英汉商标语的误译现象

随着经济全球化的发展,中国市场逐步与世界市场接轨。商标作为经济发展的产物,被广泛地应用于现实生活中。因此,商标语的翻译引起了越来越多的人的关注和研究。本文指出了英汉商标语在翻译中出现的误译现象,提出了正确的翻译原则。     

高校图书馆占座问题的动态博弈分析

通过建立自习读者之间的静态博弈模型,分析了图书馆占座现象产生的原因;通过建立图书馆与读者之间的动态博弈模型,分析了在图书馆占座现象管理中图书馆与读者的行为选择,对图书馆占座现象的管理提出了一些建议。     

张学良东北易帜原因新探——基于张学良口述史料的研究

东北易帜是张学良亲掌东北权柄后作出的一项重大抉择。张学良本人的口述史料清晰地再现其东北易帜时的心理活动,从崭新的角度揭示了其东北易帜的原因：顺应民族自救、国家统一的时代主流;能力远不及父亲,应付不了当时复杂的局面,主要是应付不了日本人的纠缠;渴望祖国统一,从无思求地盘之心;日本炸死父亲,国仇家恨加重了易帜的决心。     

Surface pollen assemblages of human-disturbed vegetation and their relationship with vegetation and climate in Northeast China

Pollen assemblages of 53 surface pollen samples from farmlands and wastelands in Northeast China were analyzed. Tree pollen percentages were usually higher than 30%, with Pinus (26.9%), Quercus (0.9%), Betula (0.9%) and Populus (0.7%) as the major types, and herb pollen percentages were usually higher than 50%, with weedy Poaceae (8.7%), Chenopodiaceae (7.1%), Artemisia (1.9%) and Compositae (3.5%) as the major taxa. Thus, the pollen assemblages were consistent with the regional vegetation compositions. However, there were differences in pollen assemblages among regions, especially among different geomorphological units. For example, in the mountains, there were more types of tree pollen and higher total percentages (average 42%) than in other areas, while cereal pollen percentages were lowest (11.2%). In the hills and high plains, herbs made up more than 60% of the pollens, with cereals (average 53.6%) the dominant type. In the low plains, pollen types were similar to those in the hills and high plains, but total pollen concentrations and the proportion of Concentricystes were much higher, while cereal pollen percentages were slightly lower (average 41.6%). Pollen assemblages in different land use types also differed. For example, in farmland, cereal pollen percentages were more than 40% and Chenopodiaceae was usually less than 2.5%, while in wasteland, weedy Poaceae was usually less than 10% and Chenopodiaceae was usually higher than 25%. Total pollen concentrations in farmland (average 3909 grains/g) were much lower than in wasteland (average 15074 grains/g). Redundancy analysis revealed that pollen assemblages were significantly negatively correlated with mean annual temperature (-0.73) and July mean temperature (-0.81) and significantly positively correlated with mean annual precipitation (0.48), indicating that pollen assemblages in the artificial or human-disturbed vegetation reflect regional climate well. Comparison of pollen assemblages in different areas of northern China showed that pollen concentrations reflect the intensities of human impact to some degree. For example, pollen concentrations decrease as human impacts increase in intensity. The cereal pollen proportions in farmland differed by area. In Northeast China, cereal pollen proportions were distinctly higher than in most other areas of northern China, suggesting differences in planting habits and climate.     

特异材料与卡西米尔(Casimir)效应

对平板结构情况下卡西米尔(Casimir)效应的理论研究进展进行了综述, 特别对排斥型卡西米尔力的研究做了较详细的介绍. 随着近年来特异材料(metamaterlas)研究与制备技术的快速发展, 人们可以通过人工电磁微结构对材料的电磁特性进行控制, 从而为获取卡西米尔排斥力以及回复力创造了条件. 相关基础研究的成果将在微纳机电系统方面具有广阔的应用.     

离散剪切约束的4节点矩形弯曲单元

提出一种基于Ｍｉｎｄｌｉｎ理论的４节点矩形薄板单元，该单元满足应变能正交准则下的收敛性充要条件，具有插值方式简单和相当二次数值精度等优点。在避免单元剪切自锁中，引入较严格沿单元边界法向剪切应变约束处理技术，使单元具有真实Ｋｉｒｃｈｈｏｆｆ单元的变形特点。     

Kolmogorov生态系统的浑沌现象

本文在Kolmogorov生态系统的基础上,研究当b_(12)≠0,c_(12)≠1,且内禀增长率为r_1=f+ε(λ_1+λ_2cosωt)r_2=f+ε(λ_1+λ_2cosωt)受到ελ_3cosωt的强迫激励时所产生的浑沌现象。     

SOUND RADIATION FROM PLATES ON ELASTIC FOUNDATION UNDER ACTION OF MOVING LINE FORCES

An analysis is made of the problem of sound radiation from infinite one-dimensional plateson elastic foundation, when the plates are subjected to the action of harmonic line forces movingat subsonic speeds (M < 1). The expressions of nondimensional sound power are formulated andthe asymptotic forms of sound power in the low frequency regions are derived. The radiatedsound power is shown as a function of the stiffness of elastic foundation, in terms of stiffness fac-torψ, the moving speed of line force, in terms of Math number M, and the frequency, in termsof wavenumber ratio γ . The effects of the parameter ψ in conjunction with the parameters Mand γ on the radiated sound power level and the phenomenon of coincidence radiation are alsoinvestigated in detail.     

中国鱼洗喷水原理研究

喷水鱼洗是中国的稀世文物。本文用物理学原理对鱼洗的喷水现象作了解释,并设计了鱼洗的粉图实验。同时,还作了三种普通水盆的模拟实验比较,指出:凡是厚薄均匀、弹性较好、直径适当的薄圆形盆器,都可以通过手掌对它的摩擦起振产生喷水现象。     

三十烷醇乳剂配制技术及其机理的研究

三十烷醇是一种新型的植物生长调节剂,本文研究了三十烷醇乳剂的最佳配制条件,采用二次热水配制法,二次水温均为84℃—86℃,近千次实验表明,使用效果很好,本法制备快速,简易,适用于农村大面积大量配制,且乳剂质量稳定,能长期保存,适用于提前配制。