OVERVIEW As a two-stage launch vehicle using storable liquid propellant (both stages PLFuse N2O4/UDMH), LM-2D is a member of Chinese Long March series launch vehicle. The LM-2D launch vehicle is developed by Shanghai ...OVERVIEW As a two-stage launch vehicle using storable liquid propellant (both stages PLFuse N2O4/UDMH), LM-2D is a member of Chinese Long March series launch vehicle. The LM-2D launch vehicle is developed by Shanghai Academy of Spaceflight Technology (SAST), a branch of China Aerospace Science and Technology Corporation (CASC). The LM-2D launch vehicle is mainly used to launch LEO satellites and SSO satellites. It features mature technology, high reliability, strong adaptability, and reasonable cost. As of January 2013, the LM-2D launch vehicle has conducted 18 launches placing 23 satellites into expect-展开更多
The LM-2D launch vehicle completed the final launch mission of 2012 by launching the Turkish GK-2 satellite in December 2012 and performed the first mission of 2013 by sending the High-resolution Satellite1,the
Long March 3C (LM-3C) ,performed its maiden flight on April 25, 2008, sending the first Chinese data relay satellite Tianlian 1 into predetermined orbit.
The expendable launch vehicle (ELV) is the major means for human beings to enter space.Up until April 2009,China's Long March (LM) series launch vehicle has conducted 117 launches,and realized 75 consecutive succe...The expendable launch vehicle (ELV) is the major means for human beings to enter space.Up until April 2009,China's Long March (LM) series launch vehicle has conducted 117 launches,and realized 75 consecutive successful launches since October 1996, which marks China's ELV development has entered a new historical era.Based on the analysis of China's LM series launch vehicle development status,combining with the new generation launch vehicle development,this raises a development prospect for China's ELV to meet the demands for future launch vehicle technology development.展开更多
The bamboo stem, when mature 5 to 6 years, serves as a building material for modest houses and its marrow as packaging purposes. One of the strains related to the uses of bamboo stem is most often the compression towa...The bamboo stem, when mature 5 to 6 years, serves as a building material for modest houses and its marrow as packaging purposes. One of the strains related to the uses of bamboo stem is most often the compression towards the axial direction. The phenomenon of damage is very often observed during such loading. The present study on raffia aims to analyze this phenomenon through cyclical stresses as usual. From the results obtained, it was observed in the stress-strain plane, that the area of <span><span><span style="font-family:;" "="">the </span></span></span><span><span><span style="font-family:;" "="">hysteresis loops and the residual strain evolve with two parameters: the number of cycles and the stress peaks. The study of energy dissipation has shown that it evolves according to an exponential law as a function of the number of cycles. The distribution of the energy rate along a stem shows that the samples from the zone close to the base store twice (0.0412 MJ/m<sup>3</sup>) more energy than the samples taken from the top of the foliage (0.019 MJ/m<sup>3</sup>).</span></span></span>展开更多
文摘OVERVIEW As a two-stage launch vehicle using storable liquid propellant (both stages PLFuse N2O4/UDMH), LM-2D is a member of Chinese Long March series launch vehicle. The LM-2D launch vehicle is developed by Shanghai Academy of Spaceflight Technology (SAST), a branch of China Aerospace Science and Technology Corporation (CASC). The LM-2D launch vehicle is mainly used to launch LEO satellites and SSO satellites. It features mature technology, high reliability, strong adaptability, and reasonable cost. As of January 2013, the LM-2D launch vehicle has conducted 18 launches placing 23 satellites into expect-
文摘The LM-2D launch vehicle completed the final launch mission of 2012 by launching the Turkish GK-2 satellite in December 2012 and performed the first mission of 2013 by sending the High-resolution Satellite1,the
文摘Long March 3C (LM-3C) ,performed its maiden flight on April 25, 2008, sending the first Chinese data relay satellite Tianlian 1 into predetermined orbit.
文摘The expendable launch vehicle (ELV) is the major means for human beings to enter space.Up until April 2009,China's Long March (LM) series launch vehicle has conducted 117 launches,and realized 75 consecutive successful launches since October 1996, which marks China's ELV development has entered a new historical era.Based on the analysis of China's LM series launch vehicle development status,combining with the new generation launch vehicle development,this raises a development prospect for China's ELV to meet the demands for future launch vehicle technology development.
文摘The bamboo stem, when mature 5 to 6 years, serves as a building material for modest houses and its marrow as packaging purposes. One of the strains related to the uses of bamboo stem is most often the compression towards the axial direction. The phenomenon of damage is very often observed during such loading. The present study on raffia aims to analyze this phenomenon through cyclical stresses as usual. From the results obtained, it was observed in the stress-strain plane, that the area of <span><span><span style="font-family:;" "="">the </span></span></span><span><span><span style="font-family:;" "="">hysteresis loops and the residual strain evolve with two parameters: the number of cycles and the stress peaks. The study of energy dissipation has shown that it evolves according to an exponential law as a function of the number of cycles. The distribution of the energy rate along a stem shows that the samples from the zone close to the base store twice (0.0412 MJ/m<sup>3</sup>) more energy than the samples taken from the top of the foliage (0.019 MJ/m<sup>3</sup>).</span></span></span>