AI quantitative transaction - Tushare financial data framework

AI quantitative transaction (2) - Tushare financial data framework I. Tushare 1. Tushare Tushare is a free and open-source python financial data interface package. At present, it is Tushare Pro version. It mainly realizes the process of data collection, cleaning and processing to data storage for financial data such as stocks. It can provide f ...

Posted on Sat, 16 Nov 2019 12:46:25 -0500 by tsukushi

java instance understands the concept of blockchain

The core of blockchain is decentralized storage. Traditional database solutions, including relational database and non relational database, belong to centralized storage. Decentralized storage means that there is no data center, and each data node contains the information of the previous data node. An example is given to understan ...

Posted on Sun, 10 Nov 2019 16:38:52 -0500 by karan23424

Using shuttle to realize cross-chain asset exchange on bytom

Recently, shuttle, which is based on different asset exchange tools on the original chain, is very attractive because it can exchange not only different assets on the same chain, but also various assets on different block chain platforms. This tool lays the foundation for the complete decentralization of assets in the process of transaction wit ...

Posted on Thu, 26 Sep 2019 02:55:47 -0400 by taskagent

Learning Block Chain-1-Transaction|Block|POW by Building Block Chain

Links to the original text: https://medium.com/@vanflymen/learn-blockchains-by-building-one-117428612f46 Transaction Block Block proof of work You're here because, like me, you're excited about the rise of encrypted money. You want to know how block chains work - the basic technology behind them. But understanding block chains is not easy -- ...

Posted on Sun, 15 Sep 2019 03:54:59 -0400 by mlewczuk

Web3j 4.x Mobile Wallet Development Tutorial [with Java Source]

This tutorial explains how to use the Ethernet node provided by Web3j 4.x and Infura to develop the Ethernet wallet application for Android mobile phones. The tutorial includes project dependency configuration, Ethernet node selection, Ethernet wallet address creation, testing the acquisition of Ethernet currency, executing Ethernet currency tr ...

Posted on Tue, 10 Sep 2019 20:54:42 -0400 by brokeDUstudent

EOS Block Chain Account Name Not Started

Introduction From the previous section, we know that accounts in EOS systems must follow two guidelines Must be less than 13 characters It can only contain the following characters:.12345 abcdefghijklmnopqrstuvwxyzWhy does EOS do this, what is the benefit of it, and how does it work in EOS source code? Let's analyze and answer these questions ...

Posted on Thu, 05 Sep 2019 23:15:27 -0400 by jellis

Building a Block Chain with Go--Part 2: Workload Proof

stay Preceding text In this paper, we construct a very simple data structure, which is also the core of the whole block chain database. At present, the prototype of block chain has been completed, and blocks can be linked through the chain relationship: each block is connected to the previous block. However, the block chain we implemented has ...

Posted on Tue, 21 May 2019 15:51:13 -0400 by Dr Evil

Block Chain Introduction Tutorial Sharing Block Chain POW Proof Code Implementation demo

Brotherly Block Chain Introduction Tutorial Sharing Block Chain POW Proof Code Implementation demo Here we emphasize the protocol hierarchy of block chains. Application layer Contract level Incentive mechanism Consensus level Network layer Data layer In the last article, we mainly realized the data layer of block chain. The main technology used ...

Posted on Fri, 01 Feb 2019 05:39:15 -0500 by scarface222

In-depth Analysis of CMD in Brotherly Block Chain Course eth Source Code Analysis (II)

Resolution of each subcommand initiated by the main function of get subpackage under cmd package /geth init function: Import the json of the Genesis Block with the specified json as the Genesis Block args:<genesisPath> demo: init /home/yujian/eth-go/genesis.json Note: ethereum defaults to create a. ethereum directory with a path ...

Posted on Wed, 30 Jan 2019 20:45:14 -0500 by spider.nick

chain-indexer Block Chain Index I

chain_indexer Block Chain Index chain_indexer.go Source Parsing Chain_indexer, as its name implies, is the function used to create indexes for block chains. BloomIndexer is a special implementation of chain_indexer. It can be understood as a derived class. The main function is actually implemented in chain_indexer. Although it's a derived class ...

Posted on Tue, 29 Jan 2019 23:45:15 -0500 by jmansa