从三角范畴的recollement到Abel范畴的recollement

研究了三角范畴的rECOllEMEnT与AbEl范畴的rECOllEMEnT的关系.证明了:若三角范畴d允许关于三角范畴d和d的rECOllEMEnT,则AbEl范畴d/T允许关于AbEl范畴d/I*(T)和d/J*(T)的rECOllEMEnT,其中T为d的CluSTEr-倾斜子范畴,且满足I*I*(T)*T,J*J*(T)*T.国家自然科学基金(批准号:10671161);教育部博士点基金(批准号:20060384002);华侨大学科研启动基金(批准号:08BS506)资助项

从三角范畴的recollement到Abel 范畴的 recollement

研究了三角范畴的recollement 与Abel 范畴的recollement 的关系. 证明了：若三角范畴D 允许关于三角范畴D0 和D00 的recollement, 则Abel 范畴D=T 允许关于Abel 范畴D0=i¤(T ) 和D00=j¤(T ) 的recollement, 其中T 为D 的cluster-倾斜子范畴, 且满足 i¤i¤(T ) ½ T ; j¤j¤(T ) ½ T .国家自然科学基金、 教育部博士点基金 华侨大学科研启动基

Euclidean 型路代数预投射倾斜模与完全切片模

证明了:设Euclidean 型路代数的倾斜模T 为预投射模(或预入射模) ,若其不可分解直和项在不同的τ2轨道 上,则T 为完全切片模.国家自然科学基金资助项

THE ANALYSIS OF CONTEMPORARY REGIONAL ARCHITECTURE ADAPTATION WITH SYSTEMATOLOGY

地域建筑适应性设计是对“地域建筑”命题的具体化,从“元素、关系、结构、系统”多层次分析是对建筑适应性设计的深刻解读.文章通过对地域建筑适应性的分层次分析,以系统论的视角从“元素、关系、结构、系统”层次对地域建筑适应性创作进行解析,阐述当代建筑创作中对地域性的关照,以倡导地域建筑创作应该适应环境、尊重文化,美观与经济合理

Looking For Criticism Of China's Construction Methods

建筑理论、建筑历史、建筑批评三位一体,是建筑设计最为重要的一部分,三个因素是不可分割的。但是目前中国的建筑批评学发展是处于弱势的地位,并且影响到了建筑的发展。本文通过对本土建筑批评体系的研究,指出其中不足,进而总结出建立本土化建筑批评的方法。Architectural theory, architectural history, architecture critics of the Trinity is the most important part of the architectural design. The three parts are inseparable. But China's current development status of construction Criticism disadvantaged. The reason is because the Chinese architectural theory foundation is weak, and the lack of architectural language. Chinese architectural criticism if not in theory be developed, will lead to the growing problem of architectural design. Therefore, when looking for criticizing China's building a very pressing issue.厦门大学田野调查基金资助项目(2015GF022

Optimization for astaxanthin extraction from Haematococcus pluvialis with ethanol using response surface methodology

采用安全无毒的乙醇为溶剂,研究了超声时间、料液比、搅拌速度等因素对虾青素提取效率的影响。在此基础上,采用响应面设计对以上3个因素的交互关系进行探究。结果表明,3个因素对虾青素提取率的影响顺序为：超声时间〉料液比〉搅拌速度;最佳提取条件为：超声时间20min、料液比1：150、搅拌速度1000 r/min,在此条件下虾青素提取率可达48.42%。Ethanol, an environmentally friendly solvent, was used to extract astaxanthin from Haematococcus pluvialis. The effect of several conditions, including ultrasound time, the ratio of solid to liquid （S/L） and stirring rate, on astaxanthin extraction rate was investigated. Response surface methodology was applied to study the interaction in these factors. The effects of three factors on the extraction of astaxanthin were in order of ultrasound time, S/L, and stirring rate. The optimal astaxanthin extraction rate was 48.42% with 20 min of ultrasound time, 1：150 of S/L, and 1000 r/min of stirring rate.国家自然科学基金项目（41606177）; 福建省高校产学合作项目（2015N5006）; 福建省教育厅中青年教师教育科研项目（JA15406）; 泉州市科技局校地协同创新项目（2016N056

Advantages and Disadvantages of the University Entrance Exam Reform Integrating Arts and Science

不分文理高考不仅仅是高考文理科合并那么简单,它需要在科目改革的同时照顾到试题的改革,需要在不分文理的前提下照顾到不同学生的潜力倾向,需要以高考的改革来带动中小学教育的变革,因而是一项牵一发而动全身的社会系统工程。我们必须对改革中可能出现的诸多具体问题进行认真思考,并着力解决。Integrating arts and sciences in the university entrance exam is not just merging the arts and sciences.It needs to take the reform of the questions into count as well as the reform of the subjects. It also needs to consider the student's to different tendencies under the premise of integrating arts and sciences. It needs to drive changes in the primary and secondary education with the reform of university entrance examination. It is a social systems engineering. We need to carefully think about it and strive to resolve many of the specific problems in the reforming

A Novel Method for Preparation of Activated Alumina

[中文文摘]将结晶氯化铝与柠檬酸及淀粉等造孔剂混合,经直接干燥和焙烧制得了一种无定形活性氧化铝,并通过X射线粉末衍射、N2物理吸附及氨程序升温脱附等手段对活性氧化铝样品进行了表征,探讨了各组分对活性氧化铝样品性质所起的作用.与常规的活性氧化铝制备方法相比,这种制法省去了中和、老化、过滤和洗涤等步骤,缩短制备周期且过程容易控制.活性氧化铝具有适宜且可调节的比表面积和孔径分布,作为载体负载镍金属组分制成负载型催化剂后,对乙苯加氢饱和与加氢裂化表现出较高的催化活性.[英文文摘]A novel and simple method was developed to prepare alumina with suitable specific surface area and pore size distribution. First,AlCl3·6H2O and citric acid were heated without water in a water bath at 90 ℃ with stirring until a homogenous solution was obtained.Then starch was added into is solution.After the solution was dried at 110 ℃ and calcined at indicated temperature, activated alumina was obtained.The activated alumina was characterized by N2 adsorption,X-ray diffraction,and NH3 temperature-programmed desorption. Compared with the usual technology , this novel preparation did not include some steps such as aging , filtering , and washing. Moreover , the specific surface area and pore size distribution of the activated alumina could be controlled and modified by changing the preparation parameters. The supported Ni/ Al2O3 catalyst with the activated alumina as support showed higher activity for hydrogenation and hydrocracking of ethylbenzene.国家重点基础研究发展计划(973计,2004CB217805); 福建省“百千万人才工程”项目; 福建省自然科学基金(U0750016)

旋转活塞发动机内部工作过程的研究(下)

四、转子机的点火燃烧过程 4.1 概貌 转子机燃料经济性不好的又一原因是点火燃烧不良。就基本原理来说,转子机与一般的往复机无异。但由于燃烧室结构上的一些特点,有它独特的面貌: i) 间接点火过程 电火花先点燃

Reactor model with cross-flow for aromatics catalytic hydrogenation

[中文文摘]提出了一种抗硫中毒的芳烃加氢催化反应器模型,称之为交叉流反应器模型,把反应物料分为两股,其中含有噻吩的乙苯物料采用轴向连续流动方式由反应器进口进入催化剂床层,而氢气由铅直导管直接进入催化剂床层中,然后与乙苯物料混合。在氢气导管出口处形成含硫乙苯浓度低而氢气浓度高的特殊区域,因而硫对催化剂的中毒效应大幅度降低,整体上提高了乙苯加氢饱和反应效率。与传统轴向混合流反应器进行比较,在相同条件下交叉流反应器具有更好的整体加氢反应性能。分别建立了交叉流反应器与传统轴向混合流反应器模型,提出了两种反应器的催化反应转化率方程;利用此转化率方程,对实验数据进行处理,得到动力学参数,模型的计算结果与实验数据相吻合,也验证了在交叉流反应器中,硫的中毒效应明显减弱。[英文摘要]A novel reactor model named cross-flow reactor for aromatics catalytic hydrogenation was proposed.The reactants were divided into two flows:ethylbenzene with thiophene was introduced to the catalyst bed along the axial direction of the columnar reactor,while hydrogen was introduced into catalyst bed through a vertical pipe with openings.Because special areas with high H2 pressure and low H2S pressure were formed near these openings,the poisoning of catalyst by thiophene was substantially decreased,and consequently the reaction of et hylbenzene hydrogenation was improved as compared with the traditional reactor with mixed co-flow. Finally , kinetic models were established for this cross-flow reactor and the traditional reactor1And the conversion equations of these two reactors were given.By using these equations , the experiments data were fitted to obtain kinetics parameters. The calculation results agreed well with the experimental data. It was also demonst rated that sulfur poisoning in cross-flow reactor was weakened.国家重点基础研究发展计划项目(2004CB217805); 福建省“百千万人才工程”支持项目; 福建省自然科学基金项目(U0750016)