Excavator mining

1.

1、 mining principle

at the beginning, we could dig bitcoin with the computer CPU. The founder of bitcoin, Nakamoto Tsung, g out the world's first creation block with his computer CPU. However, the era of CPU mining has long passed, and now bitcoin mining is the era of ASIC mining and large-scale cluster mining

looking back on the mining history, bitcoin mining has gone through the following five times: CPU mining → GPU mining → FPGA mining → ASIC mining → large-scale cluster mining, The mining speed changes are as follows:

CPU (20mhash / s) → GPU (400mhash / s) → FPGA (25ghash / s) → ASIC (3.5tash / s) → large scale cluster mining (3.5tash / s * x)

mining speed, which is called computing power in professional terms, that is, the ability of computer to generate hash collisions per second. In other words, how many hash collisions can our miner do per second is the calculation force. Computing power is the ability to dig bitcoin. The higher the computing power, the more bitcoin you dig, the higher the return

in the world of bitcoin, a data block is recorded about every 10 minutes. All mining computers are trying to package the data block and submit it, and the person who successfully generates the data block will get a bitcoin reward. Initially, bitcoin rewards of 50 bitcoins could be generated about every 10 minutes. But the payment is halved every four years, and now the bitcoin network can generate 25 bitcoins every 10 minutes

to successfully generate data blocks, miners need to find the effective hash value. To get the correct hash value, there is no shortcut. You can only guess. The process of guessing is the process of computer random hash collision. If you guess correctly, you will get bitcoin

Mining method: from a miner to a large-scale mine, you need to prepare a miner, a computer that can connect to the Internet, an AUC, a raspberry pie, power supply and all kinds of connecting lines, etc. The connection order of various devices is network cable - & gt; Raspberry pie - & gt; Microusb cable - & gt; AUC-> 4Pin cable - & gt; Mining machine and power supply

< EM > Figure 3: Mine Map (scale of tens of thousands of mining machines) < / EM >

nowadays, the profit space of small and medium-sized absenteeism who take one mining machine home or deploy a small family workshop (dozens of mining machines) is very limited, and the mining instry is graally concentrating on enterprises and teams with low-cost power resources and professional deployment ability

there are many factors that affect the mining revenue, such as the performance and power consumption of mining machinery, the computing power and difficulty of the whole network, the deployment and operation and maintenance capacity of the mine, the availability of low-cost electricity resources, and the currency price and policy guidance, etc. At present, excellent mining enterprises have the ability of chip research and development, a lot of computing power, professional mine deployment and operation experience, etc. in the future, resources and computing power will be more and more concentrated in these mining enterprises

2. Mine pool

in addition to the above equipment, you also need a necessary tool - mine pool. The function of the mine pool is to gather a large amount of mineral computing power, increase your probability of getting bitcoin, and at the same time, distribute your future bitcoin income to your account in advance

the simple explanation is as follows: now the bitcoin network generates a block every 10 minutes, which contains 25 bitcoins. Suppose there are 1W people in the world participating in mining, then in these 10 minutes, only one lucky person has taken these 25 bitcoins, and the others have nothing. The principle of the mine pool is that everyone mines in teams and distributes according to the agreed distribution method, so that the income of the miners' bitcoin tends to be stable and the risks of the miners are reced. Let's take the most common PPS allocation method as an example. Suppose that your computing power is 10t, and the computing power of the whole mine pool is 100t. Your computing power accounts for 1 / 10 of the total computing power of the mine pool. Suppose that the mine pool can generate 10 bitcoins a day, then you can get 1 bitcoin a day

3. Cloud computing power

in reality, the supply of mining machines often exceeds the demand, and at the same time, the delivery of mining machines needs a long waiting period. Miner installation, commissioning, maintenance and other processes are very complex, which requires a lot of energy. Miners have to enre the noise and heat of miner. For miners, the biggest cost is not these, but the high electricity charges consumed by mining. The profit space of small and medium-sized miners is getting smaller and smaller, even negative

Mining income and risk mining income can be calculated by the following formula:

Mining income = generated bitcoin * currency price - mining machinery cost - electricity fee - custody fee

if you are just a small miner, generally you only need to dect mining machinery cost and electricity fee

Mining risks are as follows:

< UL >

at present, the number of bitcoin is less than 4.5 million. If we do not issue additional bitcoin, the price of bitcoin will fluctuate, and the price callback will lead to the extension of the payback cycle

mining difficulty improvement at present, our machines can meet the market demand

the risk of power outage

< UL >

< EM >
< / EM >

2. 10000g of computing power takes 2 days and 1 bitcoin, but high-end graphics cards are not easy to sell. Even if you have that spirit, the graphics card will hang up. Don't be fooled by the fact that one bitcoin is equal to 3800 yuan. The strategy of N and a is equal. A computer with interrupted configuration only g one bitcoin in 2000. Mining needs high-end graphics card, weigh it yourself, just to solve the problem of high-end graphics card is not easy to sell. There's only a little problem with heat dissipation when mining. There's no need to explain. A year's electricity bill plus your configuration is actually a big scam

3. This strategy is too simple: build a fortress, do the pit task at level 92, unlock the pit at level 1, and then unlock the pit at level 2-3 with the improvement of the level. You can dig your own pit every day. There is a kind of mine car in the mine, which can proce two kinds of props, one is to speed up the walking speed in the mine, the other is to halve the mining time in the mine. So no one's mining in the Delano field. But it is not recommended to study mining major, because I have a number. I used to study mining 600 full. It takes 3.2 seconds to dig in my own mine, and only 1.7 seconds to eat props; Later, I washed out mining, learned from tailoring, and then went to mine. That's 1.5 seconds. Professional mining is not as good as non professional mining.

4. 1. The poor terrain environment of the mine
the site must be observed before the operation. The mine is located in the high altitude area, with many ramps and sharp bends, so the requirements for the operator are relatively high. In addition, the roads of small private mines are relatively narrow, and there are no stone lined roads. They are all dirt roads, so they can't walk in the rainy season. The picture above is the scene of the open-pit mine project. Special attention should be paid to safety when driving excavators here
2. There are many hidden dangers of excavators responsible for stripping operation
for excavators responsible for stripping operation in mines, they often work on the top of the mountain, which has a high risk index. The mining team and the slag transportation team should try not to be in the same line, otherwise it will be troublesome to roll down the stone. In addition, the excavator responsible for stripping ring mining should not be too many, otherwise the hidden danger is too big
3. Rock excavation in the mine does great harm to the bucket
excavator working in the mine is different from other places, such as digging hard rock in the mine, which does great harm to the bucket. The operators should operate the bucket correctly, adjust the position of the excavator according to the direction of the rock crack, so that the bucket can shovel in smoothly. The force should not be too strong when digging, and the tooth root is easy to break
4. Always obey the command of the safety officer
the safety officer in the mine is also essential. Mining and stripping need at least two safety officers to cooperate, and need to be equipped with whistles and walkie talkies, because the excavator driver can't observe the situation of the rear slope and the surrounding at any time, and the safety officer needs to observe at the highest point. If no one commands, it is dangerous for the rock to fall, This is also one of the hidden dangers of mine safety
5. At the same time of mining, slope repair should be carried out along the way.
open pit mining has the characteristics of heavy workload and many potential safety hazards. Excavator in mining at the same time, but also by the way to repair the slope, because some slope you first repair is not good, to the back to repair it is very difficult. The purpose of repairing the slope is to rece the occurrence of rolling stones and landslides, which requires higher requirements for the manipulator
6. Don't listen to the sound when loading the truck.
when the excavator is working on the slope, you need to pay more attention all the time. Don't turn on the sound in the car or listen to the music. Under the vibration of the excavator in large mines, the loose mud and stones above may be shaken down. If you play it too loud, you can't hear the commander's command or other problems
7. Pay attention to the falling stones after blasting operation
blasting operation is often carried out in mines. Special attention should be paid to safety after blasting, and all-round inspection should be carried out in advance to see if there are loose stones that are about to fall or empty joints caused by blasting. The operator should pay attention to safety, and excavate and mp before entering the working area.

5.

Terex rh400 excavator is the largest excavator in the world. There are six excavators in the world. The first one was manufactured in 1997, and the improved sixth one was launched in 2002. Among them, the fifth one is electric driven. The diesel engine version uses two Cummins qsk60-c diesel engines (16 cylinders, turbocharged) with a tank capacity of 16000 L. five of the six excavators are in the United States One is used in a Canadian mine, with a total weight of 1008 tons, a maximum power of 4398 horsepower and a bucket capacity of 43.58 cubic meters

extended data:

excavator, also known as excavation machinery, also known as excavator, is a kind of earth moving machinery that uses bucket to excavate materials higher or lower than the bearing surface, and load them into transport vehicles or unload them to the stockyard

the materials excavated by excavators are mainly soil, coal, silt and soil and rock after pre loosening. From the development of construction machinery in recent years, the development of excavator is relatively fast, excavator has become one of the most important construction machinery in engineering construction. The three most important parameters of excavator are operating weight (mass), engine power and bucket capacity

source of reference:

Network excavator

6. 1. The poor terrain environment of the mine < br > before operation, the site must be observed. The mine is located in a high altitude area, with many ramps and sharp bends, so the requirements for the operator are relatively high. In addition, the roads of small private mines are relatively narrow, and there are no stone lined roads. They are all dirt roads, so they can't walk in the rainy season. The picture above is the scene of the open-pit mine project. Special attention should be paid to safety when driving excavators here< Br > 2. There are many hidden dangers of excavators responsible for stripping operation < br > for excavators responsible for stripping operation in mines, they often work on the top of the mountain, which has a high risk index. The mining team and the slag transportation team should try not to be in the same line, otherwise it will be troublesome to roll down the stone. In addition, the excavator responsible for stripping ring mining should not be too many, otherwise the hidden danger is too big< Br > 3. Rock excavation in mines does great harm to the bucket < br > excavators working in mines are different from other places, such as digging hard rock in mines, which does great harm to the bucket. The operators should operate the bucket correctly, adjust the position of the excavator according to the direction of the rock crack, so that the bucket can shovel in smoothly. The force should not be too strong when digging, and the tooth root is easy to break< < br > 4. Always follow the direction of the safety officer < br > the safety officer in the mine is also essential. Mining and stripping need at least two safety officers to cooperate, and need to be equipped with whistles and walkie talkies, because the excavator driver can't observe the situation of the rear slope and the surrounding at any time, and the safety officer needs to observe at the highest point. If no one commands, it is dangerous for the rock to fall, This is also one of the hidden dangers of mine safety< The open pit mine has the characteristics of heavy workload and many potential safety hazards. Excavator in mining at the same time, but also by the way to repair the slope, because some slope you first repair is not good, to the back to repair it is very difficult. The purpose of repairing the slope is to rece the occurrence of rolling stones and landslides, which requires higher requirements for the manipulator< Br > 6. Don't listen to the sound when loading the truck. < br > when the excavator is working on the slope, you need to pay more attention all the time. Don't turn on the sound in the car or listen to the music. Under the vibration of the excavator in large mines, the loose mud and stones above may be shaken down. If you play it too loud, you can't hear the commander's command or other problems< Br > 7. Pay attention to the falling stones after blasting operation < br > blasting operation is often carried out in mines. Special attention should be paid to safety after blasting, and all-round inspection should be carried out in advance to see if there are loose stones that are about to fall, or virtual joints caused by blasting. The operator should pay attention to safety, and the excavator and self unloading can enter the working area after ensuring safety.

7. Kevin Kelly's experience:
Kevin Kelly was born in Pennsylvania in 1952. He dropped out of Rhode Island University in 1971 after one year and became a freelance photographer
between the ages of 20 and 27, Kevin Kelly traveled to Asia and traveled in Japan, South Korea, Taiwan, Philippines, Thailand, Myanmar, India, Sri Lanka, Pakistan, Bangladesh, Nepal, Afghanistan, Iran and other places. At the age of 27, in Jerusalem, Kevin Kelly experienced a magical experience. He felt that his life span was only six months, so he tifully gave to his parents, gave alms, visited relatives and friends, and then "died" on Halloween night
after returning to the United States, this person who has experienced a spiritual "death" has traveled 5000 miles by bike across the United States to experience the glory of life
in the next 30 years, he warmly embraced this rapidly developing, dazzling and increasingly technological world in his own way. With his unique vision and wisdom, he explored the voice of life hidden behind the powerful technological power at the end of the brilliant thought and in the inaccessible frontier
in 1981, Kevin Kelly founded his own magazine walking journal. He has been an editor and important contributor of global review, signals and global overview. His articles have been widely praised by the economist, the New York Times, time, science and other heavyweight media. Well (whole earth electronic link), which he co founded, is still one of the most popular and intelligent communities
in 1999, when the famous director wodrowski was shooting the blockbuster matrix, Kevin Kelly's book out of control was designated as one of the three books that all cast members must read.

8.

"Inevitable" original PDF webpage link

9.

Ali's utilization is a three-dimensional and comprehensive process. It can take the initiative and wait for the hare

first, take the initiative to find. If you are an honest user, you can see the purchasing information. You'd better contact the buyer as soon as possible. However, the success rate is not very high. Because everyone can see the purchasing information, there are a lot of people who invite buyers. So the competition is fierce. But don't give up

at the same time, you can find some of your target customers, send some instry information (if you do machining, send some mechanical information), or directly send your ads, or directly communicate with the target customers, and ask them whether they need your procts. When communicating, be polite and professional, and show where your procts and services are beneficial to customers. Who are your target customers and which enterprises? You should know best

Second, wait for customers to come. If you are chengchengtong, I hope the following suggestions can help you:

1. Publish attractive supply information. This is the most basic and core issue of using Alibaba chengxintong. Because most customers use the Alibaba search box to find supply information. Therefore, how to make your information in the forefront, how to make your information attractive, is the integrity of the members must consider

one of the top information rankings is that it can be used as an online marketing treasure, that is, it can pay to the top, and the other is that it can often resend supply information. How attractive is information? This involves the optimization of information. For example, keyword selection, choosing the right information category, carefully filling in proct attributes, and writing detailed information content. Reflect what benefits your company, procts and services can bring to customers

At the same time, you can try to use blogs, forums, business circles and Alibaba Wangwang. These tools are free. You can try to write some soft articles, such as your entrepreneurial experience, the story of your interaction with customers, your understanding of Ali, etc. After these soft articles are sent to the blog, they can be combined with Wangpu and directly displayed in Wangpu. When blog posts, please select & quot; Company news;, In this way, it can be displayed directly in Wangpu

3. If your proct is consumer goods, you can also try to open a shop on Taobao, or even develop a distribution shop owner. In this way, you can not only promote your brand, but also get orders

4. Learn more. Everyone is from the novice, so, must be good at learning, from the forum, blog learning. I believe that through your efforts, you will make good use of Alibaba platform

10.

1. The premise of entering Alibaba is to open a paid honest member. Chengxintong members can automatically open Wangpu after chengxintong is opened. The annual fee is 6688 yuan. Alibaba's store itself is free

(1) you need to open a paid chengxintong member to open a shop on Alibaba. Chengxintong members can automatically open Wangpu after chengxintong is opened

(2) if it is necessary to apply for chengchengtong, it needs a business license to open chengchengtong

(3) [new members join chengxintong] the annual fee for new members to join chengxintong is 6688 yuan

(4) [renewal chengxintong] at present, the renewal chengxintong of old members is also 6688 yuan

(5) for detailed sales rules, it is recommended to consult chengxintong marketing consultant or call 400-826-5188

(6) from January 25, 2019, the free enterprise members (excluding the members of break contract integrity service) who have completed the enterprise name certification on the platform will stop opening the seller's related procts and services

(7) if the account has opened a shop on Taobao, it can't open another shop on 1688

< H2 > extended data

1. Purchase Wangpu without chengxintong: Wangpu is not sold separately. If you want to use Wangpu function, you should choose to open chengxintong. After chengxintong service is opened, you can open Wangpu for free

2. Can Wangpu be stopped: members of chengxintong do not stop, delete, cancel or close Wangpu, but will always exist; When chengxintong is not renewed 30 days after its expiration, Wangpu will be closed

3. From January 25, 2019, the free enterprise members who have completed the enterprise name certification on the platform (excluding the members who have broken the contract and provided good faith service) will stop opening the seller's related procts and services (including procts and services that can be used based on the seller's identity, such as Wangpu, quotation, release / modification of commodity information, subject to the website restrictions)< br />