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Search Results: 1 - 10 of 49515 matches for " 马倩倩 "
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人大肠癌线粒体dna重组质粒的构建
倩倩,张清华,
南方医科大学学报 , 2005,
Abstract: 目的了解大肠癌细胞株(sw480,lovo,ht29)线粒体dna的突变,克隆突变的大肠癌线粒体dna(mtdna)基因,构建pcdna3.i(+)-mtdna真核表达重组体,并导入nih3t3细胞,以探讨线粒体基因突变与肿瘤发生的关系。方法提取大肠癌细胞株(sw480,lovo,ht29)mtdna,扩增d-loop区,产物用dna自动测序法进行序列分析。利用dna重组技术将其定向插人真核表达质粒pcdna3.1(+),并用脂质体法导人nih3t3细胞。结果检测出大肠癌细胞株sw480、lovo、ht29细胞mtdnad-loop分别有10、9、8个突变位点。成功克隆1119bp的mtdnad-loop区至表达质粒pcdna3.1(+),并导入nih3t3细胞中。结论线粒体dnad-loop区是一个具有高度多态性和突变性的区域,在大肠癌细胞株中突变率较高。
基于关联熵系数的粗糙Vague集相似性度量方法
倩倩,媛媛,徐久成
- , 2018, DOI: 10.11992/tis.201706081
Abstract: 粗糙Vague集是将粗糙集和Vague集理论相互融合以处理不确定性信息的一种理论工具。本文在深入研究Vague集及粗糙模糊集的关联熵、关联熵系数及集合相似性度量方法基础上,将关联熵和关联熵系数的概念引入到粗糙Vague集,并详细讨论了它们的主要性质,同时证明了关联熵系数满足粗糙Vague集相似度的定义,可用于粗糙Vague集的相似性度量。最后通过实例验证了粗糙Vague集的关联熵系数用于度量粗糙Vague集之间相似性程度的有效性,该理论为粗糙Vague集相似性度量提供了一种新方法。
The rough Vague set is a theoretical tool that combines the theories of rough and Vague sets to deal with uncertain information. In this paper, we introduce the concept of relative entropy and its coefficient to a rough Vague set to investigate a method for measuring relative entropy, its coefficient, and the similarity of Vague and rough fuzzy sets. We also analyzed their main properties. We verified that the coefficient of the relative entropy has similarity with that of rough Vague sets, and that this coefficient can be used to measure the similarity of rough Vague sets. Finally, we conducted a case study to verify the effectiveness of using the relative entropy coefficient of a rough Vague set to determine the degree of similarity between rough Vague sets. This theory provides a new method for measuring the similarity of rough Vague sets
从创伤理论视角看电影《喜福会》中的创伤与疗伤
Trauma and Therapy in the Film The Joy Luck Club from the Perspective of Trauma Theory
 [PDF]

倩倩
World Literature Studies (WLS) , 2015, DOI: 10.12677/WLS.2015.34022
Abstract:
电影《喜福会》是一部家喻户晓的影片,近年来对于此作品的研究摆脱不了“东西文化冲突”、“女性主义”、“母女关系”等字眼,本文试图从创伤理论视角全面分析电影中母女的创伤,探讨创伤的来源并寻找疗伤的途径,希望读者从创伤理论视角对影片产生更为深刻的理解,也为华裔女性医治创伤提供借鉴。
The film The Joy Luck Club was a well-known film made on the basis of the novel of the same name. Recent studies mainly focus on the oriental and occidental cultural conflicts, feminism or relationship between mother and daughter. This paper tries to analyze the traumas of the four mothers and their daughters, the reasons for their traumas and possible means to cure traumas from the perspective of trauma theory in order to make readers have a profound understanding about the film and provide reference for Chinese-American women to cure their traumas in real life.
cis-3-芳脲基-2-苯基-2-氧代萘并[1,2-d]-1,2-氧膦杂环戊烷合成有机化学
孔杜林, 吴明书,倩倩, 静雅
有机化学 , 2010,
Abstract: 利用2-羟基-1-萘甲醛、芳基脲、苯基二氯化膦作为起始原料,在无水甲苯中反应合成cis-3-芳脲基-2-苯基-2-氧代萘并[1,2-d]-1,2-氧膦杂环戊烷.产物结构经IR,1HNMR,31PNMR和元素分析等进行了表征.
基于粒子群优化搜索的二级电压控制分区
王春燕,倩倩,成飞,赵彩虹
南京师范大学学报(工程技术版) , 2010,
Abstract: 电力系统的电压控制分区是一个非线性的大规模组合优化问题,使用常规方法难以得到理想的结果.现根据电压幅值对无功功率的灵敏度定义了电力系统各节点间的电气距离,在此基础上建立了电压分区的组合优化模型,将粒子群优化搜索方法用于已有的电压分区的优化模型.最后在IEEE39节点测试系统上对该方法进行了验证,结果表明该方法有效、可行.
基于二进制粒子群算法的可中断负荷优化调度
倩倩,赵彩虹,成飞,李振
南京师范大学学报(工程技术版) , 2011,
Abstract: 可中断负荷是非常重要的需求侧资源.本文对于在保证系统安全的前提下进行可中断负荷的优化调度,基于二进制粒子群优化算法(BPSO)分时段优化调度特性不同的多个可中断负荷,以满足系统各时段削减容量的需求,同时满足可中断负荷的运行约束条件,并使供电公司支付的补偿费用最小以及执行中断的次数最少.使用加权的处理方法把可中断负荷优化调度的多目标优化问题简化为单一的目标函数,经实例验证基于BPSO的优化算法对可中断负荷的优化调度是有效的.
众筹情境下两方创新合作的利润博弈分析
刘志迎,倩倩,朝良
- , 2017,
Abstract: 本文针对众筹过程中两大参与主体的特征,分析众筹情境中不同信息条件下投资方和筹资方的利润博弈过程,基于产量、产品投放度、折扣系数和创新度4个解释变量,对双方利益及决策的影响进行探讨,最终促使投资方和筹资方进行相应的策略选择.研究结果表明: 在完全信息条件下和不完全信息条件下,投资方和筹资方最终都能达到均衡状态,并获取各自最大收益,同时提出创新合作是一种双赢策略.
中国城乡成年人群哮喘患病状况及其影响因素
Prevalence and influential factors for asthma among adults in Chinese

倩倩,杨土保
MA Qianqian
, YANG Tubao

- , 2017, DOI: 10.11817/j.issn.1672-7347.2017.09.015
Abstract:
团簇同位素的基本原理与地质应用*
Basic principle of clumped isotopes and geological applications

李平平,倩倩,邹华耀,余新亚
- , 2017, DOI: 10.7605/gdlxb.2017.04.056
Abstract:

团簇同位素指的是含有2个及2个以上的重同位素结合在一起形成的同位素体。团簇同位素的数值定义为同位素体的相对丰度偏离随机分布状态的程度。测量该相对丰度较低的同位素体需要高精度的质谱仪,难点在于利用同位素组成已知的参考气体和不同同位素组成的加热气体,以获得绝对参考体系下的数值。团簇同位素体的相对丰度非常低,但是具有非常独特的物理和化学性质。比如碳酸盐矿物中13C18O16O的丰度对温度具有敏感性,而与矿物的全岩同位素以及矿物形成时期的流体性质无关,因此可以利用测量的碳酸盐团簇同位素来获得矿物的生长温度,再利用矿物的氧同位素(δ18O),根据传统的氧同位素温度计原理,可以进一步获得矿物的生长流体(水)的氧同位素。目前,团簇同位素温度计已经在古气候(温度)重建、古高度恢复、碳酸盐岩的成岩作用以及甲烷的成因分析等方面得到了广泛应用。评估深埋高温过程引起的C-O化学键重置对碳酸盐团簇同位素的影响、测试仪器产生对团簇同位素的非线性误差校正、以及其他丰度更低的团簇同位素体或大分子的团簇同位素的测量,是下一步的研究方向。


Clumped isotopes are isotopologues containing two or more than two rare isotopes clumping together. The clumped isotope value is used to denote the deviation extent from the stochastic distribution for a certain isotopologue. It is necessary to use a high resolution mass spectrometry to measure an isotopologue with relatively low abundance. The key is to obtain samples' clumped isotope values in the absolute reference frame by choosing a worked gas with known isotopic composition,and heated gases with different isotopic compositions. The relative abundances of clumped isotopes are extremely low,but clumped isotopes have peculiar physical and chemical property. For example,carbonate clumped isotopes(13C18O16O)are sensitive to their growth temperature,in dependent of carbonate bulk isotopic compositions and the oxygen isotope of the growth fluid. As a result,the growth temperature can be easily obtained using the measured clumped isotope value,and the oxygen isotope of the growth fluid can also be obtained combined the bulk carbonate oxygen isotope data using the conventional oxygen paleothemometry model. The clumped isotope paleothermometry has been widely used in the paleoclimate reconstruction,the paleoelevation estimation,carbonate diagenesis,and distinguishing methane origin. The future research focuses include: Evaluation the effect of carbonate C-O reordering resulting from large burial depth and relatively high temperature,the nonlinearity between actual and measured value produced by the mass spectrometry,the method of measuring clumped isotopes with even more lower relatively abundance or clumped isotopes of larger molecules.

Cn上φ-闭正流的Lelong数
The Lelong Number of a φ-Positive Closed Current on Cn
 [PDF]

王芳,倩倩
Pure Mathematics (PM) , 2016, DOI: 10.12677/PM.2016.62015
Abstract:
本文给出了Cn上φ-闭正流ddφf的Lelong数,这里φ是特殊Lagrangian calibration,f是Lloc1(Cn)中的φ-多次下调和函数。并且我们应用此Lelong数,将单复变中全纯函数的极小模原理进行了推广,给出了此类φ-多次下调和函数的一个下界估计。
In this paper, we give the Lelong number of a φ-positive closed current ddφf , where φ is the special Lagrangian calibration and f is a φ-plurisubharmonic function in Lloc1(Cn)?. Using that Lelong number, we generalize the minimum modulus principle for the holomorphic function of one complex variable, and we get an estimate of the low bound for φ-plurisubharmonic functions.
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