Probability Distributions.- Linear Models for Regression.- Linear Models for Classification.- Neural Networks.- Kernel Methods.- Sparse Kernel Machines.- Graphical Models.- Mixture Models and EM.- Approximate Inference.- Sampling Methods.- Continuous Latent Variables.- Sequential Data.- Combining Models.

Pattern Recognition and Machine Learning

Provided is an organic electroluminescence device having high luminous efficiency, high heat resistance and an extremely long lifetime. The organic electroluminescence device of the present invention includes an organic thin film layer composed of one or more layers containing at least a light emitting layer is interposed between a cathode and an anode. The light emitting layer includes a compound containing a condensed ring and a luminescent metal complex capable of emitting light having a red-based color. It is preferable that the compound containing a condensed ring includes a host material, while the luminescent metal complex capable of emitting light having a red-based color includes a phosphorescent dopant.

Organic Electroluminescent Device

The solutions of Maxwell and Rayleigh were the first of many attempts to determine the eective thermal conductivity of heterogeneous material. Early models assumed that no thermal resistance exists between the phases in heterogeneous material. Later studies on solid-liquid and solid-solid boundaries revealed that a temperature drop occurs when heat flows through a boundary between two phases and, as a consequence, the interfacial thermal resistance should be included in the heat transfer model. This paper is a review of the most popular expressions for predicting the eective thermal conductivity of composite materials using the properties and volume fractions of constituent phases. Subject to review were empirical, analytical and numerical models, among others.

https://papers.itc.pw.edu.pl/index.php/JPT/article/download/463/637

A review of models for effective thermal conductivity of composite materials

Transition metal oxides – Thermoelectric properties

There have been concerted world wide efforts to develop steels suitable for use in efficient fossil fired power plants. Ferritic alloys containing between 9 and 12 wt-% chromium are seen as the most promising materials in this respect, especially for thick walled components such as headers and the main steam pipe in boilers. However, the performance of the improved steels has often not been realised in service, because premature failures occur in the heat affected zone of welded joints in a phenomenon referred to as type IV cracking. This review assesses the relationship between the composition and microstructure of 9–12 Cr steels, the welding and fabrication procedures and how these factors translate into a propensity for type IV failures.

Type IV cracking in ferritic power plant steels

Creep damage evaluation of 9Cr–1Mo–V–Nb steel welded joints showing Type IV fracture

An inorganic materials database system, AtomWork, has been developed and released on the Internet. It includes the phase diagram, crystal structure, X-ray powder diffraction, and property data of more than 80,000 inorganic materials extracted from scientific literature. The feature of this database is that the information of the synthesis, identification, and property of materials is organically linked, which enables the data reported in different papers to be grouped and compared at four different levels: chemical system, compound, substance, and material. The database can provide users with a comprehensive overview of substances and necessary information to understand the relationships among chemical component, structure, and property.

/pdf/inorganic-materials-database-for-exploring-the-nature-of-5a4odsfsb2.pdf

Inorganic Materials Database for Exploring the Nature of Material

The thermal resistances of 1250 kinds of interface were computed at room temperature based on the phonon diffuse mismatch model. The result shows that the ratio of Debye temperature and the ratio of average sound velocity can be approximately used to characterize the difference of two materials in terms of interfacial thermal resistance. The high interfacial thermal resistances are composed of high and low Debye temperature materials. The low interfacial thermal resistances are composed of both similar Debye temperature materials, and their Debye temperatures are very high. The relation between the interfacial thermal resistance with the ratio of average sound velocity is similar to that of the ratio of Debye temperature. [doi:10.2320/matertrans.MAW200717]

/pdf/computation-of-interfacial-thermal-resistance-by-phonon-11zkyjby4r.pdf

Computation of Interfacial Thermal Resistance by Phonon Diffuse Mismatch Model

Interfacial thermal resistance is an important factor that has a considerable elect on the thermal conductivity of composites, especially nanocomposites, and must therefore be considered when developing new composites for various structural and nonstructural applications. However, reported data on interfacial thermal resistance are sparse as a result of a lack of efficient measurement methods. We developed a new analytical and measurement method for the determination of the interfacial thermal resistance between a metal and a dielectric material by using a technique involving periodic Joule (ohmic) heating and thermo-reflectance. The principle is based on a one-dimensional model of heat conduction in a two-layered system, taking into account the interfacial thermal resistance. By using this method, the interfacial thermal resistances between Au films and substrates of SiO 2 glass or sapphire single crystal were measured. The results were compared with values calculated by the diffusion mismatch model, and the experimental factors that might affect the interfacial thermal resistance are discussed.

Measurement of Interfacial Thermal Resistance by Periodic Heating and a Thermo-Reflectance Technique

The out-of-plane thermal conductivity of sputtered tungsten oxide thin films with thickness of 100 to 300 nm was measured by two omega method based on a new analytical model with consideration of the interfacial thermal resistance between the films and the substrate The influence of the tungsten oxide structure on the thermal conductivity was studied The result reveals that the tungsten oxide thin films made with 10% reactive gas of oxygen had a mixed phase of WO2 and WO3, while those made with 100% oxygen were WO3 only The thermal conductivity of WO3 thin films is 163 Wm � 1 K � 1 , and that of WO2/WO3 films is 128 Wm � 1 K � 1  The difference is explained by a higher thermal resistance at the interface of WO2 and WO3 crystals caused by the mismatch of phonon state [doi:102320/matertrans471894]

Masayoshi Yamazaki

Papers

Creep damage evaluation of 9Cr–1Mo–V–Nb steel welded joints showing Type IV fracture

Inorganic Materials Database for Exploring the Nature of Material

Computation of Interfacial Thermal Resistance by Phonon Diffuse Mismatch Model

Measurement of Interfacial Thermal Resistance by Periodic Heating and a Thermo-Reflectance Technique

Thermal Conductivity Measurement of Tungsten Oxide Nanoscale Thin Films