4f20btc1 diesel engine
2. The concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, open source software was designed and released, and P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
3. Unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity. The monetary system used to have no more than 10.5 million in four years, after which the total number will be permanently limited to 21 million.
preventive measures:
1. Start the firewall of windows first
2. Right click the network icon in the lower right corner - Sharing Center - Windows Firewall - Advanced Settings - inbound rules on the left - new port on the right - TCP - input these ports - deny access
In 2017, a global popular virtual currency is constantly brushing people's eyes
first, there was an outbreak of "blackmail" virus that raged all over the world. Hackers openly claimed that if they wanted to avoid "blackmail", they would have to hand in a certain amount of bitcoin
then, the Central Bank of China announced a ban on bitcoin trading in China, and the price of bitcoin plummeted
what is bitcoin
bitcoin is a virtual currency concept put forward by a person named "Nakamoto Tsung" in 2009. It does not rely on the issuance of government monetary institutions, but is generated through a series of complex programs and algorithms on the open Internet. Moreover, the total number of bitcoin is permanently limited to 21 million
again, the price of bitcoin is too high and the cost is getting higher and higher how many people can afford this invisible virtual coin without physical mortgage
to sum up, it is too early to say that bitcoin is a fraud, and it is too far fetched to say that it is the trend of the times
but for leek people like me, it's better not to touch such a virtual currency
< HR / >welcome to pay attention to the network account, soldier's military intelligence wing , for more content, you can pay attention to the wechat in my construction: tankt995969 user's website
GTX 1070ti is a sub flagship high-end graphics card just released by NVIDIA, which has been put on sale nationwide. Its performance positioning is between gtx1070 and gtx1080. Compared with GTX 1070, it has obvious advantages, and its performance is close to gtx1080. It is a sub flagship graphics card worth buying. How about GTX 1070ti graphics card? Let's share the performance test and evaluation of gtx1070ti compared with gtx1070 and gtx1080
gtx1070ti gpu-z screenshot
in terms of core frequency, gtx1070ti is limited to 1607-1683mhz by NVIDIA, so AIC manufacturers are not allowed to pre overclock, otherwise it will directly affect the sales of gtx1080, so the performance of gtx1070ti of each brand has little difference
test platform
hardware test platform accessories name brand model reference price processor Intel Core i7 7700k ￥ 999 radiator owl u12s -- graphics card gtx1070, gtx1070ti Gtx1080 ￥ 1249 motherboard ASUS tuf-z270 ￥ 679 memory Chichi Trident Z RGB series magic light halberd DDR4 2400 8g * 2 ￥ 599 hard disk OCZ vector 150 240g solid state hard disk ￥ 599 power supply anatik hcp-1200 ￥ 229 operating system win10 64bit 1709 -- driver geforce 388.13
hardware test platform, we chose flagship i7 7700k processor, z270 motherboard, 240g SSD, z270 motherboard, 240g SSD, z270 motherboard, z270 motherboard, 240g SSD 16g DDR4 memory combination, installed the latest win10 system and 88.13 driver
On July 1, 2002, Russian bus Kiel Airlines flight 2937 (btc2937) originally planned to fly from Moscow, the capital of Russia, to Barcelona, Spain. DHL express company flight 611 (dhx611), the original route is from Bahrain International Airport via Italy's Bergamo International Airport to Belgium's Brussels
two planes collided at 21:35 on (UTC + 8) July 1, 2002 over the Swiss city of ublingen on the Bank of Lake Bodensee in southern Germany. The vertical tail of flight 611 passed the lower left side of flight 2937, and the Tu-154 exploded and disintegrated into two sections
Flight 611 lost control and barely flew 7 km. Two minutes later, it crashed near a mountainside. One of its engines exploded and detached from the wing before the crash. A total of 71 passengers and crew members on the two flights were killed{rrrrrrr}
extended information:
other heavy air disasters in the world
1. Tenerife air crash, 583 people were killed
in the evening of March 27, 1977, on the runway of Los Rodeo airport in the autonomous Canary Islands off the North African coast of Spain, Two Boeing 747s loaded with fuel and passengers from Royal Dutch Airlines and Pan American Airlines collided. A total of 583 people on the two planes were killed in the flames
2. The air crash of JAL 123 killed 520 people.
the air crash of JAL 123 occurred on August 12, 1985. This Boeing 747-100sr flight, carrying 509 passengers and 15 crew members, is scheled to fly from Tokyo's Haneda airport to Osaka's IDAN airport
3. The air crash of Saudi Arabian Airlines flight 763 killed 349 people on November 12, 1996. The newly taking off flight 763 of Arabian Airlines and flight 1907 of Kazakhstan Airlines collided over chakidari near New Delhi, killing 349 people on both flights. This is the most serious air collision in the world's top ten air accidents
On August 19, 1980, after taking off from Riyadh International Airport, Saudi Arabian Airlines flight 163 reported a fire in the cargo hold. Although the plane successfully turned back, a total of 301 people on board did not survive May 25th, 1979 is a traditional American holiday, the memorial day of the dead. As one of the busiest airports in the world, O'Hare International Airport is actively transporting tourists to Los Angeles for vacation on that day. However, on that day, after the take-off of American Airlines flight 191, there was a major accident of engine falling off65 73 136 2
6.5g X Y Z
65 / 6.5g = 73 / x = 136 / y = 2 / Z
x = 7.3g
y = 13.6g
Z = 0.2g1 mass of hydrogen 0.2g
2 mass fraction of solute in dilute hydrochloric acid 7.3g/100g * 100% = 7.3%
3 mass fraction of solute in solution after reaction 13.6g / (6.5g + 100g-0.2g) * 100% = 12.8%
reference: http://emuch.net/journal/article.php?id=CJFDTotal-JZJI199312009