基于深度森林的脑电情绪识别研究

为了改善传统脑电情绪识别方法需要对脑电信号进行深入了解,且需要人工提取相关特征的缺点,基于深度森林的表征学习能力对脑电样本的时域与频域数据进行自动特征提取,并融合32通道脑电信号的时域特征向量和频域特征向量,通过级联森林对特征作进一步学习。实验结果表明,该方法对效价二分类预测的准确率达到68.4%,查准率达到66.3%,查全率达到89.9%,F1分数达到76.3%;对唤醒度二分类预测的准确率达到68.2%,查准率达到65.8%,查全率达到91.2%,F1分数达到76.4%。通过与DEAP数据集使用EEG信号给出的二分类实验结果进行对比,基于深度森林的脑电情绪识别方法对未知样本的识别准确率高于DEAP的结果。     

手机依赖者对手机使用相关线索的认知加工偏向

采用手机依赖问卷筛选出27名手机依赖者(实验组)与27名非手机依赖者(控制组)为被试,以手机使用相关线索词、网络使用线索词与中性词为实验材料,采用情绪Stroop范式考察手机依赖者对手机使用相关线索的认知加工偏向.结果发现:(1)方差分析结果上,手机依赖组对手机使用线索词的反应时显著长于网络线索词与中性词,非手机依赖组未表现出差异;(2)在手机使用线索词上,手机依赖者反应时显著长于非手机依赖者,而在网络线索词、中性词均未出现差异.表明手机依赖者对手机使用相关线索存在显著的加工偏向.     

不同情绪状态对大学生注意偏向影响的实验研究

以63名大学生为被测试对象,采用不同情节的电影片段为情绪诱发材料,选取了表达消极、积极和中性情绪的中文词各40个（共120个）为测量被试注意偏向的实验材料,采用“点探测”实验范式,考察了大学生被试在愉快、悲伤和平静三种情绪状态下,对负性、正性和中性情绪词的注意偏向。结果表明个体在悲伤时对负性情绪词表现出注意偏向,在愉悦时对正性情绪词表现出注意偏向,而平静时对三类情绪词没有表现出显著差异。     

基于EEMD和LS-SVM的癫痫脑电信号识别

针对癫痫脑电(EEG)信号的非平稳性和非线性,提出一种基于集合经验模式分解(EEMD)提特征并利用最小二乘支持向量机(LS-SVM)的脑电信号分类方法。首先利用EEMD将EEG信号分成多个经验模式分量,得到各阶本征模式分量(IMF),然后提取有效特征,最后用LS-SVM对其进行分类,实验结果表明,该方法对癫痫发作间歇期和发作期EEG的提特征后分类识别正确率达到98%。     

暴力电子游戏使用者对攻击性相关线索的注意偏向

以攻击性词和中性词为刺激材料,采用情绪Stroop范式,考察不同电子游戏使用者对攻击性相关刺激的注意加工特性。结果发现,暴力电子游戏组对攻击性词的反应时显著长于非暴力电子游戏组,但两组被试对中性词的反应时没有显著差异;暴力电子游戏组对攻击性词的反应时要显著长于中性词,而非暴力电子游戏组对两类词的反应时差异不显著;在暴力电子游戏组中,高低攻击特质被试对攻击性词的反应时都显著长于中性词,而在非暴力电子游戏组中,高攻击特质被试和低攻击特质被试对两类词的反应时差异不显著。结果表明,暴力电子游戏组被试对攻击性词存在明显的注意偏向。     

基于Morlet小波的EEG疲劳程度的识别研究

为了识别人类疲劳程度,文中提出一种基于Morlet小波变换的EEG脑电信号测量方法来分析受测者的眼动信号,通过时域信号的特征值筛选来识别疲劳状态,进而了解受测者的疲劳程度.本研究使用非侵入式脑电信号测量仪,进行脑电信号原始数据的采集,使用Matlab程序对于脑电信号进行Morlet小波变换(Morlet Wavelet transform,MWT)将信号分解,再将数据转化为特征值之后,使用支持向量机(Support vector machine,SVM)与反向传播类神经网络(Back propagation neural network,BPNN)进行疲劳的状态分析.该方法对400名测试者在不同疲劳程度状态下进行测试,结果显示脑电信号识别的正确率平均达到96.15%.     

表面肌电信号的多重分形特性分析与手势识别

为改善表面肌电信号手势识别的抗噪性和分类识别率,提出了一种基于多重分形特征的表面肌电信号手势识别方法.该方法首先借助多重分形测度分析手段,研究了不同手势动作下表面肌电信号的多重分形特性,根据不同手势表面肌电信号的多重分形谱之间的差异,提出了多重分形特征的提取算法,并利用多重分形特征结合支持向量机进行了手势识别.实验研究表明,上臂肌肉的表面肌电信号具有显著的多重分形特性,最大、最小概率子集分形维数差等多重分形特征可以作为不同手势动作的分类识别的有效特征,所提出的方法具有良好的分类识别性能,是一种有效的分类识别方法.     

记忆品质和情绪品质关系的实验研究

从静态的情绪品质角度出发,探讨情绪品质和记忆品质的关系。采用艾森克人格量表和Wat-son的简式正性/负性问卷对170名被试进行施测,从中选择95名被试让他们参与“学习和记忆实验”,该实验的自变量是被试变量,这四个实验的结果指标作为因变量。结果表明：情绪稳定性这一情绪品质对瞬时记忆容量、长时记忆准确性和记忆广度有积极促进作用,对短时记忆容量没有显著影响;正性情绪这一情绪品质对瞬时记忆容量和长时记忆准确性产生积极影响,对短时记忆容量和记忆广度无显著影响;负性情绪这一情绪品质对长时记忆准确性有消极影响,而对瞬时记忆容量、短时记忆容量和记忆广度没有显著影响。     

大学生情绪与冲突应对方式关系研究

随机抽取100名某大学生为被试,探讨了情绪和冲突应对方式的关系.结果表明:(1)正性、负性情绪与冲突应对方式的各因子间有相关显著,其中正性情绪与沟通化解、反思的相关系数达到显著,负性情绪与伤害、回避与冷处理的相关系数达到显著.(2)正性情绪之下被试倾向于沟通化解、反思等应对方式,而在负性情绪之下倾向于伤害、回避与冷处理的应对方式.(3)各年级在冲突应对方式上以及情绪状态上存在着不同的倾向,并且差异显著.(4)在冲突应对方式上以及情绪状态上性别问并不存在显著的差异.     

基于表面肌电信号的腰背动作识别新方法

为提高基于表面肌电信号的人体腰背动作识别率,提出一种基于小波包能量与改进NARX神经网络的分类识别新方法。利用小波包变换对动作部位进行表面肌电信号特征提取,并采用改进NARX神经网络进行分类识别。选取8名实验者分别在扭腰、弯腰、侧弯腰3种动作下进行表面肌电信号数据采集,选择db4小波包函数对信号进行6层分解,得到第6层64个频带的小波包分解系数,代表各个动作信息的特征向量,作为改进NARX神经网络的输入进行分类识别。对照实验组中,改进NARX神经网络的识别率较高,总体识别率达到96.7%。实验结果表明,利用该识别方法对腰部动作进行分类识别,分类准确,且识别率更高。     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Social and Cultural Influence on Word Meaning

Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.