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Status of 2MV Tandem Accelerator

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IMP & HIRFL Annual Report 1994年 191-192页

作者： Qian Zhihua wang Xianyi Li zhengfang and Zu Kailing

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Design of Quasi-planar Ridge SOI Waveguide Resonator for Integrated Optical Gyro

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Design of Quasi-planar Ridge SOI Waveguide Resonator for Int...

Prevalence of hypothyroidism in rheumatoid arthritis and its correlation with disease activity

中国材料大会2012

作者： Kunbo wang Lishuang Feng zhengfang Dong Laboratory on Inertial Science and Technology Beihang University Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) Beihang University

ISBN: (纸本)9783037856079

In order to realize the opto-electronic integration of optic gyro, the quasi-planar ridge SOI waveguide resonator is proposed due to its low loss and small bend radius. First, the single mode condition and smallest bend radius were simulated by using the 3-dimension finite difference beam propagation method （3-D BPM）. Then the relationship between the sensitivity of gyro and the resonator characteristics, such as radius and coupling coefficient, was analyzed by applying the model of the integrated optical gyro. Based on these simulations, the ridge height and width of the waveguide were 220 nm and 1.2 μmrespectively and the smallest bend radius was 600μm. It is shown that the theoretical detection limit of the gyro was 0.031 °/s when the resonator diameter was 5cm and the coupler’s splitting ratio was 46.7:53.3. This gyro system is suitable for tactical and civil applications.

关键词： Integrated optics Waveguide Resonator Gyroscope SOI Quasi-planar

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Prevalence of hypothyroidism in rheumatoid arthritis and its...

Comparison of plasma vitamin D levels in patients with Sjogren syndrome and healthy subjects

2016年浙江省风湿病学学术年会暨风湿免疫病诊疗进展学习班

作者： ShuShan Zhao Jian wang zhengfang Zhang Department of Rheumatology and Immunology Dongyang Hospital Affiliated to Wenzhou Medical University

Objectives An association between thyroid malfunction and rheumatic disease has long been a subject of *** performed this study with an aim to find out whether any association between hypothyroidism and RA exists and whether it is influenced by the duration of *** A total of 36 RA patients were enrolled in this *** patients were assessed fully clinically and

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Comparison of plasma vitamin D levels in patients with Sjogr...

干燥综合征合并黏膜相关淋巴组织淋巴瘤一例并文献复习

2016年浙江省风湿病学学术年会暨风湿免疫病诊疗进展学习班

作者： ShuShan Zhao Jian wang zhengfang Zhang Department of Rheumatology and Immunology Dongyang Hospital Affiliated to Wenzhou Medical University

Objective Sjogren syndrome(SS)is a systemic autoimmune disease characterized by chronic inflammation of the salivary and lacrimal *** is increasing evidence indicating that vitamin D is important in the initiation and propogation of a range of autoimmune diseases which may include *** aim of the present study was to evaluate plasma vitamin D(vit D)levels in patients with SS and to compare this with a control *** Forty-two SS patients(37[88.1%]female and 5[1 1.9%]male)and 20 healthy controls(18[90.0%]female and 2[10.0%]male)were included into the *** baseline 25-hydroxy-vit D levels were measured

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新疆医学 2024年第4期54卷 496-498页

作者：李正芳王雯婧钟岩罗采南石亚妹陈晓梅吴雪武丽君新疆维吾尔自治区人民医院风湿免疫科新疆类风湿关节炎临床医学研究中心乌鲁木齐830001

干燥综合征是一种以淋巴细胞增殖和进行性外分泌腺体损伤为特征的慢性炎症性自身免疫病。临床除有唾液腺、泪腺功能受损以外,亦可出现多系统多脏器受累。干燥综合征发生淋巴瘤的风险明显增加,本文报道1例长病程、反复白细胞减低、高免... 详细信息

干燥综合征是一种以淋巴细胞增殖和进行性外分泌腺体损伤为特征的慢性炎症性自身免疫病。临床除有唾液腺、泪腺功能受损以外,亦可出现多系统多脏器受累。干燥综合征发生淋巴瘤的风险明显增加,本文报道1例长病程、反复白细胞减低、高免疫球蛋白血症的干燥综合征患者在随访过程中出现黏膜相关淋巴组织淋巴瘤,提醒临床医生在日常工作中提高警惕,注意相关的筛查。

关键词：干燥综合征黏膜相关淋巴组织淋巴瘤外分泌腺体随访过程临床医生长病程淋巴细胞增殖高免疫球蛋白血症

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反应加速度法中地震动参数的修正研究

现代隧道技术 2014年第1期51卷 32-37页

作者：董正方王君杰河南大学土木建筑学院开封475004 同济大学桥梁工程系上海200092

文章采用结构变形和自由场变形之间的相互作用系数修正反应加速度法中的地震动参数,近似考虑结构存在对场地地震动参数的影响,进而得出了修正的反应加速度法。为了验证该方法的适用性,设定某种地质条件下的典型圆形盾构隧道为基准模型,... 详细信息

文章采用结构变形和自由场变形之间的相互作用系数修正反应加速度法中的地震动参数,近似考虑结构存在对场地地震动参数的影响,进而得出了修正的反应加速度法。为了验证该方法的适用性,设定某种地质条件下的典型圆形盾构隧道为基准模型,使用反应加速度法、修正方法、时程法计算衬砌刚度变化时的结构内力。结果表明,若以时程法为准,修正方法可提高反应加速度法的精度,且对设计中关注的弯矩精度提高最大。

关键词：反应加速度法盾构隧道地震动参数

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聚锆碳硅烷陶瓷先驱体的制备与表征

高分子学报 2008年第6期18卷 621-625页

作者：曹淑伟谢征芳王军王浩国防科技大学航天与材料工程学院CFC重点实验室长沙410073

为了提高SiC陶瓷纤维的综合性能,利用聚二甲基硅烷（PDMS）热解制得的液相产物聚硅碳硅烷（PSCS）与乙酰丙酮锆（Zr（AcAc）4）反应,制备了含锆SiC陶瓷纤维的先驱体聚锆碳硅烷（PZCS）.选用液相PSCS作为反应原料,可使锆元素在先驱体中... 详细信息

为了提高SiC陶瓷纤维的综合性能,利用聚二甲基硅烷（PDMS）热解制得的液相产物聚硅碳硅烷（PSCS）与乙酰丙酮锆（Zr（AcAc）4）反应,制备了含锆SiC陶瓷纤维的先驱体聚锆碳硅烷（PZCS）.选用液相PSCS作为反应原料,可使锆元素在先驱体中分布更加均匀,并能防止Zr（AcAc）4在反应过程中升华.实验合成的PZCS化学式为SiC1.94HxO0.066Zr0.0104,数均分子量Mn=200～400,再成型性良好.反应机理研究表明,反应过程中存在PSCS裂解重排反应,Si—H键在反应中显示出很高的活性,PZCS分子量的增加是PSCS形成的Si—H键与Zr（AcAc）4的配位基发生交联反应的结果.利用PZCS制备的Si—Zr—C—O陶瓷纤维平均强度2.6GPa,平均直径11μm,性能优异.

关键词：先驱体聚锆碳硅烷碳化硅聚碳硅烷改性

SiO_2气凝胶的非超临界干燥法制备与表征

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硅酸盐学报 2007年第11期35卷 1551-1555页

作者：曹淑伟谢征芳王军王浩薛金根国防科技大学航天与材料工程学院新型陶瓷纤维及复合材料国防科技重点实验室长沙410073

以聚二甲基硅烷为原料,采用聚合物超临界法制备了SiO_2气凝胶。聚合物超临界法制备的SiO_2气凝胶除碳前为疏水性气凝胶,比表面积为27.68m^2/g,孔体积为0.1037cm^3/g,平均孔径约为15nm;除碳后为亲水性气凝胶,比表面积为500.6m^2/g,孔体积... 详细信息

以聚二甲基硅烷为原料,采用聚合物超临界法制备了SiO_2气凝胶。聚合物超临界法制备的SiO_2气凝胶除碳前为疏水性气凝胶,比表面积为27.68m^2/g,孔体积为0.1037cm^3/g,平均孔径约为15nm;除碳后为亲水性气凝胶,比表面积为500.6m^2/g,孔体积为0.4043 cm^3/g.平均孔径为3.23 nm。对聚合物超临界法制备SiO_2气凝胶的反应机理进行了初步探讨。

关键词：氧化硅气凝胶硅聚合物非超临界干燥疏水亲水

Switchable hidden spin polarization and negative Poisson's ratio in two-dimensional antiferroelectric wurtzite crystals

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Journal of Semiconductors 2023年第12期44卷 72-80页

作者： Zhuang Ma Jingwen Jiang Gui wang Peng Zhang Yiling Sun zhengfang Qian Jiaxin Zheng Wen Xiong Fei wang Xiuwen Zhang Pu Huang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Renewable and Sustainable Energy Institute University of ColoradoBoulderColorado 80309USA

Two-dimensional(2D)antiferroelectric materials have raised great research interest over the last ***,we reveal a type of 2D antiferroelectric(AFE)crystal where the AFE polarization direction can be switched by a certain degree in the 2D *** 2D functional materials are realized by stacking the exfoliated wurtzite(wz)monolayers with“self-healable”nature,which host strongly coupled ferroelasticity/antiferroelectricity and benign *** AFE candidates,i.e.,Zn X and Cd X(X=S,Se,Te),are all semiconductors with direct bandgap atΓpoint,which harbors switchable antiferroelectricity and ferroelasticity with low transition barriers,hidden spin polarization,as well as giant in-plane negative Poisson's ratio(NPR),enabling the co-tunability of hidden spin characteristics and auxetic magnitudes via AFE *** 2D AFE wz crystals provide a platform to probe the interplay of 2D antiferroelectricity,ferroelasticity,NPR,and spin effects,shedding new light on the rich physics and device design in wz semiconductors.

关键词： wurtzite crystal multiferroics hidden spin polarization negative Poisson's ratio