As the basis of automobile industry,auto parts are the necessary factors for sup- porting the automobile industry to develop continuously and healthily.Especially now when the independent development and innovation of...As the basis of automobile industry,auto parts are the necessary factors for sup- porting the automobile industry to develop continuously and healthily.Especially now when the independent development and innovation of automobile industry is developing vigorously展开更多
A simple laser-diode pumped acoustic-optic Q-switched fiber laser is reported by using China-made largemode-area ytterbium-doped fiber. Q-switched pulses with a beam quality factor of M^2 ≈ 2 and several hundred nano...A simple laser-diode pumped acoustic-optic Q-switched fiber laser is reported by using China-made largemode-area ytterbium-doped fiber. Q-switched pulses with a beam quality factor of M^2 ≈ 2 and several hundred nanoseconds pulse duration are achieved at the repetition rate of 1 - 50 kHz. When the repetition rate is 1 kHz, the pulse energy is 0.93 mJ with the pulse duration of 132 ns. Meanwhile, the profile of laser pulses shows some mode-locking phenomena, the mechanism of the phenomena is discussed.展开更多
Xiali 2000 is one of the NBC types that have been imported from Toyota. The car is compact with a high and broad profile, fully new to Chinese car market. Xiali 2000 is equipped with Toyota 8A engine and its maximum s...Xiali 2000 is one of the NBC types that have been imported from Toyota. The car is compact with a high and broad profile, fully new to Chinese car market. Xiali 2000 is equipped with Toyota 8A engine and its maximum speed is 170 km/ph. The emission level of the car meets the EuroⅡ. Safety options of the car cover ABS, SBS展开更多
文摘As the basis of automobile industry,auto parts are the necessary factors for sup- porting the automobile industry to develop continuously and healthily.Especially now when the independent development and innovation of automobile industry is developing vigorously
基金the National Key Basic Research Project of China.
文摘A simple laser-diode pumped acoustic-optic Q-switched fiber laser is reported by using China-made largemode-area ytterbium-doped fiber. Q-switched pulses with a beam quality factor of M^2 ≈ 2 and several hundred nanoseconds pulse duration are achieved at the repetition rate of 1 - 50 kHz. When the repetition rate is 1 kHz, the pulse energy is 0.93 mJ with the pulse duration of 132 ns. Meanwhile, the profile of laser pulses shows some mode-locking phenomena, the mechanism of the phenomena is discussed.
文摘Xiali 2000 is one of the NBC types that have been imported from Toyota. The car is compact with a high and broad profile, fully new to Chinese car market. Xiali 2000 is equipped with Toyota 8A engine and its maximum speed is 170 km/ph. The emission level of the car meets the EuroⅡ. Safety options of the car cover ABS, SBS
