The results show that the self - adaptive filter can be used to detect line spectrum , the wavelet transform and the fourier transform can be used to detect the ship noise in modulating the anisotropic noise field 结果表明：自适应滤波对于各向异性噪声场中的线谱检测有良好的效果；而小波变换和短时傅里叶变换对各向异性噪声场中的舰船噪声调制信号检测有良好的效果。
Since the spectrum of the helicopter noise contains wide band continuous component and narrow band line component , we can use the wide band signal detection method or narrow band signal detection method . both detection methods are discussed 直升机噪声既含有宽带连续谱成分，又有很强的窄带线谱分量。根据直升机噪声的特点，我们既可以采用宽带能量检测，又可以采用窄带线谱来检测直升机信号。
A b - p neural network classifier is designed to the classification of three types of ship by using the feature vectors . the average correct recognition rate of three types ship reaches to 80 % . the result show that the above techniques based on hos are valid 将上述方法所提取的线谱和连续谱特征作为特征参量，采用b - p神经网络对三类船舶实际噪声样本进行识别分类，平均正确识别率达到80 。
Three optimization methods are presented by researching the algebraic codebook excitation linear prediction ( acelp ) algorithm , and optimized the feel weighted filter , the search algorithm of the linear spectrum pair ( lsp ) , and the search method of the algebraic codebook respectively 通过研究tetra数字集群通信系统中的acelp语音编解码算法,分别在感觉加权滤波器的设计、线谱对参数量化的搜索方式、代数码本的搜索方式等三个方面提出了优化算法。
The environment , eg . the cultural distance , the econimic system defference , sectoral structure , and the resourse of enterprise , eg . the capital , technology , knowledge of enterprise are all has great effect on the organizational mode of the joint ventures 新制度经济学的开山大师科斯提出了企业与市场两分法,将企业组织的研究深入到企业内部,从此企业组织形式的研究成为经济学的热点问题之一,随后交易成本理论和产权经济学理论等提出了企业组织线谱。
The main research contents of the physical design include : presenting the domestic and international status of space weather and expanding on the need and the importance about the space weather forecast ; sorting the disastrous space weather and discussing their effects and adapted prediction methods ; analyzing the solar disturbing resources of space weather and the precursor or concomitant phenomena of solar eruption based on the newest observational results ; probing into the radiation principle of solar short - wave ray and presenting the computing methods about solar continuum and line spectrum radiation ; extrapolating physical methods of reconstructing the temperature and the emission measure of coronal plasma ; argumenting the effective observing spectrum for space weather empirical forecast and space weather numerical forecast 物理设计的主要研究内容包括：分析目前国内国际空间天气预报的发展现状及开展空间天气预报的必要性和重要性；分类讨论了灾害性空间天气的种类、影响及目前国际上的预报方法：分析了空间天气太阳扰动源及扰动源爆发的先兆现象或者伴生现象；讨论了太阳短波辐射线谱和连续谱辐射强度的计算方法：推导了利用望远镜多波段的观测结果反演日冕等离子体温度、发射量等参数的物理方法：论证了开展空间天气经验预报和发展数值预报有效的成像谱段。
Experiments show that , when use msp430f149 audio sensor to identify vehicles that contain plane , tank , truck and so on by time domain features and two - level f - ratio , the recognition rate is 82 . 1 % ; when use both msp430f149 audio sensor and arm9 sensor to identify vehicles , and the recognition rate is much better than the original system and msp430f149 audio sensor . line spectrum of power spectra and 3 / 2 spectrum is used as frequency features on arm9 sensor , and it is caught by narrow - band bandpass filter 实验证明,在主频为8mhz的msp430f149感知器上,采用基于时域特征和二阶f比的识别算法,能够实时地完成对飞机、坦克、卡车等交通工具的识别;将msp430f149感知器与基于arm9的高端感知器配合使用,且高端感知器采用功率谱线谱或3 / 2维谱线谱作为频域识别特征,能够实时的对各类交通工具做更高性能的识别。
Furthermore , the use of adaptive filters provides new signal - processing capabilities that would not be possible otherwise . first the thesis discusses adaptive signal processing ' s basic theory , on the basis of it , introduce an adaptive filter - adaptive linear enhancer ( ale ) that is most often used now , and its several improvement : adaptive linear enhancer that has coherent accumulator two input adaptive linear enhancer and fast adaptive linear enhancer 本文首先讨论了自适应信号处理的基本原理，在此基础上介绍了一种目前最常用的自适应滤波器? ?自适应线谱增强器( ale ) ，以及它的几种改进形式：带有自相干累加器( ca )的自适应线谱增强器、双输入端自适应线谱增强器以及快速收敛自适应线谱增强器，讨论了它们的主要性能和应用的范围。
Through the inspecting , the author selected three methods of eradiate noise ' s feature extraction . the methods include the pedigree , e - filter , fractal . in those methods , the pedigree is based on frequency field , the e - filter is based on the energy field and the fractal is based on time field 本文作者经过考察，采用了三种前期研究中较为有效的水下目标特征提取方法? ?基于功率谱估计的线谱特征提取方法、基于小波分析的不同频段内能量特征提取方法和基于水声信号分维特性的特征提取方法。
The convergences of these algorithms are proved in theory . their output signal - to - noise ( snr ) is derived and bigger than that of the traditional adaptive line enhancer ( ale ) . simulation with the torpedo - radiated data indicates that the proposed algorithms are much better than the ale and the short - time correlation based adaptive line enhancer ( scbale ) in suppressing gaussian noise and enhancing spectrum feature 对该算法的收敛性能进行了严格的证明，推导了该算法输出信噪比的计算公式，证明了该信噪比总是大于基于lms的自适应线谱增强器的输出信噪比，定义了评价算法性能的若干参数。
