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Fei Li - IEEE Xplore Author Profile

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Unsupervised sentence embedding learning excels through positive sample construction and instance-level contrastive learning (ICL). However, this approach can lead to over-compression and dimensional contamination from noisy data augmentation and unconstrained ICL processes. To mitigate these issues, we propose a novel enhancement method, MSSE, which incorporates an Information Compensation Mechan...Show More
Processing data through a quantum classifier is a powerful alternative to traditional machine learning. A quantum classifier consists of a series of parameterized quantum circuits that train known quantum data to approximate classification functions and accurately classify unknown data. Considering the development limitations of quantum computers, this paper proposes a kind of lightweight quantum ...Show More
This research is motivated by the network construction problem studied in [2], [5], [8]–[10]. It has applications in the areas of overlay network construction and wireless coverage of networks. Given a weighted undirected graph and a list of requests of connectivity constraints on some subsets of vertices, the objective is to form connected subgraphs such that all the connectivity constraints are ...Show More
Currently, biomedical event extraction has received considerable attention in various fields, including natural language processing, bioinformatics, and computational biomedicine. This has led to the emergence of numerous machine learning and deep learning models that have been proposed and applied to tackle this complex task. While existing models typically adopt an extraction-based approach, whi...Show More
User clustering presents a significant design challenge when implementing non-orthogonal multiple access (NOMA) in multiple-input multiple-output (MIMO) systems. To fully exploit the potential of power domain multiplexing and achieve better performance of NOMA, users must possess significant variations in their channel gains. Consequently, it becomes necessary to cluster users based on their disti...Show More
Few-shot named entity recognition (NER) exploits limited annotated instances to identify named mentions. Effectively transferring the internal or external resources thus becomes the key to few-shot NER. While the existing prompt tuning methods have shown remarkable few-shot performances, they still fail to make full use of knowledge. In this work, we investigate the integration of rich knowledge t...Show More
Social Virtual Reality (VR) is regarded as one of the most popular VR applications since it transcends geographical barriers, allowing users to interact in simulated environments for various purposes. Despite its promising prospects, there is a growing concern about the harassment issue due to the immersive nature of social VR compared to other online social environments. Existing protections agai...Show More
High frequency characteristics of 220GHz folded waveguide slow wave structure were studied and a 220GHz three-section variable period folded waveguide TWT was designed. Compared with three-section uniform-period folded waveguide TWT and two-section variable-period folded waveguide TWT, three-section variable-period folded waveguide TWT had the highest output power and electronic efficiency.Show More
Guidance of weapon systems relies on sensors to analyze targets signature. Defense weapon systems also need to detect and then identify threats also using sensors. One important class of sensors is millimeter waves radar systems that are very efficient for all weather detection. But such sensors systems are so complex that they need simulation to be tested in a large variety of operational conditi...Show More
Ultrasound has been demonstrated to be an effective approach for noninvasive neurostimulation. Low frequency ultrasound (<1 MHz) is preferable as its low ultrasonic attenuation when passing through the skull. High frequency ultrasound is able to provide reduced size of focal region. However, the performance of stimulation with high frequency ultrasound is not proved yet. This study examines the fe...Show More
The ability to manipulate microparticles or nanoparticles precisely is important for the development of microsystem. Acoustic tweezers are excellent tools for manipulating particles with size approaching or slightly smaller than wavelength. However, manipulation of microparticles with much smaller size requires stronger acoustic confinement and higher intensities than can be provided by these diff...Show More
A W band three-section folded waveguide Traveling Wave Tube was designed and optimized by CST simulation. The design results showed nearly 200 watts output power without self-oscillation. Comparing with two-section folded waveguide, three-section folded waveguide slow wave structure can obtain higher and more stable output power even without BeO attenuation in it. So three-section folded waveguide...Show More
In this paper, a new passive islanding detection method for grid-connected photovoltaic inverters is proposed. The proposed method is based on extracting signatures from the high frequency components of voltage at the point of common coupling (PCC), which occur after an islanding condition. These high frequency components contain signature information capable of identifying the islanding condition...Show More
In this paper, a general and visual analysis method is presented, devoting to the design of high performance PI regulator for PMSM drives. The proposed method is based on multi-objective optimization, which allows fitting several performance requirements simultaneously. The complete stable region is obtained based on D-Partition, which is surrounded by PI parameters. By using the proposed approach...Show More
With the development of military technology, the large scale war, network war and the Group war have gradually become the main form of future wars. This brings a new demand of large scale multi-sensor data fusion and supercomputing capacity for information fusion system. Aiming at the shortcomings of traditional information fusion system, a new information fusion system is designed based on cloud ...Show More
In this paper, we build up a renewable/green energy trading market for users in smart grids. Recently, more and more residential homes are equipped with solar panels to generate and consume renewable green solar energy. Unfortunately, there usually exists a mismatch between the supply and the demand of renewable energy for individual users. Thus, a market in which users can trade surplus green ene...Show More
Green data centers have become more and more popular recently due to their sustainability. The resource management module within a green data center, which is in charge of dispatching jobs and scheduling energy, becomes especially critical since it directly affects a center's profit and sustainability. The thrust of managing a green data center's machine and energy resources lies at the uncertaint...Show More
Extracting adverse drug events (a.k.a. drug-induced diseases or drug side effects) from the raw text has been widely studied in the biomedical area. It is usually assumed that entities of drugs and diseases are given by a separated named entity recognition model. In this paper, we propose a joint model to extract drugs, diseases and adverse drug events simultaneously. In our model, the structured ...Show More
Acoustic trapping is a powerful manipulation technique widely used in the biological and material sciences. However, selective and tunable manipulation of microparticles is still a challenge. Here, we report a spatial selective trapping of microparticles using a quasi-periodic phononic crystal plate (QP-PCP). By employing three groups of different periodical arrays of gratings on a brass plate con...Show More
We theoretically demonstrate a slotted phononic crystals (SPC) can serve as a high sensitivity liquid sensor platform. The sensor mechanism is based on the analysis the transmission spectrums of the SPC filled with different molar concentration liquid mixtures. These transmission peaks are strongly depend both on the liquid sound velocity and on liquid density, which can serve as measure for liqui...Show More
The plight of ethnic medical technology, education, and industry in ethnic minorities was examined, and the combined “industry-education-research” experience of Jiangxi University of Traditional Chinese Medicine was analyzed. Facing key scientific issues and technological demands, the development of an innovative collaborative model for ethnic medical technology, education, and industry was examin...Show More
Compressive sensing(CS) has been exploited for hype-spectral image(HSI) compression in recent years. Though it can greatly reduce the costs of computation and storage, the reconstruction of HSI from a few linear measurements is challenging. The underlying sparsity of HSI is crucial to improve the reconstruction accuracy. However, the sparsity of HSI is unknown in reality and varied with different ...Show More
As the design rule shrinks, detecting smaller key defects of interest is becoming more challenging for wafer inspection tools. A novel Knight™ Design Based Inspection (KDBI™) system was implemented to extend Applied Materials' inspection tools' capability. Using design data, the KDBI™ Recipe Editor helps to expedite the recipe creation process. A CAD database makes it easy to find the array areas ...Show More
Microbubble ultrasound contrast agent (UCA) has been well recognized as a potential noninvasive tool for the blood pressure measurement. A decrease in subharmonic amplitude of 9 to 12 dB has been reported for Levovist, Optison, Definity, Sonazoid, and SonoVue for ambient overpressure values around 180 mmHg. However, a pressure resolution of 3 mmHg is desirable in medical diagnostics, it is still n...Show More
We theoretically and experimentally investigate the acoustic radiation force (ARF) on cylindrical steel particle near subwavelength slits. By using finite-difference-time-domain (FDTD) method combined with momentum-flux tensor, the dependence of the ARF on the frequency, width of slit are analyzed, respectively. It is predicted that the particle near the slit surface could suffer a trapping effect...Show More