期刊文献+
共找到55篇文章
< 1 2 3 >
每页显示 20 50 100
5D World-Universe Model. Multicomponent Dark Matter 被引量:4
1
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2015年第2期55-71,共17页
5D World-Universe Model (WUM) is based on the decisive role of the Medium of the World com-posed of massive particles: protons, electrons, photons, neutrinos, and Dark Matter Particles (DMP). The model forecasts the m... 5D World-Universe Model (WUM) is based on the decisive role of the Medium of the World com-posed of massive particles: protons, electrons, photons, neutrinos, and Dark Matter Particles (DMP). The model forecasts the masses of DMP, discusses the possibility of all macroobject cores consisting of DMP (galaxy clusters, galaxies, star clusters, extrasolar systems, and planets), and explains the diffuse cosmic gamma-ray background radiation as the sum of contributions of multicomponent dark matter annihilation. The signatures of DMP annihilation with expected masses of 1.3 TeV, 9.6 GeV, 70 MeV, 340 keV, and 3.7 keV, are found in spectra of the diffuse gamma-ray background and the emission of various macroobjects in the World. The correlation between different emission lines in spectra of macroobjects is connected to their structure, which depends on the composition of the cores and surrounding shells made up of DMP. Consequently, the diversity of Very High Energy (VHE) gamma-ray sources in the World has a clear explanation. 展开更多
关键词 5D World-universe model Medium of the World Dark Matter Particles CORES of Macroobjects GAMMA-RAY background Radiation PIONEER ANOMALY
下载PDF
Mathematical Overview of Hypersphere World-Universe Model 被引量:6
2
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2017年第3期415-437,共23页
The Hypersphere World-Universe Model (WUM) provides a mathematical framework that allows calculating the primary cosmological parameters of the World which are in good agreement with the most recent measurements and o... The Hypersphere World-Universe Model (WUM) provides a mathematical framework that allows calculating the primary cosmological parameters of the World which are in good agreement with the most recent measurements and observations. WUM explains the experimental data accumulated in the field of Cosmology and Astroparticle Physics over the last decades: the age of the World and critical energy density;the gravitational parameter and Hubble’s parameter;temperatures of the cosmic microwave background radiation and the peak of the far-infrared background radiation;the concentration of intergalactic plasma and time delay of Fast Radio Bursts. Additionally, the model predicts masses of dark matter particles, photons, and neutrinos;proposes new types of particle interactions (Super Weak and Extremely Weak);shows inter-connectivity of primary cosmological parameters of the World. WUM proposes to introduce a new fundamental parameter Q in the CODATA internationally recommended values. This paper is the summary of the mathematical results obtained in [1]-[4]. 展开更多
关键词 HYPERSPHERE World-universe model Primary COSMOLOGICAL Parameters Medium of the World Macroobjects Structure Gravitoelectromagnetism Dark Matter Particles Intergalactic Plasma Microwave background RADIATION FAR-INFRARED background RADIATION Fast Radio BURSTS Emergent Phenomena CODATA
下载PDF
5D World-Universe Model Space-Time-Energy 被引量:3
3
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2015年第1期25-34,共10页
5D Space-Time-Energy World-Universe Model is a unified model of the World built around the concept of Medium, composed of massive particles (protons, electrons, photons, neutrinos, and dark matter particles). The Mode... 5D Space-Time-Energy World-Universe Model is a unified model of the World built around the concept of Medium, composed of massive particles (protons, electrons, photons, neutrinos, and dark matter particles). The Model provides a mathematical framework that enables precise calculation of medium-bound physical parameters: Hubble’s parameter, intergalactic plasma parameters, temperature of microwave background radiation and the rest mass of photons. This paper aligns the World-Universe Model (WUM) with the theoretical framework developed by Prof. P. S. Wesson, albeit assigning a new physical meaning to the fifth coordinate. In the World-Universe Model, the fifth dimension is associated with the total energy of the Medium of the World, and the gravitomagnetic parameter of the Medium serves as the dimension-transposing parameter. 展开更多
关键词 5D World-universe model Space-Time-Energy Medium of the World Intergalactic Plasma Microwave background Radiation Mass VARYING PHOTONS
下载PDF
Overview of Hypersphere World-Universe Model 被引量:14
4
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2016年第4期593-632,共40页
This paper provides an overview of the Hypersphere World-Universe Model (WUM). WUM unifies and simplifies existing cosmological models and results into a single coherent picture, and proceeds to discuss the origin, ev... This paper provides an overview of the Hypersphere World-Universe Model (WUM). WUM unifies and simplifies existing cosmological models and results into a single coherent picture, and proceeds to discuss the origin, evolution, structure, ultimate fate, and primary parameters of the World. WUM explains the experimental data accumulated in the field of Cosmology and Astroparticle Physics over the last decades: the age of the world and critical energy density;the gravitational parameter and Hubble’s parameter;temperatures of the cosmic microwave background radiation and the peak of the far-infrared background radiation;gamma-ray background and cosmic neutrino background;macrostructure of the world and macroobjects structure. Additionally, the model makes predictions pertaining to masses of dark matter particles, photons, and neutrinos, proposes new types of particle interactions (Super Weak and Extremely Weak), and shows inter-connectivity of primary cosmological parameters of the world and the rise of the solar luminosity during the last 4.6 Byr. The model proposes to introduce a new fundamental parameter Q in the CODATA internationally recommended values. 展开更多
关键词 Hypersphere World-universe model Medium of the World Macroobjects Structure Gravitoelectromagnetism Dark Matter Particles Intergalactic Plasma Microwave background Radiation Far-Infrared background Radiation Gamma-Ray background Radiation Cosmic Neutrino background Q-Dependent Cosmological Parameters Emergent Phenomena Grand Unified Theory CODATA
下载PDF
Hypersphere World-Universe Model. Tribute to Classical Physics 被引量:6
5
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2018年第3期441-470,共30页
This manuscript summarizes the results of Classical Physics before Quantum Mechanics and Hypotheses proposed by classical physicists from the 17th until the beginning of 21st century. We then proceed to unify these re... This manuscript summarizes the results of Classical Physics before Quantum Mechanics and Hypotheses proposed by classical physicists from the 17th until the beginning of 21st century. We then proceed to unify these results into a single coherent picture in frames of the developed Hypersphere World-Universe Model (WUM). The Model proposes 5 types of Dark Matter particles and predicts their masses;models the origin, evolution, and structure of the World and Macroobjects;provides a mathematical framework that ties together a number of Fundamental constants and allows for direct calculation of their values. 展开更多
关键词 Classical Physics HYPERSPHERE World-universe model Medium of the World Dark Matter Particles Gravitoelectromagnetism COSMIC NEUTRINO background Macroobjects Structure Emergent Phenomena Q-Dependent COSMOLOGICAL Parameters
下载PDF
5D World-Universe Model. Gravitation 被引量:11
6
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2016年第3期328-343,共16页
5D World-Universe Model is based on the decisive role of the Medium of the World composed of massive particles: protons, electrons, photons, neutrinos, and dark matter particles. In this manuscript we discuss differen... 5D World-Universe Model is based on the decisive role of the Medium of the World composed of massive particles: protons, electrons, photons, neutrinos, and dark matter particles. In this manuscript we discuss different aspects of the gravitation: measured values of the Newtonian parameter of Gravitation and different Gravitational effects (gravitational lensing, cosmological redshift, gravitational deflection of light and gravitational refraction, proposed in the present paper). We show inter-connectivity of all cosmological parameters and provide a mathematical framework that allows direct calculation of them based on the value of the gravitational parameter. We analyze the difference between Electromagnetism and Gravitoelectromagnetism and make a conclusion about the mandatory existence of the Medium of the World. This paper aligns the World-Universe Model with the Le Sage’s theory of gravitation and makes a deduction on Gravity, Space and Time be emergent phenomena. 展开更多
关键词 5D World-universe model Newtonian Parameter of Gravitation Le Sage’s Gravity Cosmic Neutrino background Gravitoelectromagnetism Medium of the World Cosmological Parameters Emergent Phenomena
下载PDF
5D World-Universe Model. Neutrinos. The World 被引量:9
7
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2016年第1期1-18,共18页
In this manuscript we discuss mass-varying neutrinos and propose their energy density to exceed that of baryonic and dark matter. We introduce cosmic Large Grains whose mass is about Planck mass, and their temperature... In this manuscript we discuss mass-varying neutrinos and propose their energy density to exceed that of baryonic and dark matter. We introduce cosmic Large Grains whose mass is about Planck mass, and their temperature is around 29 K. Large Grains are in fact Bose-Einstein condensates of proposed dineutrinos, and are responsible for the cosmic Far-Infrared Background (FIRB) radiation. The distribution of the energy density of all components of the World (protons, electrons, photons, neutrinos, and dark matter particles) is considered. We present an overview of the World- Universe Model (WUM) and pay particular attention to the self-consistent set of time-varying values of basic parameters of the World: the age and critical energy density;Newtonian parameter of gravitation and Hubble’s parameter;temperatures of the cosmic Microwave Background radiation and the peak of the cosmic FIRB radiation;Fermi coupling parameter and coupling parameters of the proposed Super-Weak and Extremely-Weak interactions. Additionally, WUM forecasts the masses of dark matter particles, axions, and neutrinos;proposes two fundamental parameters of the World: fine-structure constant α and the quantity Q which is the dimensionless value of the fifth coordinate, and three fundamental physical units: basic unit of momentum, energy density, and energy flux density. WUM suggests that all time-dependent parameters of the World are inter- connected and in fact dependent on Q. We recommend adding the quantity Q to the list of the CODATA-recommended values. 展开更多
关键词 5D World-universe model Medium of the World Mass-Varying Neutrinos Dineutrinos Bose- Einstein Condensates Far-Infrared background Radiation Time-Varying Parameters of the World
下载PDF
World-Universe Model Predictions 被引量:2
8
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2020年第2期282-297,共16页
In 2013, World-Universe Model (WUM) proposed a principally different way to solve the problem of Newtonian Constant of Gravitation measurement precision. WUM revealed a self-consistent set of time-varying values of Pr... In 2013, World-Universe Model (WUM) proposed a principally different way to solve the problem of Newtonian Constant of Gravitation measurement precision. WUM revealed a self-consistent set of time-varying values of Primary Cosmological parameters of the World: Gravitation parameter, Hubble’s parameter, Age of the World, Temperature of the Microwave Background Radiation, and the concentration of Intergalactic plasma. Based on the inter-connectivity of these parameters, WUM solved the Missing Baryon problem and predicted the values of the following Cosmological parameters: gravitation G, concentration of Intergalactic plasma, relative energy density of protons in the Medium, and the minimum energy of photons, which were experimentally confirmed in 2015-2018. Between 2013 and 2018, the relative standard uncertainty of G measurements decreased x6. The set of values obtained by WUM was recommended for consideration in CODATA Recommended Values of the Fundamental Physical Constants 2014. 展开更多
关键词 World-universe model DIMENSIONLESS Time-Varying PARAMETER Q Gravitational PARAMETER Hubble’s PARAMETER Age of the World TEMPERATURE of Microwave background RADIATION TEMPERATURE of Far-Infrared background RADIATION Peak Medium of the World Inter-Connectivity of Primary COSMOLOGICAL Parameters Multicomponent Dark Matter Weak Interaction Intergalactic Plasma Neutrinos CODATA
下载PDF
World-Universe Model—Alternative to Big Bang Model 被引量:1
9
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2020年第1期133-158,共26页
This manuscript provides a comparison of the Hypersphere World-Universe Model (WUM) with the prevailing Big Bang Model (BBM) of the Standard Cosmology. The performed analysis of BBM shows that the Four Pillars of the ... This manuscript provides a comparison of the Hypersphere World-Universe Model (WUM) with the prevailing Big Bang Model (BBM) of the Standard Cosmology. The performed analysis of BBM shows that the Four Pillars of the Standard Cosmology are model-dependent and not strong enough to support the model. The angular momentum problem is one of the most critical problems in BBM. Standard Cosmology cannot explain how Galaxies and Extra Solar systems obtained their substantial orbital and rotational angular momenta, and why the orbital momentum of Jupiter is considerably larger than the rotational momentum of the Sun. WUM is the only cosmological model in existence that is consistent with the Law of Conservation of Angular Momentum. To be consistent with this Fundamental Law, WUM discusses in detail the Beginning of the World. The Model introduces Dark Epoch (spanning from the Beginning of the World for 0.4 billion years) when only Dark Matter Particles (DMPs) existed, and Luminous Epoch (ever since for 13.8 billion years). Big Bang discussed in Standard Cosmology is, in our view, transition from Dark Epoch to Luminous Epoch due to Rotational Fission of Overspinning Dark Matter (DM) Supercluster’s Cores. WUM envisions Matter carried from the Universe into the World from the fourth spatial dimension by DMPs. Ordinary Matter is a byproduct of DM annihilation. WUM solves a number of physical problems in contemporary Cosmology and Astrophysics through DMPs and their interactions: Angular Momentum problem in birth and subsequent evolution of Galaxies and Extrasolar systems—how do they obtain it;Fermi Bubbles—two large structures in gamma-rays and X-rays above and below Galactic center;Diversity of Gravitationally-Rounded Objects in Solar system;some problems in Solar and Geophysics [1]. WUM reveals Inter-Connectivity of Primary Cosmological Parameters and calculates their values, which are in good agreement with the latest results of their measurements. 展开更多
关键词 Big Bang model Four Pillars of Standard Cosmology ANGULAR MOMENTUM Problem Black Holes Hypersphere World-universe model Multicomponent DARK MATTER Macroobjects Structure Law of Conservation of ANGULAR MOMENTUM Medium of the World Inter-Connectivity of Primary Cosmological Parameters The Beginning of the World DARK EPOCH Rotational Fission Luminous EPOCH Macroobject Shell model DARK MATTER Core Gravitational Burst Intergalactic Plasma Microwave background Radiation Far-Infrared background Radiation Emergent Phenomena CODATA
下载PDF
Hypersphere World-Universe Model 被引量:3
10
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2021年第2期915-941,共27页
Dirac’s themes were the unity and beauty of Nature. He identified three revolutions in modern physics: Relativity, Quantum Mechanics and Cosmology. In his opinion: “<i>The new cosmology will probably turn out ... Dirac’s themes were the unity and beauty of Nature. He identified three revolutions in modern physics: Relativity, Quantum Mechanics and Cosmology. In his opinion: “<i>The new cosmology will probably turn out to be philosophically even more revolutionary than relativity or the quantum theory, perhaps looking forward to the current bonanza in cosmology, where precise observations on some of the most distant objects in the universe are shedding light on the nature of reality, on the nature of matter and on the most advanced quantum theories</i>” [Farmelo, G. (2009) The Strangest Man. The Hidden Life of Paul Dirac, Mystic of the Atom. Basic Books, Britain, 661 p]. In 1937, Paul Dirac proposed the Large Number Hypothesis and the Hypothesis of the variable gravitational “constant”;and later added the notion of continuous creation of Matter in the World. The developed Hypersphere World-Universe Model (WUM) follows these ideas, albeit introducing a different mechanism of matter creation. In this paper, we show that WUM is a natural continuation of Classical Physics and it can already serve as a basis for a New Cosmology proposed by Paul Dirac. 展开更多
关键词 Hypersphere World-universe model Law of Conservation of Angular Momentum Dark Epoch Rotational Fission Luminous Epoch Dark Matter Particles Macroobject Shell model Dark Matter Core Medium of the World Dark Matter Fermi Bubbles Galactic Wind Solar Wind Gravitational Bursts Intergalactic Plasma Macroobjects Supremacy of Matter Gravitomagnetic parameter Impedance Energy Density Gravitational Parameter Hubble’s Parameter Temperature of Microwave background Radiation Inter-Connectivity of Primary Cosmological Parameters Dark Matter Reactor
下载PDF
Hypersphere World-Universe Model: Evolution of the World 被引量:2
11
作者 Vladimir S. Netchitailo 《Journal of High Energy Physics, Gravitation and Cosmology》 2021年第2期508-530,共23页
The main objective of this paper is to discuss the Evolution of a 3D Finite World (that is a Hypersphere of a 4D Nucleus of the World) from the Beginning up to the present Epoch in frames of World-Universe Model (WUM)... The main objective of this paper is to discuss the Evolution of a 3D Finite World (that is a Hypersphere of a 4D Nucleus of the World) from the Beginning up to the present Epoch in frames of World-Universe Model (WUM). WUM is the only cosmological model in existence that is consistent with the Law of Conservation of Angular Momentum. To be consistent with this Fundamental Law, WUM introduces Dark Epoch (spanning from the Beginning of the World for 0.45 billion years) when only Dark Matter (DM) Macroobjects (MOs) existed, and Luminous Epoch (ever since for 13.77 billion years) when Luminous MOs emerged due to Rotational Fission of Overspinning DM Superclusters’ Cores and self-annihilation of Dark Matter Particles (DMPs). WUM envisions that DM is created by the Universe in the 4D Nucleus of the World. Dark Matter Particles (DMPs) carry new DM into the 3D Hypersphere World. Luminous Matter is a byproduct of DMPs self-annihilation. By analogy with 3D ball, which has two-dimensional sphere surface (that has surface energy), we can imagine that the 3D Hypersphere World has a “Surface Energy” of the 4D Nucleus. WUM solves a number of physical problems in contemporary Cosmology and Astrophysics through DMPs and their interactions: <b>Angular Momentum problem</b> in birth and subsequent evolution of Galaxies and Extrasolar systems—how do they obtain it;<b>Fermi Bubbles</b>—two large structures in gamma-rays and X-rays above and below Galactic center;<b>Missing Baryon problem</b> related to the fact that the observed amount of baryonic matter did not match theoretical predictions. WUM reveals <b>Inter-Connectivity of Primary Cosmological Parameters</b> and calculates their values, which are in good agreement with the latest results of their measurements. In 2013, WUM predicted the values of the following Cosmological parameters: gravitational, concentration of intergalactic plasma, and the minimum energy of photons, which were experimentally confirmed in 2015-2018. “<i>The Discovery of a Supermassive Compact Object at the Centre of Our Galaxy</i>” (Nobel Prize in Physics 2020) made by Prof. R. Genzel and A. Ghez is a confirmation of one of the most important predictions of WUM in 2013: “<i>Macroobjects of the World have cores made up of the discussed DM particles. Other particles, including DM and baryonic matter, form shells surrounding the cores</i>”. 展开更多
关键词 Hypersphere World-universe model Law of Conservation of Angular Momentum Dark Epoch Rotational Fission Luminous Epoch Dark Matter Particles Macroobject Shell model Dark Matter Core Medium of the World Dark Matter Fermi Bubbles Galactic Wind Solar Wind Gamma-Ray Bursts Gravitational Bursts Intergalactic Plasma Cosmological Time Solar Time Macroobjects Supremacy of Matter Gravitomagnetic Parameter Impedance Energy Density Gravitational Parameter Hubble’s Parameter Temperature of Microwave background Radiation Inter-Connectivity of Primary Cosmological Parameters Dark Matter Reactor
下载PDF
基于GMM-UBM模型的语言辨识研究 被引量:10
12
作者 屈丹 王炳锡 魏鑫 《信号处理》 CSCD 2003年第1期85-88,共4页
与说话人识别、连续语音识别相比,自动语言辨识是一个相对较新的研究,而且是一项较难的课题。本文给出了一种基于GMM-UBM模型的语言辨识系统,并利用OGI-TS电话语音库对算法的性能进行了测试,然后给出了实验结果。实验结果表明,该算法也... 与说话人识别、连续语音识别相比,自动语言辨识是一个相对较新的研究,而且是一项较难的课题。本文给出了一种基于GMM-UBM模型的语言辨识系统,并利用OGI-TS电话语音库对算法的性能进行了测试,然后给出了实验结果。实验结果表明,该算法也是进行语言辨识的一种有效方法。 展开更多
关键词 语音识别 语言辨识 GMM.ubm模型 计算机
下载PDF
基于SVM-UBM的语言辨识系统
13
作者 张文林 李弼程 屈丹 《计算机工程与应用》 CSCD 北大核心 2007年第10期41-43,共3页
支持向量机作为强大的理论和计算工具,已成功地应用在模式识别的众多领域中。研究了将支持向量机模型(SVM)应用于语言辨识的理论框架,提出了将Louradour序列核应用于语言辨识,并利用高斯混合模型(GMM)构造全局背景模型(UBM)对其进行了改... 支持向量机作为强大的理论和计算工具,已成功地应用在模式识别的众多领域中。研究了将支持向量机模型(SVM)应用于语言辨识的理论框架,提出了将Louradour序列核应用于语言辨识,并利用高斯混合模型(GMM)构造全局背景模型(UBM)对其进行了改进,从而导出了基于SVM-UBM的语言辨识系统。相关实验结果表明,该系统的识别率高于经典的高斯混合模型(GMM)和基于广义线性区分性核(GLDS)的支持向量机模型。 展开更多
关键词 语言辨识 支持向量机 序列核 高斯混合模型 全局背景模型
下载PDF
联合HMM-UBM与RVM的声纹密码识别算法 被引量:4
14
作者 胡志隆 文畅 +1 位作者 谢凯 贺建飚 《计算机工程》 CAS CSCD 北大核心 2018年第11期129-134,共6页
针对声纹密码识别中声纹文本信息利用率低和噪音干扰的问题,提出隐马尔科夫模型-通用背景模型(HMM-UBM)融合相关向量机(RVM)的声纹识别算法。利用HMM-UBM对语音信号进行时序建模,使用RVM学习得到每位注册话者语音的分类信息。通过对待... 针对声纹密码识别中声纹文本信息利用率低和噪音干扰的问题,提出隐马尔科夫模型-通用背景模型(HMM-UBM)融合相关向量机(RVM)的声纹识别算法。利用HMM-UBM对语音信号进行时序建模,使用RVM学习得到每位注册话者语音的分类信息。通过对待识别话者建立HM M模型,并将RVM作为分类器进行判决决策得到分类结果。实验结果表明,与GMM-UBM算法和GMM-SVM算法相比,在无噪声环境下,该算法错误接收概率降低7%~9%,识别正确率提高4%~5%,在低信噪比环境下,其识别正确率提高5%~12%。 展开更多
关键词 声纹识别 隐马尔科夫模型 通用背景模型 相关向量机 语音信号
下载PDF
基于UBM的发音质量评价算法 被引量:2
15
作者 李婧 黄双 张波 《计算机工程》 CAS CSCD 北大核心 2008年第22期207-209,共3页
将已经成功应用到说话人识别/确认领域中的高斯混合模型和全局背景模型(UBM)引入语音发音质量评价领域,提出一种新的评价英语发音质量的算法。该算法训练出标准发音的全局背景模型。UBM模型描述与音素无关的特征分布,定义段时长归一化... 将已经成功应用到说话人识别/确认领域中的高斯混合模型和全局背景模型(UBM)引入语音发音质量评价领域,提出一种新的评价英语发音质量的算法。该算法训练出标准发音的全局背景模型。UBM模型描述与音素无关的特征分布,定义段时长归一化的相似度比例对数为音素的发音质量分数,综合得到整旬发音的评分结果。实验证明,在实验室自行采集的非母语语音数据库上,该算法评分与专家评分的相关性达到了0.700,优于其他评分算法。 展开更多
关键词 全局背景模型 对数似然比 高斯混合模型 发音质量评价
下载PDF
基于UBM降阶算法的高效说话人识别系统
16
作者 单振宇 杨莹春 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2009年第6期978-982,共5页
为了提高基于高斯混合模型-通用背景模型(GMM-UBM)说话人识别系统的运算速度,提出了通用背景模型(UBM)降阶算法,该方法采用极大似然估计法训练一个高阶UBM,再采用UBM降阶算法得到低阶UBM.采用最短距离高斯分量替换空映射集合的方法解决... 为了提高基于高斯混合模型-通用背景模型(GMM-UBM)说话人识别系统的运算速度,提出了通用背景模型(UBM)降阶算法,该方法采用极大似然估计法训练一个高阶UBM,再采用UBM降阶算法得到低阶UBM.采用最短距离高斯分量替换空映射集合的方法解决了空映射集问题.通过实验方法分析了3种初始化低阶UBM方法的识别结果,发现不同的初始化方法对结果影响很小.在NIST2001 SRE数据库上的实验显示,该算法使基于GMM-UBM说话人识别系统的运算速度提高了8倍,而等错误率仅上升了4.59%,表明了UBM降阶算法在小幅降低系统识别率的情况下,可大幅度提高GMM-UBM系统的运行效率. 展开更多
关键词 说话人识别 高斯混合模型 通用背景模型
下载PDF
Research of whispered speech vocal tract system conversion based on universal background model and effective Gaussian components 被引量:1
17
作者 CHEN Xueqin ZHAO Heming 《Chinese Journal of Acoustics》 2013年第4期400-410,共11页
Directing to the weakness of the present fixed values mapping methods (method_F), a vocal tract system conversion method based on the universal background model (UBM) is proposed for improving the performance of t... Directing to the weakness of the present fixed values mapping methods (method_F), a vocal tract system conversion method based on the universal background model (UBM) is proposed for improving the performance of the speech conversion system from Chinese whis- pered speech to normal speech. For the numerous components of UBM, the errors produced by the acoustical probability density statistical model can't be ignored. Thus an effective Gaus- sian mixture components chosen method based on the posterior probability summation of the minimum spectral distortion is developed to optimizing the system performance. The proposed method (method_U) is analyzed and compared using the performance index (PI) based on Itakura-Saito spectral distortion measure. It is shown experimentally that the performance of method_U is more stability for different speakers and different phonemes than that of method_F. The average PI of method_U is better than method_F. It is shown that by selecting effective Gaussian mixture components, the PI of method_U can be further improved 5.11%. Subjective auditory tests also show that the proposed method can improve the definition and intelligibility of conversion speech. 展开更多
关键词 Research of whispered speech vocal tract system conversion based on universal background model and effective Gaussian components ubm
原文传递
An Energy Balance Simulation of the Universe
18
作者 Peter Y.P.Chen 《Applied Mathematics》 2019年第11期956-966,共11页
We have developed an energy balance equation for the universe. The two system parameters involved in the equation could be “fine-tuned” so that the predicted temperature histories all lead to what is observed in the... We have developed an energy balance equation for the universe. The two system parameters involved in the equation could be “fine-tuned” so that the predicted temperature histories all lead to what is observed in the present cosmic microwave background. We have shown that various combinations of these two parameters are possible;in particular, the present background temperature needs not be the remnant of a very hot temperature in the far distance past. We also solved for the propagation of vortex solitons in optical fibres as contrasting examples to show how electromagnetic wave could be transmitted in a particular waveform under strictly controlled conditions. To avoid singularity, all vortexes have a black centre. We conclude that while numerical techniques can be used to account for an infinite quantity, it is unlikely that such a quantity could exist in reality. 展开更多
关键词 Transient Simulation Energy Balance modelling Cosmic Microwave background Temperature Histories of the universe Vortex Solitons
下载PDF
新文科建设背景下环境设计专业“政用产学研”共育模式探索与实践
19
作者 冯道刚 金秋 任璞 《湖南包装》 2023年第1期189-192,共4页
随着城乡建设的不断深化以及市场对应用型人才提出的新要求,特别是新文科建设的背景下,需要不断创新人才培养模式。近几年政府部门在开放合作平台的搭建和政策引导方面起到了越来越重要的作用,“政用产学研”协同育人成为重要的人才培... 随着城乡建设的不断深化以及市场对应用型人才提出的新要求,特别是新文科建设的背景下,需要不断创新人才培养模式。近几年政府部门在开放合作平台的搭建和政策引导方面起到了越来越重要的作用,“政用产学研”协同育人成为重要的人才培养模式。文章对新文科背景下环境设计专业“政用产学研”共育模式实施的必要性、实施困境进行了分析,结合教学实践提出环境设计专业“政用产学研”共育模式的路径探索,以期形成成熟且能持续的“校政企”合作实践平台并能将这种育人模式成功推广。 展开更多
关键词 新文科背景 政用产学研 环境设计专业 共育模式
下载PDF
智能家居声控信号声纹识别算法
20
作者 朱敏 《高师理科学刊》 2023年第5期29-33,共5页
为了解决智能家居语音环境中的安全性问题,提出了一种基于隐马尔可夫模型-通用背景模型(HMM-UBM)的声纹识别算法,实现说话人的准确有效识别.对智能家居语音信号进行预处理,采用基于能量和过零率的双门限比较法进行端点检测,通过MFCC特... 为了解决智能家居语音环境中的安全性问题,提出了一种基于隐马尔可夫模型-通用背景模型(HMM-UBM)的声纹识别算法,实现说话人的准确有效识别.对智能家居语音信号进行预处理,采用基于能量和过零率的双门限比较法进行端点检测,通过MFCC特征提取,进行说话人的HMM-UBM模型搭建与训练,然后进行测试.该方法解决了在声纹训练过程中数据量不足的问题.通过Matlab2016a进行算法的仿真,将测试结果与传统高斯混合模型-通用背景模型(GMM-UBM)测试结果对比分析.结果表明,本系统识别正确率高于传统模型,实现了智能家居语音识别系统的安全可靠应用. 展开更多
关键词 声纹识别 智能家居 隐马尔可夫模型 通用背景模型 MFCC特征提取
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部