摘要：A real-time data compression wireless sensor network based on Lempel-Ziv-Welch encoding(LZW)algorithm is designed for the increasing data volume of terminal nodes when using ZigBee for long-distance wireless *** system consists of a terminal node,a router,a coordinator,and an upper *** terminal node is responsible for storing and sending the collected data after the LZW compression algorithm is compressed;The router is responsible for the relay of data in the wireless network;The coordinator is responsible for sending the received data to the upper *** terms of network function realization,the development and configuration of CC2530 chips on terminal nodes,router nodes,and coordinator nodes are completed using the Z-stack protocol stack,and the network is successfully *** the final simulation analysis and test verification,the system realizes the wireless acquisition and storage of remote data,and reduces the network occupancy rate through the data compression,which has a certain practical value and application prospects.

摘要：To test the pulse signal of initiating explosive device (IED) in an aircraft,a multi-channel equivalent system for IED based on Gigabit Ethernet transmission is designed according to its electrical parameters. The output voltage of multi-channel equivalent circuit is converted by analog-to-digital converter (ADC). Then the validity of the converted signal is judged by field programmable gate array (FPGA). Finally,it is transmitted the host computer through Gigabit Ethernet for waveform displaying. Compared with the traditional equivalent equipment of IED,the designed system here can not only test the validity of the pulse signal and normal operation of equivalent circuit,but also realize fast and reliable analysis of pulse signal by means of Gigabit Ethernet. It solves the problems of low speed and lag of response of traditional equivalent equipment.

摘要：Due to complex computation and poor real-time performance of the traditional iris recognition system,iris feature is extracted by using amplitude and phase information of the mean image blocks based on Gabor filtering on image,and the k-nearest neighbor algorithm is combined to complete iris recognition *** recognition reduces the recognition time and improves the recognition *** the same time,identification result is transmitted to the cloud server through ZigBee network to solve diffcult wiring *** experiment shows the system runs stably and has fast recognition *** has been applied to a security system.

摘要：动画短片的制作往往能够充分展示一个动画人的艺术想像力与技术水平,因此成为为目前国内各高校动画专业进行教学与实践的重要方式,由此各类题材与风格的创作形成了一股清新的学院派动画景象.探讨其创意与制作流程,对动画创作者具有积极的意义.

摘要：以FPGA为核心,提出了一低通40阶线性相位FIR滤波器的硬件设计方案,利用分布式DA算法优化查找表LUT来简化乘法运算,降低了硬件成本;同时以MATLAB强大的运算能力为辅助,对滤波器系数设计初期和LUT进行验证和仿真,极大地降低了系统设计的复杂度,最终实现了低成本、高可靠性的数字滤波系统设计。

摘要：目的:研究落叶松阿拉伯半乳聚糖滴丸的制备工艺并初步探讨其速释机制。方法:采用正交设计对滴丸制备工艺进行优化,并通过相图分析和DSC分析研究滴丸的速释机制。结果与结论:滴丸制备最佳的工艺条件为药液温度75℃,二甲基硅油冷凝液上部温度30℃,滴头与冷凝液的距离6cm,滴速为30滴/min;相图分析和DSC分析结果显示在AG-PEG4000固体分散体中形成了某种形式的复合物,使熔点降低,药物在基质中的溶解度增加而达到速释。

摘要：以对激光陀螺的滤波为应用背景,利用FPGA内部RAM、ROM和乘法器IP核为核心,经过可靠的同步时序设计和稳定的逻辑控制设计,在低成本的情况下很好地实现了一种高阶滤波器的设计;并且具有良好的可移植性。使用该滤波器,极大地降低了系统成本和复杂度,可以使设计人员轻松地完成对激光陀螺的高阶滤波,而不需要提高系统硬件成本。

摘要：为了给弹体试验中所发生故障的机理分析提供重要的参考依据,介绍了一种基于HMC1043磁阻传感器的旋转弹转速测量系统的设计。设计主要采用了HMC1043三轴磁阻传感器和PIC24FV32KA301单片机芯片来完成系统功能。在详细阐述系统硬件设计的基础上,对软件设计进行了相应的介绍。实验结果表明:所设计的测量系统能比较准确地测出弹丸的转速。

摘要：以黄大线黄河特大桥主桥(120+4×180+120)m下承式连续钢桁梁结构为实际工程背景,研究非线性黏滞阻尼器对该桥抗震性能的影响。利用Midas/civil建立空间有限元模型,选用适合桥址处场地等级及地震特性的3条地震波,采用非线性时程分析方法,检算在活动墩与主梁之间设置液体黏滞阻尼器装置和无阻尼器的不同抗震效果。结论表明在活动墩与主梁之间设置液体黏滞阻尼器装置,有效协调各活动墩在动力作用下的参与工作,降低固定主墩地震力,有效提高主桥的地震设防标准。

摘要：针对传统的角速率陀螺仪存在的缺点与不足,根据电子隧道效应的特点,设计了一种新型基于隧道效应的微机械陀螺仪,运用计算机辅助软件ANSYS对其进行了建模和仿真.把电子隧道原理应用到微机械振动陀螺中对振动位移进行检测,结构简单,功耗低,抗干扰能力强,可靠性好,线性度高,具有很高的灵敏度,尤其在提高微机械振动陀螺的测量精度和灵敏度的方面显示其优势.