参考系统

The simulation results show that the vector control system based on this improved scheme has better dynamic and static performance. It solves a lot of problems such as larger error in the MRAS based on the back electromotive force when the motor runs across the zero speed and the instability based on the instantaneous reactive power in the regenerating mode and has high estimating precision.

仿真表明基于该方法的矢量控制系统动静态性能好，能有效解决反电动势模型参考自适应方法在速度过零点辨识误差大以及瞬时无功功率模型参考自适应方法在转速给定为负阶跃时转速不稳定问题，转速估计精度高。

Results of this paper can be used as a reference for the study of solid-liquid two-phase flow in pipelines and for the design of power drives in the slurry transport system of a dredger.

本文的研究成果对管道固液两相流研究有一定的参考价值，并可为挖泥船泥浆输送系统动力设备的设计提供参考依据。

Furthermore, it can be developed into an erasable optical disc re...

本文在收集了国内外大量有关文献资料的基础上，系统地综合论述激光电视的基本原理，可作为精密机械及仪器专业一门选修课的参考教材，亦可供有关科研和工程技术人员参考。

The project combine the NN model consult self adapt modern intelligent control theory and current digital technology and apply this theory to follow adjust the moment of electromotor, which correspond control the moment of many electromotor. Inc a mainframe (adopt speed and current both closed loop system), seven frae electromotor (adopt NN model consult self adapt adjuster).

将神经网络模型参考自适应现代智能控制理论与当前的数字技术相结合应用于电机的力矩跟随调节，协调控制多台电机的力矩，包括：一台主机(采用速度、电流双闭环系统)，七台从机(采用神经网络模型参考自适应调节器)。

One difficulty of multiplexer implementation is how to deal with PCR in transport stream.

由于节目参考时钟是编解码器中共同系统时钟的标签，精确度要求非常严格，因此复用器研制的一个难点就是节目参考时钟的处理。

The system controls a tunable fiber Fabry-Perot filter with sawtooth wave voltage and synchronous signal of its digital phase to interrogate FBG sensors in a single fiber. Meantime, a reference FBG and a digital thermometer provide an accurate reference wavelength, which is used to calibrate the wavelength readout of the TFFP in real-time by a digital signal processor.

解调系统利用锯齿波电压信号和数字相位同步信号控制可调谐光纤法布里珀罗滤波器，对光纤光栅传感器阵列进行扫描式寻址，同时采用非测量环境中的参考光栅和数字温度计提供精确的参考波长，并由高速数字信号处理器实时校准滤波器的波长读取值，很好地消除了滤波器调谐的温度漂移、非线性和蠕动性引起的测量误差。

To select the target word of these verbs in these sentences via SFCM method, MT selecting approach and testee selecting approach seperatively, and to contrast their selecting results with the keys, we may get the match degree to the keys: SFCM method is 92.7%, which is much better than MT approach (52.3%), and better than testee approach (88.06%) too.

分别通过语义特征组合模式、机器翻译系统和人工选择三种方法选择每句原文中动词的恰当义项，将这三种形式的译词选择结果分别与参考译文中的译词进行比较，得到每种形式与参考译文译词的吻合度。

With the objective of the robot′s steady movement, the trajectory is sampled equably and each segment is considered as uniformly variable motion. To guarantee tracking precision, the relation between the tracking control error and the output torque of the controller is analyzed from the point of engineering.

而按照通常的规划算法所规划出的"最优"参考轨迹在实际中却难以应用，因为这一参考轨迹是基于机器人的精确动力学模型得到的，没有考虑实际系统中存在的模型不确定性，也未考虑控制器的动态特性，因而跟踪精度得不到保证。

The author firstly introduces the function and capability of the Wide-Screen Display System, and the application or development of this system in the police commanding center.

然后，作者通过对大屏幕显示系统的硬件系统进行剖析，阐述大屏幕显示系统的原理，提出几种显示模式，为解决我校在进行警务实战训练和汇报表演时出现的大屏幕显示系统常见问题提供参考依据。

The method of obtaining time delay parameters with the reverse access channel is discussed. The modified algorithms of classic correlation methods of TOA estimation are proposed. Noncoherently combining algorithm and group coherent combining algorithm are given. They decrease the computational complexity and are more suitable for implementations in practical systems. The leading edge detection algorithm is proposed to mitigate the effect of multipath in TOA estimation. Then the secondary search method is proposed, it can solve the matching issue of PN code in CDMA systems. The location algorithms based on LS are discussed; include circular trilateration with LS, hyperbolic trilateration with reference differencing, hyperbolic trilateration with sequential differencing and circular trilateration with TOA differences. The design and implementation of wireless location system based on TOA/TDOA in CDMA2000 systems are given. The location process is discussed, and the hardware and software implementation of TOA estimation are given. Finally, the wireless location system which uses TOA estimation and LS location algorithms above is tested in the real environment.

文中讨论了采用CDMA2000反向链路中的接入信道来获取时延的方法和过程；对TOA估计的传统的相关法进行了改进，提出了非相干合并相关法和分组合并相关法，减少了基于相关的时延估计算法的运算量，提高了算法的实用性，对算法进行了仿真和性能分析；采用边缘检测技术有效减少了TOA参数估计中的多径干扰，提高了时延参数估计的准确度；提出了一种TOA估计的二次搜索法，解决了多个定位测量单元同时进行TOA估计的PN码匹配问题，进一步了提高TOA估计的精度；在采用时延值的定位算法中引入了基于LS的圆周法、基于参考差的双曲线法、基于相邻差的双曲线法和基于TDOA的圆周法，讨论了各算法的应用条件，进行了算法性能的仿真分析；给出了CDMA2000系统中的TOA/TDOA的无线定位的系统方案和实现流程，并对TOA值估计算法进行了软硬件实现，还对采用TOA估计算法、LS定位算法和定位系统设计方案实现的定位系统的进行了现场定位性能测试。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。