The numeral representation of money

1. According to the roadmap published on the official website, there are two major branches, one is the expansion of underlying functions, the other is the optimization of user experience. The underlying function expansion is mainly to develop new functions on the basis of peer-to-peer payment to support the long-term vision of a real Internet of value (IOV). For example, expand Op_ Return, optimizing the cache architecture for balance, anonymity on the chain, and native protocol component based on op code are designed to support the implementation of functionality
there are two main reasons why user experience optimization is listed separately. First, LBTC wants to build an excellent peer-to-peer e-cash system. Its basic idea is to put payment experience and user first, so it puts it at a high level, such as cross platform light wallet, accelerating payment confirmation speed, optimizing irreversible block mechanism, etc. Second, LBTC has always emphasized superior chain governance system. Before that, there was a standardized SGS (spark governance system) governance system, but it still needs to constantly improve the relevant mechanisms. For example, we should greatly optimize the node parameters and election mechanism, establish the LBTC foundation, multi-channel proposal process, and light wallet's support for the governance function on the chain.

2.

f=N μ N is the positive pressure, that is, the pressure acting on the contact surface, μ It is the dynamic friction coefficient, which refers to the influence factors of the roughness of the contact surface on the friction. Or use the balance f = f; It's only used when it's stationary or moving in a straight line at a constant speed, but it's the most used in junior high school

the so-called friction is the force that hinders the relative motion of the object, and the direction of friction is opposite to the motion direction or relative motion direction of the object. The conditions of friction are as follows:

(1) two objects must contact each other

(2) there was extrusion between two objects

(3) there is a tendency of motion or relative motion between two objects

If an object is stationary on a horizontal plane, it will not be affected by friction if it is not pushed or pulled. If thrust or pull is received, it belongs to the category of static friction. The size of friction is equal to that of pull or thrust, and has nothing to do with the gravity or pressure of the object. Only the maximum static friction is related to the pressure or gravity on the object

if the object is not pushed by 10N force, the object will be subjected to static friction, which is equal to the thrust. Just push with 15N force, and the friction force on the object is the maximum static friction force. If the thrust force is increased later, the friction force will not change. Theoretically, the sliding friction of objects is less than the maximum static friction, but it is generally considered that they are equal

The friction force is f = 15-10 = 5N

extended data:

methods to increase beneficial friction

(1) increase the roughness of contact surface

(2) increase the pressure

(3) change rolling friction into sliding friction

(1) replace sliding friction with rolling friction

(2) make the contact surface separate [form a layer of air cushion or magnetic suspension on the contact surface of the object]

(3) decrease the pressure

(4) rece the roughness of the contact surface

In engineering technology, people often rece friction by applying lubricating oil. The science of this problem is called tribology, which is a branch of mechanical manufacturing

If two objects, which are in contact with each other and squeeze each other, but relatively still, only have a relative sliding trend under the action of external force, but do not have relative sliding, then the force between their contact surfaces hindering relative sliding is called "static friction". When the static friction increases to the maximum, the object will move

size: the static friction varies according to the external force, but there is a maximum value, which is called the maximum static friction. The maximum static friction is slightly greater than the sliding friction

direction: tangent to the contact surface, opposite to the direction of relative motion trend

On the basis of a large number of experiments, G. amunton and C. - A. de Coulomb proposed the following law of friction in 1699 and 1781:

① the friction between two objects in contact does not exceed a certain maximum value, which has nothing to do with the size of the contact area

(2) the maximum value of friction is proportional to the normal pressure n between two objects

(3) the direction of friction is opposite to the sliding direction of the object, and its magnitude is directly proportional to the normal pressure n between the two objects

the above conclusion is only a rough empirical rule, but because it was found in the early days of mechanical science, it was called the law of friction, also known as Coulomb's law

3. Sumitomo 350 capacity 1.6 cubic meters. Sumitomo 460 Dou Rong 2. These two models can open mines. Sumitomo has low fuel consumption, fast combination action, 350 imported 190W, 460 imported 280W
it's not easy for Komatsu and Carter to import. As I said upstairs, we still need imported cars for mining, with guaranteed quality and rability. Carter's car is strong, but it consumes too much fuel and costs too much. Komatsu's cars are medium, but Komatsu's brand awareness is high, and imported cars are not easy to get. Sumitomo and Komatsu are comparable in performance, but Sumitomo is more fuel-efficient, and its mining efforts are not bad, but its popularity is not as high as Komatsu Carter, because it entered the Chinese market relatively late.

4.

bus line: No.3 → No.15, the whole journey is about 10.3km

1. Walk about 90m from Tonghua highway passenger station (old station) to passenger station

2. Take No.3 bus, pass 3 stations, and then reach Petrochemical station (or take No.39 bus)

3. Walk about 150m to Yamaha motorcycle monopoly station

4. Take No.15 bus, pass 11 stations, and reach gas station (G201)

5 Walk about 320 meters to the driver examination center of traffic police detachment of Tonghua Public Security Bureau

5. In European languages, though, million and bill are numerals. Each numeral is converted and separated by commas. Even if the numbers are not aligned, the approximate position of numerals can be quickly reflected< After all, modern bookkeeping and accounting systems were first developed in Europe. Their language habits lead to the bookkeeping method, which has become a common habit in the world.

6. digital currency is abbreviated as digiccy, which is the abbreviation of "digital currency" in English. It is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy. Digital currency is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of a specific virtual community. The European Banking authority defines virtual currency as a digital representation of value, which is not issued by the central bank or authorities, nor linked with legal currency. However, because it is accepted by the public, it can be used as a means of payment, or it can be transferred, stored or traded in electronic form.