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Chinese Journal of Polymer Science 2024年第8期42卷 1185-1197页

作者： Zhi-Ying Zhao Hao Jiang xiao-dong li Xu-dong Zhang Xing Su Mei-Shuai Zou School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

The packaging materials with cushioning performance are used to prevent the internal contents from being damaged by the impact and vibration of external *** polyurethane microcellular elastomers(PUMEs)can absorb energy through cell collapse and molecular chain *** this study,PUMEs with different densities were investigated by scanning electron microscopy,dynamic mechanical analysis and dynamic compression *** exhibited significant im pact resistance and the maximum peak stress attenuation ratio reached 73.33%.The protective equipment was made by PUME with the optimal density of 600 kg/m^(3),and then the acceleration sensing device installed with the same protective equipment fell from a height of 3,5 and 10 m to evaluate the energy-absorbing property and reusability of *** results showed that PUMEs equipment reduced the peak acceleration of the device by 93.84%,with a maximum deviation of 9%between actual test and simulation,and shortened the impact time of first landing by 57.39%.In addition,the equipment PUMEs equipment could effectively reduce the stress on the protected items.

关键词： Polyurethane microcellular elastomer Impact velocity Stress attenuation ratio Impact resistance

Improving constraint onΩ_(m)from SDSS using marked correlation functions

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 207-224页

作者： limin Lai Jiacheng Ding xiaolin Luo Yizhao Yang Zihan Wang Keshi liu Guanfu liu Xin Wang Yi Zheng Zhaoyu li Le Zhang xiao-dong li School of Physics and Astronomy Sun Yat-sen University Zhuhai CampusZhuhai 519082China Department of Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Department of Astronomy Tsinghua UniversityBeijing 100084China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area SYSUZhuhai 519082China Peng Cheng Laboratory Shenzhen 518000China

Large-scale structure(LSS)surveys will increasingly provide stringent constraints on our cosmological ***,the density-marked correlation function(MCF)has been introduced,offering an easily computable density-correlation *** have demonstrated that MCFs offer additional,independent constraints on cosmological models beyond the standard two-point correlation(2PCF).In this study,we apply MCFs for the first time to SDSS CMASS data,aiming to investigate the statistical information regarding clustering and anisotropy properties in the Universe and assess the performance of various weighting schemes in MCFs,and finally obtain constraints onΩ_(m).Upon analyzing the CMASS data,we observe that,by combining different weights(α=[-0.2,0,0.2,0.6]),the MCFs provide a tight and independent constraint on the cosmological parameterΩ_(m),yieldingΩ_(m)=0.293±0.006 at the 1σlevel,which represents a significant reduction in the statistical error by a factor of 3.4 compared to that from *** constraint is consistent with recent findings from the small-scale clustering of BOSS galaxies(Zhai et ***.J.948,99(2023))within the 1σ***,we also find that our estimate is lower than the Planck measurements by about 2.6σ,indicating the potential presence of new physics beyond the standard cosmological model if all the systematics are fully *** method outlined in this study can be extended to other surveys and datasets,allowing for the constraint of other cosmological ***,it serves as a valuable tool for forthcoming emulator analysis on the Chinese Space Station Telescope(CSST).

关键词： large scale structure of universe dark energy cosmological parameters marked weighted correlation function

Regulated reaction pathway of CO_(2)photoreduction into CH_(4)by metal atom pair sites

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Rare Metals 2024年第9期43卷 4620-4627页

作者： dong-Po He Guang-Bing Huang Jun Hu Yang Wu xiao-dong li Qing-Xia Chen Shan Zhu Wen-Sheng Yan Jun-Fa Zhu Yang Pan Xing-Chen Jiao Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Hefei National Research Center for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Max Planck Institute of Microstructure Physics Weinberg 206120 HalleGermany State Grid Anhui Electric Power Research Institute Hefei 230601China

The carbon dioxide(CO_(2))reduction process involves complex protonation,making the resulting product often *** achieve the desired product,it is crucial to manipulate the reaction ***,we build the metal atom pair sites for selective CO_(2)photoreduction into *** a prototype,Ni atom pair sites loaded on the Mo S_(2)nanosheets were synthesized and verified by highresolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS)and X-rayabsorption near edge structure spectra(XANES).In-situ Fourier transform infrared spectroscopy(FTIR)monitors the*CHO group,a crucial intermediate in CH_(4)production,during CO_(2)photoreduction on the Ni-Mo S_(2)nanosheets,whereas this monitoring is not observed for the Mo S_(2)***,theoretical calculations disclose that over the Ni-Mo S_(2)nanosheet slab,the formation energy of*CHO intermediates is determined to be lower(0.585 e V)than the desorption energy of*CO intermediates for CO production(0.64 e V),implying the higher selectivity of CH_(4)production.

关键词： steps dioxide desired

Vasculogenic mimicry:a pivotal mechanism contributing to drug resistance in antiangiogenic therapy

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Oncology and Translational Medicine 2024年第3期10卷 119-125页

作者： Shu-Min Dang Dan Yang Zhi-Yi Wang Xiang-Ming Ding Xiu-ling li De-Yu li dong-xiao li Department of Gastroenterology People’s Hospital of Zhengzhou UniversityHenan Provincial People’s HospitalZhengzhouHenanChina Henan Key Medical Laboratory for Molecular Immunology of Digestive Diseases Henan Provincial People’s HospitalZhengzhouHenanChina Department of Hepatobiliary Surgery People’s Hospital of Zhengzhou UniversityHenan Provincial People’s HospitalZhengzhouHenanChina Henan Provincial Key Medical Laboratory for Hepatobiliary and Pancreatic Diseases Henan Provincial People’s HospitalZhengzhouHenanChina

The growth of solid tumors relies on establishing a robust blood supply,with angiogenesis playing a key role in this intricate *** on this understanding,therapeutic strategies targeting tumor angiogenesis have been ***,the clinical effectiveness of antiangiogenic therapy(AAT)in treating tumors has not lived up to *** recent years,vasculogenic mimicry(VM)has attracted increasing attention from the academic community as a longstanding but often overlooked mechanism of nonangiogenic tumor *** the tumor microenvironment,neoplastic cells can autonomously form vessel-like structures,creating a blood supply that does not rely on endothelial *** phenomenon,known as VM,is a critical marker of aggressive tumors and may play a significant role in conferring resistance to *** this review,we thoroughly examine the evidence,clinical characteristics,and mechanisms of VM across various tumor types and explore its potential role and importance in resistance to AAT and the development of new antitumor therapies.

关键词： Vasculogenic mimicry Antiangiogenic therapy Angiogenesis Tumor microenvironment Immunotherapy

CuO/CeO_(2) p−n异质结光催化降解亚甲基蓝的性能及机理

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Transactions of Nonferrous Metals Society of China 2024年第6期34卷 1951-1964页

作者：陈欢欢罗绍华雷雪飞滕飞纪献兵李晓东东北大学材料科学与工程学院沈阳110819 东北大学秦皇岛分校河北省电介质与电解质功能材料重点实验室秦皇岛066004 河北环境工程学院环境工程系秦皇岛066102

采用简单微波回流法和均相沉淀技术合成CuO/CeO_(2) p−n异质结复合材料,并对其光催化降解亚甲基蓝溶液的性能进行研究。CuO/CeO_(2)异质结复合材料的降解效率明显强于CeO_(2)。结果表明,以Cu/Ce摩尔比为1/3制备的复合材料(1/3 Cu/Ce)的... 详细信息

采用简单微波回流法和均相沉淀技术合成CuO/CeO_(2) p−n异质结复合材料,并对其光催化降解亚甲基蓝溶液的性能进行研究。CuO/CeO_(2)异质结复合材料的降解效率明显强于CeO_(2)。结果表明,以Cu/Ce摩尔比为1/3制备的复合材料(1/3 Cu/Ce)的光催化活性最高,在180 min内降解效率达到96.2%。CuO和CeO_(2)之间形成的p−n异质结促进了光生载流子的分离和传输,从而提高了其光催化活性。计算了CuO/CeO_(2)异质结的能带位置偏移,其价带偏移(∆EVBO)为1.58 eV,导带偏移(∆ECBO)为−0.48 eV。计算结果进一步证明CuO与CeO_(2)之间形成了p−n异质结。

关键词： CuO CeO_(2) p−n异质结光催化机理亚甲基蓝

High throughput bandwidth optimized VLSI design for motion compensation in AVS HDTV decoder

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第6期9卷 822-832页

作者： Kai LUO dong-xiao li Ming ZHANG Department of lnformation Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolation, intensive pixel calculation and huge memory access are required. We propose a parallel serial filtering mixed luma interpolation data flow and a three-stage multiplication free chroma interpolation scheme. Compared to the conventional designs, the integrated architecture supports about 2.7 times filtering throughput. The proposed MC design utilizes Vertical Z processing order for reference data re-use and saves up to 30% memory bandwidth. The whole design requires 44.3k gates when synthesized at 108 MHz clock frequency using 0.18-μm CMOS technology and can support up to 1920×1088@30 fps AVS HDTV video decoding.

关键词： Audio Video coding Standard (AVS) Motion compensation (MC) Interpolation VLSI Architecture

Nano mesocellular foam silica（MCFs）:An effective adsorbent for removing Ni2+ from aqueous solution

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Water Science and Engineering 2019年第4期12卷 298-306页

作者： xiao-dong li Qing-zhou Zhai Department of Basic Science Jilin Jianzhu UniversityChangchun 130118China Research Center for Nanotechnology Changchun University of Science and TechnologyChangchun 130022China

Nano mesocellular foam silica(MCFs)was synthesized through the hydrothermal method in this *** X-ray diffraction and scanning electron microscopy were used to characterize the MCFs *** sample presented spherical particles and regular *** results of transmission electron microscopy showed that synthesized MCFs has a three-dimensional honeycomb pore structure,which aids in the adsorption of nickel ion(Ni^2+).The results of low-temperature nitrogen gas adsorption-desorption showed that the pore diameter of the synthesized MCFs was 19.6 *** impacts of pH,temperature,amount of adsorbent,initial concentration of Ni^2+,and contact time on the adsorption effect of Ni^2+ by MCFs were *** the optimized adsorption conditions,the adsorption rate reached 96.10%and the adsorption capacity was 7.69 mg/*** has been determined through the study of kinetics and adsorption isotherms that the adsorption of Ni^2+ by MCFs follows the pattern of the pseudo-second-order kinetic model,simultaneously belonging to the Freundlich adsorption *** thermodynamic results of adsorption showed that,when the temperature is between 25℃ and 45℃,the adsorption is a spontaneous exothermic reaction.

关键词： Nickel ion Adsorption MCFs Kinetics Thermodynamics Hydrothermal method Wastewater treatment

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

Dissipative preparation of multipartite Greenberger-Horne-Zeilinger states of Rydberg atoms

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Chinese Physics B 2021年第2期30卷 71-78页

作者： Chong Yang dong-xiao li xiao-Qiang Shao Center for Quantum Sciences and School of Physics Northeast Normal UniversityChangchun 130024China Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of EducationNortheast Normal UniversityChangchun 130024China School of Physics International Joint Laboratory on Quantum Sensing and Quantum MetrologyHuazhong University of Science and TechnologyWuhan 430074China

The multipartite Greenberger-Horne-Zeilinger(GHZ)states play an important role in large-scale quantum information *** utilize the polychromatic driving fields and the engineered spontaneous emissions of Rydberg states to dissipatively drive three-and four-partite neutral atom systems into the steady GHZ states,at the presence of the nextnearest neighbor interaction of excited Rydberg ***,the introduction of quantum Lyapunov control can help us optimize the dissipative dynamics of the system so as to shorten the convergence time of the target state,improve the robustness against the spontaneous radiations of the excited Rydberg states,and release the limiting condition for the strengths of the polychromatic driving *** the feasible experimental conditions,the fidelities of three-and four-partite GHZ states can be stabilized at 99.24%and 98.76%,respectively.

关键词： multipartite entanglement Lyapunov control Rydberg antiblockade quantum dissipation

Recent advances of computational aeroacoustics

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Applied Mathematics and Mechanics(English Edition) 2015年第1期36卷 131-140页

作者： xiao-dong li Min JIANG Jun-hui GAO Da-kai liN li liU xiao-yan li School of Energy and Power Engineering Beihang University Beijing Aeronautical Science & Technology Research Institute of Commercial Aircraft Corporation of China Beijing Institute of Space Launch Technology Research and Development Center China Academy of Launch Vehicle Technology

Computational aeroacoustics （CAA） is an interdiscipline of aeroacoustics and computational fluid dynamics （CFD） for the investigation of sound generation and propagation from various aeroacoustics problems. In this review, the foundation and research scope of CAA are introduced firstly. A review of the early advances and applications of CAA is then briefly surveyed, focusing on two key issues, namely, high order finite difference scheme and non-reflecting boundary condition. Furthermore, the advances of CAA during the past five years are highlighted. Finally, the future prospective of CAA is briefly discussed.

关键词： aeroacoustics computational aeroacoustics (CAA) high order finite difference scheme non-reflecting boundary condition