A vectrix cross-product operator identity is presented which shows thesymmetrical relationship between a column matrix and a vectrix. The kinematics ofvectrices and other commonly used relations are then easily obtain...A vectrix cross-product operator identity is presented which shows thesymmetrical relationship between a column matrix and a vectrix. The kinematics ofvectrices and other commonly used relations are then easily obtained with it. The timederivative of the transformation matrix is extended to a more general form ofexpression. The results can be used conveniently in the modeling of flight dynamics inwhich many reference frames must be used.展开更多
Orbital experimental researches on crystal growth of Mn-doped GaSb and Bi2Se0.21Te2.79 are briefly summarized.The space experiments were completed in September of 2007 on broad the Foton-M3 satellite of Russia.Ground-...Orbital experimental researches on crystal growth of Mn-doped GaSb and Bi2Se0.21Te2.79 are briefly summarized.The space experiments were completed in September of 2007 on broad the Foton-M3 satellite of Russia.Ground-based researches on the solidification behaviors of Al-Al3Ni,AlAl2Cu,Ag-Cu eutectic,Al-Pb monotectic and Cu-Co peritectic alloys in a 50-meter-high drop tube were investigated.New experimental results on the ultrasonic field and the temperature recycling induced to chiral symmetry breaking of NaClO3 crystal also were reported in the present paper.展开更多
α-LiIO_(3) single crystals were grown by the aqueous solution method in a Chinese scientific return-satellite.The morphology of the crystals grown in space are similar to that of earth-grown crystals.It is found that...α-LiIO_(3) single crystals were grown by the aqueous solution method in a Chinese scientific return-satellite.The morphology of the crystals grown in space are similar to that of earth-grown crystals.It is found that the growth rates of the positive and negative sides of the space-grown crystals are almost the same.The perfection of both crystals grown in space and on earth was examined.展开更多
KB_(5)O_(8).4H_(2)O(KB_(5))crystals have been grown in an agar-agar gel by temperature decrease method for simulating crystal growth in space.Nucleation and growth have been followed by interferometric holography.A co...KB_(5)O_(8).4H_(2)O(KB_(5))crystals have been grown in an agar-agar gel by temperature decrease method for simulating crystal growth in space.Nucleation and growth have been followed by interferometric holography.A concentration field surrounding the growing crystals was obtained and a Liesegang ring was observed.The pattern are visualized directly to reveal physical phenomena of purely diffusion crystal growth kinetics.展开更多
Many new cities and new areas in China are planning to build a Central Park.Taking New York Central Park as an example,this study analyzed the design of ecological environment,the people-oriented planning and the sust...Many new cities and new areas in China are planning to build a Central Park.Taking New York Central Park as an example,this study analyzed the design of ecological environment,the people-oriented planning and the sustainable development of it,and summarized the enlightenment to the planning of China’s Central Park.展开更多
文摘A vectrix cross-product operator identity is presented which shows thesymmetrical relationship between a column matrix and a vectrix. The kinematics ofvectrices and other commonly used relations are then easily obtained with it. The timederivative of the transformation matrix is extended to a more general form ofexpression. The results can be used conveniently in the modeling of flight dynamics inwhich many reference frames must be used.
基金Supported by the Chinese Manned Spaceflight Programs and Chinese Space Agency
文摘Orbital experimental researches on crystal growth of Mn-doped GaSb and Bi2Se0.21Te2.79 are briefly summarized.The space experiments were completed in September of 2007 on broad the Foton-M3 satellite of Russia.Ground-based researches on the solidification behaviors of Al-Al3Ni,AlAl2Cu,Ag-Cu eutectic,Al-Pb monotectic and Cu-Co peritectic alloys in a 50-meter-high drop tube were investigated.New experimental results on the ultrasonic field and the temperature recycling induced to chiral symmetry breaking of NaClO3 crystal also were reported in the present paper.
文摘α-LiIO_(3) single crystals were grown by the aqueous solution method in a Chinese scientific return-satellite.The morphology of the crystals grown in space are similar to that of earth-grown crystals.It is found that the growth rates of the positive and negative sides of the space-grown crystals are almost the same.The perfection of both crystals grown in space and on earth was examined.
文摘KB_(5)O_(8).4H_(2)O(KB_(5))crystals have been grown in an agar-agar gel by temperature decrease method for simulating crystal growth in space.Nucleation and growth have been followed by interferometric holography.A concentration field surrounding the growing crystals was obtained and a Liesegang ring was observed.The pattern are visualized directly to reveal physical phenomena of purely diffusion crystal growth kinetics.
文摘Many new cities and new areas in China are planning to build a Central Park.Taking New York Central Park as an example,this study analyzed the design of ecological environment,the people-oriented planning and the sustainable development of it,and summarized the enlightenment to the planning of China’s Central Park.