Raw leather HS code references

List of contents of this article:

• 1,Raw leather HS code references What is the optical system ii
• 2, Telescope'sPrinciple, and optical path diagram
• 3, Ren Zhengfei responded domineeringly to the U.S. ban. Without the help of the United States, can the system alone be far ahead...

What is the optical system ii

1. Optical system II (photosystemM II complex, PSII complex) is a photosynthetic unit in a cystic membrane, which contains two photocaptrator complexes and a photoreaction center.

2. Optical system II, also known as PSII, is also a protein complex located in the chloroplast capsule membrane, which is composed of many different proteins and auxiliary factors, including P680, chlorophyl a, chlorophyll b, carotenoids and calcium ions.

3. Optical system 1, that is, the photoreaction stage, the pigment in the capsule-like film absorbs sunlight and conducts photolysis of water and the synthesis of ATP. Light system 2 is the dark reaction stage, in which C3 is reduced and CO2 is fixed in the chloroplat matrix.

4. PSII is the optical system II, that is, the P680 optical system II is the first link in the photosynthesis process.It can absorb photons and then use light energy to excite electrons from H2O molecules.

5. Similarities and differences between two optical systems: the same: two optical reaction systems, namely optical system I and optical system II.

6. You mean the optical system in photosynthesis. Light system: a multiprotein complex in photosynthetic organisms that can absorb light energy and convert it into chemical energy. It is divided into optical system I and optical system II, each of which is composed of chlorophyll-containing photo-catching complexes and chlorophyll-containing reaction centers.

The principle of the telescope, and the optical path map

The principle of the telescope: The telescope can enlarge the very small angle of distant objects at a certain magnification, so that it has a large angle in the image space, so that it cannot be seen or distinguished by the naked eye. The object becomes clear and recognizable.

△ (Kepler telescope) The focal length of the objective lens is long, and the function is to make the object in the distance within the focus of the eyepiece, close to the focal point to form an inverted and reduced real image; the focal length of the eyepiece is relatively short, which is equivalent to a magnifying glass, which is used to enlarge the real image. Compared with the real image, it is upright and magnified. Virtual image.

Galileo telescope means that the objective lens is a convergent lens, and the eyepiece is a telescope with a divergent lens. The real image formed by the refraction of the light through the objective lens is on the focal point behind the rear of the eyepiece (close to the human eye). This image is a virtual image of the eyepiece, so it is refracted into a magnified upright virtual image.

As the name implies, a refracting telescope adopts the principle of refraction of light to gather light.Early telescopes generally used a convex lens, but this introduced a problem of chromatic aberration.

The external structure diagram of the astronomical telescope is as follows: the internal structure diagram of the astronomical telescope is as follows: the imaging principle of the astronomical telescope is as follows: the object passes through the objective lens, and the distance is greater than twice the focal length, forming an inverted and reduced real image. The real image is through the eyepiece, within twice the focal length of the eyepiece, forming a upright and enlarged virtual image.

Ren Zhengfei responded domineeringly to the U.S. ban. Without the help of the United States, can the system alone be far ahead...

In fact, in an interview, Ren Zhengfei did not condemn the United States like ZTE, nor did he complain about being treated unfairly, but responded domineeringly. For the ban of the United States, Ren Zheng It is not to say that it does not have much impact on Huawei, because Huawei has a spare tire plan.

And in 5G, optical system and core network, Huawei is absolutely ahead of the United States and does not need any help from the United States.

What else needs to be done: In fact, Ren Zhengfei's interview not only revealed his Huawei strength, but also some requirements for the future, especially many areas that cannot be solved by Huawei itself.For example, for the cultivation of talents, Ren Zhengfei mentioned education, which obviously requires the whole society to reach a consensus and carry out more in-depth reform.

But the current situation is that the 5G technology of international communication giants, including Ericksson and Nokia, has a big gap with Huawei, and the 5G technology of the United States is even less powerful. The imbalance in technical strength has affected the prosperity of the global 5G market, which is not in Huawei's interests. One concept is Huawei's "interest sharing".