锅柄的改良性设计

作为人机界面的锅柄,是锅具设计的重要环节.人操持锅柄的方式、姿势及舒适度,受制于锅柄的形态.通过对锅柄操作方式的解析,综合人机工程学、审美、技术与市场等多方面因素,辅以模型制作与实验等方法,获取了握柄类产品设计的成功经验.     

基于DSPs的运动目标检测与匹配

建立了一个基于TMS320C6701的DSPs系统,实现复杂背景中单个运动目标的实时跟踪.同时给出在复杂背景下人物自适应跟踪的实验结果.在这基础上,结合运动目标检测技术和模板匹配法,讨论一个复杂背景下多运动目标自适应跟踪系统,同时也给出运动目标检测和模板匹配的实验性结果.     

基于任意拉格朗日-欧拉法的盾构刀盘土体切削仿真

针对盾构刀盘切削土体的问题,提出了基于有限元和高性能计算方法的大规模数值模拟方法.建立了盾构和土体的三维分析模型,并且充分考虑到土体的材料非线性,利用动态显示算法进行了基于国产“曙光4000A”高性能计算机的大规模流固耦合分析.仿真采用任意拉格朗日-欧拉法(ALE),解决了土体大变形造成的有限元单元畸变问题,预测土体-刀具相互作用的过程;将修正的Drucker-Prager塑性土体模型作为土体的非线性有限元模型,其仿真方法和结果可以为未来盾构机的刀盘设计提供参考.     

泛图像时代的视觉文化素养教育探微

世界已经进入了图像时代。由于在图像传播的过程中，信息编码和解码关系的不对称，导致了受众面临前所未有的信息接收困境。如何破解这一难题，提高受众的视觉文化素养是当务之急。文章试图从传播学的视角对这一问题进行解析探讨。     

"钦天监教案"起因探析

"钦天监教案"是清初多种矛盾激化的必然产物一、中西历法之争最后演化为"夷夏之辨"的政治斗争,给辅政大臣铲除政敌提供了借口;二、天主教势力的迅猛发展威胁到佛教的传统地位,使两教矛盾激化;三、汤若望在政治上的巨大成功损害了一部分满清权贵的政治利益;四、传教士内部的内讧给反汤若望势力可乘之机;五、汤若望成为辅政大臣清算"汉化"思潮的牺牲品.     

改造普通车床加工电解槽阳极导杆

介绍了改造普通车床加工电解槽导杆的必要性及其方法,研究并分析了车床改造及装夹装置、支架、刀盘的结构、原理及使用效果和注意事项,对同类生产企业具有借鉴作用。     

论同情

欧洲近代关于同情的论述翔实而丰富,从同情的周围域、同情的对象与发生以及同情的结构三方面对“同情”的诠释,可以开启一些对人们来说早已淡忘或者很少提及的问题的再思考,其中中国古代的理论的运用旨在进一步阐发“同情”三个不同层面的相互关联。     

Characteristics of climatic trends and correlation between pan-evaporation and environmental factors in the last 40 years over China

Using the data observed by 62 Chinese Routine Meteorological Stations (CRMS) with long term radiation observation, the climatic trends and the relationship between pan-evaporation and its environmental factors are analyzed comprehensively. The results show that during the last 40 years, the relative humidity is uptrend in west China, downtrend in east China, and their extrema are 0.20%/a and -0.22%/a respectively; the precipitations of about 61% CRMS keep uptrend, its maximum can reach 10.52 mm/a^2 while the cloud amounts of about 79% CRMS keep downtrend slightly. About 98% CRMS display the air temperature uptrend, and the maximum is 0.11℃/a. About 76% CRMSdisplay the land surface temperature uptrend. About 87% CRMS show the daily range of temperature downtrend. The global radiations observed by about 85% CRMS and the 10 m wind speeds observed by about 77% CRMS hold downtrend. The annual pan-evaporations of about 66% CRMS hold descend trend, and the biggest descent reaches -24.9 mm/a^2. The pan-evaporation has good relationship with many environmental factors, but the relationship with the relative humidity is the best. All of the climatic trends respond to the global climate changes.     

Arbuscular mycorrhizal formation of crucifer leaf mustard induced by flavonoids apigenin and daidzein

Flavonoids from legume root secretion may probably act as signal molecules for expression of Rhizobial “nod” nodulation genes and AM fungal symbiotic gene. Leaf mustard is a non-mycorrhizal plant; it does not contain flavonoids and other signal molecules. AM fungi could not infect the roots of leaf mustard and form a symbiont in nature,when it was treated with flavonoids (apigenin or daidzein).The results of trypan blue staining showed that two kinds of AM fungi (G intraradices and G mosseae) successfully infected the roots of non-mycorrhizal plant leaf mustard. AM fungi grew towards and colonized the roots of leaf mustard,producing young spores and completing the course of life.AM fungi are the only one kind of fungi with ALP activity.The result of ALP staining has also proved that AM fungi infected successfully the roots of leaf mustard. AM fungi (G intraradices and G mosseae) that existed in the roots of non-mycorrhizal plant leaf mustard were probed by nested PCR and special molecular probes. The above-mentioned proof chains have fully proved that flavonoids induced AM fungi (G intraradices and G mosseae) to infect non-mycorrhizal plant and establish symbiotic relationship.     

土壤一维垂直入渗控制界面的试验研究

基于不同土壤结构条件下的大田土壤水分入渗试验,通过分析对比结构良好表层土壤(容重在1.2~1.4 g/cm3之间)与特别疏松的表层土壤(容重在1.0~1.2 g/cm3之间)入渗率过程的特性和差异,揭示了土壤稳定入渗控制界面下移的现象。在对土壤的干容重与稳定入渗率之间的关系进行分析的基础上,确定了不同表层土壤结构条件下的入渗控制界面的位置。研究结果表明,结构良好的土壤的入渗控制界面在表层,特别疏松的土壤的入渗控制界面则在犁底层;入渗控制界面在表层的入渗属于无压入渗,入渗控制界面在犁底层的入渗属于非饱和土壤的有压入渗。