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Search Results: 1 - 10 of 314928 matches for " 王甲娜 "
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多变量自回归和多线性主成分分析结合的多通道信号特征提取研究
A Novel Method of Multi-channel Feature Extraction Combining Multivariate Autoregression and Multiple-linear Principal Component Analysis

,张彦
- , 2015, DOI: 10.7507/1001-5515.20150004
Abstract: 脑机接口(BCI)系统通过从脑信号中提取特征对其进行识别。针对自回归模型特征提取方法和传统主成分分析降维方法处理多通道信号的局限性, 本文提出了多变量自回归(MVAR)模型和多线性主成分分析(MPCA)结合的多通道特征提取方法, 并用于脑磁图/脑电图(MEG/EEG)信号识别。首先计算MEG/EEG信号的MVAR模型的系数矩阵, 然后采用MPCA对系数矩阵进行降维, 最后使用线性判别分析分类器对脑信号分类。创新在于将传统单通道特征提取方法扩展到多通道。选用BCI竞赛IV数据集3和1数据进行实验验证, 两组实验结果表明MVAR和MPCA结合的特征提取方法处理多通道信号是可行的。
Brain-computer interface (BCI) systems identify brain signals through extracting features from them. In view of the limitations of the autoregressive model feature extraction method and the traditional principal component analysis to deal with the multichannel signals, this paper presents a multichannel feature extraction method that multivariate autoregressive (MVAR) model combined with the multiple-linear principal component analysis (MPCA), and used for magnetoencephalography (MEG) signals and electroencephalograph (EEG) signals recognition. Firstly, we calculated the MVAR model coefficient matrix of the MEG/EEG signals using this method, and then reduced the dimensions to a lower one, using MPCA. Finally, we recognized brain signals by Bayes Classifier. The key innovation we introduced in our investigation showed that we extended the traditional single-channel feature extraction method to the case of multi-channel one. We then carried out the experiments using the data groups ofⅣ_ⅢandⅣ_Ⅰ. The experimental results proved that the method proposed in this paper was feasible.
沈阳市中小学生心理健康状况与人格特征关系
,常颖,付家亮,
中国公共卫生 , 2010, DOI: 10.11847/zgggws2010-26-11-41
Abstract: ?目的了解辽宁省沈阳市中小学生心理健康状况及其与人格特征的关系,为心理健康教育提供依据。方法采用分层整群抽样方法对辽宁省沈阳市7所中学和4所小学的1499名中小学生进行问卷调查。结果沈阳市中小学生的心理健康问题检出率为19.3%,其中男生和女生的检出率分别为20.7%和18.2%;长处与困难问卷(SDQ)情绪症状、品行问题、多动注意不能、同伴交往问题、社会行为得分和困难总分分别为(2.9±2.4),(2.5±1.8),(3.2±2.1),(3.2±1.7),(7.3±2.4)和(11.9±6.1)分,与常模比较,情绪症状、品行问题、同伴交往问题得分和困难总分均高于常模(P<0.01);艾森克人格问卷(EPQ)内外向(E)、精神质(P)、神经质(N)和掩饰(L)得分分别为(17.7±4.8),(3.6±3.3),(8.2±5.8)和(15.0±3.8)分;相关分析结果表明,E和L与社会行为呈正相关关系(P<0.01),与情绪症状、品行问题、多动注意不能、同伴交往问题和困难总分均呈负相关关系(P<0.01);P和N与社会行为因子呈负相关关系(P<0.01),与情绪症状、品行问题、多动注意不能、同伴交往问题和困难总分均呈正相关关系(P<0.01);多元线性回归分析结果表明,人格特征中E(β=-0.220)、P(β=0.195)、N(β=0.428)和L(β=-0.172)与心理健康水平密切相关,并影响中小学生心理健康水平(P<0.01)。结论沈阳市中小学生心理健康问题较多;人格特征对心理健康有预测作用。
初中生积极适应的发展轨迹:基于潜变量增长模型的分析
李彩,顾娇娇,,焦思
- , 2017,
Abstract: 摘要: 采用问卷法对369名青少年在初中阶段的积极适应状况进行历时三年的四次追踪测试,通过潜变量增长模型检验初一至初三期间个体积极适应的变化趋势,同时考察随时间稳定变量(学校转换)和随时间变化变量(压力知觉)对积极适应的影响。结果发现:1、从初一到初三,个体的自我肯定和行事效率均呈曲线上升趋势,且上升速度逐年下降;亲社会倾向呈线性上升趋势;积极应对则呈线性下降趋势;2、学校转变对初中生积极适应发展的影响较小;3、压力知觉对当时初中生的积极适应具有显著抑制作用。
Abstract: Social adjustment has been the core issue of developmental psychology. Positive adjustment is typically defined as the behavior that is consistent with social norms and benefits the individual’s survival and development across multiple domains that are self adjustment (self-affirmation), interpersonal adjustment (pro-social tendency), behavioral adjustment (acting efficiency) and environmental adjustment (active coping) respectively. Positive psychology indicates that positive adjustment is independent of negative adjustment, and the focus on positive function of social adjustment can facilitate social stability as well as the harmony between individual and environment. However, most previous research has focused on the negative function of social adjustment, such as problem behavior, negative emotion and so on. Much less is known about the developmental trajectories of positive adjustment and the contributing factors and mechanisms that underlie the development, particularly in life stage with an accumulation of changes and challenges. The transition to adolescence has been characterized as a critical period with the dramatic change resulted from school transition and sharp physical and psychological development. Thus, the development of positive adjustment plays an important role in adolescents’ healthy growth. Accordingly, a three-year longitudinal study was conducted to examine the change trajectories of positive adjustment, and how external factor (school transition) and internal factor (perceived pressure) shape the development for middle school students. A total of 369 seventh-grade adolescents were recruited from two middle schools and participated in the study. Among them, 290 adolescents (140 females and 150 males, mean age is 12.32 years, SD = 0.52) participated in all three consecutive years, in which 181 adolescents made the transition from primary school to different middle school and 108 continued in the same school (1 adolescent didn’t respond to the item). The study adopted Adolescents’ Social Adjustment Assessment Scale and Perceived Pressure Questionnaire for Middle School Students to assess four positive adjustment indices (self-affirmation, pro-social tendency, acting efficiency and active coping) and perceived pressure for four time points in November of 2012, May of 2013, December
护士抑郁症状与职业紧张关系
吴辉,胡宝生,,迟铁爽,
中国公共卫生 , 2010, DOI: 10.11847/zgggws2010-26-05-48
Abstract: ?目的探讨护士抑郁症状与职业紧张的关系,以改善护士身心健康水平。方法采用横断面调查方法,于2008年5-7月,随机抽取辽宁省20所医院的2106名护士进行问卷调查;采用抑郁自评量表(CES-D)测量抑郁症状,职业紧张量表(OSI-R)测量职业紧张,应用Logistic回归分析护士抑郁症状与职业紧张的关系。结果辽宁省20所医院护士抑郁症状率为55.7%;Logistic回归分析显示,任务过重(高与低:OR=3.00),任务冲突(高与低:OR=1.37),任务不适(高与低:OR=1.58),社会支持(低与高:OR=1.54),理性处事(低与高:OR=1.35)与抑郁症状密切相关(P<0.01)。结论辽宁省护士处于较高的抑郁症状危险,抑郁症状与职业紧张密切相关。
用于高校优质中水原位处理的设备研究
,,陆兆华,陈平,董晓
环境工程学报 , 2007,
Abstract: 为了提高高校优质中水的处理与回用率,提出了适用于高校优质中水的处理与回用系统,设计了中水原位处理设备,并进行了试验验证。结果表明,沉淀-SOBMR-过滤设备能够实现无动力、自动化运行,尤其适合于盥洗和洗浴废水的处理。沉淀单元对盥洗废水COD和SS去除率分别为23.8%和55.7%;SOBMR单元对盥洗废水COD和SS去除率分别为35.8%和27.9%;过滤单元能有效去除废水中绝大部分SS,且能耐受SS冲击负荷,对废水COD去除率先增后降,受水力负荷的影响,负荷越小,处理效果越好。整个系统出水水质满足杂用水对COD、SS和色度等要求,可用于冲厕和杂用。每套处理装置可节约水资源151.2m3/a,设备投资回收期为2.01年,具有巨大的经济效益。
基于职业生涯规划视野下高校教师岗前培训思考
Based on the Perspective of Career Planning of University Teachers Think Pre-Job Training
 [PDF]


Vocational Education (VE) , 2013, DOI: 10.12677/VE.2013.21002
Abstract:

青年教师是高校持续发展的后备力量。加强对青年教师的岗前培训,对教师个人与学校的发展都有着极其重要的作用。本文是从职业生涯规划的视角探讨高校青年教师岗前培训的意义与措施。

The young teachers are the backup power for sustainable development of university. Strengthen the pre-job training of young teachers is playing a vitally important role on the development of both teachers’ individual and school. This article is written for exploring the significance and measures of high school young teachers’ pre-job training, which based on the perspective of career planning.

领导者愿景驱动下的承诺型组织的形成及其成长研究
A Study on the Formation and Growth of the Leader Vision-Driven Commitment Organization
 [PDF]


Emergence and Transfer of Wealth (ETW) , 2013, DOI: 10.12677/ETW.2013.32003
Abstract:
领导者的愿景直接影响着企业组织行为变革的方向和范围。领导者愿景能否被有效引导、认可、接受,这主要取决于企业的价值观是否与员工的价值观产生共鸣。本文通过分析明确了企业领导者愿景的实现过程是一个凝聚人心、形成合力的过程,将自己的心智模式转换成企业的组织行为,把个人愿景转换为企业的共同愿景,由此形成企业成长的内生基础。
The vision of the leader has a direct impact on the direction and scope of the enterprise organizational behavior change. Whether the leader vision can be effectively conducted, recognized and accepted depends primarily on whether the values of the enterprise and the employee’s values are in consistence. Through the research, we can conclude the realization of the vision is a process for cohering public feeling.On its way, the mental models of organization members convert to enterprise organizational behavior and the personal vision converts to the shared vision. Finally, these will be helpful to realize the sustainable development of enterprises.
CRM在电子商务企业品牌内涵提升中的适用性分析
Suitability Analysis in Application of the CRM System in Enhancing the E-Business Enterprises Brand Connotation
 [PDF]


E-Commerce Letters (ECL) , 2014, DOI: 10.12677/ECL.2014.31001
Abstract:

探索CRM如何植根于电子商务市场润土中,如何利用CRM提升电子商务企业品牌内涵建设,如何加强电商企业的硬技术与软实力是具有现实意义的。本文从刚柔并蓄两个维度对客户关系管理在中国电子商务企业品牌内涵提升中的适用性做出了分析,认为实施CRM的关键之处在于电子商务企业如何对客户信息资源进行优化配置,达到提升客户信息分析挖掘能力并做出快速反应的能力,促成最终购买。从企业长远发展上看,CRM在提升客户价值、增强客户黏性、客户对企业品牌认知与偏好形成等品牌内涵方面极具战略与经济价值。
It is of practical significance for China e-business enterprises to explore how CRM information system enhances the Enterprises Brand Connotation, hard technique and soft power. This paper analyzes the applicability in enhancing the e-commerce enterprises’ brand connotation based on two dimensions of customer relationship management (CRM), which points out crucial operation of the CRM system is optimizing the allocation of customer information resources. The aim is to promote mining capabilities ability, just- in-time response and the ultimate purchase. In the long-term development of the enterprises, CRM has a great Strategic and Economic worth in enhancing customer value, loyalty, brand awareness and customer preference formation.

Research on the apparatus for in-situ treatment of high quality reclaimed water in universities
用于高校优质中水原位处理的设备研究

Li Jialiang,Wang Lin,Lu Zhaohu,Chen Ping,Dong Xiaona,
,,陆兆华,陈平,董晓

环境工程学报 , 2007,
Abstract: In order to increase the treating and recycling ratio of reclaimed water in universities, this paper introduced the conception of high quality wastewater treatment and recycling system, designed a high quality wastewater treatment instrument in situ, and carried out some demonstrating experiments. The result showed: sedimentation-SOBMR-filtration system can run automatically without power, which fit to treat washing and bathing wastewater especially. The COD and SS removal rates for washing wastewater are 23.8% and 55.7% in sedimentation unit, 35.8% and 27.9% in SOBMR unit respectively. Filtration unit can remove SS in washing water efficiently, and can bear the SS load strike, but the COD removal was affected by hydraulic load,the lower the load low,the high the COD removal rate. The ultimately outflow quality met the all-purpose water quality standard require for COD,SS and chroma, etc such as lavatory washing water or other usages. Each instrument can spare water resource 151.2 m3/a, and its investment returning period is about 2.01 year, which can bring great economic benefits.
三元定常超音速流动特征面及相容普遍关系式
,波涛
工程热物理学报 , 1984,
Abstract:
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