What the hell is Ethereum trade

1.

Ethereum is an open source public blockchain platform with smart contract function. It provides decentralized virtual machine (Ethereum virtual machine) to process point-to-point contract through its special cryptocurrency ether (also known as "Ethereum")

The token on the

blockchain is called ether, and the code is eth. It can be traded in many foreign exchange markets of cryptocurrency, and it is also the medium used to pay transaction fees and computing services on Ethereum

the concept of Ethereum was first proposed by vitalik buterin, a programmer, from 2013 to 2014, inspired by bitcoin, with the general meaning of "next generation cryptocurrency and decentralized application platform", and began to develop through ICO crowdfunding in 2014. As of February 2018, Ethernet is the second highest cryptocurrency in market value, second only to bitcoin

extended data:

Ethereum platform has no characteristics and value. Like programming languages, it's up to entrepreneurs and developers to decide what to use. However, it is clear that some application types benefit more from the functions of Ethereum than others. Ethereum is especially suitable for those applications that automatically interact directly between points or promote group coordination activities across networks

for example, coordinate the application of point-to-point market, or the automation of complex financial contracts. Bitcoin enables indivials to exchange money without the help of financial institutions, banks or governments. The impact of Ethereum may be more profound

in theory, any complex financial activities or transactions can be automatically and reliably carried out on Ethereum with coding. In addition to financial applications, any application scenario with high requirements for trust, security and persistence, such as asset registration, voting, management and Internet of things, will be affected by Ethereum platform on a large scale

2. No, simply speaking, first of all, Ethereum trade is a platform created on the basis of applications created on smart contracts and distributed Internet. Secondly, Ethereum trade has its own profit model, which is to automatically compare the prices of bitcoin, Ethereum and other digital currencies in different countries around the world through regional block links. Once the price difference is found, the transaction can be completed in milliseconds instantly, that is to say, from the low price platform to the high price platform, Make a profit on the difference between the two.

3. Like bitcoin, Ethernet currency not only circulates and trades all over the world, but also has different prices on various trading platforms
in this way, there is a price spread and arbitrage space!

4. It's easy to see the Ponzi scheme, isn't it? It's easy for the etheric side to advocate profit and pull people's heads without entity support

5. Ethtrade -- the platform generates profits by trading the price spread of ether currency and counterfeit currency, and distributes 50% of the profits to investors! Even if the platform no longer into the single tomorrow, there will be no collapse of the crisis!

6. Ethereum currency has been recognized all over the world. As for the trade you mentioned, I don't know if it is a chance to speculate or circle money. You can discuss it in private.

7. (1) Master the basic concepts related to this course: machinery, mechanism and machine; Components and parts; The composition of the machine; The main content of this course

(2) understand the properties of metal materials, the basic concepts and knowledge related to metal science, understand the application of iron carbon alloy state diagram, and master the common heat treatment methods and application scope of metal materials< (3) understand the classification and characteristics of instrial steel and engineering cast iron, and master the brand expression of instrial steel and engineering cast iron< (4) understand the classification, characteristics and application of non-ferrous and powder metallurgy metal materials

(5) master the basic concepts and axioms of statics, as well as the force analysis and force diagram drawing of objects

(6) master the synthesis and balance of plane confluence force system, plane couple system and plane arbitrary force system, establish the balance conditions and equations of plane force system, and solve plane force system. Master the synthesis and balance of plane force system, and solve the balance problem of material system

(7) master the solution of centroid coordinates and moment of inertia of plane graphics< (8) understand the concepts of tension and compression, master the section method of internal force and the normal stress on the cross section; Axial and transverse deformation, strain and Hooke's law; Mechanical properties of materials in tension and compression, strength calculation in axial tension and compression< (9) concept of shear and extrusion, shear force and shear stress, practical calculation of shear, determination of shear area; Extrusion force and stress, practical calculation of extrusion, determination of extrusion area< (10) the concept of circular shaft torsion; Calculation of external force couple moment, drawing of internal force torque and torque diagram of cross section when the circular shaft is twisted; The stress on the cross section, the deformation, the torsion angle, the torsion angle per unit length and the torsional rigidity of the circular shaft in torsion; The strength condition, the stiffness condition, the strength condition and the application of the stiffness condition of the circular shaft torsion

(11) understand the concept of plane bending and the distribution law of section stress, master the internal force calculation of straight beam bending, the drawing method of shear diagram and bending moment diagram, the stress and calculation of beam cross section ring bending, and the strength condition of beam bending< (12) understand the concept and examples of combined deformation; Master the stress distribution and strength calculation of the combined deformation of tension (compression) and bending, torsion and bending

(13) understand the kinematic pairs of planar mechanism, the classification of kinematic pairs, master the drawing of kinematic diagram of planar mechanism, the calculation of degree of freedom of planar mechanism and the treatment of several special cases

(14) understand the types and motion characteristics of planar four-bar mechanisms; Master the main working characteristics of the planar four-bar mechanism (including the existing conditions of the integral rotation pair, the angle between the quick return characteristic and the extreme position and its value range, the pressure angle and the transmission angle, and the dead center position), and master the motion characteristics of the crank rocker mechanism and the position where the minimum transmission angle appears; Master the graphic design of planar four-bar mechanism (only required: a) realize the motion design of connecting rod position; b) For the design of crank rocker mechanism with known travel speed variation coefficient, the additional condition is one of the known lengths of crank, connecting rod or frame, or the ratio of the length of two members)< (15) understand the composition, characteristics, types and applications of cam mechanism; Master the characteristics and impact phenomenon of the two basic motion laws of the follower (constant velocity motion law, constant acceleration and deceleration motion law), and be able to draw its displacement line diagram; Master the concepts of cam mechanism base circle, push motion angle, far repose angle, return motion angle, near repose angle, theoretical contour and actual contour, follower stroke and mechanism pressure angle, and be able to mark them in the drawing; Master the geometric method of cam profile design of disk cam mechanism with straight moving follower

(16) general understanding of ratchet mechanism, Geneva mechanism, incomplete gear mechanism, cam intermittent motion mechanism and other intermittent motion mechanism working principle, basic types, motion characteristics, application occasions< (17) understand the type and application of screw mechanism; The formation, classification and parameters of thread; Screw mechanism and motion analysis

(18) understand the types, characteristics and applications of belt drives; Familiar with the structure and standard of common V-belt, the tensioning method and device of V-belt drive; Master the basic theory of belt drive, such as working principle, stress, elastic sliding and slipping; Master the failure forms and design criteria of V-belt drive, the correct selection method of V-belt drive parameters, and understand the design methods and steps of V-belt drive< (19) understand the characteristics, application and types of gear transmission mechanism; Understand the basic law of tooth profile meshing, the formation and properties of involute tooth profile; Master the basic parameters and geometric dimension calculation of involute standard spur gear (it is required to remember the calculation formulas of indexing circle, base circle, addenm circle, dedenm circle, addenm height, dedenm height, full tooth height, top clearance, pitch of indexing circle, tooth thickness, slot width, pitch of base circle, transmission ratio and center distance), and understand the meshing line, meshing angle, pitch circle, standard gear The concept of standard installation and standard center distance; Master the principle of generating method for cutting teeth; In depth understanding of involute spur gear transmission meshing characteristics (constant transmission ratio transmission, center distance separability) and correct meshing conditions, continuous transmission conditions (coincidence degree); Understand the types and characteristics of gear transmission. Understand the basic parameters of helical gear and the concept of equivalent gear

understand the selection basis of gear accuracy, the characteristics of five failure forms of gear transmission, and the measures to prevent or rece damage; Understand the concepts of hard tooth surface, soft tooth surface, open drive and closed drive; Master the force analysis of gear transmission, especially the determination of helical gear, bevel gear axial force and worm transmission; Understand the significance and influencing factors of load factor; Master the basic theory of tooth surface contact fatigue strength calculation and tooth root bending fatigue strength calculation of spur gear transmission, the significance and determination method of parameters and coefficients in the formula, master the design criteria and steps of gear transmission; Understand the significance of straight bevel gear back bevel and equivalent gear

(20) master the calculation of transmission ratio of fixed axle gear train and epicyclic gear train and the determination of steering relationship between driving and driven wheels; Understand the composition, motion characteristics and application of various gear trains< (21) understand the types and characteristics of key connection, pin connection and threaded connection; Master the selection and calculation of ordinary flat key, pre tightening and anti loosening of thread connection

(22) master the shaft type, failure mode and design requirements; Understand the common materials of the shaft, the problems that should be considered in the structural design and the measures to improve the strength of the shaft; Understand the stress analysis of shaft and the applicability of three strength design calculation methods< (23) understand the types and properties of friction; Understand the type and structure characteristics of sliding bearing; Understand the conditional calculation of non liquid friction sliding bearing, understand the type, structure, characteristics, accuracy, code and selection principle of rolling bearing; Master the failure forms of rolling bearings and the concepts of basic rated life, basic rated dynamic load and basic rated static load; Able to design rolling bearing combination structure

(24) understand the working principle, main types, structural characteristics and selection and application principles of coupling, clutch and brake.

8. A number of open files in ms_sql you can test with

1. dbo.sp_proc1 ' &# 39; P')
drop proc dbo.sp_proc1
go
create proc sp_proc1
as
< < ; dbo.proc1 '<

3.designate sp_proc1 to launch the launch operation

exec dbo.sp_procoption & #39; sp_proc1 ' &# 39; Startup ' & # 39; true & #39;