Search results for: Zhaodong Liu

Items from 1 to 20 out of 34 results

article

Brightening Blue Photoluminescence in Nonemission MOF‐2 by Pressure Treatment Engineering

Ting Zhang, Xue Yong, Jingkun Yu, Yixuan Wang, more

Advanced Materials > 35 > 23 > n/a - n/a

As equally essential as the synthesis of new materials, maneuvering new structure configurations can endow the brand‐new functional properties to existing materials, which is also one of the core goals in the synthesis community. In this respect, pressure‐induced emission (PIE) that triggers photoluminescence (PL) in nonemission materials is an emerging stimuli‐responsive smart materials technology...

article

Pressure Engineering Toward Harvesting the Bright Deep‐Blue‐Light Emission in Y‐based Metal‐Organic Frameworks

Yixuan Wang, Chuang Liu, Xue Yong, Xinyi Yang, more

Advanced Functional Materials > 33 > 21 > n/a - n/a

The emergence of metal‐organic frameworks (MOFs) provides a new platform of low‐cost and color‐saturated blue light‐emitting diodes ideal for display and solid‐state lighting applications. However, numerous established MOFs still exhibit weak deep‐blue‐light emission (<450 nm) owing to low energy/charge transfer efficiency. Here a pressure‐treated strategy to greatly enhance photoluminescence performance...

article

Super Strengthening Nano‐Polycrystalline Diamond through Grain Boundary Thinning

Mingguang Yao, Fangren Shen, Dezhou Guo, Hua Zhang, more

Advanced Functional Materials > 33 > 18 > n/a - n/a

Introducing nanostructures into diamonds is quite appealing for the synthesis of superhard materials with superior properties. However, as the grain size decreases to nanoscale, grain boundary effects become crucial yet complicated in the nanopolycrystalline diamond (NPD), making it challenging to tailor nanostructures. Here, atomistic simulations are combined with experiment to demonstrate a strengthening...

article

Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering

Yixuan Wang, Xinyi Yang, Chuang Liu, Zhaodong Liu, more

Angewandte Chemie > 134 > 48 > n/a - n/a

Lanthanide metal–organic frameworks are of great interest in the development of photoluminescence (PL) materials owing to their structural tunability and intrinsic features of lanthanide elements. However, there exists some limitations arising from poor matching with metal ions, thereby exhibiting a weak ligand‐to‐metal energy transfer (LMET) process. Here we demonstrate a pressure‐treated strategy...

article

Titelbild: Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering (Angew. Chem. 48/2022)

Yixuan Wang, Xinyi Yang, Chuang Liu, Zhaodong Liu, more

Angewandte Chemie > 134 > 48 > n/a - n/a

Die Photolumineszenzausbeute in einem grün‐emittierenden metallorganischen Gerüst auf Tb‐Basis lässt sich mittels Druckbehandlung steigern, wie Xinyi Yang, Qianrong Fang, Banglin Chen, Bo Zou und Mitarbeiter in ihrem Forschungsartikel berichten (e202210836). Die verstärkten Wasserstoffbrücken verriegeln die konjugierte Konfiguration und ermöglichen Intersystem‐Crossing, was den Metall‐zu‐Ligand‐Energietransfer...

article

Cover Picture: Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering (Angew. Chem. Int. Ed. 48/2022)

Yixuan Wang, Xinyi Yang, Chuang Liu, Zhaodong Liu, more

Angewandte Chemie International Edition > 61 > 48 > n/a - n/a

A pressure‐treatment strategy for achieving high photoluminescence performance in a green‐emitting Tb‐based metal–organic framework is reported by Xinyi Yang, Qianrong Fang, Banglin Chen, Bo Zou et al. in their Research Article (e202210836). The enhanced hydrogen bonds lock the conjugated configuration, promoting intersystem crossing to effectively drive ligand‐to‐metal energy transfer. The photoluminescence...

article

Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering

Yixuan Wang, Xinyi Yang, Chuang Liu, Zhaodong Liu, more

Angewandte Chemie International Edition > 61 > 48 > n/a - n/a

article

Extreme conditions research using the large‐volume press at the P61B endstation, PETRA III

Robert Farla, Shrikant Bhat, Stefan Sonntag, Artem Chanyshev, more

Journal of Synchrotron Radiation > 29 > 2 > 409 - 423

Penetrating, high‐energy synchrotron X‐rays are in strong demand, particularly for high‐pressure research in physics, chemistry and geosciences, and for materials engineering research under less extreme conditions. A new high‐energy wiggler beamline P61 has been constructed to meet this need at PETRA III in Hamburg, Germany. The first part of the paper offers an overview of the beamline front‐end...

chapter

SPID control for synchronization of complex PIDE networks with time delays

Chengdong Yang, Ancai Zhang, Xinghui Zhang, Zhaodong Liu, more

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society > 5997 - 6001

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

This paper deals with the problem of complex spatio-temporal networks, which is modeled by coupled partial integro-differential equations (PIDEs). A spatial proportional-integral-derivative (SPID) state-feedback controller is studied. With Laypunov direct method, a sufficient condition on synchronization of the complex PIDE network is investigated in terms of linear matrix inequality (LMIs). Finally,...

article

A novel multi-focus image fusion approach based on image decomposition

Zhaodong Liu, Yi Chai, Hongpeng Yin, Jiayi Zhou, more

Information Fusion > 2017 > 35 > C > 102-116

Multi-focus image fusion is an effective technique to integrate the relevant information from a set of images with the same scene, into a comprehensive image. The fused image would be more informative than any of the source images. In this paper, a novel fusion scheme based on image cartoon-texture decomposition is proposed. Multi-focus source images are decomposed into cartoon content and texture...

article

A novel sparse-representation-based multi-focus image fusion approach

Hongpeng Yin, Yanxia Li, Yi Chai, Zhaodong Liu, more

Neurocomputing > 2016 > 216 > C > 216-229

In this paper, a novel multi-focus image fusion approach is presented. Firstly, a joint dictionary is constructed by combining several sub-dictionaries which are adaptively learned from source images using K-singular value decomposition (K-SVD) algorithm. The proposed dictionary constructing method does not need any prior knowledge, and no external pre-collected training image data is required either...

article

A novel dictionary learning approach for multi-modality medical image fusion

Zhiqin Zhu, Yi Chai, Hongpeng Yin, Yanxia Li, more

Neurocomputing > 2016 > 214 > C > 471-482

Multi-modality medical image fusion technology can integrate the complementary information of different modality medical images, obtain more precise, reliable and better description of lesions. Dictionary learning based image fusion draws a great attention in researchers and scientists, for its high performance. The standard learning scheme uses entire image for dictionary learning. However, in medical...

article

Garnets in the majorite–pyrope system: symmetry, lattice microstrain, and order–disorder of cations

Zhaodong Liu, Wei Du, Toru Shinmei, Steeve Gréaux, more

Physics and Chemistry of Minerals > 2017 > 44 > 4 > 237-245

We present a systematic experimental study on the phase transition, lattice microstrain, and order–disorder of cations for garnets in the majorite–pyrope system. Polycrystalline gem-quality garnets were synthesized at high pressure and high temperature using a Kawai-type multi-anvil apparatus. A phase transition from a cubic to tetragonal structure is clearly observed for garnets with the majorite...

chapter

The research on the design of the KU-band ultra-wideband RF receiver

Mengyun Hu, Jianyi Zhou, Xiaohui Zhou, Laituan Zhang, more

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) > 1 - 3

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

This paper provide the detailed design of a RF frontend receiver system in 14GHz with intermediate frequency 1.6GHz, 1GHz radio frequency bandwidth. The receiver uses the traditional superheterodyne structure, able to obtain high receiver sensitivity and channel selectivity and small size. The tests' results show that the overall receiver performance is generally satisfactory. In the receiver, the...

chapter

Design of a low phase noise LO module for IEEE 802.11ac system

Ruoqiao Zhang, Jianyi Zhou, Zhiqiang Yu, Zhaodong Liu, more

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) > 1 - 4

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

The design of a low-phase-noise local oscillator (LO) module for RF transceivers which support the very high throughput mode of IEEE 802.11ac standard is presented in this paper. This LO module provides both intermediate frequency (IF) LO and radio frequency (RF) LO by using HMC83x series chips. Low pass filters and amplifiers are used to improve output power and suppress harmonics of LO signals....

chapter

Design of the high-performance radio frequency receiver for IEEE 802.11ac system

Xiaohui Zhou, Jianyi Zhou, Zhiqiang Yu, Laituan Zhang, more

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) > 1 - 3

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

This paper presents the design of RF receiver operating in 5.0GHz to 6.0GHz band for high throughput IEEE 802.11ac system. A double-conversion super-heterodyne architecture with IF of 1.05GHz is employed and the maximum bandwidth is 80MHz. Measurement results show that the receiver has excellent performance. The noise figure is about 4.6dB and the gain flatness over any 80MHz bandwidth is less than...

chapter

Design of the wide band transmitter for the Ku band RF frontend

Zhaodong Liu, Jianyi Zhou, Zhiqiang Yu, Ruoqiao Zhang, more

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) > 1 - 3

2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

Implementation of a wideband RF transmitter is reported in this paper. In order to achieve the best performance, a super heterodyne architecture with RF of 14GHz and IF of 1.6GHz is employed, and the signal bandwidth is 1000MHz. Finally, measurement results of the transmitter are provided and the overall system performance indicated by EVM (Error Vector Magnitude) with 100MHz signal bandwidth (maximum...

article

Phase relations in the system MgSiO3–Al2O3 up to 52GPa and 2000K

Zhaodong Liu, Tetsuo Irifune, Masayuki Nishi, Yoshinori Tange, more

Physics of The Earth and Planetary Interiors > 2016 > 257 > C > 18-27

Phase relations in the system MgSiO₃–Al₂O₃ have been determined for pressures from 15 to 52GPa and at a temperature of 2000K from in situ synchrotron X-ray diffraction measurements obtained using sintered diamond anvils in a multi-anvil apparatus. A wide two-phase region of garnet and corundum is found to exist up to 27GPa; at higher pressures, a phase assemblage of aluminous bridgmanite and corundum...

chapter

Support Vector Machines for Regression and Applications to Software Quality Prediction

Xin Jin, Zhaodong Liu, Rongfang Bie, Guoxing Zhao, more

Lecture Notes in Computer Science > Computational Science – ICCS 2006 > Workshop on Computational Science in Software Engineering (CSSE’6) > 781-788

Software metrics are the key tool in software quality management. In this paper, we propose to use support vector machines for regression applied to software metrics to predict software quality. In experiments we compare this method with other regression techniques such as Multivariate Linear Regression, Conjunctive Rule and Locally Weighted Regression. Results on benchmark dataset MIS, using mean...

article

In situ low-temperature Raman studies of iodine molecules confined in the one-dimensional channels of AlPO4-5 crystals

Shuanglong Chen, Ye Yuan, Xigui Yang, Mingrun Du, more

Microporous and Mesoporous Materials > 2016 > 221 > C > 76-80

We have performed in situ low-temperature Raman spectroscopy studies on iodine molecules confined in the one-dimensional (1D) round channels of AlPO₄-5 (AFI) crystals. Polarized Raman measurements show that the Raman intensity of individual iodine molecules parallel to channel axis (termed lying molecules) increases more than that of iodine molecules perpendicular to channel axis (termed standing...

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INFONA - science communication portal

Search results for: Zhaodong Liu

Brightening Blue Photoluminescence in Nonemission MOF‐2 by Pressure Treatment Engineering

Pressure Engineering Toward Harvesting the Bright Deep‐Blue‐Light Emission in Y‐based Metal‐Organic Frameworks

Super Strengthening Nano‐Polycrystalline Diamond through Grain Boundary Thinning

Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering

Titelbild: Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering (Angew. Chem. 48/2022)

Cover Picture: Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering (Angew. Chem. Int. Ed. 48/2022)

Maximized Green Photoluminescence in Tb‐Based Metal–Organic Framework via Pressure‐Treated Engineering

Extreme conditions research using the large‐volume press at the P61B endstation, PETRA III

SPID control for synchronization of complex PIDE networks with time delays

A novel multi-focus image fusion approach based on image decomposition

A novel sparse-representation-based multi-focus image fusion approach

A novel dictionary learning approach for multi-modality medical image fusion

Garnets in the majorite–pyrope system: symmetry, lattice microstrain, and order–disorder of cations

The research on the design of the KU-band ultra-wideband RF receiver

Design of a low phase noise LO module for IEEE 802.11ac system

Design of the high-performance radio frequency receiver for IEEE 802.11ac system

Design of the wide band transmitter for the Ku band RF frontend

Phase relations in the system MgSiO3–Al2O3 up to 52GPa and 2000K

Support Vector Machines for Regression and Applications to Software Quality Prediction

In situ low-temperature Raman studies of iodine molecules confined in the one-dimensional channels of AlPO4-5 crystals

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