The Application of Duo-Core Architecture in Wireless Sensor Network Nodes

研究了采用超低功耗监控微控制器和高性能微处理器相结合的双核架构的无线传感器网络节点的实现。通过选用合适的芯片,从硬件上构建了基于双核架构节点的无线传感器网,基于APTEEN网络路由协议,根据实验环境将层次结构简化为平面结构,并进行了性能测试,将测试结果与现有的基于单核架构节点的的无线传感器网进行比较。结果表明双核架构在低功耗和高性能之间取得了平衡点,相对于单核结构具有以更低的功耗获取更高性能的优势。An ultra-low power monitoring microcontroller and a high performance microprocessor are used to realize a duo-core architecture in wireless sensor network nodes, and APTEEN network routing protocol is modified from the hierarchical structure to the plane structure under given experimental conditions. The wireless sensor network is built up and tested. The results show that compared with the existing single-core architecture in wireless sensor network nodes the new dual-core architecture nodes can easily realize fast data sampling and transmitting, therefore the sleep cycle of the entire wireless sensor network is greatly increased and power consumption greatly reduced.厦门大学引进人才科研启动基金资助(0000-X07191

Study on Large Scale Precision Measurement Platform for Optical Aspheric Lens

针对光学非球面元件精密面形测量的需要,提出了一种大尺寸精密检测平台的测量与控制技术。通过讨论检测平台离线测量原理,采用高精度直线电机、0.1μM接触式/非接触式测量传感器以及自主开发测量评价软件为核心的软硬件控制方案,完成了大尺寸精密检测平台的设计与搭建,并针对光学非球面元件的测量特点,开发了配套的测量软件,以实现大口径光学非球面元件的面形测量与评价。光学非球面元件的测量实验结果表明:该检测系统可以有效地应用于非球面表面形貌的精密测量。According to the requirement of precision measurement for optical aspheric surface,this paper presents a measuring and control means,which is based on large scale high-precision measurement platform.Through analyzing the off-machine measuring principle,a large scale measurement platform included high-precision linear motors,contacting and non-contacting measurement sensor of 0.1um resolution and a new developed of measuring software,is designed and built.Aiming at the measurement characteristics of optical aspheric lens,measuring software is developed to achieve surface metrology and evaluation for large scale optical aspheric lens.The experiment results indicated that the measuring system has met the needs of high-precision measurement.福建省自然科学基金资助项目(2012J05102); 厦门理工学院高层次人才引进项目(YKJ11029

高精度SC PIPELINED ADC预放大锁存比较器的分析与设计

提出了一种应用于开关电容流水线模数转换器的CMOS预放大锁存比较器。比较器采用了交叉耦合负载、PMOS/NMOS比例优化和电容中和技术。该结构大幅提高了比较器的速度并有效抑制了回馈噪声,减小了失调电压,可以作为Flash ADC应用于高精度开关电容流水线ADC

Analysis and design of preamplifier-latch comparator for high accuracy switched-capacitor pipelined ADC

提出了一种应用于开关电容流水线模数转换器的CMOS预放大锁存比较器。比较器采用了交叉耦合负载、PMOS/nMOS比例优化和电容中和技术。该结构大幅提高了比较器的速度并有效抑制了回馈噪声,减小了失调电压,可以作为flASH AdC应用于高精度开关电容流水线AdC。To be compatible with switched capacitor pipelined ADC,a CMOS preamplifier-latch comparator is designed and well analyzed for high speed,low kick-back noise and low mismatch offset.The cross-coupled load,capacitor neutralization and the optimizing ratio of PMOS/NMOS are adopted in the comparator.Since the proposed architecture is effective for achieving,the comparator has been used in high accuracy switched-capacitor pipelined ADC as Flash ADC.厦门市科技计划项目(3502Z20093002);福建省高校产学合作科技重大项目(2010H6026

高精度SC PIPELINED ADC预放大锁存比较器的分析与设计

提出了一种应用于开关电容流水线模数转换器的CMOS预放大锁存比较器。比较器采用了交叉耦合负载、PMOS/NMOS比例优化和电容中和技术。该结构大幅提高了比较器的速度并有效抑制了回馈噪声,减小了失调电压,可以作为Flash ADC应用于高精度开关电容流水线ADC

运用调和营卫法治疗产后痹浅析

产后痹是指妇女在产褥期或产后,出现肢体疼痛、酸楚、麻木、重着、畏风怕冷、以及关节活动不利等症状的疾病。古今医家在不断探索实践的过程中,对产后痹的认识各有独到的见解。调和营卫法是通过发表解肌的方法,调整机体营卫失衡的状态使其恢复营卫调和平衡的一种治疗方法。营卫不和可致机体正气亏虚,风寒湿邪极易乘虚而入,使外邪留著营卫,致营卫失和,发为本病。营卫不和为产后痹病因的基础,调和营卫法则为产后痹的治法总则。本文主要阐述产后痹关键在于营卫不和的机理,论证调和营卫法是治疗产后痹的重要大法。在临床上应用调和营卫法,以桂枝新加汤为基础,临床上随证加减,疗效确切

Exchange Rate Overshooting and Choice of RMB Exchange Rate System

汇率超调模型说明 ,均衡汇率的形成符合购买力平价理论。从长期角度分析 ,均衡汇率的决定取决于相对经济实力。我国虽然GDP稳步增长 ,但长期遗留的国情决定了我国的经济实力同发达国家相比差距仍然很大。因此 ,任由人民币随预期浮动升值为时尚早。从长远看 ,人民币汇率制度的改革方向是逐步实现人民币自由兑换 ,并增加人民币汇率的弹性和灵活性 ;从中短期分析 ,应完善人民币汇率的形成机制 ,实现以市场供求为基础的有管理的浮动汇率制。Exchange rate overshooting indicates that the formation of equilibrium exchange rate accords with the theory of purchasing par value. Analyzed from the long-term point of view, the decision of equilibrium exchange rate depends on relative economic strength. China's GDP has been increasing steadily, but the the long-time carry-over situation of our country determines that there is still a big gap between China and developed countries. Therefore, it's early for RMB free appreciation with expected floating. From the long-term point of view, the way for RMB reform is gradual convertibility and addition to its the elasticity and agility. From the point of view of middle and short term, the formation mechanism of RMB should be perfected to realize managed floating exchange rate based on market supply and demand

The Dissociation of Recollection from Familiarity in the Condition of Conceptual-similarity

该研究利用事件相关电位技术(ERPs),采用以汉字为实验材料的学习-再认范式,考察了语义相似性下回忆和熟悉性的分离。本实验结果表明:熟悉性效应主要体现在330-430ms的额区,而回忆效应主要体现在430-600ms的中央区和顶区。本实验在以汉字为实验材料的情况下证明了,早期额区的N400新旧效应反映了熟悉性,晚期顶区LPC新旧效应反映了回忆,从汉语材料的角度,为双加工过程假说提供了新的证据

语义相似性下回忆和熟悉性的分离

该研究利用事件相关电位技术(ERPs),采用以汉字为实验材料的学习-再认范式,考察了语义相似性下回忆和熟悉性的分离。本实验结果表明:熟悉性效应主要体现在330-430ms的额区,而回忆效应主要体现在430-600ms的中央区和顶区。本实验在以汉字为实验材料的情况下证明了,早期额区的N400新旧效应反映了熟悉性,晚期顶区LPC新旧效应反映了回忆,从汉语材料的角度,为双加工过程假说提供了新的证据

定向查询引擎在Web化学数据库集成检索中的应用

Internet上的化字数据库是重要的专业资源,基于超链按分析的搜索引擎还不能索引这类资源。本论文以充分利用In- ternet上的化学数据库数据为目标,将“一个查询发动多个同级检索引擎,并以结构化的方式组织信息”的方案应用于以化合物标识信息为检索入口的Web化学数据库,建立了一个基于多站点集成检索的Web数据库定向查询引擎。该引擎是一个包括用户交互层、中间检索层、数据提供层的三层Web模型。各层在系统内部分别对应于响应用户检索请求的客户端代理模块、集成远程Web信息的服务器端代理模块,以及提供缓存和检索的关系数据库模块。模型采用JSP+Java组件的开发方式, 在HTTP协议标准发送方法的基础上,采用XML技术对检索返回文档进行结构化数据的提取和表示,利用XML-DBMS实现XML数据的存储和检索,建立了一套针对深层Web数据交换的解决方案。依此方案所建立的ChemDB Portal Search实现了四个分布式Web化学数据库的有效加入、同时检索和统一显示。该系统是针对深层Web信息的挖掘和集成检索的一次尝试, 它可为其它领域建立类似的系统提供借鉴