检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

面向大规模增强确定性网络架构及验证

电信科学 2024年第1期40卷 152-161页

作者：徐军刘爱华孔国权熊泉温州市铁路与轨道交通投资集团有限公司浙江温州325000 中兴通讯股份有限公司广东深圳518052

确定性网络相比传统IP网络的“尽力而为”服务提供确定性服务质量保证,满足日益增长差异化的IP业务承载要求。在以太网局域和IP限制域网络,IEEE和IETF国际标准组织分别成立了时间敏感网络和确定性网络工作组,并发布了系列标准。目前,产... 详细信息

确定性网络相比传统IP网络的“尽力而为”服务提供确定性服务质量保证,满足日益增长差异化的IP业务承载要求。在以太网局域和IP限制域网络,IEEE和IETF国际标准组织分别成立了时间敏感网络和确定性网络工作组,并发布了系列标准。目前,产业界已经开展面向大规模确定性网络的研究,已经有共识需要对确定性网络技术进行必要的增强,发展新的增强确定性网络架构。在IETF确定性网络架构基础上提出了一种三维增强确定性网络架构,并基于该架构研制的原型样机进行了测试验证,验证结果显示,该架构满足大规模确定性网络的需求并具备很好的兼容性。

关键词：增强确定性网络增强确定性网络架构增强确定性网络验证

北京艺术中心项目大跨度弧形金属板吊顶全过程实施工艺

在线全文

学校读者我要写书评

暂无评论

建筑技术 2024年第12期55卷 1519-1521页

作者：杨钰鹏赵毅刘长来贾文荣熊全明北京建院装饰工程设计有限公司北京100052

依托北京艺术中心项目,在技术策划阶段融合新工艺、新技术、新理念,对超高大板块金属吊顶全过程实施工艺进行研究,分析如何将大体量金属板吊顶工艺运用好、施工好。根据建筑模型将吊顶工艺、效果重新绘制模型分布图纸,同时利用现场空间... 详细信息

依托北京艺术中心项目,在技术策划阶段融合新工艺、新技术、新理念,对超高大板块金属吊顶全过程实施工艺进行研究,分析如何将大体量金属板吊顶工艺运用好、施工好。根据建筑模型将吊顶工艺、效果重新绘制模型分布图纸,同时利用现场空间实测数据,反提设计,将模型尺寸与现场高度匹配,同时利用供应商的分解能力,将模型中单曲、双曲、规格板分类,并消化累计误差控制加工精度,先安装统一定位,划分各位置高程,连成高程网格,中间往两边分解,最后用边缘板块分解误差,通过一系列控制达到装饰效果,给项目增值,给同类工程提供依据。

关键词：大板块金属板模型控制高程网格

Experimental study on temperature fluctuations on plate surface induced by coaxial-jet flow

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第5期35卷 139-153页

作者： Xue-Yao xiong Zun-quan Liu Guo-Yan Zhou Xing Luo Shan-Tung Tu Key Laboratory of Pressure Systems and Safety(MOE) East China University of Science and TechnologyShanghai 200237China Institute of Thermodynamics Gottfried Wilhelm Leibniz University Hannover30823 GarbsenGermany

In nuclear reactors,temperature fluctuations of fluids may cause fatigue damage to adjacent structures;this is referred to as thermal *** on thermal striping in the upper plenum has mainly focused on fluid *** experimental studies have been reported on solid structures in a fluid field with a coaxial *** study entailed an experimental study of the temperature fluctuations in the fluid and on a plate surface caused by a coaxial *** temperature fluctuations of the fluid and plate surfaces located at different heights were *** cause of the temperature fluctuation was analyzed using a transient temperature *** results show that the mixing of the hot and cold fluids gradually becomes uniform in the positive axial *** average surface temperatures tended to be *** the jet reaches the plate surface,the swing of the jet center,contraction and expansion of the cold jet,and changes in the jet shape result in temperature *** intensity of the temperature fluctuation was affected by the *** attention should be paid when the plate is located at a lower height,and between the hot and cold-fluid nozzles.

关键词： Temperature fluctuation Thermal striping Coaxial jet Thermal mixing The upper plenum of nuclear reactor

Bile acids and their receptors: Potential therapeutic targets in inflammatory bowel disease

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第27期29卷 4252-4270页

作者： xiong-quan Long Ming-Zhu Liu Zi-Hao Liu Lv-Zhou Xia Shi-Peng Lu Xiao-Ping Xu Ming-Hao Wu Department of Gastroenterology The First Affiliated Hospital of Hunan Normal University(Hunan Provincial People's Hospital)Changsha 410005Hunan ProvinceChina

Chronic and recurrent inflammatory disorders of the gastrointestinal tract caused by a complex interplay between genetics and intestinal dysbiosis are called inflammatory bowel *** a result of the interaction between the liver and the gut microbiota,bile acids are an atypical class of steroids produced in mammals and traditionally known for their function in food *** the development of genomics and metabolomics,more and more data suggest that the pathophysiological mechanisms of inflammatory bowel disease are regulated by bile acids and their *** acids operate as signalling molecules by activating a variety of bile acid receptors that impact intestinal flora,epithelial barrier function,and intestinal *** bowel disease can be treated in new ways by using these potential *** paper mainly discusses the increasing function of bile acids and their receptors in inflammatory bowel disease and their prospective therapeutic *** addition,we explore bile acid metabolism and the interaction of bile acids and the gut microbiota.

关键词： Bile acids Inflammatory bowel disease Intestinal immunology Bile acid receptors Bile acid metabolism Gut microbiota

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

士绅与革命:关于丁玲家事、家史的释读

现代中文学刊 2023年第3期 26-32页

作者：熊权中央民族大学文学院

丁玲出生于湖南传统士绅家庭,相关的记忆、认知深刻影响了她的文学创作。从继承转化士绅历史文化的角度看来,丁玲书写农村革命不拘于既定的“斗地主”模式,自有独特性和复杂性。丁玲既是共产革命党人也是“绅士阶级的逆子贰臣”,她言说... 详细信息

丁玲出生于湖南传统士绅家庭,相关的记忆、认知深刻影响了她的文学创作。从继承转化士绅历史文化的角度看来,丁玲书写农村革命不拘于既定的“斗地主”模式,自有独特性和复杂性。丁玲既是共产革命党人也是“绅士阶级的逆子贰臣”,她言说家事、家史不仅关涉家族记忆、个人传记而且反映传统士绅阶层卷入现代化进程的震荡变化。以丁玲为个案,可以看到革命与士绅之间并非二元对立而具有斩而不断的复杂关联,反映了左翼文学承传统而变的特点。

关键词：丁玲家族士绅革命左翼文学

Novel hyperbranched polyimides from 2,6,12-triaminotriptycene

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第9期19卷 1127-1130页

作者： Zhen Xu Xing quan xiong Lin Cheng Department of Materials Science ＆ Engineering Huaqiao University Quanzhou 362021 China

The monomer 2,6,12-triaminotriptycene was synthesized and the structure was confirmed by IR and 1H NMR spectra. Hyperbranched polyimides modified with different terminal groups were obtained from precursors, anhydride- and aminoterminated hyperbranched poly（amic acid）s from polymerization of A2 ＋ B3 system. From gel permeation chromatograrn （GPC） characterization, representative products had high molecular weight. All polymers had good solubility in CHCl3, DMF and tetrahydrofuran （THF）, and performed no detective Tgs in the range of 50-300 ℃ and high Tds above 455 ℃ when 5% weight loss.

关键词： Triptycene Hyperbranched polymer Polyimides

立足本土的“突变”:郭沫若与20世纪20年代社会科学思潮

在线全文

学校读者我要写书评

暂无评论

首都师范大学学报（社会科学版） 2022年第4期 124-129页

作者：熊权中央民族大学文学院

郭沫若在20世纪20年代发生“突变”,从提倡抒情诗学转向鼓吹革命的文学与思想,现实生活中则发生了文人从军、流亡日本等变化。“突变”种种看似前后不一甚至自相矛盾,却贯穿着从本土语境出发来接受外来理论的思路。这种立足本土的方法,... 详细信息

郭沫若在20世纪20年代发生“突变”,从提倡抒情诗学转向鼓吹革命的文学与思想,现实生活中则发生了文人从军、流亡日本等变化。“突变”种种看似前后不一甚至自相矛盾,却贯穿着从本土语境出发来接受外来理论的思路。这种立足本土的方法,是20世纪20年代社会科学思潮承五四新文化运动的发展和转折。对郭沫若个人而言则促其得风气之先,成为中国马克思主义史学的先锋。

关键词：《社会组织与社会革命》《中国古代社会研究》国民革命

NUMERICAL ANALYSIS OF THE UNSTEADY FORCE IN INSECT FORWARD FLIGHT

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2006年第2期18卷 143-147页

作者： ZHA xiong-quan LU Xi-yun YIN Xie-zhen Department of Mechanics and Mechanical Engineering University of Science and Technology of China Hefei 230026 China

The objective of this study is to get into physical insights to the unsteady force and the relevant mechanisms in forward flight of insects. Unsteady force in the forward flight was studied, based on a virtual model problem of a foil with oscillating translation and rotation in a uniform flow, by solving the two-dimensional incompressible Navier-Stokes equations with a finite element method. The effects of typical parameters, including the advance ratio, the inclined angle of stroke plane, the stroke amplitude, and the amplitude of pitching angle of attack, on the forces and the flow structures were analyzed.

关键词： unsteady flow vortex dynamics thrust and lift,flapping motion biomechanics

High-resolution neutronics model for ^(238)Pu production in high-flux reactors

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第5期35卷 226-236页

作者： Qing-quan Pan Qing-Fei Zhao Lian-Jie Wang Bang-Yang Xia Yun Cai Jin-Biao xiong Xiao-Jing Liu School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610200China

We proposed and compared three methods(filter burnup,single energy burnup,and burnup extremum analysis)to build a high-resolution neutronics model for 238Pu production in high-flux *** filter burnup and single energy burnup methods have no theoretical approximation and can achieve a spectrum resolution of up to~1 eV,thereby constructing the importance curve and yield curve of the full energy *** burnup extreme analysis method combines the importance and yield curves to consider the influence of irradiation time on production efficiency,thereby constructing extreme *** three curves,which quantify the transmutation rate of the nuclei in each energy region,are of physical significance because they have similar distributions.A high-resolution neutronics model for ^(238)Pu production was established based on these three curves,and its universality and feasibility were *** neutronics model can guide the neutron spectrum optimization and improve the yield of ^(238)Pu by up to 18.81%.The neutronics model revealed the law of nuclei transmutation in all energy regions with high spectrum resolution,thus providing theoretical support for high-flux reactor design and irradiation production of ^(238)Pu.

关键词： ^(238)Pu Neutronics model High-flux reactor Spectrum resolution Spectrum optimization