We numerically investigate a coupled-resonator structure consisting of a stub resonator and a nanodisk resonator using a two-dimensional finite element method. Simulation results show that plasmon-induced transparency...We numerically investigate a coupled-resonator structure consisting of a stub resonator and a nanodisk resonator using a two-dimensional finite element method. Simulation results show that plasmon-induced transparency （PIT） occurs in the transmission spectra, and the sharp asymmetric Fano lines increase the sensitivity to 1.4 ×10^3 nm/RIU. We also analyze the properties of the structure with different radii of the nanodisk and the length of the tooth cavity. Moreover, we find that the PIP only happens when the staggered system is around a fixed location with different separate distances, which is not similar to the previous researches. Our model may be important to photonic-integrated circuits and the sensitivity in sensors.展开更多
WORK is well underway on a study by Chinese experts to identify and rectify technical and managerial troubles bedeviling the legend- ary Tanzania-Zambia Railway Authority （TAZARA）. Originally completed in 1975, and ...WORK is well underway on a study by Chinese experts to identify and rectify technical and managerial troubles bedeviling the legend- ary Tanzania-Zambia Railway Authority （TAZARA）. Originally completed in 1975, and financed and built by China, the line is cur- rently facing imminent collapse due to mismanagement, financial difficulties and inadequate maintenance.展开更多
WHILE at school in the 1980s, Wang Xiangdong＇s knowledge about Africa centered on the TAZARA Railway a turnkey project financed and completed by China in the 1970s. While being proud of the project symbolizing the de...WHILE at school in the 1980s, Wang Xiangdong＇s knowledge about Africa centered on the TAZARA Railway a turnkey project financed and completed by China in the 1970s. While being proud of the project symbolizing the depth of Sino-African friendship, Wang was intrigued by the remote continent, but never in his wildest dreams expected that his future would be intertwined with Africa. After graduating from university in 1997, Wang joined China Civil Engineering Construction Corp, （CCECC） and one year later was sent to Africa to begin his long associa- tion with the continent.展开更多
In early July, a manhunt message posted on dahe.cn, a local Web portal in central China’s Henan Province, caused great concern among netizens. In the post, Zhao Guanle, a police officer in Ruyang County who was inves...In early July, a manhunt message posted on dahe.cn, a local Web portal in central China’s Henan Province, caused great concern among netizens. In the post, Zhao Guanle, a police officer in Ruyang County who was investigating several ATM fraud cases, provided a screenshot of the face of a young man who was suspected of committing the fraud and asked netizens knowing the man to help the police展开更多
Famous Chinese film director Chen Kaige has made a big comeback with the release of his visually breathtaking movie The Promise, a $44 million mythological epic said to be the most expensive film in the history of Chi...Famous Chinese film director Chen Kaige has made a big comeback with the release of his visually breathtaking movie The Promise, a $44 million mythological epic said to be the most expensive film in the history of Chinese cinema. As with every project Chen is involved in, the film has drawn extensive attention before and after its screening. Having been given a Golden Globe nomination for展开更多
Residents along the Qinghai-Tibet Railway have complicated feelings about the coming trains Talking about the train that will soon roar past his village, Pingcuo Dundan, a Tibetan junior middle school student, seems o...Residents along the Qinghai-Tibet Railway have complicated feelings about the coming trains Talking about the train that will soon roar past his village, Pingcuo Dundan, a Tibetan junior middle school student, seems overwhelmed. For him, travel by rail is a mysterious thing.展开更多
For discrimination of the common W-junction and Y-junction in the labels of line drawing for a three-dimensional manifold plane surface with trihedral vertices, the existing algorithms are almost using angles between ...For discrimination of the common W-junction and Y-junction in the labels of line drawing for a three-dimensional manifold plane surface with trihedral vertices, the existing algorithms are almost using angles between two adjacent lines and W-junction and Y- junction＇s definitions, and other complex methods. This passage gives four methods with their detailed mathematical inference processes in order to use these algorithms implemented by computer. The algorithms listed are Angle Summation method and Points to the Line method, Triangle methods which are the Triangle Area method and the Cross method. When the computer programs discriminate junctions, by comparison, the Angle Summation method and Points to the Line method are less efficacious than the Triangle method, and Cross method is more efficacious than the Triangle Area method in the Triangle method.展开更多
A new radio spectral receiving system has been installed on the 25 m radio telescope of the Urumqi Astronomical Observatory. The back end is a surface acoustic wave chirp transform spectrometer (SAW CZT), used for the...A new radio spectral receiving system has been installed on the 25 m radio telescope of the Urumqi Astronomical Observatory. The back end is a surface acoustic wave chirp transform spectrometer (SAW CZT), used for the first time in radio astronomy. The calibration of the line observations has carefully been investigated for the new-type spectrometer. In order to test the feasibility of the prototype spectrometer, we observed water maser emission from a number of known Galactic sources. We describe the observed spectra of W49N, W3(OH), 2248+600 and 1909+090. We found that W49N spectrum showed high-velocity features ranging from -330 to 146 km s-1. In comparison with the spectra observed by Medicina, the feature at the LSR velocity -52 km s-1 in the W3(OH) presented the rapid variation in flux density.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11374041 and 11404030the Fund of State Key Laboratory of Information Photonics and Optical Communications of Beijing University of Posts and Telecommunications of China
文摘We numerically investigate a coupled-resonator structure consisting of a stub resonator and a nanodisk resonator using a two-dimensional finite element method. Simulation results show that plasmon-induced transparency （PIT） occurs in the transmission spectra, and the sharp asymmetric Fano lines increase the sensitivity to 1.4 ×10^3 nm/RIU. We also analyze the properties of the structure with different radii of the nanodisk and the length of the tooth cavity. Moreover, we find that the PIP only happens when the staggered system is around a fixed location with different separate distances, which is not similar to the previous researches. Our model may be important to photonic-integrated circuits and the sensitivity in sensors.
文摘WORK is well underway on a study by Chinese experts to identify and rectify technical and managerial troubles bedeviling the legend- ary Tanzania-Zambia Railway Authority （TAZARA）. Originally completed in 1975, and financed and built by China, the line is cur- rently facing imminent collapse due to mismanagement, financial difficulties and inadequate maintenance.
文摘WHILE at school in the 1980s, Wang Xiangdong＇s knowledge about Africa centered on the TAZARA Railway a turnkey project financed and completed by China in the 1970s. While being proud of the project symbolizing the depth of Sino-African friendship, Wang was intrigued by the remote continent, but never in his wildest dreams expected that his future would be intertwined with Africa. After graduating from university in 1997, Wang joined China Civil Engineering Construction Corp, （CCECC） and one year later was sent to Africa to begin his long associa- tion with the continent.
文摘In early July, a manhunt message posted on dahe.cn, a local Web portal in central China’s Henan Province, caused great concern among netizens. In the post, Zhao Guanle, a police officer in Ruyang County who was investigating several ATM fraud cases, provided a screenshot of the face of a young man who was suspected of committing the fraud and asked netizens knowing the man to help the police
文摘Famous Chinese film director Chen Kaige has made a big comeback with the release of his visually breathtaking movie The Promise, a $44 million mythological epic said to be the most expensive film in the history of Chinese cinema. As with every project Chen is involved in, the film has drawn extensive attention before and after its screening. Having been given a Golden Globe nomination for
文摘Residents along the Qinghai-Tibet Railway have complicated feelings about the coming trains Talking about the train that will soon roar past his village, Pingcuo Dundan, a Tibetan junior middle school student, seems overwhelmed. For him, travel by rail is a mysterious thing.
文摘For discrimination of the common W-junction and Y-junction in the labels of line drawing for a three-dimensional manifold plane surface with trihedral vertices, the existing algorithms are almost using angles between two adjacent lines and W-junction and Y- junction＇s definitions, and other complex methods. This passage gives four methods with their detailed mathematical inference processes in order to use these algorithms implemented by computer. The algorithms listed are Angle Summation method and Points to the Line method, Triangle methods which are the Triangle Area method and the Cross method. When the computer programs discriminate junctions, by comparison, the Angle Summation method and Points to the Line method are less efficacious than the Triangle method, and Cross method is more efficacious than the Triangle Area method in the Triangle method.
基金the National Natural Science Foundation of China (Grant No. 10073004) the Joint Laboratory of Radio Astronomy, the Chinese Academy of Sciences.
文摘A new radio spectral receiving system has been installed on the 25 m radio telescope of the Urumqi Astronomical Observatory. The back end is a surface acoustic wave chirp transform spectrometer (SAW CZT), used for the first time in radio astronomy. The calibration of the line observations has carefully been investigated for the new-type spectrometer. In order to test the feasibility of the prototype spectrometer, we observed water maser emission from a number of known Galactic sources. We describe the observed spectra of W49N, W3(OH), 2248+600 and 1909+090. We found that W49N spectrum showed high-velocity features ranging from -330 to 146 km s-1. In comparison with the spectra observed by Medicina, the feature at the LSR velocity -52 km s-1 in the W3(OH) presented the rapid variation in flux density.
