Measurement and Evaluation of Optical Surface after Precision Grinding

随着光学技术的发展，各种精密光学元件被广泛地应用于工农业生产，国防军事建设，航空航天科技等。为保证元件的加工精度，检测技术已成为先进光学元件制造的关键。合理的检测方法对评价元件表面特性以及指导元件的精密加工有着很大的帮助。 本文根据精密磨削加工的要求，从宏观角度对光学元件的表面形状进行检测；从微观角度对元件的表面粗糙度、微形貌等表面质量进行检测；以及对元件的亚表面损伤进行检测，从而为加工提供指导思想，实现高精度、高效率、低缺陷的磨削加工。本文具体研究内容如下： 1.设计了一套光学元件面形精度的在位检测系统，包括硬件系统的搭建和软件系统的开发，并对检测轨迹进行了规划，分析了不同检测路径的优缺...With the development of optical design and manufacturing technology, more and more optical components have been widely used in industrial and agricultural production, national defense, space navigation and so on. Because of the requirement of the accuracy, the measuring technology has become a key point of the manufacture of optical components. The reasonable measuring method is paling an importan...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械电子工程学号：1992007115113

A Study on Capital Subscription by Intellectual Property under the Qualification of Subscripted Capital

在如今的知识经济时代，知识产权类财产的投入对于创业投资起着关键作用，以知识和技术为核心的创业已经成为最主要的创业形式之一。经济的发展产生对与之相适应的生产关系的迫切要求，而作为生产关系的重要体现——法律制度的设计，也应随着经济的发展作出调整，从而能促进生产力的发展。我国《公司法》现行立法关于对知识产权出资的规定在范围、比例、程序和责任制度存在不完善之处，已无法适应经济发展的时代要求，与国外相关立法也存在差距。因此，本文力图重新定位公司资本制度的价值目标，修正现物出资的适格性标准，并以知识产权与出资适格性的对照分析以及实证考察为基础，对知识产权出资制度的重构提出建议。本文的论述除导言与结语外，共...In the knowledge economic era, intellectual property plays a key role in the field of beginning business investment. Beginning business with the core being knowledge and technique has been one of most important types in their family. The development of economics raises an urgent need for corresponding production relations. Therefore, legal institution, as an important embodiment of production rela...学位：法学硕士院系专业：法学院法律系_经济法学学号：20020806

如何实现保护商业秘密与劳动者自主择业权的平衡

与离职员工签订竞业禁止合同是企业保护其商业秘密广泛采取的方式,竞业禁止合同的存在,有一定法理依据,但是也存在与保护劳动者自主择业权相冲突之处,法律必须对竞业禁止合同进行必要的限制,从而实现保护企业商业秘密和劳动者自主择业权的平衡

The Novel Control Strategy Research on Resonant Bridge Modular Switched-Capacitor Converter

在提出的一款谐振型桥式模块化多电平开关电容变换器拓扑基础上,提出了移相加PWM的控制策略。该控制策略实现了变换器高频开关(MOSFET)的零电流、零电压开关,并在保证变换器较高效率运行的基础上,实现了变换器输出电压的可调性,解决了回路峰值电流过大或过小的问题。详细分析了开关电容变换器高频开关移相角与输出电压和回路峰值电流之间的关系,并通过仿真软件SABER和硬件平台对所述控制策略下的软开关、输出电压、峰值电流特性进行了验证,仿真结果与实验结果均证实了上述结论。This paper presents a phase shift plus PWM control strategy for the novel resonant bridge modular multilevel switched-capacitor converter. The proposed method ensures that almost all switching devices keep zero current switching or zero voltage switching, which achieves a high system efficiency. Meanwhile, the output voltage is regulated and the loop peak current is limited in a proper range. The impacts of the switching phase of metal-oxide-semiconductor field-effect transistors( MOSFETs) on both the output voltage and the loop peak current are deduced,respectively. By means of simulation software Saber and hardware platform,the proposed characteristics of soft switching,output voltage,and peak current are verified well.国家自然科学基金(61671400);; 中央高校基本科研业务费(20720150088);; 广东省自然科学基金(2016A030313657);; 福建省科技计划项目(2014H6026);; 福建省自然科学基金(2015J201274)资

Identification of Spatio-Temporal Variation in the Seaside Water Quality Along Macau Peninsula

采用聚类分析和判别分析技术对澳门半岛近岸海域22个监测点2000--2005年期间的监测数据进行水质时空分析,旨在识别澳门半岛近岸海域水质时空变化特征,从而为澳门半岛水质监测网络的优化和近岸海域水质的控制提供支持.监测点位取样时间聚类结果可分为6--9月和1--5月、10--12月2组,与传统的4--9月和10--3月的丰、枯水期划分存在差异;按采样点位的空间聚类结果显示,第1组的监测站点都位于西侧,第2组的监测站点都位于东侧和南侧.通过后退式判别分析,表征空间差异性的显著性指标为PH、氯化物、TSS、颜色;表征时间差异性的显著指标为总磷、氯化物、颜色、氨氮、溶解氧、化学需氧量.空间与时间差异性判别的正确率分别达到84.82%和76.57%,显示后退式判别分析具有较好的指标降维能力和判别能力.Cluster analysis(CA) and discriminant analysis(DA) were coupled to identify the spatial and temporal variation of the seaside water quality for 14 parameters and 22 different sites along Macau Peninsula,so as to identify the temporal and spatial variation for further optimizing the monitoring network and controlling the seaside water quality along Macau Peninsula.The results show that 12 months could be grouped into two periods,June-September and the remaining months,and the entire area was divided into two clusters,one located at western sides of Macau Peninsula,and another one is in southeast and southern sides of the Macau peninsula.Through backward stepwise DA,pH,Cl---,TSS,color and TP,Cl---, color,NH--+_4,DO,COD were identified as the discriminant variables of spatial and temporal variation,with 84.82% and 76.57% correct assignments,respectively.This study illustrates the application of multivariate statistical techniques is beneficial for understanding the temporal and spatial variation of seaside water quality and further effective water quality management.福建省青年人才项目(2007F3093

Development and application of cup truer in advanced optical grinding

对于金刚石砂轮修整,尤其是有高精度要求的圆弧金刚石砂轮,杯形砂轮修整技术可以获得较好的砂轮磨削性能以及修整效率。本文开发了配套超精密平面磨床使用的杯形修整器,分析了其机械误差影响,并完成了修整实验及砂轮表面测量及半径拟合处理,从宏观上考察了该修整器对砂轮磨削性能的提高,结果证明该修整器可以进行有效修整,提高了加工工具精度,能满足金刚石砂轮修整使用要求。For the diamond wheel truing and dressing,especially for high precision arc diamond wheel,the GC cup truing technology is often adopted to obtain fine grinding performance and truing efficiency.This paper presents a cup truer used in surface grinding machine,and analyzes the influence of mechanical error.Truing and dressing experiments and surface measurement of grinding wheel are carried out to obtain improvement of grinding performance and accuracy.The results show that the cup truer developed can well meet the truing and dressing demand.863计划重点项目(2008AA042501);福建省科技重大专项/专题(2006HZ0002-4

膜技术处理赖氨酸生产废水的研究

为了确定赖氨酸生产废水经过膜技术处理后废水中的CODcr值的大小 ,我们采用超滤与纳滤相结合的工艺分别对浓废水和稀废水进行中试实验。实验结果表明 :采用超滤 -一级纳滤 -二级纳滤工艺流程处理浓废水 ,终端废水的CODcr值降低到 489mg/L ;采用超滤 -纳滤流程处理稀废水 ,最终透析液的CODcr值可以降低到 5 0 2mg/L。大大减轻了后续生化处理的负荷