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Search Results: 1 - 10 of 335154 matches for " 王洪申 "
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山东中新世山旺组葛属(豆科)小叶的形态及其古生态学意义
Leaflet Morphology of Pueraria (Leguminosae) from the Miocene Shanwang Formation of Shandong Province and Its Palaeoecological Implications
 [PDF]

,,
Botanical Research (BR) , 2012, DOI: 10.12677/BR.2012.12003
Abstract: 葛属Pueraria是豆科蝶形花亚科、菜豆族大豆亚族中最大的、具有三小叶复叶的属,其大多数种为攀援性藤本植物,分布于东亚、南亚、东南亚和大洋洲。化石记录表明,葛属早在中新世就已出现在东亚、巴尔干半岛和高加索地区的亚热带和温带植物群中,目前已知有3个化石种,即中国山旺中新世的荚果化石山旺葛藤P. shanwangensis、山旺和日本数个中、上新世产地的叶、小叶化石鲁葛藤P. miothunbergiana以及克罗地亚和格鲁吉亚阿布哈兹中新世的小叶化石大葛藤P. maxima。本文基于对中新世山旺组最近采集的葛属小叶印痕化石的观察和对现生种葛P. montana小叶的形态比较,研究了该属化石种的小叶形态和发育变异。结果表明,现生种葛与化石种鲁葛藤和大葛藤的小叶都具有不甚发育的间二级脉,这个特征在先前报道的鲁葛藤小叶化石中未见保存。另外,它们的主脉和二级脉远轴侧有时都会分别发出两条挨得很近、角度不同的二级脉和二级脉梳脉,这个特征过去在葛属中则被忽视了。总体上,葛属小叶化石的叶脉特征在中新世广阔的欧亚中纬度地区显示了高度的相似性。目前,仅在中国中新世山旺植物群和日本中新世高峰山组植物群中发现了与现生的葛小叶相似的、具有裂瓣的鲁葛藤小叶化石,但现生葛比化石葛的小叶更大些、似乎发育了更多具有裂瓣的小叶,这可能与中新世以来大气二氧化碳浓度的变化有关。现生葛长在荫蔽生境以及攀援于支持物(如藤架或其他木本植物)上的植株比生于开阔生境以及蔓生的植株发育了更多的、具有裂瓣的小叶,这可能有效促进了整株植物的叶片和冠层中的光照截取和通风散热。据此推测,中国和日本中、上新世的鲁葛藤居群可能比克罗地亚和阿布哈兹中新世的大葛藤居群的生态耐受性更加宽泛,东亚的居群既生于荫蔽的、更多依赖森林的生境中,也长在开阔的、较少依赖森林生境中,甚至蔓生。
Pueraria DC. is the largest papilionoid legume, trifoliolate genus of the subtribe Glycininae in the tribe Phaseoleae, the majority species of which are climbing lianas distributed in East Asia, South Asia, Southeast Asia, and Oceania. The known three fossil species of Pueraria described from the subtropical and temperate floras of the Balkan Peninsula, the Caucasus, and eastern Asia respectively are P. shanwangensis (fruit) from the Miocene Shanwang of China, P. miothunbergiana (leaf and leaflet) from the Miocene of Shanwang and numerous localities in the Mio-Pliocene of Japan, and P. maxima (leaflet) from the Miocene of Croatia and Georgian Abkhazia. On the basis of observations on the newly collected Pueraria leaflet impres-sions and comparisons with the leaflets of living P. montana, the morphology and developmental variation of Pueraria leaflet fossils are studied. The result shows that the leaflets of both living species P. montana and fossil species P. miothunbergiana and P. maxima bear poorly developed intersecondary veins, which were not observed in former reports on P. miothunbergiana. Also, two adjacent secondary veins or agrophic veins at different angles are sometimes diverged respectively from the primary vein (midvein) and the exmedial side of secondary veins in both extant and fossil Pueraria leaflets, which is a feature that has long been neglected. Overall, the venation of fossil Pueraria leaflets that are widely occurred across the Miocene of middle lati-tudes in Eurasia is highly similar, but the lobed leaflets similar to those of living P. montana are only discov-ered from the Miocene Shanwang flora of China and Takamine flora of Japan. Extant P. montana bears larger leaflets than fossil Pueraria and seems to have developed more lobed leaflets than fossil P.
关于乔木状石松植物茎压印化石主要分类性状的评述
Notes on the Key Taxonomic Characters of Arborescent Lycopsid Stem Adpressions
 [PDF]

,,
Botanical Research (BR) , 2013, DOI: 10.12677/BR.2013.23012
Abstract:

乔木状石松植物在晚古生代植物群中一直引人注目,是最早在中泥盆世(约393~383百万年前)就进化出两极生长、乔木和异孢习性的维管植物类群之一。本文评述了乔木状石松植物茎压印化石一些主要的分类性状以及相关术语,包括叶座、叶痕、通气道痕、叶舌和叶序。建议这些分类性状在使用中应该规范,并强调了它们的生物学和埋藏学意义。
The Late Palaeozoic arborescent lycopsids are one of the conspicuous vascular plant groups, which have developed the bipolar growth, tree and heterosporous habits since the Middle Devonian (ca. 393 - 383 million years ago). In this paper, the key taxonomic characters and relevant terminology on stem adpressions of arborescent lycopsids are reviewed. These characters include leaf cushion, leaf scar, parichnos scar, ligule, and phyllotaxy. We suggest that the taxonomic characters should be defined properly, with considerations to their biological and taphonomic implications in practice.

ipo13及CD146在子宫内膜息肉中的表达及意义
,
中国热带医学 , 2012,
Abstract:
煤矿立井50t提煤箕斗关键技术研究
,,刘禹
煤炭科学技术 , 2015,
Abstract: 为了满足大型矿井立井对50t提煤箕斗的使用需求,针对50t箕斗研制过程中存在的关键技术问题进行了研究,在综合分析井筒断面利用率、物料流动性等因素的基础上,提出了箕斗截面尺寸及高度的确定方法,利用有限元计算分析方法对箕斗斗箱强度进行了仿真分析,确定了斗箱最大应力点位于斗箱中下部,根据动力学公式分析计算了闸门开启阻力和导轨冲击载荷,为大型箕斗结构设计提供依据。结合某矿井实际工况,确定了50t箕斗截面长×宽为337m×155m,高度为232m,有效容积为58m3,并完成了样机试制。
应明确《会计法》在民商法中的重要地位
,
财会月刊 , 2006,
Abstract:  我国属于大陆法系,而且与法、德等大陆法系国家的会计环境存在许多相同之处,如会计信息都强调为宏观经济服务,政府在会计法规制度的制定中起着重要作用。但是,由于各自所处的社会政治、经济、法律文化等环境因素的不同,两者也存在着重大差异,主要表现在:在法律这一层次上,大陆法系国家均没有单独的会计法,而主要是通过商法典和公司法等法律对会计方面的内容进行规范,商法典和公司法中关于会计方面的内容比较全面、系统,逻辑性很强。例如,《法国商法典》就涉及了商人的会计义务、会计报告、资产计价、会计原则、账簿设置、会计契约等方面的主要内容,《商事公司法》又对有关会计、审计及公司财务活动作了详细的补充规定。作为德国会计法规体系核心的《德国商法典》也对公司会计做出了详细、具体而又系统的规定,其篇幅约占整个商法典的三分之一,充分显示了会计法规在《德国商法典》中的重要地位,而且《有限责任公司法》和《股份有限公司法》又做出了比《德国商法典》更详细、更切实的会计核算规定,成为商法典的重要补充。大陆法系国家的这种“法典式会计制度”明确地将会计法规的主体部分置于商法典中,确保了作为重要商事活动调整规范的会计法规与相关法律制度之间的统一性,也有效地保证了会计法规的效力和权威性。
基于虚拟切片的体视学模型仿真与分析
白晓燕
南方医科大学学报 , 2008,
Abstract:
复发性口腔溃疡患者口腔菌群的变化
见璋陈清
南方医科大学学报 , 2009,
Abstract:
医学生视域下的“问题为基础的学习”
Problem-Based Learning from Medical Students Perspectives
 [PDF]

,, 袁红艳, 陈黎, 耀楠
Advances in Education (AE) , 2016, DOI: 10.12677/AE.2016.61005
Abstract:
目的:学生对“问题为导向的学习”(Problem-Based Learning, PBL)的认识直接影响此教育理念的实施。从医学生角度评价PBL的效果,从中发现问题,并提出可能的解决方案。方法:对经历了基础医学整合课程PBL的学生进行问卷调查,并对回馈进行分析。结果:57.7%的学生喜欢PBL课程,90%以上的学生对自己、所在小组以及小组教师的表现比较满意。但是有12.9%的同学不适应PBL,有22.9%的同学更喜欢传统的授课为基础的学习。结论:PBL有助于提高医学生的胜任力。应加强教师及学生培训,合理调整课程体系,充分发挥PBL在基础医学教育中的优势。
Objective: Recognition of the students to the Problem-Based Learning (PBL) directly affects the implementation of this educational philosophy. In this paper, the effect of PBL on medical students’ learning was explored in order to find out the problem and propose the possible solutions. Methods: Questionnaire survey was carried out in the medical students who experienced the problem-based learning in integrated basic medical curriculum. The feedbacks were analyzed. Results: 57.7% of students preferred PBL program; more than 90% of students were satisfied with the performance of themselves, group and tutors. Nevertheless, 12.9% of students did not adapt PBL; 22.9% of students preferred traditional lecture-based learning. Conclusions: PBL may help improve medical student competencies. To exploit the advantages of PBL in basic medical education, the tutors and students training should be stressed, and the curriculum program should be designed around PBL.
通过问题导向学习促进医学生人文素质教育的思考
Consideration of Facilitating the Humanistic Quality Education of Medical Students through Problem-Based Learning
 [PDF]

,, 刘畅, 陈黎, 耀楠
Vocational Education (VE) , 2016, DOI: 10.12677/VE.2016.52008
Abstract:
我国的高等医学教育多注重医学生专业技能的培训,而忽视人文素质的培养。将问题导向学习与人文素质教育结合在一起,能够提供尊重、和谐的学习氛围,改善医学生语言表达能力、与人沟通技巧及团队协作精神,促进具有扎实的专业知识、又兼备宽厚人文情怀的医学生的培养。
Higher medical education in our country pays much attention to the training of medical students’ professional skills, and the humanistic quality education is usually ignored. The authors consider that problem based learning in conjunction with humanistic quality-oriented education may pro-vide respectable and harmonious learning environment, and improve the language ability, com-munication and interpersonal skills and team-work spirit in medical students. It may facilitate educating medical students with not only solid professional knowledge but also humanistic spirit.
正则图点可区别全色数的一个上界
The bound of vertex-distinguishing total chromatic number of regular graphs

强会英,
福州大学学报(自然科学版) , 2016, DOI: 10.7631/issn.1000-2243.2016.03.0311
Abstract: 图G的一个正常全染色被称作点可区别全染色,如果G中任意两个点的色集合不同,其中每个点的色集合包含该点及其关联边的色. 应用概率的方法得到了n个点的k-正则图G的一个点可区别全色数的较小上界.
A proper total coloring of the graph G is called vertex distinguishing total coloring,if any two vertices have different color sets,where the color set of a vertex is the set composed of all colors of the vertex and the edges incident to it. In this paper,we obtained the new upper bound of vertex distinguishing total chromatic number of the k-regular graphs with n order by the way of probability
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