排序方式： 共有43条查询结果，搜索用时 15 毫秒
1.
This work investigated the microwave dielectric properties of A-site substitution by rare earth La3+in(Pb0.5Ca0.5)(Fe0.5Ta0.5)O3(PCFT) system.A single perovskite phase was obtained only when the doping content was 2%.Suitable La3+ doping improved microwave dielectric performances.Excessive La3+doping caused the formation of secondary phase,which resulted in the decreasing of permittivity εrand quality factor Qfvalues.Especially,when the doping content is 2%-5%,permittivity εrwas above 75 and Qfvalues were 6... 相似文献
2.
INTRODUCTION Plants have defense mechanisms against patho-gen infection by inducing systemic resistance in re-sponse to localized pretreatment with biological cotrol agents, thus making them resistant to subsequpathogen infection (Caruso et al., 1999; Hammschmidt, 1999; Mohammadi and Kazemi, 2002; yada et al., 1995; Pozo et al., 2002; Ray et al., 199Biological control of plant pathogens has receivmuch more attention. It is well known that plants amicroorganisms symbiosis is a defense m… 相似文献
3.
金德三 《河北师范大学学报(哲学社会科学版)》2008,31(2):56-59
从庄子思想产生至今的几千年间,庄子研究的成果可谓蔚然壮观。过去的庄子研究中,多认为庄子思想是消极的、逃避的、非现实的,而我则主要针对这样的观点进行反思,对庄子的思想再考察。主要从三个阶段研究庄子思想之反思。第一阶段,他从已经存在的诸子百家的思想和时代的状况中,了解和感受到社会乃至人生的有限,开始参与社会;第二阶段,之后在对那个有限的社会及人类本身的认识基础上做更为充实的观念上的、理论上的准备;第三阶段,理想与实践。他以批判的态度参与社会,主张改变社会,深入地了解社会,向社会传播他的理念和主张。 相似文献
4.
金孝真 《湖州师范学院学报》2008,30(6)
明清话本小说中所涉及的以江南地区为中心的地域社会大致可分为两个地区:一是所谓的江南地区,二是江南以外的地区社会.当时的江南对其他地区,在经济、社会风气、文化气氛等诸方面都产生了较大的影响,而且具有重要的文学研究价值.这种价值通过此一时期的话本小说可以反映出来.明代末期的地区社会与当时兴盛的商业经济有密切关系,那些商业经济又带动市镇的发展,而居于市镇的小市民就是话本小说中的主角,因此,话本小说能反映出当时市民的普遍的价值观和思想意识. 相似文献
5.
Previously we have designed and implemented new image browsing facilities to support effective offline image contents on mobile devices with limited capabilities: low bandwidth, small display, and slow processing. In this letter, we fulfill the automatic production of cartoon contents fitting small-screen display, and introduce a clustering method useful for various types of cartoon images as a prerequisite stage for preserving semantic meaning. The usage of neural networks is to properly cut the various forms of pages. Texture information that is useful for grayscale image segmentation gives us a good clue for page layout analysis using the multilayer perceptron (MLP) based x-y recursive algorithm. We also automatically frame the segment MLP using agglomerative segmentation. Our experimental results show that the combined approaches yield good results of segmentation for several cartoons. 相似文献
6.
This letter proposes a categorization matrix to analyze the playing style of a computer game player for a shooting game genre. Our aim is to use human-centered modeling as a strategy for adaptive games based on entertainment measure to evaluate the playing experience. We utilized a self-organizing map (SOM) to cluster the player's style with the data obtained while playing the game. We further argued that style-based adaptation contributes to higher enjoyment, and this is reflected in our experiment using a supervised multilayered perceptron (MLP) network. 相似文献
7.
L. DIANNE BORDERS KIM K. BLOSS CRAIG S. CASHWELL LESLIE MARTIN RAINEY 《Counselor Education & Supervision》1994,34(2):172-179
The scientist-practitioner model was taught to counseling students by giving them an opportunity to integrate theory, research, and practice via a process research case study. 相似文献
8.
从编委、稿源、语言、流通4个方面调查韩国学术期刊的国际化状况,考察NRF、KOFST、KISTI等机构促进学术期刊国际化的一些具体政策措施。研究结果表明:韩国学术期刊总的国际化水准还比较低,但编委国际化、流通国际化方面相对较好,医学期刊国际化水准相对较高;韩国基本形成了一个较为完备的促进学术期刊国际化的支持系统,其期刊国际化资助计划涵盖了期刊的投稿、审稿/编辑、发行、流通等全过程。根据韩国学术期刊国际化进程的经验教训,提出了中国学术期刊国际化路径的建议。 相似文献
9.
波动率是衡量股票指数收益变化的基本特征之一,诸多研究表明包含跳跃过程的模型能够较好的捕捉波动率的异常变动。在中国,学者们对股票市场的波动已有较深入的研究,但对包含跳跃过程的波动率模型的研究却很鲜见。本文在Chan and Maheu（2002）提出的GARJI-ND模型基础上建立了EGARJI-ND模型,并根据广义误差分布函数建立了GARJI-GED和EGARJI-GED模型,然后使用上海证券综合指数每日收盘数据对四个模型进行参数估计,最后比较四个模型的拟合效果。 相似文献
10.
Institutional affiliations and graduate school origins of current and past editors and editorial board members of Counselor Education and Supervision (CES) were investigated. 相似文献