检索结果-南通市图书馆

Mapping Correlation Dimension along the Wall Region of a High-Flux Gas-Solid Riser Using Embedded Solid Concentration Time Series

引用

Engineering（科研） 2018年第10期10卷 655-679页

作者： Justin M. jeremiah Samwel V. Manyele Abraham K. Temu Jesse-X. Zhu Department of Chemical and Mining Engineering University of Dar es Salaam Dar es Salaam Tanzania Department of Chemical and Biochemical Engineering University of Western Ontario London Canada

Analysis of the entrance and wall dynamics of a high-flux gas-solid riser was conducted using embedded solid concentration time series collected from a 76 mm internal diameter and 10 m high riser of a circulating fluidized bed (CFB) system. The riser was operated at 4.0 to 10.0 m/s air velocity and 50 to 550 kg/m2s solids flux of spent fluid catalytic cracking (FCC) catalyst particles with 67 μm mean diameter and density of 1500 kg/m3. Data were analyzed using prepared FORTRAN 2008 code to get correlation integral followed by determination of correlation dimensions with respect to the hyperspherical radius and their profiles, plots of which were studied. It was found that correlation dimension profiles at the centre have single peak with higher values than the wall region profiles. Towards the wall, these profiles have double or multiple peaks showing bifractal or multifractal flow behaviors. As the velocity increases the wall region profiles become random and irregular. Further it was found that, as the height increases the correlation dimension profiles shift towards higher hyperspherical radius at the centre and towards lower hyperspherical radius in the wall region at r/R = 0.81. The established method of mapping correlation dimension profiles in this study forms a suitable tool for analysis of high-flux riser dynamics compared to other analyses approaches. However, further analysis is recommended to other gas-solid CFB riser of different dimensions operated at high-flux conditions using the established method.

关键词： Correlation Integral Mapping Correlation Dimension High-Flux Gas-Solid Riser Embedded Solid Concentration Time Series

来源：

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

Investigation of Entrance and Wall Dynamics of the High-Flux Gas-Solid Riser Using Statistical Analysis of Solids Concentration Signals

引用

Engineering（科研） 2019年第3期11卷 167-187页

Statistical analysis of the entrance and wall dynamics of a high-flux gas-solid riser was done using solid concentration time series data collected from a 76 mm internal diameter and 10 m high riser of a CFB system with a twin-riser operated at 4.0 to 10.0 m/s gas velocity and 50 to 550 kg/m2s solids flux. Spent fluid catalytic cracking catalyst particles with 67 μm mean diameter and density of 1500 kg/m3 together with 70% to 80% humid air was used. Solid concentration data were analysed using code prepared using FORTRAN 2008 to get statistical parameters and plot their profiles. Results obtained show that the gas-solid suspension flow in the riser is dominated by low solid concentration in the centre region and high solid concentration in the wall region which forms a core-annulus flow structure. The mean solid concentration in the wall region decreases with riser height from the dense bottom section to less dense in the fully developed flow section at the top of the riser. The gas-solid suspension flow in the centre region is dominated with uniform flow structure while the wall region is dominated with high fluctuations in solid concentration. Further, it was found that the entrance and developing flow sections of the riser exhibit high flow non-uniformities than the fully developed flow section of the riser. The flow non-uniformities in the entrance and developing flow section increase with increase in superficial gas velocity at constant solid flux. The wall region, from the entrance to the top sections of the riser along the axial direction exhibits both dilute and dense suspension flow.

关键词： Entrance Section Wall Region Statistical Analysis Flow Non-Uniformities Radial Non-Uniformity Index

来源：

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

Transformation Optics Collimating Lenses for Multi-Beam Antenna Applications

Transformation Optics Collimating Lenses for Multi-Beam Ante...

引用

2011 4th IEEE International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications

作者： Douglas H.Werner jeremiah P.Turpin Pingjuan L.Werner Department of Electrical Engineering The Pennsylvania State University University Park PA 16802USA

Transformation optics （TO） is a flexible design process for electromagnetic and optical devices with a wide range of applications including cloaking,waveguides,and antenna *** TO designs for antennas have been proposed,such as invisibility-cloaking radomes and collimating lenses;however,these designs all require inhomogeneous and anisotropic material parameters with extreme values that do not promote a practical ***,the choice of transformation is a critical part of the TO design process and determines whether the device can ultimately be *** this paper,we review two transformation designs with simple material parameters for the conversion of radiation from an embedded isotropic source into multiple highly-directive radiating beams.

关键词： anisotropic,antennas beam collimating lenses metamaterials multiple beams transformation optics

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

NAIL 'HOOD

引用

The World of Chinese 2017年第4期 40-47,3页

作者： jeremiah JENNE 俞必睿

Progress marches on, but one throwback neighborhood clings improbably to a precarious existence, in the shadow of some of Beijing's most iconic structures: Huashiying, a poverty-stricken warren of shanties, shops, and local culture. As the forces of modernity and order rip the heart from historic hutong, the survival of this urban village seems even more impressive. But how long can it hold out?

关键词： over CBD 城中村

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

WHEN CHINA GOES ON THE ROAD

引用

The World of Chinese 2022年第1期 78-79页

作者： jeremiah JENNE CAI TAO 不详

Between 1912 and 1949, affluent urban Chinese discovered travel, and tour companies advertised the exotic culture of ethnic minorities—sound familiar? In her new book Touring China, historian Yanjun Mo documents Chin... 详细信息

关键词： companies travel culture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of Flow Dynamics in the High-Flux Gas-Solid Riser Using Trajectory Distances across Attractors Reconstructed from Solid Concentration Signals

引用

Engineering（科研） 2018年第10期10卷 688-703页

The study of the entrance and wall dynamics of a high-flux gas-solid riser was conducted using trajectory distances of the reconstructed attractors from solid concentration signals collected from a 76 mm internal diameters and 10 m high riser of a circulating fluidized bed (CFB) system. The riser was operated at 4.0 to 10.0 m/s gas velocity and 50 to 550 kg/m2s solids flux. Spent fluid catalytic cracking (FCC) catalyst particles with 67 μm mean diameter and density of 1500 kg/m3 together with 70% to 80% humid air was used. Solid concentration data were analyzed using codes prepared in FORTRAN 2008 to get trajectories of the reconstructed attractors and their distances apart. Trajectory distances were found to increase from the centre towards the wall indicating the expansion of the attractor. The probability density function (PDF) of the trajectory distances changes from single peak at the centre to multiple peaked profiles in the wall region. Multiple peaked profiles indicate multifractal flow behaviours. Cumulative distribution functions (CDF) of the trajectory distances changes from single S-shaped at the centre to multiple S-shaped profiles in some locations of the wall region indicating multifractal flow behaviours. The PDF distribution of these distances at the entrance section and in the wall region forms different types of statistical distributions showing differences in gas-solid flow structures in various spatial locations of the wall region and the entrance sections. Most of the distributions at the centre fall under the Gumbel max distribution for all flow development sections of the riser, especially at air velocities of 5.5 m/s and 8 m/s showing uniform flow structures. Further, it was found that increase of the number of the phase space reconstruction embedding dimension increases the trajectory distances between the state vectors leading to the expansion of the attractor.

关键词： Trajectory Distance Probability Density Function Cumulative Distribution Function Euclidian Distance High-Flux Riser

来源：

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

Genetic association of rs7754840 and rs7756992 polymorphisms in the CDKAL1 gene and gestational diabetes mellitus in selected Filipino pregnant women

引用

Asian pacific Journal of Reproduction 2021年第4期10卷 155-161页

作者： Maria Ruth B.Pineda-Cortel Karlo Baybayan Peter Louie Bello Latiffa Lois Camenforte Stefany Jane Ching Kathleen Conti jeremiah Jose Ignacio Jiovanni Diaz Adrian Villavieja Jefferyl Kae Pandac Emilyn U.Alejandro Department of Medical Technology Faculty of PharmacyUniversity of Santo TomasManilaPhilippines The Graduate School University of Santo TomasManilaPhilippines Institute of Clinical Laboratory Sciences Silliman UniversityDumaguete CityPhilippines Research Center for the Natural and Applied Sciences University of Santo TomasManilaPhilippines Department of Integrative Biology and Physiology University of MinnesotaUSA

Objective:To investigate the possible association between rs7754840 and rs7756992 polymorphisms of CDKAL1 gene and susceptibility to gestational diabetes mellitus(GDM)in a Filipino pregnant ***:A total of 101 patients with GDM and 99 women without GDM were *** CDKAL1 gene single nucleotide polymorphisms(SNPs),namely rs7754840 and rs7756992,were genotyped by using TaqMan allelic discrimination ***-Whitney U test,median and interquartile range were used to describe physical and biochemical *** differences in the genotype and allele distribution of the target genetic variants among the two groups of participants were assessed by using Chi-square *** to Hardy-Weinberg equilibrium was tested prior to conducting further *** logistic regression model was used to investigate the effects of the genotype models on GDM ***:There was no observed correlation between the genotypes of the rs7754840 SNP and oral glucose tolerance test ***,there was no significant association between genetic models of the rs7754840 SNP and GDM risk(additive OR 1.43,95%CI 0.82-2.50,P=0.21;dominant OR 1.21,95%CI 0.57-2.59,P=0.62;recessive OR 1.63,95%CI 0.86-3.09,P=0.13).Conclusions:The results of this study suggest no association between CDKAL1 gene variant rs7754840 and GDM development in Filipino pregnant *** studies with a larger population should be performed to validate our findings.

关键词： Gestational diabetes mellitus GDM Single nucleotide polymorphism SNP Genetic association rs7756992 rs7754840 CDKAL1 Filipino pregnant women

来源：

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

摆脱习惯的思维方式理奇先生的住所兼工作室

引用

室内设计与装修 2007年第5期 98-102页

作者： Likit Que jeremiah Pitakwong 梁辉

“好的设计过程是，设计师和房主先摆脱习惯的思维方式，把没有尝试过的新做法运用到房间里。”

关键词：思维方式工作室设计过程设计师房间

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

生物毒素的研究与应用：选择性蜘蛛毒揭示Nav1.1通道在机械痛中的作用

引用

中国疼痛医学杂志 2017年第2期23卷 86-88页

作者： jeremiah D.Osteen Volker Herzig John Gilchrist 余书敏苏州大学

电压门控性钠(Nav)通道参与启动大多数神经元动作电位,其中也包括痛觉初级传入神经纤维。局部麻醉剂可通过非特异性阻断所有Nav通道亚型来抑制疼痛,但探求选择性亚型调节因子将更有助于分析Nav通道亚型对化学、机械或热痛的作用及机制... 详细信息

电压门控性钠(Nav)通道参与启动大多数神经元动作电位,其中也包括痛觉初级传入神经纤维。局部麻醉剂可通过非特异性阻断所有Nav通道亚型来抑制疼痛,但探求选择性亚型调节因子将更有助于分析Nav通道亚型对化学、机械或热痛的作用及机制。美国加州大学旧金山分校的jeremiah ***,Volker Herzig和David Julius等人通过运用电生理、组织化学及行为学,筛选和鉴定出一种蜘蛛毒素可选择性激活Nav1.1亚基,并阐明其在伤害感受和疼痛中的作用。在非神经炎症的情况下,Nav1.1的激活诱导了疼痛反应,产生了机械性痛觉过敏,而对热痛并无影响。在肠道中,高阈值机械敏感性神经纤维表达Nav1.1,且肠易激综合征模型小鼠也表现为毒素敏感性增强,证实了Nav1.1通道在调节机械痛的感觉神经纤维兴奋性中的作用。

关键词：机械性痛觉过敏生物毒素蜘蛛毒素通道传入神经纤维美国加州大学疼痛反应肠易激综合征

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

三大队列青年男性基线血清胆固醇水平与长期冠心病、心血管病和所有原因死亡率以及与寿命的关系

引用

美国医学会杂志（中文版） 2001年第2期20卷 67-71页

作者：朱庆磊 jeremiah Stamler

背景:根据中年人群（40～64岁）观察性和干预性资料，血清胆固醇水平为冠心病（CHD）发病的主要危险因素。然而，对青年人群这方面的研究有限，对于在青年人检测和治疗高胆固醇血症的价值仍有争议。目的：评估高血清胆固醇水平对冠心病... 详细信息

背景:根据中年人群（40～64岁）观察性和干预性资料，血清胆固醇水平为冠心病（CHD）发病的主要危险因素。然而，对青年人群这方面的研究有限，对于在青年人检测和治疗高胆固醇血症的价值仍有争议。目的：评估高血清胆固醇水平对冠心病（CHD）、心血管疾病（CVD）和所有原因死亡危险的长期影响。设计、地点和参试者：从三项前瞻性研究，选择3组曾测定基线血清胆固醇水平的青年男性队列。参试人员均无糖尿病和心肌梗死病史。其中11 017例为参加1967～1973年芝加哥工业心脏病协会检测计划（CHA）的男性，年龄18～39岁；1 266例为参加1959～1963年煤气公司研究（PG）的男性，年龄25～39岁；另外，69 205例为参加1973～1975年多危险因素干预试验（MRFIT）筛检的男性，年龄35～39岁。

关键词：冠心心血管疾病死亡率寿命男性基线血清胆固醇

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：