How long is the life of a miner

Bitcoin is a kind of network virtual currency. Bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system. Assuming that the mining computing power is 100 mhash / s and the total computing power is 4000 ghash / s per day, 3600 bitcoins can be g out every 24 hours

China's computing power has accounted for more than 75% of the world, that is to say, 75% of bitcoin in the world is made in China. How long does it take to dig a bitcoin

bitcoin used to be very good at "digging", which can be done by ordinary computer CPU, and it can automatically "solve problems" by downloading software. But with the rise of currency price, more and more people want to "solve the problem", and the difficulty of mining is also increasing. Now, the amount of computation needed to dig a bitcoin is beyond the reach of ordinary people. Ordinary computers can't afford it

instry insiders said that in 2014, 100 bitcoins were generated from 500000 yuan of electricity charge per day, and the cost of electricity charge alone was 5000 yuan per coin. But now, the same cost has more than doubled, and the electricity cost of each bitcoin is as high as 10000 yuan

in the generation mechanism of bitcoin, mining reward is decreasing. At the beginning of the birth of bitcoin, the miners could get 50 bitcoins for each page of the ledger, and then 25 bitcoins for each page of the ledger, decreasing in turn. It's like digging gold. At first, it's more and less. The time point at which each new reward is reced by half is called half bitcoin proction

assuming that the mining computing power is 100 mhash / s, the total computing power is 4000 ghash / s per day in 2014, and 3600 bitcoins are g out every 24 hours

now, we can understand the difficulty of bitcoin digging in this way, which is equivalent to 100 million dice throwing numbers less than 100 million and 50 million. Whoever throws them first will get the bookkeeping right. At this point, 1050 million is a hash value. The process of throwing dice is called hash collision. The unit of mining power is the number of hash collisions per second

at present, the computing power of bitcoin in the whole network has reached 2.36 billion hash collisions per second, which is equivalent to the number of water droplets in more than 200000 50 meter long standard swimming pools. But even with such a large amount of computing power, it will take about 10 minutes to hit a hash value that meets the requirements

in 2012, bitcoin's output was halved for the first time, and in July 2016, bitcoin's output was halved for the second time. At present, 12.5 bitcoins are awarded for recording one page of account book. The next halving will take place around 2020, and the total number of bitcoins will not increase by 2040, with a total of 21 million

Related videos: how long does it take to dig a bitcoin

How long can video card mining last? How many hours is the working life of graphics card mining? For this problem, first of all, the score is clear in two cases, one is the use of new graphics card, the other is the use of old graphics card, the working life is naturally different. If you buy Mining host configuration used graphics card, working life is not easy to say

the above is a brief introction of "graphics card mining life"! Hope to help you

The life of the graphics card is the same as that of the general electronic components, which is 6 to 10 years< br />

Preface
Chapter one overview of depression
section one origin and development of depression
I. description of depression in the West
II. Description of depression in China
section two harm of depression
I. Influence on daily life
II. Suicidal behavior
section three understanding of depression
I. correct understanding of depression
II The differences between depression and other diseases
3. Adolescent depression
Chapter 2: biological causes of depression
section 1: genetic factors
1. Blood relationship
2. Twins
3. Foster children
section 2: neurotransmitters
1. Serotonin
2. Norepinephrine
3. Dopamine
4 Neuropeptides
the third segment of neuroendocrine system
I. endocrine hormones
II. Hypothalamus pituitary adrenal axis
III. hypothalamus pituitary thyroid axis
IV. immunological studies
I. immune cells
II. Cytokines
v. neural structure and function
I. electroencephalogram
II. Brain structure
III Brain function
section 6 biological rhythm
I, biological clock
II, sleep disorders
III, seasonal
Chapter 3 psychological causes of depression
section 1 psychoanalysis
I, "object splitting" theory
II, "mother infant attachment" theory
III, "self punishment" theory
IV, "psychological defense" theory
section 2 psychological behavior theory
I Learned helplessness
2. Reinforcement model
3. Regression model
4. Punishment model
section 3. Cognitive model
1. Quality stress model
2. Cognitive distortion model
3. ABC theory
4. Attribution style theory
5. Self attention theory
section 4. Other psychological theories
1. Susceptible personality of depression
2 Self esteem model
3. Hopeless depression model
Chapter 4: Sociological etiology of depression
section 1: family factors
1. Family structure
2. Parenting style
3. Family economic status
4. Family life events
section 2: marriage factors
1. Divorce
2. Sex life
3. Fertility
section 3: interpersonal relationship
1 Interpersonal personality characteristics
2. Interpersonal trust
3. Interpersonal conflict
4. Other social factors
1. Social support
2. Social change
3. Social occupation
4. Gender factors
5. Symptoms and diagnosis of depression
1. Clinical manifestations of depression
1. Painful emotional experience
2 Impairment of normal ability
3. Somatic symptoms
4. Cognitive impairment
5. Rare non characteristic symptoms
6. Changes of expression, daily behavior and speech
7. Changes of social behavior.
section 2 types of depression
1. Standard classification
2. Special types
section 3 diagnosis of depression
1. Diagnostic steps
2 Differential diagnosis
Chapter 6 behavioral therapy of depression
section 1 relaxation techniques
I breathing relaxation techniques
II muscle relaxation techniques
III other relaxation techniques
section 2 confidence training
I implementation steps of confidence training
II common techniques of confidence training
III Notes for implementation
section 3 behavior shaping technology
I. implementation steps of behavior shaping
II. Implementation technology of behavior shaping
III. notes for behavior shaping
section 4 behavior contract technology
I. implementation steps of behavior contract technology
II. Implementation technology of behavior contract
III Considerations for implementation
section 5 thought blocking technology
I. implementation steps of thought blocking
II. Implementation considerations
Chapter 7 cognitive therapy for depression
section 1 Ellis rational emotive therapy
I. implementation steps of rational emotive therapy
II. Implementation technology of rational emotive therapy
III Implementation considerations
section 2 Beck Cognitive Therapy
I. basic steps of Beck Cognitive Therapy
II. Implementation techniques of Beck Cognitive Therapy
III. implementation considerations
section 3 attribution therapy
I. implementation steps of attribution therapy
II. Implementation techniques of attribution therapy
III. implementation considerations
section 4 new emotive therapy
I Implementation steps of new emotive therapy
2. Implementation techniques of new emotive therapy
3. Implementation precautions
Chapter 8 interpersonal therapy for depression
section 1 treatment mode of interpersonal therapy
1. Setting of interpersonal therapy
2. Skills of interpersonal therapy
3 Problems to pay attention to
section 2 the process of interpersonal therapy
I. early stage of treatment
II. Mid stage of treatment
III. final stage
section 3 interpersonal therapy of adolescent, postpartum and senile depression
I. interpersonal therapy of adolescent depression
II. Interpersonal therapy of postpartum depression
III Interpersonal relationship therapy for senile depression
section 4 the integration of interpersonal relationship therapy and other psychotherapy
I. group interpersonal relationship therapy
II. Interpersonal cognitive problem solving therapy
Chapter 9 Art Therapy for depression
section 1. The implementation conditions of Sandplay Therapy
II. The implementation process and specific skills of Sandplay Therapy
III Notes on the implementation of Sandplay Therapy
section 2 music therapy
I. implementation conditions of music therapy
II. Implementation process of music therapy
III. notes on the implementation of music therapy
section 3 psychodrama therapy
I. Basic Elements of psychodrama therapy implementation
II. Implementation process and specific skills of psychodrama therapy
III What should be paid attention to in the implementation of psychodrama therapy Dance therapy
Chapter 10 drug treatment of depression
section 1 traditional antidepressants
amitriptyline
imipramine
doxepin
clomipramine hydrochloride
demetirine hydrochloride
maprotiline
minaprin
moclobemide
section 2 new antidepressants
fluoxetine
paroxetine
citalopram
sertraline
fluvoxamine
venlafaxine
misoprostone
bupropion
section 3 other antidepressants
mirtazapine
reboxetine
trazodone
section 4 common Chinese medicine prescriptions
Ganmai Dazao Decoction
Xiaoyao Powder
Banxia Houpu Decoction
Guipi Decoction
Zishui Qinggan Decoction
Anshen Ding pill
depression noun index
...

A: first, block height does not refer to the capacity of the blockchain

block height is the number of blocks linked to the main chain, that is, the number of blocks connected to the blockchain

2. The block has two identifiers, one is the hash value of the block head, the other is the block height

3. The hash value of the block head is the number obtained by the second hash calculation of the block head by sha256 algorithm

block hash value can uniquely and explicitly identify a block, and any node can independently obtain the block hash value by simply hashing the block head

4. Block height refers to the position of the block in the blockchain

block height is not a unique identifier