Ethereum outfield

1. Hello
if bitcoin stops trading worldwide, it will completely become a bubble economy. No matter how much you buy, how much you have in hand, you can only break your teeth into your stomach. The only thing that can give you a sense of security is cash in hand.
of course, it can't be cashed at home. You can only go to foreign trading institutions, such as btccas. Generally speaking, it can be cashed directly on the outfield. If you don't want to cash it as soon as possible, you will feel at ease
thank you

2. The price of bitcoin has gone up abruptly, and the old miners who left the mine have begun to return. Many new people have also poured into the mining instry. However, the price has gone up, and the difficulty of mining bitcoin is also rising. How can we make money from mining now
- - talking about the mining cost of bitcoin -
the first thing to consider is the cost if you want to make money. If the profit is greater than the cost, it is worth doing. We all know how much bitcoin costs, so let's calculate the cost
1. Mining machine cost: the "number" of bitcoin is a problem-solving process, which can't be calculated by human brain alone. Therefore, mining people need to buy mining machines and keep calculating. The more mining machines, the stronger the computing power
2. Electricity charges: mining machines are big consumers of high power. How much electricity does it consume? Let's put it this way. At present, the electricity consumption of bitcoin and Ethereum mining has surpassed Jordan, Iceland, Libya and other small countries, ranking 71st among all countries and regions in the world. You want to cry when electricity is expensive
3. The rent of the place where the mining machine is placed: because the mining machine consumes a lot of electricity, the power supply load of ordinary residential buildings can not be guaranteed at all, so the mining must rent a commercial site separately, and the rent is much more expensive than that of ordinary residential buildings
4. Operation cost: in order to ensure the computing power, the high-power mining machine needs to work 24 hours, which requires someone to maintain it at any time. When the mining machine is in trouble, the cost of hiring someone is required; At the same time, the mining machine is very delicate. If it is too hot or too cold, the vegetables will be stopped. Therefore, the measures of cold air and cold water insulation are needed to help the mining machine run. This is another expense
5. Mining machine update cost: because bitcoin is becoming more and more difficult to dig, the machine that was able to dig a month ago may not be able to dig anything today, and the market will also launch mining machines with greater computing power. The original mining machine is not worth money immediately. If you want to maintain computing power, you need to buy mining machines again
the above bitcoin mining costs all have a marginal effect, that is, the larger the volume is, the lower the corresponding cost will be. Therefore, some super large mines have been built
bitcoin g in the mine will enter the mine pool and be distributed by all participants. Large mines will be built in places where labor and electricity are cheap, such as Venezuela, the legendary miner's paradise, or Iceland, where the climate is favorable and electricity is cheap
as for the cost, everyone will be different. Let's take a look at an average: in 2017, according to the data of elite fixtures, a research institution, Venezuela is the cheapest of 115 mining countries, which is 513 US dollars, while South Korea is the most expensive, which is 26170 us dollars
China's mining cost is US $3172, which is relatively low among 115 countries. However, the cost is an average value. Large mines with low electricity prices must be much lower. If you are a lone ranger, the cost will rise sharply
in a word, if you really want to make money by mining, first of all, unless you are rich enough to build a mine with thousands of machines, you'd better join a mine to dig together. Although you have to share the money, it's still appropriate in the long run because it can greatly rece costs and improve computing power
secondly, whether you dig by yourself or join the mine, you must choose the place with low electricity cost, and the city with abundant hydropower resources is preferred, because hydropower is the cheapest source of power generation in China at present.

3. This is divided into domestic and foreign brands,
foreign brands include hesman, Roderick, Siemens, etc.
domestic brands include Yanhua, Yanxiang, moxa, Sanwang, Dongtu, corolis, zhuoyuantong, Maiwei, Zhengwei, etc.
in fact, instrial Ethernet switches are also divided into many markets, types and fields, such as two-layer Instrial Ethernet switches and three-layer Instrial Ethernet switches, Instrial, commercial, etc. In fact, Huawei and ZTE have relatively high market positioning and advanced technology. They are mostly used in the high-end market and export a lot, so they are not easy to rank. For example, the general ones, such as the nine ones listed above, are still well-known in the general instrial field.

4.

Siemens SCALANCE X series is an instrial Ethernet switch suitable for instrial environment, which has a wide range of types and is the core of Switched Instrial Ethernet network. It supports both SNMP and web diagnostics and PROFINET diagnostics. It provides high reliability, high availability and easy maintenance of instrial design. The chief engineer of Beijing tiantuo Sifang Technology Co., Ltd. said that the advantages of SCALANCE x Instrial Ethernet switch are not limited to this. Here is a detailed introction

scale X-100 non network management switch has electrical port and optical fiber port, and rendant feeding device and signal contact can be used for equipment layer application

The

scale X-200 network management switch is used for the application from equipment layer to whole plant networking. As the configuration and remote diagnosis functions are integrated into the step 7 engineering software, the usability level of the factory has been improved. Equipment with high degree of protection does not need to be installed in the control cabinet. For the factory network with hard real-time requirements and maximum efficiency requirements, the corresponding isochronous synchronous switch (SCALANCE x-200irt) can be used

the main application area of scale x-300 enhanced network management is the connection part of high-performance factory network and enterprise network

scalancex-300 enhanced network management proct series combines the firmware function of scalancex-400 series (excluding layer 3 routing function) and the compact structure of SCALANCE X-200 proct series. Therefore, compared with scalance-200 switch, SCALANCE x-300 switch not only has better management function, but also has better firmware function. Molar scale X-400 switches are used in high-performance factory networks, such as those with high-speed rendancy. Based on the molar structure, the switch can be adjusted precisely for the corresponding tasks. Due to the support of it standards (such as VLAN, IGMP, RSTP), the automation network can be seamlessly integrated into the existing office network. The routing function of layer 3 allows communication between different IP subnets