英国文艺复兴时期诗人观念与文学发展形态     

吴毅  刘立辉 《淮阴师范学院学报(哲学社会科学版)》2011,33(5):663-668,700

161、7世纪是英国社会的转型时期,当时文人对诗人何为进行了严肃的追问。这种对诗人角色的追问规定了当时英国文学的诸种表现形态。文学的民族性、高雅性、娱乐性、宗教性,无不与英国文人对诗人的角色定位有关,体现了英国诗人力图通过文学参与政治、宗教、民族身份、个人生存诉求等诸问题的入世热忱,也彰显了英国诗人的艺术自觉意识,构筑了入世情怀和艺术自觉的英国文学传统。  相似文献   

聚丙烯结晶形态与力学性能及其疲劳稳定性     

石小丽  倪清兰  王飞 《实验室研究与探索》2011,30(12):38-41,59

基于Haake转矩流变仪,分别将α和β成核剂熔混到等规聚丙烯中以改变其结晶形态.用偏光显微镜法、X射线衍射法和力学性能测试方法研究了疲劳作用前后α晶和β晶相互转变及其结构性能.实验结果表明:α成核剂在降低球晶尺寸和增加结晶度同时,在晶胞内产生了内应力,在疲劳初期,结晶应力消除、拉伸强度增加,继续疲劳时,结晶度和拉伸强度都下降,疲劳后,β含量相对增加.当β成核剂用量较少时,β晶含量增加,拉伸强度降低;在β晶结晶度适中时,疲劳并不改变晶胞结构与结晶度,表现较好的耐疲劳性;结晶度较高时,疲劳降低了结晶度,但拉伸强度有所增加.  相似文献   

Effects of elevated CO(2) levels on root morphological traits and Cd uptakes of two Lolium species under Cd stress     

Jia Y  Tang SR  Ju XH  Shu LN  Tu SX  Feng RW  Giusti L 《Journal of Zhejiang University. Science. B》2011,12(4):313-325

This study was conducted to investigate the combined effects of elevated CO₂ levels and cadmium (Cd) on the root morphological traits and Cd accumulation in Lolium multiflorum Lam. and Lolium perenne L. exposed to two CO₂ levels (360 and 1 000 μl/L) and three Cd levels (0, 4, and 16 mg/L) under hydroponic conditions. The results show that elevated levels of CO₂ increased shoot biomass more, compared to root biomass, but decreased Cd concentrations in all plant tissues. Cd exposure caused toxicity to both Lolium species, as shown by the restrictions of the root morphological parameters including root length, surface area, volume, and tip numbers. These parameters were significantly higher under elevated levels of CO₂ than under ambient CO₂, especially for the number of fine roots. The increases in magnitudes of those parameters triggered by elevated levels of CO₂ under Cd stress were more than those under non-Cd stress, suggesting an ameliorated Cd stress under elevated levels of CO₂. The total Cd uptake per pot, calculated on the basis of biomass, was significantly greater under elevated levels of CO₂ than under ambient CO₂. Ameliorated Cd toxicity, decreased Cd concentration, and altered root morphological traits in both Lolium species under elevated levels of CO₂ may have implications in food safety and phytoremediation.  相似文献   

电视声画关系再论——兼与何国平商榷     

廖建国 《福建工程学院学报》2012,(2):193-195,199

电视声画研究是近30年来的一桩学术公案。在人们探讨和交锋中至少涌现出几种不同观点。论文试图对此重新厘析,指出了主声、主画或结合等说的症结所在,认同形态说关于双主体结构观点,同时对这一说存在的疑问与相关人进行商榷。  相似文献   

Effect of Dental Course Cycle on Anatomical Knowledge and Dental Carving Ability of Dental Students     

Ademar Fonseca  Victoria B. da S. Guimarães  Sinval A. Rodrigues-Junior  Alisson A.R. Fonseca  Renato A. de Azevedo  Marcos B. Corrêa  Rafael G. Lund 《Anatomical sciences education》2022,15(2):352-359

This study assessed the effect of the course cycle on theoretical knowledge of dental morphology and the dental carving ability of dental students. Thirty-two dental students from the third semester (initial cycle) and 30 students from the eighth and tenth semesters of the dental course (end cycle) had their theoretical knowledge on dental morphology assessed using a questionnaire with ten closed questions. Their dental carving ability was also assessed using wax carvings in macro models of plaster (for the third [S3] and eight [S8] semesters) and natural-sized artificial teeth (for the tenth [S10] semester). The teeth chosen for the dental carving activity were #16 and #47. The scores were statistically analyzed using the t-test, Kruskal–Wallis test, and Mann–Whitney test (α = 0.05). Students from the initial cycle presented better theoretical knowledge than the other groups did (P < 0.007). No significant differences in carving score were found between the initial and end cycles (P > 0.05), although S10 students obtained a higher score for teeth #16 and #47 (P < 0.05). Natural-sized artificial teeth received a higher evaluation score in dental carvings than the macro models (P < 0.001). Within the limits of this study, it was possible to conclude that students from the initial cycle (S3) presented higher theoretical knowledge, whereas no difference in carving ability was observed between the initial and end cycles. The tenth semester (S10) students performed dental carvings with better quality. Furthermore, carvings in natural-sized artificial teeth presented better quality compared with the macro models.  相似文献   

Modeling of contact surface morphology and dust particles by using finite element method     

WANG Dong XU Liang-jun 《浙江大学学报(A卷英文版)》2007,8(3):403-407

The effect of dust particles on electric contacts and a hazardous size range of hard dust particles using a rigid model were discussed before. As further research, elastic-plastic model of finite element analysis was established in this work, which is closer to real condition. In this work, the behavior of large size and small size particles, and the influence of particles hardness were investigated. The calculating result of small-size particles presents a general hazardous size coefficient for different contact surface morphology; for large-size particles, it presents a hazardous size coefficient for complicated composition of the dust. And the effect of the dust shape is also discussed.  相似文献   

Factors influencing the outcome of embryo freezing and thawing program     

叶英辉  金帆  徐晨明  邢兰凤 《浙江大学学报(A卷英文版)》2002,3(4):493-496

Objective: To investigate the factors that might influence the success of an embryo freezing and thawing program. Method: The relationship between the pregnancy rate in 73 cycles of embryo, freezing and thawing program and the following factors was analyzed: maternal age,E ₂ level at the time of HCG trigger, embryo storage time, number of thawed embryos transferred, presence of sponsoring embryos and intact embryos. And the survival rate of thawed embryos with different morphology, cell stage and storage time was evaluated. Result: Transfer with three or more than three thawed embryos resulted in pregnancy rates of 38.5% and 35.7%, respectively, compared with 5.3% for transfer of fewer than three embryos. The presence of sponsoring embryos and intact embryos significantly increases pregnancy rate in embryo freezing and thawing program. No other factor examined had any effect on pregnancy outcome. The survival rate of good morphology embryos was higher than poor ones, but was not influenced by cell stage and storage time. Conclusion: Embryo morphology before freezing, number of thawed embryos transferred and the presence of intact embryos are important to the outcome of embryo freezing and thawing program.  相似文献   

汉语词汇的网络性与对外汉语词汇教学   总被引：14，自引：2，他引：14  

常敬宇 《暨南大学华文学院学报》2003,(3):13-18,45

本文重点探讨汉语词汇的词形和词义的内部规律，即汉语词汇的词形结构网络性和词义联想网络性。如果让外国学生掌握了这些词汇网络性特点，不仅能使他们认识汉语词汇的结构特点和词汇的生成规律，而且可以加深他们对汉语词汇语义文化内涵的理解，从而可提高对外汉语词汇教学的质量和效果。  相似文献   

Optimizing quality of dental carving by preclinical dental students through anatomy theory reinforcement          下载免费PDF全文

Renato A. de Azevedo  Marcos B. Correa  Marcos A. Torriani  Rafael G. Lund 《Anatomical sciences education》2018,11(4):377-384

Knowledge of dental anatomy is of great importance in the practice of dentistry, especially in oral rehabilitation, because without this knowledge, professional practice is not possible. Dental carving plays a major role in training dental students as it develops their manual dexterity. This randomized controlled trial aimed to evaluate the influence of didactic‐theoretical reinforcement on the theoretical and practical knowledge of dental anatomy of preclinical students by examining the quality of the anatomical restorations performed by these students before and after a didactic‐theoretical reinforcement. For the evaluation of theoretical knowledge, a questionnaire with closed questions about dental anatomy was used. To evaluate the effect of didactic reinforcement on dental carvings, two groups of 15 preclinical students were assessed. Experimental group (G1) received a three‐hour theoretical tutoring on dental anatomy, while the control group (G2) did not. The dental carving scores obtained by the two different groups were compared using Student's t‐test. Cohen's d was used to estimate the effect sizes between groups. The frequency of correct answers given for each theoretical knowledge question was compared in each group using Fisher's exact test. T‐test was also used to compare the means of the two groups' final scores of theoretical evaluations. To compare these final scores obtained in both carving and theoretical tests, a principal component analysis was performed with different items assessed in each test to obtain factor loading scores and a final weighted score, where factor loadings were considered for each item. Weighted scores were compared using t‐test. Also, scores obtained during the head and neck course were assessed and compared using t‐test. Spearman's correlation test was used to assess the correlation between scores obtained prior to the anatomy course and scores obtained in the dental carving exercise. The theoretical evaluation revealed no significant difference between the grades (mean ± SD) of G1 (85.1 ± 6.6%) and G2 (86.2 ± 9.1%) with the grades of a baseline test that was previously obtained when students submitted to the study (P = 0.725). Regarding the tooth carving assessment, the dental carving quality by students of G1 has significantly improved, except for tooth #23 (P = 0.096). Theoretical reinforcement of dental anatomy seems to improve the students' carving performance but does not enhance their knowledge about dental anatomy. Anat Sci Educ 11: 377–384. © 2017 American Association of Anatomists.  相似文献   

行业语的社会化及其对共同语的影响     

盛光希 《湖南城市学院学报》2005,26(6):44-46

行业语的社会化是社会需要选择和语言内部要素变化共同作用的产物。行业语社会化的具体形态,在形式上表现为字词的增减或转换,在内涵上表现为语义的稳定或泛化。这种形态的复杂性决定了其对共同语影响的多样性。  相似文献