检索结果-南通市图书馆

Fully integrated and broadband Si-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing

引用

photonics Research 2024年第3期12卷 I0001-I0010页

作者： VALERIO VITALI THALÍA DOMÍNGUEZ BUCIO HAO LIU jOSÉMANUEL LUQUE GONZÁLEZ FRANCISCO jURADO-ROMERO ALEjANDRO OrtEGA-MOÑUX GLENN CHURCHILL jAMES C.GATES jAMES HILLIER NIKOLAOS KALFAGIANNIS DANIELE MELATI jENS H.SCHMID ILARIA CRISTIANI pAVEL CHEBEN j.gonzalo wangüem.rt-pérez ÑIGO MOLINA-FERNÁNDEZ FREDERIC GARDES COSIMO LACAVA pERIKLIS pETROpOULOS Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Electrical Computer and Biomedical Engineering DepartmentUniversity of PaviaPavia 27100Italy Telecommunication Research Institute(TELMA) Universidad de MálagaCEI Andalucı´a TECHE.T.S.I.Telecomunicación29010 MálagaSpain School of Science and Technology Nottingham Trent UniversityNottingham NG118NSUK Department of Electrical Engineering Eindhoven University of TechnologyEindhoven 5600 MBThe Netherlands Department of Materials Science and Engineering University of IoanninaIoannina 45110Greece Centre de Nanosciences et de Nanotechnologies UniversitéParis-SaclayCNRS91120 PalaiseauFrance Advanced Electronics and photonics Research Center National Research Council CanadaOttawaOntario K1A 0R6Canada

Intermodal four-wave mixing(FWM)processes have recently attracted significant interest for all-optical signal processing applications thanks to the possibility to control the propagation properties of waves exciting distinct spatial modes of the same *** allows,in principle,to place signals in different spectral regions and satisfy the phase matching condition over considerably larger bandwidths compared to intramodal ***,the demonstrations reported so far have shown a limited bandwidth and suffered from the lack of on-chip components designed for broadband manipulation of different *** demonstrate here a silicon-rich silicon nitride wavelength converter based on Bragg scattering intermodal FWM,which integrates mode conversion,multiplexing and de-multiplexing functionalities *** system enables wavelength conversion between pump waves and a signal located in different telecommunication bands(separated by 60 nm)with a 3 dB bandwidth exceeding 70 nm,which represents,to our knowledge,the widest bandwidth ever achieved in an intermodal FWM-based system.

关键词： scattering pump modal

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

Compressive property and energy absorption characteristic of interconnected porous Mg-Zn-Y alloys with adjusting Y addition

引用

journal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： j.A.Liu S.j.Liu B.wang W.B.Sun X.j.Liu Z.W.Han College of Materials Science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for Bionics-jilin University Weihai 264205PR China

In this study,interconnected porous Mg-2Zn-xY alloys with different phase compositions were prepared by various Y additions(x=0.4,3,and 6 wt.%)to adjust the compressive properties and energy absorption *** characterization methods were then applied to identify the microstructure of the porous Mg-Zn-Y and describe the details of the second *** tests were performed at room temperature(rt),200℃,and 300℃to study the impact of the Y addition and testing temperature on the compressive properties of the porous *** experimental results showed that a high Y content promotes a microstructure refinement and increases the volume fraction of the second *** the Y content increases,different Mg-Zn-Y ternary phases appear:I-phase(Mg_(3)Zn_(6)Y),W-phase(Mg_(3)Zn_(3)Y_(2)),and LpSO phase(Mg_(12)ZnY).When the Y content ranges between 0.4%and 6%,the compressive strength increases from 6.30Mpa to 9.23 Mpa,and the energy absorption capacity increases from 7.33 Mj/m^(3)to 10.97 Mj/m^(3)at rt,which is mainly attributed to the phase composition and volume fraction of the second ***,the average energy absorption efficiency is independent of the Y *** addition,the compressive deformation behaviors of the porous Mg-Zn-Y are altered by the testing *** compressive strength and energy absorption capacity of the porous Mg-Zn-Y decrease due to the softening effect of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflect the failure mechanisms of the struts.

关键词： porous magnesium Rare earth elements Microstructure Compressive behavior Energy absorption characteristic

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

Reduction of epinephrine in the lumbar spinal cord following repetitive blast-induced traumatic brain injury in rats

引用

Neural Regeneration Research 2024年第7期19卷 1548-1552页

作者： Shigeharu Tsuda Mustafa Golam jiamei Hou Kevin K.W.wang Floyd j.Thompson prodip Bose Brain Rehabilitation Research Center Malcom Randall VA Medical CenterNorth Florida/South Georgia Veterans Health SystemGainesvilleFLUSA Department of Anesthesiology College of MedicineUniversity of FloridaGainesvilleFLUSA Department of emergency Medicine University of FloridaGainesvilleFLUSA Department of Neuroscience University of FloridaGainesvilleFLUSA Department of Neurology University of FloridaGainesvilleFLUSA

Traumatic brain inju ry-induced unfavorable outcomes in human patients have independently been associated with dysregulated levels of monoamines,especially epinephrine,although few preclinical studies have examined the epinephrine level in the central nervous system after traumatic brain *** has been shown to regulate the activities of spinal motoneurons as well as increase the heart rate,blood pressure,and blood flow to the hindlimb ***,the purpose of the present study was to determine the impact of repeated blast-induced traumatic brain injury on the epinephrine levels in seve ral function-s pecific central nervous system regions in *** three repeated blast injuries at 3-day intervals,the hippocampus,motor cortex,locus coeruleus,vestibular nuclei,and lumbar spinal cord were harvested at post-injury day eight and processed for epinephrine assays using a high-sensitive electrochemical detector cou pled with high-performance liquid *** results showed that the epinephrine levels were significantly decreased in the lumbar spinal cord tissues of blast-induced traumatic brain injury animals compared to the levels detected in age-and sex-matched sham *** other function-specific central nervous system regions,although the epinephrine levels were slightly altered following blast-induced tra u matic brain injury,they were not statistically *** results suggest that blast injury-induced significant downregulation of epinephrine in the lumbar spinal cord could negatively impact the motor and cardiovascular *** is the first repo rt to show altered epinephrine levels in the spinal cord following repetitive mild blast-induced traumatic brain injury.

关键词： balance blood flow cardiovascular system central nervous system epinephrine ischemic damage lumbar spinal cord muscle tone repeated blast spasticity traumatic brain injury

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

Towards efficient strain engineering of 2D materials:A four-points bending approach for compressive strain

引用

Nano Research 2024年第6期17卷 5317-5325页

作者： Hao Li Félix Carrascoso Ana Borrás Gloria p.Moreno Francisco j.Aparicio Ángel Barranco Andrés Castellanos Gómez Campus de Cantoblanco Instituto de Ciencia de Materiales de MadridC.Sor Juana Inés de la Cruz328049 MadridSpain Nanotechnology on Surfaces and plasma Lab Instituto de Ciencia de Materiales de Sevilla(CSIC-Universidad de Sevilla).C/Americo Vespucio 49E-41092 SevilleSpain Departamento de Física Aplicada I Escuela Politécnica SuperiorUniversidad de Sevillac/Virgen deÁfrica 7E-41011 SevilleSpain

Strain engineering,as a powerful strategy to tune the optical and electrical properties of two-dimensional(2D)materials by deforming their crystal lattice,has attracted significant interest in recent years.2D materials can sustain ultra-high strains,even up to 10%,due to the lack of dangling bonds on their surface,making them ideal brittle *** remarkable mechanical resilience,together with a strong strain-tunable band structure,endows 2D materials with a broad optical and electrical response upon ***,strain engineering based on 2D materials is restricted by their nanoscale and strain quantification *** this study,we have modified a homebuilt three-points bending apparatus to transform it into a four-points bending apparatus that allows for the application of both compressive and tensile strains on 2D *** approach allows for the efficient and reproducible construction of a strain system and minimizes the buckling effect caused by the van der Waals interaction by adamantane encapsulation *** results demonstrate the feasibility of introducing compressive strain on 2D materials and the potential for tuning their optical and physical properties through this approach.

关键词： uniaxial compressive strain polymer encapsulation differential reflectance spectroscopy exciton tunability

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

Ultra-broadband nanophotonic phase shifter based on subwavelength metamaterial waveguides

引用

photonics Research 2020年第3期8卷 359-367页

作者： DAVID GONZáLEZ-ANDRADE jOSéMANUEL LUQUE-GONZáLEZ j.gonzalo wangüem.rt-pérez ALEjANDRO OrtEGA-MONUX pAVEL CHEBEN íNIGO MOLINA-FERNáNDEZ AITOR V.VELASCO Instituto deóptica Daza de Valdés Consejo Superior de Investigaciones Cientificas(CSIC)Madrid 28006Spain Departamento de Ingenieria de Comunicaciones ETSI TelecomunicaciónUniversidad de MálagaMálaga 29071Spain National Research Council Canada Ottawa K1A 0R6Canada Bionand Center for Nanomedicine and Biotechnology Parque Tecnológico de AndaluciaMálaga 29590Spain

Optical phase shifters are extensively used in integrated optics not only for telecom and datacom applications but also for sensors and quantum *** various active solutions have been demonstrated,progress in passive phase shifters is still *** we present a new type of ultra-broadband 90°phase shifter,which exploits the anisotropy and dispersion engineering in subwavelength metamaterial *** Floquet–Bloch calculations predict a phase-shift error below 1.7°over an unprecedented operation range from 1.35 to 1.75μm,i.e.,400 nm bandwidth covering the E,S,C,L,and U telecommunication *** flat spectral response of our phase shifter is maintained even in the presence of fabrication errors up to 20 nm,showing greater robustness than conventional *** device was experimentally demonstrated using standard220 nm thick SOI wafers,showing a fourfold reduction in the phase variation compared to conventional phase shifters within the 145 nm wavelength range of our measurement *** proposed subwavelength engineered phase shifter paves the way for novel photonic integrated circuits with an ultra-broadband performance.

关键词： waveguides phase maintained

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

Sensitivity-based Vulnerability Assessment of State Estimation

引用

journal of Modern power Systems and Clean Energy 2021年第4期9卷 886-896页

作者： gonzalo E.Constante-Flores Antonio j.Conejo jiankang wang Department of Electrical and Computer Engineering The Ohio State UniversityColumbusUSA Department of Integrated Systems Engineering and the Department of Electrical and Computer Engineering The Ohio State UniversityColumbusUSA

We propose a technique to assess the vulnerability of the power system state estimation. We aim at identifying the measurements that have a high potential of being the target of false data injection attacks. From the perspective of the adversary, such measurements have the following characteristics: ① being influential on the variable estimates;② corrupting their measured values is likely to be undetected. Additionally, such characteristics should not change significantly with the system operation condition. The proposed technique provides a systematic way of identifying the measurements with such characteristics. We illustrate our methodology on a 4-bus system, the New England 39-bus system, and the IEEE 118-bus test system, respectively.

关键词： False data injection attack state estimation sensitivity analysis singular value decomposition

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

polarization-independent multimode interference coupler with anisotropy-engineered bricked metamaterial

引用

photonics Research 2022年第4期10卷 I0001-I0009页

作者： Carlos perez-Armenta Alejandro Ortega-Monux jose Manuel Luque-Gonzalez Robert Halir pedro j.Reyes-Iglesias jens Schmid pavel Cheben Inigo Molina-Fernandez j.gonzalo wanguem.rt-perez Telecommunication Research Institute(TELMA) Universidad de MalagaCEI Andalucia TECHE.T.S.I.Telecomunicacion29010 MalagaSpain Bionand Center for Nanomedicine and Biotechnology Parque Tecnologico de AndaluciaMalaga 29590Spain National Research Council Canada OttawaOntario K1A 0R6Canada

Many applications, including optical multiplexing, switching, and detection, call for low-cost and broadband photonic devices with polarization-independent operation. While the silicon-on-insulator platform is well positioned to fulfill most of these requirements, its strong birefringence hinders the development of polarizationagnostic devices. Here we leverage the recently proposed bricked metamaterial topology to design, for the first time, to our knowledge, a polarization-independent 2 × 2 multimode interference coupler using standard 220 nm silicon thickness. Our device can be fabricated with a single etch step and is optimized for the O-band,covering a wavelength range of 160 nm with excess loss, polarization-dependent loss, and imbalance below 1 dB and phase errors of less than 5°, as demonstrated with full three-dimensional finite-difference time-domain simulations.

关键词： polarization multimode multiplexing

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

Effect of full-fat sunflower or flaxseed seeds dietary inclusion on performance,egg yolk fatty acid profile and egg quality in laying hens

引用

Animal Nutrition 2020年第2期6卷 179-184页

作者： Yandy j.Aguillón-páez Laura A.Romero gonzalo j.Diaz Facultad de Ciencias Agropecuarias Universidad de CundinamarcaFusagasugá252211Colombia Facultad de Medicina Veterinaria y de Zootecnia Universidad Nacional de ColombiaBogotá111321Colombia

A study was conducted to evaluate the effect of the dietary inclusion of full-fat flaxseed of full-fat sunflower seeds on performance parameters,egg quality parameters and egg yolk fatty acid profile in laying hens.A total of 150 Babcock Brown hens at 27 weeks of age were distributed in 3 experimental treatments,as follows:T1,control;T2,diet containing 13.5% full-fat whole flaxseed seeds;and T3,diet containing 13.5% full-fat ground sunflower *** and water were provided ad libitum and the experiment lasted for 8 *** significant differences were found on egg quality parameters,but total egg production and rate of lay were significantly(p p receiving sunflower seeds compared with the control,and significant differences(p polyunsaturated,omega-6(n-6) and omega-3(n-3) fatty acids were observed,as well as in the n-6:n-3 *** results show that the dietary inclusion of 13.5% flaxseed full-fat seeds significantly increases the n-3 polyunsaturated fatty acid(pUFA) content in the eggs and lowers the n-6:n-3 ratio without affecting performance *** of full-fat sunflower seeds increases the n-6 pUFA content but affects total egg production and rate of *** studies are needed to determine the level of inclusion of full-fat sunflower seeds that does not affect performance.

关键词： Flaxseed Sunflower polyunsaturated fatty acid Laying hens Egg quality performance

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

Berberine Inhibits Ferroptosis and Stabilizes Atherosclerotic plaque through NRF2/SLC7A11/GpX4 pathway

引用

Chinese journal of Integrative Medicine 2024年第10期30卷 906-916页

作者： wang Ting-ting YU Li-li ZHENG jun-meng HAN Xin-yi jIN Bo-yuan HUA Cheng-jun CHEN Yu-shan SHANG Sha-sha LIANG Ya-zhou wang jian-ru Heart Center the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou450000China

Objective:To investigate potential mechanisms of anti-atherosclerosis by berberine(BBR)using ApoE-/-***:Eight 8-week-old C57BL/6j mice were used as a blank control group(normal),and 568-week-old AopE-/-mice were fed a high-fat diet for 12 weeks,according to a completely random method,and were divided into the model group,BBR low-dose group(50 mg/kg,BBRL),BBR medium-dose group(100 mg/kg,BBRM),BBR high-dose group(150 mg/kg,BBRH),BBR+nuclear factor erythroid 2-related factor 2(NRF2)inhibitor group(100 mg/kg BBR+30 mg/kg ML385,BBRM+ML385),NRF2 inhibitor group(30 mg/kg,ML385),and positive control group(2.5 mg/kg,atorvastatin),8 in each *** 4 weeks of intragastric administration,samples were collected and serum,aorta,heart and liver tissues were *** kits were used to detect serum lipid content and the expression levels of malondialdehyde(MDA)and superoxide dismutase(SOD)in all experimental *** pathological changes of atherosclerosis(AS)were observed by aorta gross Oil Red O,aortic sinus hematoxylin-eosin(HE)and Masson *** lipopathy was observed in mice by HE *** morphology of mitochondria in aorta cells was observed under transmission electron *** cytometry was used to detect reactive oxygen species(ROS)expression in aorta of mice in each *** content of ferrous ion Fe^(2+)in serum of mice was detected by biochemical *** mRNA and protein relative expression levels of NRF2,glutathione peroxidase 4(GpX4)and recombinant solute carrier family 7 member 11(SLC7A11)were detected by quantitative real time polymerase chain reaction(rt-q pCR)and Western blot,***:BBRM and BBRH groups delayed the progression of AS and reduced the plaque area(pphological changes of ferroptosis were rarely observed in BBR-treated AS mice,and the content of Fe^(2+)in BBR group was significantly lower than that in the model group(p<0.01).BBR decreased ROS and MDA levels in mouse

关键词： berberine ApoE−/− ferroptosis atherosclerosis oxidative stress NRF2/SLC7A11/GpX4 pathway

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

Species recognition and the divergences in the chemical and ultrasonic signals between two coexisting Rattus species

引用

Current Zoology 2024年第4期70卷 531-538页

作者： Wei-Chao wang Zhi-Ming Li Yi Chen jin-Hua Zhang jian-Xu Zhang Yao-Hua Zhang The State Key Laboratory of Integrated Management of pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAs Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina

The ability to recognize and differentiate between conspecifics and heterospecifics as well as their signals is critical for the coexistence of closely related *** the genus Rattus,species are morphologically similar and multiple species often ***,we investigated the interspecific recognition and signal differentiation of two sympatric rat species,the brown rat(Rattus norvegicus,RN)and the Asian house rat(Rattus tanezumi,rt).In a two-way choice test,both RN and rt females showed a preference for conspecific male rats to heterospecific *** females showed a significant preference for accessible urine of males of same species to those of other species,but not for the inaccessi-ble *** the other hand,there were significant differences in the structural characteristics of the ultrasonic vocalization emitted by males of these two rat *** dodecyl sulphate-polyacrylamide gel electrophoresis(SDS-pAGE)and isoelectric focusing electrophoresis unveiled that major urinary proteins(MUps)in voided urine were more highly expressed in RN males versus rt *** interspecific dif-ferences of urinary volatile compounds were also *** conclusion,female rats had the ability to distinguish between males of either species.

关键词： Asian house rats brown rats closely related species pheromones ultrasonic vocalization.

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：