Aimed at the properties of the absorption and the scattering of photons in the water, the process of simulating by Monte Carlo method is analyzed. According to the slope distribution of wavy surface of water, the dist...Aimed at the properties of the absorption and the scattering of photons in the water, the process of simulating by Monte Carlo method is analyzed. According to the slope distribution of wavy surface of water, the distribution field of underwater laser is simulated, and some conclusions about the distribution field of laser through wavy surface in two different conditions are obtained. The characteristics of the distribution of laser in the seawater at the same depth with different water qualities and in the seawater at different depths with the same water quality are computed. The results are significant to the design of airborne oceanic lidar.展开更多
The La0.85Sr0.015MnO3/Fe heterostructure deposited on Si （100） substrate was prepared by the magnetron sputtering. The laser-induced voltage in the sample and the difference in the voltage signals between the curre...The La0.85Sr0.015MnO3/Fe heterostructure deposited on Si （100） substrate was prepared by the magnetron sputtering. The laser-induced voltage in the sample and the difference in the voltage signals between the current-in-plane geometry and current-perpendicular-to-plane geometry at 77 K were investigated. This difference can be attributed to the different transport mechanisms.展开更多
The transport properties in the La2/3（Ca（1-x）Sr（x））1/3MnO3 （x=0.1/3, 2/3） films prepared using the RF magnetron sputtering method were investigated, The effect of the Ca, Sr double-doping at the A position in ...The transport properties in the La2/3（Ca（1-x）Sr（x））1/3MnO3 （x=0.1/3, 2/3） films prepared using the RF magnetron sputtering method were investigated, The effect of the Ca, Sr double-doping at the A position in the La（2/3）A（1/3）MnO3 on the structure of the targets and transport of the films has been studied. With the increase of x, the structures of the targets transform from the rhombohedral phase to the cubic phase; the metal-insulator phase transition temperature （Tp） of the films increases; and the corresponding peak resistivity decreases. All the phenomena can be qualitatively explained by the lattice effect.展开更多
Based on the calculation formulas of heat treatment temperature field for an arbitrary incident laser intensity distribution, the transformation intensity distribution of CO2 laser beam passing an integrating mirror i...Based on the calculation formulas of heat treatment temperature field for an arbitrary incident laser intensity distribution, the transformation intensity distribution of CO2 laser beam passing an integrating mirror is studied theoretically and experimentally. The derived formulas are applied in laser heat treatment research which is transformed by optical system, and the theoretical calculation results are compared with experimental results. It is shown that the formulas can be used to calculate the laser heat treatment temperature field accurately, and the calculation speed is obviously faster than the numerical calculation methods with the same precision. The calculation software can be used to select proper experiment parameters.展开更多
The performance of the algorithm of the data channel scheduling algorithm of latest available unscheduled channel with void filling (LAUC-VF) under bursty traffic is presented firstly. A bursty traffic model for optic...The performance of the algorithm of the data channel scheduling algorithm of latest available unscheduled channel with void filling (LAUC-VF) under bursty traffic is presented firstly. A bursty traffic model for optical burst switch performance simulation is also introduced.展开更多
In this paper, we proposed a novel optical switching method based on optical burst switching (OBS), we call it variable time-period optical switching (VTPOS). It can both support circuit services and other immerged pa...In this paper, we proposed a novel optical switching method based on optical burst switching (OBS), we call it variable time-period optical switching (VTPOS). It can both support circuit services and other immerged packet services. It has better usability of bandwidth, shorter offset and latency time than others of unidirectional transport signaling mechanisms for OBS. It supports deflection switching for improve blocking performance without the need of schedule buffer. It introduces a time pointer and phase indicator that made synchronous more precisely and requires less guard time, it also classifies the different services classes with a relative QoS model.展开更多
文摘Aimed at the properties of the absorption and the scattering of photons in the water, the process of simulating by Monte Carlo method is analyzed. According to the slope distribution of wavy surface of water, the distribution field of underwater laser is simulated, and some conclusions about the distribution field of laser through wavy surface in two different conditions are obtained. The characteristics of the distribution of laser in the seawater at the same depth with different water qualities and in the seawater at different depths with the same water quality are computed. The results are significant to the design of airborne oceanic lidar.
基金The authors are thankful to the National Natural Science Foundation of China （Grant No. 50331040）NWPU Doctor Foundation for supporting this work.
文摘The La0.85Sr0.015MnO3/Fe heterostructure deposited on Si （100） substrate was prepared by the magnetron sputtering. The laser-induced voltage in the sample and the difference in the voltage signals between the current-in-plane geometry and current-perpendicular-to-plane geometry at 77 K were investigated. This difference can be attributed to the different transport mechanisms.
基金supported by the National Natural Science Foundation of China(No.50331040)the National Natural Science Foundation of Shaanxi Provice(No.2001C21)NWPU Doctor Foundation(cx200323)
文摘The transport properties in the La2/3（Ca（1-x）Sr（x））1/3MnO3 （x=0.1/3, 2/3） films prepared using the RF magnetron sputtering method were investigated, The effect of the Ca, Sr double-doping at the A position in the La（2/3）A（1/3）MnO3 on the structure of the targets and transport of the films has been studied. With the increase of x, the structures of the targets transform from the rhombohedral phase to the cubic phase; the metal-insulator phase transition temperature （Tp） of the films increases; and the corresponding peak resistivity decreases. All the phenomena can be qualitatively explained by the lattice effect.
基金This work was supported by the National Natural Science Foundation of China (No. 60178004) the Natural Science Foundation of Yunnan Province (No. 2000F0042M)
文摘Based on the calculation formulas of heat treatment temperature field for an arbitrary incident laser intensity distribution, the transformation intensity distribution of CO2 laser beam passing an integrating mirror is studied theoretically and experimentally. The derived formulas are applied in laser heat treatment research which is transformed by optical system, and the theoretical calculation results are compared with experimental results. It is shown that the formulas can be used to calculate the laser heat treatment temperature field accurately, and the calculation speed is obviously faster than the numerical calculation methods with the same precision. The calculation software can be used to select proper experiment parameters.
文摘The performance of the algorithm of the data channel scheduling algorithm of latest available unscheduled channel with void filling (LAUC-VF) under bursty traffic is presented firstly. A bursty traffic model for optical burst switch performance simulation is also introduced.
文摘In this paper, we proposed a novel optical switching method based on optical burst switching (OBS), we call it variable time-period optical switching (VTPOS). It can both support circuit services and other immerged packet services. It has better usability of bandwidth, shorter offset and latency time than others of unidirectional transport signaling mechanisms for OBS. It supports deflection switching for improve blocking performance without the need of schedule buffer. It introduces a time pointer and phase indicator that made synchronous more precisely and requires less guard time, it also classifies the different services classes with a relative QoS model.
