oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
藏北聂荣县查吾拉区中侏罗统巴通阶与基底岩系角度不整合的发现及其地质意义  [PDF]
李尚林,王根厚,胡敬仁,方斌,马伯永,岳宗玉,王仁财
地质通报 , 2005,
Abstract: 在聂荣县查吾拉区一带首次发现中侏罗统巴通阶与下伏前奥陶系基底变质岩系之间呈角度不整合接触在包括查吾拉区在内的索县――左贡地层分区中.中侏罗统仅有巴通阶超覆不整合于“浅基底”变质岩系之上。反映了南、北羌塘盆地之间的中央隆起带不仅在双湖一带发育,而且在查吾拉区以东地区同样也发育。这一发现对该地层分区构造古地理的研究具有重要意义。
南京社区妇女乳腺癌筛查知信行现状及影响因素  [PDF]
王彤彤, 尹立红, Grace X. MA, 李晓波, 刘冉, 杨淼, 李云晖
中国公共卫生 , 2015, DOI: 10.11847/zgggws2015-31-05-34
Abstract: ?目的了解江苏省南京市妇女乳腺癌筛查知信行现状并分析其影响因素,为制定合理有效的乳腺癌筛查干预模式提供依据。方法采取随机整群抽样方法抽取南京市418名≥40岁社区妇女为调查对象,采用乳腺癌筛查知信行问卷进行调查。结果调查对象乳腺癌筛查知识总知晓率为32.8%,主要影响因素有文化程度和职业(P<0.05);乳腺钼钯筛查信念得分为(31.94±4.17)分,在不同社会人口学特征对象间差异无统计学意义;曾经做过乳腺自我检查和乳腺临床检查的妇女分别占57.1%和82.3%,其中在最近1年内做过的分别占47.0%和45.7%,年龄和职业是影响自我检查行为的因素(P<0.05);有12.2%的女性曾经接受过乳腺钼钯检查,文化程度是实施乳腺钼钯检查的影响因素(P<0.01)。结论南京市社区妇女乳腺癌筛查知识较为缺乏,筛查率有待提高,年龄、职业、文化程度是筛查行为的影响因素。
前中央水產實驗所舉行山東全省漁業調查
壽振黄
科学通报 , 1950,
Abstract: 山東省爲我國海洋漁業最發達的一省,其漁產量佔全國第一位。一九五○年全國漁業生產計劃,以華東區生產額佔首位,華東區則以山東省爲重心。一九五○年度,本所重心工作,即配合此項任務,舉行山東全省漁業調查。實地調查全省各重要漁區情况,俾便瞭解各漁區實况及其現存問題,提供各項漁業基本統計資料,以備本年度生產工作的參攷,並備一九五一年度大力恢復山東省
前中央水產實驗所舉行山東全省漁業調查  [PDF]
壽振黄
科学通报 , 1950,
Abstract: 山東省爲我國海洋漁業最發達的一省,其漁產量佔全國第一位。一九五○年全國漁業生產計劃,以華東區生產額佔首位,華東區則以山東省爲重心。一九五○年度,本所重心工作,即配合此項任務,舉行山東全省漁業調查。實地調查全省各重要漁區情况,俾便瞭解各漁區實况及其現存問題,提供各項漁業基本統計資料,以備本年度生產工作的參攷,並備一九五一年度大力恢復山東省漁業及开发漁業资源的根据。
從植被調查談野外調查隊的準備、組織工作和進行的步驟
侯學煜
科学通报 , 1954,
Abstract: 調查全國植被(包括天然的和人工的)的性質、分佈和演變的規律,是中國科學院植物研究斯的新任務之一。這項工作,現在已經在植物分类学、形態解剖學、植物園和植物生態學、地植物学相结合的基礎上,會同所外有關部门,有計劃地分區進行着。
從植被調查談野外調查隊的準備、組織工作和進行的步驟  [PDF]
侯學煜,李世英
科学通报 , 1954,
Abstract: 調查全國植被(包括天然的和人工的)的性質、分佈和演變的規律,是中國科學院植物研究斯的新任務之一。這項工作,現在已經在植物分类学、形態解剖學、植物園和植物生態學、地植物学相结合的基礎上,會同所外有關部门,有計劃地分區進行着。
圖書行銷通路業務運作之調查研究 A Study on the Book Marketing Channels and the Business Operations in Taiwan  [PDF]
Shih-Luen Lin
Journal of Educational Media & Library Sciences , 2005,
Abstract: 身處知識經濟新世紀的新洪流,出版產業出版品品質之優劣與國家文明永續發展有著休戚與共的關係。縱觀出版生態從「創作端」、「生產端」、「流通端」以至於 「消費端」,每一連結皆屬環環相扣並缺一不可,尤其是流通端(圖書行銷),更扮演著舉足輕重的地位與角色。它不僅是對出版人之保證,更是開創出版事業版圖 發展與繁榮的必要條件、成功關鍵與主要命脈。本研究分析,主要在於探討國內圖書行銷各階通路業者往來的商業交易條件,以及可能實施創新的往來交易方式,並 根據2004年行政院新聞局委託中華徵信所調查「2003年圖書出版產業調查研究」,針對「行銷通路業」一環加以分析報告,最後將對相關行業及組織機構提 出必要之建議與鼓勵,俾供採行之參考。 In the new century of Knowledge Economics, there is a close relationship between the quality level of publications in the publishing industry and the continuo its development of a nation's civilization. Generally speaking, the publishing ecology deals with the realm of originality, production, circulation and consumption; every element of these three categories is necessary and closely linked with one another. The circulation (books marketing), in particular plays an important role; it is not merely the assurance to the publisher but it is the essential requirement, the key success factor and the life strain to the prosperity of the publishing industry as well. The purpose of this research is to explore the bits mess transaction terms together with the possible implementation of innovated term of transaction on all process of the Books Marketing; a further study and analysis will also be made on Marketing Channels of the Book Publishing Industry based upon the 2003 Survey of Book Publishing Industry which is entrusted by Government Information Office and investigated by China Credit Information Service Ltd.. Finally, necessary recommendations will he made to business, organizations or units concerned for possible improvement or timely encouragement for appropriate implementations.
電子資源整合查詢系統使用者接受度與使用行為之研究 A Study on User Perceptions and User Behavior of an Online Federated Search System  [PDF]
Ching-Yi Lee,Hao-Ren Ke
Journal of Educational Media & Library Sciences , 2012,
Abstract: 本研究探討使用者對電子資源整合查詢系統的認知情形、系統接受度與使用行為。本研究以科技接受模式為框架,發展適用於評量使用者對整合查詢系統之接受度與使用行為的問卷,繼而以交大圖書館之MetaLib系統為個案,探討該館讀者使用整合查詢系統的接受程度與使用行為,探討影響整合查詢系統使用行為的相關因素,分析本研究所提出之科技接受模式外部變項「教育訓練認知」和該模式之「易用性認知」、「有用性認知」、「態度」、「使用意願」及「使用行為」等變項間的關係。研究結果發現,整合查詢系統有助於使用者找尋所需的資源,使用者對於整合查詢系統功能的認同程度頗高,絕大多數會推薦他人使用該系統,但在系統功能、介面設計與使用者教育訓練方面仍有改善空間。結果證實教育訓練認知、有用性認知、易用性認知、態度、使用意願確實會影響使用者對整合查詢系統之認知情形、系統接受度與使用行為。 This study aims at investigating the perceptions, acceptance and usage behavior of users on federated search systems. The research method involved the development of a questionnaire on users’ satisfaction and acceptance of federated search systems based on Technology Acceptance Model (TAM). The federated search system implemented in National Chiao Tung University (NCTU) was used as a case system. In addition to the six constructs of TAM, i.e. perceived ease of use, perceived usefulness, attitude, behavioral intention, and actual use, the construct user training is proposed as the external variable. After the development of the questionnaire was finished, an online survey was conducted. 403 effective responses were collected. Through Pearson-product moment correlation and structural equation modeling, the correlation and causal relationships between factors which influence the acceptance of library SMS services were identified. The results show that federated search systems are helpful to obtain needed resources for users. Users recognize the functions of systems and most of them will recommend it to others. But there are still great improvements to be done on functions, interface design and user training. It is proved that user training, perceived usefulness, perceived ease of use, attitudes and intentions affect the perceptions, acceptance and usage behavior of federated search systems indeed.
胚胎冻融对卵裂期行植入前遗传学诊断或筛查后可移植胚胎临床结局的影响  [PDF]
石碧炜,崔龙,叶晓群,叶英辉
- , 2017, DOI: 10.3785/j.issn.1008-9292.2017.06.12
Abstract: 目的:探讨胚胎冻融对卵裂期胚胎行植入前遗传学诊断或筛查后可移植胚胎临床结局的影响。方法:回顾2011年1月至2016年12月在浙江大学医学院附属妇产科医院行植入前遗传学诊断或筛查的302个周期,分析其病例组成,比较其中新鲜胚胎组(n=184)与冻融胚胎组(n=118)的移植妊娠率、着床率、活产率和流产率,并分析妊娠结局的影响因素。结果:新鲜胚胎组正常或平衡易位胚胎检出率高于冻融胚胎组,平均移植胚胎个数多于冻融胚胎组,差异有统计学意义(均P<0.05);新鲜胚胎组的妊娠率、着床率和活产率低于冻融胚胎组,而流产率高于冻融胚胎组,但差异均无统计学意义(均P>0.05)。多因素logistic回归分析结果显示,女方年龄、男方年龄、胚胎类型、植入前遗传学诊断或筛查方式和病因对妊娠结局均无影响(均P>0.05)。结论:卵裂期胚胎冷冻复苏对植入前遗传学诊断或筛查后可移植胚胎的临床结局无显著影响。
Abstract: Objective:To investigate the effects of embryo cryopreservation and thawing on clinical outcomes of transplantable embryos after preimplantation genetic diagnosis (PGD) or preimplantation genetic screening (PGS) in cleavage-stage. Methods:The clinical data of 302 cases (including 118 cases using frozen/thawing embryos and 184 cases using fresh embryos) undergoing PGD/PGS in Women's Hospital, Zhejiang University School of Medicine during January 2011 and December 2016 were retrospectively analyzed. The pregnancy rate, implantation rate, live birth rate and abortion rate of fresh and frozen-thawed embryo transfer (FET) cycles were compared. And the influencing factors for pregnancy outcome was analyzed by multivariate logistic regression. Results:The rate of normal or balanced translocation embryos in fresh cycle was higher than that in FET cycle (23.52% vs 16.67%, P<0.05), and the average number of transplanted embryos was more than that in FET cycle (1.54±0.56 vs 1.33±0.51, P<0.05). But there were no significant differences in pregnancy rate (36.42% vs 40.00%, P>0.05), implantation rate (26.62% vs 32.91%, P>0.05), abortion rate (19.44% vs 8.33%, P>0.05) and live birth rate (25.96% vs 28.33%, P>0.05) between fresh cycle and FET cycle. Multivariate logistic regression showed that, parent ages, embryo status (fresh or frozen), the mode of PGD/PGS and the findings of PGD/PGS had no impact on pregnancy outcome (all P>0.05). Conclusion:Cryopreservation do not have significant effects on the clinical outcomes of transplantable embryos after PGD/PGS in cleavage-stage. Key words: Cryopreservation Embryo transfer Fertilization in vitro Cleavage stage, ovum Abortion, spontaneous/etiology Pregnancy outcome Preimplantation diagnosis Genetic screening
月壤及模拟月壤微观结构的研究  [PDF]
李丽华,唐辉明,刘数华
岩土力学 , 2012,
Abstract: 为了对比研究月壤与模拟月壤的微观结构,介绍了月壤的形成作用过程和5种基本颗粒类型;通过真实月壤照片,对月壤微观结构进行了分析;利用火山灰为模拟月壤主体材料,对其成分进行了检测;对模拟月壤的火山灰颗粒进行了显微图像分析试验。结果表明,月壤存在胶结物微观颗粒,胶结物颗粒具有分支的组织形态和封闭的气泡,并且有金属铁珠存在;火山灰所含的主要成分及含量与月壤相似,经过粉碎的火山灰试样棱角较为明显,其纵横比峰值略小,稍显长条状,但与月壤比较相近,而复杂度因子则略有欠缺,说明颗粒还不够粗糙和多棱
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.