长信号

This thesis discusses mainly the hardware design and development of a simulator for airborn phase array radar. The long period of the simulator is implemented by SDRAM MODULES used in Personal Computer, the broadband is implemented by D/A with internal double-data-channel switching architecture, and the control is implemented by a single CPLD.

本文主要探讨了一种机载相控阵雷达回波模拟器的硬件设计和工程实现，采用了PC机内存常用的超大容量高速缓存SDRAM MODULES来实现输出信号的长周期，采用内部具有双路数据分时切换结构的D/A实现输出信号的宽带，采用一片CPLD完成整个系统的时序逻辑控制。

Provides alarm circuity and boosts signals picked up by the receive coils by 20dB before the 12.2m (40') cable run back to the power pack.

提供报警电路，并在12.2 米长导线将信号传递到主机箱之前，将接收线圈检测到的信号提高20分贝。

A new detection of telegraphic signal in short-wave channel is presented. It is based on the discrete Gabor spectrum analysis.

针对电报用单频信号的持续时长来携带报文信息及短波信道易于受到噪声污染的特点，研究了短波电报信号的离散Gabor谱检测方法。

One hundred ninety-eight cases of ligament injury showed hypointense string thickening and marginal haziness or ware-line by MRI.

198例韧带损伤表现为韧带增厚、扭曲，韧带移行区有长T2信号和短T1信号

From the beginning, the SOS distress signal has actually consistedof a continuous sequence of three-dits/three-dahs/three-dits, all runtogether without letter spacing. In International Morse Code ,three dits form the letter S, and three dahs make the letter O, so"SOS" became an easy way to remember the correct order of the dits anddahs.

之所以制订新遇难信号为SOS，是因为当时的抗干扰技术很差，之前常用的CQD信号，由于发送码长，而且电码的符号不一致，而S与O是摩斯电码中少有的连续码而且对操作员来说较易使用。

This substance is thought to produce a magnetic susceptibility effect and consequent signal loss on long TR images.

这种物质被认为是制造了磁化并导致了长TR信号影像上信号的丢失。

For example, suppose the aliens sent a signal 10 microseconds long, but we were checking for signals only 1 microsecond long.

举个例子，我们假设外星人发送了一个长度为 10 毫秒的信号，但是我们只检测那些长 1 毫秒的信号。

The CDAS realtime telemetry and attitude determination system of meteorological satellite FY2 is a system of multifunction long life time and high reliability ,based on multiprocessor concurrent processing and multilevel faulttolerant architecture.It implements integrally realtime processing of analog telemetry including demodulation of accurate sun pulse,realtime determination of satellite's attitude,coding telemetry demodulation and realtime data processing,satelliteground loop simulation test,a...

介绍了风云二号卫星指令与数据获取站实时遥测定姿系统，该系统是一个采用多级容错、多处理器并发运行体系结构，统一实现包括精太阳脉冲解调在内的模拟遥测信号实时处理、卫星姿态实时确定、编码遥测信号解调和数据实时处理、卫星星－地回路仿真测试及系统大容量数据、图形、字符实时处理、通信、记录等多功能、长寿命、高可靠实时遥测定姿系统。

Among benign lesion,bone skinniness was sharp and more regular,with haematoma or soft tissue swell.Malignant lesion were irregular and incomplete.MRI signs of fracture site were low T1,long T2 or long T1,long T2 signals.

良性病变表现骨皮质断裂处锐利，较规则，骨折片内陷或外移，伴有血肿形成或软组织肿胀；恶性者形态不规则，残缺不全；MRI显示骨折部位短T1、长T2或长T1、长T2信号。

Typical lesions presented with equal or long T1 and long T2 signals. The macroaxis of lesion was vertical to tangent line of lateral cerebral ventricle.

末了 （1）MRI出现脑MS病灶多呈卵圆形或类圆形，畛域较明了，榜样病灶长轴与侧脑室切线笔直，病灶以等或稍长T1、长T2信号变动为主。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。