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Search Results: 1 - 10 of 92252 matches for " 郑秋生 "
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甘草总黄酮与石见穿总酚酸联用促肝星状细胞凋亡作用研究
郭雷,李慧,
中国中医药信息杂志 , 2011, DOI: 10.3969/j.issn.1005-5304.2011.02.018
Abstract: 目的研究甘草总黄酮与石见穿总酚酸联用对氧化应激的肝星状细胞(hsc)的促凋亡作用。方法mtt法检测甘草总黄酮与石见穿总酚酸联用对大鼠肝星状细胞株(hsc-t6)增殖的影响。次氮基三乙酸铁与hsc-t6体外共培养建立氧化应激模型,采用tba法检测细胞内丙二醛(mda)含量,运用邻苯酸酚自氧化速率法检测超氧化物歧化酶(sod)活性。荧光探针dcfh-da检测细胞内活性氧水平。荧光染料hoechst33258观察细胞的形态及凋亡情况。jc-1检测细胞内线粒体膜电位变化情况。结果甘草总黄酮与石见穿总酚酸联合处理hsc-t6后,细胞的增殖受到抑制,并促进hsc-t6凋亡;细胞内线粒体膜电位下降;随着药物剂量的增加细胞内活性氧含量下降。结论甘草总黄酮与石见穿总酚酸联用促进氧化应激的hsc凋亡,此作用可能与线粒体凋亡途径有关。
不同温度下钢管混凝土冲击力学性能试验研究
,霍静思,陈柏,肖岩
工程力学 , 2009,
Abstract: 采用分离式霍普金森压杆(SHPB)装置进行了15个钢管混凝土在不同温度(常温到400℃)下的抗冲击性能试验研究,通过测量试件的应变时程曲线和应力时程曲线,分析其高温下的抗冲击动力特性。试件破坏形态和实测荷载-变形关系曲线表明,钢管混凝土具有良好的高温下抗冲击力学性能,即具有较高的强度和屈服后承载能力,以及良好的塑性变形能力和完整性。
甘草查耳酮A药理作用研究进展
赵虹,蒋江涛,
中国中药杂志 , 2013,
Abstract: 甘草查耳酮A(licochalconeA)为甘草中黄酮类化合物,近年来其药理活性倍受关注。研究表明甘草查耳酮A有抗肿瘤,抗炎,抗菌,抗寄生虫,成骨活性等多种药理作用。文章对甘草查耳酮A各种药理作用的国内外研究文献进行综述。
基于陷阱网络的入侵行为研究
邵奇峰 郭基凤 裴斐?
计算机科学 , 2005,
Abstract: 介绍了陷阱网络的概念和体系结构,分析了陷阱网络的计算机取证技术,论述了基于陷阱网络的入侵行为研究。
混合云中的一个高效协调器
王宗江?,,曹健?
计算机科学 , 2015, DOI: 10.11896/j.issn.1002-137X.2015.01.022
Abstract: 云计算提供了4种部署模型:公有云、私有云、社区云和混合云。通常,一个私有云中可用的资源是有限的,因此云用户不得不从公有云租用资源。这意味着云用户将会产生额外的费用。越来越多的企业选择混合云来部署它们的应用。在混合云中,为了实现用户的利益最大化,必须满足使用资源的费用最小化和用户的qos,为此为混合云用户提供了一个既能最小化资源费用又能保证满足qos的资源分配方法。实验结果表明,该算法在保持低操作成本的同时还满足了用户的qos。
同一性发展与沉浸探索
Identity Development and Ruminative Exploration
 [PDF]


Advances in Psychology (AP) , 2015, DOI: 10.12677/AP.2015.512097
Abstract:
Marcia (1966)提出的同一性状态理论主导了同一性研究,但难以解释同一性发展过程。Luyckx等人(2006a, 2008a)提出的双环模型同时考虑了同一性过程和结果,拓展并修正了同一性状态理论。个体在同一性发展中可能由于自身和环境原因,长期无法作出未来决定而陷入沉浸探索,引发一系列心理社会问题。沉浸探索具有特定的表现、形成过程和行之有效的应对策略。现代社会的青少年越来越需要指导和支持以摆脱沉浸探索和同一性危机。深入了解沉浸探索和同一性发展过程的表现及机制,有助于把握个体成长规律并获得完善的自我发展。
Identity status theory proposed by Marcia (1966) dominated identity researches, while it is difficult to explain the process of identity development. Dual-cycle model proposed by Luyckx et al. (2006a, 2008a), taking into account the identity process and results, expanded and revised the identity status theory. Some people can’t make a long-term future decision constantly and be trapped in ruminative exploration due to individual or environmental factors during the identity development process, triggering a series of psycho-social problems. Ruminative exploration has specific performance, formation process and some effective coping strategies. Young people in modern society have a growing need for guidance and support to promote them to get through ruminative exploration and identity crisis. Understanding the performance and mechanisms of identity development process and ruminative exploration thoroughly can help individuals better grasp the regular patterns of growth and gain complete self-development.
同一性自主发展:阻碍与促进因素
Independent Development of Identity: Discourage and Encourage Factors
 [PDF]


Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.64047
Abstract:
同一性是一个不断发展变化的概念,反映了研究者对其内涵和发展过程认识的加深。同一性发展受到生理、心理、社会等内容的交互影响,许多因素常常阻碍或者促进同一性发展。根据个体是否进行了积极主动的探索,区分出达成和早闭这两种具有不同表现的状态。同一性发展也受到个体内部动机的影响,同一性的成功经验能够促进同一性积极发展。父母和同伴既可以作为发展榜样和支持力量,也可能成为同一性发展的阻碍因素。在一些不鼓励过多探索的社会环境中,同一性探索甚至可能引发个体巨大的矛盾与冲突。对未来持有不同态度的个体,表现出差异显著的同一性发展。同一性自主发展受到阻碍,可能引发严重的问题行为和发展危机。
Identity is a developing and changing concept, reflecting researchers’ deepening understanding of its connotation and development process. The development of identity is influenced by the inte-raction of physiology, psychology and society; many factors often hinder or promote the develop-ment of the identity. According to whether the individual has a positive exploration or not, the status of achievement and the status of for closure are distinguished. Identity development is also influenced by the internal motivation of individuals, successful experience can promote the positive development of identity. Parents and peers can work as role models and supportive forces, and also may be a hindrance of identity development. Identity exploration may not be recognized or even lead to individual conflict in some social environment. Individuals who hold different attitudes towards the future show different development processes. If independent development of identity is hindered, it may lead to maladaptive behavior and the developmental crisis.
热处理肿瘤细胞抗原负载树突细胞抗小鼠结肠癌效应
应敏刚,红 刘胜,龚福,谢云青
中国科学 生命科学 , 2008,
Abstract: 研究了热处理肿瘤细胞抗原负载骨髓来源的树突细胞(dendritic cell,DC)对结肠癌小鼠的治疗作用.将小鼠结肠癌细胞CT26热处理后超声破膜,以其细胞裂解液负载BALB/c小鼠骨髓来源的DC,观察DC诱导肿瘤特异性细胞毒性T淋巴细胞(cytotoxic T lymphocyte,CTL)杀伤活性;并将DC接种于荷瘤小鼠皮下,观察其对肿瘤生长的抑制作用及对荷瘤小鼠生存期的影响.发现致敏DC诱导的CTL对CT26肿瘤细胞具有显著的杀伤作用.用致敏DC免疫小鼠后,对小鼠肿瘤的生长具有显著的抑制作用,并能显著延长荷瘤小鼠的生存时间.热处理肿瘤细胞抗原负载的树突细胞对结肠癌小鼠具有显著的治疗效果.
Visual standard model and complex wavelet-based nature images recognition
基于视觉标准模型和复数小波的自然图像识别*

ZHENG Gui-fang,LIAN Qiu-sheng,
桂芳
,

计算机应用研究 , 2011,
Abstract: This paper proposed an algorithm based on the dual-tree complex wavelet, which has approximate shift invariance and the good directional selectivity, and the algorithm here can extract features with shift-invariance and scale-invariance and can solve the problem that compute complicatedly in visual standard model proposed by Serre. When tested on Caltech5 database, the algorithm can achieve high recognition rate. Combined with up-bottom attention mechanism, the method could keep the recognition rate, and decreases the computation cost greatly. Experimental results show that the proposed algorithm can comparable to standard model but at a lower computation cost.
Study on Complementation of Passive Testing and Active Testing on Simulation Software
仿真软件的被动测试与主动测试互补的研究

赵一丁,刘凤华,,楚纪正,李志民
计算机科学 , 2012,
Abstract: There are some disadvantages in passive testing and active testing on simulation software in practice. The de- tails on complementation between passive testing and active testing were proposed aimed at these disadvantages. Histor- ical data can be obtained through certain passive mechanisms from practical data in advance, and the effectiveness of test for the historical data can be improved. Both "orderly method" and "inversion method" can effectively overcome the dis- advantages of active testing and passive testing,also the complementation of them is more flexible in practice. BUU data obtained by the test can take great role for modification of parameter in mathematical model of simulation software. De- tails of the complementary testing should be associated with the development process of simulation software.
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