How to judge the number of pleats and how to see the number of pleats

Here's a way to wrinkle it.

If it is not a part of the muscles or joints that move often, it is well maintained, and it is not old, there will be no wrinkles. 2. Human muscles should move frequently, such as talking, laughing, and opening and closing eyes, so the eyelids and the skin on the side of the mouth will be wrinkled; Human bones and joints also move frequently, such as the joints on each finger, elbows, wrists, knees and other parts. You clench your hands hard, and you can see that the ** on the joints is straightened and the wrinkles are gone; You stand up straight and tense hard, and you can see that the wrinkles of the ** in the inward bend of the knee are also flattened.

3. If you want to move, there will be expansion and contraction, if you keep a fixed shape or length, then how can you bend it? Because there is a connection with the muscles and bones inside. can only maintain one posture, how can that person still move and live?

4. The muscles and ** are elastic or elastic, such as rubber bands and balloons, and hold the balloon for a certain period of time after it is blown up, or repeatedly blow up and deflate, then, you see that the surface of the balloon must also be wrinkled. Another example is iron wire, if you fold it repeatedly, it will also become wrinkled. 5. Therefore, the wrinkle of ** is the part that is convenient for stretching for the muscles or bones it is associated with to bend and change shape.

I'm not a professional, I don't know how to look at it from a scientific point of view, I'm just saying it based on my own observations, judgments, I don't know if you can accept it.

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The number of pleats of the cloth can be subtracted from the original length of the cloth by the length of the pleats, and then the length of one pleat.

Looking at the figure, it can be seen that there are a total of 4 erosion surfaces, which have been eroded 4 times, the upper one and the lower three times, and the folds are formed because the lower 3 erosion squeezes are not parallel to the surface erosion surface. By observing the eroded rock layers, it can be found that there is a fold below that forms a fault after movement, and then the two erosion surface rock layers on the upper part are parallel, and it can be judged that they are formed by the same fold, so there are two folds in total.

The pleat rate generally refers to the pleat rate of the curtain, which is calculated by the following formula: pleat rate = width of the curtain fabric and width of the window*.

Expansion:

The width of the curtain fabric = the width of the window * 2 (2 times the fold is not much different from the double fold in terms of shading and sound insulation.) 2 times beautiful, times better, general household times can be).If the curtain is not made of a whole wall, measure the width of the window plus 15-30cm on each side of the window, so as to ensure that there is no light leakage on both sides of the curtain.

The length of half-height curtains is the height of the window frame plus 20-30 cm, and the length of floor-to-ceiling curtains is generally meters from the ground.

Fixed-height cloth curtain algorithm: the number of cloth meters = (actual width + times of the folds.)

Fixed-width cloth curtain algorithm: width = (actual width + times the width of the fold width;

Total number of meters = (actual height + number of sheets.)

The standard practice of curtains is: the fabric is 2 times, and the curtain is 2 times or 3 times (if you want to save materials, the yarn can also be made 2 times, but the effect will be affected).If the fabric is selected to be thicker and doubling, it is also possible, if the fabric is selected to be thin and only doubled, the effect is definitely not as good as 2 times.

1. Calculation method of casement curtain:

Window width + finished curtain width 2 finished curtain width Step width * curtain height = fabric required for curtains.

Such as: window width meters, high meters, cloth width meters with the number of meters of materials: ( m2,

Curtain head calculation method:

Width of the curtain head * 3 times the pleats Cloth width (meters) = number of widths * (height of the curtain head + edge-free) = number of meters of cloth required.

For example, the width of the curtain head is meters, and the number of meters of materials used for high meters is: meters * 3 meters = 5 that is, 5 pieces of cloth 5 * (meters) = meters.

The first method: 1 Measurement of materials The width of the finished product (track length).

The width of the curtain is measured for the width of the window plus 15-30cm on both sides of the window, so as to ensure that when the curtain is closed, there is no gap in light leakage on both sides, and when the curtain is opened, the light can fully enter.

The curtain is not the whole wall, and the measured width is the width of the wall, and the finished product is completed.

Half-height curtains are 20-30 cm higher than the height of the window frame.

The folds are easily recognizable if they are small in size and can be seen on a single rock outcrop. However, if the fold is large in scale and the deformation is strong (especially in the metamorphic rock area), it is difficult to identify the fold. The following aspects should be grasped when observing fold structures in the field:

a) Determination of bedding and sequence: First, it is necessary to recognize and identify the original bedding, and pay attention to distinguishing the stratigraphy from other secondary surface structures, which is the key to identifying the fold structure. On the basis of stratigraphic research, the age of the strata and the sequence of formation (sequence) are determined according to the sedimentary characteristics of the rocks, the characteristics of the rock strata assemblage and the paleontological fossils.

The primary layer of sedimentary rocks, bedding structures (such as oblique bedding, wave marks, mud cracks, scouring structures, grain sequence layers, etc.) and secondary small structures in the rock layers (such as small interlayer folds, interlayer splits, etc.) are used to judge the top and bottom surfaces of sedimentary rock layers, so as to find out whether the occurrence of rock layers and rock sequence are normal or inverted, and to determine the existence and development of anticlines and anticlines according to the relationship between repeated and symmetrical distribution of strata.

b) The folds and their types cannot be identified solely on the occurrence changes of the rock strata, and the conclusions drawn from this may be wrong. It is important to determine the existence of folds based on the regular symmetrical recurrence of lithology or contemporaneous stratigraphy, and then to determine the basic type of fold structure (anticline or anticline) based on the overlapping relationship between the old and new symmetrical layers of symmetrical recurrent strata.

c) The existence of folds can be determined by observing various secondary structures such as small folds and splits in the rock strata and their development sites, and the types of folds and their development locations can be judged according to their development sites.

d) Recourse marker layer: The so-called marker layer refers to the rock layer with small thickness, stable horizon and wide distribution, and obvious characteristics in terms of rock composition and structural structure or fossils contained. In areas with distinctly iconic rock formations, recourse can be made by planar or profile studies to discover variations in occurrences and symmetrical repetitions of the strata, thus determining the presence of folds and their type.

e) Determine the existence of fold structures and their distribution positions through the interpretation of sanitary or aerial films.