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Graphene-immobilized flower-like Ni3S2 nanoflakes as a stable binder-free anode material for sodium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2018年第1期25卷 88-93页

作者： Yu Han Shuang-yu liu Lei Cui li Xu jian Xie Xue-Ke Xia Wen-kui Hao Bo Wang Hui li Jie Gao State Key Laboratory of Advanced Transmission Technology Global Energy lnterconnection Research InstituteBeijing 102211China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

A binder-free Ni3S2 electrode was prepared directly on a graphene-coated Ni foam （G/Ni） substrate through surface sulfiding of substrate using thiourea as the sulfur source in this work. The Ni3S2 showed a flower-like morphology and was uniformly distributed on the G/Ni surface. The flower-like Ni3S2 was composed of cross-arrayed nanoflakes with a diameter and a thickness of 1-2 μm and -50 nm, re- spectively. The free space in the flowers and the thin feature of Ni3S2 buffered the volume changes and relieved mechanical strain during re- peated cycling. The intimate contact with the Ni substrate and the fixing effect of graphene maintained the structural stability of the Ni3S2 electrode during cycling. The G/Ni-supported Ni3S2 maintained a reversible capacity of 250 mAh·g^-1 after 100 cycles at 50 mA·g^-1, demon- strating the good cycling stability as a result of the unique microstructure of this electrode material.

关键词： graphene Ni3S2 nanoflakes sodium-ion battery electrochemical performance

Hot deformation behavior and microstructure evolution of an Fe–30Cr–2Mo ultra-pure super ferritic stainless steel

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Journal of Iron and Steel Research International 2021年第10期28卷 1291-1304页

作者： Yang-yang Zhu li-kui Ning Tong-zheng Xin En-ze liu jian Tong Zheng Tan Yang-tao Zhou Zhi Zheng Institute of Metal Research Chinese Academy of SciencesShenyang110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016LiaoningChina School of Materials Science and Engineering University of New South WalesSydneyNSW2052Australia

The hot deformation behavior and microstructure evolution of an Fe–30Cr–2Mo ultra-pure super ferritic stainless steel were investigated at the temperature range of 950–1150℃ and strain rate varying from 0.01 to 10 s^(−1).A strain compensated constitutive equation based on the Arrhenius-type model was established to predict the flow *** hot processing map based on the dynamic materials model was achieved to identify the optimum processing *** addition,the features of microstructure evolution combined with the processing map were systematically *** experimental results revealed that the flow stress increased with decreasing deformation temperature or increasing strain *** recovery was confirmed to be the predominant softening *** values of flow stress predicted by the strain compensated constitutive equation agreed well with the experimental *** extent of dynamic recrystallization and recrystallized grain size increased with increasing deformation temperature or decreasing strain rate,and the continuous dynamic recrystallization was attributed to be the predominant mechanism of recrystallization during hot *** optimum hot working parameters were determined to be the deformation temperature of 1070–1150℃ and strain rate of 0.1–1 s^(−1) with a peak power dissipation efficiency of 42%.

关键词： Super ferritic stainless steel Hot compression Constitutive equation Processing map Microstructure evolution

Stationary and moving solitons in spin-orbit-coupled spin-1 Bose-Einstein condensates

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Frontiers of physics 2018年第2期13卷 31-37页

作者： Yu-E li Ju-kui Xue Key Laboratory of Atomic Molecular Physics Functional Materials of Gansu Province College of Physics and Electronic Engineering Northwest Normal University Lanzhou 730070 China

We investigate the matter-wave sohtons in a spin-orbit-coupled spin-1 Bose-Einstein condensate us- ing a multiscale perturbation method. Beginning with the one-dimensional spin-orbit-coupled three- component Gross-Pitaevskii equations, we derive a single nonlinear SehrSdinger equation, which allows determination of the analytical soliton solutions of the system. Stationary and moving solitons in the system are derived. In particular, a parameter space for different existing soliton types is provided. It is shown that there exist only dark or bright sohtons when the spin-orbit coupling is weak, with the solitons depending onthe atomic interactions. However, when the spin-orbit coupling is strong, both dark and bright solitons exist, being determined by the Raman coupling. Our analytical solutions are confirmed by direct numerical simulations.

关键词： spin-orbit coupling Bose-Einstein condensate soliton perturbation method

Development and application of a two-dimensional water quality model for the Daqinghe River Mouth of the Dianchi Lake

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Journal of Environmental Sciences 2009年第3期21卷 313-318页

作者： CHEN Qiuwen TAN kui ZHU Chuanbao li Ruonan Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Hydrological Bureau Ministry of Water Resources Beijing 100022 China

Water quality models are important tools to support the optimization of aquatic ecosystem rehabilitation programs and assess their efficiency. Basing on the flow conditions of the Daqinghe River Mouth of the Dianchi Lake, China, a two-dimensional water quality model was developed in the research. The hydrodynamics module was numerically solved by the alternating direction iteration （ADI） method. The parameters of the water quality module were obtained through the in situ experiments and the laboratory analyses that were conducted from 2006 to 2007. The model was calibrated and verified by the observation data in 2007. Among the four modelled key variables, i.e., water level, COD （in CODcr）, NH4＋-N and PO43-P the minimum value of the coefficient of determination （COD） was 0.69, indicating the model performed reasonably well. The developed model was then applied to simulate the water quality changes at a downstream cross-section assuming that the designed restoration programs were implemented. According to the simulated results, the restoration programs could cut down the loads of COD and PO43-P about 15%. Such a load reduction, unfortunately, would have very little effect on the NH4^＋-N removal. Moreover, the water quality at the outlet cross-section would be still in class V （3838-02）, indicating more measures should be taken to further reduce the loads. The study demonstrated the capability of water quality models to support aquatic ecosystem restorations.

关键词： two-dimensional water quality model parameter estimation restoration program evaluation Dianchi Lake

Icariin suppresses bone resorption activity of rabbit osteoclasts in vitro

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Chinese Science Bulletin 2007年第7期52卷 890-895页

作者： HUANG jian ZHANG JinChao ZHANG TianLan WANG kui Department of Chemical Biology Peking University School of Pharmaceutical Sciences Beijing 100083 China Department of Chemistry College of Chemistry and Environmental Science Hebei University Baoding 071002 China Department of Chemical Biology Capital Medical University School of Pharmaceutical Sciences Beijing 100069 China

The effect of icariin on the bone resorption activity of rabbit osteoclasts is assessed in vitro. Osteoclasts were isolated from Japanese white rabbits and cultured on plates with a sterilized bone slice in each well. After treatment with icariin at various concentrations, the bone resorption activity of osteoclasts was evaluated by examining pit areas, superoxide anion (·O2-) generation, size and number of actin rings and intracellular calcium concentration [Ca2+]i. As revealed by these data, icariin elicited continuous decline of [Ca2+]i, making actin ring constricted and ·O2- generation decreased. These events resulted in smaller and fewer pits which indicate suppressed bone resorption activity of rabbit osteoclasts by icariin.

关键词：淫羊藿苷家兔破骨细胞骨骼吸收活性抑制作用

High-brightness photo-injector with standing-wave buncher-based ballistic bunching scheme for inverse Compton scattering light source

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Nuclear Science and Techniques 2022年第4期33卷 51-61页

作者： jian-Xin Wang kui Zhou Peng li De-Xin Xiao li-Jun Shan Xu-Ming Shen Yu liu Zheng Zhou Han-Bin Wang Dai Wu Institute of Applied Electronics China Academy of Engineering PhysicsMianyang 621900China

We report our recent progress in the design and simulation of a high-brightness S-band photo-injector with a ballistic bunching scheme aimed at driving an inverse Compton scattering(ICS)X-ray *** adding a short standing-wave buncher between the RF gun and first booster in a conventional S-band photo-injector,electron bunches with a 500 pC charge can be compressed to the sub-picosecond level with very limited input RF power and an unchanged basic layout of the *** dynamics analysis indicates that fine tuning of the focusing strength of the gun and linac solenoid can well balance additional focusing provided by the standing wave buncher and generate a well-compensated transverse *** bunching dynamics simulations with different operating conditions of the buncher show that a buncher with more cells and a moderate gradient is suitable for simultaneously obtaining a short bunch duration and low *** a typical case of a 9-cell buncher with a 38 MV/m gradient,an ultrashort bunch duration of 0.5 ps(corresponding to a compression ratio of>5)and a low emittance oflistic bunching scheme will facilitate the implementation of an ultrashort pulse mode inverse Compton scattering X-ray source on most existing S-band photo-injectors.

关键词： Beam brightness Ballistic bunching Emittance compensation Compton scattering X-ray source

Inflammation:A novel target of current therapies for hepatic encephalopathy in liver cirrhosis

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World Journal of Gastroenterology 2015年第41期21卷 11815-11824页

作者： Ming Luo jian-Yang Guo Wu-kui Cao Department of Gastroenterology Ningxia People’s Hospital Tianjin liver Disease Institute Tianjin Second People’s Hospital

Hepatic encephalopathy(HE) is a severe neuropsychiatric syndrome that most commonly occurs in decompensated liver cirrhosis and incorporates a spectrumof manifestations that ranges from mild cognitive impairment to coma. Although the etiology of HE is not completely understood, it is believed that multiple underlying mechanisms are involved in the pathogenesis of HE, and one of the main factors is thought to be ammonia; however, the ammonia hypothesis in the pathogenesis of HE is incomplete. Recently, it has been increasingly demonstrated that inflammation, including systemic inflammation, neuroinflammation and endotoxemia, acts in concert with ammonia in the pathogenesis of HE in cirrhotic patients. Meanwhile, a good number of studies have found that current therapies for HE, such as lactulose, rifaximin, probiotics and the molecular adsorbent recirculating system, could inhibit different types of inflammation, thereby improving the neuropsychiatric manifestations and preventing the progression of HE in cirrhotic patients. The antiinflammatory effects of these current therapies provide a novel therapeutic approach for cirrhotic patients with HE. The purpose of this review is to describe the inflammatory mechanisms behind the etiology of HE in cirrhosis and discuss the current therapies that target the inflammatory pathogenesis of HE.

关键词： Inflammation Hepatic encephalopathy Pathogenesis T

Electrochemical corrosion behavior of 300M ultra high strength steel in chloride containing environment

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Acta Metallurgica Sinica(English Letters) 2010年第4期23卷 301-311页

作者： Min SUN kui XIAO Chaofang DONG Xiaogang li Corrosion and Protection Center School of Material and Engineering University of Science and Technology Beijing Beijing 100083 China

The electrochemical corrosion behavior of 300M ultra high strength steel in chloride containing environment was investigated by potentiodynamic polarization technique, electrochemical impedance spectroscopy （EIS） and scanning electron microscopy （SEM）. The results show that uniform corrosion occurs on 300M steel during the elec- trochemical measurements because no anodic passivation phenomenon is observed on polarization curves within the measurement range. The tests also show that 300M steel is highly susceptible to chloride containing solution, which is characterized by corrosion current density increasing with the addition of chlorides, and corrosion potential shifting towards positive direction and corrosion resistance decreasing, pos- itively suggesting that chloride ions speed up the corrosion rate of 300M steel. Mean- while corrosion products on the 300M steel surface formed during the salt spray test are too loose and porous to effectively slow down the corrosion rate. Additionally, a schematic structure of uniform corrosion mechanism can explain that 300M steel has better property of stress corrosion cracking （SCC） resistance than stainless steels.

关键词： 300M ultra high strength steel Electrochemical corrosion Chloride

The association between retinal vasculature changes and stroke:a literature review and Meta-analysis

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International Journal of Ophthalmology(English edition) 2017年第1期10卷 109-114页

作者： Hui-Qun Wu Huan Wu li-li Shi li-Yuan Yu li-Yuan Wang Ya-Lan Chen Jin-Song Geng jian Shi kui jiang jian-Cheng Dong Department of Medical Informatics Medical School of Nantong UniversityNantong 226001Jiangsu ProvinceChina Nantong University Division of Cooperative Research Centeron Evidence-based Medicine by Ministry of Education inChina Nantong 226001Jiangsu ProvinceChina Department of Ophthalmology Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina

AIM： To determine the association between retinal vasculature changes and ***： MEDliNE and EMBASE were searched for relevant human studies to September 2015 that investigated the association between retinal vasculature changes and the prevalence or incidence of stroke; the studies were independently examined for their qualities. Data on clinical characteristics and calculated summary odds ratios （ORs） were extracted for associations between retinal microvascular abnormalities and stroke, including stroke subtypes where possible, and adjusted for key variables. RESULTS： Nine cases were included in the study comprising 20 659 patients, 1178 of whom were stroke patients. The retinal microvascular morphological markers used were hemorrhage, microaneurysm, vessel caliber, arteriovenous nicking, and fractal dimension. OR of retinal arteriole narrowing and retinal arteriovenous nicking and stroke was 1.42 and 1.91, respectively, indicating that a small-caliber retinal arteriole and retinal arteriovenous nicking were associated with stroke. OR of retinal hemorrhage and retinal microaneurysm and stroke was 3.21 and 3.83, respectively, indicating that retinal microvascular lesions were highly associated with stroke. Results also showed that retinal fractal dimension reduction was associated with stroke （OR： 2.28 for arteriole network, OR： 1.80 for venular network）.CONCLUSION： Retinal vasculature changes have a specific relationship to stroke, which is promising evidence for the prediction of stroke using computerized retinal vessel analysis.

关键词： retinal image vasculature stroke Meta-analysis