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1.
臭氧气广泛用于医院、旅馆、工厂和公用场所的室内消毒、杀菌、除臭和净化空气,用于对医疗器具、餐具、茶具的消毒和食品保鲜。臭氧气处理装置能对矿泉水、自来水消毒和水净化。本文介绍了臭氧气制造方法及其在空气消毒、电冰箱除臭和水消毒中的应用。  相似文献   

2.
臭氧风机     
<正> 臭氧是一种强氧化消毒气体,它可以广泛应用于消毒、除臭、保鲜、防霉、清新空气及医疗等方面。本文介绍一种实用的臭氧风机。  相似文献   

3.
浅谈除臭技术在空调产品中的应用   总被引:1,自引:0,他引:1  
介绍了室内臭气的种类及来源,针对改善室内空气品质,提出常用的除臭方法。  相似文献   

4.
泵站除臭根据雨水和污水臭气源的特点,在臭气污染比较严重的泵站末端处理系统采用“生物除臭+洗涤除臭+干式化学吸附净化”的联合处理工艺,除臭后满足国家规定污染物浓度要求,并可根据实际工作环境情况调节风量、控制除臭风机的变频运行或关闭部分除臭设备,达到节能运行的效果。  相似文献   

5.
针对生活垃圾焚烧厂垃圾贮坑应急除臭问题,详细介绍了目前主要应用的活性碳吸附法、化学洗涤法和光催化氧化法的原理和特点。  相似文献   

6.
简述了紫外线空气消毒的三种方法:风管内照法、房间上照法及独立紫外消毒,并对其消毒效果、影响因素及优缺点进行了分析;介绍了紫外线消毒在中央空调系统中的应用,并对应用中的相关问题进行了分析。  相似文献   

7.
近年来,皖合肥、芜湖等地小家电市场欣欣向荣,品种多、款式新、数量大,然产品质量不过硬,形成了“喜优掺半”之格局。 在合肥城隍庙商场、百货大楼、龙图等商场,各类小家电琳琅满目,如电子消毒除臭器、电子按摩器、磁化枕、电子遥控器、电子点火器、微风电扇、石英闹钟,以及大量异彩纷呈的便携收音机等等,这些小家电新意浓,功能独到,给消费者提供了极大的方便。  相似文献   

8.
电气石空气过滤网的抗菌除臭负离子效果研究   总被引:1,自引:0,他引:1  
介绍研究电气石材料与PP树脂熔融纺丝并编织空气过滤网的抗菌、除臭、负离子效果及安全性。讨论天然电气石负离子材料与技术在空气过滤领域的应用前景。  相似文献   

9.
介绍一种以MCS-51单片机作为电冰箱温度控制器核心的控制电路。首先介绍了电冰箱的工作原理与控制要求,然后给出了具体硬件电路设计,主要包括主机电路、A/D转换电路、传感器的选择、键盘和显示电路、除臭和异味消除电路等,最后给出了主程序和中断服务程序控制流程图。  相似文献   

10.
目前国内各大冰箱电器集团已将除臭器装置作为发展方向之一。除臭器中以日本夏普公司推出的最为新颖有效。因为它集陶瓷臭氧发生芯片和触媒体于一体,并配以轴流风机,在箱体内形成环流,能有效地除臭保债鲜。除臭器用臭氧发生芯片两端施加不同高压,可产生出强弱不同的臭氧量、具有广泛的应用范围。  相似文献   

11.
Polymeric films that release disinfectant gas on demand have the potential to be useful for management of microbial burden (e.g., sterilization). Past attempts to create such films, however, have suffered from the need for stringent control over moisture or exposure to visible light prior to use. It is reported that polyvinyl alcohol (PVA) or polyolefin (POD) films that contain NaClO2 crystals can release ClO2 gas upon UV‐activation and exposure to moisture. In addition to showing that the concentration of gaseous ClO2 released from the polymeric films is sufficiently high for antimicrobial activity, fundamental insights into factors controlling ClO2 release are provided by using atomic force microscopy, optical microscopy, Raman microscopy, and time‐of‐flight secondary ion mass spectrometry. Specifically, by determining the sizes of the polymer‐dispersed NaClO2 particles, support for the hypothesis that UV light activates an interfacial layer of the NaClO2 crystals to generate ClO2 is obtained. Additionally, it is found that the half‐life of the UV‐activated state of NaClO2 depends on the reactivity of the polymer matrix. Because both PVA and POD possess properties analogous to polymers used in packaging films, it is concluded that the approach described in this study may enable introduction of deodorizing or antimicrobial functional properties into polymeric packaging.  相似文献   

12.
广告软件和间谍软件的危害与防治   总被引:2,自引:2,他引:0  
广告软件和间谍软件是在网络中收集用户信息的软件,通常它们潜伏在用户的计算机中并将收集的信息发回后台服务器。广告软件和间谍软件对计算机网络安全和用户隐私构成了极大威胁。本文探讨了广告软件和间谍软件的定义、危害、传播途径,并对预防和清除它们提出了建议。  相似文献   

13.
This paper describes the design and implementation of a hybrid intelligent surveillance system that consists of an embedded system and a personal computer (PC)-based system. The embedded system performs some of the image processing tasks and sends the processed data to the PC. The PC tracks persons and recognizes two-person interactions by using a grayscale side view image sequence captured by a stationary camera. Based on our previous research, we explored the optimum division of tasks between the embedded system and the PC, simulated the embedded system using dataflow models in Ptolemy, and prototyped the embedded system in real-time hardware and software using a 16-bit CISC microprocessor. This embedded system processes one 320 × 240 frame in 89 ms, which yields one-third of the rate of 30 Hz video system. In addition, the real-time embedded system prototype uses 5.7 K bytes of program memory, 854 K bytes of internal data memory and 2 M bytes external DRAM. Koichi Sato is a Ph.D. student in the Department of Electrical and Computer Engineering at The University of Texas at Austin. He earned his B.S. in University of Tokyo, Japan in 1993. He worked for Automotive Development Center in Mitsubishi Electric Corporation where he was involved in lane and automobile recognition in vehicle video processing products such as automatic cruise control and drowsiness detection systems. He enrolled in the current University at 1998 and received an M.S in 2000. In his Master's thesis he worked on human tracking and human interaction recognition. His current work includes velocity extraction using the TSV transform, object tracking, and 3D object reconstruction. Brian L. Evans is a tenured Associate Professor in the Department of Electrical and Computer Engineering at The University of Texas at Austin. His research and teaching efforts are in embedded real-time signal and image processing systems. In signal processing, his research group is focused on the design and real-time software implementation of ADSL and VDSL transceivers, for high-speed Internet access. In image processing, his group is focused on the design and real-time software implementation of high-quality halftoning for desktop printers, smart image acquisition for digital still cameras, and 3-D sonar imaging systems. In signal and image processing, Dr. Evans has published over 100 refereed conference and journal papers. Dr. Evans is the primary architect of the Signals and Systems Pack for Mathematica, which has been on the market since October 1995. He was a key contributor to UC Berkeley's Ptolemy Classic electronic design automation environment for embedded systems, which has been successfully commercialized by Agilent and Cadence. His BSEECS (1987) degree is from the Rose-Hulman Institute of Technology, and his MSEE (1988) and PhDEE (1993) degrees are from the Georgia Institute of Technology. From 1993 to 1996, he was a post-doctoral researcher in the Ptolemy project at UC Berkeley. He is a member of the Design and Implementation of Signal Processing Systems Technical Committee of the IEEE Signal Processing Society, and a Senior Member of the IEEE. He is the recipient of a 1997 National Science Foundation CAREER Award. J.K. Aggarwal has served on the faculty of The University of Texas at Austin College of Engineering since 1964 and is currently Cullen Professor of Electrical and Computer Engineering and Director of the Computer and Vision Research Center. His research interests include computer vision and pattern recognition focusing on human motion. A Fellow of IEEE since 1976 and IAPR since 1998, he received the Senior Research Award of the American Society of Engineering Education in 1992, the 1996 Technical Achievement Award of the IEEE Computer Society and the graduate teaching award at The University of Texas at Austin in 1992. He has served as Chairman of the IEEE Computer Society Technical Committee on Pattern Analysis and Machine Intelligence (1987--1989); Director of the NATO Advanced Research Workshop on Multisensor Fusion for Computer Vision, Grenoble, France (1989); Chairman of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition (1993), and President of the International Association for Pattern Recognition (1992--1994). He is a Life Fellow of IEEE and Golden Core member of IEEE Computer Society. He has authored and edited a number of books, chapters, proceedings of conferences, and papers.  相似文献   

14.
High efficiency video coding (HEVC) video codec applies different techniques in order to achieve high compression ratios and video quality that supports real-time applications. One of the critical techniques in HEVC is the Context adaptive Binary Arithmetic Coding (CABAC) which is type of entropy coding. CABAC comes at the cost of increased computational complexity, especially for parallelization and pipeline of these blocks: binarization, context modeling and binary arithmetic encoding. The Binarization (BZ) and de-Binarization (DBZ) methods are considered as important techniques in HEVC CABAC encoder and decoder respectively. Indeed, an important goal is to get high throughput in hardware architectures of CABAC BZ and DBZ in order to achieve high resolution applications. This work is the only one found on recent literature which focuses on design and implementation of full BZ and full DBZ compatible with H.265 and H.264. Consequently, a hardware architectures of BZ and DBZ are designed and implemented by using VHDL language, targeted an FPGA virtex4 xc4vsx25-12ff668 board and emulated with ModelSim. As a result, the implementation of BZ and DBZ can process 2 bins/cycle for each syntax element when operated at 697.83 MHz and 789.26 MHz, respectively. The proposed designs exhibits an improved high-throughput of 1395.66 Mbins/s for BZ and 1578.52 Mbins/s for the DBZ. The obtained Area Efficiencies in our proposed BZ and DBZ are about 0.544 Mbins/s/slices and 0.606 Mbins/s/slices, respectively, and it is better than many recent works.  相似文献   

15.
任炯炯  张仕伟  李曼曼  陈少真 《电子学报》2019,47(12):2524-2532
ARX(Addition,Rotation,Xor)算法基于模整数加,异或加和循环移位三种运算,便于软硬件的快速实现.不可能差分分析和零相关分析是攻击ARX的有效方法,攻击的关键是搜索更长轮数、更多数量的不可能差分和零相关区分器.目前很多的搜索方法都没有充分考虑非线性组件的性质,往往不能搜索得到更好、更准确的区分器.本文提出了基于SAT(Satisfiability)的ARX不可能差分和零相关区分器的自动化搜索算法.通过分析ARX算法组件的性质,特别是常规模加和密钥模加这两种非线性运算差分和线性传播的特性,给出了高效简单的SAT约束式.在此基础上,建立SAT模型进行区分器的搜索.作为应用,本文首次给出了Chaskey算法13条4轮不可能差分和1条4轮零相关区分器;首次给出了SPECK32算法10条6轮零相关区分器和SPECK48算法15条6轮零相关区分器;在较短的时间内,给出了HIGHT算法17轮的不可能差分和零相关区分器.与现有结果相比,无论是区分器的条数,还是搜索区分器的时间均有明显的提升.此外,通过重新封装求解器STP的输出接口,建立了自动化的SAT\\SMT分析模型,能够给出ARX算法在特殊输入输出差分和掩码集合下,不可能差分和零相关区分器轮数的上界.  相似文献   

16.
Towards Mobile Ubiquitous Service Environment   总被引:2,自引:0,他引:2  
In this article we present a perspective on future vision of mobile communications and services which is referred to as Mobile Ubiquitous Service Environment (MUSE). Based on analysis of wireless communications and services, we exploit a conceptual model for MUSE via a top-down approach. The conceptual model consists of three major elements: Terminal Service Environment (TSE), Network Service Environment (NSE) and User Identity (UID). The concept of Always the Best Experience (ABE) is addressed as the hinge in design and development such that the user-centric services could be provided automatically and intelligently in the future diverse wireless world Based on these, we further discuss the issues on design and implementation of architecture of future wireless communication system. Requirements for architecture brought by the new features of MUSE are listed. Moreover, we also address several tradeoffs that should be taken into consideration in design. Finally, the deployment challenges for MUSE, such as reflectiveness of system, security and privacy, as well as peer-to-peer AAA are predicted.Ji Yang received PhD degree on Circuit and System, Bachelor degree on Telecommunication Engineering from Beijing University of Posts and Telecommunications (BUPT) in 2002 and 1993 respectively. Currently, he is an associate professor of BUPT, chief technical supervisor of Wireless Technology Innovation Institute, and vice manager of MTlab of Sino-Germany Software Institute. He leads the research on service and application in Future Forum in China. He also made much contribution to the China Communication Standardization Association (CCSA), including the vision of future Mobile Ubiquitous Service Environment, architecture of future B3G mobile terminal, etc. His research interests include architecture design for mobile ubiquitous networks, theory of self-organization, etc.Zhang Ping is now the professor of Beijing University of Posts and Telecommunications and director of Wireless Technology Innovation (WTI) Institute, BUPT. He has also served on the senior member of C3G Group, China MOST 863 future mobile communication FuTURE project, vice-chairman of China FuTURE Forum, and member of Vision Committee of World Wireless Research Forum(WWRF), he was vice chair of WWRF in 2005. He is also invited as the consultants for many domestic and oversea communication companies. He is very active on the international research activity on Beyond 3G area. He also participated in several European projects such as E2R and MOCCA. Until now, he has published 6 books, around 400 publications in journals and conferences in the area of telecommunications. His main research interests are theory and applications in wireless communication area. He was awarded by government, city of Beijing and Ministry of Information Industry several times for his great contribution to the industry and research activity in China.Hu Zheng is a PH.D candidate in mobile communications engineering in Wireless Technology Innovation Institute (WTI) at Beijing University of Posts and Telecommunications (BUPT). He received B.S degree from Nanjing University of Posts and Telecommunications in 2002, majoring in computer communications engineering. He currently works on serivce aspects of mobile ubiquitous communication system with focus on design and performance evaluation of interaction protocols and services in self-organized service environment.Wang Xu received the B.Tech. degree in electronic engineering from Beijing Polytechnic University (now named as Beijing University of Technology), Beijing, China, in 2002. Now he is working for his Ph.D. degree in Wireless Technology Innovation (WTI) Institute, Beijing University of Posts and Telecommunications (BUPT). His current interests include wireless communications in personal area, ad hoc networks and peer-to-peer system.Li Yinong received the BS degree major in Telecommunication Engineering in 1993 from Beijing University of Posts and Telecommunications, the MS degree and PhD degree major in Telecommunication and Electronic System in 1995 and 2003 from the Beijing University of Posts and Telecommunications. He is currently a lecture of STE (School of Telecommunication Engineering) of BUPT. His main research interests include service modeling, service composition approach, and intelligent service. In BUPT, he has given several lectures to both graduate and undergraduate students such as Information Theory, Speech Recognition, Pattern Recognition and Artificial Intelligence.  相似文献   

17.
A study of the enhancement of the mechanical sensitivity of an area-changed capacitive accelerometer by optimization of the device geometry is presented. The movable mass of the accelerometer was designed with many fingers connected in parallel and suspended over the stationary electrodes composed of differential comb fingers by means of mechanical beams anchored onto the substrate. The maximum displacement possible based on the chosen design structure was determined. From this displacement value the spring constant was calculated, and based on this spring constant value various combinations of the beam length and width were selected. The lengths and the widths were then varied and simulated using the Coventorware 2001.3 software. This was done as theoretical analysis showed that the mechanical beam dimensions are significantly more dominant in the overall device sensitivity. The displacement and spring constant variations with the beam dimensions at an applied acceleration was observed and analyzed. The same process was done for the number of fingers, length and thickness of each finger. Each of these was done in isolation based on the optimum geometry of the mechanical beams and tested to ensure that alterations of these aspects do not have a significant effect on the overall sensitivity. The modal and harmonic analysis were also simulated and observed to ensure the linearity and the stability of the dominant mode of the operation of the device. Optimum results of the device geometry are presented and discussed, along with suggested next steps.Badariah Bais received the B.S. and M.S. degrees from the Worcester Polytechnic Institute, Worcester, MA, in 1990 and 1992, respectively. Since 1997, she has been serving at the Department of Electrical, Electronics and Systems Engineering at Universiti Kebangsaan Malaysia as a teaching staff. She is currently pursuing her Ph.D. in Microelectronics at the Institute of Microengineering and Nanoelectronics (IMEN) at Universiti Kebangsaan Malaysia. Her research interests include MEMS sensors and microfabrication. She is a member of the Institute of Electrical and Electronics Engineer (IEEE).Burhanuddin Yeop Majlis received his Ph.D. in Microelectronics from University of Durham, UK in 1988, MSc. in Microelectronics from University of Wales, UK in 1980 and BSc. (Hons.) in Physics from Universiti Kebangsaan Malaysia in 1979. Now he is the director of Institute of Microengineering and Nanoelectronics (IMEN). He is a senior member of the Institute of Electrical and Electronics Engineer (IEEE) and the Chairman of IEEE Electron Devices Malaysia Chapter since 1994. He is also a member of Malaysian Solid State Science and Technology (MSSS). He has published three text books in electronics and one book on Integrated Circuits Fabrication Technology for undergraduate courses and more than 110 academic research papers. His current interest are MEMS sensor for automotive and RF applications.  相似文献   

18.
An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.  相似文献   

19.
组呼通信在指挥调度中有着重要作用,而在一些地面没有基站的地方,就无法正常使用。卫星通信具有无视地形,通信范围广,不易受陆地灾害影响,易于建设等优点。把卫星通信和组呼通信结合在一起的卫星组呼通信技术兼顾两者的优点,能更好的发挥指挥调度这一作用。当前卫星组呼通信采用固定频率方式,组呼成员在一个频率下进行通信,这种方式实用性不好。本文研究的是移动卫星组呼,在GMR-1系统的基础上研究了卫星组呼通信中MAC层的功能,提出了MAC-Ready-Gcc、MAC-Dedicated-Gcc这两个为了支持组呼的状态,并针对在MAC层发生的PTT竞争提出了一种回退策略。  相似文献   

20.
介绍了GaAs,InP和GaN等几种重要化合物半导体电子器件的特点、应用和发展前景。回顾了GaAs,InP和GaN材料的材料特性及其器件发展历程与现状。分别讨论了GaAs基HEMT由PHEMT渐变为MHEMT结构和性能的变化,GaAs基HBT在不同电路应用中器件的特性,InP基HEMT与HBT的器件结构及工作特性,GaN基HEMT与HBT的器件特性参数。总体而言,化合物半导体器件与电路在高功率和高频电子器件方面发展较快,GaAs,InP和GaN材料所制得的各种器件电路工作在不同的频率波段,其在相关领域发展潜力巨大。  相似文献   

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