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Aiming at the problems that the implicit Runge-Kutta method is hard to programming use, and lack precision analysis of implicit Runge-Kutta methods, several classic five-stage implicit Runge-Kutta methods are used to compare their calculation accuracy and the sensitivity of calculation step. The study results provided a reference for the selection using of five-stage implicit Runge-Kutta methods.
With the large-scale application of modern information technology in networked control systems (NCSs), the security of networked control systems has drawn more and more attention in recent years. However, how far the NCSs can be affected by adversaries are few considered. In this paper, we consider a stability problem for NCSs under denial-of-service (DoS) attacks in which control and measurement...
Smartphone is widely used in indoor map construction with its build-in sensors. However, the low accuracy problem of build-in sensors always causes the collected user trajectories noisy. The significant problem we face is the low accuracy of walk heading estimated by build-in sensors because of phone heading fluctuation and magnetic field anomaly. This paper presents HiHeading - a high reliable crowdsourcing-based...
This study presents a high performance ion-selective field-effect-transistor (ISFET) based pH sensor utilizing commercial touch panel film (TPF) as the sensing material. The coated ITO/SiO2/Nb2O5 multilayer on the TPF is ideal for measuring dissociated hydrogen ions. A high transconductance MOSFET chip composed of 10 parallel FETs is used to convert the effective pH value into the equivalent gate...
Satellite networks can provide global coverage and broadband access to end users, thus enabling human communication worldwide. In satellite communication networks, routing is the key issue encountered by support services. Therefore, a novel Quality of Service (QoS) routing method (QRM) is proposed and evaluated in this study based on the characteristics of the low Earth orbiting satellite rosette...
The existing SPECT system for nuclear cardiac imaging suffered from low sensitivity or high cost. In this study we implemented a novel design of the stationary dedicated cardiac SPECT combined with multi-pinhole collimators based on the clinical dual-head scanner with low cost. Previous simulation study has demonstrated the feasibility of the design. Accurate geometry calibration was implemented for...
With the rapid development of wireless sensor networks, satellite sensor networks (SSNs) and high-resolution SSNs (HRSSNs) have been proposed and demonstrated to have significant advantages over general networks. SSNs and HRSSNs have been applied in many fields, including national defense, military, national security, environmental monitoring, and traffic management. In addition, high-resolution satellites...
High quality Mn1.56Co0.96Ni0.48O4 films with different layers have been prepared on Pt//Ti/SiO2/Si substrate. Infrared optical properties of the films have been investigated using infrared spectroscopic ellipsometry. The optical constants have been obtained by fitting the measured ellipsometric parameter data with classical infrared model.
Mongolian is a kind of typical agglutinative language. The configuration of Mongolian expresses different grammatical meanings by connecting different affixes. The additional ingredients of agglutinative languages usually have only one meaning, and the connections have rules to follow. As a kind of agglutinative language, Mongolian can infer the part of speech and the semantic information of the stem...
This study investigates students' and teachers' perception of the impact of portfolio assessment on computer assisted audiovisual course in an EFL classroom. This is an action study, where participants (N=101) were students majors English completing their Audiovisual course at Yiwu Industrial and Commercial College, as partial fulfillment for their 3-year degree program. Drawing upon students' questionnaires...
Power systems usually consist of thousands of buses, which make system analysis and redesign a particularly hard problem when proposing modifications in order to improve or modify existing functionality. Decomposition of a large-scale system into interconnected subsystems provides an effective way for the analysis, estimation and control of power systems. In this paper, a novel decomposition method...
As mobile crowdsourcing techniques are steering many smart-city and Internet-of-Things applications, a new challenge of signal source localization problem arises, which is to infer the locations of signal sources based on crowdsourced data. It will benefit real-world applications such as WiFi advisory systems by locating WiFi access points and urban noise monitoring systems by locating noise sources...
The integrated non-reciprocal tunable bandpass filter with a NiZn feritte film deposited via a spin sprayed process is presented. With external in-plane magnetic fields from 100 to 400Oe, the central frequency was tuned from 3.78 to 5.27GHz, with an insertion loss of 1.73 to 3.42dB and an in-band isolation of more than 13 dB, which was attributed to the non-reciprocity characteristics of the magnetostatic...
In this paper, we propose a near field coupling based wireless power transfer (WPT) system with circularly polarized magnetic field. With a pair of orthogonal resonant coils arranged to generate a circularly polarized near field, we show that the power transfer efficiency is largely maintained in case of rotational misalignment. Furthermore, by arranging the coils close to a metal surface, the power...
With new dynamics and uncertainties in today's power grids, traditional fixed-interval State Estimation (SE) may be unable to track the variability and monitor the power grid effectively. This paper presents a new architecture to transfer data and execute SE on demand. A list of situations are summarized to direct the SE-demand generator in system control center. As SCADA and PMU measurements are...
Since the report [1] in 2004 on transparent and flexible thin film transistors (TFTs) using amorphous In-Ga-Zn-O (IGZO), an increasing number of companies [2] have taken part into developing this type of TFTs and have demonstrated various flat panel displays (FPDs), including e-papers, organic light-emitting diodes (OLEDs) and liquid crystal displays (LCDs). Undeniably, IGZO TFTs exhibit excellent...
As crowdsourcing using sensor-enabled smartphones boosted the confluence of human mobility and ambient network information, it opens up more opportunities for many promising crowd-centric application systems. This paper considers a WiFi advisory system, where crowdsourcing technology is used to gather information of wireless networks for understanding wireless network capability better including the...
As crowd-centric applications have attracted a lot of attention, this work exploits the crowdsourcing technologies to collect and share user experience of WiFi hotspots in an urban area. To address the trust issue, we incorporate an endorsement network into the system, where users can endorse others based on the reviews submitted by themselves. With the incentive endorsement network, our system can...
Renewable energy power generation is developing fast in recent years, thereinto wind power generation is one of the most mature and feasible technologies, especially the offshore wind power is the future trend of wind power development. However, the integration of large-scale wind power will bring various challenges and affect the safe operation of power grids. Compared to AC system, multi-terminal...
The wind power collection using DC grid technology has been considered as one of effective solutions for large offshore wind power collection. The paper analyses the technical requirements for collection of large offshore wind farm power using DC grid technology, and studies the typical DC collection grids for offshore wind power equipped with the wind turbine of DC power output type, then builds...
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