检索结果-南通市图书馆

CFD-DEM simulation of high density particles fluidization behaviors in 3D conical spouted beds

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第5期88卷 266-281页

作者： Lin Jiang Mofan Qiu Rongzheng liu Bing liu Youlin Shao Malin liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua UniversityBeijing 100084China

The spouted bed has been used in the coating process of high-density nuclear fuel *** particle fluidization behaviors in pseudo-2D and 3D spouted beds were simulated and *** effects of four independent variables(cone angle,particle density,inlet gas velocity,and particle loading)on particle fluidization behaviors in the 3D spouted bed were investigated *** cone angle effect on fluidization mechanism was studied quantitatively first time.A new fluidization quality index was proposed based on the particle entrainment principle,and an extreme value was obtained when the cone angle was 60°,considered to be the optimum value for the 3D conical spouted *** was indicated the gas–solid contact efficiency can be kept up if the gas velocity was proportional to ρ_(p)^(0.65) and N_(p)^(0.78) when the particle density or loading was *** results will be useful for geometry and operation parameters design of the 3D conical spouted bed and helpful for developing the fluidization mechanism of high-density particles.

关键词： Spouted bed High-density particle CFD-DEM Fluidization quality index Particle loading

The Quantitative Analysis Method for Blended Fabric Made from Wool and Soybean Protein Fiber

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Quantitative Analysis Method for Blended Fabric Made fro...

富油凹陷洼槽区油气成藏机理与成藏模式--以冀中坳陷饶阳凹陷为例

第三届中国国际毛纺织会议

作者： Zhang Xuan Hao fengming liu Ping College of Textile Xi’an University of Engineering Science & Technology Xi’an 710048 China Huang Gu Tianjin Polytechnic University Tianjin 300160 China

＜正＞The paper discusses the quantitative analysis method,with the solvent method with 5% caustic,on the basis of the qualitative analysis of wool and soybean protein fiber,and the characteristic of wool soluble in the 5% caustic,whereas soybean protein fiber insoluble in,which is accurate and *** corrected weight coefficient of soybean protein fiber is *** paper is useful in product developing and process controlling.

关键词： quantitative analysis solvent method with 5% caustic corrected weight coefficient

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

石油学报 2017年第1期38卷 67-76页

作者：赵贤正蒋有录金凤鸣刘华杨德相王鑫赵凯中国石油华北油田公司河北任丘062552 中国石油大港油田公司天津300280 中国石油大学地球科学与技术学院山东青岛266580

随着正向构造带勘探难度的增加,洼槽区逐渐成为渤海湾盆地富油凹陷增储上产的重要领域,而成藏机理的特殊性制约了洼槽区勘探的深入。以冀中坳陷饶阳凹陷为研究对象,通过对洼槽生烃能力、油气成藏时期、成藏动阻力条件以及输导体系等分析... 详细信息

随着正向构造带勘探难度的增加,洼槽区逐渐成为渤海湾盆地富油凹陷增储上产的重要领域,而成藏机理的特殊性制约了洼槽区勘探的深入。以冀中坳陷饶阳凹陷为研究对象,通过对洼槽生烃能力、油气成藏时期、成藏动阻力条件以及输导体系等分析,探讨了富油凹陷洼槽区油气藏的形成机理及模式。研究表明,饶阳凹陷富油洼槽区有效生烃范围大,热演化程度较高,存在东营组沉积末期和新近纪明化镇组沉积期2期主要生烃及成藏过程;东营组沉积末期油气充注范围较小,储层物性好,成藏阻力小;而明化镇组沉积充注时期,储层物性差,成藏阻力大,但剩余压力大,油气成藏动力强。洼槽中心区的油气多沿源岩层系中的砂体、裂缝和小断层等进行短距离运移聚集形成岩性为主的油气藏;洼槽边缘区往往发育深切入烃源岩的油源断层,成为油气垂向运移的重要通道,油气沿断层运移聚集形成构造为主的油气藏。富油洼槽区存在"源内-两期成藏-隐蔽输导-短距离运移"与"源外-单期成藏-断裂输导-垂向运移"2种油气成藏模式,成藏动、阻力条件控制着洼槽区有效烃源岩层系内油气成藏的物性下限,而断层为主体的输导体系分布特征及有效性控制着洼槽区源外油气的分布和富集程度。

关键词：富油洼槽成藏机理成藏动力成藏模式饶阳凹陷

在线全文

学校读者我要写书评

暂无评论

蒲黄有机酸对家兔血小板聚集性的影响

中国民间疗法 1999年第6期7卷 48-49页

作者：冯欣刘凤鸣北京妇产医院北京阜外心血管病医院

蒲黄有机酸是从香蒲科香蒲属植物狭叶香蒲（Ｔｙｐｈａａｎ－ｇｕｓｔｉｆｏｃｉａＬ．）提取的。蒲黄是一种活血化瘀药，对心血管病，如动脉粥样硬化、冠心病等有明显疗效。资料表明生蒲黄对ＡＤＰ诱导人及家兔体外血小板的聚集性有明... 详细信息

蒲黄有机酸是从香蒲科香蒲属植物狭叶香蒲（Ｔｙｐｈａａｎ－ｇｕｓｔｉｆｏｃｉａＬ．）提取的。蒲黄是一种活血化瘀药，对心血管病，如动脉粥样硬化、冠心病等有明显疗效。资料表明生蒲黄对ＡＤＰ诱导人及家兔体外血小板的聚集性有明显抑制作用（１、２），还能降低血小...

关键词：血小板聚集聚集性胶原蒲黄有机酸家兔

Control Strategies for Digital Twin Systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 170-180页

作者： Guo-Ping liu IEEE the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

With the continuous breakthrough in information technology and its integration into practical applications, industrial digital twins are expected to accelerate their development in the near future. This paper studies various control strategies for digital twin systems from the viewpoint of practical *** make full use of advantages of digital twins for control systems, an architecture of digital twin control systems, adaptive model tracking scheme, performance prediction scheme, performance retention scheme, and fault tolerant control scheme are proposed. Those schemes are detailed to deal with different issues on model tracking, performance prediction, performance retention, and fault tolerant control of digital twin systems. Also, the stability of digital twin control systems is analysed. The proposed schemes for digital twin control systems are illustrated by examples.

关键词： Digital twin control systems fault tolerant control model tracking performance prediction performance retention

Relation Between the Eventual Continuity and the E-property for Markov-Feller Semigroups

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第1期40卷 1-16页

作者： Yong liu Zi-yu liu LMAM School of Mathematical SciencePeking UniversityBeijing100871China

We investigate some relations between two kinds of semigroup regularities, namely the e-property and the eventual continuity, both of which contribute to the ergodicity for Markov processes on Polish *** precisely, we prove that for Markov-Feller semigroup in discrete time and stochastically continuous MarkovFeller semigroup in continuous time, if there exists an ergodic measure whose support has a nonempty interior,then the e-property is satisfied on the interior of the support. In particular, it implies that, restricted on the support of each ergodic measure, the e-property and the eventual continuity are equivalent for the discrete-time and the stochastically continuous continuous-time Markov-Feller semigroups.

关键词： Markov-Feller semigroup ergodicity e-property eventual continuity

在线全文

学校读者我要写书评

暂无评论

邻苯二甲酸丁基苄酯致神经细胞氧化损伤

生态毒理学报 2014年第1期9卷 97-102页

作者：闵安娜刘锋明晏彪陈明清杨旭华中师范大学生命科学学院调控与整合生物学湖北省重点实验室武汉430079

为探究邻苯二甲酸丁基苄酯(butyl benzyl phthalate,BBP)对小鼠神经的毒性作用,进行了小鼠体外毒理学研究。首先用不同浓度的邻苯二甲酸丁基苄酯染毒神经模型细胞—N2a神经瘤细胞,通过噻唑蓝比色法(MTT),Hoechst 33258染色实验评价邻苯... 详细信息

为探究邻苯二甲酸丁基苄酯(butyl benzyl phthalate,BBP)对小鼠神经的毒性作用,进行了小鼠体外毒理学研究。首先用不同浓度的邻苯二甲酸丁基苄酯染毒神经模型细胞—N2a神经瘤细胞,通过噻唑蓝比色法(MTT),Hoechst 33258染色实验评价邻苯二甲酸丁基苄酯的细胞毒效应;通过对染毒细胞氧自由基(ROS)、丙二醛(MDA)、还原型谷胱甘肽(GSH)含量的检测来探究BBP对小鼠神经瘤细胞的氧化损伤效应。随着BBP浓度的不断增高,细胞的MTT值逐渐变小,当BBP的浓度达到10 g·L-1时,MTT实验结果与对照组出现显著性差异;Hoechst 33258染色结果显示:高浓度的BBP导致细胞核呈现出不规则状态,出现了凋亡小体;随着BBP染毒浓度的升高N2a细胞中的ROS水平和MDA含量逐渐上升,分别在0.16 g·L-1和10 g·L-1开始与对照组相比出现了显著性的差异(p<0.05);而GSH系数呈现下降趋势,在0.32 g·L-1时开始出现显著性差异(p<0.05)。实验结果表明高浓度的邻苯二甲酸丁基苄酯可以导致神经瘤细胞的凋亡,并产生氧化损伤效应。

关键词：邻苯二甲酸丁基苄酯细胞凋亡细胞毒性氧化损伤神经毒性

Synthesis of core-shell nanostructured SiO_(2)/TiO_(2)photocatalysts via atomic layer deposition in a fluidized bed with central tube

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第8期91卷 19-28页

作者： Wei liu Daoyin liu Zuyang Zhang Zhenkun Sun Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy&EnvironmentSoutheast UniversityNanjing 210096China

Fluidized bed atomic layer deposition is an efficient technique for particle coating with precise control over the film thickness and uniformity at the *** this study,a fluidized bed with a central tube is designed,where the central tube has two roles:improve fluidization and deliver precursors *** synthesis of core-shell structured SiO_(2)/TiO_(2)nanoparticle catalysts for photodegradation of tetracycline hydrochloride(TC)is carried out using TiCl_(4)and H_(2)O as precursors at 180℃under atmospheric *** the combination of vibration and central tube,the segregation of agglomerate size along the bed height is weakened,and the prepared SiO_(2)/TiO_(2)nanoparticles show excellent photocatalytic degradation performance:the degradation efficiency on TC is 96%under 300 W xenon lamp irradiation for 60 *** mechanism of enhanced photocatalytic activity is due to the Ti-O-Si bonds generated at the interface,which increase the ability to absorb sunlight and accelerate the separation of holes and electrons.

关键词： SiO_(2)/TiO_(2)nanoparticles Fluidization Atomic layer deposition Photocatalysts Photocatalytic mechanism

Graph Signal Reconstruction from Low-Resolution Multi-Bit Observations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第1期33卷 153-160页

作者： Zhaoting liu Chen YU Yafeng WANG Shuchen liu School of Communication Engineering Hangzhou Dianzi University

Low hardware cost and power consumption in information transmission, processing and storage is an urgent demand for many big data problems, in which the high-dimensional data often be modelled as graph *** paper considers the problem of recovering a smooth graph signal by using its low-resolution multi-bit quantized observations. The underlying problem is formulated as a regularized maximum-likelihood optimization and is solved via an expectation maximization scheme. With this scheme, the multi-bit graph signal recovery(MB-GSR) is efficiently implemented by using the quantized observations collected from random subsets of graph nodes. The simulation results show that increasing the sampling resolution to 2 or 3 bits per sample leads to a considerable performance improvement, while the energy consumption and implementation costs remain much lower compared to the implementation of high resolution sampling.

关键词： Quantization (signal) Costs Power demand Simulation Energy resolution Signal sampling Signal reconstruction