Search results for: Zhenfeng Zhu

Items from 1 to 20 out of 155 results

article

From Night to Day: GANs Based Low Quality Image Enhancement

Yingying Meng, Deqiang Kong, Zhenfeng Zhu, Yao Zhao

Neural Processing Letters > 2019 > 50 > 1 > 799-814

Nighttime images have lower contrast and higher noise than their daytime counterparts of the same scene. The aim of nighttime image enhancement is to improve the visual quality of nighttime images, so that they are visually as close as possible to daytime images. This problem is still challenging because of the deteriorated conditions of illumination lack and uneven lighting. In this paper, we propose...

article

Towards learning a semantic-consistent subspace for cross-modal retrieval

Meixiang Xu, Zhenfeng Zhu, Yao Zhao

Multimedia Tools and Applications > 2019 > 78 > 1 > 389-412

A great many of approaches have been developed for cross-modal retrieval, among which subspace learning based ones dominate the landscape. Concerning whether using the semantic label information or not, subspace learning based approaches can be categorized into two paradigms, unsupervised and supervised. However, for multi-label cross-modal retrieval, supervised approaches just simply exploit multi-label...

article

Ag Nanowire @ Nano-groove Fabrication for Enhanced Light Harvesting Through Silicon Chemical Etching

Han Dai, Jie Sun, Zhutie Li, Xinxiang Yu, more

Transactions of the Indian Institute of Metals > 2018 > 71 > 7 > 1681-1686

Chemical etching was employed to fabricate Ag nanowire @ nano-grooves on silicon to increase light harvesting. Ag nanowire @ nano-groove structures (300 nm to 1.7 μm in size) were obtained by controlling the etching time. A significant increase in the surface roughness was achieved around the Ag nanowire @ grooves with an etching time of 10–30 min. According to finite difference time domain simulations,...

article

Population pharmacokinetics and pharmacodynamics of ticagrelor and AR-C124910XX in Chinese healthy male subjects

Shuaibing Liu, Ling Xue, Xiangfen Shi, Zhiyong Sun, more

European Journal of Clinical Pharmacology > 2018 > 74 > 6 > 745-754

Background Ticagrelor, the first reversible P2Y₁₂ receptor antagonist, exhibits faster onset and offset of antiplatelet effects and more consistent platelet inhibition than clopidogrel in both healthy subjects and patients with stable coronary artery disease. Objective The objectives of this study were to establish a population pharmacokinetics (PK) and pharmacodynamics (PD) model of ticagrelor...

article

Chemical profiling and quantification of ShenKang injection, a systematic quality control strategy using ultra high performance liquid chromatography with Q Exactive hybrid quadrupole orbitrap high‐resolution accurate mass spectrometry

Tanye Xu, Lihua Zuo, Zhi Sun, Peile Wang, more

Journal of Separation Science > 40 > 24 > 4872 - 4879

ShenKang injection is traditional Chinese medicine used to treat chronic renal failure in China. It is a compound preparation that consists of four herbs: Rhubarb, Salvia miltiorrhiza, Safflower and Radix Astragali. We developed an ultra high pressure liquid chromatography coupled with Q Exactive hybrid quadrupole‐orbitrap high resolution accurate mass spectrometry tandem mass spectrometry method...

article

Qualitative and quantitative determination of YiXinShu Tablet using ultra high performance liquid chromatography with Q Exactive hybrid quadrupole orbitrap high‐resolution accurate mass spectrometry

Zhi Sun, Zhuolun Li, Lihua Zuo, Zhenhui Wang, more

Journal of Separation Science > 40 > 22 > 4453 - 4466

To clarify and quantify the chemical profile of YiXinShu Tablet rapidly, a feasible and accurate strategy was developed by applying ultra high performance liquid chromatography with Q Exactive hybrid quadrupole orbitrap high‐resolution accurate mass spectrometry. A total of 105 components were identified, including 25 phenanthraquinones, 11 lactones, 19 lignans, 24 acids, and 26 other compounds. Among...

chapter

De-biased dart ensemble model for personalized recommendation

Deqiang Kong, Jingyuan Tang, Zhenfeng Zhu, Jian Cheng, more

2017 IEEE International Conference on Multimedia and Expo (ICME) > 553 - 558

2017 IEEE International Conference on Multimedia and Expo (ICME)

Personalized recommendation aims to use the historical behavior of users to recommend new items that are likely to be of interest to them. Due to a tiny improvement of it can lead to a huge profits, lots of giant e-commerce companies, such as Amazon, Alibaba and eBay, have put their great effort on this field. In this paper, we formulate the problem of personalized recommendation as a tree based regression...

article

A portable confocal hyperspectral microscope without any scan or tube lens and its application in fluorescence and Raman spectral imaging

Jingwei Li, Fuhong Cai, Yongjiang Dong, Zhenfeng Zhu, more

Optics Communications > 2017 > 392 > C > 1-6

In this study, a portable confocal hyperspectral microscope is developed. In traditional confocal laser scanning microscopes, scan lens and tube lens are utilized to achieve a conjugate relationship between the galvanometer and the back focal plane of the objective, in order to achieve a better resolution. However, these lenses make it difficult to scale down the volume of the system. In our portable...

article

Nonlinear relationship between enteric-coated mycophenolate sodium dose and mycophenolic acid exposure in Han kidney transplantation recipients

Jun Zhang, Mengmeng Jia, Lihua Zuo, Na Li, more

Acta Pharmaceutica Sinica B > 2017 > 7 > 3 > 347-352

The aim of the research was to investigate the pharmacokinetics (PK) of enteric-coated mycophenolate sodium (EC-MPS) by quantification of the active metabolite of mycophenolic acid (MPA) after multiple escalating oral doses in Han kidney transplant recipients. A total of 28 Han postoperative kidney transplant recipients were given a multiple-dose of 540, 720 or 900mg of EC-MPS two times a day in combination...

article

Rapid determination of 30 bioactive constituents in XueBiJing injection using ultra high performance liquid chromatography-high resolution hybrid quadrupole-orbitrap mass spectrometry coupled with principal component analysis

Lihua Zuo, Zhi Sun, Yurong Hu, Ya Sun, more

Journal of Pharmaceutical and Biomedical Analysis > 2017 > 137 > C > 220-228

Xuebijing injection (XBJ) is a traditional Chinese herbal prescription widely used in the treatment of sepsis. Extensive chemical studies revealed that XBJ injection contains amino acids, phenolic acids, flavonoid glycosides, terpeneglycosides and phthalides. In this study, the applicability of ultra high performance liquid chromatography coupled with high resolution hybrid quadruple-orbitrap mass...

article

Synthesis of Ag2O and Ag co-modified flower-like SnS2 composites with enhanced photocatalytic activity under solar light irradiation

Lu Deng, Zhenfeng Zhu, Liu Liu, Hui Liu

Solid State Sciences > 2017 > 63 > C > 76-83

Three-dimensional Ag₂O and Ag co-modified flower-like SnS₂ composites have been synthesized through a facile hydrothermal and photoreduction process. The physical and chemical properties of Ag₂O and Ag co-modified flower-like SnS₂ composites were carefully studied by using XRD, SEM, TEM, UV–vis diffuse reflectance spectra (DRS) and XPS. The photocatalytic activity of the as-prepared products was evaluated...

article

A novel nitrite biosensor based on the direct electrochemistry of horseradish peroxidase immobilized on porous Co3O4 nanosheets and reduced graphene oxide composite modified electrode

Hui Liu, Kai Guo, Jing Lv, Yuan Gao, more

Sensors and Actuators B: Chemical > 2017 > 238 > C > 249-256

Porous Co₃O₄ hexagonal nanosheets (PCHNSs) with a well-defined morphology have been synthesized successfully via a hydrothermal process and followed by calcinations. Co₃O₄ nanosheets immobilizing horseradish peroxidase (HRP), together with reduced graphene oxide, have been used to modify glassy carbon electrode to fabricate a mediator-free biosensor. The morphology and structure of PCHNSs are studied...

article

Graphene oxide nanoparticles for two-photon fluorescence imaging of zebrafish

Dongyu Li, Li Xue, Zhenfeng Zhu, Xinyuan Zhao, more

Optical and Quantum Electronics > 2016 > 48 > 11 > 1-12

Two-photon microscopy is an important technology for both ex vivo tissue and in vivo animal imaging, due to its deep-penetration and optical sectioning capability in biological tissue. Graphene has consistently been a hot research topic owing to its unique optical, electronic and mechanical properties. In this paper, we synthesized graphene oxide nanoparticles (GONs), which is a derivative of graphene,...

article

Improved photoelectrochemical performance of Z-scheme g-C3N4/Bi2O3/BiPO4 heterostructure and degradation property

Junqi Li, Huan Yuan, Zhenfeng Zhu

Applied Surface Science > 2016 > 385 > C > 34-41

In g-C₃N₄/Bi₂O₃/BiPO₄, the p–n junction between p-type Bi₂O₃ and n-type BiPO₄ was encapsulated by g-C₃N₄ and a direct Z-scheme was built between g-C₃N₄ and Bi₂O₃. The optical, morphological and photoelectrochemical (PEC) properties of BiPO₄, g-C₃N₄/BiPO₄, Bi₂O₃/BiPO₄ and g-C₃N₄/Bi₂O₃/BiPO₄ hierarchical Z-scheme system were studied. More than 90% photodegradation of methyl orange (MO) with the exposure...

article

Development and validation of a sensitive UHPLC–MS/MS method for quantitation of prucalopride in rat plasma and its application to pharmacokinetics study

Zhi Sun, Lihua Zuo, Jian Kang, Lin Zhou, more

Journal of Chromatography B > 2016 > 1033-1034 > C > 328-333

A rapid, sensitive, selective and accurate ultra high performance liquid chromatography with tandem mass spectrometry (UHPLC–MS/MS) method was developed and validated for the quantitation of prucalopride in rat plasma using carbamazepine as an internal standard (IS). Separation was achieved on a Waters ACQUITY UHPLC^® HSS C₁₈ column (2.1mm×50mm, 1.8μm) column with a gradient mobile phase consisting...

article

A novel fabrication of Cu2O@Cu7S4 core-shell micro/nanocrystals from Cu2O temples and enhanced photocatalytic activities

Junqi Li, Long Sun, Ying Yan, Zhenfeng Zhu

Materials Research Bulletin > 2016 > 80 > C > 200-208

Uniform and monodispersed Cu₂O@Cu₇S₄ core-shell micro/nanocrystals have been synthesized successfully at room temperature via a simple chemical etching reaction, using Cu₂O as sacrificial template. The structure and properties of the crystals were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS)...

article

Direct bandgap narrowing of TiO2/MoO3 heterostructure composites for enhanced solar-driven photocatalytic activity

Hui Liu, Ting Lv, Chunkui Zhu, Zhenfeng Zhu

Solar Energy Materials and Solar Cells > 2016 > 153 > C > 1-8

TiO₂ nanobelts/MoO₃ nanosheets (TM) heterostructure composites have been synthesized via an in-situ growth method in which the TiO₂–MoS₂ was used as precursor. The whole fabrication process involved the preparation of MoS₂ nanoparticles modified TiO₂ nanobelts (TiO₂ Nbs) and subsequently transformation of the MoS₂ to MoO₃ nanosheets. The properties of TM were characterized by XRD, FE-SEM, TEM, EDX,...

article

Preparation of Ultrathin 2D MoS2/Graphene Heterostructure Assembled Foam-like Structure with Enhanced Electrochemical Performance for Lithium-ion Batteries

Hui Liu, Xianjin Chen, Lu Deng, Xing Su, more

Electrochimica Acta > 2016 > 206 > C > 184-191

A simple one-step surfactant-free hydrothermal approach is presented for the facile synthesis of ultrathin 2D MoS₂/graphene heterostructure (rGO@MoS₂) assembled foam-like structure. The morphology and structure of the rGO@MoS₂ nanocomposite are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy...

article

One-step in-situ fabrication of silver-modified Cu₂O crystals with enhanced visible photocatalytic activity

Junqi Li, Long Sun, Ying Yan, Zhenfeng Zhu

IET Micro & Nano Letters > 2016 > 11 > 7 > 363 - 365

Silver-modified cuprous oxide (Cu₂O) crystals (SMCCs) were successfully created by a facile one-step in-situ Ag-loading reaction under room temperature. The samples were studied by X-ray diffraction, scanning electron microscopy, UV-vis diffuse reflectance spectra and transmission electron microscopy. The photocatalytic performance of the SMCCs were estimated by using methyl orange aqueous solution...

article

A Red to Near‐IR Fluorogen: Aggregation‐Induced Emission, Large Stokes Shift, High Solid Efficiency and Application in Cell‐Imaging

Yi Jia Wang, Yang Shi, Zhaoyang Wang, Zhenfeng Zhu, more

Chemistry – A European Journal > 22 > 28 > 9784 - 9791

A tetraphenylethene (TPE) derivative modified with the strong electron acceptor 2‐dicyano‐methylene‐3‐cyano‐4,5,5‐trimethyl‐2,5‐dihydrofuran (TCF) was obtained in high yield by a simple two‐step reaction. The resultant TPE‐TCF showed evident aggregation‐induced emission (AIE) features and pronounced solvatochromic behavior. Changing the solvent from apolar cyclohexane to highly polar acetonitrile,...

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INFONA - science communication portal

Search results for: Zhenfeng Zhu

From Night to Day: GANs Based Low Quality Image Enhancement

Towards learning a semantic-consistent subspace for cross-modal retrieval

Ag Nanowire @ Nano-groove Fabrication for Enhanced Light Harvesting Through Silicon Chemical Etching

Population pharmacokinetics and pharmacodynamics of ticagrelor and AR-C124910XX in Chinese healthy male subjects

Chemical profiling and quantification of ShenKang injection, a systematic quality control strategy using ultra high performance liquid chromatography with Q Exactive hybrid quadrupole orbitrap high‐resolution accurate mass spectrometry

Qualitative and quantitative determination of YiXinShu Tablet using ultra high performance liquid chromatography with Q Exactive hybrid quadrupole orbitrap high‐resolution accurate mass spectrometry

De-biased dart ensemble model for personalized recommendation

A portable confocal hyperspectral microscope without any scan or tube lens and its application in fluorescence and Raman spectral imaging

Nonlinear relationship between enteric-coated mycophenolate sodium dose and mycophenolic acid exposure in Han kidney transplantation recipients

Rapid determination of 30 bioactive constituents in XueBiJing injection using ultra high performance liquid chromatography-high resolution hybrid quadrupole-orbitrap mass spectrometry coupled with principal component analysis

Synthesis of Ag2O and Ag co-modified flower-like SnS2 composites with enhanced photocatalytic activity under solar light irradiation

A novel nitrite biosensor based on the direct electrochemistry of horseradish peroxidase immobilized on porous Co3O4 nanosheets and reduced graphene oxide composite modified electrode

Graphene oxide nanoparticles for two-photon fluorescence imaging of zebrafish

Improved photoelectrochemical performance of Z-scheme g-C3N4/Bi2O3/BiPO4 heterostructure and degradation property

Development and validation of a sensitive UHPLC–MS/MS method for quantitation of prucalopride in rat plasma and its application to pharmacokinetics study

A novel fabrication of Cu2O@Cu7S4 core-shell micro/nanocrystals from Cu2O temples and enhanced photocatalytic activities

Direct bandgap narrowing of TiO2/MoO3 heterostructure composites for enhanced solar-driven photocatalytic activity

Preparation of Ultrathin 2D MoS2/Graphene Heterostructure Assembled Foam-like Structure with Enhanced Electrochemical Performance for Lithium-ion Batteries

One-step in-situ fabrication of silver-modified Cu₂O crystals with enhanced visible photocatalytic activity

A Red to Near‐IR Fluorogen: Aggregation‐Induced Emission, Large Stokes Shift, High Solid Efficiency and Application in Cell‐Imaging

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