查询词典 feedback

The core circuit adopting differential negative resistance structure with resistor feedback achieves good phase noise performance.The 2 bit switch capacitor array provides extra tuning range.The output buffer of common source structure is of decent reverse isolation.

电路核心采用带电阻反馈的差分负阻结构，因此具有良好的相位噪声性能；2bit的开关电容阵列进一步提高了电路的调谐范围；共源级输出缓冲提供了较好的反向隔离度。

The incidence area of PIN-PD is 22 22μm2, InP-based HBT is 3μm size style, the square resistance of NiCr resistance is 100, the amplifer circuit is transimpedance feedback amplifer with one stage common emitter and output buffer circuits.

探测器台面面积为，HBT采用3工艺，NiCr电阻的方阻值为100，放大电路形式采用跨阻反馈单极共射加输出缓冲电路。

A more familiar example of the use of feedback to regulate a system is the common thermostat for heating a room.

使用反馈来调节系统的一个更为普遍的例子是供暖系统中的温度计。

Action Research as a method of research for the integration of ed2ucational theory and practice is increasingly valued. Its characteristicsof practice ,cooperation,opening ,immediate feedback and compatibleness make it a good

其实践性、合作性、开放性、及时反馈性和兼容性特点决定了它较适合于没有接受过严格教育实验训练的我国中小学教师使用；符合中小学教育科研的发展战略；有

A dynamic feedback compensator synthesis method based on linear matrix inequalities and internal model control is proposed in this paper.

提出了一种基于线性矩阵不等式和内模控制的动态反馈抗饱和补偿器的设计方法。

However, if the buyer will not return, but insisted to the negative feedback, then Taobao out of consumer protection, the complainant is not a great likelihood of success.

但如果买家不再退货，而执意给差评的话，淘宝出于对消费者的保护，申诉成功的可能性并不是很大。

This kind of gyro uses twoposition force feedback balance method and complementary angle correction method to eliminate the effect of gyro constant drift to improve the precision of bearing calcuation .

介绍一种数字式寻北陀螺仪，它立足于国内现有条件，以计算罗经原理为基础，采用双位置力反馈平衡法和补角修正措施，用来消除陀螺常值漂移的影响以提高方位计算精度。

In order to eliminate the influence caused by the nonminimum phase characteristic of a common Boost DC／DC converter, Viswanathan K has proposed a novel tristate Boost DC／DC converter. For enhancing performance, the statespace averaging model of this converter was first presented in this paper. Due to the nonlinear nature in this model, an inputoutput feedback linearization technique was adopted, and a complete controllable linear system was obtained. Then a statefeedback control strategy was designed based on this linear system. Simulation results show that the proposed control strategy can assure constant output voltage in a wide range, so as to realize the stability of the system during large fluctuation of power supply and load disturbance. Good dynamic performance can also be achieved.

针对 Viswanathan K为消除普通BOOST DC／DC变换器的非最小相位特性而提出的三态Boost DC／DC变换器，为进一步提高这种电路拓扑的性能，在建立了变换器状态空间平均模型的基础上，针对其多变量、非线性特点，采用输入输出线性化将其转化为一个完全可控的线性系统，在此基础上应用现有成熟的线性控制策略进行了控制系统的设计，并且采用MATLAB进行仿真验证，结果表明：这种非线性控制策略可以确保输出电压在大范围内恒定可调，且即使存在大范围扰动(输入电压和负载变化均较大)的情况下，系统也可以确保稳定性和良好的动态性能。

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：为了减小正交频分复用系统受频率偏差的影响，在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段，文中采用变步长自适应算法来进行跟踪，这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法，不但可以利用前向纠错的方式来避免反馈，而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低，并具有较好的收敛性，能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

A new scheme to compute the state feedback matrix is developed in this paper.

本文提出了计算状态反馈矩阵的新方法。

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％。