“机械制造技术”教学资源库的建设与应用

文章阐述了《机械制造技术》教学资源库建立的原则。介绍了该库中的主要组成资源以及在实践中的应用,在创建开放式学习环境、激发学生创新热情等方面收到了良好的教学效果。     

Extraction of novel features for emotion recognition

Hilbert-Huang transform method has been widely utilized from its inception because of the superiority in varieties of areas. The Hilbert spectrum thus obtained is able to reflect the distribution of the signal energy in a number of scales accurately. In this paper, a novel feature called ECC is proposed via feature extraction of the Hilbert energy spectrum which describes the distribution of the instantaneous energy. The experimental results conspicuously demonstrate that ECC outperforms the traditional short-term average energy. Combination of the ECC with mel frequency cepstral coefficients (MFCC) delineates the distribution of energy in the time domain and frequency domain, and the features of this group achieve a better recognition effect compared with the feature combination of the short-term average energy, pitch and MFCC. Afterwards, further improvements of ECC are developed. TECC is gained by combining ECC with the teager energy operator, and EFCC is obtained by introducing the instantaneous frequency to the energy. In the experiments, seven status of emotion are selected to be recognized and the highest recognition rate 83.57% is achieved within the classification accuracy of boredom reaching 100%. The numerical results indicate that the proposed features ECC, TECC and EFCC can improve the performance of speech emotion recognition substantially.     

4-component 2-D CFDFD method in analysis of lossy circular waveguide with fractal rough surface

In this paper, equivalent surface impedance boundary condition (ESIBC), which takes fractal parameters (D, G) into SIBC, is implemented in the 4-component 2-D compact finite difference frequency domain (2-D CFDFD) method to an- alyze the propagation characteristics of lossy circular waveguide with fractal rough surface based on Weierstrass-Mandelbrot (W-M) function. Fractal parameters’ effects on attenuation constant are presented in the 3 mm lossy circular waveguide, and the attenuation constants of the fi...     

Optical QPSK/16QAM modulation based on serial-parallel MZM scheme in radio-over-fiber system

A novel scheme of optical modulation in 40 GHz radio-over fiber (RoF) system is proposed. It generates optical QPSK/16QAM signals in a serial-parallel structure of Mach-Zehnder modulators (MZMs). The millimeter-wave is obtained with optical frequency multiplication (OFM). Furthermore, modulation on optical-wave is transferred onto millimeter-wave. It can be used to increase transmission capacity of millimeter-wave RoF systems.     

学习效能感在高中生班级环境与 学习动机间的中介效应

为考察高中生学习效能感在班级环境与学习动机间的中介效应,采用学习动机、学 习效能感和班级环境问卷调查403名高中生.结果表明:(1)女生威信动机高于男生;男生 学习效能感高于女生;师生关系一年级好于二年级,女生好于男生;(2)学习动机与师生关 系、竞争、基本能力感和控制感正相关;基本能力感与秩序纪律负相关,与同学关系和控制 感正相关;控制感除学习压力外,与班级环境其他维度正相关.(3)基本能力感在秩序纪律 和学习动机间具有中介作用,控制感在竞争和学习动机间具有中介效应.高中生学习动机 的激发与维持的关键是提高学生的学习效能感,适当的竞争环境与相对民主、自由的班级 氛围有利于学生学习效能感的提高.     

盲生刻板行为研究综述

盲生刻板行为在某种程度上具有不良影响,一些行为不仅对于自身身体有一定伤害,而且对于其融入主流社会造成了一定阻碍.尤其在先天盲生及多重残疾盲生中,刻板行为的发生率更高.因此,盲生家长和教师必须重视这些行为.本文通过文献研究,从盲生刻板行为的概念界定、出现率、产生原因、不良影响、评估和干预等几个方面,对盲生刻板行为的相关研究进行了概述.     

高职高专师资培训效果评估体系之构建

近年来,高职高专院校师资培训形式日益多样化,但忽视了对培训效果的评估。文章分析了高职高专师资培训效果评估存在的问题,从科学分析培训需求、全面评价、方式多元化等方面着手,试图构建一种全新的培训效果评估体系,以期进一步提高高职高专院校师资培训效果。     

中国近现代“国进民退”现象分析

由于“国进民退”必然引发一系列利益关系的调整,因而也成为我们关注的重点。在中国近现代史上,洋务运动时期、20世纪三四十年代及建国初期均发生过大规模的“国进民退”现象。这三次“国进民退”的历史背景、具体途径、涉及领域、实现程度及其影响等均有所不同,这似乎也说明对“国进民退”现象也不能一概而论。     

释义在二语心理词汇重建中的作用研究

本文探讨了释义在第二语言心理词汇重组的过程中所产生的作用。文章首先从理论层面阐述了目标语解释方式一释义在词汇教学中的意义。同时结合大学生英语词汇学习的特点设计了教学实验,试验结果表明：不同的解释方式对学习者二语心理词汇的重组产生不同的影响,目标语解释方式即释义对学习者二语心理词汇的重组有积极的作用,该结论对提高二语学习者词汇学习效率,促进二语心理词汇重组具有十分重要的作用。     

论如何提高高校英语专业语法教学效果

高校英语专业的语法课经历了一个从主导到边缘化,又理性回归的过程。目前,虽然众多有识之士认识到语法教学回归的重要性,但高校语法教学的现状依然不容乐观。近年来,探索高校英语专业语法课教学的文章虽然比较多,但这些文章大多都是从语言学理论角度和指导思想角度来写的。教学是一种实践活动,本文以解决语法教学问题为出发点,从实践教学的角度,探讨了几种提高语法教学效果的实用方法,以期对高校英语专业的语法教学有所帮助。