Baoan passenger transport center to Xiaomeisha
Publish: 2021-05-24 16:00:28
1. Network payment refers to the payment of digital currency by the parties to the transaction through the network. At present, the main payment methods are credit card payment, e-check, e-cash and smart card. At the same time, many types of payment schemes have been derived. E-money is a kind of credit currency circulating in the credit card market by means of electronic technology and communication, which reflects the value of goods in legal currency unit. Electronic currency is a kind of credit currency which uses electronic pulse instead of paper for capital transmission and storage. The use of e-money is simple, that is, the use and settlement of e-money is not limited by the amount, the object and the region, and the use is extremely simple
according to the different tools used, e-money can be divided into three categories: the first category is e-cash, such as e-cash, e-wallet, e-change, etc; The second is electronic credit card, such as smart card; The third category is e-check, such as e-bill. There are three corresponding payment methods: e-cash payment, e-credit card payment and e-check payment< (1) e-cash. E-cash is a cash currency in the form of electronic number. E-cash has more advantages than the existing real cash. The actual cash has to bear greater storage risk, high transmission cost, greater security and investment. The issuing methods of e-cash include prepaid card (e-wallet) and user number data file in the form of pure electronic system
e-wallet means that users can purchase prepaid cards acceptable to specific sellers
prepaid card and savings card are generally used for micro payment, which can be accepted on POS machines of many businesses, and to increase the acceptability of the system. For example, smart cards with e-cash function issued by banks, various savings cards, etc
(2) electronic credit card (e-wallet)
credit card payment is the most commonly used tool and means in electronic payment, which can be used in shopping malls, restaurants, stations and many other places. Payment can be made by credit card, POS and ATM. With the development of technology, credit card has developed from magnetic stripe card to more secure smart card which can read and write a lot of data. People call it electronic credit card or & quot; E-wallet & quot;. E-wallet can also be said to be an electronic payment tool based on WWW browser, which can show how much money users still have on their smart cards, and transfer funds among multiple e-wallets in the case of mutual recognition
(3) e-check
e-check is a kind of electronic payment tool commonly used in Internet banking. To change a check into an electronic message with a digital signature, or to replace all the information of a traditional check with other digital messages, is an electronic check. With the help of electronic check, the payment business and payment process can be electronic. Internet banking and most banking and financial institutions, through the establishment of electronic check payment system, send and receive electronic checks among banks, to provide users with electronic payment services. For example, through the bank automatic teller machine (ATM) network system to pay a certain range of ordinary expenses; Through the electronic exchange and clearing across provinces and cities, the nationwide fund transmission can be realized; Large amount of funds (from several thousand to several million yuan) transfer between banks all over the world and so on
in addition to the above e-cash, e-credit card and e-check, there are also e-change, secure change, online currency and digital currency. The common feature of these payment tools is that cash or currency is paperless, electronic and digital, which is concive to the transmission, payment and settlement in the network, the use of Internet banking, and the realization of electronic payment and online payment
at present, the most common payment methods are as follows: 1. Banks use computers to process inter-bank business and handle settlement; 2. Settlement between bank computers and computers of other institutions; 3. Using network terminal to provide customers with various banking services, such as customers' withdrawal and deposit on ATM; 4. To provide customers with automatic dection service through bank point of sale terminal (POS), which is the main way of electronic payment at present; 5. Online payment, that is, electronic payment, can be directly transferred and settled through the Internet anytime and anywhere, forming an e-commerce environment, etc.
2. What are digital signature, digital certificate and Ca
digital signature
so called & quot; Digital Signature & quot; It is to generate a series of symbols and codes to form an electronic password for signature through a certain cryptographic operation, instead of writing a signature or seal. For this kind of electronic signature, technical verification can also be carried out, and the accuracy of verification can not be compared with that of manual signature and stamp verification& quot; Digital Signature & quot; It is the most popular, mature and operable electronic signature method in e-commerce and e-government. It uses standardized proceres and scientific methods to identify the signer and recognize the content of an electronic data. It can also verify whether the original text of the document has changed in the process of transmission, and ensure the integrity, authenticity and non repudiation of the transmitted electronic document
digital certificate
e to the Internet e-commerce system technology, customers who shop online can easily obtain the information of businesses and enterprises, but it also increases the risk of abusing some sensitive or valuable data, In order to prevent fraud in the process of transaction and payment, a trust mechanism must be established on the Internet. This requires that buyers and sellers who participate in e-commerce must have a legal identity and be able to be verified effectively on the Internet. Digital certificate is an authoritative electronic document. It provides a way to verify your identity on the Internet, which is similar to the driver's license or ID card in daily life. It is issued by CA certificate authority, an authoritative organization. People can use it to identify each other in Internet communication. Of course, in the process of digital certificate authentication, certificate authority (CA) as an authoritative, fair and reliable third party, its role is crucial
CA
CA - is the certificate issuing authority, which is the core of PKI. CA is responsible for issuing certificates, authentication certificates and managing the issued certificates. It should make policies and specific steps to verify and identify the user's identity, and sign the user's certificate to ensure the identity of the certificate holder and the ownership of the public key.
according to the different tools used, e-money can be divided into three categories: the first category is e-cash, such as e-cash, e-wallet, e-change, etc; The second is electronic credit card, such as smart card; The third category is e-check, such as e-bill. There are three corresponding payment methods: e-cash payment, e-credit card payment and e-check payment< (1) e-cash. E-cash is a cash currency in the form of electronic number. E-cash has more advantages than the existing real cash. The actual cash has to bear greater storage risk, high transmission cost, greater security and investment. The issuing methods of e-cash include prepaid card (e-wallet) and user number data file in the form of pure electronic system
e-wallet means that users can purchase prepaid cards acceptable to specific sellers
prepaid card and savings card are generally used for micro payment, which can be accepted on POS machines of many businesses, and to increase the acceptability of the system. For example, smart cards with e-cash function issued by banks, various savings cards, etc
(2) electronic credit card (e-wallet)
credit card payment is the most commonly used tool and means in electronic payment, which can be used in shopping malls, restaurants, stations and many other places. Payment can be made by credit card, POS and ATM. With the development of technology, credit card has developed from magnetic stripe card to more secure smart card which can read and write a lot of data. People call it electronic credit card or & quot; E-wallet & quot;. E-wallet can also be said to be an electronic payment tool based on WWW browser, which can show how much money users still have on their smart cards, and transfer funds among multiple e-wallets in the case of mutual recognition
(3) e-check
e-check is a kind of electronic payment tool commonly used in Internet banking. To change a check into an electronic message with a digital signature, or to replace all the information of a traditional check with other digital messages, is an electronic check. With the help of electronic check, the payment business and payment process can be electronic. Internet banking and most banking and financial institutions, through the establishment of electronic check payment system, send and receive electronic checks among banks, to provide users with electronic payment services. For example, through the bank automatic teller machine (ATM) network system to pay a certain range of ordinary expenses; Through the electronic exchange and clearing across provinces and cities, the nationwide fund transmission can be realized; Large amount of funds (from several thousand to several million yuan) transfer between banks all over the world and so on
in addition to the above e-cash, e-credit card and e-check, there are also e-change, secure change, online currency and digital currency. The common feature of these payment tools is that cash or currency is paperless, electronic and digital, which is concive to the transmission, payment and settlement in the network, the use of Internet banking, and the realization of electronic payment and online payment
at present, the most common payment methods are as follows: 1. Banks use computers to process inter-bank business and handle settlement; 2. Settlement between bank computers and computers of other institutions; 3. Using network terminal to provide customers with various banking services, such as customers' withdrawal and deposit on ATM; 4. To provide customers with automatic dection service through bank point of sale terminal (POS), which is the main way of electronic payment at present; 5. Online payment, that is, electronic payment, can be directly transferred and settled through the Internet anytime and anywhere, forming an e-commerce environment, etc.
2. What are digital signature, digital certificate and Ca
digital signature
so called & quot; Digital Signature & quot; It is to generate a series of symbols and codes to form an electronic password for signature through a certain cryptographic operation, instead of writing a signature or seal. For this kind of electronic signature, technical verification can also be carried out, and the accuracy of verification can not be compared with that of manual signature and stamp verification& quot; Digital Signature & quot; It is the most popular, mature and operable electronic signature method in e-commerce and e-government. It uses standardized proceres and scientific methods to identify the signer and recognize the content of an electronic data. It can also verify whether the original text of the document has changed in the process of transmission, and ensure the integrity, authenticity and non repudiation of the transmitted electronic document
digital certificate
e to the Internet e-commerce system technology, customers who shop online can easily obtain the information of businesses and enterprises, but it also increases the risk of abusing some sensitive or valuable data, In order to prevent fraud in the process of transaction and payment, a trust mechanism must be established on the Internet. This requires that buyers and sellers who participate in e-commerce must have a legal identity and be able to be verified effectively on the Internet. Digital certificate is an authoritative electronic document. It provides a way to verify your identity on the Internet, which is similar to the driver's license or ID card in daily life. It is issued by CA certificate authority, an authoritative organization. People can use it to identify each other in Internet communication. Of course, in the process of digital certificate authentication, certificate authority (CA) as an authoritative, fair and reliable third party, its role is crucial
CA
CA - is the certificate issuing authority, which is the core of PKI. CA is responsible for issuing certificates, authentication certificates and managing the issued certificates. It should make policies and specific steps to verify and identify the user's identity, and sign the user's certificate to ensure the identity of the certificate holder and the ownership of the public key.
2. The name is: come back my love
the taste of missing
just like this cup of bitter coffee
although you can add some sugar
it's still gaunt
the past can't be traced back
the memory seems like the cold wind blowing
it was all my fault at the beginning, which made you sad and never look back
now I regret all night and hope you can return
without you in the future,
how should I face
God, please give me a chance
to compensate my sweetheart for some comfort
If life can be reincarnated
I'd rather go back in time
tomorrow, I'll suffer
let my mood be surrounded by loneliness
hope, Maybe you can understand
Forgive me for what I have done
come back my love
come back my love ~ my love
the song "come back my love" has reached the top level in terms of proction level and singing emotion. Fenglei spared no effort to pour out his passion and persistence for music, with smooth and penetrating voice, In the interpretation of this song "come back my love", it is more incisive. The attitude towards the work is becoming more and more strict. It requires the perfection of every word and intonation. It injects the song into its own inner expression and personality, so that "come back my love", a popular golden song in Asia, has been greatly sublimated. All the listeners have a long aftertaste and enring listening, which makes us feel like we are humming a few songs with the familiar melody. The classic love song "come back my love" is filled with the most sentimental feelings, conquering your ears.
the taste of missing
just like this cup of bitter coffee
although you can add some sugar
it's still gaunt
the past can't be traced back
the memory seems like the cold wind blowing
it was all my fault at the beginning, which made you sad and never look back
now I regret all night and hope you can return
without you in the future,
how should I face
God, please give me a chance
to compensate my sweetheart for some comfort
If life can be reincarnated
I'd rather go back in time
tomorrow, I'll suffer
let my mood be surrounded by loneliness
hope, Maybe you can understand
Forgive me for what I have done
come back my love
come back my love ~ my love
the song "come back my love" has reached the top level in terms of proction level and singing emotion. Fenglei spared no effort to pour out his passion and persistence for music, with smooth and penetrating voice, In the interpretation of this song "come back my love", it is more incisive. The attitude towards the work is becoming more and more strict. It requires the perfection of every word and intonation. It injects the song into its own inner expression and personality, so that "come back my love", a popular golden song in Asia, has been greatly sublimated. All the listeners have a long aftertaste and enring listening, which makes us feel like we are humming a few songs with the familiar melody. The classic love song "come back my love" is filled with the most sentimental feelings, conquering your ears.
3. Sour sweet - S.H.E / Fahrenheit lyrics
sour sweet (the latest advertising theme song of Mengniu yoghurt) lyrics:
the good taste of sour sweet
it's up to me (it's up to me)
Lala la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la There is no upper limit to the curve of the upper circumference
to keep fresh
I feel free to choose
sour sweet (the latest advertising theme song of Mengniu yoghurt) lyrics:
the good taste of sour sweet
it's up to me (it's up to me)
Lala la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la la There is no upper limit to the curve of the upper circumference
to keep fresh
I feel free to choose
4. Different load, different speed, different resistance
it can be calculated by P = FV
to get the maximum resistance of water flow to the ship f = Pmax / Vmax
the resistance coefficient should be related to the resistance, and the resistance is related to the ship speed - f
that is, the resistance coefficient also changes
only the shipbuilding professional designers can answer specifically
for reference only!
it can be calculated by P = FV
to get the maximum resistance of water flow to the ship f = Pmax / Vmax
the resistance coefficient should be related to the resistance, and the resistance is related to the ship speed - f
that is, the resistance coefficient also changes
only the shipbuilding professional designers can answer specifically
for reference only!
5. Some
as long as two objects have pressure, friction will occur, because no absolutely smooth material has been found
as long as two objects have pressure, friction will occur, because no absolutely smooth material has been found
6. If you say friction is resistance,
the resistance in water will be greater
the resistance in water will be greater
7. Yes
the ship is under the friction of water. This friction is very large.
the ship is under the friction of water. This friction is very large.
8.
Kant also discussed the cause of the tide, but it was in 1754 when the Royal College of Prussia offered a reward for his views. Kant put forward a new opinion in his paper "Research on whether the earth has changed in its rotation which causes the alternation of day and night since its initial formation period and how to confirm this change" (1754), which is "the earth's rotation graally slows down e to the friction of tides" pointed out by Engels. Kant thought: "there is an external reason, and it is such an external reason, it makes the earth's movement graally weaken, and in an immeasurable long period, it will even destroy the earth's rotation."
9. Knots = 1852 M / h
why is "knots" used to express navigation speed? What does "knots" mean< In fact, in the 16th century, the navigation instry was quite developed, but there were no clocks, voyage recorders and other instruments to accurately determine the speed of a ship. So, a clever sailor came up with a clever method: when the ship was sailing, he threw a rope tied with a floating body to the sea, and divided the rope into several knots by tying knots on the rope. According to the knots of the rope pulled out in a certain time, he calculated the ship's speed, so "knots" became the unit of measurement of the ship's sailing speed on the sea. The speed of sea water velocity, sea wind speed, torpedo and other underwater weapons are also represented by "knots". In fact, the rope speed method is not very accurate. With the development of science and technology, the speed measuring instruments of modern seagoing ships can directly display the speed by digital, but "knots" is still used as the unit of measuring various speeds at sea. The modern precise meaning of "section" is driving 1 nautical mile per hour (1 nautical mile = 1852 meters).
why is "knots" used to express navigation speed? What does "knots" mean< In fact, in the 16th century, the navigation instry was quite developed, but there were no clocks, voyage recorders and other instruments to accurately determine the speed of a ship. So, a clever sailor came up with a clever method: when the ship was sailing, he threw a rope tied with a floating body to the sea, and divided the rope into several knots by tying knots on the rope. According to the knots of the rope pulled out in a certain time, he calculated the ship's speed, so "knots" became the unit of measurement of the ship's sailing speed on the sea. The speed of sea water velocity, sea wind speed, torpedo and other underwater weapons are also represented by "knots". In fact, the rope speed method is not very accurate. With the development of science and technology, the speed measuring instruments of modern seagoing ships can directly display the speed by digital, but "knots" is still used as the unit of measuring various speeds at sea. The modern precise meaning of "section" is driving 1 nautical mile per hour (1 nautical mile = 1852 meters).
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