基于人体感应的智能紫外线消毒控制系统设计

针对办公环境的消毒要求,使用嵌入式微处理器STM32F103C8T6作为控制单元,采用蓝牙作为无线通信协议,再配合红外人体感应模块和语音提示,利用紫外线消毒的特性,设计了一款智能紫外线消毒控制系统。该系统能够远程配置消毒时间段,自动根据配置的时间进行消毒,并在紫外线消毒期间对进入消毒区域进行人体检测和语音提示。既有效完成了办公环境紫外线消毒需求,也避免了紫外线辐射对人体的危害,同时实现了智能化和远程控制,节省了人力和物力。     

A wireless multi-channel implantable neural recording microsystem based on optimized analog TDM-FDM combination

Crosstalk noise (CT) is a limiting factor to increase the number of channels in analog Time-Division-Multiplexing (TDM)-based Wireless Neural Recording microsystems (WNRs). This paper proposes a novel approach to mitigate and decrease the effect of the CT by combining TDM with Frequency-Division-Multiplexing (FDM). In particular, we evaluate some possible configurations of the TDM-FDM combination and present a system that has less CT than other configurations. A 12-channel WNR based on the proposed system is designed in both system and circuit-level. In this system, channels are first divided into three 4-channel groups and after multiplexing in time domain, they are combined together with FDM method. While the group containing the marker pulse is located in the base-band, the second and third group are shifted to the frequency domain by employing quadrature modulation. The circuit-level of the system is designed and simulated by using 0.18 μm CMOS technology. The designed circuit consumes a power of 1.4 mW at a supply voltage of 1.8 V. The performance of the proposed system is also compared with simple TDM-based WNR. Simulations shows that in the proposed system the CT is considerably decreased.     

Phosphor SrZrO3:Sm3+ with fluorescence modulation and photochromic characteristics for erasable optical storage

At present, for inorganic photochromic materials, the single function limits their application level in the field of optical storage and anti-counterfeiting. Generally, the reversible modulation of photoluminescence is achieved through a photochromic process, thereby improving the ability of the photochromic material to store information. Here, we designed a Sm³⁺ doped perovskite oxide (SrZrO₃:Sm³⁺) inorganic photochromic material. Combined with its red photoluminescence and photochromic properties, it can realize dual information storage and recognition functions. The fluorescence regulation function is realized by the doping of Sm³⁺, which is conducive to the application in the direction of optical switch. The mechanism of photoluminescence and photochromism was studied. Finally, a flexible film with SrZrO₃:Sm³⁺ material was fabricated to demonstrate rewritable optical recording and storage and reading of dual optical information.     

High efficiency panchromatic photopolymer recording material for holographic data storage systems

Studies carried out to gauge the potential of a metal-ion doped panchromatic photopolymer recording material for application in real-time holographic data storage is presented. The photopolymer films are spin coated on glass plates to ensure better surface uniformity. Volume holographic transmission gratings with peak diffraction efficiency of 80% could be stored in the photopolymer films of 100 μm thickness. An efficiency of 70% is achievable even for gratings recorded with exposure energy as low as 10 mJ/cm². A checkerboard pattern data page recorded in the photopolymer film using a defocused 4-f recording geometry could be reconstructed with good image quality. The experimental results illustrate the competency of the developed photopolymer for holographic data storage applications.     

影视作品配音技巧和情感表述

电影成为了我们生活中不可或缺的一项休闲项目,大到电影院,小到个人家庭,我们经常能够看到电影的身影,甚至对于一些影迷来说,为了等待一部电影能够做到茶不思饭不想,然而对于电影来说,除了夸张的特效和完美的演技之外,还需要高水平的配音,从翻译配音到替代配音,这些配音的演员们需要对配音的技巧进行合理的展示和对情感的表达进行完美的诠释.     

基于MPU6050模块的飞行姿态记录系统设计

为了实现对固体燃料低空模型火箭飞行姿态自动记录的需求,提出了一种基于MPU6050模块的飞行姿态记录系统设计方案,并完成系统的软硬件设计.该系统的硬件部分主要用来采集加速度模拟量并进行存储,软件部分采用C语言进行编程,完成数据读写和上传,数据处理借助上位机软件进行,还原实际飞行姿态.实际应用表明,该系统具有成本低廉、灵敏度高的特点,达到了设计要求.     

基于“北斗”的语音通讯传输

北斗卫星导航系统是我国自主研发且具有通信能力的区域性卫星导航系统,具有其他导航系统不具备的双向短报文通信功能。针对用户在抢险救灾等各种复杂环境中对语音通讯的需要,在北斗卫星导航系统短报文通信功能的基础上,设计一种可用于语音传输的系统。基于现有的北斗通信终端通过硬件扩展实现语音通信传输功能;通过语音压缩技术解决大量语音数据有效传输的问题。结合试验对语音数据进行分析,系统能顺利进行语音通信,语音质量达到预期效果。     

混合式高压直流断路器数据监测平台的研制

为了监视和控制级联全桥混合型直流断路器,为设备选型、断路器故障分析等提供实测数据,在介绍国网智能电网研究院研发的级联全桥混合型直流断路器工作原理基础上,总结高压电力电子器件的高压建模和结温计算所需数据,设计出一套实用的高压直流断路器监测平台。该监测平台采用Labview进行界面开发,具有全面的遥测、遥信显示记录功能和高频率采样的故障录波功能,能够在线计算IGBT和其并联二极管的结温,并经实验验证了监测平台的运行效果。     

GSM多功能基站无线语音通信研究

基于GSM多功能基站的手机终端接入功能,实现其语音通信功能。首先开通基站的语音呼叫业务,然后将原始语音形成语音发送脉冲,最后将手机锁定在基站工作,对语音功能进行测试。根据多功能基站的功能和性能要求,不仅实现其语音通信功能,且使之具有呼叫异常处理能力,功能设计上相对商用基站也作了一些改进。实验证明：锁定在多功能基站工作的手机能收到基站发送的语音信息。     

齿轮传动系统动力学的研究方向

介绍了齿轮传动系统的振动和噪声问题,对存在的问题做了详细解释,在理论上对齿轮传动机构的振动与噪声问题进行一些有益的探索,并阐述了目前齿轮系统动力学研究的发展方向。