天门冬药理与临床应用研究进展

天门冬药用价值高、作用明确、毒副作用少,是一种重要的药用植物,为多个民族的常用药,极具开发前景.综述了目前天门冬药理作用与临床应用的研究进展,并对未来的研究作了展望.     

关于对教育装备管理现状的思考

随着现代社会提倡素质教育的观念越来越浓厚,与之配套的教育装备成为了人们所关注的话题,所谓的教育装备指的是那些为教育任务所服务的所有物品的总称,教育装备的两项重要内容是教育的目的性和有效性,教育装备的主要工作就是围绕着教育工作而展开的,主要是为了满足教育所需。信息技术和多媒体成为教学中非常重要的辅助工具,成效明显。但由于各种原因,对装备的维护管理还跟不上,有很多问题需要解决,本文指出了教育装备管理存在的一些问题,并针对这些问题进行思考,提出了一些切实可行的解决方案。     

民间美术与天地鬼神

民间美术始于原始巫术，生成于人类蒙昧时期，是一切造型艺术的原始母体。民间美术长期以来相伴是地鬼神观念、使役于宗教和封建迷信。它通过艺术形象的描绘，表达对不可知的神灵精神的敬畏与祈求，也借助天国境界寄托某种理想观念，或借助神灵驱邪扼鬼，更有利用神话传说、民间故事的描绘歌颂祥和美满的生活及劳动与爱情。其间亦有不少警喻劝世的充满人情味的作品。民间美术的美学价值就在于它的人本精神的表达。     

西藏高原植物区系中特有属的研究

The Xizang (Tibetan) flora with numerous endemics is of importance in Chi- nese flora.   According to recent statistics there are in Xizang 27 genera of  spermatophytes endemic to China, being only 2.25% percent of the total number of genera in the Xizang flora. Four of them are regarded as palaeoendemics (14.81%) and the others as neoendemics (85.19%). These endemic genera, of 30 species and 3 varieties, belong to 17 families, of which, Umbelli- ferae contains 6 genera, 7 species and 3 varieties; Compositae has 6 genera and 7 species, and Gentianaceae 1 genus and 2 species.  All the other families each comprises one genus with a single species.       The cosmopolitan families together comprising 14 genera with 15 species have the highest perecentage (52.92%) and the tropical ones (5 families, 5 genera with 5 species) come to the next (29.42%), followed by the temperate ones (3 families, 10 genera with 10 species) (17.66%). It shows that these endemic genera are obviously related to the tropical flora and temperate one in essence.        According to the number of species, the genera endemic to China and occurring in Xi- zang flora may be grouped as fallows. Monotypic endemic ones 14 (51.85%) Ditypic endemic ones 6 (22.22%) Oligotypic endemic ones 4 (14.81%) Small endemic ones 3 (11.11%)        The formation of the endemic genera is correlated with the topography, climate and en- vironmental conditions, and they may have resulted from the diversification in geography and climatic influence for a long time.  The southeastern part of Xizang Plateau is of very diverse ecological conditions, with the adequate precipitation, which may explain the concentration of these endemic genera in this region.        The largest similarity coefficient (38.30%) of the genera endemic to China and occurring in Xizang is with those in Qinghai Plateau, next, with those in Yunnan and in Sichuan pro- vinces (both 27.60%), which shows that these endemic genera are related to the floras of the regions mentioned above.        The difference in the horizontal distribution of these endemic genera is obviously between the southern and northern parts of Xizang Plateau.  The vertical distribution of the genera is also rather obvious, from 800 m to 5200 m above sea level, but concentrated in the zone of 3000 m to 4500 mm.  Therefore their occurrence in Xizang is not only affected by the historical environmental conditions but also controlled by the horizontal and vertical distribution.      The origin and evolution of some endemic genera, such as Psammosilene, Parateropyrum, Sphaerotylos, Salweenia, Ajaniopsis, Xizangia, Sinoleontopodium, are discussed in this paper.      Parateropyrum, a monotypic palaeotropic endemic, belongs to the tribe Atraphaxideae in- cluding Atraphaxis, Calligonum and Pteropyrum.  It may be a comparatively advanced group in the tribe, and is closely related to the genus Pteropyrum  which is  distributed in western Asia.  The genus Parapteropyrum has possibly survived as a palaetropic-tertiary  relic in this region.      Sphaerotylos, a member of the subtribe Sphaerotylinae, the tribe Boehmerieae in the family Urticaceae, is a comparatively primitive genus in the tribe Boehmerieae so far known.  As the other subtribes, such as Boehmerinae, Sarconchlamydinae, Orecnidinae and Maoutinae, are dis- tributed in the tropics, rarely in the subtropics, the genus is no doubt a palaetropic -tertiary relic.      Sinoleontopodium, belonging to the tribe lnuleae in Compositae, is also related to the ge- nus Leontopodium.  It is probable that the genus Sinoleontopodium arised later than the other.       We come to the conclusion that the southern part of Xizang Plateau is also one of thecentres of the origin and differentiation of genera endemic to China.     

Walsh Operational Matrices for Fractional Calculus and Their Application to Distributed Systems

The Walsh operational matrix for performing integration and solving state equations is generalized to fractional calculus for investigating distributed systems. A new set of orthogonal functions is derived from Walsh functions. By using the new functions, the generalized Walsh operational matrices corresponding to √s, √(s²+ 1), e^-s and e^-√s etc. are established. Several distributed parameter problems are solved by the new approach.     

肝肾疾病患者血清转铁蛋白和铜蓝蛋白含量的分析

对肝肾疾病进行转铰蛋白(Transferren简称TF)和铜蓝蛋白(Ceruloplasmin简称CP)测定,结果表明:各组肝炎病人的TF均显著低于正常组,且谷丙转氨酶异常和HBsAg阳性者TF含量明显低于正常者,TF可作为判断肝病预后的一个指标。肾炎病人的TF也比正常人低,CP含量各组不一,肝癌患者的CP(52.44±8.73mg％)显著高于正常人(46.75±7.92mg％),乙型肝炎病人和正常组间未见差异.肝豆状核变性患者CP非常显著低于正常人,故检测CP有助于鉴别肝硬化和肝癌,同时对临床诊断肝豆状桉变性提供一项可靠的客观指标.     

图书情报现代技术与人机关系

本文针对当前计算机在图书应用的实际情况,将“异化”概念引入图书情报现代技术中,对现代技术应用对工作人员所产生的生理和心理的危害作了国详细的分析,并用人机工程学批判了“自动化会减轻工作量和减少工作人员”这二种不正确的观点,并应用人机工程学以解决“异化”所带来的问题,进一步改善了人机之间的关系。     

毛泽东与新中国道德典范建设

毛泽东是新中国道德典范建设的发起者、倡导者和积极推动者。他根据我国社会主义建设的实际需要,从现实中提炼出富于时代特色的道德典范,将道德典范建设与思想政治教育有机结合起来,充分发挥道德典范的辐射力和凝聚力,开展思想道德教育。     

基于BP神经网络的大学生实践教学效果评价研究

实践教学是高等学校教学工作的重要组成部分,其中实践教学效果评价是保障高等学校实践教学质量的重要环节。针对高校大学生项目实践教学效果评价需求,构建项目实践教学效果评价指标体系,在此基础上设计调查问卷,利用网络问卷收集评价原始数据,通过Python进行数据预处理,并采用BP神经网络对某高校大学生项目实践教学效果实施评价,结果表明,该方法对于高校实践教学效果评价具有较强的实用性。     

“数学核心素养”导向下的考生水平分析与反思——以2018年高考(天津卷)数学(文史类)试卷为例

依据2018年高考(天津卷)数学(文史类)试卷实测数据,通过研究"一体四层四翼"高考评价体系在试卷中的体现来分析试题特色,并参照《考生水平表现标准(数学)》,对2018年天津高考文科考生数学核心素养的水平表现及反映出的教学问题进行评价和分析,提出有针对性的教学建议。