查询词典 hilbert space

Recently , the classical Riesz representation theorem on Hilbert spaces has been generalized onto complete random inner product modules ,in this paper the classical Friedrichs theorem on Hilbert spaces is generalized onto complete random inner product modules.

最近，经典的Riesz 表示定理已经被推广到完备随机内积模上，在此基础上本文将Hilbert 空间上经典的Friedrichs 定理推广到完备随机内积模上。首先，证明完备随机内积模上任一正Her2 mite 型惟一地对应一个正自共轭算子。

The Hilbert amplitude envelope of the stator current includes the low frequency of fault characteristic, thus it can reduce the signal length by resample the Hilbert amplitude envelope of the stator current by downsampling, which can avoid spectrum aliasing. Then it can reduce the computation time of the MUSIC Method for the spectrum analysis to the resampled signals for the given bandwidth. Meanwhile combining continuous subdivision Fourier transform and rotor slot harmonics based slip estimation it can in advance estimate the concrete values of the fault characteristic frequency, and then inquiry purposely the fault feature component information in the stator current spectrum in order to accomplish the broken rotor bar fault with high sensitivity and h reliability, which eliminates adverse effect of issuable false peaks to the fault detection and formed a novel scheme to detect broken rotor bar fault.

定子电流Hilbert幅值包络信号包含了低频的故障特征频率调制信号，故通过对定子电流Hilbert幅值包络信号进行降采样率重采样、减少分析信号长度，可避免低频段频谱混叠，再对减少的重采样数据进行具有超分辨率的MUSIC低频段估计，可大大降低MUSIC算法频谱估计时间；运用连续细化傅里叶变换和转子齿槽谐波转差率估计技术，可预知故障特征频率精确值，从而可有目的地查询故障分量，消除MUSIC虚假波峰对故障检测混淆的影响，大大提高了故障检测的灵敏度和可靠性，以此形成异步电动机转子断条故障检测新方法。

This paper introduces eight methods of tlme-frequency analysis, such as Hilbert transform, Hilbert-Huang transform, sine curve fitting, Ricker wavelet matching, short time Fourier transform, wavelet transform, S transform and Cohen methods, This paper explains the merits and defects of those methods from the time resolution, frequency resolution and the adaptive ability of multi-frequency signals.

本文介绍了Hilbert变换、Hilbert—Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen娄这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

This paper introduces eight methods of time-frequency analysis,such as Hilbert transform,Hilbert-Huang transform, sine curve fitting ,Ricker wavelet matching,short time Fourier transform,wavelet .

本文介绍了Hilbert变换、Hilbert-Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen类这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

The Hilbert modulus is defined as the sum of the square of a signal and its conjugation.Hilbert modulus is used to covert the fundamental component in original phase current to direct current component,the fault characteristics frequency of bar break is transformed into the twice slip frequency.The problem is solved that fault characteristic component in the spectrum analysis of the current is easily to be blanketed by fundamental component and is hard to highlight fault characteristics.

将Hilbert模量定义为原始信号与其共轭信号的平方和，利用Hilbert模量将原相电流中的基波分量转变为直流分量，原频谱分析的转绕组断条的故障特征分量转变为频率为二倍转差频率的电流分量，决了相电流频谱分析方法中断条故障特征成分容易被基波湮没而难以突出故障特征的问题。

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The Fifth Chapter analysises the practical example of the historied campus exterior space plan for 100-year-history universities in Shanghai. It includes the space structure, the transportation space, and the space detailed point such as space before campus, central square, space closed to water, space in the entrance of main buildings, etc.

第五章，对上海百年高校老校园建筑外部空间进行实例分析，从空间结构入手，分析校园交通空间，进而展开对各主要空间节点的研究，包括：校前空间、中心广场、亲水空间和重点建筑入口空间等等。

Dahlquist,Butcher,Burrage and Frank et.al.established early or late B-theory of Runge-Kutta methodsfor stiff problems in Euclidean space with finite dimensions.Afterward,Shoufu Li et.al.extended this theory to general linear methods and stiff problems in Hilbert space andfurther established B-theory of general multivalue methods in Banach space.

Dahlquist、Butcher、Burrage及Frank等人先后建立了有限维空间中刚性问题Runge-Kutta方法的B-理论；李寿佛等人将该理论推广到一般多值方法和Hilbert空间中的刚性问题，进而建立了Banach空间中刚性问题一般多值方法的B-理论。

The relationship between the two kinds of structure is the important pledge of healthy, comfortable and sustainable humanistic objective for urban enviroment. In allusion to the problem urgent to solve in recent creation, the article summarizes the humanistic design concept and strategy for serried region of high-rise building, from the analysis of the building noumenon, space, interior and exterior enviroment in urban"serried-core". The strategies are form creation strategies which cultivate formal individuality in the relationship with urban enviroment, and conform urban context in the relationship with restrictive factors; space creation strategies which creat humanistic space and site by attempering architectural space and urban space, and call for humanistic scalc and inspirit by the combination of architectural space and urban function; enviroment creation stategies which create sustainable physical enviroment based on steady urban zoology, and construct poetic humanistic enviroment during the course of compound urbar enviroment.

针对目前创作中亟待解决的问题，着重从城市"簇群核"的形式、空间、环境及其主要载体——高层建筑等方面深刻解析，鲜明提出了在城市大背景中高层建筑密集区的人性化创作观念和策略，论证了在与形式制约因素的关联中系统整合城市文脉、在与城市人文环境的互动中努力培育形式个性的形式创作策略；在建筑空间与城市空间的互参调度中创作人性空间和场所、在建筑空间与城市功能的有效结合中弘扬人性尺度和精神的空间创作策略；在稳定城市生态的前提下创造持续可居的物理环境、在复合城市环境的过程中营建诗意栖居的人文环境的环境创作策略。

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就在网上看啊，终于黄天不负有心人，终于被他找到了当时他认为又好又便宜的空间那就是www.vip5944.com这里，我当时也劝过他别买那里的空间，在网上有很多人在那里买过空间，都说那里的空间很垃圾，可是他不听话还是要买，朋友当时不会购买，我就勉为其难代劳了，当时我那个朋友说买两个，一个空间用来做他自己喜欢的隐私网，一个空间用来做自己喜欢的算命网。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。