation of plane coordinates respectively
longitude and latitude are geographic coordinates and spherical coordinates
both of them can be transformed through certain mathematical model

6. By introcing the three roots of the equation T ^ 3 - (x + y + Z) T ^ 2 + (XY + YZ + XZ) t-xyz = 0 into x and multiplying both sides by x ^ n, we can get x ^ (n + 3) - (x + y + Z) x ^ (n + 2) + (XY + YZ + ZX) x ^ (n + 1) - xyzx ^ n = 0
for y and Z, we can get the same formula, add the three formulas and merge the same term, using the known x + y + Z, XY + YZ + ZX and XYZ are integers, we can recursively prove that x ^ n + y ^ n + Z ^ n is an integer

7. XYZ is mathematics
ABC is English

8. He was one of the methods of calling the king. The XYZ phantom is an original way of calling the outside "X summons / exits", "XYZ summon", the name of the body in the body, "super quantity." The XYZ is an XYZ shackle of the XYZ monster. The partial XYZ is used by XYZ material, and it is possible to use the multiplex limit system, and it is effective to use it, and the XYZ calling is the main calling method in the short time The main mainstream calling method of Zou The main XYZ dimensional calling method in the medium
< > >

9. The positioning of fun is more entertainment oriented. XYZ has no special meaning, but it also has a good memory. The price of fun is much cheaper than XYZ. On yuminghome, the former is 29 yuan, while the latter is 8 yuan.