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As a traditional method, the system based on Fourier analysis and frequency spectrum analyzer can not be used to test 1/f noise timely, fast and accurately.

传统基于傅立叶分析和频谱分析仪的微弱信号检测方法无法对1/f噪声进行实时、高速、精确的测量与分析。

The lens system adopted the Reverse-Telephoto configuration which had an effective focal length of 5.5mm,an F-number of F/4 ,a field of view of 175°,and a working wavelength in the range of visible spectrum.

系统焦距为5.5mm，相对孔径为1/4，全视场角175°，光谱范围为可见光波段，采用了3组10片的反远距型结构。

The 24 pieces of costly hexagonal reflection mirrors are the core components of the most powerful spectrum survey telescope, and each of them has a 1.1 meter diagonal conjugate and 25 mm thickness. It adopts the mirror face automatically splitting joint and transforming technology which is created by Chinese and unique in the world.

24块造价昂贵的六边形反射镜，每块对角径1.1米、厚25毫米的镜面，是世界上最强大光谱巡天望远镜的核心组件，采用的是中国人开创、全球独一无二的镜面自动拼接兼具变形高难度技术。

The vibration spectrum of CaWO 4 crystal was analyzed theoretically by means of factor group method in this paper.

本文借助商群方法对CaWO4 晶体的振动谱进行了理论分析，明确地指出了红外吸收光谱和喇曼散射光谱的激活结果。

Aiming at the fade-out problem of the peak value existing in the traditional numerical filter after a sampling average, a filtering scheme based on the LabVIEW for the Infrared Spectrum measurement of the cellular water is proposed. A correlation algorithm responding to the filtering scheme is designed, and the filtering signal is analyzed in the time and frequency domain.

针对传统数字滤波在红外光谱细胞水分检测中采样点平均后各峰值削减的严重问题，提出了一种基于LabVIEW的滤波方案，设计了相应的相关算法，并对滤波信号进行时域和频域分析。

The paper focuses on the design and realization of direct frequency and false random yard and proposes the FPGA hardware design of the model based on the analysis and study of the theory of spread spectrum communication,the whole structure of the signal source and false random yard.

文中以直接频率合成和伪随机码的设计与实现为中心，对扩频通信的基本理论、信号源的总体结构、伪随机码等问题进行了深入的分析和研究，并给出了模块的FPGA硬件实现方案。

The vibration signals from a free vibrated cantilever beam are carried on Fast Fourier Transformation and spectrum analysis.

采集悬臂梁自由振动下的声发射信号，并对信号进行快速傅里叶变换和频谱分析。

This technique overcomes the problems of spectrum shifting and low precision,which exist in traditional wave-front reconstruction of CRSI based on fast Fourier transformation.

该技术解决了基于傅里叶变换法的CRSI波前重建技术中存在的频谱移中和精度不高的问题，并且只需单幅CRSI图即可重建待测波前，可用于光束波前的动态测量。

The flotation mechanism of MG reverse-floating dolomite was studied by measuring the Zeta-potential of collophanite and dolomite, Infrared Absorptions Spectra analysing the adsorption of MG onto the minerals surface, ultraviolet- visible light absorbing spectrum calculating the amount of MG which was adsorbed onto the minerals surface. These researches showed that MG was more easyly adsorded onto the surface of dolomite in feeble acidic solution because of pure dolomite charges positive as well as pure collophanite charges negative. Therefore, a lot of MG negative ions was adsorded onto dolomite, and that MG negative ions contained hydrophobic group, the hydrophobicity of dolomite was modified, the grains of dolomite were adhered to air bubble and float with them.

对白云石和胶磷矿的Zeta-电位测定、红外光谱分析MG药剂在矿物上面的吸附情况、紫外-可见吸收光谱测定矿物上MG的吸附量等，研究了MG药剂反浮选白云石的浮选作用机理，表明在弱酸性条件下，由于白云石表面荷正电而胶磷矿表面荷负电，带有羧基和羟基官能团的MG药剂更容易吸附在白云石上，使其周围吸附有大量的MG负离子，而MG负离子的另一端为烃基，这就改变了白云石的疏水性，使其矿粒容易附着于气泡上浮。

This burst waveform has benefits compared to a continuous wave emission in that the laser peak power can be very high for measuring long distances, yet the average power can be kept low for eye safety. And more, the pre-amplified optical receiver possessing temperature compensation and feedback resistance noise compensation is designed which is based on the noise spectrum density theory of silicon avalanche-photodiode.

同时根据硅雪崩光电二极管噪声谱密度理论，设计了具有温度补偿和反馈电阻噪声补偿的激光测距仪前放接收模块，详细分析了背景光，反向高压和反馈电阻对于Si-APD接收性能的影响。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"