Using Secondary Diagonal to Find the Determined
For the secondary diagonal determinant, there is a formula: the value of the secondary diagonal determinant is equal to the product of the secondary diagonal elements multiplied by the product of the secondary diagonal elements,{(-1)^{\frac{n(n - 1)}{2}}}. When calculating the n-th order determinant, if it was a secondary diagonal determinant, this formula could be used to solve it. For example, in a third-order determinant, if the product of the main diagonal element was deducted from the product of the secondary diagonal element according to Salos 'rule (diagonal rule), and when using the secondary diagonal element to calculate, the sign rule (here, the basic properties of the third-order determinant, such as "n = 3","((-1)^{" frac{3 "times (3 - 1)}{2}}= (-1)^3 =-1"), were taken into account to accurately calculate the value of the determinant. Read more exciting novels for free
The Multiplication Formula of Diagonal Determined
The calculation formula of the diagonal determinator was: D = (-1)^t(n, n -1,1)a1, and its value was the product of n elements on the main diagonal (because the determinator value was equal to the algebraic sum of the products of numbers on different rows and columns, and in the diagonal determinator, only the main diagonal had numbers that were not 0, and the rest of the products had factors of 0, that is, the products were all 0). It could also be calculated by descending the order from the first row. The first time it appeared (-1)^(n + 1), the second time it appeared (-1)^n, the third time it appeared (-1)^(n - 1),…the last time it appeared (-1)^3. The symbol of the coefficient was (-1)^((n + 1)+n+…+3)=(-1)^(((n + 1+3)(n - 1)/2)=(-1)^(n(n - 1)/2). In addition, if the first row and the last row were exchanged, the determinant value would change sign, and then the second row and the penultimate row would be exchanged. If n = 2k (k is an integral number), it would become an ordinary diagonal matrix after k exchanges. If n = 2k - 1, it would become a diagonal matrix after (n - 1)/2 exchanges. Multiplied by-1 with each exchange, so the result is that if n = 2k, the determinant =(-1)^(n/2)s (s equals the product of all negative diagonal elements); if n = 2k - 1, the determinant =(-1)^((n - 1)/2)s (s equals the product of all negative diagonal elements). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Block Matrix Principal Diagonal Determined
The block matrix could be decomposed into multiple submatrices. When it is a block diagonal matrix (the sub-blocks on the non-main diagonal are all zero matrices, and the sub-blocks on the main diagonal are all square matrices), the determinant is equal to the product of the determinants of the sub-blocks on the main diagonal. However, the block matrix does not satisfy the diagonal rule in the calculation of ordinary matrix determinants (that is, the determinant of a matrix is equal to the product of the elements on the main diagonal minus the product of the elements on the secondary diagonal). When calculating the determinant of the block matrix, when the k of a row is multiplied to another row, it must be left multiplied by k (right multiplied by k when the column is changed), and the determinant is calculated as "((-1)^{mn}"| A|| B| (Assuming that the relevant block matrix is in the appropriate A, B form and the order is m, n, etc.) For example, in some mathematical problems, when using the block matrix to deal with or prove related content, the calculation property of the main diagonal determinant of the block matrix could transform high-level matrix operations into low-level matrix operations, which simplified the calculation process. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Using Diagonal Formula to Find the Volume of Polygon
Polygon had no volume, and only polyhedron had a volume solution, so the diagonal formula could not be used to calculate the volume of the polyhedron. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the novels written using the main and secondary lines?
I recommend "Turn, Give, and Leave." Come on, this author's short stories are awesome. This was the last of his trilogy of short stories, and it was in the same series as " Light, Short, Scattered " and " Soft, Melted, Matter." Half sci-fi with a brainstorming direction, it was a turning point, full of renunciation and bizarre plots. The male lead was Luqiao, and the story had all kinds of reversals. Although it was updated every month, the quality was extremely high. His previous works were already very interesting, so he put this book on the reading list without reading it. 'The Strange Exorcist' was not bad either. It was a mystery novel written by Gengchen Xinsi. The male lead, Xia Min, was 25 years old. He had a mean mouth and a sense of justice. He kept saying all kinds of dirty words. The story had elements such as witches and the Black Death. The plot was serious and mischievous. It was a must-read for Zuan people and was very funny. There was also " The Unchained Female Lead ", a fantasy romance novel written by Ye Weirui. The female protagonist went from a useless white-collar worker to a loose female protagonist in the world of female deities, deducing the growth history of a spiritual loser in another world. " Wenwei Chronicle " was an ancient romance novel written by the vegetable vendor Ah Jiu. It was the story of a female otaku who had changed into a virgin. The first three volumes were heavy, but the fourth volume was very happy. " God Deification: I, Kong Xuan, Will Never Enter the West " was a Xianxia novel written by the bright moon reflecting the river. The male protagonist, Kong Xuan, traveled to the period of the God Deification War and survived in Jie School. The characters in the novel were very interesting. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diagonal composition photography
Diagonal composition is a photography composition method. It has the following characteristics and application methods: ** I. The definition of diagonal line composition ** 1. ** Line Form ** - The main image in the picture was presented as a slanted line. This kind of inclination was not necessarily slanted to the extent of a diagonal line, but it could also be slightly slanted, or almost horizontal but a little slanted. - An oblique line was not necessarily formed by an actual line. It could also be formed by two points. For example, if there was an object in the upper left corner and an object in the lower right corner, if there was a potential connection between the two, the brain would imagine that there was a line between them. This was also considered an oblique line composition. 2. ** Different from other compositions ** - Compared to the tranquility of the horizontal line composition, the diagonal line composition was dynamic, lively, and gave people a sense of infinite vitality. Compared with the vertical line composition, the vertical line composition emphasized seriousness and tranquility, while the diagonal line composition emphasized dynamic effects. ** 2. Character and emotional expression of diagonal composition ** 1. ** Dynamic and energetic ** - It was more dynamic than the horizontal and vertical lines. It was like a pencil that was standing on the table and falling down. It could bring about kinetic energy, showing a lively, young, energetic, innovative, hopeful, powerful, sharp, and so on. - For example, when shooting plants, the diagonal composition could be used to show the state of the plants growing upwards. When there was a breeze blowing, the diagonal composition could increase the movement of the picture to make it lively and interesting, and the plants looked cute and cute. 2. ** Adaptability of the theme ** - The emotion of the slash had to be compatible with the theme. If the theme needs to reflect the dynamic, dynamic, or unstable emotions, you can use diagonal composition; if the theme is quiet and stable, it may not be appropriate to use diagonal composition, but there are special circumstances, such as adding diagonal elements to create unexpected effects in quiet scenes to avoid excessive boredom. ** 3. Shooting Techniques for Diagonal Line Composing ** 1. ** Searching for slash elements ** - Directly look for diagonal elements in the shooting scene, such as the handrails in life, the wires in the sky, etc., which are originally horizontal lines. When you approach one end and use an upshot or an upshot, they will act as diagonal lines in the picture. 2. ** Create a slash effect ** - You can rotate or tilt the camera to turn the original horizontal and vertical lines into a diagonal line. This method is generally used when shooting from above or below. However, it was rare to tilt the camera when shooting straight ahead because it might make the audience feel unstable. However, in documentary photography or news photography, if you wanted to express a sense of panic, you could tilt the camera slightly to make the horizon crooked to serve the theme. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to level the diagonal
If the leveling of the indoor wall involves diagonal leveling, the base layer interface must be treated first. The dust, dirt, oil stains, etc. on the surface of the base layer must be cleaned up. The gray joints of the building blocks must be treated in advance. The uneven parts between different matrixes must be polished and repaired in advance. The vertical deviation and smoothness of the wall must be checked with a hanging wire. After the floating soil on the wall surface is cleaned, it must be watered repeatedly.(The watering order is from top to bottom. The watering amount should be 8 - 10mm deep into the building blocks and should be carried out one day before the plaster. If the wall is still dry during the plaster, you can spray water again, but there is no floating water on the wall during the plaster.) Then, set out and mark to determine the thickness of the plaster (the thickness of the inner wall plaster should be about 20mm, and at least not less than 7mm). Stick the plaster cake first and then paste the plaster cake again (the distance between the plaster cakes should not be more than 1500mm and 30mm from the ground). When the plaster cake is dry, spread 100mm wide mortar between the plaster cakes and scrape it flat with a scraper bar (the thickness is the same as the plaster cake). After the mortar bar is slightly dry, the bottom layer of the plaster shall be plastered. Through these operations, the straightness and smoothness of the wall can be ensured, and the leveling in the diagonal direction can be indirectly realized. If the foundation cushion is leveled and repaired with a large height difference in the diagonal direction during construction, for example, when the cushion has a size of 3500* 3500mm and the height difference in the diagonal direction reaches 10cm, the surface of the cushion can be cleaned, and a new layer of C15 concrete can be placed on it. Leveling shall be based on the highest point of the original cushion, and the difference between the upper surface of the cushion and the designed elevation shall be measured (estimated to be no more than 10cm). Then continue to build the foundation. When doing the foundation, the height of the cushion layer will be deducted from the height of the upper step of the foundation, and the cross section of the upper step will be enlarged (if there is reinforcement in this part, the reinforcement will be changed accordingly). The size of each side can be the same as the height of the foundation cushion layer, so as to ensure that the elevation of the top surface of the foundation remains unchanged. If there is a problem with the smoothness of the floor tiles, but the master thinks that it is enough as long as the corners are flat, in this case, if the floor tiles are to be completely leveled, the master should generally pick up the floor tiles and lay them again when the cement layer has not completely shrunk and solidified. If the cement has solidified, the bricks may damage the floor tiles next to it. This situation is more complicated. There is no clear conventional treatment method. Special measures may need to be taken according to the actual situation, such as local adjustment of the height of the floor tiles. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diagonal angle of the cube
The two diagonal lines of the cube are in the same plane. Let the length of the cube be a, and the diagonal line of the cube be (<sqrt{2}a>>), the angle between the face diagonal and the body diagonal.(\alpha = \arctan\sqrt{2}\), get (alpha = 54.7356) degrees, the diagonal of the two bodies meet at a point to form two isosceles-shaped triangle, so the top angle of the isosceles-shaped triangle is the top angle.(The angle of the diagonal line)(<beta>= 180 - 2 <alpha>= 70.5288>) degrees; The angle formed by the diagonal and the bottom of the cube is <A>,<A>=<frac{1}><sqrt{3}>>=<approx0.5774>>,<A>=<arcsin0.5774>=<approx35.27 ^{<circ}>(The final result is kept in two decimals). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
86 boxes of diagonal length
The diagonal length of the 86 boxes (Type 86 wall interface box, square with a side length of 86mm) was about 121.6 mm. According to the Pythagorean theorem, the diagonal length is equal to 86 times the square root 2.(The value of the square root 2 is about 1.414), that is, 86×1.414 = 121.604 = 121.6 mm. If the 86-type wall interface box is considered as a square box (86 square box), its diagonal length is 148.96 mm. In addition, from the perspective of 8.6cm (86mm converted to centimeters), the diagonal length of the 86 wire box was about 12.15cm (calculated by d = tick (8.6 ^2 + 8.6 ^2)= 12.15cm). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
prismatic diagonal formula
The formula for the diamond-shaped area and the diagonal line is: If the diamond-shaped area is S, and the two diagonal lines are c and d, then S = cddiv2. There was no specific formula that could be directly expressed as the " diamond diagonal formula " to solve the length of the diagonal. However, if the area of the diamond and the length of one diagonal were known, the length of the other diagonal could be derived from this area formula. At the same time, the diagonal lines of the rhombus bisected each other vertically and bisected each set of diagonal lines. This property also helped to determine the quantities related to the diagonal lines in some geometric relations. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diagonal cross-section of a cuboid
The cross section of the opposite corner of the cuboid was rectangular. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>