检索结果-南通市图书馆

Photonics Research 2016年第2期4卷 45-48页

作者： Z.Y.Xu Y.h.Li L.J.Wang Joint Institute for Measurement Science Tsinghua University Shanghai Institute of Laser Plasma State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University

We demonstrated long-period grating(LPG) inscription on polymer functionalized optical microfibers and its applications in optical sensing. Optical microfibers were functionalized with ultraviolet-sensitive polymethyl methacrylate jackets and, thus, LPGs could be inscribed on optical microfibers via point-by-point ultraviolet laser exposure. For a 2 mm long microfiber LPG(MLPG) inscribed on optical microfibers with a diameter of 5.4 μm, a resonant dip of 15 d B at 1377 nm was observed. This MLPG showed a high sensitivity of strain and axial force, i.e.,-1.93 pm∕με and-1.15 pm∕μN, respectively. Although the intrinsic temperature sensitivity of the LPGs is relatively low, i.e.,-12.75 pm∕°C, it can be increased to be-385.11 pm∕°C by appropriate sealing. Benefiting from the small footprint and high sensitivity, MLPGs could have potential applications in optical sensing of strain,axial force, and temperature.

关键词： MLPG Long-period grating inscription on polymer functionalized optical microfibers and its applications in optical sensing

STUDY ON hOT SAND COOLING EQUIPMENT WITh DAMPING SAND CASCADE AND VERTICAL SPOUTED-FLUIDIZED BED

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5期18卷 669-673页

作者： L. C. Wang F. Wang X.h. You Department of Material Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

A new kind of hot sand cooling equipment with vertical spouted-fluidized bed is developed in this paper. It is similar to the traditional horizontal vibrating fluidized boiling cooler in principle but different from it in structure. The processing principle of the cooler is analyzed. The influence of main structural and processing parameters on the cooling effect and its mechanism are researched. Other characteristics of the cooler are discussed also. Experiment results show that the cooling efficiency η is equal to or larger than 83%, the temperature of output sand is less than 40℃ with the temperature of input sand is about between 80 and 90℃, and the productivity is 5t/ （h·m）

关键词： hot sand cooling fluidized bed foundry equipment

Ultraviolet Radiation Aging of Tafpack-Super Modified Porous Asphalt Concrete

在线全文

学校读者我要写书评

暂无评论

武汉理工大学学报 2010年第17期32卷 206-209页

作者： hONG W h WU S P XIE J CCCC Second highway Engineering Co.Ltd Xi'an 710000China Key Laboratory of Silicate Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

Ultraviolet aging of porous asphalt concrete is more serious than that of dense-grade concrete,attributing to its relatively high air void structure. And Tafpack-Super (TPS) is widely used as an asphalt viscosifier. For the purpose of determining the effect of TPS content on resistance to ultraviolet aging,TPS powder was added to base asphalt in various weight ratios (0%,4%,8%,12% and 16%). After mixing,the loose mixtures were short-term aged and then put in the Indoor Accelerated Ultraviolet Radiation Aging Oven for several particular times and then were compacted by Gyratory Compactor at 20%±2% air void. The specimens were tested and recorded by means of indirect tensile strength (ITS) to quantify the aging extent. The results show that 8% TPS by weight is the optimum content of base asphalt on resistance to ultraviolet aging. And the ITS of mixtures with different binder reach a peak value for approximately 2 h ultraviolet irradiation.

关键词： tafpack-super ultraviolet radiation ageing indirect tensile strength

Movements and home range of a common species of tree-shrew,Tupaia glis,surrounding houses of otoacariasis cases in Kuantan,Pahang,Malaysia

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2010年第6期3卷 427-434页

作者： Mariana A Shukor MN Muhd Norhazizi h Intan Nurlemsha B ho TM Acarology Unit Infectious Diseases Research CentreInstitute for Medical Research50588 Kuala LumpurMalaysia School of Environmental and Natural Resources Sciences Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia

Objective:To document movement patterns,home range,nesting behaviour and social organization of 5 individuals(3 males and 2 females) of a common species of tree-shrew,Tupaia glis(***) surrounding houses of otoacariasis ***:Each shrew was fitted with a transmitter chip radio-collar which operates between the frequencies of 154.13 Mhz to 154.21 *** transmitter was then tracked with a Portable Telemetry Receiver(Sirtrack,New Zealand) fitted with a 3-element Yagi *** shrews were located using standard methods of ground-based *** location was taken from at least 2 directional fixes and a minimum of 3 compass *** were taken hourly for each collared individual from the time of emergence from nest(beginning of activity) till time of entry into the nest(end of activity) every day for 5 to 7 continuous *** series of radio telemetry observations were carried *** bearings,time and positions of an observer were recorded and later plotted on a graph paper in order to derive coordinates of the collared animal.[These coordinates then analyzed using Ecological Software Solutions(Biotas Version 1.03)].Results:Nests were found in a jack fruit tree,long bushes,and 2 *** telemetry detections demonstrated 2 individuals of different sex having nests(or a nest) in the same *** shrews emerged from and returned to their nests between 0601 to 0659 hours and 1901 to 1959 hours,respectively. Both the time of exit from and entry into nest were the same between sexes(P>0.05).Their average total active period was 4.90 to 7.00 hours with a total daily travel distant of 270 m to 382 m.A male and a female shrew can move as far as 3 285 m and 4 591 m,*** movements of *** were during *** regularly entered some houses in the area during day and night except for one individual which visited during daytime *** sizes of home range and core area for the shrews were 2.00-3.40 ha and 0.05-0.4

关键词： Movements home range Tree-shrew Otoacariasis cases Malaysia

Acoustic Supercoupling in a Zero-Compressibility Waveguide

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research 2019年第1期2019卷 1086-1095页

作者： h.Esfahlani M.S.Byrne M.McDermott A.Alù Photonics Initiative Advanced Science Research CenterCity University of New YorkNew York CityNY 10031USA Department of Electrical and Computer Engineering Te University of Texas at AustinAustinTX 78712USA Electrical Engineering Institute Ecole Polytechnique Fed´erale de Lausanne(EPFL)CH-1015 LausanneSwitzerland Naval Surface Warfare Center Carderock Division West BethesdaMD 20817USA Physics Program Graduate CenterCity University of New YorkNew York CityNY 10026USA Department of Electrical Engineering City College of New YorkNew York CityNY 10031USA

Funneling acoustic waves through largely mismatched channels is of fundamental importance to tailor and transmit sound for a variety of *** electromagnetics,zero-permittivity metamaterials have been used to enhance the coupling of energy in and out of ultranarrow channels,based on a phenomenon known as *** metamaterial channels can support total transmission and complete phase uniformity,independent of the channel length,despite being geometrically mismatched with their input and output *** the feld of acoustics,this phenomenon is challenging to achieve,since it requires zero-density metamaterials,typically realized with waveguides periodically loaded with membranes or *** to electromagnetics,the additional challenge is due to the fact that conventional acoustic waveguides do not support a cut-of for the dominant mode of propagation,and therefore zero-index can be achieved only based on a collective resonance of the loading *** we propose and experimentally realize acoustic supercoupling in a dual regime,using a compressibility-nearzero acoustic *** than engineering the channel with subwavelength inclusions,we operate at the cut-of of a higherorder acoustic mode,demonstrating the realization and efcient excitation of a zero-compressibility waveguide with efective sof *** experimentally verify strong transmission through a largely mismatched channel and uniform phase distribution,independent of the channel *** results open interesting pathways towards the realization of extreme acoustic parameters and their implementation in relevant applications,such as ultrasound imaging,acoustic transduction and sensing,nondestructive evaluation,and sound communications.

关键词： waveguide coupling realization

Wave Interaction with an Emerged Porous Media

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2014年第5期6卷 680-692页

作者： I.Magdalena S.R.Pudjaprasetya L.h.Wiryanto Industrial&Financial Mathematics Research Group Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungIndonesiaJalan Ganesha 10BandungWest JavaIndonesia

In this paper,we study wave interaction with an emerged porous *** governing equation is shallow water equations with a friction term of the linearized Dupuit-Forcheimer’s *** the continuity of surface and horizontal flux,we derived the wave reflection and transmission coefficient *** are similar with the corresponding formulas of the submerged solid bar *** solve the equations numerically using finite volume method on a staggered *** numerical wave reduction in the porous media confirms the analytical wave transmission curve.

关键词： Emerged porous media shallow water equation wave transmission coefficient wave reflection coefficient

Sonochemical Decolorization of Methyl Orange in Aqueous Solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2006年第5期23卷 127-130页

作者：邢铁玲 Chu K.h. 陈国强 School of Material Engineering Soochow University Department of Chemical and Process Engineering University of Canterbury New Zealand

甲又橘子的 sonochemical decolorization 用 1.4 厘米直径角用 24 khz 超声设备被学习。ph，力量密度， ph 的效果和 decolorization 上的力量密度被讨论。联合效果在 decolorization 上散发时间，染料的起始的集中和 Fe2+ 的增加用反... 详细信息

甲又橘子的 sonochemical decolorization 用 1.4 厘米直径角用 24 khz 超声设备被学习。ph，力量密度， ph 的效果和 decolorization 上的力量密度被讨论。联合效果在 decolorization 上散发时间，染料的起始的集中和 Fe2+ 的增加用反应被学习表面方法论。结果证明因素的中央合成设计成功地为结果的试验性的设计和断言被采用。Atph = 2.8， T=30，力量 denstity= 2 mg/L 的 300 W/L 和 Fe2+ ， 5 mg/L 染料答案的 decolorization 百分比在染料的 decolorization 的 60 min 超声 *** 率以后到达了 96% 极大地面对 Fe2+ 被改进。染料的 sonolysis 跟随了一阶的动力学。

关键词：水溶解甲基声化学染色技术

The burden of mental health in lymphatic filariasis

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2015年第1期4卷 275-282页

作者： Thanh G.N.Ton Charles Mackenzie David h.Molyneux Precision health Economics 55512 th AvenueSuite 1650OaklandCA 94607USA Filariasis Programmes Support Unit Department of ParasitologyLiverpool School of Tropical MedicinePembroke PlaceLiverpool L35QAUK LSTM NTDs Department of ParasitologyLiverpool School of Tropical MedicinePembroke PlaceLiverpool L35QAUK

Background:Neglected Tropical Diseases(NTDs)afflict around one billion individuals in the poorest parts of the world with many more at *** filariasis is one of the most prevalent of the infections and causes significant morbidity in those who suffer the clinical conditions,particularly lymphedema and *** illness has been recognised as a prevalent disability in those with the disease because of the stigmatising nature of the *** estimates of the burden of depressive illness of any neglected tropical disease have been undertaken to date despite the recognition that such diseases have major consequences for mental health not only for patients but also their ***:We developed a mathematical model to calculate the burden of Disability-Adjusted Life Years(DALY)attributable to depressive illness in lymphatic filariasis and that of their caregivers using standard methods for calculating *** of numbers with clinical disease was based on published estimates in 2012 and the numbers with depressive illness from the available ***:We calculated that the burden of depressive illness in filariasis patients was 5.09 million disability-adjusted life years(DALYs)and 229,537 DALYs attributable to their *** figures are around twice that of 2.78 million DALYs attributed to filariasis by the Global Burden of Disease study of ***:Lymphatic filariasis and other neglected tropical diseases,notably Buruli Ulcer,cutaneous leishmaniasis,leprosy,yaws,onchocerciasis and trachoma cause significant co morbidity associated with mental illness in *** to assess the prevalence of the burden of this co-morbidity should be incorporated into any future assessment of the Global Burden of neglected tropical *** prevalence of depressive illness in caregivers who support those who suffer from these conditions is *** assessments are critical for neglected tropical diseases whi

关键词： Lymphatic filariasis Mental health Global burden of disease DALYS Filariasis morbidity Caregivers

A generalization of （G＇/G）-expansion method and its application to nonlinear reaction-diffusion equations arising in mathematical biology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2014年第3期7卷 41-50页

作者： A. Jabbari J. Manafian heris h. Kheiri A. Bekir Department of Applied Mathematics University of Tabriz 29 Bahman St. Tabriz-Iran Mathematics and Computer Sciences Department Eskisehir Osmangazi University 26480 Eskisehir Turkey

In this paper, by introducing a proper transformation, the (G′/G)-expansion method is further extended into the nonlinear reaction–diffusion equations in mathematical biology whose balancing numbers may be negative integer. As a result, hyperbolic function solutions and trigonometric function solutions with free parameters are obtained. When the parameters are taken as special values the solitary wave solutions and the periodic wave solutions are also derived from the traveling wave solutions. Moreover, it is observed that the suggested techniques is compatible of such problems.

关键词：非线性反应扩散方程数学生物学三角函数解应用生物数学自由参数周期波解孤立波解

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

洋葱状炭纳米粒子的无催化剂合成(英文)

新型炭材料 2010年第1期25卷 1-8页

作者： M. Bystrzejewski M.h. Rummeli T. Gemming h. Lange A. huczko Dept of Chemistry Warsaw University Pasteur 1 str. 02-093 Warsaw Poland IFW Dresden Helmholtzstr. 20 01069 Dresden Germany

描述了基于NaN3-C6Cl6混合物热解一步合成洋葱状碳纳米粒子的方法。应用EMS,XRD,Ramans研究了缓冲气体(Ar或空气)对炭产物的得率、形貌和结构的影响。产物包含洋葱炭、非晶碳和NaCl,通过简单的纯化处理即可完全除去副产物。洋葱状炭纳... 详细信息

描述了基于NaN3-C6Cl6混合物热解一步合成洋葱状碳纳米粒子的方法。应用EMS,XRD,Ramans研究了缓冲气体(Ar或空气)对炭产物的得率、形貌和结构的影响。产物包含洋葱炭、非晶碳和NaCl,通过简单的纯化处理即可完全除去副产物。洋葱状炭纳米粒子的形成由热解过程中压力迅速增加产生的震动波诱导苯基活性分子合并所制。

关键词：碳纳米洋葱热解气相反应 XRD Raman光谱