Results 41 to 50 of about 32,081 (263)
钢结构预拼装是检测构件加工精度及保证结构在现场顺利安装的主要技术手段,它的实现方式主要有实体预拼装和虚拟预拼装两种。为更加有效地管控项目成本,通过建立成本控制数学模型来分析钢结构虚拟预拼装技术及钢结构实体预拼装技术在北京新机场项目中的应用,分别从钢结构预拼装技术比对、两种预拼装方案之间的成本影响因素、实际项目数据佐证、效益分析等几个方面对预拼装成本进行系统阐述。通过成本分析模型,优选拼装方案;通过对主要因子控制,进而达到更好的成本控制。
孟玲霄+5 more
doaj
Analysis of diphenylsilanediol oligomers by HPLC-MS/MS(二苯基硅二醇低聚物的液相色谱-质谱分析)
采用三重串联四级杆液质联用仪(HPLC-MS/MS)对二苯基硅二醇缩合得到的低聚物进行分析,优化了色谱条件,组分分离效果良好.对质谱碎片离子进行解析,产物为二苯基硅二醇、1,1,3,3-四苯基-1,3-二硅氧烷二醇(二聚体)、1,1,3,3,5,5-六苯基-1,5-三硅氧烷二醇(三聚体)、1,1,3,3,5,5,7,7-八苯基-1,7-四硅氧烷二醇(四聚体)的混合物.2种催化条件下得到的产物组分相同,但主成分不同,盐酸催化下主要得到二聚体,钛酸正丁酯催化下主要得到三聚体和四聚体.
NIUGuiying(牛桂英)+3 more
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本文根据中国科学院可持续发展研究组的中国可持续发展能力评估指标体系和云南省“十三五”时期经济社会发展指标体系,并结合云南省社会经济发展现状,构建了云南省社会经济可持续发展竞争力评价指标体系,采用主成分分析法对云南省2005~2014年的社会经济可持续发展指标体系进行综合评价分析,并在此基础上得到相应的结论。 According to the evaluation index system of the China sustainable development ability which was put
莫玉莲, 费宇
semanticscholar +1 more source
Nonlinear predictions in regression models based on kernel method [PDF]
Thesis (Ph. D. in Engineering)--University of Tsukuba, (A), no. 5170, 2009.7.24Includes bibliographical references (p.
Wibowo Antoni
core
シュセイブン ブンセキ ニ ヨル ハイ キノウ ケンサ ノ ブンルイ ケツエキ ガス ヲ ノゾク ハイ キノウ ケンサ 19 コウモク ニ タイスル ブンセキ [PDF]
花本 澄夫, 主成分分析による肺機能検査の分類-血液ガスを除く肺機能検査19項目に対する分析-, 日本胸部疾患学会雑誌, Vol.34, No.2, pp.133-138 ...
ハナモト, スミオ, 花本, 澄夫
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ABSTRACT Women's reproductive rights in China are shaped by geopolitical and cultural factors, resulting in restricted access to planned oocyte cryopreservation (planned OC). While the global discourse surrounding planned OC continues to evolve, China currently sanctions egg freezing for medical purposes exclusively in married women, while prohibiting ...
Olivia M. Y. Ngan+2 more
wiley +1 more source
Administrative Burdens and Inequities in COBRA Take‐Up
ABSTRACT To what extent does COBRA's lack of program visibility and complexity induce inequities in access to this form of health insurance? Though COBRA has long been an important tool for helping workers to avoid “job lock,” precious little scholarship has been devoted to understanding its reach.
Miranda Yaver
wiley +1 more source
本文通过粪便分析对甘肃兴隆山保护区食肉兽的食性及与马麝的关系进行了初步研究.粪便直径分析表明,该地区食肉兽主要为狐和豹猫.粪便内含物分析结果表明,啮齿类和鸟类出现的频率分别为81.6%~88.4%和21.1%~38.6%,马麝成体在4~5月很高(17.6%),幼麝在出生期高达21.1%.分析认为兴隆山食肉兽对马麝的捕食主要在马麝的幼仔期.
高志千, 康发功
doaj
Strangers on the ladder of the party‐state: Women in teaching in Nationalist Taiwan, 1940s–1980s
Abstract As the ruling party of a party‐state in China and Taiwan, the Nationalist Party (Kuomintang/Guomindang) built a close relationship with the teaching profession. Many teachers joined the party and there was a well‐trodden pathway from teaching into local representative politics and civil service.
Joseph Lawson
wiley +1 more source
2004年3~9月,我们对卧龙自然保护区核桃坪基地野化培训大熊猫个体"祥祥"的夜宿地组成结构进行了初步观察,并采用主成分分析(PCA)对471组夜宿地数据所涉及的7种结构因子(廊道、竹林、余竹堆、岩石、乔木、倒木、灌草丛)进行了统计分析。结果表明:在大熊猫"祥祥"的夜宿地结构中,"廊道"、"竹林"和"乔木"是最主要的3个因子。经单因素方差分析检验表明,在对地势的选择中,"祥祥"偏爱坡度5°~30°的缓坡竹林 ...
谢浩+13 more
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