珠江デルタ地帯における西洋近代法と伝統的宗法規範の対立と同化に関する研究

研究代表者：井上貴也研究分担者：深川裕佳研究分担者：李　芝妍研究分担者：後藤武秀研究分担者：朱　大

Redistribution of iron during directional solidification of metallurgical-grade silicon at low growth rate

研究冶金级硅低速定向凝固过程中杂质铁的再分布。采用ICP-MS检测铁的浓度,绘制铁在固相、液相、晶界和晶体生长方向上的浓度示意图。铁浓度在固、液相中具有明显差异。依据质量守恒定理,计算得出溶质边界层约为4 mm,铁的有效分凝系数约为2.98×10~(-4)。在低速凝固条件下,铁容易偏析聚集在晶界。在生长方向上,由于低速凝固,铁浓度在硅锭86%高度以下几乎恒定,不完全符合Scheil方程规律。讨论了对流对铁再分布的影响,对流"死区"对铁再分布具有重要影响。Redistribution of iron during directional solidification of metallurgical-grade silicon(MG-Si) was conducted at low growth rate. Concentrations of iron were examined by ICP-MS and figured in solid and liquid phases, at grain boundary and in growth direction. Concentrations are significantly different between solid and liquid phases. The thickness of the solute boundary layer is about 4 mm verified by mass balance law, and the effective distribution coefficient is 2.98×10~(-4). Iron element easily segregates at grain boundary at low growth rate. In growth direction, concentrations are almost constant until 86% ingot height, and they do not meet the Scheil equation completely, which is caused by the low growth rate. The effect of convection on the redistribution of iron was discussed in detail. Especially, the "dead zone" of convection plays an important role in the iron redistribution.Projects(51334004,51204143)supported by the National Natural Science Foundation of China;; Project(2006L2003)supported by the Scientific Technological Innovation Platform of Fujian Province,Chin

RBFD: a Robust Image Local Binary Feature Descriptor

针对传统浮点型特征描述子占用空间大、匹配速度慢的问题,提出一种基于梯度统计信息比较的局部二值特征描述子.通过对比特征点邻域梯度统计信息生成二值特征描述子,再利用多邻域和多分块策略提高描述子判别力,最后通过近似简化的AdA bOOST算法实现描述子降维.实验结果表明,与已有描述子相比,文中提出的描述子在实现快速生成的同时其鲁棒性更强.The traditional floating feature descriptors are in high memory load and slow in matching.To best address these problems, this paper proposed a novel binary feature descriptor based on gradient statistic information comparison.Firstly, the image patch around the keypoint is divided into sub-regions, and our binary descriptor is constructed by comparing the gradient statistic information of these sub-regions.Then, a multi-gridding and multi-support region strategy is applied to boost the discrimination of our descriptor.Finally, a simplified Ada Boost algorithm is applied to realize the descriptor dimension reduction.The experimental results show that our descriptor is both efficient in construction and robust to compare with the state-of-the-art methods.国家自然科学基金(61373076;61202143); 厦门大学中央高校项目(2013121026;2011121052); 厦门大学985平台建设费项目; 高等学校博士学科点专项科研基金(201101211120024); 福建省自然科学基金(2013J05100;2010J01345;2011J01367); 湖南省自然科学基金(12JJ2040); 湖南省教育厅科研项目(09A046); 厦门市科技重点项目(3502Z20123017); 深圳市战略性新兴产业发展专项基金(JCY

Study on Solid-State Circular Dichroism Spectroscopy and Its Application to Chiral M(II) Schiff Base Complexes

结合课题组近期的相关研究,对固体CD光谱在手性配合物研究中的应用,特别是手性样品固体CD光谱的测试方法进行了概述,通过对四对手性席夫碱M(II)(M=Ni、Cu)配合物的固体和溶液CD光谱进行比较研究,发现配合物的手性构型在固液相中保持一致,但其固液CD光谱之间存在不同程度的差异,可能是由于相应配合物在固体和溶液相中的四面体扭曲或构象的微妙不同所致.An account on the application of solid-state CD on chiral metal complexes is briefly reviewed. Special focus is on the methods to record solid-state CD spectra of chiral solid sample, and then we switch to the comparison between solid-state and solution CD spectra of four pairs of chiral M(II) (M = Ni, Cu) Schiff base complexes. The solid-state CD spectra reveal that the chiral complexes mantain the same handeness found in solution states. But it is notable that there are some differences between the solid-state and solution CD spectra for the selective chiral complexes, which may be ascribed to some subtle tetrahedral distortion or conformational distinctions of the complexes between the two states.国家自然科学基金(20171037);; 南京大学配位化学国家重点实验室基金;; 厦门大学科技创新项目(B类,2003XDYY39)资

Study on solid-state circular dichroism spectroscopy and its application to chiral M(II) Schiff base complexes

An account on the application of solid-state CD on chiral metal complexes is briefly reviewed. Special focus is on the methods to record solid-state CD spectra of chiral solid sample, and then we switch to the comparison between solid-state and solution CD spectra of four pairs of chiral M(II) (M = Ni, Cu) Schiff base complexes. The solid-state CD spectra reveal that the chiral complexes maintain the same handeness found in solution states. But it is notable that there are some differences between the solid-state and solution CD spectra for the selective chiral complexes, which may be ascribed to some subtle tetrahedral distortion or conformational distinctions of the complexes between the two states

<記事>機械精製研究分野 (1999.1-1999.12) (研究活動報告)

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