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Chinese Journal of Chemical Physics 2008年第2期21卷 181-186页

作者： Yong Su Liang Xu Xue-mei Liang yi-qing chen School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China Hefei General Machinery Research Institute Hefei 230031 China

Single-crystalline Ga-doped SnO2 nanowires and SnO2：Ga2O3 heterogeneous microcombs were synthesized by a simple one-step thermal evaporation and condensation method. They were characterized by means of X-ray powder diffraction （XRD）, field-emission scanning electron microscopy （FE-SEM）, energy-dispersive X-ray spectroscopy （EDS）, transmission electron microscopy （TEM） and selected-area electron diffraction （SAED）. FE-SEM images showed that the products consisted of nanowires and mierocombs that represent a novel morphology. XRD, SAED and EDS indicated that they were single-crystalline tetragonal SnO2. The influence of experimental conditions on the morphologies of the products is discussed. The morphology of the product showed a ribbon-like stem and nanoribbon array aligned evenly along one or both side of the nanoribbon. It was found that many Ga2O3 nanoparticles deposited on the surface of the microcombs. The major core nanoribbon grew mainly along the [110] direction and the self-organized branching nanoribbons grew epitaxially along [110] or [110] orientation from the （110） plane of the stem. A growth process was proposed for interpreting the growth of these remarkable SnO2：Ga2O3 heterogeneous microcombs. Due to the heavy doping of Ga, the emission peak in photoluminescence spectra has red-shifted as well as broadened significantly.

关键词： Microcomb Nanoribbon Photoluminescence

Super-Large-Scale Structures in the Sloan Digital Sky Survey

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Chinese Journal of Astronomy and Astrophysics 2006年第1期6卷 35-42页

作者： Xin-Fa Deng yi-qing chen Qun Zhang Ji-Zhou He Mathematics and Physics College Nanchang University Jiangxi 330047 Management Collegel Nanchang University Nanchang 330047

We study the super-large-scale structures in the Sloan Digital Sky Survey by cluster analysis, and examine the geometry and the properties of the member galaxies. Two subsamples are selected from the SDSS, Subsample 1 at the celestial equator and Subsample 2 further north. In Subsample 1 we discover two compact super-large-scale structures： the Sloan Great Wall and the CfA Great Wall. The Sloan Great Wall, located at a median redshift of z= 0.07804, has a total length of about 433 Mpc and a mean galaxy density of about six times that of the whole sample. Most of its member galaxies are of medium size and brightness. The CfA Great Wall, located at a median redshift of z = 0.03058, has a total length of about 251 Mpc and includes large percentages of faint and small galaxies and relatively fewer early-type galaxies.

关键词： galaxy: distances and redshifts - large-scale structure of universe

Isolated Main Galaxy Pairs from the SDSS Data Release 4

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Chinese Journal of Astronomy and Astrophysics 2006年第4期6卷 411-420页

作者： Xin-Fa Deng yi-qing chen Ping Wu cheng-Hong Luo Ji-Zhou He Mathematics and Physics College Nanchang University Nanchang 330047 Management College Nanchang UniversityNanchang330047

From the Main galaxy data of the SDSS Data Release 4 （SDSS4）, we have identiffed close galaxy pairs at neighbourhood radius R = 100 kpc by three-dimensional cluster analysis. Using the criterion that an ＂isolated galaxy pair＂ must be separated from its ＂nearest neighbor＂ by more than 500 kpc, we constructed an isolated galaxy pair sample of 1158 pairs. We also constructed a random pair sample by randomly selecting 1158 galaxy pairs from the Main galaxy sample, which has the same redshift distribution as the isolated galaxy pair sample, and in which the two components of any pair have the same redshifts. Comparative studies of luminosity and size between the members of the galaxy pairs are performed. We find and further confirm there is no tendency for paired galaxies to have similar luminosities or sizes. From the isolated pair sample we also selected a subsample with the magnitude limit of the primary raised by 2 magnitudes, so as to include pairs in which the secondary is 2 magnitudes fainter than the primary. This subsample contains 82 pairs. A random pair sample is similarly constructed.

关键词： galaxy: fundamental parameters- galaxies: interactions

Fe48Co52 Alloy Nanowire Arrays： Effects of Magnetic Field Annealing

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Chinese Journal of Chemical Physics 2009年第1期22卷 82-86页

作者： Hai-lin Su Shao-long Tang Rui-long Wang yi-qing chen Chong Jia You-wei Du School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China National Laboratory of Solid State Microstructure and Department of Physics Nanjing University Nanjing 210093 China

The effects of magnetic field annealing on the properties of Fe48Co52 alloy nanowire arrays with various interwire distances （Di=30-60 nm） and wire diameters （Dw=22-46 nm） were investigated in detail. It was found that the array＇s best annealing temperature and crys- talline structure did not show any apparent dependence on the treatment of applying a 3 kOe magnetic field along the wire during the annealing process. For arrays with small Dw or with large Di, the treatment of magnetic field annealing also had no obvious influence on their magnetic performances. However, such a magnetic field annealing constrained the shift of the easy magnetization direction and improved the coercivity and the squareness obviously for arrays with large Dw or with small Di. The difference in the intensity of the effective anisotropic field within the arrays was believed to be responsible for this different variation of the array＇s magnetic properties after magnetic field annealing.

关键词： FeCo alloy, Nanowire array, Magnetic field annealing, Magnetic property Effective anisotropie field

Effect of distribution of fines on evolution of cooperation in spatial public goods game

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Chinese Physics B 2024年第9期33卷 239-245页

作者： Xing-Ping Sun Yan-Zheng Bi Hong-Wei Kang Yong Shen qing-yi chen School of Software Yunnan UniversityKunming 650000China

In the realm of public goods game,punishment,as a potent tool,stands out for fostering *** it effectively addresses the first-order free-rider problem,the associated costs can be *** incur expenses in imposing sanctions,while defectors face ***,these monetary elements seemingly vanish into thin air,representing a loss to the system ***,by virtue of the redistribution of fines to cooperators and punishers,not only can we mitigate this loss,but the rewards for these cooperative individuals can be *** upon this premise,this paper introduces a fine distribution mechanism to the traditional pool punishment *** identical parameter settings,by conducting a comparative experiment with the conventional punishment model,the paper aims to investigate the impact of fine distribution on the evolution of cooperation in spatial public goods *** experimental results clearly demonstrate that,in instances where the punishment cost is prohibitively high,the cooperative strategies of the traditional pool punishment model may completely ***,the model enriched with fine distribution manages to sustain a considerable number of cooperative strategies,thus highlighting its effectiveness in promoting and preserving cooperation,even in the face of substantial punishment cost.

关键词： public goods game fine distribution cooperation

Distribution pattern of acoustic and streaming field during multi-source ultrasonic melt treatment process

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China Foundry 2023年第5期20卷 452-460页

作者： Xiao-gang Fang Qi Wei Tian-yang Zhang Ji-guang Liu You-wen Yang Shu-lin Lü Shu-sen Wu yi-qing chen School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Engineering Research Center of High-Performance Copper Alloy Materials and Processing Ministry of EducationHefei 230009China State Key Laboratory of Material Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China

The ultrasonic melt treatment(UMT)is widely used in the fields of casting and ***,there are certain drawbacks associated with the conventional process of single-source ultrasonic(SSU)treatment,such as the fast attenuation of energy and limited range of *** this study,the propagation models of SSU and four-source ultrasonic(FSU)in Al melt were respectively established,and the distribution patterns of acoustic and streaming field during the ultrasonic treatment process were investigated by numerical simulation and physical *** simulated results show that the effective cavitation zone is mainly located in a small spherical region surrounding the end of ultrasonic horn during the SSU treatment *** the FSU is applied,the effective cavitation zone is obviously expanded in the *** increases at first and then decreases with increasing the vibration-source spacing(Lv)from 30 mm to 100 ***,when the Lv is 80 mm,the area of effective cavitation zone reaches the largest,indicating the best effect of ***,the acoustic streaming level and flow pattern in the melt also change with the increase of *** the Lv is 80 mm,both the average flow rate and maximum flow rate of the melt reach the highest,and the flow structure is more stable and uniform,with the typical morphological characteristics of angular vortex,thus significantly expanding the range of acoustic *** accuracy of the simulation results was verified by physical experiments of glycerol aqueous solution and tracer particles.

关键词： four-source ultrasound acoustic cavitation streaming field vibration-source spacing

Prognostic role of C-reactive protein in prostate ：ancer： a systematic review and meta-analysis

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Asian Journal of Andrology 2014年第3期16卷 467-471页

作者： Zhu-qing Liu Li Chu Jue-Min Fang Xi Zhang Hua-Xin Zhao yi-Jing chen qing Xu Department of Medical Oncology Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai China.

Several studies have reported that C-reactive protein （CRP）, an inflammation biomarker, may be associated with the prognosis of prostate cancer （PCa）. The objective of this systematic review is to summarize the predictive role of CRP for survival in PCa as reported in previous studies. Related studies were identified, and evaluated for quality through multiple search strategies. Data was collected from studies comparing overall and cancer-specific survival （CSS） in patients with elevated CRP levels and those having lower levels. However, for progression-free survival （PFS）, data were collected according to the log of CRP. The hazard ratio （HR） and its 95% confidence interval （Cl） were used to assess the strength of associations. A total of nine studies （n = 1,497） were evaluated in this meta-analysis （five for overall survival （OS）, four for CSS and two for PFS）. For OS and PFS, the pooled HR of CRP was statistically significant at 1.51 （95% Cl, 1.28-1.79） and 1.50 （95% Cl, 1.25-1.81）, respectively. For CSS, the pooled HR was 1.91 （95% CI, 1.36-2.69） with higher CRP expression in PCa, which strongly indicates poorer survival in PCa. This study demonstrates that CRP may have a critical prognostic value in patients with prostatic cancer.

关键词： C-reactive protein meta-analysis prognosis prostate cancer

Discreet investors exert greater influence on cooperation in the public goods game

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Chinese Physics B 2024年第3期33卷 170-178页

作者：康洪炜金展瑶李明远旺咩孙兴平沈勇陈清毅 School of Software Yunnan UniversityKunming 650000China College of Information Science and Engineering Northeastern UniversityShenyang 110004China

This paper studies the evolutionary process of cooperative behavior in a public goods game model with heterogeneous investment strategies in square *** the proposed model,players are divided into defectors,cooperators and discreet *** these,defectors do not participate in investing,discreet investors make heterogeneous investments based on the investment behavior and cooperation value of their neighbors,and cooperators invest equally in each *** real life,heterogeneous investment is often accompanied by time or economic *** discreet investors in this paper pay a certain price to obtain their neighbors'investment behavior and cooperation value,which quantifies the time and economic costs of the heterogeneous investment *** results of Monte Carlo simulation experiments in this study show that discreet investors can effectively resist the invasion of the defectors,form a stable cooperative group and expand the cooperative advantage in ***,when discreet investors pay too high a price,they lose their strategic *** results in this paper help us understand the role of heterogeneous investment in promoting and maintaining human social cooperation.

关键词： public goods game heterogeneous investment discreet investors cooperation

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： yi Qi Xueying chen Bowen Liu Xuliang Lin Xueqing Qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

Synthesis and Photoluminescence of SiOx Nanotubes

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Chinese Journal of Chemical Physics 2006年第6期19卷 511-514页

作者：蒋海峰陈翌庆周庆涛苏勇张庶元肖海花合肥工业大学材料科学与工程学院合肥230009 中国科技大学合肥微尺度物质科学国家实验室合肥23002

Amorphous SiOx nanotubes with homogeneous diameters were fabricated in large-scale on silicon substrate by thermal evaporation method, with liquid gallium as medium. The average diameter of tubes is about 80 nm and the length is more than 10 μm, with small ratio between the inner and outer diameter of the tube. The silicon element in the substrate and the residual oxygen element in reaction chamber were first dissolved into liquid Ga. Thea the SiOs precipitated from the surface of gallium droplet, forming the nanotube structure with Ga droplet being the center. The room temperature photoluminescence measurements under excitation at 260 nm show that the SiOx nanotubes has a strong blue emission at 453 nrn with two shoulders at 410 and 480 nm respectively, which may be related to oxygen defects. The preparation method improved the traditional complicated method and also provided a new way to fabricate SiOx nanotubes in large quantity.

关键词： Amorphous Nanotubes Photoluminescence