期刊文献+
共找到22篇文章
< 1 2 >
每页显示 20 50 100
A Low-Cost Smart Office Design Framework Using Arduino
1
作者 Ssemwogerere Rajab Nabagesera Veronica Kawalya +10 位作者 Melese Alemsra Tsehayu Logose Masitula Wamwoyo Faruk Rahman Shiddiqur Ekwaro Dominic Mbalyowere Pasis Maritah Nambobi Mutwalibi Sayo Nakeleh Turay Mugerwa Derrick Kasagga Usama Seguya Asad 《Advances in Internet of Things》 2023年第3期83-108,共26页
The main motive of our research work is security enhancement and light energy conservation. This paper describes a study investigating the potential of a controlled office solution by integrating the Internet of Thing... The main motive of our research work is security enhancement and light energy conservation. This paper describes a study investigating the potential of a controlled office solution by integrating the Internet of Things (IoT) with wireless sensor networks (WSNs). A prototype of a smart office is developed using a global system of mobile Bluetooth and Radio Frequency Identification (RFID) technology. The user can turn on and off the fan remotely at any time. This prototype focuses on security and provides human-friendly assistance when in or out of the Office by integrating a mobile application platform. The innovative automated smart Office is designed with intelligent Security doors, lights, alarms, temperature humidifiers, and bright Liquid Crystal Display (LCD) screens for viewing. Our study has opened up virtual possibilities for producing cheap innovative frameworks in this Generation of IoT and the fifth Generation (5G) technology. Therefore, when implemented, this innovation will ease and improve human quality of life. So, this paper aims to provide a low-cost, effective Internet of the things-based automated smart Office. 展开更多
关键词 Intelligent Office Automation System Wireless Sensor Networks Internet of Things ULTRASONIC Radio Frequency Identification ARDUINO
下载PDF
RESEARCHES ON THE STABILITIES OF ANALOG ELECTRONIC NEURAL NETWORKS
2
作者 曾黄麟 虞厥邦 《Journal of Electronics(China)》 1991年第2期175-179,共5页
A new method for analyzing the stabilities of analog electronic neural networks ispresented.The energy functions with clear physical meaning are derived by introducing the staticequivalent circuit models,which has exp... A new method for analyzing the stabilities of analog electronic neural networks ispresented.The energy functions with clear physical meaning are derived by introducing the staticequivalent circuit models,which has expanded the Tellegen Theorem for application on circuitanalysis.The method used to derive the energy functions of nets from first order differentialequations is valid for all first order continuous autonomous systems.The stability analysis ofcellular neural networks is made by the use of the stationary cocontent theorem.Some resultsare instructive for the network implementation on circuits. 展开更多
关键词 ANALOG ELECTRONIC NEURAL networks Continuous AUTONOMOUS systems Energy FUNCTIONS Asymptotical stability
下载PDF
HTTP-sCAN:Detecting HTTP-Flooding Attack by Modeling Multi-Features of Web Browsing Behavior from Noisy Web-Logs 被引量:3
3
作者 WANG Jin ZHANG Min +2 位作者 YANG Xiaolong LONG Keping XU Jie 《China Communications》 SCIE CSCD 2015年第2期118-128,共11页
HTTP-flooding attack disables the victimized web server by sending a large number of HTTP Get requests.Recent research tends to detect HTTP-flooding with the anomaly-based approaches,which detect the HTTP-flooding by ... HTTP-flooding attack disables the victimized web server by sending a large number of HTTP Get requests.Recent research tends to detect HTTP-flooding with the anomaly-based approaches,which detect the HTTP-flooding by modeling the behavior of normal web surfers.However,most of the existing anomaly-based detection approaches usually cannot filter the web-crawling traces from unknown searching bots mixed in normal web browsing logs.These web-crawling traces can bias the base-line profile of anomaly-based schemes in their training phase,and further degrade their detection performance.This paper proposes a novel web-crawling tracestolerated method to build baseline profile,and designs a new anomaly-based HTTP-flooding detection scheme(abbr.HTTP-sCAN).The simulation results show that HTTP-sCAN is immune to the interferences of unknown webcrawling traces,and can detect all HTTPflooding attacks. 展开更多
关键词 IP network DDoS relative entropy cluster algorithm
下载PDF
The Development of the Digital Oscilloscope Based on FPGA 被引量:1
4
作者 Gang Luo Jie Peng +2 位作者 Lu Ma Fei Yuan Yuanyuan Mao 《计算机科学与技术汇刊(中英文版)》 2013年第4期69-76,共8页
关键词 数字示波器 放大器 模拟数字 峰值频率
下载PDF
BLOCK H-MATRICES AND SPECTRUM OF BLOCK MATRICES
5
作者 HUANG Ting-zhu(黄廷祝) +1 位作者 LI Wen(黎稳) 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2002年第2期236-240,共5页
The block H-matrices are studied by the concept of G-functions, several concepts of block matrices are introduced. Equivalent characters of block H-matrices are obtained. Spectrum localizations characterized by G-func... The block H-matrices are studied by the concept of G-functions, several concepts of block matrices are introduced. Equivalent characters of block H-matrices are obtained. Spectrum localizations characterized by G-functions for block matrices are got. 展开更多
关键词 block H-matrix SPECTRUM G-FUNCTION EIGENVALUE irreducible matrix
下载PDF
THE ANALYSIS OF COMPATIBLE SYSTEM OF AMTI AND SAR
6
作者 赵志钦 熊思民 黄顺吉 《Journal of Electronics(China)》 1995年第4期336-342,共7页
Based on the analysis of Adaptive Moving Target Indication(AMTI) and the signal processing of Synthetic Aperture Radar(SAR), a complete compatible system of AMTI and SAR is put forward. The compatibility and effective... Based on the analysis of Adaptive Moving Target Indication(AMTI) and the signal processing of Synthetic Aperture Radar(SAR), a complete compatible system of AMTI and SAR is put forward. The compatibility and effectiveness of this system is prcved in theory. The results of simulation show that this system not only has good ability in stationary targets imaging but also has ability in detecting moving targets under the background of strong clutter. 展开更多
关键词 AMTI SAR Imaging processing Reference function CLUTTER SUPPRESSION Compatible SYSTEM CANCELLATION ratio
下载PDF
A NEW METHOD OF DOPPLER CENTROID ESTIMATION FOR SPACEBORNE SAR-AMPLITUDE CORRELATION METHOD
7
作者 刘国庆 黄顺吉 《Journal of Electronics(China)》 1994年第2期170-175,共6页
The linear relationship between Doppler centroid and range walking in spaceborne SAR data is analyzed, and a new method to estimate Doppler centroid is proposed, which is so called amplitude correlation method. Compar... The linear relationship between Doppler centroid and range walking in spaceborne SAR data is analyzed, and a new method to estimate Doppler centroid is proposed, which is so called amplitude correlation method. Compared with clutter-lock method which is widely used now, the new method has much less computation burden and is able to give higher estimation accuracy for a quasi-homogeneous scene or a non-homogeneous scene. This is clearly verified by the experimental results of estimating Doppler centroid for SEASAT-A raw data. 展开更多
关键词 SPACEBORNE synthetic APERTURE radar Range WALKING DOPPLER CENTROID estimation AMPLITUDE correlation
下载PDF
PERFORMANCE ANALYSIS OF LEAKY BUCKET ALGORITHM WITH BURSTY TRAFFIC INPUT IN ATM NETWORKS
8
作者 孙海荣 李乐民 《Journal of Electronics(China)》 1995年第2期105-112,共8页
A bursty traffic model is introduced in this paper to describe the statistical characteristics of packet video. The performance of leady bucket algorithm with bursty traffic input is analyzed. The influences of variou... A bursty traffic model is introduced in this paper to describe the statistical characteristics of packet video. The performance of leady bucket algorithm with bursty traffic input is analyzed. The influences of various parameters on QOS (Quality of Service) are investigated. The analysis shows that although the loss probability decreases through expanding the buffer capacity, the delay and delay jitter increase, whose effect on QOS will not be negligible. 展开更多
关键词 Communication NETWORK ATM NETWORK USAGE parameter control LB ALGORITHM Bursty TRAFFIC
下载PDF
ANALYSIS OF RANGE ALIGNMENT IN INVERSE SYNTHETIC APERTURE RADAR IMAGING
9
作者 皮亦鸣 黄顺吉 《Journal of Electronics(China)》 1993年第4期365-370,共6页
In this paper,the basic theory of range alignment in Inverse Synthetic ApertureRadar(ISAR)imaging is analyzed.Two new methods of range alignment are proposed:one ispeak point alignment;another is direct range-alignmen... In this paper,the basic theory of range alignment in Inverse Synthetic ApertureRadar(ISAR)imaging is analyzed.Two new methods of range alignment are proposed:one ispeak point alignment;another is direct range-alignment.Based on the measured radar data,thedifferences between the above-mentioned new methods and the amplitude correlation method arediscussed,resulting in the confirmation on the superiority of the direct range-alignment method. 展开更多
关键词 ISAR Range-alignment AMPLITUDE mean variance
下载PDF
Think upon Cultivating Domestic High-class Practitioners of Industrial Embedded Software Development
10
作者 LIAO Yong QIN zhiguang LEI Hang 《计算机教育》 2012年第10期61-63,共3页
Domestic situation of embedded software practitioners in the industry field is analyzed in this paper,based on which the new requirements for personnel working for embedded software R&D are proposed.Then reform no... Domestic situation of embedded software practitioners in the industry field is analyzed in this paper,based on which the new requirements for personnel working for embedded software R&D are proposed.Then reform notions in higher education system upon cultivating high-class practitioners are presented. 展开更多
关键词 Industrial Practitioners CULTIVATION Embedded Software Development
下载PDF
Temperature-controlled mode selection of Er-doped random fiber laser with disordered Bragg gratings 被引量:4
11
作者 W.L.Zhang Y.B.Song +3 位作者 X.P.Zeng R.Ma Z.J.Yang Y.J.Rao 《Photonics Research》 SCIE EI 2016年第3期102-105,共4页
In this paper, we proposed a way to realize an Er-doped random fiber laser(RFL) with a disordered fiber Bragg grating(FBG) array, as well as to control the lasing mode of the RFL by heating specific locations of the d... In this paper, we proposed a way to realize an Er-doped random fiber laser(RFL) with a disordered fiber Bragg grating(FBG) array, as well as to control the lasing mode of the RFL by heating specific locations of the disordered FBG array. The disordered FBG array performs as both the gain medium and random distributed reflectors, which together with a tunable point reflector form the RFL. Coherent multi-mode random lasing is obtained with a threshold of between 7.5 and 10 mW and a power efficiency between 23% and 27% when the reflectivity of the point reflector changes from 4% to 50%. To control the lasing mode of random emission, a specific point of the disordered FBG array is heated so as to shift the wavelength of the FBG(s) at this point away from the other FBGs.Thus, different resonance cavities are formed, and the lasing mode can be controlled by changing the location of the heating point. 展开更多
关键词 MODE Temperature-controlled mode selection of Er-doped random fiber laser with disordered Bragg gratings
原文传递
Improved Non-Local Means Algorithm for Image Denoising 被引量:4
12
作者 Lingli Huang 《Journal of Computer and Communications》 2015年第4期23-29,共7页
Image denoising technology is one of the forelands in the field of computer graphic and computer vision. Non-local means method is one of the great performing methods which arouse tremendous research. In this paper, a... Image denoising technology is one of the forelands in the field of computer graphic and computer vision. Non-local means method is one of the great performing methods which arouse tremendous research. In this paper, an improved weighted non-local means algorithm for image denoising is proposed. The non-local means denoising method replaces each pixel by the weighted average of pixels with the surrounding neighborhoods. The proposed method evaluates on testing images with various levels noise. Experimental results show that the algorithm improves the denoising performance. 展开更多
关键词 IMAGE DENOISING NON-LOCAL MEANS GAUSSIAN Noise
下载PDF
Temperature-induced dissociation reaction and dynamics of light-harvesting complex II isolated from purple photosynthetic bacterium Rps.palustris 被引量:1
13
作者 FENG Juan LI XueFeng LIU Yuan 《Chinese Science Bulletin》 SCIE EI CAS 2007年第8期1029-1035,共7页
Steady-state absorption spectroscopy,circular dichroism,and resonance Raman spectroscopy have been used to investigate the thermal stability of LH2 complex isolated from purple photosynthetic bacterium Rps.palustris.T... Steady-state absorption spectroscopy,circular dichroism,and resonance Raman spectroscopy have been used to investigate the thermal stability of LH2 complex isolated from purple photosynthetic bacterium Rps.palustris.The results show that:1)upon increasing the temperature,a transition from B800 and B850 to free bacteriochlorophyll(B780)happens;2)a gradual decrease and disappearance of CD signal in visible region occur;3)a shift of the frequency,belonging to C==C and C—C stretching vibration,to higher wavenumber takes place.It is suggested that LH2 complex can be dissociated in the presence of B800,B850 and carotenoids simultaneously.Single-exponential fitting on the dynamic decay curves gives the apparent time constants of hundreds of minutes for various pigments. 展开更多
关键词 紫色光合细菌 沼泽红假单胞菌 温度诱导离解反应 反应动力学 捕光配合物Ⅱ
原文传递
Image Denoising Combining the P-M Model and the LLT Model 被引量:1
14
作者 Qian Yang 《Journal of Computer and Communications》 2015年第10期22-30,共9页
In this paper, we present a noise removal technique by combining the P-M model with the LLT model. The combined technique takes full use of the advantage of both filters which is able to preserve edges and simultaneou... In this paper, we present a noise removal technique by combining the P-M model with the LLT model. The combined technique takes full use of the advantage of both filters which is able to preserve edges and simultaneously overcomes the staircase effect. We use a weighting function in our model, and compare this model with the P-M model as well as other fourth-order functional both in theory and numerical experiment. 展开更多
关键词 P-M MODEL LLT MODEL FOURTH-ORDER PDES COMBINATION Image DENOISING
下载PDF
Network on Chip-based Fault Tolerant Routing Algorithm and Its Implementation 被引量:1
15
作者 Shuyan Jiang Shanshan Jiang, Jiang, Peng Liu Yue Liu He Cheng 《计算机科学与技术汇刊(中英文版)》 2013年第4期55-61,共7页
关键词 路由算法 互联网 网络 路由数据
下载PDF
企业级信息系统IT规划与需求分析方法研究(英文)
16
作者 张帆 雷航 《中山大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第S2期105-108,共4页
Through the analysis of problems in corporate informationization system,the paper puts forward solution of IT planning and processing optimization in this regard toward the co-existence of multiple systems,information... Through the analysis of problems in corporate informationization system,the paper puts forward solution of IT planning and processing optimization in this regard toward the co-existence of multiple systems,information isolation phenomena,and the communication between and among information systems.This method is supposed to have solved successfully such problems in the corporate application as obtainment of demands and promotion of information system performance. 展开更多
关键词 IT PLANNING process optimization SOFTWARE system structure BPR/BPI
下载PDF
Critical Exponent for a Porous Medium Equation with Inhomogeneous Density
17
作者 Xie Li 《数学计算(中英文版)》 2013年第4期98-104,共7页
关键词 多孔介质方程 临界指数 非均匀 密度 电脑 pgt 初始值 时间
下载PDF
All-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier 被引量:7
18
作者 DUAN PinXiang CHEN LiGong ZHANG ShangJian ZHOU XiaoLi LIU YongZhi LIU Yong 《Chinese Science Bulletin》 SCIE EI CAS 2009年第20期3704-3708,共5页
An all-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier is presented.A theoretical model is built up to simulate the system performance.Experiment evidenc... An all-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier is presented.A theoretical model is built up to simulate the system performance.Experiment evidence is also provided.An extinction ratio improvement of 8.3 dB is obtained at a bitrate of 10 Gbit/s.In the BER measurements,6 dB improvement of the power penalty is achieved,clearly demonstrating the feasibility of the proposed scheme.Our approach has a simple structure,and allows photonic integration. 展开更多
关键词 半导体光放大器 偏振旋转 再生器 诱导 基础 全光 模拟系统 功率代价
原文传递
A fault tolerant model for multi-sensor measurement 被引量:1
19
作者 Li Liang Shi Wei 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2015年第3期874-882,共9页
Abstract Multisensor systems are very powerful in the complex environments. The cointegration theory and the vector error correction model, the statistic methods which widely applied in economic analysis, are utilized... Abstract Multisensor systems are very powerful in the complex environments. The cointegration theory and the vector error correction model, the statistic methods which widely applied in economic analysis, are utilized to create a fitting model for homogeneous sensors measurements. An algorithm is applied to implement the model for error correction, in which the signal of any sensor can be esti mated from those of others. The model divides a signal series into two parts, the training part and the estimated part. By comparing the estimated part with the actual one, the proposed method can iden tify a sensor with possible faults and repair its signal. With a small amount of training data, the right parameters for the model in real time could be found by the algorithm. When applied in data analysis for aero engine testing, the model works well. Therefore, it is not only an effective method to detect any sensor failure or abnormality, but also a useful approach to correct possible errors. 展开更多
关键词 COINTEGRATION Fault tolerant MEASUREMENT MULTI-SENSOR Turbine engine
原文传递
A 800 V dual conduction paths segmented anode LIGBT with low specific on-resistance and small shift voltage 被引量:1
20
作者 毛焜 乔明 +1 位作者 张波 李肇基 《Journal of Semiconductors》 EI CAS CSCD 2014年第5期36-41,共6页
A dual conduction paths segmented anode lateral insulated-gate bipolar transistor (DSA-LIGBT) which uses triple reduced surface field (RESURF) technology is proposed. Due to the hybrid structures of triple RESURF ... A dual conduction paths segmented anode lateral insulated-gate bipolar transistor (DSA-LIGBT) which uses triple reduced surface field (RESURF) technology is proposed. Due to the hybrid structures of triple RESURF LDMOS (T-LDMOS) and traditional LIGBT, firstly, a wide p-type anode is beneficial to the small shift voltage (VST) and low specific on-resistance (Ron,sp) when the anode voltage (VA) is larger than VST. Secondly, a wide n-type anode and triple RESURF technology are used to get a low Ron,sp when VA is less than VST. Meanwhile, it can accelerate the extraction of electrons, which brings a low turn-off time (Toff). Experimental results show that: VST is only 0.9 V, Ron,sp (Ron × Area) are 11.7 and 3.6 Ω · mm^2 when anode voltage VA equals 0.9 and 3 V, respectively, the breakdown voltage reaches to 800 V and Toff is only 450 ns. 展开更多
关键词 LIGBT segmented anode shift voltage specific on-resistance 800 V
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部