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Long Time Well-Posedness of the MHD Boundary Layer Equation in Sobolev Space

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Analysis in Theory and Applications 2020年第1期36卷 1-18页

作者： Dongxiang Chen siqi ren YuxiWang Zhifei Zhang College of Mathematics and Information Science Jiangxi Normal UniversityNanchangJiangxi 330022China Department of Applied Mathematics Zhejiang University of TechnologyHangzhouZhejiang 310032China School of Mathematical Sciences Peking UniversityBeijing 100871China

In this paper, we study the long time well-posedness of 2-D MHD boundary layer equation. It was proved that if the initial data satisfies■,then the life span of the solution is at least of order ε2-η for η > 0.

关键词： equation. satis Boundary

Comparative permeability of three saikosaponins and corresponding saikogenins in Caco-2 model by a validated UHPLC-MS/MS method

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Journal of Pharmaceutical Analysis 2021年第4期11卷 435-443页

作者： siqi ren Jingjing Liu Yunwen Xue Mei Zhang Qiwei Liu Jie Xu Zunjian Zhang Rui Song Key Laboratory of Drug Quality Control and Pharmacovigilance China Pharmaceutical UniversityNanjing210009China State Key Laboratory of Natural Medicine China Pharmaceutical UniversityNanjing210009China

Saikosaponins(SSs)are the main active components extracted from Bupleuri Radix(BR)which has been used as an important herbal drug in Asian countries for thousands of *** has been reported that the intestinal bacteria plays an important role in the in vivo disposal of oral *** the deglycosylated derivatives(saikogenins,SGs)of SSs metabolized by the intestinal bacteria are speculated to be the main components absorbed into the blood after oral administration of SSs,no studies have been reported on the characteristics of SGs for their intestinal absorption,and those for SSs are also ***,a rapid UHPLC-MS/MS method was developed to investigate and compare the apparent permeability of three common SSs(SSa,SSd,SSb2)and their corresponding SGs(SGF,SGG,SGD)through a bidirectional transport experiment on Caco-2 cell monolayer *** method was validated according to the latest FDA guidelines and applied to quantify the six analytes in transport medium samples extracted via liquid-liquid extraction(LLE).The apparent permeability coefficient(Papp)determined in this study indicated that the permeability of SGs improved to the moderate class compared to the corresponding parent compounds,predicting a higher in vivo ***,the efflux ratio(ER)value demonstrated an active uptake of SSd and the three SGs,while a passive diffusion of SSa and SSb2.

关键词： Bupleuri Radix Saikosaponin Saikogenin UHPLC-MS/MS Caco-2 cells Permeability

The Legal Logic in the Practice of Poverty Reduction in Rural China in the One Hundred Years Since the Founding of the Communist Party of China

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Contemporary Social Sciences 2022年第1期7卷 62-86页

作者： Zhang Lizhe ren siqi Sichuan Provincial Committee Party School of the Communist Party of China

Three major poverty reduction models have successively been adopted in the poverty control led by the Communist Party of China(CPC),namely reliefbased poverty alleviation,which focused on adjusting the production factors of land,development-driven poverty alleviation,and targeted poverty *** the process,the target of finding a rational position for the principal function of poverty alleviation has been gradually realized:the approach of poverty alleviation has gradually adjusted from micro to macro,from direct to indirect;while the management has transformed from mobilization-based to rule-of-law *** that link policies and laws,as well as a rule-of-law model of the poverty reduction of a developing country that is led by party committees and governments,has been formed,and an illustrative sample of poverty control has been created,which provides experience based knowledge to the anti-poverty practices in developing *** the future,it is necessary to further realize the protection of the rights of the people in comparative poverty and the proceduralization of poverty reduction administrative behaviors,as well as to formulate a unified "Poverty Reduction Law" when the time is ripe,to protect the rights of the people in comparative poverty in the post-poverty-alleviation era.

关键词： poverty control leadership of the Communist Party of China rule of law

Dual Channel Pricing of Large Fresh Chain Stores Considering Distribution Costs under Split Quotation

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Proceedings of Business and Economic Studies 2021年第1期4卷 35-40页

作者： Weiqun Xiao siqi ren Wulei Mao Beijing Wuzi University Beijing 101149China

After large fresh food chain stores have opened online channels,distribution costs are a key factor affecting consumers'online buying behavior,which affects dual-channel *** paper studies the dual-channel pricing strategy of large fresh food chain stores on the premise of dividing the quotation,considering the consumer's acceptance of online channels and the sensitivity to distribution *** research found that the optimal pricing of online channels is lower than that of retail *** optimal pricing of online channels is positively correlated with the acceptance of online channels,and negatively correlated with the sensitivity of consumer distribution ***,after retailers have opened online channels,the market scale has expanded compared with traditional retail ***,numerical experiments are used to analyze the influence of various influencing factors on retailers'decision-making.

关键词： Pricing strategy Sensitivity of distribution costs Acceptance of online channels

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滇池食蚊鱼胚胎发育特点及与母体的营养联系

中国水产科学 2023年第7期30卷 831-840页

作者：任司琪陈国柱西南林业大学云南省高原湿地保护修复与生态服务重点实验室西南林业大学云南省滇池湿地生态系统国家定位观测研究站西南林业大学国家高原湿地研究中心/湿地学院

卵胎生是鱼类为适应特定环境进化出的一种生殖策略。食蚊鱼(Gambusia affinis)是典型的卵胎生鱼类,厘清其卵胎生特征是否在入侵云贵高原过程中发生适应性演化的问题,有助于深入了解其种群快速扩散机制。本研究用常规解剖观察法、称重法... 详细信息

卵胎生是鱼类为适应特定环境进化出的一种生殖策略。食蚊鱼(Gambusia affinis)是典型的卵胎生鱼类,厘清其卵胎生特征是否在入侵云贵高原过程中发生适应性演化的问题,有助于深入了解其种群快速扩散机制。本研究用常规解剖观察法、称重法,针对滇池种群胚胎发育特点、干湿重变化及与母体营养联系问题开展研究。结果显示,滇池食蚊鱼胚胎发育过程依赖于卵黄营养供给,在产出前,卵黄仅微量残余,身体发育完善,基本保持了物种固有的卵胎生特点。胚胎湿重在胚胎发育过程中显著增加,但同时干重损失也十分明显(30.4%),营养指数(MI)为0.70,提示母体对胚胎没有受精后的特定营养供给,支持食蚊鱼是严格意义上的卵磷脂营养型(卵胎生)鱼类观点。其胚胎(仔鱼)出现小型化趋势,胚胎湿重、干重及初生体长等关键生态适应性性状明显低于已研究的其他低地种群,表现出对高原环境的适应性响应。这种响应是否有助于其向更高海拔的高原环境扩散值得进一步深入研究。

关键词：食蚊鱼卵胎生胚胎发育营养联系

报纸数字对象模型设计与应用——以上海图书馆《全国报刊索引》平台为例

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图书馆杂志 2018年第7期37卷 41-52页

作者：郭薇任思琪上海图书馆国家图书馆

老旧报纸的数字化加工具有重大的意义,但国内相关研究较少。本文通过研究上海图书馆自建的报纸数字对象模型的设计与应用,探讨了近代报纸数字化的重点和难点。本文以上海图书馆馆藏特色资源"近代报纸数据库"的建设需求为出发点,通过对... 详细信息

老旧报纸的数字化加工具有重大的意义,但国内相关研究较少。本文通过研究上海图书馆自建的报纸数字对象模型的设计与应用,探讨了近代报纸数字化的重点和难点。本文以上海图书馆馆藏特色资源"近代报纸数据库"的建设需求为出发点,通过对已有相关科研成果的充分调研,设计了报纸数字对象模型,并以此为基础制定了上海图书馆报纸文献的结构化元数据著录。经过多年的报纸数字化加工的实践和报纸数据库的部署应用,这一模型很好地满足了上海图书馆近代报纸资源库的建设需求。但未来,该模型还需要加强对大数据等的支持。

关键词：文献数字对象模型报纸对象模型设计

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网络技术发展引致的网络文化新趋势及其对策

重庆邮电大学学报（社会科学版） 2015年第4期27卷 85-89页

作者：任思奇胡娅电子科技大学四川成都611731

随着互联网技术的不断发展,网络的应用范围越来越广,网络功能得到了全方位综合发展,人类进入了网络社会时代。网络是人们的一种生活方式,是现实生活的延展,因而随着网络技术和相关产业的发展,网络文化也在不断生成,产生了一些新的趋势,... 详细信息

随着互联网技术的不断发展,网络的应用范围越来越广,网络功能得到了全方位综合发展,人类进入了网络社会时代。网络是人们的一种生活方式,是现实生活的延展,因而随着网络技术和相关产业的发展,网络文化也在不断生成,产生了一些新的趋势,如网络与现实交融更深、碎片化程度加剧、变得易被诱导等等,为了应对这些趋势,有必要采用注重网络与现实的统一规制、运用"大数据"整合文化碎片等新对策。

关键词：网络技术网络文化新趋势

Prandtl方程的整体适定性和有限时间爆破

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中国科学：数学 2018年第10期48卷 1415-1426页

作者：任偲骐章志飞北京大学数学科学学院北京100871

本文在解析框架下研究了两类Prandtl型方程的长时间适定性和爆破.对于经典Prandtl方程,本文证明了Paicu和Zhang (2011)得到的解的存在时间长度是最优的.对于从磁流体边界层模型导出的阻尼Prandtl方程,本文证明了小解析初值的整体适定性... 详细信息

本文在解析框架下研究了两类Prandtl型方程的长时间适定性和爆破.对于经典Prandtl方程,本文证明了Paicu和Zhang (2011)得到的解的存在时间长度是最优的.对于从磁流体边界层模型导出的阻尼Prandtl方程,本文证明了小解析初值的整体适定性和对一类大解析初值的有限时间爆破.

关键词： Prandtl方程适定性爆破

新媒体背景下社会主义意识形态“灌输”面临的机遇、挑战与对策

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重庆邮电大学学报（社会科学版） 2016年第6期28卷 77-82页

作者：吴朝文任思奇重庆邮电大学先进制造工程学院重庆400065 电子科技大学马克思主义教育学院四川成都611731

马克思主义"灌输"理论是科学的意识形态传播理论,体现了意识作用于实践的必然需求,实现了统治阶级意识形态的有效传播。当前,新媒体快速发展,其社会化、聚集性、开放性和交互性的特征,要求我们坚持"灌输"理论的原则和方法,掌握新媒体的... 详细信息

马克思主义"灌输"理论是科学的意识形态传播理论,体现了意识作用于实践的必然需求,实现了统治阶级意识形态的有效传播。当前,新媒体快速发展,其社会化、聚集性、开放性和交互性的特征,要求我们坚持"灌输"理论的原则和方法,掌握新媒体的传播规律,密切联系现实生活,转变思维方式和工作方法,实现新背景下"灌输"理论的新发展。

关键词：新媒体灌输意识形态