duration n. 1.持久,持续。 2.持续时间,存在时间;期间。 a disease of long duration 长时间的疾病。 holidays of three weeks' duration 三周的假期。 the duration of flight 【航空】续航时间。 a duration record 【航空】续航记录。 the duration of insurance [prescription] 保险[有效]期间。 the duration of day 日照长度。 the duration of life 生存期间。 of long [short] duration 长[短]期的。 for the D- 〔俚语〕战争未结束期间〔尤指第二次世界大战〕 (No vacations for the duration. 战时一切假期取消)。 adj. -al
signal n. 1.信号,暗号;信号器。 2.动机,导火线 (for)。 3.预兆,征象。 call signal 【无线电】呼号。 an alarm signal 警报(器)。 an information signal 〔美国〕暴风警报(旗)。 an international code of signals 国际通用信号。 a signal of distress =a distress signal 船只失事信号。 adj. 1.暗号的,作信号用的。 2.显著的,非常的,优越的。 a signal victory [defeat] 大胜[败]。 vt.,vi. (〔英国〕 -ll-) 发信号[警报]给(人、船等);用信号[警报]通知(暴风、危险等);用动作[手势]示意;预示。 a signaling bomb 信号弹。
The effects of the variations of the initial signal proteins concentrations on the output of this system are also studied . the study demonstrates that the jak - stat signaling pathway is robust with respect to its signal time and signal duration , but sensitive with respect to its signal amplitude 我们主要考察了细胞信号转导过程中三个重要的特征量的变化,即“信号时间” signal time “信号持续时间” signal duration以及信号幅度signal amplitude 。
These parameters include bandwidth , carrier frequency , signal duration and signal repeat frequency . according to the parameters , we select the method direct reading the stored digital waveform to realize the waveform generation in the third part , the waveform generator system control including communication control , timing control and address generation is designed 第二部分研究了线性调频信号参数间的内在联系,包括信号带宽、中心频率、持续时间及重复频率等,设计了信号参数,并在前人研究的基础上选择了波形存储直读法作为信号产生方案。
In the first part , the fundamentals of lfm signals are introduced . the relationship between distance resolution and bandwidth , speed resolution and signal duration are the emphases to be discussed . it indicates the importance of using lfm signals with large duration and bandwidth in uwb - sar system 全文分以下四部分:第一部分讨论了线性调频信号的基本理论,指出了距离分辨率和速度分辨率与信号时宽和带宽的关系,说明了在雷达系统中采用大时带宽线性调频信号源的必要性。