Ⅰ. Exchange Rates Excharge rates are the rates at which currency conversion takes place. They themselves tell us nothing about the relative strength of the currencies involved or economics behind them, It simply refl...Ⅰ. Exchange Rates Excharge rates are the rates at which currency conversion takes place. They themselves tell us nothing about the relative strength of the currencies involved or economics behind them, It simply reflects the difference between the denominations into which the two countries have chosen to divide their respective currencies. A currency is considered externally weak if the government is having difficulty maintaining the predetermined exchange rates under展开更多
Like most developing countries, China has been adopting a multiple exchange rate regime in its attempt to maintain control and order while liberalizing transactions in the sphere of trade, non-trade and crossborder fu...Like most developing countries, China has been adopting a multiple exchange rate regime in its attempt to maintain control and order while liberalizing transactions in the sphere of trade, non-trade and crossborder fund flows. From a very rigid, highly centralized regime in 1979, China has by now advanced to a relatively flexible system under which the official rate, the swap rate, and the ＂free＂ market rate coexist. The tight control of international transfer of funds has also been progressively relaxed, as different parties gain increasing freedom to acquire foreign exchange. The Chinese economy has been reasonably stable during the Asian financial crisis. Although China maintains the exchange rate stability, in near future a real appreciation of the RMB must be necessary element in global adjustment. More flexible exchange rate will give more advantages for Chinese economy.展开更多
Increasing bandwidth requirements have posed significant challenges for traditional access networks.It is difficult for intensity modulation/direct detection to meet the power budget and flexibility requirements of th...Increasing bandwidth requirements have posed significant challenges for traditional access networks.It is difficult for intensity modulation/direct detection to meet the power budget and flexibility requirements of the next-generation passive optical network(PON)at 100G and beyond considering the new requirements.This is driving researchers to develop novel optical access technologies.Low-cost,wide-coverage,and high-flexibility coherent PON is emerging as a strong contender in the competition.In this article,we will review technologies that reduce the complexity of coherent PON(CPON),enabling it to meet the commercial requirements.Also,advanced algorithms and architectures that can enhance system coverage and flexibility are also discussed.展开更多
文摘Ⅰ. Exchange Rates Excharge rates are the rates at which currency conversion takes place. They themselves tell us nothing about the relative strength of the currencies involved or economics behind them, It simply reflects the difference between the denominations into which the two countries have chosen to divide their respective currencies. A currency is considered externally weak if the government is having difficulty maintaining the predetermined exchange rates under
文摘Like most developing countries, China has been adopting a multiple exchange rate regime in its attempt to maintain control and order while liberalizing transactions in the sphere of trade, non-trade and crossborder fund flows. From a very rigid, highly centralized regime in 1979, China has by now advanced to a relatively flexible system under which the official rate, the swap rate, and the ＂free＂ market rate coexist. The tight control of international transfer of funds has also been progressively relaxed, as different parties gain increasing freedom to acquire foreign exchange. The Chinese economy has been reasonably stable during the Asian financial crisis. Although China maintains the exchange rate stability, in near future a real appreciation of the RMB must be necessary element in global adjustment. More flexible exchange rate will give more advantages for Chinese economy.
基金supported in part by the National Key Research and Development Program of China(No.2023YFB2905700)in part by the National Natural Science Foundation of China(Nos.62171137,62235005,and 61925104)in part by the Natural Science Foundation of Shanghai(No.21ZR1408700)。
文摘Increasing bandwidth requirements have posed significant challenges for traditional access networks.It is difficult for intensity modulation/direct detection to meet the power budget and flexibility requirements of the next-generation passive optical network(PON)at 100G and beyond considering the new requirements.This is driving researchers to develop novel optical access technologies.Low-cost,wide-coverage,and high-flexibility coherent PON is emerging as a strong contender in the competition.In this article,we will review technologies that reduce the complexity of coherent PON(CPON),enabling it to meet the commercial requirements.Also,advanced algorithms and architectures that can enhance system coverage and flexibility are also discussed.
