Great interest is being focused on the growth technique of KDP crystal,the first choice material for the fabrication of frequency converter and electro optic switcher used in the studies of inertial confinement fusion...Great interest is being focused on the growth technique of KDP crystal,the first choice material for the fabrication of frequency converter and electro optic switcher used in the studies of inertial confinement fusion (ICF).To reduce the cost of growth,scientists are endeavoring to promote the growth rate.The“point seed” method is one of rapid growth techniques recently developed by Lawrence Livermore National Laboratory.In the former technique,crystals are grown in all three directions at an averaged rate of 10 15mm/day. Impurities are regarded as one of the factors to inhibit the growth rate.It is generally accepted that high valence cationic ions,such as Fe 3+ ,Cr 3+ ,Al 3+ ,etc,are easy to be adsorbed on the prismatic faces and inhibit their growth.Some anions,especially those have ability to form strong hydra bond,such as phosphate derivatives (polyphosphate,metaphosphate,pyrophosphate,etc) have significant inhibiting effects on the growth of KDP pyramidal face.It is suggested that the H bonding is the key interaction force between the growing surface and the impurities.展开更多
网络即插即用技术,在异质特性的网络环境中构造应用变得越来越重要,针对目前几种常见的网络即插即用中间件技术,它们是Jini、Universal Plug and Play(UPnP)以及Salutation,对这几种技术的工作机制进行了详细的分析和比较,阐明了各自的...网络即插即用技术,在异质特性的网络环境中构造应用变得越来越重要,针对目前几种常见的网络即插即用中间件技术,它们是Jini、Universal Plug and Play(UPnP)以及Salutation,对这几种技术的工作机制进行了详细的分析和比较,阐明了各自的优缺点和适用范围,对每种技术涉及的相关问题进行了说明,文章最后对这几种技术的应用前景进行了展望。展开更多
Hempel Award the 22th China International Young Fashion Designers Contest(abbr.Hempel Award Contest)kicked off grandly as the opening show of Mercedes-Benz China Fashion Week Autumn/Winter 2014/2015 Collection on Marc...Hempel Award the 22th China International Young Fashion Designers Contest(abbr.Hempel Award Contest)kicked off grandly as the opening show of Mercedes-Benz China Fashion Week Autumn/Winter 2014/2015 Collection on March 25.展开更多
Frederic Franciszek Chopin never visited China during his short yet productive life. He may never have imagined his work would now be played so often and loudly 200 years after his birth in the faraway nation in the E...Frederic Franciszek Chopin never visited China during his short yet productive life. He may never have imagined his work would now be played so often and loudly 200 years after his birth in the faraway nation in the East. Interesting ties between展开更多
This February witnesses the 35th anniversary of U.S . President Richard Nixon’s icebreaking trip to China and the signing of the Shanghai Communique between the two countries.
Chinese sailors aboard Maanshan frigate fire flares to celebrate the first anniversary of the Chinese naval escort mission in the Gulf of Aden on December 26,2009.
文摘Great interest is being focused on the growth technique of KDP crystal,the first choice material for the fabrication of frequency converter and electro optic switcher used in the studies of inertial confinement fusion (ICF).To reduce the cost of growth,scientists are endeavoring to promote the growth rate.The“point seed” method is one of rapid growth techniques recently developed by Lawrence Livermore National Laboratory.In the former technique,crystals are grown in all three directions at an averaged rate of 10 15mm/day. Impurities are regarded as one of the factors to inhibit the growth rate.It is generally accepted that high valence cationic ions,such as Fe 3+ ,Cr 3+ ,Al 3+ ,etc,are easy to be adsorbed on the prismatic faces and inhibit their growth.Some anions,especially those have ability to form strong hydra bond,such as phosphate derivatives (polyphosphate,metaphosphate,pyrophosphate,etc) have significant inhibiting effects on the growth of KDP pyramidal face.It is suggested that the H bonding is the key interaction force between the growing surface and the impurities.
文摘网络即插即用技术,在异质特性的网络环境中构造应用变得越来越重要,针对目前几种常见的网络即插即用中间件技术,它们是Jini、Universal Plug and Play(UPnP)以及Salutation,对这几种技术的工作机制进行了详细的分析和比较,阐明了各自的优缺点和适用范围,对每种技术涉及的相关问题进行了说明,文章最后对这几种技术的应用前景进行了展望。
文摘Hempel Award the 22th China International Young Fashion Designers Contest(abbr.Hempel Award Contest)kicked off grandly as the opening show of Mercedes-Benz China Fashion Week Autumn/Winter 2014/2015 Collection on March 25.
文摘Frederic Franciszek Chopin never visited China during his short yet productive life. He may never have imagined his work would now be played so often and loudly 200 years after his birth in the faraway nation in the East. Interesting ties between
文摘This February witnesses the 35th anniversary of U.S . President Richard Nixon’s icebreaking trip to China and the signing of the Shanghai Communique between the two countries.
文摘Chinese sailors aboard Maanshan frigate fire flares to celebrate the first anniversary of the Chinese naval escort mission in the Gulf of Aden on December 26,2009.
