A stable, single-longitudinal-mode, nanosecond-pulsed Nd:YAG laser with a laser-diode dual-end pumping arrangement is constructed. Injection seeding is performed successfully by utilizing a Rb Ti OPO4 crystal as the i...A stable, single-longitudinal-mode, nanosecond-pulsed Nd:YAG laser with a laser-diode dual-end pumping arrangement is constructed. Injection seeding is performed successfully by utilizing a Rb Ti OPO4 crystal as the intracavity phase modulator to change the optical length of the slave cavity based on the delay-ramp-fire technique. The laser generates 9.9 m J of pulse energy with a 16 ns pulse duration at a 400 Hz repetition rate.A near-diffraction-limit laser beam is achieved with a beam quality factor M2 of approximately 1.2. The frequency jitter is 1.5 MHz over 2 min, and the fluctuation of the output pulse power is 0.3% over 23 min.展开更多
The declining share of labor compensation in China＇s GDP has raised intense public concern. Using statistics since 1978, this research paper examines, in detail, the changing patterns of labor compensation since refo...The declining share of labor compensation in China＇s GDP has raised intense public concern. Using statistics since 1978, this research paper examines, in detail, the changing patterns of labor compensation since reform and opening- up. Following international practices. this paper has adjusted China＇s labor compensation statistics.The results show that, iu contrast to a significant drop in the share of labor competsation in GDP before making an adjustment, the adjusted share has actually remained stable for the most part after the late 1970s.There has been no discernable fall until the last several years, The real prablem in China＇s functional distribution of national income since the late 1970s has not been the declining share of labor compensation in GDP. Actually, the share has always remained consistently low.It can be characterized as beiag ＂stable at a low level on a long-term basis＂.How to increase the labor share,which is in the interest of the average worker is a major question that must be addressed in China＇s future economic development.展开更多
基金partly supported by the Natural Science Foundation of Shanghai under Grant No.12ZR1435100
文摘A stable, single-longitudinal-mode, nanosecond-pulsed Nd:YAG laser with a laser-diode dual-end pumping arrangement is constructed. Injection seeding is performed successfully by utilizing a Rb Ti OPO4 crystal as the intracavity phase modulator to change the optical length of the slave cavity based on the delay-ramp-fire technique. The laser generates 9.9 m J of pulse energy with a 16 ns pulse duration at a 400 Hz repetition rate.A near-diffraction-limit laser beam is achieved with a beam quality factor M2 of approximately 1.2. The frequency jitter is 1.5 MHz over 2 min, and the fluctuation of the output pulse power is 0.3% over 23 min.
文摘The declining share of labor compensation in China＇s GDP has raised intense public concern. Using statistics since 1978, this research paper examines, in detail, the changing patterns of labor compensation since reform and opening- up. Following international practices. this paper has adjusted China＇s labor compensation statistics.The results show that, iu contrast to a significant drop in the share of labor competsation in GDP before making an adjustment, the adjusted share has actually remained stable for the most part after the late 1970s.There has been no discernable fall until the last several years, The real prablem in China＇s functional distribution of national income since the late 1970s has not been the declining share of labor compensation in GDP. Actually, the share has always remained consistently low.It can be characterized as beiag ＂stable at a low level on a long-term basis＂.How to increase the labor share,which is in the interest of the average worker is a major question that must be addressed in China＇s future economic development.
