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One-year survey of opportunistic premise plumbing pathogens and free-living amoebae in the tap-water of one northern city of China

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Journal of Environmental Sciences 2019年第3期31卷 20-31页

作者： Lizhong Liu Xueci xing Chun hu Haibo Wang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Institute of Environmental Research at Greater Bay Guangzhou University

In this study, qPCR was used to quantify opportunistic premise plumbing pathogens(OPPPs) and free-living amoebae in 11 tap water samples collected over four seasons from a city in northern China. Results demonstrated that the average numbers of gene copies of Legionella spp. and Mycobacterium spp. were significantly higher than those of Aeromonas spp.(p 0.05). Moderate negative correlations between the chlorine concentration and the gene copy numbers of OPPPs were observed by Spearman analysis(rsranged from -0.311 to -0.710, p < 0.05). However, no significant correlations existed between OPPPs and AOC, BDOC, or turbidity. Moderate positive correlations were observed between the target microorganisms, especially for Acanthamoeba spp., through Spearman analysis(p < 0.05). Based on our studies, it is proposed that disinfectant concentration, season, taps with different-use frequency, OPPP species, and potential microbial correlations should be considered for control of OPPPs in tap water.

关键词： Opportunistic premise plumbing pathogens(OPPPs) Free-living amoebae(FLA) Drinking water distribution systems(DWDS) Tap-water Quantitative PCR(qPCR)

Study of singly anti-charmed pentaquark production in b-factory

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Chinese Physics C 2024年第12期48卷 63-72页

作者： Xiao-hui hu Ye xing The College of Materials and physics China University of mining and technologyXuzhou 221116China Lanzhou Center for Theoretical Physics and Key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China

The b-factories,such as BelleII,BarBar,and LHCb,emphasize the increasing importance of exotic hadron *** this paper,we discuss the possible production of singly anti-charmed pentaquark states cqqqq from B mesons in a b-factory under SU(3)symmetry *** of both possibilities have been driven by the hypothesis that the pentaquark state considered in this work,known as the lowest lying state P_(c),could be bound or *** find the golden channels for the production of the pentaquark ground states,such as B^(0)→P_(csudu)^((′)0)Σ^(0).We further estimate the branching ratios for the production of the ground states P_(c) from B meson ***,multiple channels are available for experiments,which may remove certain obstacles to the discovery of new pentaquark states.

关键词： singly anti-charmed pentaquark ground state the production topographies the b-factories the branching ratios SU(3)symmetry analysis

Flow-aware synthesis: A generic motion model for video frame interpolation

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Computational Visual Media 2021年第3期7卷 393-405页

作者： Jinbo xing Wenbo hu Yuechen Zhang Tien-Tsin Wong Department of Computer Science and Engineering the Chinese University of Hong KongHong Kong SARChina Shenzhen Key Laboratory of Virtual Reality and human Interaction Technology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesChina

A popular and challenging task in video research,frame interpolation aims to increase the frame rate of *** existing methods employ a fixed motion model,e.g.,linear,quadratic,or cubic,to estimate the intermediate warping ***,such fixed motion models cannot well represent the complicated non-linear motions in the real world or rendered ***,we present an adaptive flow prediction module to better approximate the complex motions in ***,interpolating just one intermediate frame between consecutive input frames may be insufficient for complicated non-linear *** enable multi-frame interpolation,we introduce the time as a control variable when interpolating frames between original ones in our generic adaptive flow prediction *** and quantitative experimental results show that our method can produce high-quality results and outperforms the existing stateof-the-art methods on popular public datasets.

关键词： flow-aware generic motion model video frame interpolation

Synthesis and Characterization of Zirconia Nanocrystallites by Cationic Surfactant and Anionic Surfactant

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1133-1139页

作者： YU Jian-chang hu Sheng-Wei College of Material Science and Engineering Fuzhou University Fuzhou 350002 China

Study on nanomaterials has attracted great interests in recent years. In this article, zirconia nanocrystallites of different structures have been successfully synthesized via hydrothermal methods with cationic surfactant （CTAB） and anionic surfactant （SDS）, respectively. Differential Scanning Calorimeter （DSC-TG）, X-ray Diffractometer （XRD）, Transmission Electron Microscope （TEM）, Ultraviolet-Visible （UV-vis） and N2 adsorption-desorption analyses are used for their structure characteristics. The results show that the cationic surfactant has a distinctive direction effect on the formation of zirconia nanocrystallites, while the anionic surfactant has a self-assembly synergistic effect on them. The sample synthesized with the cationic surfactant presents good dispersion with the main phase of tetragonal zirconia, and the average nanocrystal size is around 15 nm after calcination at 500 ℃. While the sample synthesized with the anionic surfactant exhibits a worm-like mesoporous structure with pure tetragonal phase after calcination at 500 ℃ and with good thermal stability.

关键词： cationic surfactant anionic surfactant zirconia nanocrystallites,mesoporous zirconia

The Payouts Choice for Deposit Insurance System

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Journal of Systems Science & Complexity 2019年第5期32卷 1404-1425页

作者： chang Yiming ZHAO Shangmei hu Fei School of Economics and Management Beihang UniversityBeijing 100191China Institute of Market and Price National Development and Reform CommissionBeijing 100038China.

Entropy balancing is introduced to assess the deposit insurance design characteristics in this paper. Applying an extensive duration data including 141 countries from 1960 to 2015, the authors employ the entropy balancing method to simulate the data structure under the implicit deposit insurance system. Then the paper adopts an endogenous treatment effects model and a Heckman two-step selection model to examine payouts choice of the deposit insurance. It is found that entropy balancing can calibrate unit weights and reweight treatment and control groups by a maximum entropy ***, a possibly given conditions will be satisfied and information concerning sample moments will be integrated. The results show clearly that different payouts choice and the corresponding coverage setting can effectively reduce the moral hazards that may result from the introduction of a deposit insurance scheme. When the Payouts is Per Depositor Account or Per Depositor, the banks’ moral hazard is higher. However, the payment method of Per Depositor Per Institution can effectively restrain the banks’ risk-taking activities.

关键词： Deposit insurance entropy balancing payouts choice treatment effects

In-Plane Semi-Linear Cloaks with Arbitrary Shape

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Acta Mechanica Solida Sinica 2019年第3期32卷 277-286页

作者： Dengke Guo Zheng chang Gengkai hu Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of Education School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China College of Science China Agricultural University Beijing 100083 China

Soft materials with semi-linear strain energy function can be used as smart transformation media to manipulate elastic waves via finite pre-deformation. However, the intrinsic cons train ts involved in such materials limit the shapes of t ransformation devices to very sim - pie cases. In this work, combining theoretical and numerical analyses, we report an approach of achieving the in-plane elastodynamic cloak with arbitrary shape. We demonstrate that with the appropriate out-of^plane st retch applied on the semi-linear material, cloaking effec t can be achieved for both P- and SV-waves in the symmetrie plane of a 3D domain, and the performance of the cloak with arbitrary cross section can be guaranteed for relatively small in-plane rot at ion. In addition, we propose an empirical formula to predic t the deformation limit of the cloaks with semi-linear materials. This work may stimulate the experimental research on softmatter- based transformation devices. Potential applications can be anticipated in nondestructive testing, structure impact protection, biomedical imaging and soft robotics.

关键词： Elastic waves Cloak Hyperelasticity Semi-linear Arbitrary shape

HEAT FLOW CONTROL BY TRANSFORMATION METHOD WITH GRID GENERATION METHOD

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Acta Mechanica Solida Sinica 2014年第5期27卷 454-460页

作者： Zheng chang Xiaoning Liu Gengkai hu Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of Education School of Aerospace Engineering Beijing Institute of Technology CNMM & AML Department of Engineering Mechanics Tsinghua University

In the context of the transformation method, we propose a general approach to construct numerically the mapping generated by imposing specific boundary conditions with a targeted function, and the necessary material and heat source spatial distributions are then derived with the help of transformation method. The construction of mapping by grid generation method through solving partial differential equations circumvents the limitation of device geometry, which paves the way for designing more complex heat flow control devices. Two numerical examples are also given to show how to design material properties and heat source in order to control temperature patterns.

关键词： heat conduction inverse problem transformation method grid generation

Computer Simulation of Sputtering and Atomic Redistribution in Hg_(0.8)Cd_(0.2)Te Targets Under Ar^(+) Ions Bombardment

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Chinese Physics Letters 1994年第11期11卷 717-720页

作者： xing Yuelin XIA Yueyuan hu Xierong Department of Physics Shandong UniversityJi’nan 250100 Institute of Infrared Remote Sensing Shandong UniversityJi’nan 250100

The sputtering of Hg_(0.8)Cd_(0.2)Te target by low energy Ar^(+)ions has been simulated using Monte Carlo *** simulation results show that the concentration of Hg in the surface region of the target after ion bombardment is lower than the one before ion bombardment,but in a deeper region an excess concentration of Hg is produced due to recoil *** excess concentration of Hg there may act as a donor dopant diffusion source for over doping the acceptor levels in the adjacent region and turn the p-type Hg_(0.8)Cd_(0.2)Te into an n-type material.

关键词： material. method.

Enhancing m^(6)A modification in the motor cortex facilitates corticospinal tract remodeling after spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1749-1763页

作者： Tian Qin Yuxin Jin Yiming Qin Feifei Yuan Hongbin Lu Jianzhong hu Yong Cao Chengjun Li Department of Spine Surgery and Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Key Laboratory of Organ Injury Aging and Regenerative Medicine of Hunan ProvinceChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Sports Medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Spinal cord injury typically causes corticospinal tract disruption. Although the disrupted corticospinal tract can self-regenerate to a certain degree, the underlying mechanism of this process is still unclear. N6-methyladenosine(m^(6)A) modifications are the most common form of epigenetic regulation at the RNA level and play an essential role in biological processes. However, whether m^(6)A modifications participate in corticospinal tract regeneration after spinal cord injury remains unknown. We found that expression of methyltransferase 14 protein(METTL14) in the locomotor cortex was high after spinal cord injury and accompanied by elevated m^(6)A levels. Knockdown of Mettl14 in the locomotor cortex was not favorable for corticospinal tract regeneration and neurological recovery after spinal cord injury. Through bioinformatics analysis and methylated RNA immunoprecipitation-quantitative polymerase chain reaction, we found that METTL14 regulated Trib2 expression in an m^(6)A-regulated manner, thereby activating the mitogen-activated protein kinase pathway and promoting corticospinal tract regeneration. Finally, we administered syringin, a stabilizer of METTL14, using molecular docking. Results confirmed that syringin can promote corticospinal tract regeneration and facilitate neurological recovery by stabilizing METTL14. Findings from this study reveal that m^(6)A modification is involved in the regulation of corticospinal tract regeneration after spinal cord injury.

关键词： corticospinal tract remodeling epigenetic regulations locomotor cortex m^(6)A modification methyltransferase 14 protein(METTL14) mitogen-activated protein kinase neural regeneration spinal cord injury syringin TRIB2