Search

Your search keyword '"Liao, Ren"' showing total 225 results
Start Over Author "Liao, Ren"
225 results on '"Liao, Ren"'

1. Performance analysis for a rotary compressor at high speed: experimental study and mathematical modeling

Author

Zheng, Chuntai, Zhao, Wei, Lyu, Benshuai, Gao, Keke, Cao, Hongjun, Zhong, Lei, Gao, Yi, and Liao, Ren

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

This paper conducted a comprehensive study on the performance of a rotary compressor over a rotational speed range of 80Hz to 200Hz through experimental tests and mathematical modeling. A compressor performance test rig was designed to conduct the performance tests, with fast-response pressure sensors and displacement sensors capturing the P-V diagram and dynamic motion of the moving components. Results show that the compressor efficiency degrades at high speeds due to the dominant loss factors of leakage and discharge power loss. Supercharging effects become significant at speeds above 160Hz, and its net effects reduce the compressor efficiency, especially at high speeds. This study identifies and analyzes the loss factors on the mass flow rate and power consumption based on experimental data, and hypothesizes possible mechanisms for each loss factor, which can aid in the design of a high-speed rotary compressor with higher efficiency.

Published
2024

2. Observation of 2D Mott insulator and $\pi$-superfluid quantum phase transition in shaking optical lattice

Author

Sun, Jingxin, Zhao, Pengju, Hu, Zhongshu, Jin, Shengjie, Liao, Ren, Liu, Xiong-Jun, and Chen, Xuzong

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics
Abstract

The Mott insulator and superfluid phase transition is one of the most prominent phenomena in ultracold atoms. In this work, we report the observation of a novel 2D quantum phase transition between Mott insulator and $\pi$ superfluid in a shaking optical lattice. In the deep optical lattice regime, the lowest $s$-band can be tuned to Mott phase, while the higher $p_{x,y}$ bands are itinerant for having larger bandwidth. Through a shaking technique coupling the $s$ orbital to $p_{x,y}$ orbital states, we experimentally observe the transition between the states of the $s$ and $p_{x,y}$ bands, leading to a quantum phase transition from 2D $s$-orbital Mott phase to the $p_{x,y}$-orbital superfluid which condensed at $(\pi,\pi)$ momentum.

Published
2023

3. Simulation of classical Ising-like magnetism with a Mott insulator of paired atoms

Author

Liao, Ren, Sun, Jingxin, Li, Hui, Yang, Shifeng, Zhao, Pengju, Huang, Xinyi, Xiong, Wei, Zhou, Xiaoji, Li, Dingping, Liu, Xiongjun, and Chen, Xuzong

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics
Abstract

Quantum simulation of the XXZ model with a two-component Bose or Fermi Hubbard model based on a Mott insulator background has been widely used in the investigations of quantum magnetism with ultracold neutral atoms. In most cases, the diagonal spin-spin interaction is always accompanied by a large spin-exchange interaction which hinders the formation of long-range magnetic order at low temperature. Here we show that the spin-exchange interaction can be strongly reduced in a Mott insulator of paired atoms, while the diagonal spin-spin interaction remains unaffected. Thus, the effective magnetic model is quite close to an exact classical Ising model in the textbook. And we analysed an experimentally achievable three-component Fermi-Hubbard model of $\mathrm{{}^{6}Li}$ with two hyperfine levels of atoms paired in the lattice. We find the long-range antiferromagnetic order of such a three-component Fermi-Hubbard model can be much stronger than that of a typical two-component Fermi-Hubbard model at low temperature. And we discussed the possiblity of simulating an exact two-dimensional ferromagnetic Ising model in a Mott insulator of paired bosonic atoms. Our results may be useful for experimental investigation of the long-range Ising-like magnetism with ultracold neutral atoms under thermal equilibrium.

Published
2021
Full Text
View/download PDF

4. Simulation of Dynamical Quantum Phase Transition of the 1D Transverse Ising Model with a Double-chain Bose-Hubbard model

Author

Liao, Ren, Xiong, Fangyu, and Chen, Xuzong

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics
Abstract

We propose a spinless Bose-Hubbard model in an one-dimensional (1D) double-chain tilted lattice at unit filling per cell. A subspace of this model can be faithfully mapped to the 1D transverse Ising model through superexchange interaction with second-order perturbation theory. At a valid parameter region, numerical results show good agreement of these two models both on energy spectrums and correlation functions. And we show that the dynamical quantum phase transition of the effective 1D transverse Ising model can be simulated. With carefully designed procedures for producing the dynamical quantum phase transition of the 1D transverse Ising model from a Mott insulator, the rate function of the recurrence probability to the ground-state manifold shows the same nonanalyticality at periodic time points as theory predicts. Our results may give some inspirations on simulating 1D transverse Ising model with superexchange interaction and exploring its dynamical quantum phase transition in experiment.

Published
2020
Full Text
View/download PDF

7. Plasma‐Driven Selenization for Electrical Property Enhancement in Janus 2D Materials.

Author

He, Shih‐Ming, Zhuang, Jia‐Yung, Chen, Ciao‐Fen, Liao, Ren‐Kuei, Lo, Shun‐Tsung, Lin, Yen‐Fu, and Su, Ching‐Yuan

Subjects
HYDROGEN plasmas, CHARGE carrier mobility, RAMAN spectroscopy, ELECTRONIC equipment, ELECTRONIC structure
Abstract

The recent emergence of Janus 2D materials like SnSSe, derived from SnS2, reveals unique electrical and optical features, such as asymmetrical electronic structure, enhanced carrier mobility, and tunable bandgap. Previous theoretical studies have discuss the electronic properties of Janus SnSSe, but experimental evidence is limited. This study presents a two‐step method for synthesizing Janus SnSSe, involving hydrogen plasma treatment and in situ selenization. Optimized conditions (38 W, 1.5 min, 250 °C) are determined using Raman spectroscopy and AFM analysis. XPS confirmed SnSSe's elemental composition, while KPFM reveals a significant reduction in the work function (from 5.26 down to 5.14 eV) for the first time, indicating asymmetrically induced n‐type doping. Finally, field‐effect transistors (FETs) derived from SnSSe exhibited significantly enhanced mobility and on‐current, as well as n‐type doping, compared to SnS2‐based FETs. These findings lay a crucial foundation for developing high‐performance 2D electronic and optoelectronic devices. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

21. An Individualized Red Blood Cell Transfusion Strategy Using Pediatric Perioperative-Transfusion-Trigger Score Reduced Perioperative Blood Exposure for Children: A Randomized Controlled Clinical Trial

Author

Luo,Zhen, Li,Yansong, Li,Xiaoqiang, Liao,Ren, Luo,Zhen, Li,Yansong, Li,Xiaoqiang, and Liao,Ren

Abstract

Zhen Luo,1 Yansong Li,2 Xiaoqiang Li,1 Ren Liao1 1Department of Anesthesiology, Sichuan University West China Hospital, Chengdu, People’s Republic of China; 2Department of Anesthesiology, Center for Brain Science, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, People’s Republic of ChinaCorrespondence: Xiaoqiang Li, Email 39006900@qq.comObjective: The optimal red blood cell transfusion strategy for children remains unclear. We developed an individualized red blood cell transfusion strategy for children and tested the hypothesis that transfusion guided by this strategy could reduce blood exposure, without increasing perioperative complications in children.Methods: In this randomized controlled clinical trial, 99 children undergoing noncardiac surgeries who had blood loss of more than 20% total blood volume were randomly assigned to an individualized-strategy group using Pediatric Perioperative-Transfusion-Trigger Score or a control group. The amount of transfused red blood cell was counted, and patients were followed up for postoperative complications within 30 days.Results: Twenty-six children (53.1%) in the individualized-strategy group received transfusion perioperatively, as compared with 37 children (74%) in the control group (p < 0.05). During surgery, children in the individualized-strategy group were exposed to fewer transfusions than in the control group (0.87± 1.03 vs 1.33± 1.20 Red-Blood-Cell units per patient, p = 0.02). The incidence of severe complications in the individualized-strategy group had a lower trend compared to the control group (8.2% vs 18%, p = 0.160). No significant difference was found in the other outcomes.Conclusion: This trial proved that red blood cell transfusion guided by the individualized strategy reduced perioperative blood exposure in children, without increasing the incidence of severe complications. This conclusion needs to be reaffirmed by larger-scale, multicenter clinical trials.Keywords: red

Published
2023

26. Advances in perioperative patient blood management with enhanced recovery in orthopedics: current situation and future prospects

Author

XIE, JinWei, primary, LIAO, Ren, additional, XIANG, Bin, additional, HUANG, Qiang, additional, HUANG, ZeYu, additional, ZHOU, ZongKe, additional, SHEN, Bin, additional, KANG, PengDe, additional, YANG, Jing, additional, MA, Jun, additional, HU, Wen, additional, LIU, Bin, additional, NIU, Ting, additional, and PEI, FuXing, additional

Published
2022
Full Text
View/download PDF

34. sj-pdf-1-imr-10.1177_03000605211027736 - Supplemental material for Efficacy of magnesium sulfate as an adjuvant to rocuronium in general anaesthesia: a meta-analysis

Author

Sun, Haiyan, Jin, Tao, Wu, Xiping, Yang, Lei, Zuo, Yunxia, and Liao, Ren

Subjects
education, 111199 Nutrition and Dietetics not elsewhere classified, Cardiology, 170199 Psychology not elsewhere classified, 111799 Public Health and Health Services not elsewhere classified, 110604 Sports Medicine, FOS: Health sciences, 110306 Endocrinology, 110308 Geriatrics and Gerontology, 111099 Nursing not elsewhere classified, 111708 Health and Community Services, 160807 Sociological Methodology and Research Methods, 111702 Aged Health Care, 111403 Paediatrics, 110904 Neurology and Neuromuscular Diseases, 110203 Respiratory Diseases, 110315 Otorhinolaryngology, FOS: Clinical medicine, 110319 Psychiatry (incl. Psychotherapy), humanities, FOS: Sociology, FOS: Psychology, 110599 Dentistry not elsewhere classified, 110323 Surgery, 110305 Emergency Medicine, 111599 Pharmacology and Pharmaceutical Sciences not elsewhere classified, 111299 Oncology and Carcinogenesis not elsewhere classified, 110314 Orthopaedics
Abstract

Supplemental material, sj-pdf-1-imr-10.1177_03000605211027736 for Efficacy of magnesium sulfate as an adjuvant to rocuronium in general anaesthesia: a meta-analysis by Haiyan Sun, Tao Jin, Xiping Wu, Lei Yang, Yunxia Zuo and Ren Liao in Journal of International Medical Research

Published
2021
Full Text
View/download PDF

35. sj-pdf-2-imr-10.1177_03000605211027736 - Supplemental material for Efficacy of magnesium sulfate as an adjuvant to rocuronium in general anaesthesia: a meta-analysis

Author

Sun, Haiyan, Jin, Tao, Wu, Xiping, Yang, Lei, Zuo, Yunxia, and Liao, Ren

Subjects
education, 111199 Nutrition and Dietetics not elsewhere classified, Cardiology, 170199 Psychology not elsewhere classified, 111799 Public Health and Health Services not elsewhere classified, 110604 Sports Medicine, FOS: Health sciences, 110306 Endocrinology, 110308 Geriatrics and Gerontology, 111099 Nursing not elsewhere classified, 111708 Health and Community Services, 160807 Sociological Methodology and Research Methods, 111702 Aged Health Care, 111403 Paediatrics, 110904 Neurology and Neuromuscular Diseases, 110203 Respiratory Diseases, 110315 Otorhinolaryngology, FOS: Clinical medicine, 110319 Psychiatry (incl. Psychotherapy), humanities, FOS: Sociology, FOS: Psychology, 110599 Dentistry not elsewhere classified, 110323 Surgery, 110305 Emergency Medicine, 111599 Pharmacology and Pharmaceutical Sciences not elsewhere classified, 111299 Oncology and Carcinogenesis not elsewhere classified, 110314 Orthopaedics
Abstract

Supplemental material, sj-pdf-2-imr-10.1177_03000605211027736 for Efficacy of magnesium sulfate as an adjuvant to rocuronium in general anaesthesia: a meta-analysis by Haiyan Sun, Tao Jin, Xiping Wu, Lei Yang, Yunxia Zuo and Ren Liao in Journal of International Medical Research

Published
2021
Full Text
View/download PDF

39. Building a Global Launch Network: Extending the Reach of Dedicated Small Satellite Launch Using New, Data-Driven Spaceport Assessment Tools

Author

Fuller, John, Liao, Ren, Patel, Kirit, Bandla, Sirisha, Jan, Monica, McElroy, Wade, and Vaughn, Mandy

Subjects
small satellite, data-driven spaceport assessment tools, launch, global launch network
Abstract

The proliferation and sustained growth of small satellite architecture solutions, once an uncertain aspect of tomorrow’s space industry, are now largely perceived as a firm reality. Recent trends continue to show an increasing fraction of launch industry revenue being captured by small and dedicated launch vehicles, such as Virgin Orbit’s LauncherOne. Concurrently, another indicator of small satellite proliferation are recent announcements of increased rideshare opportunities by large launch vehicle operators. As numerous dedicated and rideshare launches emerge as solutions for small satellite customers, understanding the relative advantages and performance of these vehicles will be crucial to satisfy not only single launch, but broader architectural mission needs. Virgin Orbit and VOX Space have presented how a responsive air-launched architecture with multiple hosting spaceports and modularized systems at each can be leveraged to launch entire constellations within days. We have since continued to grow our spaceport network to support domestic and international mission planners that desire a launch vehicle that isn’t constrained to a permanent fixed site or departure corridor. Building upon that work, new analytical methods to analyze and communicate the advantages of air-launch from spaceports around the globe have been devised. Specifically we will quantitatively show how commercial and national security missions, especially in an era that require hybrid architectures, are improved with a geographically flexible and distributed launch capability. Tens of thousands of launches from unique sites are simulated to support various mission types. The result is an explicit evaluation of how the flexibility, ease-of-access, and unconstrained orbital inclination ranges of a global launch network can support hybrid system needs in ways that no other comparable launch system can, dedicated or otherwise.

Published
2020

40. Cover Image

Author

Yang, Lei, primary, Yang, Di, additional, Wu, Yang, additional, Li, Yu, additional, Liao, Ren, additional, and Zuo, Yunxia, additional

Published
2021
Full Text
View/download PDF

42. Phylogenomics and biogeography of Wisteria: Implications on plastome evolution among inverted repeat‐lacking clade (IRLC) legumes.

Author

Xia, Mao‐Qin, Liao, Ren‐Yu, Zhou, Jin‐Ting, Lin, Han‐Yang, Li, Jian‐Hua, Li, Pan, Fu, Cheng‐Xin, and Qiu, Ying‐Xiong

Subjects
*VICARIANCE, *DECIDUOUS forests, *ORNAMENTAL plants, *BIOGEOGRAPHY, *TEMPERATE forests
Abstract

The genus Wisteria (Fabaceae) is disjunctly distributed in eastern Asian and eastern North American temperate deciduous forests, and it is widely cultivated around the world as spectacular garden plants. It is a member of inverted repeat‐lacking clade (IRLC). The IRLC Species are characterized by the loss of an IR region in their plastomes, which has long been of great interest. In this research, we report whole plastome sequences from all four Wisteria species and a Wisteriopsis japonica, combining these with existing data to explore phylogenetic relationships and biogeography of Wisteria, as well as plastome evolution of IRLC species. Phylogenetic analyses recognized a clade containing Glycyrrhiza–Wisteriopsis–Wisteria as sister to the remaining genera of IRLC. North American Wisteria frutescens and the three Asian species formed reciprocal clades, and Wisteria brachybotrys was sister to Wisteria floribunda and Wisteria sinensis. Wisteria may have originated in Japan near the boundary of the Oligocene and Miocene. The disappearance of Bering Land Bridge in the late Miocene might lead to the Eastern Asian–Eastern North American disjunction of Wisteria. Allopatric speciation of Wisteria between the Japanese archipelago and the Asian continent in the Quaternary increased the species richness of eastern Asia in comparison with eastern North America. Synonymous substitution rates (dS) of protein‐coding genes in the IRLC species were around 2‐fold (SC genes) or 11‐fold (IR genes) higher than those of non‐IRLC species. For both SC and IR genes, herbaceous legumes have around 3‐fold higher dS than woody ones. Both loss of one IR region and herbaceous habit elevated substitution rates of the plastomes. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

48. Individualized Red-Cell Transfusion Strategy for Non-Cardiac Surgery in Adults: A Randomised Controlled Trial

Author

Liao, Ren, primary, Liu, Jin, additional, Zhang, Wei, additional, Zheng, Hong, additional, Zhu, Zhaoqiong, additional, Sun, Haorui, additional, Yu, Zhangsheng, additional, Jia, Huiqun, additional, Sun, Yanyuan, additional, Qin, Li, additional, Yu, Wenli, additional, Luo, Zhen, additional, Chen, Yanqing, additional, Zhang, Kexian, additional, Ma, Lulu, additional, Yang, Hui, additional, Wu, Hong, additional, Liu, Limin, additional, Yuan, Fang, additional, Xu, Hongwei, additional, Zhang, Jianwen, additional, Zhang, Lei, additional, Liu, Dexing, additional, and Huang, Han, additional

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results