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This paper reports an ultra-miniaturized glucose sensor using ZnO nanorod-based field effect transistor (FET) to continuously monitor glucose concentration in real time. The FET sensor is fabricated via hydrothermal growth of semiconducting ZnO nanorods between source and drain microelectrodes with alternating current (AC) electric-field assistance. ZnO nanorod structured FET acts as a frequency mixer...
This paper proposes a distributed filtering scheme over sensor networks with topology switching and topology-dependent event-triggered transmission schemes. A new monitoring mechanism is introduced to identify the topology switching instants, and the system output is sampled by sensors when the network topology switches. Based on the time-varying sampled-outputs, a group of distributed topology-dependent...
Internet scale continues to expand, the IPv6 protocol standard is implemented in the network gradually, make the behavior characteristic of the network become more changeful and more unstable, so it can be more detailed to carry on network situation perception system according to network data stream to become the next research direction. The support of IPv6 Network Situation Awareness system is realized...
A hybrid balancing approach that combines active and passive balancing is presented for a modular battery management system (BMS) in electric-drive vehicles. The hybrid system combines advantages of module-level active balancing with cost-effectiveness of cell-level passive balancing. A module consists of a number of cells connected in series, with cell-level passive balancing performed within a module,...
In recent years, the PM2.5 (particulate matter with a mean aerodynamic diameter of 2.5 micrometers or less) pollution has become a very serious problem in China. Currently, there are three types of monitoring approaches: government-led monitoring, Wireless Sensor Networks (WSN) approaches and Participatory Urban Sensing (PUS). There are three limitations in these state-of-the-art research approaches:...
Interior permanent magnet synchronous machine drives are widely employed in electric traction systems and various industrial processes. However, prolonged exposure to high temperatures while operating can demagnetize the permanent magnets to the point of irreversible demagnetization. In addition, direct measurements with infrared sensors or contact-types sensors with wireless communication can be...
This paper proposes an enhanced approach to estimate the stator winding temperature based on active DC flux injection for induction machines with two representative direct torque control (DTC) schemes, the conventional hysteresis-based DTC and the deadbeat DTC. In this method, the stator resistance is regarded as the indicator of its temperature, and is estimated by applying offsets to the flux controllers...
Along with our country the implementation of the strategy of developing the new energy, solar energy is a kind of ideal clean energy future energy, with the power grid operation requirements of photovoltaic power generation system is increasing day by day, for the needs of the operation and control, is necessary for photovoltaic system monitoring, photovoltaic power plant key components of condition...
Video Synthetic Aperture Radar (ViSAR) is a novel technique to continuously monitor moving targets in the interested area. From the video echo provided by the ViSAR system, the motion trail of the moving target can be easily obtained. Therefore, the echo of the moving target should be carefully studied, which is important in practical application for moving targets tracking in ViSAR system.
Recently, 802.11ah with restricted access window for collision attenuation has been proposed for Internet of Things (IoT) applications. Random grouping of nodes in different access window is utilized to reduce the hidden node collision probability. However, when the coverage area of the sink node is large, the occurrence probability of hidden node problem is still high and severely impacts the system...
As the demand for structure healthy monitoring of civil engineering continues to grow at an unprecedented pace, the need for real time remote data compression and transmission systems becomes more prominent. In this paper, aiming at the problem of massive data transmission in the safety monitoring systems of the civil engineering applications, the GPRS wireless transmission terminal is designed to...
Fault detection and isolation (FDI), which is a critical part of modern industrial systems, plays a key role in the maintainability, safety, and reliability of processes. Existing FDI approaches are dependent on varying degrees of knowledge of the process, limiting their implementation in practical industrial processes. Based on the least absolute shrinkage and selection operator (lasso), this paper...
In the enterprise training, a digital telephone system with special functions is needed and there are no such products on the market. In this paper, a digital telephone system for training is designed based on CAN (Controller Area Network) bus and Ethernet. The SPC (Stored Program Controlled) telephone exchange is designed with distributed multi processors which communicate by CAN. In the system,...
Through calculations and analysis of the transmission loop of a circuit breaker, this paper establishes a non-linear mapping relationship between the rotational output of the spring operating mechanism in the transmission loop and the linear motion of moving contacts in the circuit breaker arc quenching chamber. It interprets the reason of why there is some error in routine mechanical property tests...
With the requirement of real-time and reliability on monitoring power transmission lines, this paper proposes a cooperative communication protocol with network coding in long-chain wireless sensor networks (WSN). The protocol makes full use of channel broadcast characteristics and cooperative communication. It applies the classical butterfly structure of network coding among the successive three hops...
IEC 61850 is an international standard for digital substation automation systems based on network communication platform. It has been widely used in power generation, transmission, distribution and scheduling. The protocol implemented unified modeling for object, enhanced interoperability and interchangeability between different terminals. In this paper, we apply the protocol is to power and environment...
Lightning invaded over-voltage is the main cause of insulation fault of electric apparatus. To acquire the actual substation lightning invaded over-voltage, a monitoring system based on arrester valve divider is proposed in this paper. The working principle and advantages of the proposed monitoring system is analyzed firstly. And then, the actual overvoltage waveforms are presented, which are recorded...
Passive acoustic recording has great potential for monitoring soniferous endangered and cryptic species. However, this approach requires analysis of long duration environmental acoustic recordings that span months or years. There is a variety of approaches to analysing acoustic data. However, it is unclear which approaches are best suited for monitoring of endangered species in the wild. Specifically,...
Cellular service providers continuously upgrade their network software on base stations to introduce new service features, fix software bugs, enhance quality of experience to users, or patch security vulnerabilities. A software upgrade typically requires the network element to be taken out of service, which can potentially degrade the service to users. Thus, the new software is deployed across the...
This paper introduces a dead-time optimization technique for a 2-level voltage source converter (VSC) using turn-off transition monitoring. Dead-time in a VSC impacts power quality, reliability, and efficiency. Silicon carbide (SiC) based VSCs are more sensitive to dead-time from increased reverse conduction losses and turn-off time variability with operating conditions and load characteristics. An...
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