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Analysis of the valence electronic structures and calculation of the physical properties of Fe,Co,and Ni

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Science China(Physics,Mechanics & Astronomy) 2009年第6期52卷 864-868页

作者： wu wenxia XUE ZhiYong HONG Xing LI XiuMei GUO YongQuan Division of Functional Materials Central Iron and Steel Research InstituteBeijing 100081China North China Electric Power University Key Laboratory of Condition Monitoring and Control for Power Plant Equipment Ministry of EducationBeijing 102206China Advanced Technology&Materials Co. Ltd.Amorphous Products BranchBeijing 100081China

The valence electronic structures of Fe, Co and Ni have been investigated with Empirical Electron Theory of Solids and Molecules. The magnetic moments, Curie temperature, cohesive energy and melting point have been calculated according to the valence electronic structure. These calculations fit the experimental data very well. Based on the calculations, the magnetic moments are proportional to the number of 3d magnetic electrons. Curie temperatures are related to the magnetic electrons and the bond lengths between magnetic atoms. Cohesive energies increase with the increase of the number of covalent electrons, and the decrease of the number of magnetic and dumb pair electrons. The melting point is mainly related to the number of covalent electron pairs distributed in the strongest bond. The contribution from the lattice electrons is very small, the dumb pair electrons weaken the melting point; however, the contribution to melting point of the magnetic electrons can be neglected. It reveals that the magnetic and thermal properties are closely related to the valence electronic structures, and the changes or transitions between the electrons obviously affect the physical properties.

关键词： valence electronic structures Curie temperature magnetic moment cohesive energy melting point

Preparation and up-conversion luminescence properties of Er:YbAG and Er:YAG single crystals

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Journal of Materials Science & Technology 2024年第18期185卷 1-8页

作者： Limin wu Zeyu Cheng Shoulei Xu wenxia wu Yazhao Wang Huiting Zhang Zhonghua Zhu Ninghan Zeng Bernard Albert Goodman Wen Deng School of Physical Science and Technology Guangxi UniversityNanning530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Nanning530004China

High quality optical single crystals of cubic Yb_(2.96)Er_(0.04)Al_(5)O_(12)and Y_(2.96)Er_(0.04)A_(l5)O_(12)were successfully pre-pared using the OFZ *** 980 nm photon absorption intensity by Yb_(2.96)Er_(0.04)Al_(5)O_(12)crystal is much larger than that in Y_(2.96)Er_(0.04)A_(l5)O_(12)crystal,the transmission of Yb_(2.96)Er_(0.04)Al_(5)O_(12)crystal is lower than that of Y_(2.96)Er_(0.04)A_(l5)O_(12)crystal,because the density of Yb_(2.96)Er_(0.04)Al_(5)O_(12)single crystal(6.604 g/cm^(3))is larger than that of Y_(2.96)Er_(0.04)A_(l5)O_(12)single crystal(4.529 g/cm^(3)).The up-conversion luminescence spec-tra of the crystals excited by 980 nm laser show several distinct groups of emission peaks at-544 and-556 nm,as well as-650 and-667 *** peak intensities of the up-conversion luminescence spec-trum for the Yb_(2.96)Er_(0.04)Al_(5)O_(12)crystal were much higher than those for the Y_(2.96)Er_(0.04)A_(l5)O_(12)***-all,the results of the present study suggest that Yb_(2.96)Er_(0.04)Al_(5)O_(12)single crystal may have advantages over Y_(2.96)Er_(0.04)A_(l5)O_(12)single crystal for luminescence in solid-state lasers.

关键词： YbAG single crystals Up-conversion luminescence Rare earth ions

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印度尼西亚的民族分离主义运动

世界民族 2005年第2期 18-25页

作者：武文侠北京外国语大学印尼语教研室

印度尼西亚(以下简称印尼)是个多民族的国家,全国共有250多个民族,有人甚至说有500-600个民族.其中,最大的民族是爪哇人,人口占全国人口近50%,最小的民族人口仅有数千人.印尼的民族问题十分复杂,从纵向看,自印尼独立至今,民族冲突、民... 详细信息

印度尼西亚(以下简称印尼)是个多民族的国家,全国共有250多个民族,有人甚至说有500-600个民族.其中,最大的民族是爪哇人,人口占全国人口近50%,最小的民族人口仅有数千人.印尼的民族问题十分复杂,从纵向看,自印尼独立至今,民族冲突、民族分裂活动不曾停止;从横向看,许多民族和地区都发生过不同程度的分裂活动,这对印尼的稳定与安全构成了严重威胁.本文将从以下几方面对印尼的民族分离主义运动进行剖析.

关键词：民族分离主义运动印度尼西亚民族分裂活动民族人口民族问题民族冲突多民族印尼国家稳定

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粤港澳大湾区城市群协同发展路径探讨

江淮论坛 2019年第4期 29-34页

作者：武文霞广东省社会科学院

粤港澳大湾区建设已上升为国家发展战略,虽然三地合作基础深厚,但湾区城市群发展存在一定的时序差异,协同发展面临产业结构性矛盾、行政管理体制障碍、生态环境等发展瓶颈。在粤港澳大湾区建设上升为国家发展战略的良好契机下,湾区内城... 详细信息

粤港澳大湾区建设已上升为国家发展战略,虽然三地合作基础深厚,但湾区城市群发展存在一定的时序差异,协同发展面临产业结构性矛盾、行政管理体制障碍、生态环境等发展瓶颈。在粤港澳大湾区建设上升为国家发展战略的良好契机下,湾区内城市要进一步优化产业结构,构建常态协调机制,推动湾区城市差异化发展,加快生态环境修复,提升湾区城市发展质量,推动区域经济和社会可持续发展。

关键词：粤港澳大湾区城市群协同发展路径

城市化对政党变革发展的影响研究——以英美城市化快速发展时期为例

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学术研究 2019年第8期 49-56,177页

作者：武文霞广东省社会科学院

城市化作为衡量城市发展水平的重要维度,对政党变革产生了重大影响。本文截取城市化快速推进时期这一时间段,探讨城市化对英美政党变革发展的影响。研究发现,城市化引发城市社会阶级结构变化,中产阶级和工人阶级等经济地位的提升及其对... 详细信息

城市化作为衡量城市发展水平的重要维度,对政党变革产生了重大影响。本文截取城市化快速推进时期这一时间段,探讨城市化对英美政党变革发展的影响。研究发现,城市化引发城市社会阶级结构变化,中产阶级和工人阶级等经济地位的提升及其对政治权利的渴望推动了政党变革发展,不仅促进了选举制度改革,而且加强了政党组织发展。同时,城市化改变了传统城市发展格局,新兴城市与传统城市在城市政策需求等方面存在利益对峙和发展矛盾,城市化的地区差异不仅助推了政党活动范围拓展,而且推动了政党地域格局发展变化。

关键词：城市化政党变革英美

Unsteadiness in non-transferred dc arc plasma generators

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Theoretical & Applied Mechanics Letters 2011年第2期1卷 1-7页

作者： Chengkang wu~(a) and wenxia Pan Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

Non-transferred dc arc plasma generators are widely used in materials *** are generally considered steadily-operating ***,unsteady phenomena do exist in them, and may cause non-ideal effects in processes which require high controllability and reproducibility. These unsteady phenomena can cause parameter fluctuations in the arc and the plasma jet,some of which have been studied in recent *** types and mechanisms of these phenomena have been *** paper reviews the research progress in this specific area,hoping to present a more complete picture of this subject.

关键词： unsteadiness fluctuation arc plasma jet plasma generator

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间隔层装置中程序化操作的实现

电力自动化设备 2008年第6期28卷 115-117,121页

作者：罗小莉吴文瑕公元国网南京自动化研究院江苏南京210003

介绍了程序化变电站产生的背景,程序化操作是根据操作要求,选择相应的程序化操作命令,由程序化操作系统自动完成操作。程序化变电站采用分层分步式自动化系统,其控制也是分层分级设置。其控制操作方式分为远控、站控、就地3种方式。分... 详细信息

介绍了程序化变电站产生的背景,程序化操作是根据操作要求,选择相应的程序化操作命令,由程序化操作系统自动完成操作。程序化变电站采用分层分步式自动化系统,其控制也是分层分级设置。其控制操作方式分为远控、站控、就地3种方式。分析了程序化操作的特点及可能存在的问题,以苏州玲珑变电站为例,提出间隔层装置中程序化操作具体的实现方法和解决方案。在间隔层装置中实现程序化操作,减少了操作中监控信息的交互,提高了信息采集的可靠性,加快了响应速度。详细论述了运行状态的辨别和检测及程序化操作规则的实现方法,并给出了相应的逻辑框图。提出在程序化操作系统中应充分实时关注当前程序化操作的前后情况,在执行后续程序化操作时,前续条件也应全部满足,以提高程序化操作的可靠性和成功率。

关键词：间隔层装置程序化变电站程序化操作顺控操作

基线血脂水平对非三阴性乳腺癌患者预后的影响研究

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中国全科医学 2021年第26期24卷 3316-3322页

作者：吴文霞张萌中山大学孙逸仙纪念医院全科医学科广东省广州市510289

背景血脂异常是乳腺癌发病的高危因素之一,目前研究发现血脂代谢水平还可能与乳腺癌分期、病理特点、无病生存期(DFS)及总生存期(OS)紧密相关,但多项研究结果存在争议。目的探讨基线血脂代谢水平对非三阴性乳腺癌患者预后的影响。方法2... 详细信息

背景血脂异常是乳腺癌发病的高危因素之一,目前研究发现血脂代谢水平还可能与乳腺癌分期、病理特点、无病生存期(DFS)及总生存期(OS)紧密相关,但多项研究结果存在争议。目的探讨基线血脂代谢水平对非三阴性乳腺癌患者预后的影响。方法2019年1月-2021年3月检索中山大学孙逸仙纪念医院2016年1月-2017年3月电子病历系统中非三阴性乳腺癌患者202例,均无冠心病、脑血管疾病、糖尿病及血脂异常病史。收集其一般资料〔包括年龄、绝经状态、高血压史、体质指数(BMI)〕;空腹血标本检验血糖、血脂〔包括总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、载脂蛋白A1(APOA1)、载脂蛋白B(APOB)、载脂蛋白E(APOE)〕、超敏C反应蛋白(hsCRP)、尿酸;病理结果包括肿瘤大小(T分期)、淋巴结转移(N分期)及雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(HER-2)、Ki-67、组织分级。将患者按照肿瘤分期进行分组,即乳腺癌分期Ⅰ~Ⅱ期为组1,Ⅲ期为组2。记录患者DFS和OS。采用Kaplan-Meier法绘制DFS和OS的生存曲线,比较采用Log-rank检验。血脂对乳腺癌OS及DFS的影响采用多因素Cox回归模型。结果组2 TG水平高于组1,而HDL-C水平低于组1(P<0.05)。TG和HDL-C预测肿瘤分期Ⅲ期的最佳截断值分别为1.39 mmo/L〔受试者工作特征曲线(ROC曲线)下面积(AUC)为0.626,95%CI(0.562,0.690)〕和1.14 mmol/L〔AUC为0.599,95%CI(0.531,0.668)〕。TG≥1.39 mmol/L和HDL-C<1.14 mmol/L患者Ⅲ期比例高于TG<1.39 mmol/L和HDL-C≥1.14 mmol/L者(P<0.05)。TG≥1.39 mmol/L患者淋巴结转移比例高于TG<1.39 mmol/L者(P<0.05)。HDL-C<1.14 mmol/L患者肿瘤T分期高于HDL-C≥1.14 mmol/L者(P<0.05)。HDL-C≥1.14 mmol/L患者总生存率(98.1%)高于HDL-C<1.14 mmol/L患者(90.9%)(χ2=4.669,P=0.031);HDL-C<1.14 mmol/L患者无病生存率(77.4%)低于HDL-C≥1.14 mmol/L患者(89.8%)(χ2=3.859,P=0.049)。矫正绝经状态、BMI、血压和血糖水平后,基线HDL-C<1.14 mmol/L为复发转移〔HR=2.907,95%CI(1.024,8.255),P=0.045〕和死亡〔HR=8.718,95%CI(1.148,66.198),P=0.036〕的影响因素。结论HDL-C<1.14 mmol/L是非三阴性乳腺癌临床预后差的影响因素。

关键词：乳腺肿瘤非三阴性乳腺癌三阴性乳腺癌无病生存总生存期血脂水平预后

Effect of Various Citrus Rootstock-scion Combinations on Tree Growth,Fruit Quality,and Photosynthetic Characteristics under Red Loam Soil Conditions

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Asian Agricultural Research 2024年第10期16卷 41-49页

作者： Liying GUO Yanjun GUO wenxia wu Xiaohua LI Haiyan JIANG Ying YUAN Guochan HUANG Qianhua JI Institute of Pomology Zhaoqing UniversityZhaoqing 526361China College of Life Sciences Zhaoqing UniversityZhaoqing 526361China Sihui Science and Technology Demonstration Park Zhaoqing 526061China

[Objectives]To investigate the effects of 15 distinct citrus rootstock-scion combinations on tree growth,fruit quality,and photosynthetic characteristics under red loam soil conditions and provide a theoretical foundation for the selection of appropriate citrus rootstock-scion combinations in the Zhaoqing region.[Methods]A total of 15 citrus rootstock-scion combinations were utilized as test materials for a comprehensive analysis of their phenological periods(budding,flowering,and fruiting),tree growth indicators(tree height,crown diameter,and growth),and fruit quality(appearance quality and intrinsic quality).The photosynthetic characteristics of the test materials,including the net photosynthetic rate(Pn),transpiration rate(Tr),water use efficiency(wuE),apparent quantum yield(AQY),and carboxylation efficiency(CE),were analyzed to determine their ***,the leaf photosynthetic physiological indicators,such as soluble protein,specific leaf weight,chlorophyll,and carotenoids,were evaluated.[Results]There were notable differences observed in the phenological period,growth potential of trees,fruit quality,and photosynthetic characteristics among various citrus rootstock-scion *** phenological periods exhibited variation contingent on the grafting *** terms of tree growth potential,the Citrus tangerina Tanaka‘Hongju’and *** Hort.‘Suanju’rootstocks demonstrated greater tree height,crown growth,and overall tree strength;however,they were also prone to excessive ***,the *** Osbeck‘Hongningmeng’and ***×***‘Zhicheng’rootstocks displayed medium growth potential,while the Poncirus trifoliate(L)Raf.‘Zhike’rootstock resulted in shorter *** terms of fruit quality,the single fruit weight of *** Hort.‘Shatangju’ranged from 33 to 50 g,exhibiting a flat and round *** total soluble solids and titratable acid content of‘Shatangju’grafted onto the‘Zhike’rootstock were notably *** contr

关键词： Citrus Rootstock-scion Tree growth Fruit quality Photosynthetic characteristics