南方红豆杉木材解剖特征研究

通过对南方红豆杉木材宏观、显微构造及管胞长度分布频率的研究,并与国产红豆杉属其他种木材进行对比.结果表明,南方红豆杉木材构造特征与红豆杉属其它种的木材十分近似,但在早晚材变化缓急、木射线细胞组成及早材交叉场纹孔类型与紫杉明显不同;南方红豆杉管胞弦向宽度与红豆杉和云南红豆杉相近,但长度较短,紫杉管胞则比南方红豆杉粗短;南方红豆杉管胞长度分布频率早晚材均呈正态分布;天然林的南方红豆杉管胞长度比人工林的明显要短.     

徽州古民居雕饰艺术在现代服饰设计中应用方法探讨

徽州古民居雕饰艺术表现为思想与文化相结合、实用与装饰相结合以及朴素简洁与清丽淡雅相结合的特征。通过其关学思想、图案装饰、造型装饰、工艺装饰等艺术表现形式,结合设计实例,分析得出徽州古民居雕饰艺术在现代服饰设计中应用方法,包括模仿法、解构重构法、嫁接法和极限法,是设计和开发具有“徽派”风格特点的现代服饰及服饰产品的有效方法和途径。     

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

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.     

科技助力智能健身:发展机遇、实践经验与案例启示——基于乐刻运动的分析

运用案例分析、文献资料等研究方法,分析了科技助力智能健身的发展机遇以及乐刻运动对科技助力智能健身的实践经验与相关启示。研究表明:O2O健身模式、IOT智能设备、SAAS管理系统、大数据等科技都助力了智能健身的发展。乐刻运动更是利用O2O平台、大数据、新零售模式、智能运动设备、连锁+融资模式成为我国业内科技助力智能健身的典范。基于乐刻运动的案例分析,借鉴其实践经验,提出如下启示:线上线下双轮驱动,突破智能健身发展瓶颈;硬软件迭代升级,夯实智能健身发展基础;调整服务产业结构,延伸智能健身服务价值链;精准定位消费人群,实现健身消费升级。     

基坑施工木板桩法防治流砂

在开挖底面低于地下水位的基坑时，有时会发生流砂现象。造成严重后果。为此如何防治流砂成为基坑土方施工需要解决的一个技术难题。根据工程实例，分析流砂产生原因和条件。探讨有效的防治措施和有关技术问题。     

徽州建筑中的木雕艺术

在徽州,木雕以它优美的形式附着于建筑物,成为优美的装饰。它的存在既是为了美化,给人以艺术的熏陶,陶治人们的情操,又要考虑实用,有利于建筑物和家具的坚实耐用,故在选择材料、确定内容、进行构图时,都要立足于装饰角度来思考题材的表现手法。     

Optimizing quality of dental carving by preclinical dental students through anatomy theory reinforcement

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.     

灯台树根的木材解剖学研究

灯台树(cornus controversahemsl)别名女儿木,属山茱萸科山茱萸属植物[1].落叶乔木,高10~15m.原产于我国长江流域及西部各省,在我国各地可广泛栽培,北起东三省,南至两广至台湾,西达中亚边境,东至朝鲜半岛,均可良好生长.灯台树的自然群落分布于海拔400~1800m的林缘或溪畔.灯台树     

从废木屑制取草酸工艺的研究

研究了以废木屑为原料 ,用氧化法制取草酸的工艺方法 ,确定了最佳工艺条件 :10 .0g废木屑、12mL5 0 %H2 SO4、6mL6 5 %HNO3 、0 .3g催化剂在 6 5°C下制得草酸的产率达 4 1.4 % .     

基于数字化平台的徽雕文化遗产的传播与传承

传统的徽雕艺术是徽州文化重要的符号之一。现今,徽雕艺术面临着难以生存和发展的严峻现实。本文着力思考数字技术为徽雕艺术的生存与发展所带来的新机遇,探索徽雕艺术与数字技术深度融合之道,使数字化、网络化成为"活态"保护、传播和传承徽雕文化遗产的最佳途径。