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Search Results: 1 - 10 of 80869 matches for " Han Xiao-Feng "
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The wave-corpuscle properties of microscopic particlesin the nonlinear quantum-mechanical systems  [PDF]
Xiao-feng Pang
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.37083
Abstract: We debate first the properties of quantum mechanics and its difficulties and the reasons resulting in these diffuculties and its direction of development. The fundamental principles of nonlinear quantum mechanics are proposed and established based on these shortcomings of quantum mechanics and real motions and interactions of microscopic particles and backgound field in physical systems. Subsequently, the motion laws and wave-corpuscle duality of microscopic particles described by nonlinear Schr?dinger equation are studied completely in detail using these elementary principles and theories. Concretely speaking, we investigate the wave-particle duality of the solution of the nonlinear Schr?dinger equation, the mechanism and rules of particle collision and the uncertainty relation of particle’s momentum and position, and so on. We obtained that the microscopic particles obey the classical rules of collision of motion and satisfy the minimum uncertainty relation of position and momentum, etc. From these studies we see clearly that the moved rules and features of microscopic particle in nonlinear quantum mechanics is different from those in linear quantum mechanics. Therefore, nolinear quantum mechanics is a necessary result of development of quantum mechanics and represents correctly the properties of microscopic particles in nonlinear systems, which can solve difficulties and problems disputed for about a century by scientists in linear quantum mechanics field.
CLASSIFICATION ALGROITHM OF REMOTE SENSING IMAGE BASED ON WEDGELET TRANSFORM
一种基于Wedgelet变换的遥感图像分类算法

HAN Min,LIN Xiao-Feng,
韩敏
,林晓峰

红外与毫米波学报 , 2008,
Abstract: 介绍了一种基于Wedgelel(楔波)变换的遥感图像分类算法.该算法将多尺度Wedgelet变换应用于遥感图像区域分割,在此基础上提取各分割区域的Gabor纹理特征实现对遥感图像的分类.为了检验该算法的可行性,将其应用于向海和查干湖遥感图像,并与灰度共生矩阵、高斯马尔科夫随机场等纹理分类算法进行了比较.结果表明,该算法要优于灰度共生矩阵及高斯马尔科夫随机场分类算法,能够得到较高的分类精度和Kappa系数.
Nuclear spin polarization in a single quantum dot pumped by two laser beams
Xiao-Feng Shi
Physics , 2013, DOI: 10.1103/PhysRevB.87.195318
Abstract: We theoretically investigate dynamic nuclear spin polarization in a self-assembled quantum dot pumped optically by two laser beams. With the assumption that a noncollinear interaction between the hole spin and nuclear spins leads to nuclear spin polarization, we find that both weak and strong nuclear spin polarizations can arise, depending on the intensities and central frequencies of the lasers. For weak nuclear spin polarization, we use a perturbation method to show that the distribution of the nuclear spin Overhauser field may become significantly narrower. Using Monte Carlo simulations to study a single quantum dot, we find that strong nuclear spin polarization can also be generated via appropriate optical pumping.
Pre-management of Disentanglement
Xiao-Feng Qian
Mathematics , 2012, DOI: 10.1088/1751-8113/47/26/265304
Abstract: We define threshold disentanglement (TD) as the level above which entanglement must be maintained for later use and calculate the values of quantum system parameters at $t=0$ that will ensure that the threshold is not crossed in a specified time. An important issue is the possibility of non-smooth, typically non-exponential, decay of entanglement into the state of complete disentanglement (CD). Given a specified operation time $\tau$, we determine phase diagrams showing entanglement preservation during the evolution of a generic two-qubit mixed state as a function of selected initial parameters such as concurrence and excitation probabilities. In other words, disentanglement can be pre-managed through these parameters. Three common relaxation processes - amplitude, phase and depolarization - are considered.
Research of speech emotion recognition based on emotion features classification
基于情感特征分类的语音情感识别研究

ZHOU Xiao-feng,XIAO Nan-feng,WEN Han,
周晓凤
,肖南峰,文 翰

计算机应用研究 , 2012,
Abstract: Because the speech signals were highly real-time uncertainty, this paper proposed evidences' trust entropy and dynamic prior weights to improve the basic probability function of traditional D-S theory. As the emotion recognition result was not the same by emotion features in different emotions, it presented a classification method of emotion features. In order to realize the fine-grain speech emotion recognition, it used the recognition data of different classification and the improved D-S theory to realize the emotion recognition based on multi-classification emotion features. The improved D-S theory is proved to be effective by simulation. And comparing simulation results show that the multi-classification emotion features are effective and stability.
Positive-Negative Emotional Categorization of Clothing Color Based on Brightness  [PDF]
Xiao-Feng Jiang, Xiao-Pei Bian
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B040
Abstract:

In current study, behavioral measures were conducted to investigate clothing color. The purpose was to focus on the rule that color brightness influencedpositive-negative emotional categorization. Results showed that the effect of brightness on clothing color emotion categorization was significant. With the increase of brightness, the variation curve of positive emotion appears to be a “U-shaped”, whereas that of the negative emotion shows an upside down “U-shaped”. Compared with the low brightness colors, the emotion reaction to the high brightness colors was more positive; Most of the colors with different brightness scales were classified as positive emotions and the minors were classified as negative emotions; the positive colors could be done much faster than the negative ones.

DROUGHT IMPACTS ON TERRESTRIAL ECOSYSTEM PRODUCTIVITY
干旱对陆地生态系统生产力的影响

TIAN Han-Qin,XU Xiao-Feng,SONG Xia,
田汉勤
,徐小锋,宋霞

植物生态学报 , 2007,
Abstract: 该文综述了干旱对陆地生态系统生产力的影响,分析了其影响机制,并总结了植被对干旱的响应与适应及其机理机制。干旱通过抑制光合作用来降低陆地生态系统总初级生产力,干旱还可以降低生态系统的自养呼吸和异养呼吸。同时干旱还可以通过影响其它干扰形式来间接影响陆地生态系统生产力,如增加火干扰的发生频率和强度,增加植物的死亡率,增加病虫害的发生等。在生态系统水平上干旱可以降低碳固定,减弱碳汇功能,甚至把生态系统从碳汇改变成碳源。目前生态系统水平上的干旱影响研究主要通过两种方法实现,一种是模型模拟,另一种就是大型模拟实验。作为陆地生态系统生产力的实现者,在干旱胁迫条件下,植物也会采取积极的适应策略以减弱干旱对生态系统生产力的影响,其适应策略主要分以下3种:在一些周期性发生干旱的地区,植物会调整生长期以避开干旱或通过休眠来减弱干旱所造成的伤害;还有一些植物会通过调节体内的代谢过程,改变一些生理特性来抵御干旱;而长期生活在干旱条件下的植物则通过进化来改变了自身的生理生化代谢过程,形成耐旱机制。目前,植物对干旱响应的分子学机制,以及生态系统水平上对干旱的响应和适应仍然是薄弱的领域,也必然成为未来研究的重点。
Effect of Ceramic Fiber Content on Tribology Properties of Semi-metal Friction Material
硅氧铝陶瓷纤维含量对半金属摩擦材料摩擦磨损性能的影响

HAN Ye,TIAN Xiao-feng,YIN Yan-sheng,
韩野
,田晓峰,尹衍升

摩擦学学报 , 2008,
Abstract: Semi-metal friction material containing aluminum-silicon fiber was prepared. Effects of aluminum-silicon fiber content on fade, recovery and wear properties of semi-metal friction material were studied using DMS-150 friction tester. Morphologies of the wear surfaces were observed by scanning electron microscopy. Heat fading resistant property of friction material was improved obviously when the content of aluminum-silicon wool was more than 5wt. %, but at the mean time the property of recovery descended and wear rate increased lightly. The wear meehanism was adhesive wear for semi-metal friction material, while the wear mechanism for material with hybrid fiber was a mixing of adhesive and abrasive wear.
Study on Evaluation Method of Aluminum alloy Pulse MIG Welding Stability Based on Arc Voltage Probability Density  [PDF]
Jing Nie, Xiao-Feng Meng, Yu Shi
Journal of Signal and Information Processing (JSIP) , 2011, DOI: 10.4236/jsip.2011.23020
Abstract: Bring forward a new analytical method in order to evaluate the stability of the process of aluminum alloy pulsed MIG welding. The ratio of the first and the second peak in arc voltage signal probability density was selected to evaluate aluminum alloy pulse MIG welding stability. By calculating the arc voltage signal probability density from 80 sets of welding experiments, the ratio of the two peaks in arc voltage probability in every set was captured. And the evaluation system of aluminum alloy pulse MIG welding stability was established. The smaller the ratio of peaks in arc voltage signal probability density is, the better the stability of the welding will be; the bigger the ratio of peaks in arc voltage signal probability density is, the poorer the stability of the welding will be.
The Role of Multimodality Imaging Techniques on Differential Diagnosis of Precancerous Nodules and Hepatocellular Carcinoma  [PDF]
Hui-Jie Jiang, Xiao-Feng Li
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2012, DOI: 10.4236/ijmpcero.2012.13009
Abstract: In recent years, the incidence of hepatocellular carcinoma (HCC) has been increasing worldwide, and its high mortality seriously threatens public health. Early detection and treatment are crucial to improving the survival rate. Imaging examination widely used for the diagnosis of HCC and provides a non-invasive means of tumor visualization. The rapid development of medical imaging technology is expected to improve early-stage diagnosis rates for HCC. This article summarizes the methods for the differential diagnosis of premalignant dysplastic nodule (DN) and small hepatocellular carcinoma during the carcinogenesis of cirrhosis and reviews their application. In addition, a discussion on some recently patented medical imaging development was also presented.
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