Results 1 to 10 of about 32,077 (249)
Optical spectrum of the post-AGB Star HD56126 in the wavelength interval 4010-8790 Å Å [PDF]
Astrophysical Bulletin, 2007 The optical spectrum of the post-AGB star HD56126 identified with the infrared source IRAS07134+1005 is studied in detail using high spectral resolution observations (R = 25000 and 60000) performed with the echelle spectrographs of the 6-m telescope. A total of about one and a half thousand absorptions of neutral atoms and ions, absorption bands of C2,
V. G. Klochkova +3 more
openaire +1 more source
Measurement of the A-Value of the Intersystem Transition in Al II at 2670 Å: Å Progress Report [PDF]
International Astronomical Union Colloquium, 1984 Ratios of intensities of spectral lines produced in the radiative decay of collisionally-excited levels of atomic ions are versatile indicators of electron density in astrophysical plasmas when one of the lines involves a metastable level (see the review by Feldman 1981 and references therein). Radiative transition probabilities (A-values) and electron
B. Carol Johnson, H.S. Kwong
openaire +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2007 在“分形城市”概念基础上，结合分形理论与住区规划设计的一般内涵，提出了“分形住区”设计思想.“分形住区”设计思想包括分形结构、分形元素和分形组织3个层面内容，每个层面均包涵分形与分维这两个必不可少而又不可分割的基本概念.进而，解释了分形与分维在各个层面上的涵义，完整地论述了“分形住区”的设计思想.最后，文章阐述了“分形住区”设计思想的现实意义，并就研究结论进行了必要的讨论.
QILi-bo(齐立博) +2 more
doaj +1 more source
Two-Dimensional Automatic Mesh Generator for Finite Element Analysis [PDF]
, 1986 In this study a new automatic mesh generator for 2- dimensional finite element analysis is proposed, and its effectivity is surveyed through a number of test examples. Proposed one is for a micro-computer, and the program is written in BASIC.
Kajitani, Eiji +2 more
core +1 more source
An Analysis of Inquiries to the International Students Advisory Office at Okayama University from Organizations/Individuals Outside the University [PDF]
, 2018 In this paper, the authors examine the reasons why outsiders such as the staff of public and private sector organizations as well as individuals made contact with the International Students Advisory Office（ ISAO） at Okayama University during the period
Hirota, Yoko, Oka, Masumi, Uzuka, Mariko
core +1 more source
Shuitu Baochi Xuebao, 2022 为探究坡形对浅沟发育的影响，以陕西省靖边县狼儿子沟无人机航摄影像为基础数据，通过目视解译得到浅沟（指瓦背状地形底部）225条，统计了浅沟条数、浅沟长度、沟头到分水岭的距离及浅沟密度等指标。利用浅沟地形分水线上的高程点进行插值得到原始坡面数字高程模型（digital elevation model，DEM），以此DEM提取地形曲率以表征坡形，进而分析坡形与浅沟指标的关系。结果表明：（1）以浅沟地形分水线上的高程点插值后的DEM对浅沟进行了综合，能较好地表达浅沟发育之前原始坡面的地形特征。（2 ...
王海于 +4 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2015 利用扫描电镜技术对金银花尺蠖（Heterolocha jinyinhuaphaga Chu）雌雄蛾触角感受器的种类、形态及分布进行了观察.结果发现，金银花尺蠖雌雄蛾触角上共分布9种感受器，分别为毛形感器、刺形感器、鳞形感器、腔形感器、腔锥形感器、耳形感器、腔乳头感器、叉形感器、锥形感器，其中，毛形感器数量最多，叉形感器只存在于雄蛾触角上.
XIANGYuyong(向玉勇) +2 more
doaj +1 more source
Shuitu Baochi Xuebao, 2004 分形理论和方法为地貌学的非线性研究开辟了新的思路。本文基于分形基本理论和GIS技术,对地处黄土高原丘陵沟壑区第一副区的岔巴沟流域地貌形态分形特征进行了量化研究,提出了流域地貌形态特征分形信息维数的计算模型和方法,并依此获得了岔巴沟流域及各支流域的地貌形态特征分形信息维数。研究表明,岔巴沟流域及各支流域的地貌形态特征分形信息维数均小于1,且与流域面积保持很强的正相关;分形信息维数揭示了流域地貌形态复杂本质的量化特征,为黄土高原小流域侵蚀产沙预报模型中宏观地貌形态因子的量化提供了新的思路和方法。
崔灵周 李占斌 肖学年
doaj +2 more sources
Gaoya dianqi, 2023 对比分析了Duval五边形法及Duval三角形法两种基于油中溶解气体分析的方法在鉴别有载分接开关状态方面的效果，确定了Duval五边形中与有载分接开关正常状态对应的区域，并利用Duval五边形法对特高压换流变压器有载分接开关进行实际诊断。结果表明：Duval五边形法可以实现有载分接开关正常及异常状态的辨识，超过95.5%正常状态的有载分接开关气体体积分数特征点落在编号为D1的低能放电区域；对245台有载分接开关状态进行识别的结果表明，Duval五边形法对正常状态的诊断准确率高于Duval三角形法 ...
韩丹丹, 张亮, 邹梦
doaj
PFU微型生物群落监测中异养性指数的应用研究及其分形分析 [PDF]
, 2004 对常德和汉江的异养性指数(HI)进行了分形分析,表明异养性指数在二维空间分布具有自相似性.异养性指数数据点与化学综合污染指数(P)数据点在双对数坐标中分段拟合时,当常德和汉江的LogP分别小于0 602和0 493时,常德和汉江的分形维数分别为0 39332和0 74110;当常德和汉江的LogP大于0 602和0 493时,常德和汉江的分形维数分别为0 30678和0 27239.拐点的出现表明异养性指数的变化在两个尺度域内遵从着不同的规律.拐点尺度以前,分维数较高,表明群落组成复杂 ...
冯伟松,沈韫芬
core