现代社会和谐的理想：政治正义与个人自由的统一

现代社会和谐的理想是政治正义和个人自由的美好契合和有机统一。一方面，以人为本，实现个人自由全面的发展是一个公正社会的最后目的。为了公平正义的社会大可不必牺牲个人自由，同时，个人自由可以检验社会公正。另．一方面，作为自由主体的人发出对公共秩序的需求，政治正义能够提供一种普遍公正和持久稳定的生活秩序，满足人们对稳定生活的秩序期待，也就是说政治正义可以约束和范导个人自由。     

In vitro remineralization of hybrid layers using biomimetic analogs

Resin-dentin bond degradation is a major cause of restoration failures. The major aim of the current study was to evaluate the impact of a remineralization medium on collagen matrices of hybrid layers of three different adhesive resins using nanotechnology methods. Coronal dentin surfaces were prepared from freshly extracted premolars and bonded to composite resin using three adhesive resins (FluoroBond II, Xeno-III-Bond, and iBond). From each tooth, two central slabs were selected for the study. The slabs used as controls were immersed in a simulated body fluid (SBF). The experimental slabs were immersed in a Portland cement-based remineralization medium that contained two biomimetic analogs (biomineralization medium (BRM)). Eight slabs per group were retrieved after 1, 2, 3, and 4 months, respectively and immersed in Rhodamine B for 24 h. Confocal laser scanning microscopy was used to evaluate the permeability of hybrid layers to Rhodamine B. Data were analyzed by analysis of variance (ANOVA) and Tukey’s honest significant difference (HSD) tests. After four months, all BRM specimens exhibited a significantly smaller fluorescent area than SBF specimens, indicating a remineralization of the hybrid layer (P≤0.05). A clinically applicable biomimetic remineralization delivery system could potentially slow down bond degradation.     

虚拟现实系统中人机交互感官机理研究

探讨人机交互机理中感知系统模型和行为系统模型的基本原理与特点，总结出深入研究人机交互机理是实现虚拟现实人机交互的基础。同时指出人机交互感官机理研究有待进一步加强的方面。     

Differences in pedalling technique between road cyclists of different competitive levels

The purpose of this study was to compare the pedalling technique in road cyclists of different competitive levels. Eleven professional, thirteen elite and fourteen club cyclists were assessed at the beginning of their competition season. Cyclists’ anthropometric characteristics and bike measurements were recorded. Three sets of pedalling (200, 250 and 300 W) on a cycle ergometer that simulated their habitual cycling posture were performed at a constant cadence (~90 rpm), while kinetic and kinematic variables were registered. The results showed no differences on the main anthropometric variables and bike measurements. Professional cyclists obtained higher positive impulse proportion (1.5–3.3% and P < 0.05), mainly due to a lower resistive torque during the upstroke (15.4–28.7% and P < 0.05). They also showed a higher ankle range of movement (ROM, 1.1–4.0° and P < 0.05). Significant correlations (P < 0.05) were found between the cyclists’ body mass and the kinetic variables of pedalling: positive impulse proportion (r = ?0.59 to ?0.61), minimum (r = ?0.59 to ?0.63) and maximum torques (r = 0.35–0.47). In conclusion, professional cyclists had better pedalling technique than elite and club cyclists, because they opted for enhancing pulling force at the recovery phase to sustain the same power output. This technique depended on cycling experience and level of expertise.     

浅谈实践环节在教学过程中的重要性

从实践教学和理论教学的特点出发，通过分析两者间的关系，论述了实践教学在教学改革过程中的重要性，并指出教学过程中两者应相辅相成、取长补短。     

基于Pro/E的直齿锥齿轮Program参数化造型

介绍Pro/Engineer的Program参数化造型方法及其程序结构,并且以直齿锥齿轮为实例,详细地介绍Program参数化造型的实现过程。为同类产品实现参数化造型,减少重复劳动,提高设计效率提供一种适用、有效的方法。     

由“河堤决口了,洪水冲过来了”说开去

复句中的语义关系既是事物之间客观联系的反映,又是人们主观视角的反映。在事物之间的客观联系保持固定的情况下,人们的主观视角会随着认知需求的变化而变化。表现在复句中,则是适时添加复句关系词。并列范畴转化为因果范畴是人的特定视角的转化,这需要一定的客观条件,同时又必须有一定的认知作为前提。     

试论健美操运动对校园体育文化的影响

本文从健美操与校园体育文化两者的功能出发,探讨两者之间的关系。研究表明,健美操作为当代高校一种新兴的校园体育活动,不仅丰富了校园体育文化的内涵,同时对整个校园体育文化的发展方向和结构布局均有着重要的影响。反之,丰富多彩的校园体育文化活动是健美操运动赖以生存和发展的基础,两者相互依赖,相互促进,共同发展。     

李清照作品的女性特色

李清照是中国文学史上创造力最强、艺术成就最高的女性作家。综观李清照的作品,不仅题材丰富,其体裁更可谓诗词文赋兼擅,欢愉之作亦工,悲苦之篇尤胜。李清照作品的多姿多采,是其饱尝人间甘苦的人生所决定的。她的词不论是写少女的天真活泼,还是写少妇的相思、幽怨,抑或写老年嫠妇的凄苦境遇,无不表现出一种与众不同的情趣和韵味,令人回味无穷。她词作中所展现的女性情感世界,完美的艺术技巧,充分展示了其个性,揭示了女性生活中婉美、多情的一面,而且以其不同时期的作品,构成了一部女性情感历程的巨著。     

物理化学教学改革探索

原化学课程体系具有局限性，应确立并实行新的化学课程体系，对物理化学教学进行有益的教学实践。