Source code of computing power leasing
you can check these open source codes in the open source community. Most of the normal source code of virtual currency is open source, and it is also open. The risk of virtual currency running away without open source code is great
lightcoin is an unsuccessful test proct of bitcoin. It is said that it is not suitable for ASIC mining. Li & Fung's ASIC miner came out and once accounted for more than 50% of the total network computing power, completely breaking the myth of lightcoin. Apart from more than bitcoin, there is not much innovation. Of course, Leyte coin is the ancestor of Shanzhai coin, and it is still the second largest cryptocurrency in the world
other well-known counterfeit coins include dog coin, Fuyuan coin, Ruibo coin, Yuanbao coin, etc.
1 Division of mining units of ore deposits generally, ore deposits occupy a large area and have abundant reserves. In order to develop in a planned way, the ore deposits are often divided into several parts (mining units) from large to small according to the occurrence conditions of ore bodies, and are classified into corresponding mining enterprises (proction units) for mining
generally, the distribution range of ore deposits is called mining area, which is usually classified as a Mining Bureau (or company). All deposits in the same geological structure and of the same origin are called ore fields (coal mines are called coalfields). If the mine field is large in scale, it can be divided into several parts, each part is mined by a mine (pit mouth), which is called mine field (Figure 12-1). The boundary of mine field can be artificial boundary or natural boundary. During mining, the mine field must be divided into smaller parts. For inclined seam, the seam is usually divided into several long sections parallel to the strike according to a certain elevation along its inclined direction, which is called stage (or middle section), and the upper and lower interface is called horizontal, such as 0m level and - 50m level (Fig. 12-2). When the stage is small, the mining can be carried out at one time along the whole stage; If the stage area is large, it should be further divided into n mining areas, each mining area along the inclined layout of n mining faces, called section
Fig. 12-8 schematic diagram of roof failure zoning
(according to Beijing Academy of Coal Sciences, 1985)
a-irregular caving; B - rule falling; C-serious fracture; D-general cracking; E - tiny crack; F - caving zone; G-fracture zone; H-overall moving zone; I-fracture zone
1) caving zone: the area where the direct roof splits into pieces and collapses downward. It can be divided into irregular caving section and regular caving section. The rocks in this area are broken and expanded, accumulated and permeable, which can form a channel for the upper groundwater or surface water to pour downward, causing water inrush. Generally, this area is not allowed to develop into the upper strong aquifer or surface water
2) fracture zone: a large number of mining fractures with cut and separated layers appear above the caving zone. The zone can be divided into three sections: serious fracture section, general fracture section and micro fracture section. When the zone reaches the supply water source, the mine water inflow will increase sharply, even cause water inrush
3) overall movement zone of rock stratum: the zone is located above the fracture zone, which is generally characterized by the overall bending deformation or shear displacement of the stratum, or the overall bending and falling in the zone. Generally, there is no fracture and it does not form a water filling channel
everyone can compile and execute their own compiled programs, which also means that everyone can modify the code and run it. Under the current mechanism, no matter how to modify the code, as long as the number of people who modify the code does not exceed 51%, the modification is meaningless and a waste of their own computing power< br />
therefore, at least the participants need to know the code. If the code of a blockchain project is not open source, then the nodes running its program are opaque, which is equivalent to that you have installed his agent on your own node to execute commands on behalf of everyone. Equivalent to the system developers control the entire network. How can this kind of blockchain work< br />
from a conceptual point of view, if a blockchain project is compared to a machine, its working mechanism is transparent and can be trusted. First, open source is a necessary option for blockchain projects, not an optional option. Both public chain and alliance projects need open source; Second, open source and source code delivery are two different concepts. Source code delivery is not an open and transparent process in which everyone participates< br />
for example, in Ethereum, there was a loophole in a platform coin running on its platform and it needed to be modified. This modification was directly reflected in the code. In the process of reading the code, it was found that there were many codes related to the coin, which were used to deal with this problem. Once this problem was encountered, how should the node deal with it, These processing methods are written in open source code and can be read by everyone. If the person in charge of the node approves this solution, he will run this program, which is equivalent to the decision to support this kind of code. In fact, the blockchain is implemented through this mechanism.