The relationship between blockchain and operators
the term "Internet of things" is mentioned almost every day in today's life. Some data show that in 2017, there were about 8.4 billion intelligent devices connected to the Internet, such as thermostats, cameras, street lamps and other electronic procts. According to foreign McKinsey & company data, this number may reach 25 billion by 2025, and the scale of the whole economy will reach 6 trillion US dollars
are you dazzled by such a huge number? Although the Internet of things technology has been widely used all over the world, its defects are graally highlighted
according to the traditional mode, the data center (server) of the equipment manufacturer often collects the information of all connected devices, which determines that the server needs to have strong operation and storage capacity. Moreover, with the geometric growth of Internet of things equipment, the cost of server maintenance will also increase greatly, which makes it difficult for small and medium-sized enterprises to maintain
at the same time, in terms of communication compatibility, the global Internet of things platforms are lack of a unified language, which is easy to cause communication obstacles between multiple Internet of things devices. This is e to the obvious fragmentation of the Internet of things instry, whether it is smart home, smart home appliances, robots, smart cars, etc., the networks they connect are fragmented and closed. In addition, the status quo of the Internet of things instry is still full of mountains, and their influence is relatively limited, so it is difficult to reach a unified standard in a short time
based on this, the standard chain team, after accumulating the previous experience from the Internet of things, combined with the characteristics of blockchain, proposed the concept of Internet of things
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blockchain technology is not only the underlying technology of bitcoin, but also the core and infrastructure of bitcoin bitcoin has been running without any centralized organization operation and management. Later, bitcoin technology was abstracted, which was called blockchain technology or distributed ledger technology
extended data:
disadvantages of blockchain technology applied to digital currency:
first, there is no circulation management organization for "decentralization" blockchain technology is essentially a distributed database system with one-way linked list logic structure and P2P network design mode, which determines that there is no unified central control system for virtual currency based on blockchain technology
Second, it is difficult to effectively control the quantity supply the circulation of virtual currency based on blockchain technology is fixed, and according to Fisher Equation, the total transaction volume of the whole society under a certain price level in a certain period has a certain proportion with the required nominal currency volume, while the constant currency volume obviously can not meet the requirements of the growing total price of social goods Thirdly, "mining mechanism" is difficult to create recognized value bitcoin itself has no value and no national credit support. Some people think that "by continuously consuming computing power and energy to inject value into virtual currency", but it is obviously not the most efficient choice to consume millions of calculations in order to find a hash value that meets the requirements Fourthly, procers and early holders are easy to get high seigniorage any virtual currency based on blockchain technology is held by a few people at the initial stage of its development. Take bitcoin as an example. At first, bitcoin was only a proct of a few people's game. The first bitcoin purchase in May 2010 was $10000 BTC's purchase of $25 pizza. The first bitcoin transaction completed in July of the same year was $0.04/btceast of Wukesong bridge - bus stop 315 m
passing bus: No.1 64, No.76, No.337, No.370, no.420, no.436, no.624, No.1 night special 127
West entrance of Yuyuantan South road - bus stop 325 m
passing bus: no.436
West of Shagou intersection - bus stop 389 m
passing bus: No.1 76, No.337, No.370 Ye No.1, No.127 road
Shagou intersection north bus stop 407m
passing bus: No.89, no.436, no.634
Wukesong bridge north bus stop 450m
passing bus: no.436, No.568, no.952, no.967, no.982, No.983 capital airport bus Shijingshan line
625 times 625 = (600 + 20 + 5) × 600+20+5
=600 × 600+600 × 20+600 × 5+20 × 600+20 × 20+20 × 5+5 × 600+5 × 20+5 × 5
= 360000 + 12000 + 3000 + 12000 + 400 + 100 + 3000 + 100 + 25
= 390625
vertical calculation is as follows:
extended data:
decompose 625 into 600 + 20 + 5625 × 625 into (600 + 20 + 5) × 600 + 20 + 5), so using the algebraic formula (a + B + C) × A + B + C) can calculate 625 × 625
operation, mathematically, operation is a kind of behavior, through the possible combination of known quantities, new quantities can be obtained. The essence of operation is the mapping between sets
Generally speaking, operation refers to algebraic operation, which is a kind of correspondence in a set. For a pair of elements a and B in the set a taken out in order, there is a unique third element C in the set a corresponding to them, which is called a kind of operation defined in the set atwo operations can be obtained from this operation, that is, one of a and B is regarded as the desired one, while C is regarded as the known one. The operation thus obtained is called the inverse operation of the original operation
for example, addition is the operation of finding a + B = C when a and B are known, then the operation of finding B when a and C are known, or the operation of finding a when B and C are known, is the inverse operation of addition, which is called subtraction
the formula obtained by finite times of addition, subtraction, multiplication, division, power and root of numbers and letters representing numbers, or the mathematical expression containing letters, is called algebraic formula. For example: ax + 2B, - 2 / 3, B ^ 2 / 26, √ a + √ 2, etc