基于智能视觉的小差异行为特征分类

针对传统差异行为特征分类方法难以对小差异行为进行有效识别且分类精度低等缺陷,提出了基于智能视觉的小差异行为特征分类方法。首先采用免疫多Agent方法对小差异行为进行特征提取,对获取的图像集合实施免疫多Agent操作,分析人物轻微形变的小差异行为,获取特征提取集;然后采用视频帧图像阵列检测方法对特征提取集实施像素灰度预处理,通过构建视频帧图像阵列,跟踪识别初始化学习得到灰度像素值,获取较优的小差异行为特征集;最后基于多衡量标准的小差异行为特征分类方法,对较优特征集实施分割操作,采用各个特征子集与衡量标准对比的方式,获取最优小差异行为特征分类结果。实验结果表明,所提方法提高了小差异行为特征的分类精度,且具有较高的工作效率。

小差异运动图像中关键兴趣姿态点的差异特征分离

在一些连续帧的运动图像中,连续图像帧之间运动姿态点差异很小,形成像素粘连。这些细微的粘连差异特征不能形成很好的特征分离,将影响后期的处理精度。提出一种小差异运动图像中关键兴趣姿态点的差异特征分离方法,通过计算连续运动图像帧的轮廓像素空间位置参数,设置轮廓像素方向分量,计算任意像素两端的灰度值,通过运动图像窗口的移动,进行像素灰度累加,完成连续帧图像轮廓区域空间位置参数,结合连续图像间的差异拟合参数,破处粘连,实现小差异运动图像中关键兴趣姿态点的差异特征分离。仿真实验结果表明,该方法可以对高精度连续图像帧之间的运动特征差异进行分离,提高特征提取精度。

海量小差异图像群中有效分类方法研究与仿真

对海量小差异图像群进行有效分类,能够极大地满足用户对于图像搜索及管理需求.传统的海量小差异图像分类的方法需要限定大量的分类约束条件,存在分类效率低,无效分类多的弊端.为此,提出基于模糊贴近度改进的海量小差异图像分类方法.利用SIFT算法对采集的海量小差异图像群进行特征提取分析,为进行图像进一步分类提供数据支持.把模糊贴近度的概念引入到分类算法中,对海量小差异图像群进行分类模型构建,求取最优解,完成对海量小差异图像群的最优分类.实验结果表明,运用改进分类算法对海量小差异图像进行分类,能够提高图像分类的效率和分类的准确率.

一种符合小差异分类的人员越界图像检测方法

在对一些特殊区域进行人员越界进行检测过程中,当前的智能检测方法为了克服图像中人员小差异带来的干扰,需要限定大量约束条件,检测精度差,效率较低。为提高检测的准确率,提出一种采用小差异归一分类的人员越界检测方法。分析了人员越界图像检测原理,将检测区间标量网、人员检测中的模糊化二元变量属性映射至某一区间中,再对全部可检测属性的差异度进行计算,同时依据最小差异度完成分类,依据尺度不变特征对小差异对象进行特征提取,大幅简化小差异分类过程和精度,最大程度降低人员差异过小带来的干扰问题。检测实验结果表明,所提方法具有很高的检测精度及可靠性。

600 MW锅炉小差异特性混煤燃烧数值模拟

利用Fluent软件对某电厂600 MW煤粉锅炉混煤掺烧过程进行数值模拟,研究掺烧小差异特性混煤对炉内燃烧过程的影响。通过对不同掺烧比例工况下温度场,烟气成分,炉膛出口NOx浓度,燃烧器喷口颗粒燃烬率的分析,结果表明:易燃煤种在小差异特性煤种掺烧过程中起到的促进和抑制燃烧作用并不明显;与单烧设计煤种相比,掺烧比例增加,有利于增加主燃区内煤粉颗粒燃烧份额,提高喷口颗粒燃烬率;最上层燃烧器喷口的颗粒燃烬率明显低于下层,所以实际运行中应该保证最上层燃烧器喷口周围氧气的充足和均匀分布。

在小差异容许假设下的弹道一致性检验方法

分析了"相等"假设下的弹道一致性检验方法,找出了它本身固有的缺陷,建立了以小量差异容许为基础的弹道一致性假设及检验方法,并得出弹道一致性检验的三种结论的给出条件:弹道一致的条件、弹道不一致的条件、不能断定一致或不一致的条件。

R/S AND WAVELET ANALYSIS ON EVOLUTIONARYPROCESS OF REGIONAL ECONOMIC DISPARITY IN CHINA DURING PAST 50 YEARS

This paper shows the dynamic process of regional disparity of economic development in China in the past 50 years from a new insight by using the rescaled range statistic (R/S) analysis and wavelet analysis of the Theil index sequence with different time scales. The main conclusions are: 1) The regional disparity of economic development in China, including the inter-provincial disparity, inter-regional disparity and intra-regional disparity, has existed for many years. Theil index by the comparative price has revealed the true trend for comparative disparity of regional economic development from 1952 to 2000. 2) Decomposition of Theil index indicates that the dynamic trend of comparative inter-provincial disparity in the coastal region is in line with dynamic trend of inter-provincial disparity in the whole China. 3) The R/S analysis results tell us that during 1966-1978, the Hurst exponent H=0.504 approximate to 0.5, which indicates that in that period the evolution of comparative inter-provincial disparity of economic development showed a random characteristic, and in the other periods, i.e. 1952-1965, 1979-1990 and 1991-2000, the Hurst exponent H>0.5, which indicates that in those periods the evolution of the comparative inter-provincial disparity of economic development in China had a long-enduring characteristic. 4) By using wavelet analysis at different time scale, we arrived at a conclusion that the evolutionary process of the disparity of economic development of China is not a simple inverted U shape but a compound of several U shapes. The result tells us that the evolutionary plot of inter-provincial disparity in China follows the inverted U on the whole at the higher scale, 24 ( 16 years). That is to say, the disparity tends to rise in the first stage of economic development, and fall slowly over the peak in the second stage of economic development. However, if we shorten the time scale to 23 ( 8 years), then a link of several U shapes will appear.

Culture Differences Reflected in the Novel The Kitchen God＇s Wife by Amy Tan

The paper is to study the culture differences in the novel The Kitchen God＇s Wife by Amy Tan. Amy Tan was an oversea Chinese. Her mother was born and grew in old China. With the influences of her mother, Tan＇s novel inevitably reflects the Chinese culture. For herself, she was born and grew up in the States; she has been influenced by the American culture. So in her novel both the Chinese culture and American culture can be found. In this paper, the Chinese culture will mainly be talked about and analyzed, with some slight of American culture mentioned. The paper will start with the definition of culture, and the implication and features of Chinese and American culture will be explained. In the body of the paper, the typical symbols and manifestation of Chinese culture will be shown. And the conclusion is the main character＇s acceptance of the two cultures in the end.

Cardiac Electrophysiological Differences Between Kunming and C57BL6/J Mice

Objective To investigate the alterations of cardiac electrophysiological properties and substantial mechanism and find the stable arrhythmia mouse model in Kunming （KM） and C57BL6/J （C57） mice. Methods Electrocardiogram recordings were used to analyze the QT interval in vivo, and mono- phasic action potential of right and left ventricular epicardium was recorded to elicit changes of action potential duration （APD） in conventional and programmed electrical stimulation （PES）. Transient outward potassium current （Its,） was recorded via whole-cell patch-clamp technique in single right and left epicardial myocytes. Results QT interval was prolonged in KM mice relative to C57 mice （62.51±4.47 ms vs. 52.59±4.85 ms, P〈0.05）. The APD at 50% repolarization of the left ventricular epicardium （18.60±0.91 ms vs. 12.90±0.35 ms）, and APDs at 50% （17.31±6.05 ms vs. 12.00±3.24 ms） and 70% repolarization （36.13±5.32 ms vs. 2 1.95±8.06 ms） of the right ventricular epicardium in KM mice were significantly pro- longed compared with C57 mice, respectively （all P〈0.05）. KM mice were more sensitive to PES-induced ventricular tachycardia （25%, 3 of 12 hearts）, and especially to Burst-induced ventricular tachycardia （50%, 6 of 12 hearts） compared with C57 mice, which were 20% （2 of 10 hearts） and 30% （3 of 10 hearts） respec- tively. It,, densities both in the left and right ventricular epicardial myocytes from KM mice were significantly decreased compared with C57 mice, respectively （all P〈0.01）. Conclusion Our data showed that KM mice with tile prolonged QT interval and APD are ruiner- abilities to ventricular arrhythmia, which are attributed to lower Ito densities in ventricular myocytes ob- tained from KM mice than that from C57 mice.

The Particularity of Identity in Amin Maalouf＇ s Ports of Call

This study explores the intricate situation of the coexistence of different identities in Amin Maalouf＇ s Ports of Call （1996）. It contends that identity is complex, flux, and not limited to what is inherited; it is rather a psychological, political, and social amalgamation. Thus, each individual has a unique and particular identity, which is completely different from the others＇. This study is a theoretical and analytical survey of Maalouf＇s Ports of Call. It aims at proving that this novel is an example that Maalouf provides to show the challenges that characters of different identities face, and the obstacles that hinder them from assimilation. The argument is mainly based on Edward Said＇s theories that have opened up discussions about Otherness and multiculturalism, alongside with other postcolonial critics, such as Homi Bhabha. Maalouf＇s book In the Name of Identity： Violence and the Need to Belong （1996） is also integral to this study. The study concludes that it might be possible for people, in parallel with the characters of the novel, to challenge the identity predicament that the world is witnessing nowadays, and accept diversities as a way of life, rather than a reason for waging wars.

The emergence, development and regional differences of mixed farming of rice and millet in the upper and middle Huai River Valley, China

Mixed farming of rice and millet is one of the basic agricultural modes in the upper and middle Huai River Valley(HRV). According to the latest data, this agricultural mode appeared during the middle and late Peiligang Culture(7.8–7.0 ka BP) in the upper HRV, and then became a common subsistence economy in the end of the Neolithic(5.0–4.0 ka BP) in both the upper and middle HRV. However, it is still not clear how this mixed farming developed in the upper HRV after its occurrence, nor are the regional differences in the development of mixed farming between the upper and middle HRV during the Neolithic completely understood. In this paper, flotation and starch analyses were conducted on samples from eight archaeological sites in the upper and middle HRV. The results indicate that the mixed farming of rice and millet first appeared in the later phase of the middle Neolithic in the regions of the Peiligang Culture, then developed quite rapidly in the late Neolithic(6.8–5.0 ka BP), finally becoming the main subsistence economy at the end of the Neolithic in the upper HRV. However, there are obvious differences in the emergence and development of agriculture between the middle and upper HRV. Rice farming was the only agricultural system during the middle Neolithic, lasting until the end of the Neolithic, when mixed farming appeared in the middle HRV. Furthermore, although mixed farming appeared in both the upper and middle HRV during the end of the Neolithic, the roles of rice, foxtail millet and broomcorn millet in the subsistence economy were not the same. In general, millet was more widely cultivated than rice in the upper HRV, but rice occupied the same or a slightly more prominent position in the middle HRV at the end of the Neolithic. These results are significant for understanding the process of agricultural development and transformation, as well as human adaptation to climatic and cultural variability duringthe Neolithic.

ASYMPTOTIC NORMALITY OF WAVELET ESTIMATOR IN HETEROSCEDASTIC MODEL WITH α-MIXING ERRORS

Consider heteroscedastic regression model Yni= g（xni） ＋ σniεni （1 〈 i 〈 n）, where σ2ni= f（uni）, the design points （xni, uni） are known and nonrandom, g（.） and f（.） are unknown functions defined on closed interval [0, 1], and the random errors （εni, 1 ≤i≤ n） axe assumed to have the same distribution as （ξi, 1 ≤ i ≤ n）, which is a stationary and a-mixing time series with Eξi =0. Under appropriate conditions, we study asymptotic normality of wavelet estimators of g（.） and f（.）. Finite sample behavior of the estimators is investigated via simulations, too.

Science Letters:A simplified MMSE-based iterative receiver for MIMO systems

A simplified minimum mean square error(MMSE) detector is proposed for joint detection and decoding of multi-ple-input multiple-output(MIMO) systems.The matrix inversion lemma and the singular value decomposition(SVD) of the channel matrix are used to simplify the computation of the coefficient of the MMSE filter.Compared to the original MMSE detector,the proposed detector has a much lower computational complexity with only a marginal performance loss.The proposed detector can also be applied to MIMO systems with high order modulations.