图形技术在图书馆信息查询系统中的应用     

李恒 《现代图书情报技术》1991,7(4):48-49

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试论体育与健康课程资源及其开发与利用     

李恒 《新课程导学(上)》2013,(27)

在新课程改革的大教育环境下,全国各级各类学校广泛深入开展“阳光体育运动”,体育课程、体育教学也已经从原来的“技术运动”转变为“健康体育”,为了更好地让学生们认识和注意到体育课程的真正意义,了解体育与健康课程也在教学中逐渐增大的影响,本文就体育与健康课程资源及其开发与利用进行研究和探讨.  相似文献   

中国水玉簪属Burmannia L.区系特征的初步研究     

李恒 《中国科学院研究生院学报》1983,21(2):121-129

The genus Burmannaia is one of the largest genera in the Burmanniaceae, of which 12 species have been recorded in China.  It is mainly a tropical genus.  The species in China are all confined to the region south of Yangtze River. They are distributed chiefly in the provinces Guangdong (9 species) and Yunnan (6 species). After having studied the areas of all the species in China, we are able to classify them into follow- ing 4 area-types:      1.  Area-type of Tropical Asia to Tropical Australia. The two non-saprophytic species (Burmannia disticha, B. caelestis) and one saprophytic (B. championii) belong to this area-type.  It is an ancient type.  The plants of this type mostly have a wide ecological amplitude, for example, B. disticha may be found in tropical and subtropical regions.  The plants occur not only in evergreen forests, in bushs, but also in rather arid herbosa and on the side of streams (Fig. 2).     2. Area-type of Tropical SE Asia.  In the type are 3 saprophytic species i.e. B. oblonga, B. wallichii and B. nepalensis.      3. Area-type of E. Asia.  (Fig. 3) Burmannia in China with E. Asian distribu- tion is poor in species.  There are only 2 saprophytic species. B. cryptopetala is distri-buted in Haina (China), Kyushu and Honshu (Japan); B. itoana occurs in Taiwan (China), Riukiu and Kyushu (Japan).  They are known only on the islands of E. Asia. Such a pattern of distribution may suggest connection of these islands once in the prehistoric time in spite of their present isolation.      4.  Endemic area-type. (Fig. 4).  Here are 3 saprophytic species and one variety with green leaves.  B. nana occurs only in E. Taiwan.  One of the two new species described by present author in this paper, B. fadouensis, is known from Xichou Xiao, S. E. Yunnan, to Longzhou Xian of the province Gaunxi; the other one, B. pingbien- ensis occurs only in Pinbien Xian of S. E. Yunnan. The last species is endemic to China. B. pusilla var. hongkongensis is non-saprophytic and known from the province Guang- dong and its bordering islands.  Both B. fadouensis and B. pingbienensis are characte- rized by the axillary bulbils, which enable them to adapt to rather arid and cold condi-tions in northern part of the tropical region.  相似文献   

中国特有植物——俅江蜡瓣花(金缕梅科)的再次确认     

张志耘  李恒 《中国科学院研究生院学报》1996,34(6):627-630

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穗花柊叶属(竹芋科)植物增补     

李恒 《中国科学院研究生院学报》1985,23(2):144-148

The present paper reports the first record of the eGnus Stachyphryni- um, Marantaceae, in China.  It is characterized by solitary spikes, elongated and erect with impricated bracts.  The inflorescence arises from a short stem on the rhizome.       In this genus there are 14 species in total.  They are distributed from Sri Lanke to Java and Borneo, through Indo-China Peninsula, Malay Pennisula.  Its distribution center is in Indo-China Penninsula and Malay Penninsula.  The north limit lies in sou- thern Yunnan of China. Most species of the genus have a stenochorie area, for example, S. zeylanicum is endemic to Sri Lanka; S. latifolium occurs in Java only and so on.      A New species, S. Sinense H. Li, to China, is illustrated and described in Latin.  相似文献   

例谈苏轼谐趣词对北宋文人的影响     

李恒 《文学教育(上)》2014,(23):123-123

词至苏轼手中“亦自是一家”,不重复前人.在苏轼之后影响了很多词人,本文拟以黄庭坚为例,探讨苏轼谐趣词对北宋文人的影响.  相似文献   

运用英语作业评语评价学生学习浅论     

陆采新  李恒 《基础教育论坛》2012,(16):48-51

高中英语作业评语作为一种形成性评价手段有其自身的特点和功能,体现了新课程标准的理念,高中教师要根据其特点发挥评语作用,写好评语.  相似文献   

中国手语中的时间空间隐喻     

吴铃  李恒 《中国特殊教育》2012,(12):25-29

中国手语中在水平方向和垂直方向上共有"上-下"、"前-后"和"左-右"三种类型的时间空间隐喻。分析表明,中国手语中的时间空间隐喻发生的理据性和动因与汉语大致相同,均符合认知语言学中提出的"体验性"观点。但也应同时看到,中国手语和汉语对某些时间空间隐喻的理解也存在差异,如前者缺乏"未来在后-过去在前"的隐喻表达,因此在对聋人进行汉语教学时,应当着重厘清两种语言的不同,以更有效的教学方式提高聋人的汉语水平。  相似文献   

辽宁销售公司存货管理浅析     

李恒  李博 《吉林广播电视大学学报》2012,(4):129+118-129,118

存货管理已经是现代企业管理的重要部分。本文立足于探寻提升企业效益之路,从中国石油辽宁销售分公司库存管理现状入手,剖析库存成为利益的矛盾点,且容易出现应收款项现象等两大弊端,然后从目前辽宁公司所采取的相应措施,分析辽宁公司存货管理在未来的发展方向,最终得出相应结论。  相似文献   

对于带未知噪声的反卷积系统的多传感器信息融合辨识算法     

李恒  韩波  赵正平  李怀敏 《宜春学院学报》2016,(3):12-14

对于一个带未知噪声的反卷积系统,提出一种基于自回归滑动平均(ARMA)模型的多传感器信息融合辨识算法,使用该算法可以得到对系统未知噪声统计和部分未知参数的局部和融合估计,并且证明了估计的收敛性。  相似文献