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| 1 | Constrained large-eddy simulation and detached eddy simulation of flow past a commercial aircraft at 14 degrees angle of attack显示文摘With the development of computational power and numerical algorithms,computational fluid dynamics(CFD) has become an important strategy for the design of aircraft,which significantly reduces the reliance on wind-tunnel and flight tests.In this paper,we conducted a numerical investigation on the flow past a full commercial aircraft at Mach number 0.2 and 14 degrees angle of attack by means of Reynolds-averaged Navier-Stokes(RANS),detached-eddy simulation(DES) and our newly developed constrained large-eddy simulation(CLES).The objective of this paper is to study the capability of these models in simulating turbulent flows.To our knowledge,this is the first large-eddy simulation method for full commercial aircraft simulation.The results show that the CLES can predict the mean statistical quantities well,qualitatively consistent with traditional methods,and can capture more small-scale structures near the surface of the aircraft with massive separations.Our study demonstrates that CLES is a promising alternative for simulating real engineering turbulent flows. | CHEN ShiYi CHEN YingChun XIA ZhenHua QU Kun SHI YiPeng XIAO ZuoLi LIU QiuHong CAI QingDong LIU Feng LEE Cunbiao ZHANG RiKui CAI JinSheng | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，2： | 14 |
| 2 | Hypoxia-induced factor-1 alpha upregulates vascular endothelial growth factor C to promote lymphangiogenesis and angiogenesis in breast cancer patients显示文摘Hypoxia-induced factor-1 alpha(HIF-1α)affects many effector molecules and regulates tumor lymphangiogenesis and angiogenesis during hypoxia.The aim of this study was to investigate the role of HIF-1αin the regulation of vascular endothelial growth factor C(VEGF-C)expression and its effect on lymphangiogenesis and angiogenesis in breast cancer.Lymphatic vessel density(LVD),microvessel density(MVD)and the expressions of HIF-1αand VEGF-C proteins were evaluated by immunohistochemistry in 75 breast cancer samples.There was a significant correlation between HIF-1αand VEGF-C(P=0.014,r=0.273,Spearman's coefficient of correlation).HIF-1αand VEGF-C overexpression was significantly correlated with higher LVD(P=0.003 and P=0.017,respectively),regional lymph nodal involvement(P=0.002 and P=0.004,respectively)and advanced tumor,node,metastasis(TNM)classification(P=0.001 and P=0.01,respectively).Higher MVD was observed in the group expressing higher levels of HIF-1αand VEGF-C(P=0.033 and P=0.037,respectively).Univariate analysis showed shorter survival time in patients expressing higher levels of HIF-1αand VEGF-C.HIF-1αwas also found to be an independent prognostic factor of overall survival in multivariate analysis.The results suggest that HIF-1αmay affect VEGF-C expression,thus acting as a crucial regulator of lymphangiogenesis and angiogenesis in breast cancer.This study highlights promising potential of HIF-1αas a therapeutic target against tumor lymph node metastasis. | Xiaojian Ni Yingchun Zhao Jingjing Ma Tiansong Xia Xiaoan Liu Qiang Ding Xiaoming Zha Shui Wang | 2013 | The Journal of Biomedical Research2013，27，6： | 10 |
| 3 | A Model Output Machine Learning Method for Grid Temperature Forecasts in the Beijing Area显示文摘In this paper, the model output machine learning (MOML) method is proposed for simulating weather consultation, which can improve the forecast results of numerical weather prediction (NWP). During weather consultation, the forecasters obtain the final results by combining the observations with the NWP results and giving opinions based on their experience. It is obvious that using a suitable post-processing algorithm for simulating weather consultation is an interesting and important topic. MOML is a post-processing method based on machine learning, which matches NWP forecasts against observations through a regression function. By adopting different feature engineering of datasets and training periods, the observational and model data can be processed into the corresponding training set and test set. The MOML regression function uses an existing machine learning algorithm with the processed dataset to revise the output of NWP models combined with the observations, so as to improve the results of weather forecasts. To test the new approach for grid temperature forecasts, the 2-m surface air temperature in the Beijing area from the ECMWF model is used. MOML with different feature engineering is compared against the ECMWF model and modified model output statistics (MOS) method. MOML shows a better numerical performance than the ECMWF model and MOS, especially for winter. The results of MOML with a linear algorithm, running training period, and dataset using spatial interpolation ideas, are better than others when the forecast time is within a few days. The results of MOML with the Random Forest algorithm, year-round training period, and dataset containing surrounding gridpoint information, are better when the forecast time is longer. | Haochen LI Chen YU Jiangjiang XIA Yingchun WANG Jiang ZHU Pingwen ZHANG | 2019 | Advances in Atmospheric Sciences2019，36，10： | 9 |
| 4 | Adjustment Model and Algorithm Based on Ellipsoid Uncertainty显示文摘In surveying adjustment models,there is usually some uncertain additional information or prior information on parameters,which can constrain the parameters,and guarantee the uniqueness and stability of parameter solution.In this paper,we firstly use ellipsoidal sets to describe uncertainty,and establish a new adjustment model with ellipsoidal uncertainty.Furthermore,we give a new adjustment criterion based on minimization trace of an outer ellipsoid with two ellipsoid intersections,and analyze the propagation law of uncertainty.Correspondingly,we give a new algorithm for the adjustment model with ellipsoid uncertainty.Finally,we give three examples to test and verify the effectiveness of our algorithm,and illustrate the relation between our result and the weighted mixed estimation. | Yingchun SONG Yuguo XIA Xuemei XIE | 2020 | Journal of Geodesy and Geoinformation Science2020，3，3： | 7 |
| 5 | A Comparative Study on the Separating Methods of Al,Ca and Mg Based on Theoretical Energy Consumption显示文摘Based on thermodynamics and physical chemistry theory,the theoretical energy consumption (TEC) of the typical separating processes of Al,Ca and Mg has been calculated and analyzed.This paper attempts to prove that the thermal method is more reasonable than the electrolytic methods to separate Al,Ca and Mg under the domestic circumstances of the low efficiency of coal-firing power plant at present. | Dehong XIA Yingchun SHANG Ling REN | 2011 | Journal of Thermal Science2011，20，1： | 3 |
| 6 | A thermoresponsive composite separator loaded with paraffin@SiO_(2) microparticles for safe and stable lithium batteries显示文摘Lithium-ion batteries (LIBs)-related accidents have been reported for years and safety issues are stumbling blocks for the practical applications of lithium metal batteries (LMBs) with higher energy density. More effective strategies to shut down the battery at the early stage of thermal runaway with less side effects on the electrochemical performance are greatly desired. In this work, the core–shell structural paraffin@SiO_(2) microparticles were synthesized by in situ emulsion interfacial hydrolysis and polycondensation and the paraffin@SiO_(2)-loaded separator (PSS) was prepared by a facile filtration method. The introduction of hydrophilic silica shells in paraffin@SiO_(2) enhanced the wettability of carbonate electrolyte with the composite separator and improved the processability of soft paraffin. As a result, when used in LMBs at room temperature, the cell with PSS inside had a more uniform deposition of lithium, a much lower overpotential and a more stable electrochemical performance than the cell with the blank separator or the conventional pure paraffin-loaded separator inside. More significantly, when a heating stimulation (i.e. 115 ℃) was subjected to the cell with PSS inside, the paraffin in the core of paraffin@SiO_(2) could be released, blocking the gaps between particles and the pores in the separator and efficiently stopping the transportation of Li+ between two electrodes, resulting in the thermally-induced shutdown of the cell below the melting temperature of PE (~135 ℃) in the Celgard2325 separator. The core–shell structure of paraffin@SiO_(2) enables the maintaining of each component’s benefits while avoiding each one’s drawbacks by elaborating microstructural design. Therefore, the conventional dilemma between the electrochemcial performance and safety of LMBs could be solved in the future. | Hao Dong Peican Wang Shuaishuai Yan Yingchun Xia Baoguo Wang Xiaolin Wang Kai Liu | 2021 | Journal of Energy Chemistry2021，30，11： | 3 |
| 7 | Speech interaction with a rat显示文摘This paper presents the first report of a system of human's speech interaction with rats via integration of brain–machine interfaces and automatic speech recognition technologies. We propose a novel human–rat speech interaction paradigm by incorporating speech translator module, which translates human's speech commands into suitable electrical brain stimulation to steer the rat to induce expected locomotor behaviors. The preliminary results show that we can guide a rat's movement by speech commands. We further look into the future application scenarios together with forthcoming challenges facing this newly evolved cyborg intelligent system. This work will pave the way for natural interaction with animal robots. | Zhaohui Wu Yingchun Yang Bingchao Xia Zhenchuan Zhang Gang Pan | 2014 | Chinese Science Bulletin2014，59，28： | 2 |
| 8 | Regulating the growth of lithium dendrite by coating an ultra-thin layer of gold on separator for improving the fast-charging ability of graphite anode显示文摘With the ever-growing application of lithium-ion batteries(LIBs), their fast-charging technology has attracted great interests of scientists. However, growth of lithium dendrites during fast charge of the bat teries with high energy density may pose great threats to the operation and cause serious safety issues Herein, we prepared a functional separator with an ultra-thin(20 nm) layer of Au nanoparticles deposited by evaporation coating method which could regulate growth direction and morphology of the lithium dendrites, owing to nearly zero overpotential of lithium meal nucleation on lithiated Au. Once the Li den drites are about to form on the graphite anode during fast charging(or lithiation), they plate predomi nantly on the Au deposited separator rather than on the graphite. Such selective deposition does no compromise the electrochemical performance of batteries under normal cycling. More importantly, i enables the better cycling stability of batteries at fast charge condition. The Li/Graphite cells with Au nanoparticles coated separator could cycle stably with a high areal capacity retention of 90.5% over 95 cycles at the current density of 0.72 m A cm^(-2). The functional separator provides an effective strategy to adjust lithium plating position at fast charge to ensure high safety of batteries without a compromise on the energy density of LIBs. | Shuaishuai Yan Xiaoxia Chen Pan Zhou Peican Wang Hangyu Zhou Weili Zhang Yingchun Xia Kai Liu | 2022 | Journal of Energy Chemistry2022，31，4： | 2 |
| 9 | Synthesis and characterization of a novel MPEG–chitosan diblock copolymer and self-assembly of nanoparticles显示文摘 | XiangYe Kong XingYi Li XiuHong Wang TingTing Liu YingChun Gu Gang Guo Feng Luo Xia Zhao YuQuan Wei ZhiYong Qian | 2009 | Carbohydrate Polymers2009，，1： | 1 |
| 10 | Coupling simulation algorithm of a rotating flat-plate blade with particle dampers under centrifugal forces显示文摘 | Xia Zhaowang Liu Xiandong Shan Yingchun | 2011 | Journal of Vibration and Acoustics Transactions of the ASME2011，133，4： | 1 |
| 11 | Coupling simulation algorithm of discrete element method and finite element method for particle damper显示文摘 | Xia Zhaowang Liu Xiandong Shan Yingchun | 2009 | Journal of Low Frequency Noise Vibration and Active Control2009，28，3： | 1 |
| 12 | Theoretical energy consumption analytical method for metal separation process显示文摘The theoretical energy consumption(TEC)analytical methods and the calculated models for the electrolytic and thermal reduction metal separation processes have been put forward based on thermodynamics and physical chemistry principles,providing theoretical foundation for choosing the optimum metal separation methods.Based on the models,the TECs of the Mg separation processes are taken as an example,and have been calculated and analyzed contrastively,including the MgCl_2 electrolytic method,the MgO electrolytic method with inert electrode and with carbon anode,and the silicothermic method.It is shown that the thermal method is more reasonable than the electrolytic methods to separate Mg under low efficiency of coal power generation. | Dehong XIA,Yingchun SHANG,Ling REN and Yifan LI Department of Thermal Engineering,University of Science and Technology Beijing,Beijing 100083 | 2010 | Journal of Thermal Science2010，19，4： | 1 |
| 13 | Zwitterionic Matrix with Highly Delocalized Anionic Structure as an Efficient Lithium Ion Conductor显示文摘The leakage and volatilization of liquid electrolytes raise potential safety risks in the development of electrochemical energy storage devices with high energy density.Herein,novel solid-state zwitterionic materials containing sulfonyl imide as a highly delocalized anionic structure were synthesized for highly targeted lithium ion conducting matrices.The influences of the molecular structure characteristics on thermal behavior and electrochemical property were investigated comprehensively.Due to the weak Coulomb interaction between the sulfonyl imide moiety and cationic species,the rationally designed zwitterionic electrolytes showed a high conductivity of 0.44 mS cm^(-1).And the obtained high lithium ion transference number of 0.43 is four times higher than that of the widely employed sulfonate analogues.Additionally,excellent cycling stability of the lithium plating/stripping process and super resistance to electrochemical oxidation(up to 5.5 V)were observed.This molecular engineering strategy for lithium ion conductor advances new possibilities for developing solvent-free and non-migrating electrolyte matrix materials for lithium metal batteries. | Shuaishuai Yan Yang Lu Fengxiang Liu Yingchun Xia Qiao Li Kai Liu | 2023 | CCS Chemistry2023，5，7： | 0 |
| 14 | Metatranscriptomic analysis of host response and vaginal microbiome of patients with severe COVID-19显示文摘Dear Editor,The pandemic of coronavirus disease 2019(COVID-19)caused by severe acute respiratory syndrome coronavirus 2(SARS-Co V-2)has become a global public health threat.Here we use a TRACE-seq-based metatranscriptomic analysis to compare host responses and vaginal microbiome of postmenopausal female patients with underlying severe COVID-19 disease with those of healthy females,thereby providing insights into the changes in the microenvironment of women's reproductive system. | Meng Xiao Bo Lu Rui Ding Xia Liu Xian Wu Yaqian Li Xudong Liu Lin Qiu Zhibo Zhang Jing Xie Yu Chen Dong Zhang Liting Dong Meiling Zhang Jinying Peng Hua Yang Timothy Kudihna Yingchun Xu Taisheng Li Chengqi Yi Lan Zhu | 2022 | Science China(Life Sciences)2022，65，7： | 0 |
| 15 | Cross-Coupling Correction for LaCoste & Romberg Airborne Gravimeter显示文摘为 LaCoste 和 Romberg 的跨 coupling 修正在空中的比重计作为 5 个所谓的跨 coupling 监视器的一个线性组合被计算。由工厂从海洋的严肃数据决定的重量因素(系数) 显然不为在空中的申请是最佳的。这些系数被最小化在空中的数据和向上的继续的表面数据(外部刻度) 之间并且由分别地在线十字路口(内部刻度) 最小化错误的差别重新校准。重新校准的一个集成的方法上述系数和横梁规模因素也同时被介绍。试验性的结果证明在在空中的严肃异例的全身的错误能被使用任何重新校准的系数极大地减少。例如,全身的错误从 4.8 mGalto 被减少在 Datongtest 的 1.8 mGal。 | SUN Zhongmiao XIA Zheren LI Yingchun | 2007 | Geo-Spatial Information Science2007，10，3： | 0 |
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