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Search Results: 1 - 10 of 2964 matches for " 王婷婷 "
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场独立/依存型认知风格对外语学习影响的实证性研究
An Empirical Study on the Influence of Field-Independence/Dependence of Cognitive Styles on Foreign Language Acquisition
 [PDF]

张倩, 王婷婷
Modern Linguistics (ML) , 2015, DOI: 10.12677/ML.2015.34022
Abstract:
近年来语言学家对认知风格与外语学习的相关研究取得了一定的成果,但是实证性研究偏少且结论并未达成一致。本研究采用定量与定性分析结合的方法,分析文/理科大学生(场独立/混合/依存型)认知风格与外语成绩间的相关性及差异性所在。研究发现场独立/混合型认知风格与外语成绩存在相关性,且理科生比文科生的相关性更加显著。外语教学应关注学生认知风格的差异,帮助学习者发挥认知风格的优势从而提高外语学习的能力。
In recent years, linguists have made some achievements in the study on the relationship between cognitive style and foreign language learning, but relatively few empirical studies have been con-ducted and have produced inconsistent results. Based on the analysis of the quantitative and qua-litative data, the present study investigates college students’ preference for field independence/ blend/dependence cognitive style, explores the correlation between cognitive style and foreign language achievement, and examines the differences among students of different majors. The result shows that correlation exists between field independence/blend cognitive style and foreign language achievement, the correlation is more obvious in students majoring in science than those majoring in humanities. Teachers are supposed to focus on students’ different cognitive styles, make teaching plans according to students’ own features, train and help students to exploit their own advantages in cognitive style to the full so as to enhance their abilities in foreign language learning.
重复囚徒博弈在无标度网络中的演化
The Evolution of Repeated Prisoner’s Dilemma Game on Scale-Free Network
 [PDF]

王涛, 陈志刚, 王婷婷
Computer Science and Application (CSA) , 2012, DOI: 10.12677/CSA.2012.25045
Abstract: P2P和移动P2P网络中,自主节点都需要在有限资源(带宽,电源等)下进行通信和数据共享。如何提高系统的合作水平而减少背叛(搭便车),是个值得深入研究的问题。重复囚徒博弈在生物学、社会学、经济学、信息学等领域正在被广泛的研究,在个体自私的情况下整体涌现合作行为是人们感兴趣的焦点。本文利用遗传算法研究重复囚徒困境博弈在无标度网络中的演化,揭示网络中节点产生合作的相关机制。网络中的节点记忆以前多次和相邻节点的博弈情况,按照一定的编码方法转换成遗传算法中的基因,本文研究了不同记忆长度对合作水平的影响,特征基因的显现分布和基因使用频率,合作节点的度分布情况等。这些研究结论对于设计一个自组织的具有合作机制的系统提供了理论上的支持。
In P2P network and mobile P2P network, independent individuals need to share resources under limited bandwidths and powers. It is valuable to study how to increase the systems’ cooperation while reduce free-riding. Repeated Prisoner’s Dilemma game is widely studied in the fields of biology, sociology, economics and informatics. People’s interests focus on the cooperation emerged in a system that individuals are selfish. We study the iterated games evolved on scale-free network with genetic algorithm, and reveal the cooperation mechanism of nodes in networks. Nodes can remember the game historical strategies and code them into genes. We show that memory length’s effect to cooperation level, and that some characteristic genes and frequently used genes emerge after some generations. We also study cooperate strategy distribution on different degree-nodes. These results may give theoretic support to the design of a self-organized system which can support cooperation.
上海海洋产业发展现状与结构优化——基于灰色系统理论的分析
王婷婷
农业现代化研究 , 2012,
Abstract: 上海在"十二·五"规划中提出"四个中心"建设,提升海洋产业在上海经济发展中的比重。上海海洋产业发展已经实现了从"一二三"产业结构向"三二一"产业结构的过渡,上海海洋产业为地区就业提供了广阔的空间;但在海洋环境方面不容乐观,长江口生态系统总体状况仍处于亚健康状态。本文运用灰色系统理论,分别从上海海洋产业结构发展、上海各海洋产业发展关联性,以及上海海洋产业发展决策三方面进行实证分析,提出应该继续优化上海海洋产业结构,重点发展海洋主导产业和优势产业,培育发展海洋产业群,提升高科技在海洋产业发展中的作用的政策建议。
因果模型在类比推理中的作用
王婷婷,莫雷
心理学报 , 2010,
Abstract: 通过操纵因果模型的特征维度及推理方向, 探讨因果模型在类比推理中的作用。实验一探讨了当结果特征未知时进行类比推理的情况, 发现在一果多因时, 被试采用因果模型进行类比推理, 而在一因多果时, 被试同时采用因果模型和计算模型进行类比推理。实验二探讨当原因特征未知时进行类比推理的情况, 发现在一果多因和一因多果时, 被试均采用因果模型进行类比推理。结果表明:(1)当结果特征未知时, 人们会建构因果模型进行类比推理。且当因果模型和计算模型处于冲突情境时, 人们会采用因果模型进行类比推理; 但当因果模型和计算模型处于非冲突情境时, 人们会同时采用因果模型和计算模型。(2)当原因特征未知时, 即按照因果模型推理的难度增加时, 人们仍会建构因果模型进行类比推理。
富勒烯金属有机配合物的研究进展有机化学
王婷婷, 曾和平
有机化学 , 2008,
Abstract: 介绍了近几年来富勒烯金属包合物、富勒烯球体与金属键联形成的配合物、富勒烯有机衍生物与金属原子形成的配合物以及富勒烯-有机金属配合物形成的共晶的研究进展.
N-甲基-2-(4'-N-乙基咔唑基)-[60]富勒烯吡咯烷及其衍生物的合成,电荷分离态特征
王婷婷,曾和平
化学学报 , 2005,
Abstract: 通过1,3-偶极环加成方法在微波照射下合成了N-甲基-2-(4'-N-乙基咔唑基)-富勒烯吡咯烷(C60-Cz)和N-甲基-2-(4'-N,N-二苯基氨基)-富勒烯吡咯烷(C60-TPA),用质谱,1HNMR,IR等对其结构进行了表征.用激光光解时间分辨瞬态谱研究了N-甲基-2-(4'-N-乙基咔唑基)-富勒烯吡咯烷的分子内电荷转移过程,在近红外区观测到了长寿命电荷分离态C60?--CZ?+的存在,其寿命为0.28μs.运用Gaussian98量子化学程序包,利用密度泛函的方法对N-甲基-2-(4'-N,N-二苯基氨基)-富勒烯吡咯烷几何构型进行了优化,并在优化基础上用ZINDO方法计算了化合物C60-TPA的电子光谱,计算结果表明,光谱吸收峰在440nm,与实验值433nm基本一致.
因果模型在类比推理中的作用
王婷婷,莫雷
心理学报 , 2010,
Abstract: ?通过操纵因果模型的特征维度及推理方向,探讨因果模型在类比推理中的作用。实验一探讨了当结果特征未知时进行类比推理的情况,发现在一果多因时,被试采用因果模型进行类比推理,而在一因多果时,被试同时采用因果模型和计算模型进行类比推理。实验二探讨当原因特征未知时进行类比推理的情况,发现在一果多因和一因多果时,被试均采用因果模型进行类比推理。结果表明:(1)当结果特征未知时,人们会建构因果模型进行类比推理。且当因果模型和计算模型处于冲突情境时,人们会采用因果模型进行类比推理;但当因果模型和计算模型处于非冲突情境时,人们会同时采用因果模型和计算模型。(2)当原因特征未知时,即按照因果模型推理的难度增加时,人们仍会建构因果模型进行类比推理。
基于模拟植物生长算法的超市收银口优化调度
王婷婷,杨琴
计算机应用 , 2014,
Abstract: ?超市作为服务型企业,能否最大限度地使顾客满意,直接关系到企业的利润收益和市场竞争力,因此对超市收银口的优化调度研究具有重要的现实意义。首先运用三元组α/β/γ方法对问题进行描述,将收银口调度描述为一类以最大化顾客满意度为主要目标,最小化经营成本为次要目标,具有机器使用限制和先入先出(fifo)原则的优化调度问题,并建立了相应的数学模型;接着运用模拟植物生长算法(pgsa)进行了算法设计;最后用实际案例进行了数值仿真,验证了方法的有效性和可行性。
点阵激光治疗纤维毛囊瘤1例报告
王婷婷,李咏
- , 2017,
Abstract:
基于Gram-Charlier级数的OFDM信号频谱感知算法
Spectrum sensing algorithm for OFDM signal based on Gram-Charlier series

王婷婷,张士兵
- , 2018,
Abstract: 为了改善OFDM信号频谱感知性能,文中提出一种基于Gram-Charlier级数的频谱感知算法。该算法以OFDM信号循环前缀的相关性作为基本信息构造了频谱检测统计量,用Gram-Charlier级数展开法表示主用户信号存在和不存在时的频谱检测统计量概率密度函数,通过比较两种情况下的统计量概率密度函数作出频谱判决。该算法克服了传统频谱检测算法中判决门限难以兼顾频谱检测概率和虚警概率的困境。仿真结果表明:该算法能够同时兼顾检测概率和虚警概率,具有较好的OFDM信号频谱检测性能。
To improve the performance of spectrum sensing of orthogonal frequency division multiplexing (OFDM) signals, a spectrum sensing algorithm based on Gram-Charlier series is proposed. Based on the correlation of cyclic prefix of OFDM signals, the detection statistics are constructed, and then the probability density functions of the detection statistics, when the primary user is presence and absence, are approximated with the Gram-Charlier series expansion. Finally, the spectrum sensing decision is made by compared with the probability density functions. The algorithm can solve the problem, i.e., the decision threshold is difficult to consider the spectrum detection probability and false alarm probability in traditional spectrum detection algorithm. Simulation results show that the algorithm can give consideration to both detection probability and false alarm probability.Thus, it has better performance of spectrum detection of OFDM signals
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