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31.
32.
Perceptions of organisational culture made by three categories of staff playing managerial roles in each of two Portuguese
Universities (one public and the other private) were compared using a questionnaire adapted from the Organisational Culture
Assessment Instrument and translated into Portuguese. The four scales of the questionnaire, designed to measure the Cultures
of Clan, Adhocracy, Hierarchy and Market orientation were found to have adequate internal reliabilities, though a factor analysis
raised doubts about the construct (factor) validity of two of the scales (Clan and Adhocracy). Application of a MANOVA to
scores on the four scales of organisational culture showed, as hypothesised, that the private university was perceived to
have significantly stronger cultures of Market orientation and Hierarchy than the public university. No overall difference
was found between the universities for the cultures of Clan and Adhocracy. However, general managerial staff in both Universities
perceived the cultures of Clan and Adhocracy to be stronger than was the case for technical managerial staff. 相似文献
33.
Ce-ZrO2 and ZrO2/CePO4 ceramic system was joined in the green body by using mixed powder. Three kinds of systems are discussed. The microstructure and bending strengths of the joint were investigated and it is found that the Ce-ZrO2 and 30%CePO4/ZrO2 ceramics can be well joined in the green body. A joint with high mechanical property and good microstructure can be obtained after sintering without applied pressure. Complexly shaped ceramic components can be created by the technique of green state joining. A new way to produce them is provided and the cost is reduced due to the simplicity of the process. 相似文献
34.
Influence of soaking time on semi-conductivity and nonlinear electrical properties of TiO2-based varistor ceramics 总被引:1,自引:0,他引:1
We investigated the influence of soaking time on the semi-conductivity and nonlinear electrical properties of TiO2- based varistor ceramic samples. We used a single sintering process and fabricated six disk samples of (Sr, Bi, Si, Ta)-doped TiO2- based varistor ceramics sintered at 1 250℃ for 0.5 h, 1.0 h, 2.0 h, 3.0 h, 4.0 h, and 5.0 h, respectively. The samples were characterized by X-ray diffraction, breakdown voltage, and complex impedance. The results show that as the soaking time increases from 0.5 h to 5.0 h, the breakdown voltage drops before rising while the nonlinear coefficient increases and then decreases. We suggest that, considering both grain semi-conductivity and nonlinear electrical properties of the TiO2-based varistor ceramics, the optimal soaking time is between 2.0 h and 3.0 h. 相似文献
35.
BiFeO3是一种典型的铁磁电材料,因在室温下同时具有铁电性与磁性而在新型存储器件、磁电传感器和自旋电子器件等方面具有很大的应用前景,人们从理论和实验上不断地进行探索.在对比分析现有资料的基础上,综述研究国内外在该领域取得的成果,以理清新近在BiFeO3基铁磁电陶瓷材料制备、性能等研究工作的进展. 相似文献
36.
《Information processing & management》2022,59(1):102794
The exploration of legal documents in the Brazilian Judiciary context lacks reliable annotated corpus to support the development of new Natural Language Process (NLP) applications. Therefore, this paper presents a step toward exploring legal decisions with Named Entity Recognition (NER) in the Brazilian Supreme Court (STF) context. We aim to present a case study on the fine-grained annotation task of legal decisions, performed by law students as annotators where two levels of nested legal entities were annotated. Nested entities mapped in a preliminary study composed of four coarser legal named entities and twenty-four nested ones (fine-grained). The final result is a corpus of 594 decisions published by the STF annotated by the 76 law students, those with the highest average inter-annotator agreement score. We also present two baselines for NER based on Conditional Random Fields (CRFs) and Bidirectional Long-Short Term Memory Networks (BiLSTMs). This corpus is the first of its kind, the most extensive corpus known in Portuguese dedicated for legal named entity recognition, open and available to better support further research studies in a similar context. 相似文献
37.
用DTA、XRD、SEM等手段研究了Bi_(0.7)Pb_(0.3)Sr Ca Cu_x O_y(x=1.6,1.8,2.0,2.2,2.4)系统微晶玻璃的品化过程、晶相组成和晶体形貌,详细讨论了CuO对该系统高Tc超导相2223、2212形成以及对超导性能的影响.研究结果表明,CuO含量增加有利于超导相的形成,且随着CuO含量增加,在CuO=2.0mol附近,该系统超导性能呈现最佳值. 相似文献
38.
The present study investigates Ehri's (Ehri & Wilce 1985; Scott & Ehri 1990) hypothesis that knowledge of the alphabet enables children to learn to read by processing and storing letter-sound relations in words. In particular, it examines whether letter-name knowledge facilitates the learning of spellings in which the names of one or more letters can be heard in the pronunciation of the words. Preschool children who could not read any word out of context were divided into two groups on the basis of their ability to name the letters of the alphabet: one group knew the names of the letters while the other did not. Both groups were taught to read two types of simplified spellings: visual spellings, that is, spellings whose letters did not correspond to sounds in the pronunciations of the words but which were visually more salient (e.g., XQKO for the word cerveja), and phonetic spellings, that is, spellings whose letters corresponded to sounds in the pronunciation of the words (e.g., CRVA for the word cerveja). In all phonetic spellings, the name of at least one letter could be clearly heard in the pronunciation of the words. Results corroborated Ehri's hypothesis. The children who did not know the names of the letters learned to read the visual spellings more easily than the phonetic ones. On the other hand, the children who knew the names of the letters showed the opposite pattern, that is, they learned the phonetic spellings more easily than the visual ones. 相似文献
39.
吴立君 《开封教育学院学报》2002,22(1):35-36
本文通过对现代陶艺形象的分析,揭示了现代陶艺神秘性的特征、表现方法及其产生的原因.为熟练掌握陶艺的特殊语言,拓宽创作思路和灵感,更好地展示现代生活的内涵与意义进行了有益的探讨. 相似文献
40.
Ground textures seriously interfere with the exact identification of grinding damage. The common nondestructive testing techniques for engineering ceramics are limited by their difficulty and cost. Therefore, this paper proposes a global image reconstruction scheme in ground texture surface using Fourier transform (FT). The lines associated with high-energy frequency components in the spectrum that represent ground texture information can be detected by Hough transform (HT), and the corresponding high-energy frequency components are set to zero. Then the spectrum image is back-transformed into the spatial domain image with inverse Fourier transform (IFT). In the reconstructed image, the main ground texture information has been removed, whereas the surface defects information is preserved. Finally, Canny edge detection is used to extract damage image in the reconstructed image. The experimental results of damage detection for the ground texture surfaces of engineering ceramics have shown that the proposed method is effective. 相似文献