- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - Maharashtra State, India (2018.6.12-2018.6.13)] 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - Synchronization of Solar Inverter with Power Grid
摘要： In solar panel inverter, we use to provide the power supply to the residential load using inverter and if our residential load does not require power supply then power is supplied to the power grid. If the grid voltage is 230V and the inverter supply is 300V then it means that we step down the inverter 300V supply voltage to the 230V, also the current and voltage are in phase with each other. The supply voltage from the solar panel is given to the DC to DC converter. Also the current and voltage from the solar panel is given as a gate signal to the converter through the MPPT. The supply voltage taken from the DC to DC converter is applied across the battery as well as across the residential AC load or to the power grid via PWM inverter. The inverter is utilized to change over direct present (DC) to alternating current (AC). Such a AC supply we can provide to the residential load as well as to the grid also, such a system we are designing using the MATLAB SIMULINK software.
关键词： Photovoltaic (PV) Cell,Pulse width modulation(PWM),Grid synchronization
更新于2025-09-10 09:29:36
-
Finite-time synchronization of memristor chaotic systems and its application in image encryption
摘要： This paper investigates the finite-time synchronization of memristor chaotic systems (MCSs). First, an emulator circuit of memristor is designed to implement the MCSs. Then, based on the presented emulator circuit, the model of the MCSs is provided and its finite-time synchronization is successfully achieved under the proposed controller. Thereafter, the stability analysis of the closed-loop dynamics is derived and the effectiveness of the theoretical results is testified via numerical simulations. Finally, an image encryption algorithm is proposed based on MCSs. The statistical performance analysis reflects the effectiveness of the image encryption algorithm and shows its potential applications in secure communication.
关键词： Memristor chaotic systems,Finite-time synchronization,Image encryption,Memristor emulator circuit
更新于2025-09-10 09:29:36
-
Hemodynamic and neuronal responses to cocaine differ in awake versus anesthetized animals: Optical brain imaging study
摘要： Cocaine is a highly addictive drug with complex pharmacological effects. Most preclinical imaging studies investigating the effects of cocaine in the brain have been performed under anesthesia, which confounds findings. To tackle this problem, we used optical imaging to compare the effects of cocaine in the awake versus the anesthetized state. For this purpose, we customized an air floating mobile cage to fit the multi-wavelength spectral and laser speckle optical imaging system and implanted a multi-layer cranial window over the mouse somatosensory cortex. Results showed significant differences in neuronal activity and hemodynamics at baseline and in response to cocaine between the awake and the anesthetized state (isoflurane anesthesia). Specifically, 1) at baseline isoflurane dilated cerebral vessels, increased cerebral blood flow and depressed neuronal Ca2+ activity compared to the awake state; 2) acute cocaine (1 mg/kg iv) vasoconstricted blood vessels (arteries and veins) and decreased cerebral blood flow and oxygenated hemoglobin in the anesthetized state but not in the awake condition; 3) cocaine increased the accumulation of mean intracellular Ca2+ in neurons in the anesthetized state but not in the awake condition; and 4) in the awake state acute cocaine increased neuronal activities (increased the frequency of Ca2+ transients) and increased neuronal synchronization. We also corroborated that in the wake state cocaine also disrupted neurovascular coupling. These findings indicate that both vascular and neuronal responses to cocaine are influenced by isoflurane anesthesia, which highlights the importance of imaging awake animals when studying the effects of cocaine or other drugs in the brain.
关键词： oxygenated hemoglobin,Neuronal [Ca2+]i activity,Addiction,neurovascular coupling,GCaMP6f,cerebral blood flow,Neuronal synchronization,Vasoconstriction,Isoflurane
更新于2025-09-10 09:29:36
-
[IEEE 2018 11th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) - Budapest (2018.7.18-2018.7.20)] 2018 11th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP) - FSO Communication for High Speed Trains: Blind Data Detection and Channel Estimation
摘要： We consider an free-space optical (FSO) system for high-speed trains where the sampling clock offset is randomly changing and the receiver does not have any information on the instantaneous channel fading coef?cient. Based on the use of multiple samplers at the receiver, we propose a novel sequence blind detection method, thus without requiring any pilot symbol. Furthermore, using the detected data, we propose a channel estimation scheme for the considered system.
关键词： Free-space optical communications,atmospheric turbulence,time synchronization,data detection
更新于2025-09-10 09:29:36
-
[IEEE 2018 International Conference on Indoor Positioning and Indoor Navigation (IPIN) - Nantes, France (2018.9.24-2018.9.27)] 2018 International Conference on Indoor Positioning and Indoor Navigation (IPIN) - A Real-Time UWB Multi-Channel Indoor Positioning System for Industrial Scenarios
摘要： Tracking products, machines and important objects in factories is a key task for future efficient manufacturing processes. Providing workers and robots with accurate and reliable location information is the foundation for this innovation. In industrial facilities, the environment is more complex compared to consumer indoor positioning scenarios. Heavy machinery often blocks the line of sight path. Metal walls and surfaces increase reflections and multi-path effects. An ultra-wideband based time-difference-of-arrival positioning system is investigated. All base stations use four transceivers instead of one to increase the system robustness. Multi-path and non-line of sight situations are evaluated with respect to the channel effects and the influence on the position accuracy.
关键词： NLOS,indoor positioning,wireless synchronization,TDOA,multi-path,UWB
更新于2025-09-09 09:28:46
-
[ACM Press the 10th International Conference - Jaipur, India (2017.10.13-2017.10.15)] Proceedings of the 10th International Conference on Security of Information and Networks - SIN '17 - Parameters of the two-stage synchronization algorithm for the quantum key distribution system
摘要： The parameters of the two-stage synchronization algorithm for the auto-compensation quantum key distribution (QKD) systems are investigated. The synchronization algorithm does not provide for splitting a frame equal to the period of the optical clock to the time windows. The equipment operates in the search mode for receiving a photon. The equipment goes into test mode when receiving a photon. The reception of a photon in the test mode is possible only during the action of the strobe pulse. The rest of the time the channel does not react to photons and dark current impulses (DCI). The algorithm provides for sequential testing of frames with a stop at registration of the first photon. The algorithm makes a decision about the absence of a signal after a specified number of tests. The proposed algorithm makes it possible to use single-photon avalanche photodiodes (APDs) with a significant time delay between the moments of photon reception and the restoration of APD. Formulas for calculating the time characteristics of the synchronization algorithm in the search and test modes are obtained. A time of synchronization is obtained. A method for calculating the design parameters of the two-stage single-photon synchronization for a QKD system is proposed.
关键词： Quantum key distribution,synchronization,fiber optic line,photon impulse,polarization distortions
更新于2025-09-09 09:28:46
-
Image-based guidance of percutaneous abdomen intervention based on markers for semi-automatic rigid registration
摘要： Introduction: For percutaneous abdomen intervention (e.g. liver radiofrequency (RF) tumor ablation, liver biopsy), surgeons lack real-time visual feedback about the location of the needle on planning images, typically computed tomography (CT). One difficulty lies in tracking and synchronizing both the tool movement and the patient breathing motion. Aim: To verify the correspondence between rigid registration fiducial registration error signal and breathing phase. Material and methods: Designed markers that are clearly visible both in planning CT and on the patient during the intervention are proposed. Registration and breathing synchronization is then performed by a point-based approach. The method was tested in a clinical environment on 10 patients with liver cancer using 3D abdominal CT in the exhale position. Median rigid fiducial registration error (FRE) in the breathing cycle was used as a criterion to distinguish the inhale and exhale phase. Results: The correlation between breathing phase and FRE value can be observed for every patient. We obtained mean median FRE equal to 9.37 mm in exhale positions and 15.56 mm in the whole breathing cycle. Conclusions: The presented real time approach, based on FRE calculation, was integrated in the clinical pipeline, and can help to select the best respiratory phase for needle insertion for percutaneous abdomen intervention, in cases where only 3D CT is performed. Moreover, this method allows semi-automated rigid registration to establish the correspondence between preoperative patient anatomical model and patient position.
关键词： real-time rigid registration,percutaneous abdomen intervention,respiratory phase synchronization
更新于2025-09-09 09:28:46
-
A simple amplitude decision based symbol timing synchronization method for real-time IMDD-OOFDM systems
摘要： A simple amplitude decision based symbol timing synchronization method for real-time IMDD-OOFDM transmission systems is proposed and experimentally evaluated by using directly modulated DFB laser in 25? km SSMF. The experimental results show that the hardware resource consumption of the proposed synchronization technique is only 6% of the total system which can effectively release the computation complexity without sacri- ficing the synchronization accuracy. Less than 2 samples offset error of synchronization accuracy can be achieved at received optical power as low as ? 20?dBm without employing correlation and multiplication operations.
关键词： Amplitude decision,Real-time optical system,Symbol timing synchronization,IMDD-OOFDM transmission system
更新于2025-09-09 09:28:46
-
[IEEE 2018 IEEE 3rd International Conference on Image, Vision and Computing (ICIVC) - Chongqing (2018.6.27-2018.6.29)] 2018 IEEE 3rd International Conference on Image, Vision and Computing (ICIVC) - Design and Implementation of Binocular Vision System with an Adjustable Baseline and High Synchronization
摘要： In this paper, we present a baseline-adjustable and highly synchronous real-time binocular image acquisition system which is easy to realize. Binocular stereo vision is gradually applied to the field of robot navigation, industrial detection and virtual reality etc. However, most designs are not flexible in practice due to fixed baseline and they have longer production cycle and higher costs. We propose a novel solution by using an adjustable baseline to acquire binocular image with robust hardware part and parallel software part. Cameras can capture binocular images triggered by external trigger pulse generated via Raspberry Pi in 20 Hz with synchronization error in microsecond level. Since our system is highly synchronized and portable, easy to deploy and low-cost. It is more convenient to generate binocular datasets for SLAM experiments. Finally, we testify the design via ORB-SLAM2 system.
关键词： adjustable baseline,image capture,binocular system,high synchronization
更新于2025-09-09 09:28:46
-
Synchronized High-Speed Vision Sensor Network for Expansion of Field of View
摘要： We propose a 500-frames-per-second high-speed vision (HSV) sensor network that acquires frames at a timing that is precisely synchronized across the network. Multiple vision sensor nodes, individually comprising a camera and a PC, are connected via Ethernet for data transmission and for clock synchronization. A network of synchronized HSV sensors provides a significantly expanded field-of-view compared with that of each individual HSV sensor. In the proposed system, the shutter of each camera is controlled based on the clock of the PC locally provided inside the node, and the shutters are globally synchronized using the Precision Time Protocol (PTP) over the network. A theoretical analysis and experiment results indicate that the shutter trigger skew among the nodes is a few tens of microseconds at most, which is significantly smaller than the frame interval of 1000-fps-class high-speed cameras. Experimental results obtained with the proposed system comprising four nodes demonstrated the ability to capture the propagation of a small displacement along a large-scale structure.
关键词： high-speed vision,networked vision,frame synchronization
更新于2025-09-04 15:30:14