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带有Rellich项的双调和非线性方程组解的存在性

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数学的实践与认识 2024年第9期54卷 213-221页

作者：张玉灵杨海婧张新功郑州铁路职业技术学院基础教学部河南郑州451460 重庆师范大学数学科学学院重庆401331

文章研究了一类带有不同Rellich位势项和多重Sobolev临界指数的双调和方程组,运用变分法得到在一定条件下,Rellich项系数为变系数时方程组解的存在性,首次把调和方程组的相关结果推广到对应的变系数双调和方程组.

关键词：双调和方程组临界Sobolev指数 Rellich位势项变系数

Papers featured in the World Journal of Gastroenterology from 2006 to 2007

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World Journal of Gastroenterology 2009年第35期15卷 4471-4475页

作者： Hua yang jing-hai Zhang Fang Zhang Library ofShengjing Hospital China Medical University Shenyang110004 Liaoning Province China

AIM:To analyze papers published in the World Journal of Gastroenterology(WJG)from 2006 to *** investigated the highly cited papers for geographic distribution of the cited authors,as well as the distribution of the citing journals and year of citation. METHODS:Papers published in WJG from 2006 to 2007 and their citations were retrieved from the Science Citation Index Expanded(SCIE).The papers and their citations were analyzed according to bibliometric methods,including the number of citations for a given paper,the distribution of the highly cited papers,the geographic distribution of the cited authors,and the years of citation. RESULTS:Two thousand five hundred and six papers published in WJG from 2006 to 2007 were collected through SCIE,and 2335 of these were categorized as articles,reviews or *** 2006 and 2007, the average citation rate was 85.08%and 70.48%, respectively,and the average number of citations per paper was 4.33 and *** the 2506 papers, 1963 were cited 8788 times by other *** mean number of citations per paper was *** papers with over three citations accounted for 54.72% of all those that were cited,and the total number of citations accounted for 85.38%of the total of 8788 *** papers were cited over 30 times and the highest number of citations for any one paper was *** cited authors came from 70 differentcountries or regions,with China,Japan and the United States being the most *** highest average citation rate and number of citations per paper were for authors from Canada(96.30%,6.89),Hungary (92.31%,5.62),Australia(88.46%,5.46),Germany (87.04%,5.33),and Spain(87.50%,5.11).The impact factor was 2.081 and the self-citation rate was 9.41% in *** papers published in WJG in 2006-2007 were cited by 1597 ***:The papers in WJG have a high number of citations,and have been cited in numerous journals by authors from various *** results imply that WJG has an influenti

关键词： Citation analysis Bibliometrics World Journal of Gastroenterology

布地奈德压缩雾化吸入辅助治疗妊娠期支气管炎的临床疗效及安全性分析

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四川生理科学杂志 2024年第5期46卷 1062-1064页

作者：杨海静路俊锋李变晓洛阳市妇幼保健院内科河南洛阳471000 洛阳市妇幼保健院急诊科河南洛阳471000 洛阳伊洛医院重症医学科河南洛阳471000

目的:分析布地奈德压缩雾化吸入辅助治疗妊娠期支气管炎的临床疗效及安全性。方法:回顾性收集2022年8月至2023年9月期间本院收治的112例妊娠期支气管炎患者临床资料。依据治疗方案的不同,将112例妊娠期支气管炎患者分为对照组(予常规治... 详细信息

目的:分析布地奈德压缩雾化吸入辅助治疗妊娠期支气管炎的临床疗效及安全性。方法:回顾性收集2022年8月至2023年9月期间本院收治的112例妊娠期支气管炎患者临床资料。依据治疗方案的不同,将112例妊娠期支气管炎患者分为对照组(予常规治疗,60例)和试验组(予布地奈德压缩雾化吸入辅助常规治疗,62例)。分析对比两组治疗前、治疗2 m后的临床疗效、症状消退情况及不良反应,采用酶联免疫吸附试验法测定肿瘤坏死因子-α(Tumor necrosis factor-alpha,TNF-α)、C-反应蛋白(C-reaction protein,CRP)、白介素-6(Interleukin-6,IL-6)。结果:治疗后,试验组的临床总有效率(95.16%)显著高于对照组(83.33%)(P0.05)。结论:在妊娠期支气管炎患者中使用布地奈德压缩雾化吸入辅助治疗,能提高临床疗效,改善患者临床症状,降低炎性因子水平,且用药安全性较高。

关键词：布地奈德压缩雾化吸入妊娠期支气管炎临床疗效不良反应

Genetic Algorithm-Based Optimization Used in Rolling Schedule

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Journal of Iron and Steel Research International 2008年第2期15卷 18-22页

作者： yang jing-ming CHE hai-jun DOU Fu-ping ZHOU Tao Institute of Electrical Engineering Yanshan University Qinhuangdao 006004 Hebei China

A genetic algorithm-based optimization was used for 1 370 mm tandem cold rolling schedule,in which the press rates were coded and *** superiority individual is reserved in every *** and comparison of optimized schedule with the existing schedule were *** is seen that the performance of the optimal rolling schedule is satisfactory and promising.

关键词： tandem cold rolling rolling schedule energy consumption genetic algorithm optimization

Preparation and Luminescence Behavior of CaSiO_3∶Eu^(3+)(Bi^(3+))

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Chemical Research in Chinese Universities 2006年第6期22卷 671-674页

作者： yang jing-hai LIU Wen-yan yang Li-li ZHANG Yong-jun WANG Ya-xin FAN Hou-gang Institute of Condensed State Physics Jilin Normal University Siping 136000 P. R. China Department of Mathematics and Physics Jilin Institute of Chemical Technology Jilin 132022 P. R. China Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 P. R. China

CaSiO3：Eu0.08^3＋Bi0.002^3＋ with a monoclinic perovskite structure was synthesized by using sol-gel method, and its luminescence characteristics were investigated. From the excitation spectrum, it can be seen that the main peaks located at 238,396,415,437 and 359 nm correspond to the charge-transfer band of Eu^3＋-O^2- , the absorption transitions of ^7F0.1→^3L6, ^7F0→^5D3, ^7F1→^5D3 of Eu^3＋ ions, and ^3P1→^1S0 of Bi^3＋ ions, respectively. When the samples were excited with a light of wavelength 359 or 395 nm, it can be seen from the emission spectrum that the electronic dipole transition located at 609 nm corresponding to ^5D0→^7F2 of Eu^3＋ ions was stronger than the magnetic dipole transition located at 587 nm corresponding to ^5D0→^7F1 of Eu^3＋ ions, which shows that more Eu^3＋ ions were located in nonreversion center lattices. The energy transfer from Bi^3＋ ions to Eu^3＋ ions in the phosphor was also discussed. The results show that Eu^3＋ ions could be well sensitized by ^3＋ions, and the energy-transfer pattern between Bi^3＋ ions and Eu^3＋ ions was resonance energy transfer.

关键词： CaSiO3 Luminescence characteristic Sensitization Sol-gel method

Fabrication of Graphene by Cleaving Graphite Chemically

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Chemical Research in Chinese Universities 2011年第4期27卷 547-549页

作者： ZHAO Shu-hua ZHAO Xiao-ting FAN Hou-gang yang Li-li ZHANG Yong-jun yang jing-hai Physics College of Jilin Normal University Siping 136000 P. R. China

Graphite was chemically cleaved to graphene by Billups Reaction,and the morphologies and microstructures of graphene were characterized by SEM,Raman and *** results show that the graphite was first functionalized by 1-iodododecane,which led to the cleavage of the graphene layer in the *** second decoration cleaved the graphite further and graphene was *** heights of the graphene layer were larger than 1 nm due to the organic decoration.

关键词： Graphene Graphite Chemical cleaving

Structures and Properties of Zn_(1-x)Cu_xO Nanoparticles by Sol-gel Method

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Chemical Research in Chinese Universities 2009年第4期25卷 430-432页

作者： LIU Hui-lian yang jing-hai ZHANG Yong-jun WANG Ya-xin WEI Mao-bin Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 P. R. China Graduate School of the Chinese Academy of Sciences Beijing 100049 P. R. China Institute of Condensed State Physics Jilin Normal University Siping 136000 P. R. China

Copper-doped ZnO nanoparticles were synthesized by the sol-gel *** X-ray diffraction（XRD） result shows that Zn1-xCuxO（x≤0.04） samples are single phase with ZnO-like wurtzite structure,while the secondary phase Cu is observed in a Zn0.95Cu0.05O *** measurements indicate that Zn1-xCuxO（x≤0.04） samples are ferromagnetic at room temperature.A strong green peak（520 nm） was observed except for UV band peak in photoluminescent（PL） spectrum of Zn0.98Cu0.02O.

关键词： Diluted magnetic semiconductor Sol-gel Ferromagnetism

Synthesis and Soft Magnetic Properties of Mg-doped Ni Nanoparticles

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Chemical Research in Chinese Universities 2008年第5期24卷 534-536页

作者： yang jing-hai FENG Bo LIU yang ZHANG Yong-jun yang Li-li WANG Ya-xin LANG Ji-hui WANG Dan-dan The Institute of Condensed State Physics Jilin Normal University Siping 136000 P. R. China Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 P. R. China Graduate School of the Chinese Academy of Sciences Beijing 100049 P. R. China

Mg-doped Ni nanoparticles with good soft magnetic properties were prepared with the sol-gel method and were sintered at 400, 500, 600, and 900℃ in argon atmosphere, respectively. The structure and magnetic properties of the samples were studied by means of X-ray diffraction, TEM, and VSM magnetometers. X-Ray powder diffraction results show that Ni-Mg solid solution was formed with the single phase of face-centered cubic（fcc） structure. The particle size became larger with the increase of temperature. When the sintering temperature was 400 °C, the particle size was 6.3 nm, whereas it was 46.2 nm at 900 °C. Both the saturation magnetization（Ms） and the coercivity were enhanced with the increase of the particle size. The Ms values of the samples ranged from 18.965 to 46.766 emu/g and the coercivity ranged from 1051.3568 to 9145.0848 A/m.

关键词： Mg Ni Nanoparticles Soft magnetic property Sol-gel method

Synthesis and Photoluminescence of Eu-doped ZnO Nanosheets

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Chemical Research in Chinese Universities 2011年第2期27卷 174-176页

作者： WANG Dan-dan yang jing-hai CAO Jian LANG Ji-hui GAO Ming LIU Xiao-yan Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 P R. China Graduate School of Chinese Academy of Sciences Beo＇ing 100049 P R. China Institute of Condensed State Physics Jilin Normal University Siping 136000 P R. China

Eu-doped ZnO nanosheets were synthesized successfully by means of the hydrothermal method. The X-ray diffraction（XRD） pattern shows that the sample is a single phase with the ZnO-like wurtzite structure. And the X-ray photoelectron spectrum suggests that there are Eu3＋ ions in the matrix of the sample. Eu3＋-related red emissions resulted from energy transfer were observed for the nanosheets under UV laser excitation. The UV, green and yellow emissions were also seen in the photoluminescence spectra.

关键词： Oxide material Chemical synthesis Optical property