数学与美

在知识,能力、素质三者辩证统一结合起来的新教改的要求．为培养学生的分析,综合逻辑推理的能力．激发学生学习数学的兴趣。教师应从各方面设计、研究．改进和实践中,让学生在现象中感悟和学习知识。     

严万里《商君书校》校勘特色平议

<商君书校>一书,以其校勘的精审、方法的缜密见长.著者淹博通贯,小学根底扎实,且熟谙于朴学家校治古书之法,因而在校勘的实践中应付裕如,左右逢源.在校勘上搜罗宏富,征引广博,在指出诸本文字差异的同时,抉择按断,兼下己意.不盲从古本或善本,敢于大胆发疑,刊改漏失,补苴未备,提出了若干具有创造性的新见解.校勘文字,大胆审慎,...     

Subdivision surface modeling system based on arbitrary topological curves network and combined subdivision

Arbitrary topological curve network has no restriction in topology structure,so it has more powerful representing ability in defining complex surfaces.A complex surface modeling system is presented based on arbitrary topological curve network and the improved combined subdivision method,its functions including creating and editing curve network,and generating and modifying curve network's interpolated surface.This modeling system can be used to the process of products'concept design,and its applications is ...     

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.     

虚拟学习社区的自组织性及形成条件

虚拟学习社区具有自发、自管、自调的特点,与自组织理论的基本内涵呈现极强的内在耦合性,如果社区中的学习者建构合理的身份认同与自我效能感、又具有一定规模的参与人数、发表的作品及跟贴达到一定数量、社区中教师具备沟通智慧与反思习惯、社区中的知识权威和意见领袖发挥影响、教育主体之间建立有效的心理契约这几方面满足了耗散结构的产生条件,虚拟学习社区就会出现自组织的特征,由无序走向有序,形成非线性复杂系统。     

利用有限仿射几何的m-面构作结合方案和PBIB设计

取有限仿射几何AG(n,F_q)中的m-面(0相似文献   

20世纪后半期局部战争的特点及类型剖析

从二次世界大战结束到现在，局部战争连绵不断。局部战争制造并加剧了国际局势的紧张，威胁着世界的和平与安全，是世界不安宁的主要因素。探讨局部战争的根源和起因，剖析局部战争的特点和类型，制定正确的政策和策略，对于维护世界持久和平、保障各国人民的自由、独立和社会进步，具有重大现实意义。     

乒乓球技术的美学特征

以美学和体育美学的基本理论为基础,对乒乓球技术进行了初步的美学分析和研究.研究表明:优良的乒乓球技术遵循“对称均衡”和“多元和谐”等“一般形式美”法则,并蕴涵速度、力量、旋转、落点和弧线等乒乓球技术独有的体育美.     

2003年全国高考中两道立体几何试题的评析

据改卷同志的介绍，今年高考中，理科的立几题得分率很低。为此。本文从解法分析着手．对此题作了深入地探讨，并提出了改进的意见。