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In the system,the high-speed solenoid valves are used to control the amount and timing of natural gas injection.The ECU,based on a dingle chip computer,is designed to pick up signals and control the valves.In addition,the control software is also developed.

系统采用了电控高速电磁阀实现天然气的多点喷射控制，设计了基于单片机的电控单元实现信号采集和电磁阀驱动控制，进行了系统控制软件的匹配开发。

All showed strong chlorophyll a fluorescence signals originating from the dinoflagellate endosymbionts.

均具有很强的叶绿素a荧光信号，这些信号来源于体内共生的甲藻。

This algorithm takes account of all the constraints of the control signals and their increments. It does not require solving the Diophantine equation, and needs only small computer memory. Furthermore it weakens the coupling of the variables.

该算法充分考虑了控制输入及其增量受约束的情况，而且不必求Diophantine方程，减小了计算量，且削弱了变量之间的耦合程度。

The chip of CH250 and big power triode transistors were designed to build a set of step motor driving circuits. Only two signals of the DSP CP and DIR from EVB are needed for the control of the step motor.

偏差调整单元则由DSP与步进电机驱动电源组成，该电源采用步进电机脉冲分配器CH250，配以单端驱动电路，由事件管理器模块EVB输出CP脉冲与DIR信号经过驱动电路来对步进电机进行控制。

A direction finder that gives a bearing by determining the direction of incoming radio signals.

通过观察输入无线电信号来源的方向来判定方位的测向器。

Time-Frequency parameter estimation and direction finding for nonstationary signals impinging on an antenna array over a wide frequency band (2~18GHz) is under in-vestigation, and a new method for parameter and 2-D Angle-Of-Arrival estimation of spatio-temporal undersampled LFM sources is proposed in this paper.

摘要针对宽频段(2-18GHz)内非平稳来波信号的参数估计和测向问题，提出一种时空欠采样线性调频信号参数与二维到达角联合估计方法。

At present, the wireless devices in general to bring the whole antenna, omni-directional radio antenna to the antenna axis, was "donut"-shaped radiation field; directional antenna is highly directional, in the small angle of radiation is totally outside the scope of signals ; the use of removable external antenna equipment can gain antenna, the antenna can not increase in the case of radiated power to increase communication distance.

目前的无线设备一般自带全向天线，全向天线电波以天线为轴，呈"面包圈"状向外辐射；定向天线具有极强的方向性，在小角度的辐射范围外是完全没有信号的；使用可拆卸天线的设备可以外接增益天线，可以在不增加天线辐射功率的情况下增加通讯距离。

In this system, the different characteristic and directivity of the different frequencies audio signals while propagating in the air are tested and analyzed.

利用该系统对不同频率声频信号在传输过程中的变化特征及其指向性进行了实验研究和对比分析。

This paper analyzed the process of concrete component ultrasonic testing signals applying the wavelets technology and wavelet packages technology from the discomposed effect, the avoiding noise and the composition of the signal.

基于小波函数的特点，从小波分解的效果，小波降低信噪比等方面，系统地分析小波及小波包在混凝土构件超声信号检测中的应用，利用四阶 Daubechies小波函数建立了一小波消噪模型。

We are not picking up the faint signals of discouragement, concealed anger or fear of failure.

我们没有注意气馁、掩饰的愤怒或失败的恐惧所发出的微弱信号。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。