Round blockchain

1.

IPFs (interplanetary file system) interstellar file system was established by Juan Bennet in May 2014. It settled in Y combinator (successfully hatched airbnb, dorpbox, etc.) which is a famous business incubator in the United States, and obtained huge investment from YC. Meanwhile, Juan Bennet established protocol labs. At present, protocol labs include IPFs, filecoin, libp2p, libp2p, etc Most of the team members of the five independent projects, ipld and multiformats, are from internationally renowned universities, and Stanford University is the majority

the difference between IPFs and http:

Security: http is centralized, and all traffic is directly carried on the centralized server, which carries great pressure and is easy to cause system crash. HTTP is also vulnerable to DDoS attacks; The storage mode of IPFs is decentralized and partitioned distributed storage, which can not be attacked by hackers, files are not easy to be lost, and security is guaranteed

efficiency: http relies on the centralized service network, so the server is easy to be shut down and the files on the server are easy to be deleted. The server needs to be turned on 24 hours; IPFs adopts P2P network topology, all computers in the whole network can become storage nodes, and the nearby distributed storage greatly improves the network efficiency

cost: http centralized server needs high maintenance cost. Once the centralized database is attacked by DDoS or damaged by force majeure, all data will be lost; IPFs greatly reces the cost of server storage and bandwidth

The majority of HTTP customers' network access is not localized, with network delay. IPFs can greatly accelerate the speed of network access, and the sense of experience will be significantly improved

the use scenarios of IPFs:

< UL >

as a mounted global file system, mounted in IPFs and IPNs

as a mounted personal synchronization folder, automatic version management and publishing, As an encrypted file or data sharing system, as the version package manager of all software, as the root file system of virtual machine, as the boot file system of VM, as a database, applications can write data directly to Merkle da In G data model, obtain all versions, buffers, and IPFs provided allocation

as a linked (and encrypted) communication platform

as a CDN for integrity check of large files (without SSL)

as an encrypted CDN

on Web pages, As a web CDN

as a link, there will always be a new and eternal web

< / UL >

2. There are two types of sapphire rx460 platinum, one is 2G video memory, the other is 4G video memory, and only 4G super platinum. The other difference is not big. The main frequency of super platinum is a little higher, and the power supply is strengthened. I suggest super platinum. The official power is 75W.

3.

Good cost-effectiveness: options can obtain good cost-effectiveness. First, leverage provides users with precise hedging and trading tools. For the buyer, through the purchase of options, a larger amount of contract can be controlled with less option fee

for example, users expect the price of BTC to rise in the future and want to buy a BTC. An option contract represents 0.1 BTC, and the price of each option contract is 0.005 BTC. The user can obtain the corresponding position by purchasing 10 call option contracts, and the cost is only 0.05 BTC, which can well control the cost

high leverage gains: options can gain more returns with high leverage. With small money, you can make multiple profits

for example, the current share price of apple (AAPL) is $200 / share, and Xiao Wang thinks that the share price ratio of Apple will probably rise by 10 points in the next week. But Xiao Wang's capital is only $2000, and Soha's profit is only $200. Xiao Ming thinks it's too little

then Xiao Wang chooses the call option of apple stock which matures in a week and the exercise price is $210. The current value of the option may be $0.5/piece, and Xiao Wang's $2000 can buy 4000 options of Soha. A week later, if Apple's stock soars to $220 all the way smoothly, Xiao Wang can make a profit of $10 per option, and 4000 options will make a profit of $40000. Compared with the initial principal of $2000, Xiao Wang gets 20 times more income, and compared with the income of suoha stock, the option income is several times more

Of course, if Apple's stock does not perform as expected and does not rise to more than $210 a week later, Xiao Wang will lose the $2000 principal

4. Guangdong Science Center is the largest science popularization venue in the world. Guangdong Science Center is located at the west end of Xiaoguwei Island, Panyu District, Guangzhou, surrounded by water on three sides and Guangzhou University Town in the East. The overall architectural image of the exhibition hall is "science and technology aircraft carrier", and it is like "a blooming kapok", which symbolizes the development of science and technology in Guangdong and contains the four meanings of "science and technology pioneer, ride the wind and waves, smart culture, good luck"< There are eight exhibition areas in Guangdong Science Center, including "green home", "flying dream", "human and health", "perception and thinking", "experiment and discovery", "digital world", "transportation world" and "children's world"“ "Green home" shows the ecological environment of the earth and the crisis caused by improper human behavior“ "Flying dream" can let the audience follow the steps of human exploration and flight, understand the science and technology in the field of aerospace and related astronomical knowledge

"human and health" shows the knowledge and scientific concepts of human body and health, as well as the frontier knowledge of life science“ Through a series of perceptual activities, the exhibition area of "perception and thinking" skillfully combines brain science and psychology, enabling the audience to understand the brain mechanism and explore the mysterious field of perception and thinking“ "Experiment and discovery" shows the important scientific discoveries in the history of science, where the audience can participate in the classic process of scientific discovery, stimulate people's interest in science, and understand the basic scientific inquiry methods

in the "digital world" exhibition area, the audience can intuitively understand the basic knowledge of digital technology and the typical application of digital technology, "transportation world" shows the structure and working principle of automobile, automobile culture and the application of high and new technology in intelligent transportation“ "Children's world" is the most lively. It is for children under 12 years old. Through interactive games, role play, situational experience and hands-on participation, it enables children to discover the scientific phenomena in the world around them

most of the projects in these exhibition areas are interactive, and the audience can fully experience the fun of the mystery of science through their own participation. In addition to the exhibition hall mentioned above, there are the largest giant screen cinemas in Asia. These four cinemas are 3D giant screen stereoscopic cinema, virtual navigation dynamic cinema, 4D cinema and digital ball screen cinema. The screen of 3D giant screen cinema here is as high as seven or eight floors, cool and exciting. In Guangdong Science Center, you can have a good day at home.

5. Hello
you configure this gtx650ti, you play these games awesome.
just change the graphics card
choose satisfied.

6. No problem, you can check the registration certificate, regulatory authority, and operation certificate of the exchange.

7. The k20p battery is bigger, with a lift forward camera, rotor motor. Mi9 has a smaller battery, thinner body than k20p, 27W wireless charging and better motor than k20p. It's not about personal needs
redmi is red rice. Hongmi is a sub brand of Xiaomi