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The intelligent vehicle gives more convenience to our lives and safety is the foundation for intelligent vehicle application. This paper compares safety of automated individual vehicle with and without cooperation function, platooned vehicles considering the rear end collision frequency and severity on freeway. In platooned vehicles, we also compared different driving modes by changing the inter vehicle...
Aim at large aircraft power supply which use variable frequency ac power supply and has complex power system structure, the parameters test system needs to store the large amount of data, puts forward a data storage strategy based on the system time; To meet the testing requirements of voltage phase difference, three-phase voltage unbalance and other characteristic parameters, the article designs...
In this paper, a multi-degree open-circuit faults diagnostic algorithm, for improving condition monitoring ability of spacecraft solar cell system, has been proposed. This algorithm combines the output parameter, output voltage, output current and the impedance of solar cell system under low frequency domain. The algorithm can be used to diagnose the degree of faults quantitively and quickly. The...
In this paper, a Bayesian method with a hierarchical sparsity enforcing prior model for Dual-Tree Complex Wavelet Transform (DT-CWT) coefficients is proposed. This model is used for X-ray Computed Tomography (CT) image reconstruction. A generalized Student-t distributed prior model is used to enforce the sparse structure of the DT-CWT coefficient of the image. The joint Maximum A Posterior algorithm...
Network virtualization brings remarkable evolution for networking, and it breaks through the resource boundaries originated from the physical network devices. Software-defined network (SDN), on the other hand, makes operational management more flexible for virtual network. DHCP is one of the most common protocols in the network. However, it becomes unsafe if misused by hackers. In this paper, we develop...
The high temperature superconducting (HTS) cable has a wide application prospect in the future power grid because of its low loss, large capacity and friendly environment. Since without AC loss, the HTS DC cable has a longer cooling distance, and is more suitable for large capacity and long distance transmission. In the near future, with large-scale application of renewable energy, HTS DC cable is...
The rapid advances of transportation infrastructure have led to a dramatic increase in the demand for smart systems capable of monitoring traffic and street safety. Fundamental to these applications are a community-based evaluation platform and benchmark for object detection and multi-object tracking. To this end, we organize the AVSS2017 Challenge on Advanced Traffic Monitoring, in conjunction with...
Current auxiliary power unit (APU) system in aircraft is heavy, noisy and inefficient, so a new form of power source to replace the engine mounted generator technologies is in demand. As a green power source, fuel cell is discussed in this paper to study the feasibility of the system as an APU. This paper investigates different fuel cell applications, and qualitative analysis shows that proton exchange...
Due to the fact that the cables in aircraft power system are complex, of large number branch points and hard to detect, this paper proposes a fault diagnosis method for Y shaped cable network combining the optimized search algorithm with Spread Spectrum Time Domain Reflectometry (SSTDR) by using the relationship between the reflection coefficient of the faulty branch and the detection port, based...
The paper incorporates cable fault detection and location function to conventional SSPC (Solid State Power Controllers), which enhances the ability of fault diagnosis while improving fault coverage rate of the system, as well as realizing the precise positioning of cable fault distance. Aiming at the problem of relatively low cable fault detection rate of the cable positioning device, the concept...
This paper studies the main feeder wiring strategy of the hollow cable in aircrafts. The impedance characteristics of hollow cables of variable frequency are studied firstly. Then the hollow cable is applied to the typical wiring strategy of the main feeder in the aircraft. The impedance and carrying capacity of hollow cable are respectively compared with those of the traditional circular cable. Comparisons...
Surgical instrument sorting is a repetitive work with a high risk of infection, which requires medical staffs to classify them after cleaning. Currently, the surgical instrument sorting is usually accomplished by medical staffs' manual operation. It is a time costing work, which may cause operators' fatigue even classification errors. Meanwhile, surgical instruments are relatively sharp and often...
According to the recent research, the analysis of AC arc fault is based on the constant frequency system. The characteristics extracted in the constant frequency system such as the variation rate of current, the ratio of “flat shoulder” and the harmonic change with frequency. Therefore, it cannot apply to the variable frequency system. In this paper, the AC arc experiment platform is built, and the...
Efficient content retrieval is crucial for Named Data Delay Tolerant Networking (NDDTN). Previous studies have shown that using social properties reasonably can improve availability of forwarding data packets, reduce overhead and delay. In this paper, a forwarding strategy, called RIF based on Region of Interest (ROI), is proposed and put forward for NDDTN. RIF computes cumulative visiting time and...
A non-probabilistic structural damage identification algorithm based on static strain energy (SSE) is presented in this paper. In order to overcome the shortcoming of traditional uncertainty quantification methods in modeling nondeterministic parameters, this paper adopts the non-probabilistic interval analysis approach to deal with the system uncertainties. Once the interval bounds of structural...
Cost-sensitive multi-class fuzzy decision-theoretic rough set (MC_FDTRS) is proposed by considering cost sensitivity in practical fault diagnosis process. MC_FDTRS generalizes indiscernibility relation of multi-class decision-theoretic rough set to Gaussian kernel based fuzzy equivalence relation, and then it can deal with numerical data directly without discretization. MC_FDTRS introduces cost matrix...
In order to solve the problem of low accuracy of flaws detection in non-destructive testing, a data-fusion method based on RBF neural network and evidential reasoning (ER) rule is studied. Firstly, a data-fusion model is proposed which contains two parts. Secondly, the first part RBF neural network is used to fuse the feature layer, and its output is normalized as the basic probability assignment...
Designing a tightly coupled antipodal Vivaldi antenna (TC-AVA) array is proposed in this paper. With increased capacitive coupling effects of the overlapped end portions of adjacent flare-arms of AVA elements, the bandwidth of the TC-AVA array is effectively broadened by decreasing the lowest frequency about 69.5% compared with the single isolated element. The simulated results show that the proposed...
Due to the limited data variables of the spacecraft solar array, a comparison was made between the maximum power point voltage and current data of the solar array in the case of normal, short circuit, and irradiation failure. The maximum power point voltage and current data are used as the description of faults as the basis for fault diagnosis. Because of the cross-over phenomenon of the fault samples,...
Brain-derived neurotrophic factor (BDNF) has been shown to play an important role in numerous processes of functional and structural synaptic plasticity in the mammalian central nervous system. In this work, we report a novel immune microelectrode array (MEA) for electrochemical detection of BDNF without labeling step. The chitosan-thionine-multi-walled carbon nanotubes (CS-THI-MWCNTs) composite films...
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