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SOFC的支持向量机（SVM）辨识建模

霍海娥、霍海波、杨长生2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

为了便于固体氧化物燃料电池（SOFC）的性能预测和控制方案设计，提出一种基于支持向量机（SVM）的建模方法，用具有RBF核函数的SVM建立了SOFC电池堆的非线性模型。应用仿真对所建SVM模型的有效性和精度进行了检验，并与BPNN模型的辨识效果进行了比较。仿真结果证明与BPNN模型相比，SVM模型具有较高的建模精度。该SVM辨识模型的建立，对SOFC系统的控制策略研究具有一定的实用价值。

Fuel Cells and Related MaterialsAdvanced Control Systems OptimizationAdvancements in Solid Oxide Fuel Cells

BCl_3–C_3H_6–H_2体系的热力学相图研究

刘永胜、刘善华、左新章 等 6 位作者2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

利用 FactSage software 软件计算了 BCl3–C3H6–H2体系的热力学相图,分析了反应气体分压、系统总压以及沉积温度对热力学相图中固相产物种类、分布区域及面积的影响规律与作用机制。结果表明：（1）系统总压是影响相图中固相产物种类、分布区域及其面积的最主要因素。随系统总压升高,固相产物由简到繁,相图内 B 单质区域的面积增加,B＋B4C 及 B4C＋C 区域面积减小,B4C 区域面积变化不明显,各区域明显右移;相图内气态区域面积增加。（2）反应气体分压影响相图中固相产物的元素含量。随 C3H6分压增加,固相产物由 B 含量高的产物向 C 含量高的产物转变,即由B单质或 B＋B4C 向 B4C＋C 转变。（3）在…

Molten salt chemistry and electrochemical processesThermal and Kinetic AnalysisHigh-pressure geophysics and materials

Cu-Ni-Si合金冷变形及动态再结晶行为研究

Yi Zhang、Liu Jing Ping、田保红 等 5 位作者2010-01-01功能材料

研究了时效温度和时效时间对不同冷变形条件下Cu-2.0Ni-0.5Si合金性能的影响。在Gleeble-1500D热模拟试验机上,采用高温等温压缩试验,对Cu-2.0Ni-0.5Si合金在高温压缩变形中的流变应力行为进行了研究。结果表明,合金经900℃固溶,当变形量为40%,时效温度达到450℃时,其显微硬度达到201HV,导电率达到34%IACS。随变形温度升高,合金的流变应力下降,随应变速率提高,流变应力增大。在应变温度为700、800℃时,合金热压缩变形流变应力出现了明显的峰值应力,表现为连续动态再结晶特征。从流变应力、应变速率和温度的相关性,得出了该合金高温热压缩变形时的变形激活能Q。

Copper Interconnects and ReliabilityMicrostructure and mechanical propertiesElectronic Packaging and Soldering Technologies

Hydrothermal Route to the Preparation of Diffusion Barriers on Te-based Thermoelements

方懷德2010-01-01清華大學材料科學工程學系學位論文

熱電元件的整體性能與防止焊錫與熱電材料發生反應的擴散阻絕層之結構完整性密切相關。雖然無電鍍鎳是目前業界製作熱電模組之首選材料，但是無可避免在無電鍍鎳兩端會因焊接反應以及後續操作情況下逐漸被消耗形成NiTe 與Ni3Sn4介金屬化合物，最後將進一步影響到元件的效能。本研究根據簡單置換化學反應所開發的水熱法可成功製備α-CuTe擴散阻絕層。若在焊錫中具有過量的Cu6Sn5析出物存在於焊接反應界面附近將可有效的抑制SnTe介金屬化合物的生成。然而，由於銅在碲化鉍材料的快速擴散反應，因此無法在焊錫/碲化鉍反應界面形成同樣的層狀結構。儘管如此，本研究所提出利用水熱法製備的α-CuTe層將可用來當作在沈積無電鍍鎳前於碲元素基材上所沉積的種子層。

Quantum Dots Synthesis And PropertiesAdvanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin Films

Использование радиационного регенерата изношенных диафрагм из бутилкаучука для получения гидроизоляционного кровельного материала на основе этиленпропиленового эластомера и полиэтилена

С. И. Вольфсон、Н. А. Охотина、Alexander M. Andreev 等 4 位作者2010-01-01Herald Of Technological University

Exploratory work on replacing the rubber to regenerate in the thermoelastoplastics materials based on ethylene-propylene elastomer and polyethylene was performed.

Polymer Science and ApplicationsMaterial Properties and Applications

Magnesium Oxide Nanowires Synthesized at Low Temperature by Vapor-liquid-solid Mechanism

Yunfeng Lai2010-01-01半导体光子学与技术：英文版

Magnesium oxide(MgO) nanowires were synthesized on the gold-coated Si(100) and MgO(100) substrates at lower temperature(600℃) by pulsed liquid injection metal organic chemical vapor deposition(MOCVD). The gold catalyst could be found on the tips of nanowires, which presents the vapor-liquid-solid(VLS) growth mechanis…

Magnesium Oxide Properties and ApplicationsCopper-based nanomaterials and applicationsZnO doping and properties

Прогнозирование предела выносливости упрочненных деталей при повышенной температуре

Кирпичёв Виктор Алексеевич、Саушкин Михаил Николаевич、Афанасьева Ольга Сергеевна 等 4 位作者2010-01-01CyberLeninK (CyberLeninka)

The results of fatigue testing and measurement of residual stress of surface-hardened smooth samples and samples with a notch are presented. It was established that the test mean integral residual stress can be used to predict the fatigue endurance limit of samples at elevated temperatures, using the residual stress r…

Engineering Diagnostics and ReliabilitySurface Treatment and Residual StressMaterial Properties and Applications

Теоретическое обоснование применения различных металлов для снижения износа деталей ЦПГ

И. Р. Салахутдинов、Алексей Леонидович Хохлов、А. А. Глущенко 等 4 位作者2010-01-01Вестник Ульяновской государственной сельскохозяйственной академии

The theoretical substantiation of application ofnonferrous metals for decrease in deterioration of rubbing surfaces is resulted. Dependence of factor of a friction on properties of used metal is established. The choice of a material for bimetallic surfaces is proved.

Surface Treatment and CoatingsMaterial Properties and Applications

Морфологическая кристаллография бразильских алмазов

В. И. Ракин、В. А. Петровский、А. Е. Сухарев 等 4 位作者2010-01-01Вестник института геологии Коми научного центра Уральского отделения РАН

The results of mathematical description of curvilinear surfaces of round diamonds with the use of goniometry data and determination of the major trends of form evolution of round diamonds of brazilian-uralian type have been reviewed. The diamond morphogenesis in mantle conditions is discussed.

Geological and Geochemical AnalysisDiamond and Carbon-based Materials ResearchHigh-pressure geophysics and materials

Round Robin Hydrogen Sorption Performance Characterisation of Carbon Adsorbants, Complex and Metal Hydrides

P. Moretto、Claudia Zlotea、Thomas Grube 等 5 位作者2010-01-01JuSER (Forschungszentrum Jülich)

In the frame of the European funded project NESSHY (Novel Efficient Solid State Storage for Hydrogen), three inter-laboratory comparative measurement campaigns have been undertaken for assessing the hydrogen physi- and chemi-sorption behaviour of storage materials. These Round Robin Testing (RRT) exercises aimed, in t…

Superconducting Materials and ApplicationsQuantum, superfluid, helium dynamicsHydrogen Storage and Materials

稀土元素Ce对铸态Cu-Si-Ni合金组织与性能的影响

袁孚胜、钟海燕、金平 等 4 位作者2010-01-01铝加工

研究了稀土元素Ce的不同加入量对铸态Cu—Si—Ni合金电导率、硬度和组织的影响。研究结果表明：稀土元素Ce能净化铜基体、细化晶粒、提高cu—si—Ni合金的电导率及硬度，当稀土元素Ce的加入量为0．06％时Cu—Si—Ni合金的电导率和硬度最高。

Advanced Memory and Neural ComputingMetallurgical and Alloy ProcessesSemiconductor materials and interfaces

On the correlation of morphology and growth parameters in ZnO nanowires

Abdollah Mortezaali、Z. Amini、Zahra Sadat Hosseini2010-01-01OpenAlex

The growth of ZnO nanowires as a function of the thickness of Au thin layers, deposition temprature and surface properties through simple carbothermal evaporation method is studied. Investigations by X-ray diffraction (XRD) revealed the (002) plane as the preferred plane for the growth of ZnO nanowires. Our experiment…

nanoparticles nucleation surface interactionsZnO doping and properties

C/C-SiC机织复合材料尺度参数对力学性能的影响

汪海滨、张卫红、许英杰2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

针对C/C-SiC纤维机织复合材料的特点,建立了C/C-SiC微结构有限元模型,并结合能量法研究了不同微结构关联参数对C/C-SiC机织复合材料宏观力学性能的影响。研究结果表明：本文中提出的C/C-SiC微结构有限元模型能够有效地反映C/C-SiC复合材料尺度关联参数对C/C-SiC力学性能的影响,纤维丝尺度的各个参数主要与C/C-SiC纤维束的力学性能相关联;纤维束尺度的各个参数主要与C/C-SiC宏观构件的整体性能相关联。

Advanced ceramic materials synthesisAdvanced materials and compositesInterconnection Networks and Systems

Термический нагрев тонкопленочных нанокомпозитов металл-диэлектрик в водородной плазме

И. М. Трегубов、О. В. Стогней、В. И. Пригожин 等 4 位作者2010-01-01Вестник Воронежского государственного технического университета

The influence of hydrogen plasma on the thermal heat of the thin-film metal-insulator nanocomposites has been investigated. It has been founded that the hydrogen plasma heats the nanocomposites up to a temperature of 350 400 0C independently of the composites electric resistance and chemical composition

Advanced Theoretical and Applied Studies in Material Sciences and GeometryMaterial Science and ThermodynamicsMaterial Properties and Applications

Electrospinning a small diameter tubular scaffold for tissue engineering blood vessels

Kam, Ee Fai2010-01-01DR-NTU (Nanyang Technological University)

Biodegradable scaffolds for tissue engineering have been around for some years. However, none has been successful in engineering viable autologous blood vessels which have inner diameter less than 5mm and wall thickness of 100m. In this report, a tubular scaffold was fabricated using the electrospinning technique wit…

Hydrogels: synthesis, properties, applicationsTissue Engineering and Regenerative MedicineElectrospun Nanofibers in Biomedical Applications

Studies on biosynthesis of gold nanoparticles By fusarium oxysporum

K. Deepa、T. Panda2010-01-01OpenAlex

Gold nanoparticles find applications in medicine, catalysis, electronics, and optics owing to their unique properties. Synthesis of gold nanoparticles by Fusarium oxysporum was studied as one of the efficient and ecofriendly alternatives. The extracellular fungal extract was analyzed for its bioreduction potential. Th…

Nanotechnology research and applicationsNanoparticles: synthesis and applications

BN/TiB_2纳米-微米复合粉末的制备及表征

龚雪、王为民、傅正义 等 6 位作者2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

利用化学溶液法,于酒精、水混合溶液中溶解分散H3BO3和CO（NH2）2,再加入TiB2,干燥后热处理合成了BN/TiB2纳米-微米复合粉末。通过差热-热重分析、X射线衍射和红外光谱分析,对合成产物进行了表征。结果表明：BN合成反应在700～1100℃之间完成,BN/TiB2复合粉末经1500℃热处理时,非晶态BN向h-BN转化。利用扫描电镜、透射电镜分析了粉体复合前后的形貌及显微结构特征,结果表明：BN包覆在TiB2颗粒表面获得了具有纳米-微米复合结构的BN/TiB2粉末。

Advanced ceramic materials synthesisFiber-reinforced polymer compositesBoron and Carbon Nanomaterials Research

化学溶液法制备Pb（Zr0.52Ti0.48）O3-CoFe2O4复合薄膜及其电极

陈源清、赵高扬、夏卫民2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

以硝酸镧和醋酸镍为原料,利用化学溶液法在硅基底上制备了具有良好导电性的LaNiO3（LNO）薄膜。以醋酸铅、硝酸氧锆、钛酸丁酯、硝酸铁、醋酸钴为原料,合成了Pb（Zr0.52Ti0.48）O3-CoFe2O4（PZT-CFO）溶液,并在LNO/Si薄膜上制备了PZT-CFO复合薄膜。通过X射线衍射、扫描电镜和电-磁测试研究了PZT-CFO复合薄膜的相结构、表面形貌、铁磁和铁电性能。结果表明：钙钛矿结构的PZT相和尖晶石结构的CFO相以纳米晶形式共存于PZT-CFO复合薄膜中,无其他杂相产生。750℃煅烧1h的PZT-CFO复合薄膜的剩余极化强度达6μC/cm^2,剩余磁化强度可达20kA/m,表现出良好的铁磁、铁电双重特性。

ZnO doping and propertiesMagnetic and transport properties of perovskites and related materialsMultiferroics and related materials

固体超强酸催化剂S2O8^2／Fe2O3-Al2O3的制备及其酯化性能

占华端、陈晓晖、魏可镁2010-01-01工业催化

以硝酸铁为铁源、硝酸铝为铝源，通过共沉淀法制备固体超强酸催化剂S2O8^2／Fe2O3-Al2O3通过催化剂样品的FT—IR谱图、不同焙烧温度催化剂样品的XRD谱图、不同陈化温度的N2吸附一脱附曲线以及催化剂样品的SEM照片，研究了其晶体的形成过程。催化剂样品红外谱图表明，催化剂中的S=O有较强的共价双键特征，诱导催化剂形成超强酸性；在XRD谱图中既无Al2O3的晶相峰，也无Fe2（SO4）3晶相峰，说明Al2O3与Fe2O3在催化剂样品的表面形成了S2O8^2／Fe2O3-Al2O3共价键的复杂结构。采用BET方程和BJH模型计算催化剂样品的比表面积和孔径分布，经冰水陈化的催化剂样品平均孔径为9．1nm，最可几孔径为7．5nm，…

Petroleum Processing and AnalysisThermal and Kinetic Analysis