Search results for: Xinlei Chen

Items from 1 to 20 out of 58 results

article

Risk Factors and Outcomes Associated With the Development of Persistent Acute Kidney Injury in Non‐Renal Solid Organ Transplant Recipients: Systematic Review and Meta‐Analysis

Ivan E. Saraiva, Natsumi Hamahata, Ankit Sakhuja, Xinlei Chen, more

Clinical Transplantation > 38 > 9 > n/a - n/a

Persistent acute kidney injury (pAKI), compared with acute kidney injury (AKI) that resolves in <72 h, is associated with worse prognosis in critically ill patients. Definitions and prognosis of pAKI are not well characterized in solid organ transplant patients. Our aims were to investigate (a) definitions and incidence of pAKI; (b) association with clinical outcomes; and (c) risk factors for pAKI...

article

Materials for pulpotomy in immature permanent teeth: a systematic review and meta-analysis

Yuan Chen, Xinlei Chen, Yali Zhang, Fangjie Zhou, more

BMC Oral Health > 2019 > 19 > 1 > 1-9

Background Pulpotomy is one of the most widely used methods in preserving vital pulp in teeth, which is of great significance in achieving continue root formation in immature permanent teeth suffering from dental caries or trauma. The aim of this meta-analysis and systemic review is to synthesize the available evidences to compare different pulpotomy dressing agents for pulpotomy treatment in immature...

article

Clinical evidence of photobiomodulation therapy (PBMT) on implant stability and success: a systematic review and meta-analysis

Yuan Chen, Caojie Liu, Xinlei Chen, Anchun Mo

BMC Oral Health > 2019 > 19 > 1 > 1-10

Background Photobiomodulation therapy (PBMT), a type of light therapy that uses the concept of photobiomodulation, is developed to promote bone healing. Clinical studies have been conducted to assess the influence of PBMT on dental implant stability and success rate. This is the first systematic review and meta-analysis to assess the effect of PBMT and methodological quality of these studies on implants...

article

Correction to: Discovery and preclinical characterization of the antagonist anti-PD-L1 monoclonal antibody LY3300054

Yiwen Li, Carmine Carpenito, George Wang, David Surguladze, more

Journal for ImmunoTherapy of Cancer > 2018 > 6 > 1 > 1-1

Unfortunately, after publication of this article [1], it was noticed that corrections to the legends of Figs. 1 and 2 were not correctly incorporated. The correct legends can be seen below.

article

Discovery and preclinical characterization of the antagonist anti-PD-L1 monoclonal antibody LY3300054

Yiwen Li, Carmine Carpenito, George Wang, David Surguladze, more

Journal for ImmunoTherapy of Cancer > 2018 > 6 > 1 > 1-14

Background Modulation of the PD-1/PD-L1 axis through antagonist antibodies that block either receptor or ligand has been shown to reinvigorate the function of tumor-specific T cells and unleash potent anti-tumor immunity, leading to durable objective responses in a subset of patients across multiple tumor types. Results Here we describe the discovery and preclinical characterization of LY3300054,...

chapter

Spatial Memory for Context Reasoning in Object Detection

Xinlei Chen, Abhinav Gupta

2017 IEEE International Conference on Computer Vision (ICCV) > 4106 - 4116

2017 IEEE International Conference on Computer Vision (ICCV)

Modeling instance-level context and object-object relationships is extremely challenging. It requires reasoning about bounding boxes of different classes, locations etc. Above all, instance-level spatial reasoning inherently requires modeling conditional distributions on previous detections. Unfortunately, our current object detection systems do not have any memory to remember what to condition on!...

article

Impact of Selfishness in Device-to-Device Communication Underlying Cellular Networks

Chuhan Gao, Haoming Zhang, Xinlei Chen, Yong Li, more

IEEE Transactions on Vehicular Technology > 2017 > 66 > 10 > 9338 - 9349

In a device-to-device (D2D) communication underlying cellular network, a user equipment is desired to operate cooperatively and unselfishly to transmit data as relays. However, most users more or less behave in a selfish way, which makes user selfishness a key factor that affects the performance of the whole communication system. We focus on the impact of user selfishness on D2D communications. First,...

chapter

A broadband dual-polarized magneto-electric dipole antenna

Ying Guo, Changqing Gu, Junjie Zhu, Xinlei Chen, more

2017 International Applied Computational Electromagnetics Society Symposium (ACES) > 1 - 2

2017 International Applied Computational Electromagnetics Society Symposium - China (ACES)

A novel wideband dual-polarized magneto-electric dipole unidirectional antenna is proposed in this paper. The antenna is composed of dual-layer magneto-electric (ME)-dipole and two Γ-shaped probes. Its two ports both achieve a common impedance bandwidth of 91.6%(SWR<2). The antenna has excellent performance in isolation, which is more than 15dB, and a high front-to-back ration more than 14.8dB...

chapter

Tunneling of spoof surface plasmon polaritons through effective epsilon-near-zero material

Yunhe Sun, Zhuo Li, Hengyi Sun, Xinlei Chen, more

2017 International Applied Computational Electromagnetics Society Symposium (ACES) > 1 - 2

2017 International Applied Computational Electromagnetics Society Symposium - China (ACES)

In this paper, squeezing and tunneling of spoof surface plasmon polaritons (SSPPs) are realized by introducing an effective epsilon-near-zero (ENZ) material between two plasmonic waveguides constructed from dielectric filled rectangular waveguide etched with deep sub-wavelength periodical transverse slots on the upper wall. This simple design holds great promise in significantly increasing the propagation...

article

Efficient technique for broadband monostatic RCS using the characteristic basis function method with polynomial interpolation

Xinlei Chen, Chao Fei, Changqing Gu, Raj Mittra

Electronics Letters > 2017 > 53 > 14 > 956 - 958

Previous research on the characteristic basis function method (CBFM) has shown that the use of the ultra-wide band CBFM can efficiently solve the problem of computing the broadband monostatic radar cross-section (RCS) of a target by reducing the size of the associated impedance matrix and avoiding the repeated generation of the macro base functions. However, it is still necessary to repeatedly construct...

chapter

Adaptive generation of excitation-independent characteristic basis functions

Xinlei Chen, Chaningqing Gu, Raj Mittra

2017 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) > 29 - 30

2017 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)

The Characteristic Basis Function Method (CBFM) has been widely used in recent years to solve a variety of electromagnetic scattering problems because it offers a way to direct-solve large problems without the use of iteration, enabling it to not only handle multiple excitation (r.h.s.) problems in an efficient manner, but to also bypass the issues of ill-conditioning as well as generation of preconditioners...

chapter

Poster Abstract: Hybrid and Adaptive Drone Identification through Motion Actuation and Vision Feature Matching

Carlos Ruiz, Xinlei Chen, Pei Zhang

2017 16th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN) > 327 - 328

2017 16th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN)

Unmanned aerial vehicle (UAV) swarms provide situation awareness in potential life-threatening tasks such as emergency response, search and rescue, etc. However, most of these scenarios take place in GPS-denied environments, where accurately localizing each UAV is challenging. Heterogeneous UAV swarms, in which only a subset of the drones carry cameras, face the additional challenge of identifying...

chapter

Poster Abstract: E-Loc: Indoor Localization through Building Electric Wiring

Tian Zhou, Yue Zhang, Xinlei Chen, Pei Zhang, more

2017 16th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN) > 311 - 312

2017 16th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN)

E-loc is an indoor localization system, which, through using existing indoor electric wiring, detects occupants' location. While many indoor localization technologies require intensive infrastructural supports, E-loc obtain locations by injecting a signal into the protected earth line of existing residential power network. Caused by human body inside a room, the electromagnetic character changes can...

article

Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide

Liangliang Liu, Zhuo Li, Bingzheng Xu, Changqing Gu, more

IEEE Transactions on Microwave Theory and Techniques > 2017 > 65 > 6 > 2008 - 2018

Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit the practical applications of surface plasmonic waveguides. In this paper, we introduce the concept of dielectric spoof SPs (SSPs) and show that subwavelength high-contrast gratings (HCGs) offer a route to effectively suppress the losses and hence...

article

Tunable Spoof Surface Plasmons Bulleye Antenna

Zhuo Li, Chen Chen, Liangliang Liu, Jia Xu, more

Plasmonics > 2018 > 13 > 2 > 697-703

A tunable spoof surface plasmons antenna using sinusoidally modulated corrugated reactance surface based on a bulleye structure is proposed in this paper. The designed antenna is made of concentric metallic grooves etched on a metal plate, the depth of which is of sinusoidal periodic variation in the radial direction. This makes it possible that highly confined spoof surface plasmons along corrugated...

chapter

SPACA-MLFACA algorithm for fast solution of electromagnetic scattering problems

Xinlei Chen, Chao Fei, Yang Zhang, Zhuo Li, more

2016 International Symposium on Antennas and Propagation (ISAP) > 164 - 165

2016 International Symposium on Antennas and Propagation (ISAP)

This paper presents a fast solution of electromagnetic scattering from perfect electric conductors by using a sparfled adaptive cross approximation-multilevel fast adaptive cross approximation (SPACA-MLFACA) algorithm. In the new method, the conventional SPACA and MLFACA is used to deal with the interactions between well-separated blocks with relative small and large size, respectively. As a result,...

article

Effect of environmental conditions on the sorption of uranium on Fe3O4@MnO2 hollow spheres

Jian Zhang, Zhiqiang Guo, Yuan Li, Shuhao Pan, more

Journal of Molecular Liquids > 2016 > 223 > C > 534-540

Herein, the hydrothermal method was adopted to synthesize Fe₃O₄@MnO₂ hollow spheres for the removal of U(VI) from aqueous solution. The effects of contact time, pH, ionic strength, solid content and temperature were investigated by using a batch technique. The sorption of U(VI) was dependent on ionic strength at pH<7, suggesting that electrostatic interaction and/or outer-sphere surface complexation...

article

Accelerated Direct Solution of Electromagnetic Scattering via Characteristic Basis Function Method With Sherman-Morrison-Woodbury Formula-Based Algorithm

Xinlei Chen, Changqing Gu, Zhuo Li, Zhenyi Niu

IEEE Transactions on Antennas and Propagation > 2016 > 64 > 10 > 4482 - 4486

The characteristic basis function method has been proposed to accelerate the direct solution of the method of moments by reducing the number of unknowns. However, with the increase in the target size, the reduced matrix will still become too large to directly solve and store. In this communication, the algorithm based on the Sherman-Morrison-Woodbury (SMW) formula is employed to address this problem...

chapter

Realization of high-efficiency anomalous reflection using phase gradient metasurface at UHF

Hengyi Sun, Zhuo Li, Xinlei Chen, Liangliang Liu, more

2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) > 435 - 437

2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)

In this paper, a phase-gradient metasurface which consists of 7 arcuate cross-shaped metal-medium-metal units with different geometries is designed to realize anomalous reflection at 3GHz with 99% reflection efficiency of both x-polarized and y-polarized waves. The simulation results on near electric field distributions show excellent agreement of the anomalous reflection angle with theoretical analysis...

chapter

Adaptively generating the multiple-scattering characteristic basis functions

Xinlei Chen, Chao Fei, Hengyi Sun, Zhuo Li, more

2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) > 867 - 868

2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)

The order of the characteristic basis functions (CBFs) has an important influence on efficiency and accuracy of the multiple-scattering (MS) characteristic basis functions method (CBFM). When the object under analysis is divided into many blocks, two or three order CBFs may be enough to obtain accurate results. However, if the number of blocks is small, more high order of the CBFs may be required...

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METHOD OF MOMENTS (MOM) (7)
APPROXIMATION METHODS (6)
METHOD OF MOMENTS (6)
APPROXIMATION ALGORITHMS (5)
ANTENNAS (4)
ELECTROMAGNETIC SCATTERING (4)
IMPEDANCE (4)
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MATHEMATICAL MODEL (3)
NEURONAL APOPTOSIS (3)
SPARSE MATRICES (3)
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VECTORS (3)
ACCELERATION (2)
ACCURACY (2)
ADAPTIVE CROSS APPROXIMATION (ACA) (2)
ALGORITHM DESIGN AND ANALYSIS (2)
CELL CYCLE (2)
DIPOLE ANTENNAS (2)
EQUATIONS (2)
FAST ADAPTIVE CROSS SAMPLING (FACS) (2)
FREQUENCY DIVISION MULTIPLEXING (2)
OBJECT DETECTION (2)
OPTICAL SURFACE WAVES (2)
OPTICAL WAVEGUIDES (2)
PLASMONS (2)
PROLIFERATION (2)
RHESUS MONKEY (2)
RUNGE-KUTTA METHODS (2)
RUNGE-KUTTA MULTIRESOLUTION TIME-DOMAIN SCHEME (2)
SINGULAR VALUE DECOMPOSITION (2)
TIME DOMAIN ANALYSIS (2)
TIME-DOMAIN ANALYSIS (2)
Γ-SHAPEDPROBE (1)
AA98 (1)
ACA (1)
ACA-CBFM (1)
ACA-SVD (1)
ACUTE KIDNEY INJURY (1)
ADAPTIVE CROSS APPROXIMATION-SINGULAR VALUE DECOMPOSITION (1)
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BATTERIES (1)
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BROADBAND MONOSTATIC RADAR CROSS-SECTION (1)
BROADBAND MONOSTATIC RCS (1)
BUFFER STORAGE (1)
BUILDINGS (1)
BULLEYE STRUCTURE (1)
CAMERAS (1)
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CBFM (1)
CCT8 (1)
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INFONA - science communication portal

Search results for: Xinlei Chen

Risk Factors and Outcomes Associated With the Development of Persistent Acute Kidney Injury in Non‐Renal Solid Organ Transplant Recipients: Systematic Review and Meta‐Analysis

Materials for pulpotomy in immature permanent teeth: a systematic review and meta-analysis

Clinical evidence of photobiomodulation therapy (PBMT) on implant stability and success: a systematic review and meta-analysis

Correction to: Discovery and preclinical characterization of the antagonist anti-PD-L1 monoclonal antibody LY3300054

Discovery and preclinical characterization of the antagonist anti-PD-L1 monoclonal antibody LY3300054

Spatial Memory for Context Reasoning in Object Detection

Impact of Selfishness in Device-to-Device Communication Underlying Cellular Networks

A broadband dual-polarized magneto-electric dipole antenna

Tunneling of spoof surface plasmon polaritons through effective epsilon-near-zero material

Efficient technique for broadband monostatic RCS using the characteristic basis function method with polynomial interpolation

Adaptive generation of excitation-independent characteristic basis functions

Poster Abstract: Hybrid and Adaptive Drone Identification through Motion Actuation and Vision Feature Matching

Poster Abstract: E-Loc: Indoor Localization through Building Electric Wiring

Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide

Tunable Spoof Surface Plasmons Bulleye Antenna

SPACA-MLFACA algorithm for fast solution of electromagnetic scattering problems

Effect of environmental conditions on the sorption of uranium on Fe3O4@MnO2 hollow spheres

Accelerated Direct Solution of Electromagnetic Scattering via Characteristic Basis Function Method With Sherman-Morrison-Woodbury Formula-Based Algorithm

Realization of high-efficiency anomalous reflection using phase gradient metasurface at UHF

Adaptively generating the multiple-scattering characteristic basis functions

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