检索结果-南通市图书馆

Coating particles using liquids and foams based on viscous formulations with industrial mixers: Batch operation

Particuology 2020年第3期18卷 13-24页

作者： d.Kontziampasis M.s.Manga d.W.York school of Chemical and Process Engineering Faculty of EngineeringUniversity of LeedsLS29JTLeedsW.YorkshireUK

Particle or powder coating with viscous liquids has been essential in industry for surface modification purposes to induce and enhance specific *** paper evaluates the performance of using foams (of different bubble diameters) versus liquids as a means of coating powder beds based on viscous liquid *** with viscous liquids present numerous industrial challenges and therefore preparing foam equivalents can render the liquid component weak enough (through pre shearing to form the foam),to allow it to break up and coat particles under the shear forces exerted in a mixing *** this study,two shear mixers are used;the first type consists of paddles in different configurations attached to a single rotating shaft,whilst the second type is a commercial twin screw mixer (TsM).The quality of coating achieved on the bulk powder bed using liquids and foams (stained with a dye) is assessed by image analysis to determine the homogeneity of the color *** addition,scanning electron microscopy provides a tool to further investigate the coating quality of individual particles from the bulk *** results show that large bubble (centimeter size) foams are much more effective at distributing within the fluidized powder bed compared to the starting viscous liquid and small bubble foams (submillimeter size).Furthermore,there is a maximum ratio of foam to powder beyond which agglomeration occurs and is insufficient to fully coat the *** of individual particles is achieved in the case of the TsM,whereas sEM proves that the single shaft paddle mixer crushes the particles and subsequently granulates them together to form granules of a size comparable to the size of coated particles seen after coating with the TsM.

关键词： Powder coating Viscous liquid Foam Image analysis Foam rheology surface modification

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

短柄髋关节植入物的初始与远期稳定性（二）

引用

中华骨科杂志 2011年第7期31卷 820-824页

作者： d dabirrahmani M Hogg L Kohan M gillies 悉尼澳大利亚医疗器械研究中心悉尼大学悉尼关节矫形外科中心

（四）微动分析在步骤1结束时获得重建模型的微动结果，这是重建步骤前的第一步，位于45％步态相。对植人物节点相对于骨节点法向（分离）和切向（滑动）运动场变量（在数量方面）的标定和评估，以此对骨一植入物接触界面进行分析。所... 详细信息

（四）微动分析在步骤1结束时获得重建模型的微动结果，这是重建步骤前的第一步，位于45％步态相。对植人物节点相对于骨节点法向（分离）和切向（滑动）运动场变量（在数量方面）的标定和评估，以此对骨一植入物接触界面进行分析。所有结果均在Abaqus／CAE中显示（simulia，Inc．，Pawtucket，RhodeIs—land，UsA）。

关键词：植入物稳定性髋关节重建模型运动场 CAE 微动节点

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

Temperature Effects on the Microstructures of Mg-Gd-Y Alloy Processed by Multi-direction Impact Forging

引用

Acta Metallurgica sinica(English Letters) 2020年第2期33卷 243-251页

作者： s.s.A.shah d.Wu R.s.Chen G.s.song school of Material science and Engineering Anhui University of Technology The Group of Magnesium Alloys and Their Applications Institute of Metal ResearchChinese Academy of Sciences

A high strain rate multi-directional impact forging(MdIF) was applied to a solutionized Mg-Gd-Y-Zr alloy in the temperature range of 350-500℃.Results demonstrate that the dominant deformation mode is twinning at a temperature below 400℃,whereas at a medium temperature of 450℃ considerable continuous dynamic recrystallization was promoted by{10-12} extension *** a higher temperature of 500℃,twinning activation was *** dRX grains were observed but their sizes were much bigger than those resulting from the MdIFed 50 passes at 450℃,which are ascribed to the larger grain boundary mobility and atomic diffusion at 500℃.Moreover,a non-basal weak texture was gained afterward MdIF at each temperature,which is credited to the MdIF process and the minor strain applied in each pass.

关键词： Magnesium alloys Twinning dynamic recrystallization Forging Texture

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

Non-Uniform Axial Electric Field in Argon Glow discharge Plasma

引用

Chinese Physics Letters 2006年第5期23卷 1234-1237页

作者： d. Akbar s. Bilikmen department of Physics Middle East Technical University 06531 Ankara Turkey

The non-uniform argon dc glow discharge plasma system has been constructed in a very special design to investigate the effects of variable tube radius on plasma parameters. By using isolated computer controlled three couples of a double probe （TCdP） system, the electron temperature, electron density, the reduced electric field, and electron drift velocity are measured at low and intermediate pressures. It is shown that the electron temperature and reduced electric field （density） decreases （increases） as the radius decreases, at low discharge current and pressures. For large radius regions, at high discharge currents and pressures, the behaviour of the plasma parameters of specially reduced electric field change similarly to those in a uniform discharge system.

关键词： POsITIVE-COLUMN GAs-dIsCHARGEs ION-BOMBARdMENT LANGMUIR PROBE Pd FILMs PREssURE MOdEL AR PARAMETERs

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

Non-spherical Gravitational Collapse of strange Quark Matter

引用

Chinese Physics Letters 2008年第5期25卷 1568-1570页

作者： Zade s s Patil K d Mulkalwar P N department of Mathematics J. B. College of Science Wardha India department of Mathematics B. D. College of Engineering Sewagram Wardha India department of Computer science Amolakchand Mahavidyalaya Yavatmal India

We study the non-spherical gravitational collapse of the strange quark null fluid. The interesting feature which emerges is that the non-spherical collapse of charged strange quark matter leads to a naked singularity whereas the gravitational collapse of neutral quark matter proceeds to form a black hole. We extend the earlier work of Harko and Cheng [Phys. Lett. A 266 （2000） 249] to the non-spherical case.

关键词： NAKEd sINGULARITIEs COsMIC CENsORsHIP sPACETIMEs

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

Ambipolar diffusion in direct-Current Positive Column with Variations in Radius of discharge Tube

引用

Chinese Physics Letters 2006年第9期23卷 2498-2501页

作者： d. AKBAR s. BILIKMEN department of Physics Middle East Technical University 06531 Ankara Turkey

The ambipolar diffusion and argon ion mobility as functions of the reduced electric field and pressure times the tube radius are investigated in a weakly ionized non-uniform glow discharge plasma system. In particular, the variable cross section at the same discharge tube on the ambipolar diffusion coefficient shows a more noticeable effect than the effects from the ion mobility. As the diffusion length A increases, the ambipolar diffusion da increases. However, it decreases as the discharge current is increased.

关键词： GLOW-dIsCHARGE MOdEL

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

Thermal inertia at the MsL and Insight mission sites on Mars

引用

Earth and Planetary Physics 2022年第1期6卷 18-27页

作者： d.singh s.Uttam Centre of studies in Resources Engineering Indian Institute of Technology BombayMumbaiIndia Physical Research Laboratory AhmedabadIndia

For planetary surface materials,thermal inertia is the critical property that governs the surface’s daily thermal response and controls diurnal and seasonal surface temperature *** we use the ground measurements made by the MsL Curiosity rover and the Insight lander to determine the thermal inertia of two sites on *** study compares the variation of thermal inertia during and after the Large dust storm(Lds)of Martian Year(MY)*** determine surface thermal inertia,we derive a simple approximation(using energy balance),which utilizes surface albedo,surface energy flux,and diurnal change in the surface *** average thermal inertia in MY34 is about 39.2%,3.7%,and 3.4%higher than MY35 average thermal inertia for the MsL,Insight(FOV1),and Insight(FOV2),***,the thermal inertia at the Insight(FOV1)is consistently lower by about 20 J·m^(-2)·s^(-1/2)·K^(-1) than the Insight(FOV2)site for all scenarios,indicating variation in the region’s surface *** best-fit surface albedo in MY34(determined using the KRC model)are about 0.08,0.05,and 0.03 higher than MY35 surface albedo for the MsL,Insight(FOV1),and Insight(FOV2),*** increase in both surface albedo and thermal inertia during the Lds indicates that the underlying surface is both more thermally resistant and more reflective than the overlying loose dust.

关键词： Mars Mars surface thermal inertia dust storm Mars climate

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

Multi-year MOdIs active fire type classification over the Brazilian Tropical Moist Forest Biome

引用

International Journal of digital Earth 2017年第1期10卷 54-84页

作者： d.P.Roy s.s.Kumar Geospatial sciences Center of Excellence South Dakota State UniversityBrookingsSDUSA

The Brazilian Tropical Moist Forest Biome(BTMFB)spans almost 4 million km^(2) and is subject to extensive annual fires that have been categorized into deforestation,maintenance,and forest fire *** on fire types is important as they have different atmospheric emissions and ecological impacts.A supervised classification methodology is presented to classify the fire type of MOderate resolution Imaging spectroradiometer(MOdIs)active fire detections using training data defined by consideration of Brazilian government forest monitoring program annual land cover maps,and using predictor variables concerned with fuel flammability,fuel load,fire behavior,fire seasonality,fire annual frequency,proximity to surface transportation,and local *** fire seasonality,local temperature,and fuel flammability were the most influential on the *** fire type results for all 1.6 million MOdIs Terra and Aqua BTMFB active fire detections over eight years(2003–2010)are presented with an overall fire type classification accuracy of 90.9%(kappa 0.824).The fire type user’s and producer’s classification accuracies were respectively 92.4%and 94.4%(maintenance fires),88.4%and 87.5%(forest fires),and,88.7%and 75.0%(deforestation fires).The spatial and temporal distribution of the classified fire types are presented and are similar to patterns reported in the available recent literature.

关键词： Earth observation land cover remote sensing

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

EFFECT OF sEN dEsIGN ON sURFACE FLUCTUATION ANd sOLIdIFYING sHELL IN sLAB MOLd ANd ITs OPTIMIZATION

引用

Acta Metallurgica sinica(English Letters) 2008年第5期21卷 341-350页

作者： d.F. Wu s.s. Cheng school of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

Turbulent flow and heat transfer coupled with solidification in slab continuous casting mold was studied by numerical simulation method. Volume of fluid （VOF） model is used to solve steel-air two-phase flow problem and enthalpy-porosity scheme is introduced to solve the fluid flow problem involving solidification. Contributions of various nozzle port angles and port widths and heights on the free surface fluctuation and the thickness of solidifying shell in slab mold were particularly investigated, based on which the structure of submerged entry nozzle was optimized. Flow inside the common nozzle port cannot fill the entire outlet area, having a recirculation in the upper portion of the port, which is enlarged for the nozzle port with both larger height and width. Results show that the flow in mold cavity is mainly controlled by the nozzle port angle. The increase of the angle of upper face of the port to shape a roughly streamlined inner-wall improves the effective area fraction of the nozzle, resulting in less jet impingement, weaker free surface turbulence and thicker solidifying steel shell.

关键词： slab continuous casting submerged entry nozzle Optimization Numerical simulation

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

dNA Barcoding and systematic Review of Minervaryan Frogs(dicroglossidae:Minervarya) of Peninsular India:Resolution of a Taxonomic Conundrum with description of a New species

引用

Asian Herpetological Research 2021年第4期12卷 345-370页

作者： sonali GARG s.d.BIJU systematics Lab Department of Environmental StudiesUniversity of Delhi

The genus Minervarya is among the most widely distributed,commonly occurring,and taxonomically confusing groups of dicroglossid frogs in *** studies have provided evidence that this genus contains complexes of morphologically conserved but genetically divergent taxa—some widely distributed across south and southeast Asia,and many particularly restricted to the Western Ghats region of the Indian Peninsula—posing several challenges in resolving long-standing taxonomic ***,we present a systematic review of minervaryan species found in Peninsular India,based on extensive dNA barcoding with nearly 400 samples from the entire range of the genus,including 277 new samples and topotypic material for most available names from the study area,combined with detailed morphological *** a result,we recognise 18 species in Peninsular India,including a new species described herein as Minervarya pentali *** to the comprehensive nature of the study,including comparisons with all available types,certain long-standing taxonomic uncertainties on the status of ten previously known taxa are resolved Rana(Tomopterna)parambikulamana Rao,1937(=Minervarya parambikulamana),Rana(Hylorana)sauriceps Rao,1937(=Minervarya sauriceps),and Fejervarya kudremukhensis Kuramoto,Joshy,Kurabayashi,and sumida,2008"2007"(=Minervarya kudremukhensis),are considered as junior subjective synonyms of Rana(Rana)limnocharis mysorensis Rao,1922(=Minervarya mysorensis);Nyctibatrachus sanctipdustris *** Rao,1920(=Minervarya modesta)is proposed to be a synonym of Rana limnocharis syhadrensis Annandale,1919(=Minervarya syhadrensis);while Rana murthii Pillai,1979(=Minervarya murthii)and Fejervarya mudduraja Kuramoto,Joshy,Kurabayashi,and sumida,2008"2007"(=Minervarya mudduraja)are considered as junior subjective synonyms of Rana nilagirica Jerdon,1853(=Minervarya nilagirica).At the same time,Rana brevipalmata Peters,1871(=Minervarya brevipalmata),previously known only from its ori

关键词： amphibia distribution Fejervarya integrative taxonomy Minervarya pentali sp.nov. morphology species groups Western Ghats Biodiversity Hotspot

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

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：