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Mild cognitive impairment (MCI) is a transition stage between normal aging and dementia. Brain network has been proven to occupy an important role in the study of differences in Alzheimer's disease (AD) and MCI. However, there is little knowledge about individual metabolic network abnormities which might be sensitive features in the prediction of MCI progression. In this paper, we constructed the...
Depression detection using speech signal is becoming an attractive topic because it is fast, convenient and non-invasive. Many researches aimed at improving depression classification performance. This study investigated application of ensemble learners in depression detection and compared three speaking styles (interview, reading and picture description) in ensembles. A speech dataset collecting from...
In order to resolve the unobservable problem when only the inter-satellite range of the Earth constellation is utilized for autonomous orbit determination, Lagrange satellites related measurements can be introduced, yielding the method of autonomous orbit determination for earth-moon constellation. For such an orbit determination system, after the dynamic model and the observation model are established,...
This paper reports a micromachined accelerometer using a three degree-of-freedom (3-DoF) weakly coupled resonator (WCR) based on the phenomenon of mode localization. When acceleration acts on the proof masses, the stiffness imbalance between the two outer resonators will incur the mode localization and cause the shift of amplitude ratio. The measured amplitude ratio sensitivity of 7,263,30 ppm/g is...
Networked operations troop use communication and shared mental models to share situation awareness in combat. We propose a new networked operations troop situation awareness sharing model, which enables networked operations unit use analyzing current conditions to choose to communicate or share mental models achieve sharing situation awareness. Based on this, we establish a networked operations situation...
Frequency-modulated MEMS resonant sensors have been widely used in a variety of sensing applications. This recently emerging sensing mechanism, based on the mode localization of weakly coupled resonators, provides improved sensitivity of more than two orders of magnitude by selecting eigenstate or amplitude ratio as the output metric. However, the loci veering property of the new readout limits the...
A hybrid approach based on alternative projection method (APM) and differential evolution (DE) algorithm for satellite footprint pattern synthesis of time-modulated arrays (TMAs) is proposed in this paper. Satellite footprint pattern at the center frequency is synthesized by APM firstly, and then sideband level (SBL) is suppressed by DE. To verify the approach, a planar array more than 1500 elements...
In this paper, an X-tree clock distribution topology based on standing wave oscillator is introduced. To increase output amplitude at the loading point and saving chip area, a novel CMOS active inductor is designed and applied to each loading points of the network. The cascoded differential active inductor is 1 nH with Q = 344 at 10 GHz. This makes the two stage, 6.2 mm × 6.2 mm dimensional standing...
The increasing penetration of electric vehicles (EVs) will bring great challenges to the secure and economic operation of distribution networks. On the other hand, coordinated charging of EVs can alleviate the adverse impacts of charging loads and even increase the efficiency of distribution network operation. This paper aims at optimally scheduling the daily charging of EVs and the daily on/off switching...
A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
A volatile organic compounds (VOCs) sensor based on intrinsic Fabry-Perot interferometer (IFPI) coated with polypyrrole thin film was proposed and experimentally demonstrated. The IFPI consists a section of hollow-core fiber (HCF) sandwiched between two single mode fiber. The polypyrrole is formed chemically via interfacial polymerization technique and coated directly onto the fiber. As the isopropanol...
A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
An optical fiber Nickel ions (Ni2+) sensor based on a Mach-Zehnder interferometer (MZI) formed by cascading two coating-functionalized fiber tapers is proposed and experimentally demonstrated. The functional coating is a multi-layer film of chitosan/muli-walled carbon nanotubes (MWCNT)/poly acrylic acid (PAA) formed directly onto the fiber surface via a layer-by-layer assembly technique. As the heavy...
Traditional causal structure learning algorithms rely on having full access to the full feature space throughout the learning process. However, in many real-world applications, all the features cannot be obtained in advance. We propose a causal structure learning algorithm based on streaming feature called CSBS which can effectively apply to the streaming feature space where the feature flow in one...
This paper presents the dynamics analysis of laparoscope arm for Minimally Invasive Surgical Robot(MISR), and the inverse dynamics model of the laparoscope arm is established according to the general equation of multi-body dynamics and Lagrange equations. Complete virtual prototype model of laparoscope arm is established in Adams. The theoretical driving torques/force of the dynamic model are got...
To improve the safety of EV battery replacement stations, grey correlation and grey entropy evaluation models are established based on normalized processing evaluation objects and the ideal object, and the system safety influence degree is evaluated according to different weights evaluation objects in the models. For the battery replacement stations safety evaluation, the safety assessment model is...
In order to improve the electric car battery safety early warning ability and decrease the safe accident of electric vehicle charging, the electric vehicle charging safety factors are analyzed, the security early warning index selection ways and methods are studied, and a security early warning evaluation index system is set, the evaluation method of weight for safety index is discussed. Besides,...
In this paper, we propose an image registration algorithm based on improved SIFT (Scale-Invariant Feature Transform) algorithm and essential matrix estimation based on RANSAC (Random Sample Consensus) and AC-RANSAC (A Contrario RANSAC) algorithm. So that in the 3D reconstruction, we can directly restore the parameters of the camera by using the essential matrix model estimated by image registration...
We study the optimum scheduling of a pushing-based information delivery system, where information is sent from a server to mobile users by using server-initiated pushing actions. Information arrives at the server at random. The server adopts a “hold-then-serve” strategy, where new information is temporarily stored in queue for a later one-time transmission. Based on the current queue status, at any...
Based on a combination of online experimental system and off-line measuring system, the experiment system of the 1064nm laser irradiating the aluminum plate was established. The laser sources were the quasi-continuous-wave(QCW) laser and the continuous-wave(CW) laser. The average power of the QCW laser was from 100W to 1000W, operating at a repetition rate of 400Hz and pulse duration of 200μs. The...
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