A Chinese satellite gravity mission called SAGM (Space Advanced Gravity Measurements) is now taken into consideration.To meet its designed requirement,the measurement precision of the laser ranging system used to meas...A Chinese satellite gravity mission called SAGM (Space Advanced Gravity Measurements) is now taken into consideration.To meet its designed requirement,the measurement precision of the laser ranging system used to measure the inter-satellite distance change has to be better than l00nm/Hz1/2 within a broad bandwidth from 0.1mHz to 1Hz.An equal arm heterodyne Mach-Zehnder interferometer has been built on ground to demonstrate the measurement principle of a laser ranging system,which potentially can be used for both SAGM and future GW (gravitational wave) space antennas.Because of the equal arm length,the laser frequency noise has been significantly suppressed in the interferometer.Thus,the sensitivity better than 1nm/Hz1/2 in a frequency range of 0.15 mHz-0.375 Hz has been achieved.The result shows that the proposed methodology has very promising feasibility to meet the requirements of SAGM and of GW space antennas as well.展开更多
The electronic structure of fcc Fe/Cu{111}interface has been studied by angle-resolved photoemission with synchrotron radiation.The existence of the interface state and absence of intermixture between Fe and Cu atoms ...The electronic structure of fcc Fe/Cu{111}interface has been studied by angle-resolved photoemission with synchrotron radiation.The existence of the interface state and absence of intermixture between Fe and Cu atoms in the Fe/Cu{111}interface show that the Fe/Cu{111}system has an abrupt and ordered interface.展开更多
Electronic structure of Cu{111}surface dongΓ-K line of surface Brillouin zone(SBZ)was studied using synchrotron radiation angle-resolved photoemission.A surface state located at 3.0eV below Fermi level,near K point o...Electronic structure of Cu{111}surface dongΓ-K line of surface Brillouin zone(SBZ)was studied using synchrotron radiation angle-resolved photoemission.A surface state located at 3.0eV below Fermi level,near K point of SBZ was observed for the first time.It is described by localized d-electron Tamm surface state.展开更多
In the face of an aging population and rapid development trend, the elderly of the whole society how pension, who for their retirement, how to better spend their remaining years, has become a priority for the governme...In the face of an aging population and rapid development trend, the elderly of the whole society how pension, who for their retirement, how to better spend their remaining years, has become a priority for the government and the public at all levels of an important issue. This article is in remote interactive pension model as an attempt of their development status, pension model and the bottleneck Solutions made systematically expounded and were examining remote interactive mode of operation of pension from the pension agency, the elderly consumer groups, such as different angles. And on this basis, to find places to interact with the pension model to the nationwide promotion of bottlenecks and problems, and make corrective recommendations.展开更多
基金Supported by the Space Science Research Projects in Advance,Chinese Academy of Sciences.
文摘A Chinese satellite gravity mission called SAGM (Space Advanced Gravity Measurements) is now taken into consideration.To meet its designed requirement,the measurement precision of the laser ranging system used to measure the inter-satellite distance change has to be better than l00nm/Hz1/2 within a broad bandwidth from 0.1mHz to 1Hz.An equal arm heterodyne Mach-Zehnder interferometer has been built on ground to demonstrate the measurement principle of a laser ranging system,which potentially can be used for both SAGM and future GW (gravitational wave) space antennas.Because of the equal arm length,the laser frequency noise has been significantly suppressed in the interferometer.Thus,the sensitivity better than 1nm/Hz1/2 in a frequency range of 0.15 mHz-0.375 Hz has been achieved.The result shows that the proposed methodology has very promising feasibility to meet the requirements of SAGM and of GW space antennas as well.
基金Supported by the Chinese Academy of Sciences under No.KJ951-A1-401Doctoral Program Foundation from the State Education Committee。
文摘The electronic structure of fcc Fe/Cu{111}interface has been studied by angle-resolved photoemission with synchrotron radiation.The existence of the interface state and absence of intermixture between Fe and Cu atoms in the Fe/Cu{111}interface show that the Fe/Cu{111}system has an abrupt and ordered interface.
基金Supported by the National Natural Science Foundation of China under grant No.19234010.
文摘Electronic structure of Cu{111}surface dongΓ-K line of surface Brillouin zone(SBZ)was studied using synchrotron radiation angle-resolved photoemission.A surface state located at 3.0eV below Fermi level,near K point of SBZ was observed for the first time.It is described by localized d-electron Tamm surface state.
文摘In the face of an aging population and rapid development trend, the elderly of the whole society how pension, who for their retirement, how to better spend their remaining years, has become a priority for the government and the public at all levels of an important issue. This article is in remote interactive pension model as an attempt of their development status, pension model and the bottleneck Solutions made systematically expounded and were examining remote interactive mode of operation of pension from the pension agency, the elderly consumer groups, such as different angles. And on this basis, to find places to interact with the pension model to the nationwide promotion of bottlenecks and problems, and make corrective recommendations.
