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22篇 您的检索式:作者名="Qunyan"
    题名 作者 年代 出处 被引量
1Regional immunity in tissue homeostasis and diseases显示文摘The immune system functions in the organ/tissue of the body.The immune cell differentiation and function are influenced by the organ/tissue microenvironments in which they reside,and the interaction of immune cells with the organ/tissue microenvironments may affect and even determine the outcome of the immune responses(Hu and Pasare,2013;Zajac and Harrington,2014).It has beenZhigang Tian Xuetao Cao Yongyan Chen Qunyan Lyu 2016Science China(Life Sciences)2016,59,12:4
2A geometric Model for the Spatial Correlation of an Acoustic Vector Field in Surface-generated Noise显示文摘健全压力和在水平地成层的媒介的表面噪音的粒子速度的空间关联被表明,与一致地在海洋表面上散布的方向性的噪音来源一起。在粒子速度的评估,飞机波浪近似被用于每条事件光线。由于健全来源关联性质和它的择向性的等价,这域的空间关联的解决方案被转变成单身的方向性的来源产生的协调函数的集成。作为一典型水平地成层的媒介,在完美的波导的表面噪音被调查。正常模式和几何模型给的关联系数显示出令人满意的同意。另外,在健全压力之间的规范的协变性和粒子速度的垂直部件与声学的吸收系数成正比,当在半无穷地同类的空间的表面噪音的是零时。Yiwang Huang (1) huangyiwang@hrbeu.edu.cn Qunyan Ren (12) Ting Li (3) 2012Journal of Marine Science and Application2012,11,1:4
3A new simple model trust-region method with generalized Barzilai-Borwein parameter for large-scale optimization显示文摘In this paper, a new trust region method with simple model for solving large-scale unconstrained nonlinear optimization is proposed. By employing the generalized weak quasi-Newton equations, we derive several schemes to construct variants of scalar matrices as the Hessian approximation used in the trust region subproblem. Under some reasonable conditions, global convergence of the proposed algorithm is established in the trust region framework. The numerical experiments on solving the test problems with dimensions from 50 to 20,000 in the CUTEr library are reported to show efficiency of the algorithm.ZHOU QunYan SUN WenYu ZHANG HongChao 2016Science China Mathematics2016,59,11:4
4Interregional protection: Implications of fiscal decentralization and trade liberalization显示文摘Li Jie Larry D Qiu Qunyan Sun 2003China Economics Review2003,14,:1
5Facile Access to Uranium and Thorium Phosphaethynolate Complexes Supported by Tren: Experimental and Theoretical Study显示文摘The issue of covale nee of acti nide complexes remai ns con troversial to date.The in troducti on of 2-phosphaethy nolate anion into acti・nide complexes is expected to in vestigate the reaction mode and the bon ding property.Herei n,we describe the function alizatio n of An(Tren^(TIPS))CI(1:An=U;2:An=Th)precursors with NaOCP(dioxane)_(2.5) through salt-elimination method leading to the formation of the corresponding uranium and thorium phosphaethynolate species:[U(Tren^(TIPS))(OCP)]⑶and[Th(Tren^(TIPS))(OCP)](4).Jipan Yu Kang Liu Qunyan Wu Bin Li Xianghe Kong Kongqiu Hu Lei Mei Liyong Yuan Zhifang Chai Weiqun Shi 2021Chinese Journal of Chemistry2021,39,8:1
6Morphology tailoring of hydroxyapatite nanoparticles by hydrothermal processing with amino acids 显示文摘GAO Wcimin LI Qunyan RUAN Chengxiang 2005Key Eng Mater2005,280,2:1
7Design criteria for tetradentate phenanthroline-derived heterocyclic ligands to separate Am(Ⅲ) from Eu(Ⅲ)显示文摘To design novel phenanthroline-derived soft ligands for selectively separating minor actinides from lanthanides, four tetradentate phenanthroline-derived heterocyclic ligands(BTPhen, BPyPhen, BPzPhen, and BBizPhen) were constructed and their complexation behaviors with Am(ⅡI) and Eu(ⅡI) were systematically investigated by density functional theory(DFT) coupled with relativistic small-core pseudopotential. In all the 1:1-type species, the metal ion is in the center of the cavity and coordinates with two nitrogen atoms(N1 and N1′) of the phenanthroline skeleton and the other two nitrogen atoms(N2 and N2′) of the auxiliary groups. The bond lengths of Am–N are comparable to or even shorter than those of Eu–N bonds because the ionic radii of Am(ⅡI) are larger than those of Eu(ⅡI). Additionally, the negative ΔΔGAm/Eu value for the reaction of [M(H2O)4-(NO3)3] + L → ML(NO3)3 + 4H2 O indicates that the complexation reaction of Am(ⅡI) is more energetically favorable than that of Eu(ⅡI); this can be considered as an important design criterion to screen phenanthroline-derived ligands for MA(ⅡI) extraction. According to this criterion, the selectivity of tetradentate phenanthroline-derived ligands for separating Am(ⅡI) over Eu(ⅡI) follows the order of BTPhen > BBizPhen > BPyPhen > BPzPhen.XIAO ChengLiang WU QunYan WANG CongZhi ZHAO YuLiang CHAI ZhiFang SHI WeiQun 2014Science China Chemistry2014,57,11:1
8Efficacious selective separation of U(Ⅵ) over Mo(Ⅵ) using novel 2,9-diamide-1,10-phenanthroline ligands: Liquid-liquid extraction and coordination chemistry显示文摘Uranium and molybdenum are important strategic elements. The production of ^(99)Mo and the hydrometallurgical process of uranium ore face difficult problems of separation of uranium and molybdenum.In this study, the four phenanthroline diamide ligands were synthesized, and extraction and stripping experiments were performed under different conditions to evaluate the potential application of these ligands for separation of U(Ⅵ) over Mo(Ⅵ). With the growth of alkyl chain, the solubility of ligands could be greatly improved, and the separation effect of U(Ⅵ) over Mo(Ⅵ) gradually increased. The SF_(U/Mo) were around 10,000 at 4 mol/L HNO3. Three stripping agents were tested with the stripping efficiency of Na_(2)CO_(3)(5%) > H_(2)O > HNO_(3)(0.01 mol/L). The stripping percentages of the three stripping agents were all close to unity, indicating that the ligands had the potential to be recycled. The chemical stoichiometry of U(Ⅵ) complexes with ligands was evaluated as 1:1 using electrospray ionization mass spectrometry,ultraviolet visible spectroscopy and single-crystal X-ray diffraction. The consistency between theoretical calculation and experimental results further explains the coordination mechanism.Taoyuan Xiu Simei Zhang Peng Ren Siyan Liu Shuai Wang Hamza Shehzad Jingyang Wang Meng Zhang Guoan Ye Caishan Jiao Qunyan Wu Liyong Yuan Zhifang Chai Weiqun Shi 2023Chinese Chemical Letters2023,34,11:1
9Sol - Gel Pro- cessing of Zirconia Coating for HR Mirrors with High Laser Damage Threshold 显示文摘Shen Jun Zhang Qunyan Wang Jue 2000Journal of Sol - Gel Science and Technology2000,19,13:1
10Preparation of zirconia thin films via sol - gel process from inorganic precursor 显示文摘Shen Jun Zhang Qunyan Wang Jue 2000Proc SPIE2000,4086,406:1
11Interregional protection: Implications of fiscal decentralization and trade liberalization显示文摘Jie LI Larry D QIU Qunyan SUN 2003China Economic Review2003,,3:1
12A Study of Opti- mal State Shares in Mixed Oligopoly: Implications for SOE Re- form and Foreign Competition 显示文摘Sun Qunyan Zhang Anming Li Jie 2005China Economic Review2005,,16:1
13MicroRNA- 146a acts as a metastasis suppressor in gastric cancer by tar- geting WASF2显示文摘Qunyan Y Zhongwei C Chuantao T 2013Cancer Letters2013,335,1:1
14Spectrophotometric Determination of Palladium by the Colouration with 2-( 2- Quinolylazo)-5-diethylaminobenzoic Acid 显示文摘Huang Zhangjie Wei Qunyan Yang Xiangjun 2005Bull Korean Chem Soc2005,26,10:1
15Morphology tailoring of hydroxyapatite nanoparticles by hydrothermal processing with amino acids 显示文摘GAO Weimin LI Qunyan RUAN Chengxiang 2005Key Eng Mater2005,280,15:1
16Boron rings containing planar octacoordinate iron and cobalt显示文摘The boron rings containing planar octacoordinate transition metals, D8h FeB82-, CoB8- and CoB83+, C2v FeB8, D2h CoB8+ and CoB8, are optimized with all real vibrational frequencies at the B3LYP/6-311+G* level of the theory. The D8h FeB82- and CoB8- isomers are global minima, while D8h CoB83+ is only local minimum. The electronic structure character of these systems is revealed by natural bond orbital (NBO) analysis, showing that the boron rings containing planar octacoordinate transition metals have stability and aromaticity with six π electrons. The aromaticity is confirmed by nucleus independent chemical shifts (NICS) calculations.WU QunYan TANG YuPeng ZHANG XiuHui 2009Science China Chemistry2009,52,3:1
17Trans-dimensional Bayesian geoacoustic inversion in shallow water显示文摘To deal with the inversion problem when the spatial structure of seaffoor sediments is unknown, a trans-dimensional particle filter method is proposed, where the cross-spectral density of the pressure field is used to estimate the sediment layering structure and geoacoustic parameters. The simulation results show that the number of sediment layers and geoacoustic parameters can be effectively estimated using the proposed method, and the parallel particle calculation makes this method more efficient than reversible jump Monte Carlo Markov chain(rjMCMC) sampling. A linear frequency-modulated signal received by a vertical line array in the South China Sea is processed using the proposed trans-dimensional particle filter. The inversion results of the sediment layers and geoacoustic parameters are similar to those acquired by rjMCMC inversion. The number of sediment layers and the posterior probability density of parameters can be effectively estimated using this method.WU Weiwen REN Qunyan LU Licheng Guo Shengming MA Li 2023Chinese Journal of Acoustics2023,42,4:0
18Immunology in China:Looking Back and Forward显示文摘The evolution of immunology as a scientific discipline, and the current status of immunology research in China and some other countries in the world, is surveyed. Some of the directions in which the field should be highlighted in the future are speculated on.LU Qunyan(Department of life Sciences, NSFC, Beijing 100085) 2002Science Foundation in China2002,10,1:0
19Theoretical investigation on the solution behaviors of Ba and Zr in uranium dinitride显示文摘The in-pile performance of ceramic fuels is significantly affected by the fission products. In this work, we have performed first-principles density functional theoretical calculations to study the interaction between metallic fission products(barium and zirconium) and the uranium dinitride UN2 matrix. The thermodynamic properties and bonding nature of Ba and Zr atoms in different incorporation configurations indicate that Zr is more soluble in UN2 matrix than Ba. With increasing the concentration of the impurity atoms, Zr-doped UN2 exhibits a slight tendency to contract, while Ba-doped UN2 tends to swell. Based on the competition between steric effect and chemical interaction, various incorporation trends for Ba and Zr in UN2 as well as in UN have been understood.Yujuan Zhang Jianhui Lan Qunyan Wu Congzhi Wang Tao Bo Zhifang Chai Weiqun Shi 2015Science China(Information Sciences)2015,58,12:0
20Perioperative psychological issues and nursing care among patients undergoing minimally invasive surgeries显示文摘Minimally invasive surgeries,including laparoscopic,endoscopic,and robotic surgeries,have gained great popularity and have gradually replaced conventional open surgeries.Commonly,patients may have perioperative psychological issues such as anxiety,depression,sleep disturbance,and delirium.A comprehensive literature review was conducted to identify how these psychological issues occur in minimally invasive surgeries and how nurses can take better care of patients to alleviate these issues.Only papers focusing on psychological issues during the perioperative period were included in the re-view,and preexisting issues before the setting of surgical treatment plan were not discussed.Compared to conventional surgeries,the incidence of postoperative anxiety,preoperative depression,and sleep disturbance is lower in minimally invasive surgeries,the incidence of postoperative depression may be higher with limited evidence,and the incidence of preoperative anxiety and delirium is inconclusive.Systematic perioperative nursing programs not only alleviate psychological issues,but also reduce postsurgical complications and accelerate recovery.However,special nursing programs to handle delirium are lacking.Kehua Yang Xu Shao Xinghui Lv Feimin Yang Qunyan Shen Jing Fang Wei Chen 2022Laparoscopic, Endoscopic and Robotic Surgery2022,5,3:0
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