- 渡越时间
- 飞弹炮弹飞行时间
- 时间流逝法
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time of flight中文什么意思
例句与用法
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- Isobaric identification with gf - tof method is based on the different time of flight caused by the different energy loss . the resolution of gf - tof is mainly affected by two factors . first , the rises time of current pulse from start and stop detector
Gf - tof方法对同量异位素的分辨取决于e的不同而产生的时间不同，时间分辨仅来源于定时探测器电流脉冲上升时间的快慢和离子在气体介质中的能量离散。 - Green " s theorem is employed to find the quantity relationship among the constraints of heating rate , dynamic pressure and lift in reentry flight . the paper deduced the approximate solution of the optimal aeroassisted coplanar trajectories under the three typical constraints . the performance index to be minimized are either heat input , the total dynamic pressure , time during the atmospheric flight , the time integral of the square of the path inclination ; or maximize the time of flight during the atmospheric portion of the trajetory . an important conclusion is firstly obtained : under the three constraints above , the optimal aeroassisted coplanar transfers with the first forth kinds payoffs have the same optimal control laws
采用格林函数法，给出了同一平面气动力辅助变轨飞行的3种过程约束(气动加热率、动压、升力约束)条件之间关系的近似定量描述形成的飞行包络线.由此求解了航天器同时受3种约束条件时，各种性能指标下的同一平面气动力辅助变轨轨迹的近似解及相应的最优控制规律.文中对近似解与控制规律的内部结构作了细致的分析，得到了一些有益的结论 - Methods and results : proteomics approaches involve three critical techniques : two dimensional electrophoresis , biological mass spectrometry and bioinformatics . in 2 - de , we applied traditional ief in the first dimension and tris - tricine system in the second dimension and acquired protein profiles of serum and skin samples . in the identification of 10 proteins of serum and 16 proteins of skin , we acquired peptide mass of fingerprint ( pmf ) maps for all targets by means of matrix - assisted laser desorption - ionization time of flight mass spectrometry ( maldi - tof - ms ) and partial aminio acid sequences for 9 proteins by means of electrospray ionization ms / ms ( lisi - ms / ms )
研究方法：采用双向电泳技术获取泥鳅创伤前后血清和皮肤的小分子蛋白图谱，利用基质辅助激光解析飞行时间检测质谱分析( matrix - assistedlaserdesorption - ionizationtimeofflightmassspectrometry , maldi - tof - ms )和电喷雾离子化串连质谱分析( electrosprayionizationms / ms , esi - ms hs )分别获得差异蛋白点的肽指纹图谱( peptidemassoffingerprint , pmf )和部分序列信息，通过互联网上的expasy服务器中和ncbi的相关软件将这些信息和swissprot数据库进行匹配鉴定蛋白质种类。
百科释义
Time of flight (TOF) describes a variety of methods that measure the time that it takes for an object, particle or acoustic, electromagnetic or other wave to travel a distance through a medium. This measurement can be used for a time standard (such as an atomic fountain), as a way to measure velocity or path length through a given medium, or as a way to learn about the particle or medium (such as composition or flow rate).
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