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目前充满挑战的市场环境显然已影响到投资者信心和企业上市意愿。尽管很难预计IPO活动什么时候能够复苏,但是,依然有不少公司正积极利用这段低迷时期为上市做着筹划和准备,以便市况一旦改善就可以最迅速地从中获益。 相似文献
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The influence on the level of amplified spontaneous emission (ASE) contrast resulting from the different seed pulse energies has been experimentally studied in a 10-TW-level femtosecond Ti:sapphire chirped pulse amplification laser. It is found that, with the seed pulse energy increasing, the ASE pedestal is suppressed more efficiently, and the ASE contrast is improved with a saturable tendency. The measurement of -2×10^-8 ASE contrast in the range of more than 50 ps before the main pulse is achieved in the laser. 相似文献
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在"国家队"中邮速递登陆上海证券交易所前夕,一些民营快递企业也按捺不住躁动的心,它们在低调中筹备各自的上市事宜 相似文献