Study on Synergistic Catalysis with Octahedral Chiral-at-Rhodium Complexes

协同催化是近年来快速发展起来的一种新型、高效的合成策略，通常以两种 或两种以上的催化剂共同作用，分别对不同的反应底物进行活化，充分降低反应 能垒，实现有机合成中的一些困难问题。特别是在不对称催化中，不同手性催化 剂的结合，有利于实现对多手性中心的立体化学控制，在不对称合成中具有重要 的应用。然而，目前协同催化仍然存在着一些亟待解决的问题，如由于不同催化 剂间相容性造成的催化剂、反应原理、条件选择的局限性及适用的催化反应类型、 底物通常较有限等。因此，发展具有稳定结构和构型、且具有特殊底物活化或手 性传递方式从而与其它类型催化剂具有更高相容性的催化剂，构建新型高效协同 催化体系，...Synergistic catalysis is a highly efficient synthesis strategy and has achieved rapid development in recent years. Under combination of two or more catalysts, the concomitant activation of more than one reaction partner, such as electrophile and nucleophile, lowers the energetic barrier and allows access to many difficult or unattainable transformations. In particular, coorperation of differen...学位：理学硕士院系专业：化学化工学院_化学生物学学号：2052013115167

The study on the heat conduction of Doped Graphene

纯净的石墨烯具有很高的热传导系数。它作为高效传热介质在大规模集成电路芯片中具有广阔的应用前景。目前，化学沉积法制备石墨烯可实现大规模生产，但制备过程不可避免会引入同位素杂质13C，这会改变石墨稀的热输运性质。本文利用分子动力学模拟研究了含有13C的扶手型石墨烯的声子热传导行为，探索导致热传导系数下降的微观机制。主要内容包括以下两个工作：其一，计算了具有不同13C浓度的扶手型石墨烯的热传导系数，并通过局域动能激发的传播过程，分析了杂质13C影响热传导行为的微观机制；其二，通过不同方向的局域动量激发的传播过程，进一步细致地研究了杂质13C对不同能量传输模式的影响。 本文具体分为以下五章：第一章对...Pure graphene has an extremely high thermal conductivity, which indicates that graphene is a broad promising material as efficient heat transfer medium used in large scale integrated circuit. At present, chemical vapor deposited is suitable for graphene industrialized production, but isotope 13C is probably mixed in graphene through this method, which changes the heat transport in graphene. In t...学位：理学硕士院系专业：物理与机电工程学院物理学系_凝聚态物理学号：1982009115253

对普通高校综合体育馆建设的必要性分析

普通高校建设综合体育馆可以保证普通高校体育教学、课余训练和竞赛以及群体活动的正常进行,满足教育部本科教学工作水平评估对体育场馆、设施的要求,促进高校体育产业的发展,其必要性是显而易见的

企业合并会计处理中的盈余管理研究

为了规范企业合并会计信息的披露,本文主要从合并会计处理的方法选择、合并范围与合并日期的确认等方面探讨了合并会计处理中盈余管理的手段

中国淡水微囊藻属常见种类的分类学讨论——以滇池为例

根据中国云南滇池藻类样品的观察结果,对中国分布的淡水微囊藻属Microcystis10个常见种的形态特征进行了描述,同时对它们的分类学进行了讨论,并整理出分类检索表。这10种微囊藻是铜绿微囊藻M.aeruginosa、放射微囊藻M.botrys、坚实微囊藻M.firma、水华微囊藻M.flos-aquae、鱼害微囊藻M.ichthyoblabe、挪氏微囊藻M.novacekii、假丝微囊藻M.pseudofilamentosa、史密斯微囊藻M.smithii、绿色微囊藻M.viridis、惠氏微囊藻M.

Correlation between use of social software and high risk behaviors of HIV infection among MSM in Beijing

目的了解北京市男男性行为者（MSM）社交软件的使用与人类免疫缺陷病毒（HIV）感染及其影响因素的相关性,为今后干预工作提供依据。方法 2016年3—5月,由社区小组招募MSM进行问卷调查,同时进行HIV抗体检测。结果共招募215名MSM,回收有效问卷214份。214人的平均年龄为30.8岁;学历在大专及以上者占73.4%;同性恋者占72.4%;84.6%的人主要通过社交软件寻找性伴。214人中确证HIV感染5人,阳性率为2.3%。分析显示,是否使用社交软件、是否使用同性社交软件和是否使用普通人群社交软件均与HIV感染不相关。多因素分析结果显示,受教育程度高、性取向为同性恋的人更多地使用同性社交软件。63.1%被调查者自述曾经在社交软件上了解到艾滋病防治相关知识,但自述了解程度与是否通过社交软件获得相关信息不相关。结论 MSM社交软件的使用与HIV感染情况无关,也没有增加其对艾滋病知识的了解。但可以考虑改进同性社交软件功能,增加艾滋病防治知识内容,对MSM尤其是高学历、自我定位为同性恋的MSM进行艾滋病防治宣传。[Objective] To understand the correlation between the use of social software and human immunodeficiency virus（HIV）infection and its influencing factors among men who have sex with men（MSM）in Beijing,provide the basis for future intervention work.[Methods]From May to March in 2016,MSM was recruited by community groups to carry out a questionnaire survey and HIV antibody of them was detected.[Results]A total of 215 MSM were recruited and 214 valid questionnaires were recovered. The average age of the 214 MSM was 30.8 years old,73.4% had the education level in college and above,the homosexuals accounted for 72.4%,and84.6% of the respondents mainly found sexual partners through the social software. There were 5 cases of confirmed HIV infection among 214 MSM with the positive rate of 2.3%. The analysis revealed that whether the respondents use the social software,the homosexual social software and the general social software were not related to HIV infection. The results of multivariate analysis showed that people with higher educational level and homosexual orientation were more likely to use the homosexual social software. 63.1% of respondents reported that they had been obtained the knowledge of AIDS prevention and control from social software,but the understanding level was not related to whether the relevant information was obtained through social software or not.[Conclusion]The use of social software has no correlation with HIV infection among MSM,and does not increase their knowledge level of AIDS prevention and control. However,it is necessary to improve the function of the homosexual social software and increase the content of AIDS prevention and control knowledge to carry out the AIDS education among MSM,especially those with higher educational level and homosexual orientation

The Optical Design and Simulation of Modular LED Freeform Reflector Dipped Headlight

本文从汽车用前照灯国标gb25991—2010出发,在已知光源属性的前提下,利用rEfCAd设计了适用于高亮度白光lEd的自由曲面反射器,将多套反射系统组合成汽车前照灯,并通过TrACEPrO仿真模拟,分析各测试点、区域的照度值,其设计结果能较好地符合国标对近光的要求。该方法能更充分发挥lEd的优点,提高了光能利用率,且大大优化和节省了设计空间。In this paper,a kind of car Head lamp integrating freeform reflectors for bright white LED is presented.Complying with the National Standard GB25991—2010 and considering light source properties known,at first,the freeform reflector is designed with RefCAD,and then several reflector models are integrated into a car head lamp model.The illumination values of the test points and regions are simulated with Tracepro.The simulation results show that it meets the requirement of low beam-GB.This design takes the advantage of LED,increases the utilization of optical energy,and greatly optimizes and saves the design space.福建省重大科技项目资助(2006H0092

Light Distribution Design of Automobile Freeform Headlamp Reflector

随着现代汽车车灯设计的发展,传统的车灯配光镜由于其设计繁琐,光能利用率较低,且影响汽车美观等缺点,现已逐渐被自由曲面的车灯产品所替代。从汽车前照近光灯国标gb4599-2007出发,在已知光源属性的前提下,利用rEfCAd和lIgHTTOOlS设计了一款适用于H7卤素灯的自由曲面反射器,经过对各测试点、区域的照度值的分析,较好地符合了gb4599-2007对近光的要求。该方法能够大大缩短车灯设计周期,为未来大功率lEd用于车灯设计提供参考。With the development of the modern automotive headlight,the traditional lens headlamp is now gradually being eliminated,because the design is complicated,inefficiency and the impact of the automotive ap pearance.The freeform reflector becomes the predominant designation.Based on the GB4599-2007 regulation,on this premise of getting the light source properties,a freeform reflector for H7 halogen is designed using RefCAD and LightTools.After analysis of the illumination values for each test point and region,the results show that the illu mination distributions meet requirements of GB4599-2007 regulation for dipped headlight.The method can greatly shorten the headlight design cycle and provide a reference for powerful LED used in headlamp design.福建省重大科技项目(2006H0092

Optimization of LED Array Mode

作为新一代照明光源lEd照明技术已经有了长足的发展,但单颗lEd并不能满足正常的照明需求,想达到所要的照明效果通常采用多个lEd组合。lEd组合有各种形式,利用TrACEPrO对4种lEd平面阵列形式,即:3x3方形阵列、3-6同心圆阵列、阿基米德螺线阵列以及1-8圆形阵列进行了详细的光学分析。在满足照明要求的条件下,通过对比找到一种最优化的设计,发现1-8圆形阵列效果最好,所占面积最小,从而可以减少材料的浪费,进一步提高lEd照明的性价比,为lEd照明的普及提供设计上的借鉴。The lighting technique of LED has experienced substantial progress.However,a single LED cannot meet the demand for the normal lighting.LED combination is usually adopted to achieve the desired lighting effects.The forms of LED combination are varied.A detailed optical analysis on four forms of LED planar array is taken by using Tracepro,which are 3×3 square array,3-6 concentric array,Archimedean spiral array and 1-8 circular array.By the comparison,which find that 1-8 circular array is the best optimal design to reduce the waste of material and further improve the cost performance of LED lighting under the conditions of meeting the lighting requirements.A ref erence can be provided for the popularity of LED lighting.福建省重大科技项目(2006H0092

Development, fabrication, and applications of biomedical electrodes

生物医用电极作为一种能够有效地将生物体电化学活动产生的离子电位转换成测量系统电子电位的传感器,广泛应用于现代临床检测和生物医学测量.近年来,由于生物医用电极在心电图ECg、脑电图EEg、肌电图EMg以及电阻抗成像EIT等领域的迫切应用需求,新型生物医用电极结构及其高效低成本的制造方法不断涌现,生物医用电极制造技术获得飞速发展.本文通过对现有的生物医用体表电极进行了分类(包括传统银/氯化银电极、微针电极、纺织柔性电极、柔性衬底电极、泡沫结构电极、绝缘干电极),分别对其制造工艺过程与使用方法进行了综述,并对其已有或潜在的应用领域进行详细分析,最后对生物医用电极的应用前景进行了展望.Biomedical electrodes convert the ion potential generated by electrochemical activities into an electronic potential that can be measured by instrumentation systems; they are widely used as sensors in modern clinical detection and biomedical measurement.In recent years, with increasing applications in the fields of electrocardiography(ECG), electroencephalography(EEG), electromyography(EMG), and electrical impedance tomography(EIT), a great number of new biomedical electrodes with novel structural design and new material selection have been explored and developed; low-cost fabrication methods are also being intensively studied.In this paper, biomedical electrodes are classified into five types, including traditional silver/silver chloride electrodes, microneedle electrodes, flexible textile electrodes, foam electrodes, and insulated dry electrodes.The conversion mechanisms from ion potential to electronic potential of different biomedical electrodes described in the prior literature are firstly introduced, and then the latest research results concerning the fabrication processes for different biomedical electrodes, and the methods of using them, are reviewed.The advantages and disadvantages of each type of electrode for practical applications are discussed, based on the published literature.A general description of the current applications of biomedical electrodes in ECG, EEG, EMG, and EIT is presented.Typical results from researchers in various countries are reviewed to further introduce the detailed application of different biomedical electrodes.Emerging application fields for biomedical electrodes, such as electrooculography, electrogastrography, and the study of the nervous system, are also presented.Finally, the development and application prospects of biomedical electrodes are described briefly.With the rapid development of microelectronics, micro-nano manufacturing and signal processing technology, the related manufacturing technologies and signal processing methods for biomedical electrodes have achieved great progress; in particular, a much deeper understanding about the contact mechanism with human tissue and skin has been obtained.We believe that many new biomedical electrodes will be developed in the next few years to greatly improve the detection level of bioelectric information.国家自然科学基金(51475397); 厦门大学中央高校基本科研业务费(2013121017)资