Jinjun Liu
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View article: Optimized Design of the Generalized Bilinear Transformation for Discretizing Analog Systems
Optimized Design of the Generalized Bilinear Transformation for Discretizing Analog Systems Open
A common approach to digital system design involves transforming a continuous-time (s-domain) transfer function into the discrete-time (z-domain) using methods such as Euler or Tustin. These transformations are shown to be specific cases o…
View article: Noncoronary Sinus Pivot Implantation (NCPI) Strategy for Transcatheter Aortic Valve Replacement With Self‐Expanding Valve in Pure Native Aortic Regurgitation: A Multicenter, Registry Study From the CCA Database‐NTCVR
Noncoronary Sinus Pivot Implantation (NCPI) Strategy for Transcatheter Aortic Valve Replacement With Self‐Expanding Valve in Pure Native Aortic Regurgitation: A Multicenter, Registry Study From the CCA Database‐NTCVR Open
Background Transcatheter aortic valve replacement (TAVR) for pure native aortic regurgitation (PNAR) remains challenging. While the noncoronary sinus pivot implantation (NCPI) strategy showed promise with VitaFlow valve, its efficacy with …
View article: Optimizing pathophysiology instruction in dental school: examination paper analysis and strategic reflections
Optimizing pathophysiology instruction in dental school: examination paper analysis and strategic reflections Open
View article: Risk assessment and physical hazard detection in elderly living environments using multi-scale infrared and visible imagery fusion
Risk assessment and physical hazard detection in elderly living environments using multi-scale infrared and visible imagery fusion Open
View article: Millimeter-wave radar based sleep posture transition dataset: SPT
Millimeter-wave radar based sleep posture transition dataset: SPT Open
In recent years, millimeter-wave radar technology has been widely used for non-invasive recognition and tracking of sleep postures due to its advantages of high accuracy, contactless operation, and ability to penetrate clothing. In order t…
View article: Integration of a “cardiovascular system” curriculum into an eight-year medical education program: exploration and the experience in China
Integration of a “cardiovascular system” curriculum into an eight-year medical education program: exploration and the experience in China Open
Objectives The traditional, subject-based medical teaching mode has gradually transitioned to a system-based integration mode. This study aims to provide the experience of design and implementation of a pilot program to integrate a “cardio…
View article: Low-Loss Soft Magnetic Materials and Their Application in Power Conversion: Progress and Perspective
Low-Loss Soft Magnetic Materials and Their Application in Power Conversion: Progress and Perspective Open
Amorphous and nanocrystalline alloys, as novel soft magnetic materials, can enable high efficiency in a wide range of power conversion techniques. Their wide application requires a thorough understanding of the fundamental material mechani…
View article: Addressing Hybrid Confounder Issue for Causal Session-Based Recommendation
Addressing Hybrid Confounder Issue for Causal Session-Based Recommendation Open
In the field of session-based recommendation, users’ interaction behaviors are affected by both popularity and surrounding environmental factors, such as item popularity, season, or salary, and so on. Utilizing causal learning techniques t…
View article: Impact of Viscoelasticity on Sand-Carrying Ability of Viscous Slickwater and Its Sand-Carrying Threshold in Hydraulic Fractures
Impact of Viscoelasticity on Sand-Carrying Ability of Viscous Slickwater and Its Sand-Carrying Threshold in Hydraulic Fractures Open
Viscous slickwater has a higher viscosity and better sand-carrying ability than conventional slickwater at the same concentration. At a concentration of 0.4 wt.%, the viscosity of the viscous slickwater is 4.7 times that of the conventiona…
View article: A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters
A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters Open
Grid-forming inverters, which are represented by droop control and virtual synchronous generator control, have been widely studied and applied because of their excellent grid-supporting ability and smooth off-grid switching. When a grid-fo…
View article: Improving Image Stitching Effect using Super-Resolution Technique
Improving Image Stitching Effect using Super-Resolution Technique Open
This paper aims to present a novel methodology that merges image stitching with super-resolution techniques, enabling the creation of a high-resolution panoramic image from several low-resolution inputs. The proposed approach comprehensive…
View article: Sentiment Classification of Social Network Text Based on AT-BiLSTM Model in a Big Data Environment
Sentiment Classification of Social Network Text Based on AT-BiLSTM Model in a Big Data Environment Open
To tackle the challenge of ineffective sentiment prediction using current sentiment classification methods, this paper introduces a method social network text sentiment classification. The method leverages a bidirectional short and long-te…
View article: An adaptive synchronous rectifier driving strategy for unregulated LLC resonant converter
An adaptive synchronous rectifier driving strategy for unregulated LLC resonant converter Open
LLC resonant converters are widely adopted in many different industrial applications due to their high efficiency operation. To further improve LLC resonant converters' efficiency, the secondary unregulated diode rectifier is replaced by t…
View article: Dynamic Performance Improvement of a Single-Phase VSI with Digital Implementation of an On-Line Optimal Trajectory Control Algorithm
Dynamic Performance Improvement of a Single-Phase VSI with Digital Implementation of an On-Line Optimal Trajectory Control Algorithm Open
A single-phase voltage source inverter (VSI) still suffers from a long settling time and significant voltage overshoot/undershoot under the abrupt step-change of load current. This article analyzes the comprehensive large-signal dynamic pr…
View article: The Co-Movements Analysis of Military Expenditure Based on Complex Network Approach
The Co-Movements Analysis of Military Expenditure Based on Complex Network Approach Open
Because of the importance of military expenditure to the security of nation, it has been a crucial and hot point in military research for decades. In the paper, we develop co-movement network of international military expenditure with the …
View article: Small‐signal modelling considering internal perturbations for modular multilevel converters
Small‐signal modelling considering internal perturbations for modular multilevel converters Open
Small‐signal modelling of modular multilevel converters (MMC) has drawn lots of attention recently. Existing research mainly studies MMC terminal impedances by injecting corresponding AC‐side and DC‐side external small‐signal perturbations…
View article: ROTATIONAL CLOSURE IN LASER-COOLING NONLINEAR MOLECULES
ROTATIONAL CLOSURE IN LASER-COOLING NONLINEAR MOLECULES Open
View article: VIBRONIC ANALYSIS OF MOLECULES WITH QUASI-DEGENERATE ELECTRONIC STATES
VIBRONIC ANALYSIS OF MOLECULES WITH QUASI-DEGENERATE ELECTRONIC STATES Open
View article: Experimental Research of Compound Monitoring on Multiple Temporary Blocking Refracturing for Long-Section Horizontal Wells
Experimental Research of Compound Monitoring on Multiple Temporary Blocking Refracturing for Long-Section Horizontal Wells Open
As an important energy replacement block in China, the tight conglomerate oilfields in the Mahu area are difficult to develop and are characterized by strong heterogeneity, large horizontal stress differences, and undeveloped natural fract…
View article: Classification Method of Voltage Sag Sources Based on Sequential Trajectory Feature Learning Algorithm
Classification Method of Voltage Sag Sources Based on Sequential Trajectory Feature Learning Algorithm Open
The classification of voltage sag sources is essential for the establishment of controlling scheme and reasonable division of responsibilities in voltage sag-associated accidents. Existing methods for classifying voltage sag sources usuall…
View article: A Mode Switching-Based Decentralized Secondary Control for Microgrids With Hybrid Droop and Master-Slave Structure
A Mode Switching-Based Decentralized Secondary Control for Microgrids With Hybrid Droop and Master-Slave Structure Open
The hybrid droop and master-slave structure studied in existing work complements the advantages of droop control and master-slave control, at the cost of frequency and voltage deviations in microgrids. To eliminate these deviations and mai…
View article: Automatic Test Method of Typical Sensitive Equipment for Voltage Sag Withstand Characteristics Analysis
Automatic Test Method of Typical Sensitive Equipment for Voltage Sag Withstand Characteristics Analysis Open
As production and life require more and more high-end and precise power equipment, high-quality electrical energy becomes the basis for the operation of these equipment. The impact of voltage sags on these devices has also increased. The q…
View article: Learning Sequential General Pattern and Dependency via Hybrid Neural Model for Session-Based Recommendation
Learning Sequential General Pattern and Dependency via Hybrid Neural Model for Session-Based Recommendation Open
Recent study shows that recommendation system not only relys on user’s static preference, but also dynamic preference. Consequently, it leads to the emergence of session-based recommendation. With the development of recurrent neural networ…
View article: Vocs Emission Characteristics of Crumb Rubber Modified Bitumen and its Inhibition by Using Montmorillonite Nanoclay
Vocs Emission Characteristics of Crumb Rubber Modified Bitumen and its Inhibition by Using Montmorillonite Nanoclay Open
View article: Guest Editorial Special Issue on Design and Testing Methods of Power Electronics Components and Circuits
Guest Editorial Special Issue on Design and Testing Methods of Power Electronics Components and Circuits Open
Safe and reliable operation is always a crucial consideration in many important applications of power electronics. Nowadays, the working conditions or mission profiles of power electronics components/systems are becoming intensive and comp…
View article: CBPWM and SVPWM equivalent relationship on single‐phase NPC <b> <i>N</i> </b> ‐level inverters with arbitrary sequence
CBPWM and SVPWM equivalent relationship on single‐phase NPC <b> <i>N</i> </b> ‐level inverters with arbitrary sequence Open
Single‐phase multilevel neutral‐point‐clamped (NPC) voltage source inverter has been widely applied in AC traction drive system, the carrier‐based pulse width modulation (CBPWM) method and the space vector pulse width modulation (SVPWM) me…
View article: PEDG 2021
PEDG 2021 Open
PELS) and organized by the PELS Technical Committee on Sustainable Energy Systems, will provide a venue for experts to present the results of their cutting-edge research in power electronics and distributed generation (DG) systems.PEDG 202…
View article: Research on the Equivalent Virtual Space Vector Modulation Output of Diode Clamped N-level Converter under Multi-Modulation Carrier Modulation
Research on the Equivalent Virtual Space Vector Modulation Output of Diode Clamped N-level Converter under Multi-Modulation Carrier Modulation Open
Diode-clamped multi-level converters have DC-side capacitors in series, which will lead to the unbalance of DC-side capacitor voltage, the distortion of the output waveform, the increase of total harmonic distortion (THD), and even the dam…
View article: A Small-AC-Signal Injection-Based Decentralized Secondary Frequency Control for Droop-Controlled Islanded Microgrids
A Small-AC-Signal Injection-Based Decentralized Secondary Frequency Control for Droop-Controlled Islanded Microgrids Open
In an islanded microgrid composed of droop-controlled parallel inverters, the system frequency endures deviations as the load changes. To compensate for frequency deviation without involving communication infrastructures among distributed …
View article: Polarized lung inflammation and Tie2/angiopoietin-mediated endothelial dysfunction during severe Orientia tsutsugamushi infection
Polarized lung inflammation and Tie2/angiopoietin-mediated endothelial dysfunction during severe Orientia tsutsugamushi infection Open
Orientia tsutsugamushi infection can cause acute lung injury and high mortality in humans; however, the underlying mechanisms are unclear. Here, we tested a hypothesis that dysregulated pulmonary inflammation and Tie2-mediated endothelial …