Search results for: Xiuling Liu

Items from 1 to 20 out of 28 results

article

Cover Image

Xiaoqiang Chen, Mengdie Wang, Zhiyuan Wang, Xiuling Liu, more

Journal of the Science of Food and Agriculture > 104 > 10 > i - i

The cover image is based on the Research Article Theabrownins in dark tea form complexes with tea polysaccharide conjugates by Xiaoqiang Chen et al., https://doi.org/10.1002/jsfa.13431.

article

Theabrownins in dark tea form complexes with tea polysaccharide conjugates

Xiaoqiang Chen, Mengdie Wang, Zhiyuan Wang, Xiuling Liu, more

Journal of the Science of Food and Agriculture > 104 > 10 > 5799 - 5806

BACKGROUND Theabrownins (TBs) are one of most important quality components in dark tea, but have not been produced industrially. In this study, the aqueous extract was obtained from Pu‐erh ripe tea, one kind of dark tea. Caffeine, theaflavin, catechin and saponin were removed by trichloromethane, ethyl acetate and n‐butanol in turn to obtain a TB isolate. The TB isolate was subjected to column chromatography...

article

Design of a scalable microfiber optic temperature transmitter based on fluorescence lifetime

Xuchao Shen, Enlong Zhang, Zikun Jia, Chenyng Wang, more

Microwave and Optical Technology Letters > 66 > 6 > n/a - n/a

To facilitate temperature detection in industrial production settings, an optical fiber temperature transmitter was developed utilizing fluorescence lifetime as its basis. Comprising an upper computer, fiber optic temperature transmitter, and optical fiber probe, the system incorporates a scalable fluorescence detection module. Real‐time temperature calculation is achieved through a microcontroller...

article

Phosphorescent‐Dye‐Sensitized Quantum‐Dot Light‐Emitting Diodes with 37% External Quantum Efficiency

Yanping Wang, Yusen Yang, Dingke Zhang, Tong Zhang, more

Advanced Materials > 35 > 45 > n/a - n/a

Exciton harvesting is of paramount importance for quantum‐dot light‐emitting diodes (QLEDs). Direct exciton harvesting by the quantum dots (QDs) emitting layer suffers from poor hole injection due to the low conduction bands and valence bands of QDs, leading to unbalanced electron–hole injection and recombination. To address this issue, here, an exciton sensitizing approach is reported, where excitons...

article

Carbon‐based light‐induced thermoelastic spectroscopy for ammonia gas sensing

Yu Wang, Tong Cheng, Cunguang Lou, Xin Liu, more

Microwave and Optical Technology Letters > 65 > 5 > 1086 - 1092

A light‐induced thermoelastic spectroscopy (LITES) based on carbon nanotubes (CNT), graphene oxide (GO), and reduced graphene oxide (rGO) coated quartz tuning fork (QTF) was proposed. In order to improve the conversion efficiency of laser energy radiation into the vibration of tuning fork, thin CNT, GO, and rGO layers were coated on the surface of commercial QTF, respectively. Ammonia (NH₃) gas was...

article

Automated characterization and classification of coronary atherosclerotic plaques for intravascular optical coherence tomography

Jianli Yang, Bo Zhang, Hongrui Wang, Feng Lin, more

Biocybernetics and Biomedical Engineering > 2019 > Vol. 39, no. 3 > 719--727

Identification of coronary atherosclerotic plaques and vulnerable plaques is of great clinical significance in the diagnosis and treatment of coronary artery diseases, such as myocardial infarction and sudden death. Optical coherence tomography (OCT) is a catheter-based intracoronary imaging technique with high resolution (<20 μm) adopted to study the morphology of atherosclerotic plaques and identification...

article

Preparation and luminescence properties of Y_3−yAl_5−xGa_xO₁₂:Ce³⁺_y phosphors

Lipeng Jiang, Xiyan Zhang, Shiqi Zhu, He Tang, more

Journal of Materials Science: Materials in Electronics > 2018 > 29 > 11 > 9045-9051

Y_3−yAl_5−xGa_xO₁₂:Ce³⁺_y phosphors were prepared by high temperature solid state reaction method. The crystal structures, the influence of Ga³⁺ concentration on the photoluminescence (PL), cathodoluminescence, thermal stability and morphology of the phosphors were studied in detail. The results indicated that diffraction angle of the samples decreased gradually with the increase of Ga³⁺ ions content...

article

High Performance Automatic Character Skinning Based on Projection Distance

Jun Li, Feng Lin, Xiuling Liu, Hongrui Wang

00003D Research > 2018 > 9 > 1 > 1-8

Skeleton-driven-deformation methods have been commonly used in the character deformations. The process of painting skin weights for character deformation is a long-winded task requiring manual tweaking. We present a novel method to calculate skinning weights automatically from 3D human geometric model and corresponding skeleton. The method first, groups each mesh vertex of 3D human model to a skeleton...

article

A Mg2+-Ge4+ substituting strategy for optimizing color rendering index and luminescence of YAG: Ce3+ phosphors for white LEDs

Lipeng Jiang, Xiyan Zhang, He Tang, Shiqi Zhu, more

Materials Research Bulletin > 2018 > 98 > C > 180-186

Mg²⁺-Ge⁴⁺ ions substituted YAG: Ce³⁺ phosphors (Y₃Al_5-2xMg_xGe_xO₁₂: Ce³⁺) were prepared by high temperature solid state reaction method. X-ray diffraction (XRD), Scanning election microscope (SEM), Photoluminescence (PL) spectra and so on were used to characterize the samples. The effects of Mg²⁺-Ge⁴⁺ concentrations on the morphology, structure, luminescence properties, fluorescence lifetime and white...

article

Constructing a Guided Filter by Exploiting the Butterworth Filter for ECG Signal Enhancement

Ming Liu, HuaQing Hao, Peng Xiong, Feng Lin, more

Journal of Medical and Biological Engineering > 2018 > 38 > 6 > 980-992

Electrocardiogram (ECG) signal enhancement is necessary in telemedicine. In such ECG monitoring systems, noises like muscle artifacts, electrode motion and baseline wander are often embedded in the ECG signals during acquisition and transmission. In this study, a novel method is proposed for the ECG signal enhancement based on the finding that ECG signals extracted over a big data share significant...

article

A novel electrocardiogram arrhythmia classification method based on stacked sparse auto-encoders and softmax regression

Jianli Yang, Yang Bai, Feng Lin, Ming Liu, more

International Journal of Machine Learning and Cybernetics > 2018 > 9 > 10 > 1733-1740

Arrhythmia classification is crucial in electrocardiogram (ECG) based automatic cardiovascular disease diagnosis, e.g., to help prevent stroke or sudden cardiac death. However, the complex individual differences in ECG morphology make it challenging in accurately categorizing arrhythmia heartbeats. To promote robustness of the algorithm for individual differences, we propose a novel ECG arrhythmia...

article

Encaged-anion tunable luminescence of Ce3+-activated single host Ca12Al14O32Cl2 phosphor for UV pumped multi-color LEDs

Xiuling Liu, Yuxue Liu, Duanting Yan, Meng Zhang, more

Materials & Design > 2016 > 107 > C > 139-143

A novel tunable-light-emitting single-host Ca₁₂Al₁₄O₃₂Cl₂:0.5%Ce³⁺ phosphor has been prepared in H₂ atmosphere by a solid-state reaction method. Upon 340nm excitation, the phosphor shows an asymmetric broadband emission centered at 503nm, assigned to the 5d-4f transitions of Ce³⁺. For Ce³⁺ doped Ca₁₂Al₁₄O₃₂Cl₂, a large red-shift (~69nm) and an increased full width at half maximum from 66 to 115nm...

article

ECG signal enhancement based on improved denoising auto-encoder

Peng Xiong, Hongrui Wang, Ming Liu, Suiping Zhou, more

Engineering Applications of Artificial Intelligence > 2016 > 52 > C > 194-202

The electrocardiogram (ECG) is a primary diagnostic tool for examining cardiac tissue and structures. ECG signals are often contaminated by noise, which can manifest with similar morphologies as an ECG waveform in the frequency domain. In this paper, a novel deep neural network (DNN) is proposed to solve the above mentioned problem. This DNN is created from an improved denoising auto-encoder (DAE)...

chapter

A Novel Chaotic Neural Network for Function Optimization

Ting Zhou, Zhenhong Jia, Xiuling Liu

Lecture Notes in Computer Science > Neural Information Processing > Data Mining and Knowledge Discovery > 426-433

Chaotic neural networks have been proved to be powerful tools to solve the optimization problems. And the chaotic neural networks whose activation function is non-monotonous will be more effective than Chen’s chaotic neural network in solving optimization problems, especially in searching global minima of continuous function and traveling salesman problems. In this paper, a novel chaotic neural network...

article

Automatic diagnosis of premature ventricular contraction based on Lyapunov exponents and LVQ neural network

Xiuling Liu, Haiman Du, Guanglei Wang, Suiping Zhou, more

Computer Methods and Programs in Biomedicine > 2015 > 122 > 1 > 47-55

Premature ventricular contraction (PVC) is a common type of abnormal heartbeat. Without early diagnosis and proper treatment, PVC may result in serious harms. Diagnosis of PVC is of great importance in goal-directed treatment and preoperation prognosis. This paper proposes a novel diagnostic method for PVC based on Lyapunov exponents of electrocardiogram (ECG) beats. The methodology consists of preprocessing,...

article

Growth of lanthanide-doped LiGdF4 nanoparticles induced by LiLuF4 core as tri-modal imaging bioprobes

Xuesong Zhai, Pengpeng Lei, Peng Zhang, Zhuo Wang, more

Biomaterials > 2015 > 65 > C > 115-123

Multimodal imaging can compensate for the deficiencies and incorporate the advantages of individual imaging modalities. In this paper, we demonstrated the synthesis of core–shell nanocomposites LiLuF₄@LiGdF₄:Yb,Er/Tm constituted of tetragonal LiLuF₄ nanoparticles as core and Yb,Er/Tm-codoped LiGdF₄ as shell. LiLuF₄@LiGdF₄:Yb,Er/Tm nanoparticles display brighter upconversion luminescence (UCL) than...

chapter

Web-Based Information Retrieval and Visualization for Diagnostic Radiology

Ben Chua, Xiuling Liu, Bin Dong, Feng Lin

2015 19th International Conference on Information Visualisation > 524 - 529

2015 19th International Conference on Information Visualisation (iV)

To improve safety and ease operations in using the medical imaging devices and increase the influx of digital imagery, there is a need for Radiology Information System (RIS) and Picture Archiving and Communication System (PACS) to be used in conjunction to establish a secure network for transmission of patient information. We present a web-based RIS and PACS information retrieval and visualization...

chapter

A novel method for diagnosing premature ventricular contraction beat based on chaos theory

Haiman Du, Yang Bai, Suiping Zhou, Hongrui Wang, more

2014 11th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD) > 497 - 501

2014 11th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

Premature Ventricular Contraction (PVC) is a common type of abnormal heartbeat. Without early diagnosis and proper treatment, PVC may result in more serious harms. Diagnosis of PVC is of great importance in goal-directed treatment and preoperative prognosis. In this paper, we propose a novel diagnostic method for PVC based on chaos theory, where classification of PVC from other types (normal(N), premature...

article

TPX2 Overexpression in Medullary Thyroid Carcinoma Mediates TT Cell Proliferation

Xiaolin Yang, Geling Liu, Hongzhen Xiao, Fang Yu, more

Pathology & Oncology Research > 2014 > 20 > 3 > 641-648

TPX2 (targeting protein for xenopus kinesin-like protein 2), a microtubule-associated protein, plays an important role in the formation of the mitotic spindle. Abnormal expression of TPX2 in various types of malignant tumors has been reported, but less is known for medullary thyroid cancer (MTC). We investigated the expression of TPX2 in human MTC tissues and its potential use as a therapeutic target...

article

Reconstruction of surgical instruments in virtual surgery system

Xiuling Liu, Dong Chen, Yalong Dong, Dongyu Wang, more

International Journal of Machine Learning and Cybernetics > 2014 > 5 > 2 > 225-231

To ensure the realism of the visual effects, the 3D reconstruction of surgical instruments has become an important research topic in virtual surgery systems. In this paper, we propose a method for obtaining the model of the surgical instruments from point cloud data. The point cloud data are first triangulated using the Delaunay algorithm, and then the triangular mesh is simplified and smoothed for...

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INFONA - science communication portal

Search results for: Xiuling Liu

Cover Image

Theabrownins in dark tea form complexes with tea polysaccharide conjugates

Design of a scalable microfiber optic temperature transmitter based on fluorescence lifetime

Phosphorescent‐Dye‐Sensitized Quantum‐Dot Light‐Emitting Diodes with 37% External Quantum Efficiency

Carbon‐based light‐induced thermoelastic spectroscopy for ammonia gas sensing

Automated characterization and classification of coronary atherosclerotic plaques for intravascular optical coherence tomography

Preparation and luminescence properties of Y_3−yAl_5−xGa_xO₁₂:Ce³⁺_y phosphors

High Performance Automatic Character Skinning Based on Projection Distance

A Mg2+-Ge4+ substituting strategy for optimizing color rendering index and luminescence of YAG: Ce3+ phosphors for white LEDs

Constructing a Guided Filter by Exploiting the Butterworth Filter for ECG Signal Enhancement

A novel electrocardiogram arrhythmia classification method based on stacked sparse auto-encoders and softmax regression

Encaged-anion tunable luminescence of Ce3+-activated single host Ca12Al14O32Cl2 phosphor for UV pumped multi-color LEDs

ECG signal enhancement based on improved denoising auto-encoder

A Novel Chaotic Neural Network for Function Optimization

Automatic diagnosis of premature ventricular contraction based on Lyapunov exponents and LVQ neural network

Growth of lanthanide-doped LiGdF4 nanoparticles induced by LiLuF4 core as tri-modal imaging bioprobes

Web-Based Information Retrieval and Visualization for Diagnostic Radiology

A novel method for diagnosing premature ventricular contraction beat based on chaos theory

TPX2 Overexpression in Medullary Thyroid Carcinoma Mediates TT Cell Proliferation

Reconstruction of surgical instruments in virtual surgery system

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