检索结果-南通市图书馆

Neural Regeneration Research 2025年第3期20卷 819-820页

作者： Rayudu Gopalakrishna jennifer Aguilar Emily lee William j.Mack Department of Integrative Anatomical Sciences Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCAUSA Department of Neurological Surgery Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCAUSA

The dietary polyphenolic compounds resveratrol and quercetin prevent neurodegenerative diseases in experimental models;however, they reach the brain only in nanomolar concentrations in the glucuronidated and sulfated ... 详细信息

关键词： resveratrol molar dated

在线全文

学校读者我要写书评

暂无评论

代谢综合征和脑内动脉粥样硬化性卒中的关系

世界核心医学期刊文摘（神经病学分册） 2005年第12期1卷 52-52页

作者： Kim j.W. lee j.h. 周永

To investigate the impact of metabolic syndrome (MetSD)-on the development of intracranial atherosclerotic stroke, the authors evaluated the components of the MetSD in 512 patients with stroke. The MetSD was observed most frequently in patients with intracranial atherosclerosis (p = 0.007). In multiple regression analysis, the MetSD, but not conventional risk factors, was independently associated with intracranial atherosclerosis (p = 0.005). The results suggest that treatment of metabolic abnormalities may be an important prevention strategy for intracranial atherosclerosis.

关键词：代谢综合征粥样硬化性多元回归分析

继发于颅底假单胞菌属感染的第Ⅵ及第Ⅹ脑神经麻痹

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（眼科学分册） 2005年第9期1卷 21-21页

作者： Kulkarni S. lee A. lee j.h. 宋虎平 Department of Ophthalmology Univ. of Iowa Hospitals and Clinics 200 Hawkins Drive PFP Iowa City IA 52242 United States Dr.

PURPOSE: To describe skull base osteomyelitis, an uncommon complication of chronic otitis media in the post-antibiotic era, as a cause for diplopia. DESIGN: Case report. METhODS: The records of a patient with skull base osteomyelitis were reviewed. RESULTS:Apatient presentedwith a sixth nerve palsy and tenth nerve palsy. Magnetic resonance imaging, bone scan, and gallium scan were helpful in establishing the diagnosis. Cultures grew Pseudomonas. The treatment required longterm intravenous antibiotics. CONCLUSIONS: Pseudomonas skull-based osteomyelitis can produce a sixth nerve palsy as a result of the involvement of the clivus. Although uncommon in the post-antibiotic era, early recognition, appropriate diagnostic testing, and aggressive systemic antibiotic treatment might prevent permanent neurologic sequel.

关键词：假单胞菌属感染脑神经麻痹影像学检查后抗生素时代大剂量抗生素神经系统后遗症慢性中耳炎骨扫描

Computational Analysis of a Variable Ejector Flow

在线全文

学校读者我要写书评

暂无评论

journal of Thermal Science 2006年第2期15卷 140-144页

作者： h.D. KIM j.h. lee T. SETOGUChI S.MATSUO School of Mechanical Engineering Andong National University 388 Songchun-dong Andong 760-749 Korea Department of Mechanical Engineering Saga University 1 Honjo Saga 840-8502 Japan

The present study addresses a variable ejector which can improve the ejector efficiency and control the re-circulation ratio under a fixed operating pressure ratio. The variable ejector is a facility to obtain specific recirculation ratio under a given operating pressure ratio by varying the ejector throat area ratio. The numerical simulations are carried out to provide an understanding of the flow characteristics inside the variable ejector. The sonic and supersonic nozzles are adopted as primary driving nozzles in the ejector system, and a movable cone cylinder, inserted into a conventional ejector-diffuser system, is used to change the ejector throat area ratio. The numerical simulations are based on a fully implicit finite volume scheme of the compressible, Reynolds-Averaged Navier-Stokes equations. The results show that the variable ejector can control the recirculation ratio at a fixed operating pressure ratio.

关键词： variable ejector ejector throat area ratio re-circulation ratio

EXPERIMENTAL RESEARCh OF CYLINDER TO BED hEAT TRANSFER IN AGITATED FLUIDIZED BEDS

在线全文

学校读者我要写书评

暂无评论

journal of hydrodynamics 2000年第4期12卷 36-40页

作者： Ma, j.h. Dep. of Air-condition Eng. Shandong Inst. of Archit. and Eng. Jinan 250014 China

Cylinder-to-bed heat transfer in agitated fluidized beds was studied experimentally. In the experiments, the aluminum particles were used as bed material, the diameter of those ranged from 0.5 mm to 2 mm. The effects of gas velocity, particles size, and agitator rotary speed on heat transfer were studied. From the experimental results, we have come to the following conclusion: (1) there are optimal ranges for airflow velocity and rotary speed to get optimal heat transfer coefficient; (2) the cylinder-to-bed heat transfer is greatly affected by gas velocity, rotary speed and particles sizes, and the effect of rotary speed on heat transfer is similar to that of gas velocity; (3) higher heat transfer coefficient is obtained with smaller particles.

关键词： Fluidized beds heat transfer Mass transfer Two phase flow

Ab initio STUDIES ON MAGNETISM OF 3d TRANSITION METAL DIMERS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2007年第5期20卷 341-346页

作者： j.h. Gu Z.L. Zhu School of Physical Engineering and Material Physics Laboratory Zhengzhou University Zhengzhou 450052 China

Ab initio calculations with the self-consistent full-potential linearized augmented-plane-wave method （FLAPW）, under generalized gradient approximation, have been carried out to describe the electronic and magnetic properties of 3d transition metal dimers. It predicted the antiferromagneticity of Cr2 and ferromagneticity of other species. The Mn2 dimer was shown to be ferromagnetic coupling with a local magnetic moment of 5μB. retaining the value of its free atom state. The V2 and Ni2 exhibited low spin-polarization with local magnetic moment of only 1μB per atom. On the other hand, Fe2 and Co2 were highly spin-polarized with local magnetic moments of 3 and 2μB.

关键词： magnetism 3d transition metal dimer ab initio calculation

Electromagnetoelastic behaviors of functionally graded piezoelectric solid cylinder and sphere

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2007年第1期23卷 55-63页

作者： h. L. Dai Y.M. Fu j.h. Yang Department of Engineering Mechanics Hunan University Changsha 410082 China

Analytical studies on electromagnetoelastic behaviors are presented for the functionally graded piezoelectric material （FGPM） solid cylinder and sphere placed in a uniform magnetic field and subjected to the external pressure and electric loading. When the mechanical, electric and magnetic properties of the material obey an identical power law in the radial direction, the exact displacements, stresses, electric potentials and perturbations of magnetic field vector in the FGPM solid cylinder and sphere are obtained by using the infinitesimal theory of electromagnetoelasticity. Numerical examples also show the significant influence of material inhomogeneity. It is interesting to note that selecting a specific value of inhomogeneity parameter β can optimize the electromagnetoelastic responses, which will be of particular importance in modern engineering designs.

关键词： Functionally graded piezoelectric material (FGPM) Electromagnetoelastic Solid cylinder Solid sphere Perturbation of magnetic field vector

DRYING OF GRANULAR MATERIALS IN AGITATED FLUIDIZED BED

在线全文

学校读者我要写书评

暂无评论

journal of hydrodynamics 2001年第2期13卷 29-31页

作者： Ma, j.h. Liu, h. Feng, D.Z. Dept. of Air-Condition Eng. Shandong Inst. of Civil Eng. Jinan 250014 China

An experimental study of the drying characteristics of an agitated fluidized bed dryer is presented and discussed. In the study, the citric acid particles were used as bed material with the diameters ranging from 0.2 mm to 1.3 mm. The variables affecting apparently the drying rate were found to be the mass flow rate, the inlet air temperature, the rotary speed of agitating mechanism and the particles feed rate. Comparing with other variables considered, mass flow rate was found to have the least important influence on the drying rate. The agitated fluidized bed dryer is suitable to drying agglomerating or sticky materials.

关键词： Dryers (equipment) Drying Experiments Mass transfer

STUDY ON PTA CLAD (Cr,Fe)_7C_3/γ-Fe CERAMAL COMPOSITE COATING

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2005年第6期18卷 695-700页

作者： j.B. Liu j.h. huang L.M. Wang Department of Mechanical and Electronic Engineering Weifang University Weifang 261061 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

A wear resistant （Cr, Fe）7C3/γ-Fe ceramalcomposite coating wasfabricatedon substrate of a 0.45% C carbon steel by plasma transferred arc （PTA） cladding process using the Fe-Cr-C elemental powder blends. The microstructure, microhardness and dry sliding wear resistance of the coating were evaluated. Results indicate that the plasma transferred arc clad ceramal composite coating has a rapidly solidified microstructure consisting of blocky primary （Cr, Fe）7C3 and the interblocky （ Cr, Fe）7C3/γ-Fe eutectics and is metallurgically bonded to the 0.45%C carbon steel substrate. The ceramal composite coating has high hardness and excellent wear resistance under dry sliding wear test condition.

关键词： plasma transferred arc ( PTA ) cladding ( Cr Fe )7C3/γ-Fe coating,microstructure wear

Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao Li hong Zhou Zhihao Ren Cheng Xu Chengkuo lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano *** characteristics represent a breakthrough in SEIRA technology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of OC-hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA technology,while providing new ideas for other enhanced spectroscopy technologies,quantum photonics and studying light–matter interactions.

关键词： Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled Biosensing