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355篇 您的检索式:作者名="Qing S"
    题名 作者 年代 出处 被引量
1裂缝性油气藏采收率:100个裂缝性油气田实例的经验总结(英文)显示文摘通过对世界上100个裂缝性油气藏的综合评价,研究储集层及流体本身的性质(包括孔隙度、渗透率、黏度、可动油比例、含水饱和度、润湿性及裂缝分布特征等)和驱动机制及油藏管理战略(优化日产量和采用不同类型的提高采收率技术)对其最终采收率的影响。将裂缝性油气藏分为4类:Ⅰ类的基质几乎没有孔隙度和渗透率,裂缝是储存空间和流体流动的通道;Ⅱ类的基质有较低的孔隙度和渗透率,基质提供储存空间,裂缝提供流动通道;Ⅲ类(微孔隙)的基质具有高孔隙度和低渗透率,基质提供储存空间,裂缝提供流动通道;Ⅳ类(大孔隙)的基质具有高的孔隙度和渗透率,基质提供储存空间和流动通道,裂缝仅增加渗透率。对26个Ⅱ类油气藏和20个Ⅲ类油气藏的开采历史的研究表明:Ⅱ类油气藏的采收率受水驱强度和最优日产量控制,日产量过高会很容易破坏Ⅱ类油气藏,一些Ⅱ类油气藏如果管理得当,采收率可以很高,不需要二次或三次采油;Ⅲ类油气藏的采收率主要受岩石和流体本身性质的影响,特别是基质渗透率、流体重度、润湿性以及裂缝强度等,不进行二次或三次采油不可能完全开采,往往需要采用一些提高采收率的专门技术。以往将Ⅱ类和Ⅲ类裂缝性油气藏归为一类,认识它们的区别将有助于选择更好的开发策略。Jack Allan S Qing Sun 2003石油勘探与开发2003,30,6:17
2Intensive blood pressure reduction in acute cerebral haemorrhage trial (INTERACT): a randomised pilot trial显示文摘Craig S Anderson Yining Huang Ji Guang Wang Hisatomi Arima Bruce Neal Bin Peng Emma Heeley Christian Skulina Mark W Parsons Jong Sung Kim Qing Ling Tao Yue Chun Li Jian Dong Jiang Li Wen Tai Jin Li Zhang En Xu Yan Cheng Stephane Heritier Lewis B Morgenste 2008Lancet Neurology2008,,5:4
3“类比”在石油勘探开发中的应用(英文)显示文摘吸取他人成功的经验和借鉴别人失败的教训 ,对石油工业尤为重要。以如何运用类比为话题 ,对 6个国家 2 1家石油公司与地球科学家、油藏工程师和勘探开发经理们进行了广泛的采访和调研 ,获得了有关类比的应用范围、类比资料的来源、应用类比的过程以及如何避免滥用类比等方面的宝贵的第一手材料。其中两项主要结果是 :① 2 /3被采访的石油公司认为在全球范围内“撒网”类比 ,来寻找高质量的油气田 ,对降低勘探风险和优化油田开发决策至关重要 ;只有不到 1/3的公司在勘探评价和选定开发方案时只参考其工作区附近的油气井、油气藏或油气田资料。②尽管地震资料常常被作为决策的决定性信息 ,但绝大部分地质师和油藏工程师认为 ,是类比油气田为他们提供了成功进行勘探开发所需要的详细资料和思路 ,并且帮助他们加深了对关键参数的理解。调研结果显示 :高质量的类比确实有助于降低勘探风险 。Rod Sloan S Qing Sun 2004石油勘探与开发2004,31,3:3
4Simultaneous determination of oleanolic acid and ursolic acid by RP-HPLC in the leaves of Eriobotrya japonica Lindl显示文摘Oleanolic acid(OA) and ursolic acid(UA) are isomeric triterpenic acids and only one methyl's position is different between them.OA and UA always exist in the same plant,so it is difficult to separate them when determining contents by RP-HPLC.In this study,a very simple mobile phase for HPLC was developed to simultaneously determine UA and OA,and the factors affecting separation were also discussed.The mobile phase is methanol:water(95:5) with flow rate 0.4 mL/min.The retention time for OA and UA was 20.58 and 21.57 min,respectively,the resolution was 1.61.The average contents of OA and UA of three Loquat leaves sets were 1.4 mg/g and 5.6 mg/g,respectively.Regarding the HPLC,we found that changing mobile phase,adjusting the pH value or adding ion-pairing agent could not affect the separation between UA and OA greatly.While adjustment of the flow rate and column temperature could improve the resolution greatly.Xiao-Hong Xu,Qing Sun,Zhi-He Zang School of Pharmacy,Chengdu Medical College,Chengdu 610083,People’s Republic of China 2012Journal of Pharmaceutical Analysis2012,2,3:3
5Therapeutic efficacy and bone marrow protection of the mdr1 gene and over-dose chemotherapy with doxorubicin for rabbits with VX2 hepatocarcinoma显示文摘BACKGROUND : Malignant tumors are common diseases threatening to the health and life of human being. Clinically, the multidrug resistance of tumor cells and bone marrow depression caused by chemotherapeutic agents are the main obstacles to the treatment of tumors, and both are related to the mdr1 gene. The over expression of the mdr1 gene in tumor cells contributes to the multidrug resistance of malignant tumor cells. With little expression of the mdr1 gene, bone marrow cells particularly susceptible to multidrug resistance-sensitive agents, which cause serious toxicity in bone marrow. This study was undertaken to assess therapeutic efficacy of transplantation of bone marrow mononuclear cells transferred with the mdr1 gene and over-dose chemotherapy with doxorubicin for VX2 hepatocarcinoma of rabbits. METHODS: The mdr1 gene was transferred into the bone marrow mononuclear cells of rabbits, which was co- cultured with retroviral vector-containing supernatant, and the cells were autotransplanted into a rabbit model with VX2 hepatocarcinoma. After chemotherapy with doxorubicin, the protective effects of the mdr1 gene and therapeutic efficacy of over-dose chemotherapy were observed. RESULTS: The mdr1 gene was transferred successfully into the bone marrow mononuclear cells, with a transduction efficiency of 35%. After autotransplantation, the mdr1 gene was expressed functionally in bone marrow with a positive rate of 8%, indicating that the gene played animportant role in bone marrow protection. The rabbits with VX2 hepatocarcinoma, which had received the mdr1 gene-transduced cells, survived after chemotherapy with a 3-fold dose of adriamycin, and their white blood cell counts were (4.26±1.03)×104/L. Since hepatocarcinoma cells were eradicated, the survival time (97.00±46.75 d) of the rabbits was extended (P<0.05) and the healing rate of the tumor was increased (P<0.05). CONCLUSIONS: The transferring of the mdr1 gene into bone marrow mononuclear cells could confer chemoprotection to bone marrow, and over-dose chemotherapy could be prescribed for the treatment of malignant tumors.Yi Wang, Xian-Qing Jin, Shan Wang, Qiao Wang, Qing Luo and Xiao-Ji Luo Department of General Surgery Department of Ultrasound , Chongqing Children’s Hospital, Chongqing University of Medical Sciences, Chongqing 400014, China 2006Hepatobiliary & Pancreatic Diseases International2006,5,4:3
6Structure and composition of selectively cut and uncut Abies-Tsuga forest in Wolong natural reserve and implica- tions for Panda conservation in China 显示文摘Taylor A H Qing Z S 1989Biological Conservation1989,47,2:1
7Preparation of waterborne polyurethanes using an amphiphilic diol for breathable waterproof textile eoatings显示文摘Qing B M Lee S 2009Progress in Organic Coatings2009,66,8:1
8Quantum-dot-sensitized solar cells: Effect of nanostructured TiO2 morphologies on photovoltaic properties显示文摘Taro T Qing S 2012The Journal of Physical Chemistry Letters2012,3,14:1
9Probabilistic feature relevance learning for content-based image retrieval 显示文摘Peng J Bhanu B Qing S 1999Computer Vision and Image Understanding1999,75,12:1
10Distributed module of intrusion detection system based on Agent 显示文摘Ma H T Qing S H Chen W F 2001Journal of software2001,11,10:1
11novel multi walled carbon nanotube based biosen - sor for glucose detection显示文摘Wang S G Qing Zhang Ruili Wang 2003Biochemical and Biophysical Research Communication2003,311,:1
12High-stearic and higb-oleic Cottonseed oils produced by hairpin RNA-mediated post-tran- scriptional gene silencing显示文摘LIU Qing Singh S P Green A G 2002Plant Physiol2002,129,:1
13KB- R7943 block of Ca2+ influx via Na+/Ca2+ exchange does not alter twitches or glycoside inotropy but prevent Ca2 + overload in rat ventricular myocytes显示文摘Satoh H Ginsburg K S Qing K 2000Circulation2000,101,:1
14Land use change in rice, wheat and maize production in China (1961-1998)显示文摘TONG CHENG LI CHARLES A S HALL WAGN HONG QING 2003Agriculture Ecosystems & Environment2003,95,3:1
15Forkhead transcriptionl factor FoxM1 regulates mitotic entry and prevents spindle defects in cerebellar granule neuron precursors 显示文摘Ulrich S Qing Z Susana A G 2007Mol Cell Biol2007,27,23:1
16The impact of alignment between virtual enterprise and information technology on business performance in an agile manufacturing environment 显示文摘Cao Qing Dowlatshahi S 2005Journal of Operations Management2005,23,5:1
17A survey of dynamic spectrum access 显示文摘ZHAO Qing BRIAN M S 2007IEEE Signal Processing Magazine2007,24,3:1
18Neural network resolution on Horn clause set显示文摘Xia S F Qing M Yang X 2003Proceedings of the Second International on Machine Learning and Cybernetics2003,,11:1
19An Approach to the Method for Determination of Surface Potential on Solid/Liquid Interface: Theory 显示文摘LI Hang QING Chang-le WEI S Q 2004Journal of Colloid and Interface Science2004,275,1:1
20Modification of FeSiO2 interaction with zirconia for iron-based Fisch- er-Tropsch catalysts显示文摘QING M YANG Y WU B S 2011Journal of Catalysis2011,279,1:1
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