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FrFT is a new tool which has a dominant advantage to detect LFM-signal. However, under the multipath environment, the LFM signal is distortion on account of the non-correlation superimposition of the multipath component, which results in performance degradation of the detector based on FrFT. In this paper, a combination of time-reversal focusing and Fractional Fourier Transform algorithm is proposed...
In this paper, the second-order stochastic resonance (SR) system with Levy noise is analyzed, and the improved numerical method is proposed to obtain the output signal sequence after the SR system. Then the matched stochastic resonance (MSR) system is investigated and derived to produce a stable SR phenomenon in Levy noise circumstance. The matched performance is then evaluated which reflected the...
In order to improve the adaptation of quadruped robot for various terrains, the major problem is how to build up the smooth transition algorithm from trotting gait suitable for flat terrain to walking gait suitable for rugged terrain. Firstly, one gait cycle of trotting gait and walking gait are analyzed for finding out all the potential switch points and access points. Secondly, based on analysis...
The design employs direct drive torque motor to achieve a robot single joint with active compliance based on the impedance model. In order to maximize the torque density, transmission transparency and backdrivability, the joint employs a quasi-direct actuator that a single-stage planetary gear is mounted on the motor's rotor. When robot interacts with environments, it's inevitable to change the stiffness...
As a detection signal LFM pulse is widely used in sonar system. FrFT is a new tool which has a dominant advantage to detect LFM-signal. However, under the multipath environment, the LFM signal is distortion on account of the noncorrelation superimposition of the multipath component, which results in performance degradation of the detector based on FrFT. In this paper, an improved algorithm based on...
Photothermal manipulation has been proven as an effective strategy to trap and rotate mesoscopic particles, whose features are scales ranging from tens of nanometers to hundreds of micrometers. In particular, the extraordinary ability of highly-efficient non-contact photothermal manipulation based on fiber waveguide has stimulated a number of breakthroughs in lab-on-a-chip techniques and research...
Mid-Infrared (mid-IR) photonic using barium titanate (BaTiO3) thin films are demonstrated through the complementary metal-oxide-semiconductor (CMOS) process. The BaTiO3 thin films have broad infrared transmittance between λ = 2.5 μm to λ = 7 um. Our waveguides show a fundamental mode over broad mid-IR regime. With the broad mid-IR transparency and electro-optic (E-O) property, our BaTiO3 platform...
Service identification meets with new challenges with overwhelming rise of categories and numbers of services in big data scenarios. Most of the current service identification approaches have paid little attention to the granularity of indicator for service identification, neither do they provide with any trustworthy monitoring mechanism during the process of service identification. To address the...
According to the serious challenge of underwater acoustic detection under low signal-noise-ratio (SNR) conditions, the stochastic resonance (SR) would be likely applied to enhance the detection performance of underwater weak received signals. However, the way of adjusting system nonlinearity, noise intensity or signal structure to match arbitrary noisy signal is still a serious problem which can be...
In this paper, a grid-based matching multiple sources localization (MUSOL) method is proposed and a spatial spectrum about multiple sources positions is obtained. The spatial spectrum obtained by MUSOL can provide a visualization results about the possible region of the multiple sources positions only if the AOA measurements have the right data association. This property permit the MUSOL not to perform...
This paper focuses on the source localization based on structured total least squares (STLS) method with hybrid TDOA-AOA measurements. First, A pseudolinear system of equations is constructed from the TDOA-AOA measurements. Considering the matrix and vector in the constructed pseudolinear system are both contaminated by the measurement noise, the STLS method which utilizes the structure of the matrix...
The presence of network and competitive effects result in reluctance to engage in information sharing. To study the influence of the above effect on the hospitals HIE adoption decisions, we analyze the effect of heterogeneous health care quality and price between two hospitals on new market equilibrium using a modified Hotelling framework. Our results provide decision support for hospital adoption...
The wafer quality metrology delay is a very common phenomenon in the semiconductor manufacturing processes. Furthermore, the metrology delay is usually stochastic and time-varying, which will affect the stability and control performance of the control system. In this paper, a new kind of Run-to-Run (R2R) controller based on both Takagi-Sugeno (T-S) fuzzy model and Extended State Observer (ESO) is...
We consider three kinds of minimum single source shortest path tree expansion problems. Given an undirected connected graph G = (V, E; w, c, b; s) with n vertexes, m edges and a positive constant H, w(e) is the length of edge e, c(e) is the capacity of edge e, b(e) is the unit cost to increase the capacity of edge e, H is a given capacity restriction value and s is a fixed vertex of G. For every edge...
This paper analyzes the fatigue monitoring parameter selection and long-distance wireless transmission in deep water drilling riser fatigue monitoring technologies, and designs a deep-sea riser fatigue monitoring system based on MCU+DDS structure. This monitoring system can monitor riser Vortex induced vibration, riser stress and strain and current velocity of seawater in real time. This system can...
Combining energy storage system (ESS) with wind farm is an effective way to increase the penetration rate of wind power. And sizing ESS is an important part in nowadays wind farm planning. In this paper, a method for determining the optimal capacity of ESS integrated with wind power generator to meet the requirements of grid integration is presented. With the proposed method, the necessary capacity...
Due to the complex species, the changing dimensions and 2D nesting structure of mathematical formula symbols, the accuracy of symbol segmentation still cannot meet the actual needs. Projection is only suitable for simple mathematical formula without subscript and hierarchy. This paper presents a kind of improved algorithm based on the connected domain for symbol segmentation of mathematical formula...
For developing countries, electric power has been playing a more and more important role in national economy. In recent years, with the rapid development of economy in Sichuan province of China, electric power demand has entered a high-speed development period. For power grid companies, studying on the development trend of electricity is the key to expand electricity market and promote sustainable...
Depicting the operation of protection coordination in a scientific way is one of the key points to objectively evaluate characteristic of voltage sag. In order to evaluate the operation of distance protection on voltage sag characteristic in meshed network, a novel voltage sag stochastic evaluation method is proposed. According to the operation time of distance protection and modification of node...
This paper introduces the open concepts into the cause Visual Basic Programing practice teaching, and builds a practice teaching system based on hierarchical project decomposition and design projects for professional practical teaching. The students' professional application capability is developed by means of professional practical teaching. The students' self-study capability is improved by adopting...
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