Xu Tuanwei, Li Fang, Ma Lilong Distributed Acoustic Sensor, Institute of Semiconductor, Chinese Academy of Sciences（Distributed Acoustic Sensing，DAS）The technology utilizes the phase of coherent backscattered Rayleigh light instead of the intensity to detect signals such as sound or vibration within the audio range, and not only can the magnitude of the phase amplitude be used to provide sound ...
In the previous article "Development Route of Fiber Optic Sensing Technology in China: Current Status of Key Technology Development", we introduced the development paths of several key technologies in fiber optic sensing, including special optical fibersFBG, fiber optic gyroscope, fiber optic hydrophone, distributed Brillouin fiber Ф-OTDR、OFDRElaborate on the development of these types of technologies ...
After more than forty years of academic research and technological development, optical fiber sensing technology has formed an accelerating trend in recent years. There are two main reasons for this: firstly, optical fiber sensing technology has been widely applied in several practical scenarios; The second is the development and application of micro nano technology, material technology, and biotechnology, also known as optical fiber ...
Introduction: The scale of China's fiber laser market is constantly expanding, the laser industry chain is becoming increasingly mature, and the market share of domestic lasers has significantly increased. The root cause of this is the increase in the proportion of core components domestically produced. In the past decade or so, China's laser industry has ushered in a golden period of development. Especially for fiber lasers in the midstream ...
Zhang Ming and Chen Yinmo: The US dollar index has climbed to a new high, and the market is starting to debate whether the Chinese yuan will fall below7.0Da Guan. What is the most important reason for the depreciation of the RMB against the US dollar this year? How to move forward in the near future? Influenced by the tough stance of Federal Reserve Chairman Powell at the Jackson Hole meeting, the US dollar index climbed to109of20 ...
Fu Haitang, born as a farmer, spent only one and a half years catching three waves of market trends through garlic and cotton varieties5Wan did it1.2Yiyi became a legend in the futures industry and became famous from then on. Do not read any technical charts or conduct any technical analysis, and use the "Heavenly Way" concept to understand and analyze the market ...
Cailian Society9month1Daily News (Editor Under the recent "hawk" winds from Federal Reserve officials, market expectations for the Fed's interest rate cut next year have gradually cooled. According to the research companyDataTrekThe market currently expects the Federal Reserve to2023The possibility of policies in the first half of the year is almost zero, but in the market ...
The exchange rate of the US dollar against a basket of other currencies is on the verge of rising for the third consecutive month. The US dollar is rising20After the annual high, it is on the verge of rising for the third consecutive month, which clearly reflects the conflicting interest rate and growth prospects of the world's largest economy. The US dollar index that measures the exchange rate of the US dollar against a basket of other currencies ...
Goldman Sachs believes that the current decline in commodities is mainly caused by the disconnect between the futures market and the spot market, and the exaggerated weakness of the commodity market due to a lack of liquidity is actually a very attractive starting point. Last night in the market, the United StatesWTICrude oil and Brent crude oil10Monthly crude oil futures average ...
The China Federation of Logistics and Procurement and the Service Industry Survey Center of the National Bureau of Statistics released today8Purchasing Managers' Index of China's Manufacturing Industry for the Month(PMI)by49.4%, up from last month0.4By percentage points, the economic operation is showing a slow to steady trend. The changes in the sub index indicate that the production activities of enterprises remain stable, and the prices of raw materials and finished products remain stable ...
Mathematics questions for this year's college entrance examination It's not difficult, it's changed | Source:pixabay.comguide Objectively speaking, reading the math questions in this year's college entrance examination is not difficult, but has changed. The face has changed, making it difficult for teachers and candidates who are accustomed to brushing questions to adapt. This change also reminds us: brush question education is gone forever! stay ...
At present, with the continuous interest rate hike cycle in most developed countries, the rhetoric of inflation cooling and economic recession continues to ferment, and the most core of this lies in the comparison between the two major economies of the United States and Europe. Affected by fluctuations in energy prices, the United States7Monthly inflation has shown a slowing trend, while the eurozone is not as happy as the United States in comparison ...
Consumer prices in Europe's largest economy, driven by soaring energy and food costs, have risen to8.8%of40Annual high point. As of8In the year of the month, Germany's inflation rate accelerated to8.8%of40Annual high point. This number reinforces calls for the European Central Bank to accelerate the pace of interest rate hikes at next week's meeting of policy makers ...
Western leaders praised the role played by the reformer in peacefully ending the Cold War, and Putin only issued a low-key statement through a spokesperson. Russian official media quoted Moscow Central Clinical Hospital on Tuesday as saying that Mikhail Gorbachev, the last leader of the former Soviet Union(Mikhail Gorbachev)Death ...
The onshore RMB exchange rate has fallen below6.90 8month29Daytime, onshore USD/The RMB exchange rate broke through the opening after jumping short and opening low6.90At the checkpoint, the exchange rate between the US dollar and the Chinese yuan stabilized thereafter6.90And in the6.90-6.9250Running within the interval of (Chart1）This is the onshore RMB exchange rate from2020year8For the first time since the month ...
