Three levels of N fertilizer were prepared:0(no nitrogen), 150(low nitrogen)and 300 mg N·kg-1(high nitrogen), and four growth stages of wheat plant were chosen for pulse-labeling with exposure to 13CO2 in 6-hour for each.
通过盆栽试验,研究了不同施氮0、150和300mgN·kg-1水平下,冬小麦光合产物的分配和根系碳淀积量,分别在苗期、拔节期、花期和灌浆期用13CO2脉冲标记6h,标记6h后和生育期结束后破坏性取样,测定冬小麦地上部、根、土壤和土壤呼吸中的13C含量。
4 times of(()~(13)C) pulse-labelling were used to estimate the photosynthesized carbon distribution at different development stages(seedling,elongation,heading and grain-filling) in maize-soil system,and quantify the carbon inputs into each part of belowground in whole growth season.
应用4次13C脉冲标记对不同生育时期(苗期、拔节、抽雄和灌浆期)玉米光合碳在玉米-土壤系统中的分配特征进行了为期1个生长季的研究。
In teletypewriter applications, the uniform shifting of the beginning of all marking pulses from their proper positions in relation to the beginning of the start pulse.
在电传打字机应用中，所有标记脉冲首部从它们的正常位置相对于启动脉冲首部的均匀位移。
timing pulse generator
定时脉冲发生器时标脉冲发生器
PBIP (Pulse Beacon Impact Predictor)
脉冲信标弹着预测器
counter ,electronic impulse (scalers)
电子脉冲计数器（定标器）
external burst flag
外接色同步标志脉冲，外接色同步旗形脉冲
pulse frequency modulation magnetic tape record type strong-motion instrument
脉冲调频式磁带记录强震仪
pulse duration modulation magnetic tape record type strong-motion instrument
脉冲调宽式磁带记录强震仪
DPOIR (Dial Pulse Originating Incoming Register)
拨号脉冲原始入局记录器
pulse Doppler air target tracking radar
脉冲多普勒空中目标跟踪雷达
Study of Monopulse Radar Target Three Dimensional Imaging and Recognition;
单脉冲雷达目标三维成像与识别研究
The Detection and Discrimination for Multiple Unresolved Targets with Monopulse Radar
单脉冲雷达的多目标检测与分辨技术
Multi-period pulses ranging method based on vernier interpolation principle
基于游标内插原理的多脉冲测距方法
Electrical Pulses Timing of X-ray Framing Cameras
X射线分幅相机电脉冲时标方法研究
3\^Artery perfusion was used to mark the cadaver arteries;
用动脉灌注的方法对材料的动脉血管进行标记 ;
a block or die used to imprint a mark or design.
用来留下标记或图案的印版或冲模。
compiler limit : token overflowed internal buffer
编译器限制:标记已溢出内部缓冲区
To mark or decorate with veins.
用脉络或纹理标记或装饰
Recording of three dimensional spectrum of ultrasonicpulsed Doppler flow with micro-processor
用微机描记超声脉冲多普勒血流频谱三维图