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Inspired by potential application in power systems and a fully distributed primal-dual method, we investigate how a novel distributed optimization algorithm can be used to solve the dispath response problem in power systems with a distributed manner, whose main target is to minimize the generation cost of the whole network. The problem we study here can be formulated as a kind of optimization problem,...
A tunable whispering gallery mode (WGM) resonator based on nematic-liquid-crystal-infiltrated silica capillary is presented in this paper. WGM wavelength shift is achieved by exploiting the birefringence effect of liquid crystal triggered by applied electric field.
Osteonecrosis of the femoral head is caused by inadequate blood supply to the affected bone. The bone decay process due to lacking blood supply would be likely to be accompanied by the formation of gas-filled pores. We have introduced diode laser absorption spectroscopy to successfully detect water vapor signals from pores in the femoral heads retrieved from hip replacement operations in 19 patients...
Resource-constrained surveillance tasks represent a promising domain for autonomous robotic systems in a variety of real-world applications. In particular, we consider tasks where the system must maximize the probability of detecting a target while traversing an environment subject to resource constraints that make full coverage infeasible. In order to perform well, accurate knowledge of the underlying...
In this paper, we implemented and validated a workflow modeling approach that is able to model a sequence of procedures to achieve a complex task to enable an AR-based automated task guidance system. We formulated automated task guidance as a decision making problem, based upon the general Partially Observable Markov Decision Processes (POMDP) paradigm as the foundation. Our approach is able to provide...
The objective of this paper is to improve the fatigue life of a contact spring pin in a 126 kV vacuum circuit breaker (VCB). Firstly, the fatigue life of the contact spring pin during the opening or closing operation of the 126kV VCB is analyzed. Secondly, an orthogonal experimental method is used for the improvement of the fatigue life of the contact spring pin, in which three impact factors are...
A set of post arc current measurement system with high precision on multi-break vacuum circuit breakers(VCBs) was designed, and factors affecting the precision were analyzed. The improved shunt in current measurement showed high accuracy and fast response speed, so it could satisfy the demand of the precision. Meanwhile, with the changing of structure, the problems which were caused by surface action...
Different power grid operation mode corresponds with different short-circuit capacity distribution, while different distribution of short-circuit (current) capacity is contradictory to power grid operation performance and equipment tolerance influence consequence. This paper establishes functional relationship between short circuit (current) capacity of power grid and effective switch set and feasible...
In this paper, we use the combination of graph theory and consensus algorithm to realize the formation control of nonholonomic wheeled robots. A novel edge-weight function is designed so that the desired formation-shape can be achieved. In addition, the consensus problem is usually solved on the assumption that the robots are modeled as particle model, but this assumption is not suitable when we are...
As a non-invasive technique of neuromodulation, transcranial magnetic stimulation has become widely used in clinical and scientific applications. The figure-8 coil is the most used coil in transcranial magnetic stimulation, and how to design a suitable figure-8 coil to achieve better stimulation effect is of great value. Analyzing and comparing stimulus depth and focusing parameters of figure-8 coil...
In this paper, a dual-band dipole with pattern configuration, FPC structure antenna is proposed. By controlling the pin diodes on the reflectors, three modes of radiation pattern are generated for 2G and 5G, respectively, and Reconfiguration antenna can be achieved. DC trace and RF trace are highly integrated and easy to combine with electronic products. Results of measurement for return loss, radiation...
This paper takes the isolated bidirectional dual active bridge (DAB) dc-dc converter with triple-phase-shift (TPS) control as the research object. A novel controller design method based on the ant colony optimization (ACO) through time-domain performance feedback is proposed, where a simulation model is required rather than a mathematical one. On this basis, the second order controller for DAB is...
A natural image usually conveys rich semantic content and can be viewed from different angles. Existing image description methods are largely restricted by small sets of biased visual paragraph annotations, and fail to cover rich underlying semantics. In this paper, we investigate a semi-supervised paragraph generative framework that is able to synthesize diverse and semantically coherent paragraph...
Conditional Generative Adversarial Networks (GANs) for cross-domain image-to-image translation have made much progress recently [7, 8, 21, 12, 4, 18]. Depending on the task complexity, thousands to millions of labeled image pairs are needed to train a conditional GAN. However, human labeling is expensive, even impractical, and large quantities of data may not always be available. Inspired by dual...
In this paper, a maximum efficiency extracting technique is presented for endoscopic capsule's Wireless Power Transfer (WPT). Instead of conventional regulators, a DC-DC Bulk LTC3129-1 with Maximum Power Point Control (MPPC) capability is adopted to boost the power conversion efficiency of the WPT receiver (including RF-DC rectifier and DC-DC Converter) up to 60%. Measurements validate that DC-DC...
A compact low phase noise oscillator based on substrate integrated waveguide (SIW) structure is presented. The oscillator employs a third-degree cross-coupled bandpass SIW filter as the frequency stabilization element. Meanwhile, the groupdelay and the complex quality factor (Qsc) are all taken into consideration for the oscillator design, which is more accurate than the traditional method. The measured...
In this paper, we fabricated a hybrid on-chip acoustic and field-effect device to investigate the acoustic carrier transportation in graphene. The device fabrication exploited aluminum nitride (AlN)-based surface micromachining process on a silicon wafer, facilitating an integration of a surface acoustic wave (SAW) delay line and a graphene field-effect transistor (GFET). The SAW device induced an...
In this paper, the zirconia toughened alumina (ZTA) ceramics with different content of zirconia were fabricated. The dielectric relaxation properties were investigated by using thermally stimulated depolarization current (TSDC) method. The observed TSDC peaks were attributed to defect dipole polarization, and the related activation energies were evaluated by a fitting method. The influence of zirconia...
Acoustic wave devices are powerful tools for investigation of nanomaterials. For instance, acoustic waves can induce macroscopic acousto-electric (AE) current in graphene. Typically, LiNbO3 is used for the acoustic wave generation. However, it is relatively inefficient in the tuning of the nanomaterials' conductivity due to its large thickness. As a solution, silicon-based acoustic transducers are...
To improve the accuracy of surface defect detection, an approach of defect inspection based on visual saliency map and Support Vector Machine(SVM) is proposed. Monochrome fabric defect images are taken as examples in this paper. By analyzing the visual saliency maps of these images, the global associated value and the background associated value are extracted as the two features. After being normalized,...
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