On structures of two classes of infinite dimensional Lie algebras

本文主要考虑两类无限维李代数的结构理论.首先我们确定了复数域上的秩为$2$的广义无中心Virasoro代数的导子代数.其次我们完全刻画了一个包含Witt代数作为其子代数的李代数$L$的自同构群.In this paper we mainly consider the structures of two classes of infinite dimensional Lie algebras. Firstly we determine the derivation algebra of the generalized centerless Virasoro algebra of rank $2$ over the field of complex number. Secondly we characterize completely the automorphism group of $L$ which contains the Witt algebra as its subalgebra.学位：理学硕士院系专业：数学科学学院_基础数学学号：1902011115254

全髋置换和多节段截骨治疗强直性脊柱炎驼背并髋骨性屈曲强直

【目的】评价多节段脊柱环绕截骨矫正术和髋关节置换术, 探讨两种手术各自的指征和优点。【方 法】328 例强直性脊柱炎驼背矫正和48 例强直性脊柱炎髋关节屈曲强直行手术的患者中, 同时有驼背伴随髋 关节骨性屈曲强直9 例, 先行髋关节置换,然后强直性脊柱炎驼背行经椎弓根一次性多节段脊柱环绕截骨矫 正术, 生物力学原理设计截骨术。随访5 年以上, 行髋关节置换效果按Harris 标准结合X 线片评价, 并对脊柱 受力进行生物力学分析。【结果】优5 例, 良2 例, 一般1 例, 差1 例。所有病人髋关节活动范围明显增大。多节 段椎弓椎体截骨驼背矫正术后, 矫正Cobb′s 角56°(40°~ 88°), 驼背矫正率78%。较好地恢复脊柱的生理曲线 和负重特点。术后无神经血管损伤, 感染和死亡等并发症。【结论】先行全髋关节置换手术, 再多节段椎弓椎体 截骨矫正驼背, 是强直性脊柱炎驼背并髋关节骨性屈曲强直的较佳手术方案

Probing nanoscale spatial distribution of plasmonically excited hot carriers

表面等离激元（SP）效应可产生远高于热平衡下费米能级能量的热电子-空穴对（热载流子），从而能够引发和促进相关的光电或者化学过程，为在纳米尺度上高效利用光能实现物质和能量转化提供了极为有效的手段，化学化工学院任斌教授课题组利用前期自主发展的电化学针尖增强拉曼光谱技术，通过调控电位开关SP热载流子催化的反应，实现了有效热载流子催化反应区域的纳米分辨成像，使反应区域在实空间的分布可视化。实验上获得了有效热载流子的输运距离，从而证明了能量越高的热载流子越需要在更短的输运距离范围内收集捕获。 该工作在任斌教授和王翔副教授的共同指导下完成。实验主要由化学化工学院已毕业博士生黄声超完成。理论计算主要由电子科学与技术学院的朱锦峰副教授和已毕业硕士生李察微完成。此外，化学化工学院已毕业硕士生赵庆庆、博后何玉韩和胡树等人也参与了部分研究与课题讨论。【Abstract】Surface plasmons (SPs) of metals enable the tight focusing and strong absorption of light to realize an efficient utilization of photons at nanoscale. In particular, the SP-generated hot carriers have emerged as a promising way to efficiently drive photochemical and photoelectric processes under moderate conditions. In situ measuring of the transport process and spatial distribution of hot carriers in real space is crucial to efficiently capture the hot carriers.Here, we use electrochemical tip-enhanced Raman spectroscopy (EC-TERS) to in situmonitor an SP-driven decarboxylation and resolve the spatial distribution of hot carriers with a nanometer spatial resolution. The transport distance of about 20 nm for the reactive hot carriers is obtained from the TERS imaging result. The hot carriers with a higher energy have a shorter transport distance. These conclusions can be guides for the design and arrangement of reactants and devices to efficiently make use of plasmonic hot carriers.The authors acknowledge the financial supports from MOST of China (2016YFA0200601), NSFC (21633005, 21790354, 21503181, 21711530704, U1830116), Natural Science Foundation of Fujian Province (2016J05046), China Postdoctoral Science Foundation (2017M622062) and the Fundamental Research Funds for the Central Universities (20720190010).本研究工作得到了国家自然科学基金委和科技部等的资助和支持

高粱子粒淀粉表面色素的树脂分离研究

对纯化高粱淀粉过程中所得到的淀粉共生天然色素进行了树脂分离纯化研究。得到了树脂分离高粱淀粉共生色素的吸附动力学结果,3 种大孔吸附树脂 HPD-600、AB-8、H103 对高粱红的吸附为慢速平衡型。通过对树脂分离所得色素成份的红外光谱、紫外光谱、质谱分析得出,高粱籽粒淀粉共生色素与高粱壳中的高粱红主要成份是同样的物质,鉴定出所分离的主要成份之一为 5,7,4′-三羟基黄酮

地统计学分析方法在水生态系统研究中的应用

简要介绍了地统计学分析方法的发展和在生态学中的应用情况，提出了将这种方法应用于水生态系统空间格局分析的可能性，然后用梅子垭水库水体藻类叶绿素a含量为例对其浓度场的水平2维空间格局进行了分析，并以此确定了叶绿素a在整个空间和不同方位上空间格局的变化情况

分形理论对水生态系统空间格局研究初探

首先对分形理论在生态学中的应用情况作了简要介绍，然后应用它对梅子垭水库的藻类叶绿素a浓度场水平2维空间格局进行了分析，通过对不同时间各浓度轮廓线的空间占据能力进行比较分析，确定了各浓度的稳定程度。可由此说明浮游植物的变化情况和生长潜力

梅子垭水库生态因子场的地统计学分析

应用地统计学方法，对梅子垭水库的典型理化因子的生态因子场的水平的２维空间格局进行了分析。通过空间相关性的分析，确定了生态因子场的整个空间和不同方位上的空间格局的变化情况

分形理论对水生态系统空间格局研究初探

首先对分形理论在生态学中的应用情况作了简要介绍，然后应用驼对梅子垭水库的藻类叶绿素ａ浓度场水平２维空间格局进行了分析，通过对不同时间各浓度轮廓线的空间占据能力进行比较分析，确定了各浓度的稳定程度。可由此说明浮游植物的变化情况和生长潜力

分形理论对水生态系统空间格局研究初探

首先对分形理论在生态学中的应用情况作了简要介绍，然后应用驼对梅子垭水库的藻类叶绿素ａ浓度场水平２维空间格局进行了分析，通过对不同时间各浓度轮廓线的空间占据能力进行比较分析，确定了各浓度的稳定程度。可由此说明浮游植物的变化情况和生长潜力

Production of poly(gamma-glutamic acid) : study and optimization of the process using agro-industrial residues

Orientador: Ranulfo Monte AlegreDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de AlimentosResumo: A utilização industrial de matérias-primas obtidas por fontes renováveis é essencial para o desenvolvimento sustentável da sociedade moderna. A necessidade de se utilizar de processos catalíticos "verdes", ecologicamente corretos para converter fontes renováveis em commodities químicos, dentre eles os biopolímeros está mobilizando pesquisadores do mundo inteiro. Dentre os diversos polímeros biossintetizados, encontra-se o gama-PGA, que é solúvel em água, aniônico, biodegradável e biocompatível, com amplas aplicações nas áreas química, médica, ambiental e de alimentos. Este trabalho buscou a otimização da obtenção do ácido gama-poliglutâmico (gama-PGA) por fermentação em estado sólido utilizando resíduo fibroso de soja como fonte de carbono. A espécie selecionada para este estudo foi Bacillus velezensis e Bacillus subtillis onde três linhagens foram testadas, selecionando-se a que apresentou melhor crescimento e produção de gama-PGA. Além disso, foram mensurados os fatores como: aeração e umidade do meio de fermentação. O estudo de otimização foi realizado utilizando a estratégia de planejamentos experimentais. O meio sólido que maximizou a produção foi fixado em 9:1 de sub-produto fibroso de soja e casca de arroz, possibilitando a máxima produção de 46,19 g de gama-PGA/ kg de meio sólido (b.s.), sem adição do precursor ácido glutâmico, sendo assim um meio viável para produção de gama-PGA com menor custo de processoAbstract: The industrial use of raw materials obtained from renewable sources is essential to the sustainable development of modern society. The need to use catalytic processes "green" ecologically correct to convert renewable commodity chemicals, including biopolymers is mobilizing researchers worldwide. Among the various polymers biosynthesized, is the gama-PGA, which is water-soluble, anionic, biodegradable and biocompatible, with wide applications in the chemical, medical, environmental, and food. This study aimed to optimize the obtaining the ?-polyglutamic acid (gama-PGA) by solid state fermentation using soy fibrous residue as a carbon source. The species selected for this study was Bacillus subtilis and Bacillus velezensis where three strains were tested, selecting the one that showed better growth and production of gama-PGA. In addition, we measured factors such as aeration and moisture from the fermentation medium. The optimization study was performed using the strategy of experimental design. The solid medium which maximized the yield was fixed at 9:1 fibrous byproduct of soybean and rice hulls, allowing for maximum yield of 46.19 g of gama-PGA / kg of solid medim (bs) without addition precursor glutamic acid, and thus a viable means for producing gama-PGA with lower process costMestradoEngenharia de AlimentosMestra em Engenharia de Alimento