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Development of New Materials Using Biomass Resources Derived the Banboo During Superheated Steam
No full text九州工業大学博士学位論文 学位記番号:生工博甲第259号 学位授与年月日:平成28年3月25日第1章 緒言||第2章 過熱水蒸気処理された竹の粉砕分級特性||第3章 竹/プラスチックコンポジットの機械的物性の評価とその向上||第4章 竹/リサイクルプラスチックコンポジットの機械的物性の評価とその向上||第5章 過熱水蒸気処理に伴う竹酢液の特性評価||第6章 竹酢液における発がん性物質:ベンゾ[a]ピレンの有無の確認||第7章 総
自己組織化マップ(SOM)とマルコフモデルに基づいた行動と感情の選択システムの開発
Get PDF九州工業大学博士学位論文 学位記番号:情工博甲第312号 学位授与年月日:平成28年3月25日1 Introduction||2 Fundamental Theories for Conbe-I robot System||3 System Structure of Conbe-I robot||4 Behavioral-Emotional Selection System||5 Conclusion
Evaluation of Adhesive Strength Based on the Intensity of Singular Stress Field of Single Lap Joint
Get PDFProceedings of 5th International Conference on Fracture Fatigue and Wear, FFW 2016, 24-26 August 2016, Kitakyushu, JapanIn this study, the adhesive strength for single lap joint is investigated based on the intensity of singular stress field. First, the critical intensity of singular stress at the adhesive dissimilar joint is calculated by using finite element method (FEM) based on the experimental result. It is found that the adhesive strength can be expressed as the critical intensity of singular stress field. Then, a suitable evaluation method of adhesive strength is investigated focusing on the intensity of singular stress field. The effect of specimen geometry on the intensity of singular stress is considered. The results show that the intensity of singular stress field decreases with increasing the adherend thickness, the minimum intensity of singular stress can be obtained when the adherend thickness is large enough. The results of the deformation angle at the interface corner edge show a similar trend as in intensity of singular stress field, and the minimum deformation angle can be obtained when the adherend thickness is large enough. The usefulness of the method is investigated focusing on the deformation angle at the interface corner edge
Optimal Double Sided Gate Control of IGBT for Lower Turn-off Loss and Surge Voltage Suppression
Get PDFCIPS 2016 International Conference on Integrated Power Electronics Systems, Mar 8-10, 2016, Nuremberg, GermanyThe current density of power semiconductor devices continues to increase and, carrier injection has been enhanced by several methods even though turn-off loss tends to be increased. In order to address this problem, we propose a double sided gate IGBT and optimal gate control method for lower turn-off loss. TCAD simulation numerically shows that the proposed IGBT successfully decreases turn-off loss. Furthermore, the turn-off loss is further decreased with optimal control of the double sided gate without surge voltage increase. In addition, we consider the effects of stray inductance on the performance of double sided gate IGBT
Coming out Mechanism of Steel Shaft from Ceramic Sleeve
No full textCeramic rollers can be used in the heating furnace conveniently because of its high temperature resistance. The new roller consists of ceramic sleeve and steel shaft connected only under a small shrink fitting ratio because of the brittleness. In the previous study, simulation of coming out of the shaft from the sleeve was performed, but only small number of loading cycle can be considered because of large computational time. To analyze the coming out problem more efficiently, in this paper, the two-dimensional shrink fitted structures are considered. Then, the effects of the magnitude of load and shrink fitting ratio are investigated under large number of loading cycle. Finally, the coming out mechanism is discussed for larger number of cycles by focusing on the shear stress and displacement at the joint end. The coming out occurs when the negative shear stress is unstable. On the other hand, the coming out does not occur when the positive shear stress is stable with little fluctuation
遺伝子変異株の代謝流束を推定するためのデータベース構築と Genetic Modification Fluxソフトウェアの開発
Get PDF1: INTRODUCTION AND BACKGROUND||2: MATERIALS AND METHODS||3: RESULT AND DISCUSSION||4: CONCLUSIONIn understanding the complexity of a metabolic network structure, flux distribution is the key information to observe as it holds direct representation of cellular phenotype. To examine this, the study on genetically perturbed conditions (e.g. gene deletion/knockout) is one of the useful methods, which significantly contributes to metabolic engineering and biotechnology applications. Currently, metabolic flux analysis (MFA) is proven to be suitable mechanism for specific gene knockout studies, yet the method involves exhaustive computational effort since the calculation are derived by a stoichiometric model of major intracellular reactions and applying mass balances to the intracellular metabolites.
Metabolic Flux Analysis (MFA) is widely used to investigate the metabolic fluxes of a variety of cells. MFA is based on the stoichiometric matrix of metabolic reactions and their thermodynamic constraints. The matrix is derived from a metabolic network map, where the rows and columns represent metabolites, chemical/transport reactions, respectively. MFA is very effective in understanding the mechanism of how metabolic networks generate a variety of cellular functions and in rationally planning a gene deletion/amplification strategy for strain improvements.
Flux Balance Analysis (FBA) is used to predict the steady-state flux distribution of genetically modified cells under different culture conditions. Minimization of Metabolic Adjustment (MOMA) was developed to predict the flux distributions of gene deletion mutants. FBA and MOMA often lead to incorrect predictions in situations where the constraints associated with regulation of gene expression or activity of the gene products are dominant, because they apply the Boolean logics or its related simple logics to gene regulations and enzyme activities. On the other hand, network-based pathway analyses, elementary modes (EMs) and extreme pathways emerge as alternative ways for constructing a mathematical model of metabolic networks with gene regulations. EM analysis was suggested to be convenient for integrating an enzyme activity profile into the flux distribution. Enzyme Control Fluxes (ECFs) uses the relative enzyme activity profile of a mutant to wild type to predict its flux distribution.
In facilitating the analysis of metabolic flux distributions, the support of computational approaches is significantly essential. In addition, the availability of real sample data particularly for further observation, a large number of knockout mutant data provides assistance in enhancing the process.
We had presented Genetic Modification Flux (GMF) that predicts the flux distribution of a broad range of genetically modified mutants. The feasibility of GMF to predict the flux distribution of genetic modification mutants is validated on various metabolic network models. The prediction using GMF shows higher prediction accuracy as compared to FBA and MOMA. To enhance the feasibility and usability of GMF, we developed two versions of simulator application with metabolic network database to predict flux distribution of genetically modified mutants. 112 data sets of Escherichia coli (E.coli), Corynebacterium glutamicum (C.glutamicum), Saccharomyces cerevisiae (S.cerevisiae), and Chinese Hamster Ovary (CHO) were registered as standard models
Numbers on Diameter in n-generalized Metric Spaces
Get PDFWe study some numbers on diameter in n-generalized metric spaces
微小螺距差對螺栓螺母聯接件的疲勞壽命的影響
No full textThe bolt-nut connections are widely used in various fields. In this paper, a slight pitch difference is introduced between the bolt and nut in order to study the effect on the fatigue performance. Here, we consider that the nut pitch is a few microns larger than the bolt pitch. Fatigue experiments are conducted for three kinds of specimens with different levels of pitch differences. The obtained S-N curves show that the fatigue life is extended to about 1.5 times by introducing a suitable pitch difference. According to the detailed investigation on the fractured specimens, it is found that the fractured positions and the crack configuration are totally different depending on the pitch difference. The mechanism of the fatigue strength improvement is discussed in terms of the stress amplitude and average stress at each bolt thread
