What is the spatial distribution of heavy metal elements 20

It is to establish a spatial Cartesian coordinate system and then represent it one by one.

I think it's a kind of diagram that can intuitively see the distribution of heavy metal elements on a three-dimensional map, hehe!

It's a three-dimensional diagram of space.

Personally, I think that a three-dimensional graph is drawn and then marked on the three-dimensional map according to the degree of pollution.

Functions must be made of their own.

Then it is necessary to find out the points of the corresponding block and see what color it is mainly focused on.

It is to establish a Cartesian coordinate system.

Let's take a look at the GIS system, I don't know much about it.

It seems to have something to do with functions.

I also have this question, and I hope that there will be a big answer to it.

Mathematical modeling, I don't know.

How do you get a three-dimensional spatial map???

A 3D diagram is OK? Then consider the altitude.

The influence of altitude is ruled out first.

The first question has been resolved. The landlord, no pressure.

And so you participated in the Mathematical Modeling Competition.

That is, to draw a two-dimensional plan.

The spatial distribution of metallic elements refers to the difference in their unit cell types.

A unit cell is a parallelepiped unit that completely reflects the chemical-structural characteristics of the atoms or ions in a crystal in three-dimensional space. Among them, the one that can maintain the symmetry of the crystal structure and the smallest volume is called "unit cell", but it is also often referred to as unit cell. Its specific shape and size are characterized by its three sets of edges a, b, and c, and the inter-edge angles, collectively known as "unit cell parameters"), which correspond to the unit parallelepiped in the space lattice.

The unit cell is a representation of a crystal and is the smallest unit in a crystal. When the unit cells are juxtaposed, the crystals are obtained. The representativeness of unit cells is reflected in the following two aspects:

One is to represent the chemical composition of the crystal; The second is to represent the symmetry of the crystal, that is, it has the same symmetry elements as the crystal (axis of symmetry, symmetry plane, and symmetry center). In general, unit cells are parallelepiped. The whole crystal can be seen as a seamless juxtaposition of countless unit cells

Gapless – There is no gap between adjacent crystals and juxtaposition – all unit cells are arranged in parallel and have the same orientation.

There are five types of Bravi lattices in the two-dimensional plane, two axes A1, A2, and angles. Crystal cell.

Oblique lattice: Any crystal axis A1 and A2 can only remain unchanged if they are rotated or 2. Square lattice, hexagonal lattice, rectangular lattice, centered rectangular lattice, but there is a lattice point in the middle of the rectangular lattice, and there are two ways to draw it.

There are seven major crystal systems in the three-dimensional plane of the Bravi lattice, and the 14 kinds of crystal lattices are triclinic crystal system, monoclinic crystal system, orthorhombic crystal system, tetragonal crystal system, cubic crystal system, trigonal crystal system, and hexagonal crystal system. There are a total of 14 lattices according to the simple, body-centered, face-centered, and bottom-centered.

The unit cell is the basic unit that describes the microstructure of a crystal, but it is not necessarily the smallest unit. There are two types of unit cells: prime unit cells and complex unit cells. The prime unit cell, symbol p, is the smallest unit in the microscopic space of the crystal and cannot be smaller.

The set of atoms in a prime unit cell is equivalent to the smallest set of atoms in the microscopic space of a crystal for periodic translation, which is called a structural primitive. Complex unit cells are polyploids of prime unit cells, and there are three types: split heart unit cells (2ploid), symbol i-plane center unit cell (4ploid), symbol F bottom heart unit cell (2ploid).

There are three ways of spatial distribution of metal elements, face-centered cube, body-centered cube, and face-centered hexagonal.