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Plasma Science and Technology 2021年第7期23卷 67-77页

作者： sh.osh.ai GUO Kai XIE Bin SUN Ruoyao XI Yan liu School of Aerospace Science and Technology Xidian UniversityXi’an 710071People’s Republic of China

We propose a method of applying a static magnetic field to reduce the attenuation of the magnetic field component(sh. of low-frequency electromagnetic(LF EM) waves in dense plasma. The principle of this method is to apply a static magnetic field to limit electron movement, thereby increasing the equivalent resistance and thus reducing the induced current and sh. We consider the static magnetic field acting on the plasma of the entire induced current loop rather than on the local plasma, where the induced current is excited by the magnetic field component of LF EM waves. Analytical expressions of sh.suitable for magnetized cylindrical enveloping plasma are derived by adopting an equivalent circuit approach, by which sh.s calculated with respect to various plasma parameter settings. The results sh.w that sh.can be reduced under a static magnetic field and the maximum magnetic field strength that mitigates blackout is less than 0.1 T. Experiments in which LF EM waves propagate in a sh.ck-tubegenerated magnetized cylindrical enveloping plasma are also conducted. sh.measured under the magnetic field(the magnetic field strength B0 acting on the magnetic field probe was about0.06 T) reduces at f=10 MHz and f=30 MHz when ne≈1.9×1013 cm-3, which is consistent with theoretical results. The verification of the theory thus suggests that applying a static magnetic field with a weak magnetic field has the potential to improve the transmission capacity of LF EM waves in dense plasma.

关键词： static magnetic field sh.ck tube low-frequency electromagnetic waves cylindrical enveloping plasma

sh.对浅埋圆形弹性夹杂附近任意三角形凸起地形的散射

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应用力学学报 2007年第3期24卷 373-379,502页

作者：刘刚刘殿魁北京大学

利用"契合"的思想,给出了地下弹性夹杂与地面任意三角形凸起地形对sh.散射问题的解析解答。将整个求解区域分割成三部分,区域Ⅰ为带有半圆形弧底的三角形凸起,区域Ⅱ为含半圆形凹陷和浅埋孔洞的弹性半空间,区域Ⅲ为一圆柱形弹性体。在... 详细信息

利用"契合"的思想,给出了地下弹性夹杂与地面任意三角形凸起地形对sh.散射问题的解析解答。将整个求解区域分割成三部分,区域Ⅰ为带有半圆形弧底的三角形凸起,区域Ⅱ为含半圆形凹陷和浅埋孔洞的弹性半空间,区域Ⅲ为一圆柱形弹性体。在区域Ⅰ中构造满足三角形两斜边应力自由的驻波函数,在区域Ⅱ中构造出半圆形凹陷和浅埋孔洞的散射波,在区域Ⅲ内构造一驻波函数,使得圆柱边界应力不受约束;利用复平面下坐标移动,通过区域Ⅰ和区域Ⅱ以及区域Ⅱ和区域Ⅲ的两个"公共边界"位移应力连续条件,建立起求解该问题的无穷代数方程组,并截断有限项进行求解,最后通过具体算例及结果分析得出相应结论。

关键词： sh.散射契合任意三角形凸起移动坐标浅埋弹性夹杂

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土地利用对中国东部地面温度变化的影响

解放军理工大学学报（自然科学版） 2015年第2期16卷 195-202页

作者：刘向培佟晓辉史小康刘烈霜吴洪星解放军65061部队空军装备研究院民航贵州空管分局解放军93173部队

为探索土地利用对气候变化的影响,基于站点观测资料及NCEP/NCAR再分析资料的地面最高、最低温度,采用观测资料减去再分析资料的方法(OMR),研究了1979-2008年我国东部区域地面温度的变化及不同土地利用类型对地面温度变化的影响。研究表... 详细信息

为探索土地利用对气候变化的影响,基于站点观测资料及NCEP/NCAR再分析资料的地面最高、最低温度,采用观测资料减去再分析资料的方法(OMR),研究了1979-2008年我国东部区域地面温度的变化及不同土地利用类型对地面温度变化的影响。研究表明,1979-2008年,研究区域的地面最高、最低温度增加显著,变化趋势分别为0.45和0.47℃/10a;总体上,土地利用状况导致的地面最高温度变化较小,由此导致的地面最低温度变化占最低温度变化总量的25.1%;城镇对地面最高、最低温度的影响最显著,耕地对地面温度日较差的影响最显著;夏、秋季土地利用状况对地面最高、最低温度变化的影响以降低或者增加幅度较小为主,而在春、冬季则主要导致地面温度上升。

关键词：土地利用中国东部地面温度变化趋势

自体髂骨植骨带锁钢板内固定材料置入并一期前后路减压治疗多节段脊髓型颈椎病12例:临床资料回顾分析

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中国组织工程研究与临床康复 2007年第51期11卷 10366-10369页

作者：刘志礼刘东宁韩智敏刘先明黄山虎舒勇南昌大学第一附属医院骨一科江西省南昌市330006 汕头市中心医院广东省汕头市515031

目的:严重的多节段脊髓型颈椎病单纯前路或后路手术都有其局限性。观察一期前后路联合手术并自体髂骨植骨及带锁钢板内固定材料置入在治疗多节段脊髓型颈椎病中的应用价值。方法:选择2004-11/2006-12本院12例多节段脊髓型颈椎病患者,均... 详细信息

目的:严重的多节段脊髓型颈椎病单纯前路或后路手术都有其局限性。观察一期前后路联合手术并自体髂骨植骨及带锁钢板内固定材料置入在治疗多节段脊髓型颈椎病中的应用价值。方法:选择2004-11/2006-12本院12例多节段脊髓型颈椎病患者,均采用一期前后路减压、自体髂骨植骨融合、带锁钢板内固定联合手术。其中男9例,女性3例,年龄49～75岁;3节段受累9例,4节段受累3例(突出节段分布:C3～66例,C4～73例,C3～73例)。全部病例进行临床随访,患者均对本试验知情同意。采用mJOA评分标准对患者神经功能改善情况进行评定;术前颈椎侧位片测量,以D值(C4椎体后下缘到齿突后缘与C7椎体后下缘连线的垂直距离)评价颈椎(C2～7)弧度;根据颈椎伸屈动态侧位片C2和C7椎体后缘切线相交所成的夹角之和评价颈椎(C2～7)活动范围。主要以电话随访和问卷填写的方式,分别从神经功能改善情况、颈椎弧度、活动范围及术后并发症等进行随访观察。结果:①12例患者全部得到随访,术后随访时间6～28个月,平均(16±6)个月。②所有植骨均获得骨性愈合;疗效结果中优4例(33.3%);良6例(50%);无效2例(16.7%);颈椎D值术前(3.9±1.4)mm,术后即刻(8.5±1.7)mm,随访时(8.1±2.5)mm。术前与术后差异有显著性(P<0.01),术后与随访时差异无显著性(P=0.251);颈椎活动范围术前(36.3±4.0)°,随访时(10.6±2.7)°,与术前相比差异具有显著性(P<0.01)。③术后C5神经根麻痹1例,为感觉及运动混合型,8个月随访时,感觉功能恢复,肩关节外展肌力从术后Ⅱ级恢复至Ⅳ级;1例术后6个月出现"S"畸形而再次压迫脊髓,神经功能改善停滞,目前处于随访中。结论:一期前后路手术并自体髂骨植骨及带锁钢板内固定材料置入减压充分、彻底,而且前路手术能重建颈椎稳定性,恢复颈椎生理前凸和椎间高度,并且后路减压术又能预防相邻颈椎退变引起的脊髓继发的压迫。

关键词：多节段脊髓型颈椎病前路减压椎板成形术生物材料临床应用

A flexible conductive hybrid elastomer for high-precision stress/strain and humidity detection

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Journal of Materials Science & Technology 2019年第1期35卷 176-180页

作者： Haoran liu Zhenyi Zhang Jun Ge Xiao Lin Xinye Ni Huilin Yang Lei Yang Orthopaedic Institute Department of Orthopaedics Soochow University Division of Environmental Technology INET Tsinghua University Second People’s Hospital of Changzhou Nanjing Medical University International Research Center for Translational Orthopaedics (IRCTO) Soochow University

Flexible and environment-responsive materials are essential for a large number of applications from artificial skin to wearable devices. The present study develops a flexible, ultra-low cost conductive hybrid elastomer(CHE), which possesses high responsive capabilities to stress/strain and humidity. CHE was composed of polydimethylsiloxane(PDMS) and starch hydrogel(sh., enabling great elasticity(56 kPa),high conductivity(10^(-2)S/m) and high sensitivity to external stimuli(gauge factor of CHE under stress and strain are 0.71 and 2.22, respectively, and sensitivity to humidity is 1.2 × 10^(-6)S/m per RH%). These properties render CHE a promising candidate for artificial skin and wearable electronics applications of continuously monitoring environmental information.

关键词： Conductive composites Electrical properties Mechanical properties Moisture Hybrid Elastomer

Immune responses to the expressed products of the CSP antigen gene of Plasmondium falciparum south in China isolate FCC1/HN in Hela cell

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南通大学学报(医学版) 2003年第1期 115-115页

作者： Yu XB liu YW Luo sh

Objective:To construct a eukaryotic expression system with pcDNA3-PfCSP/Hela for the Circumsporozoite protein(CSP) gene of Plasmodium falciparum(***),to observe the immune responses in BALB/c mice induced by the expressed proteins. Methods:The recombinant plasmid pcDNA3-PfCSP was transformed into the Hela cell *** expressed protein was isolated and analyzed by using SIDS-PAGE and used for immunization of BALB/c mice by subcutaneous, intravenous, and intraperitoneal ***-linked immunosorbent assay(ELISA),Dot-ELISA,Western blot,T lymphocyte proliferation test,natural killer cell(NKC) activity assay,and CD4(+) and CD8(+) T cell detection were used for observation of humoral and cellular immune responses. Results:Immune sera strongly reacted with the expressed protein,antibody titer was up to 1:6400 as detected by *** blot analysis revealed a specific band at 38.3 *** the spleen cells of normal and immunized BALB/c mice were specifically stimulated with expressed protein,the optical densities were 0.12+/-0.03 and 0.34+/-0.04,*** latter were significantly higher than the former(Psh.wed that the NKC activity of immunized BALB/c mice was remarkably higher than that of the controls(Psh.wed that the percentage of CD4(+) and CD8(+) T cells of immunized group were significantly higher than that of control group(P<0.05).Conclusions:The humoral and cell-mediated immune responses and elevated NKC activity to products made with a eukaryotic expression sytem could be specifically detected in BALB/c *** findings indicated that the expressed protein could enhance the immune function in mice.

关键词： plasmodium falciparum circumsporozoite protein Held cell expressed product immune response

Peltate glandular trichomes of Colquhounia seguinii harbor new defensive clerodane diterpenoids

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Journal of Integrative Plant Biology 2014年第9期56卷 928-940页

作者： Chun-Huan Li Yan liu Juan Hua sh.-Hong Luo sh.ng-Hong Li State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botanythe Chinese Academy of Sciences University of Chinese Academy of Sciences

Glandular trichomes produce a wide variety of secondary metabolites that are considered as major defensive chemicals against herbivore *** morphology and secondary metabolites of the peltate glandular trichomes of a lianoid Labiatae,Colquhounia seguinii Vaniot,were *** new clerodane diterpenoids,seguiniilactones A-C（1-3）,were identified through precise trichome collection with laser microdissection,metabolic analysis with ultra performance liquid chromatography-tandem mass spectrometer,target compound isolation with classical phytochemical techniques,structure elucidation with spectroscopic *** compounds sh.wed significant antifeedant activity against a generalist plant-feeding insect Spodoptera *** A（1） was approximately 17-fold more potent than the commercial neem oil.a-Substituted α,β-unsaturated γ-lactone functionality was found to be crucial for strong antifeedant activity of this class of *** results indicated that the levels of these compounds in the peltate glandular trichomes and leaves were sufficiently high to deter the feeding by generalist *** antifungal activity was observed for seguiniilactone C（3） against six predominant fungal species isolated from the diseased leaves of C seguinii,while seguiniilactones A and B were generally *** findings suggested that seguiniilactones A-C might be specialized secondary metabolites in peltate glandular trichomes for the plant defense against insect herbivores and pathogens.

关键词： Colquhounia seguinii Vaniot peltate glandular trichomes laser microdissection clerodane diterpenoids antifeedant and antifungal activities

Effect of dihydrotestosterone on the expression of mucin 1 and the activity of Wnt signaling in mouse corneal epithelial cells

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International Journal of Ophthalmology(English.edition) 2016年第11期9卷 1535-1540页

作者： Li Qin Cheng Pei Qian-Yan Kang Zhao liu Li Li Department of Ophthalmology the First Affiliated Hospital of Xi'an Jiaotong University

AIM： To explore the effects of the androgen dihydrotestosterone on the expression of mucin 1（MUC1） and the activity of Wnt signaling in mouse corneal epithelial ***： Primary mouse corneal epithelial cells were isolated from the corneas of BALB/c mice. Quantitative real-time polymerase chain reaction, immunofluorescence and Western blot analysis were used to quantify the differential expression of selected genes. The androgen receptor was silenced by transfecting cells with androgen receptor sh.RNAs. TOP-Flash.and FOP-flash.reporter plasmids were used to measure β-catenin-driven transcription. RESULTS： Dihydrotestosterone treatment increased MUC1 expression and activated the Wnt signaling pathway and led to the translocation of β-catenin and upregulation of the Wnt downstream target gene TATA box binding protein and urokinase plasminogen *** effects were prevented by downregulating the androgen ***： Androgens may protect against dry eye by regulating the expression of MUC1 which is stimulated by the activation of Wnt signaling via the androgen receptor. An understanding of the mechanisms associated with androgen-mediated protection against dry eye is an important step in developing new therapies for this disease.

关键词： dihydrotestosterone dry eye β-catenin mucins androgen receptor

Highly Efficient Synthesis of Au130（SPh-Br）50 Nanocluster

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Chemical Research in Chinese Universities 2018年第5期34卷 719-722页

作者： REN Xiuqing FU Xuemei LIN Xinzhang liu Chao HUANG Jiahui YAN Jinghui School of Chemistry & Environmental Engineering Changchun University of Science and Technology Changchun 130022 P. R. China Gold Catalysis Research Center State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023P. R. China University of Chinese Academy of Sciences Beijing 100049 R R. China

We reported the synthesis ofAul3o（SPh-Br）50（Br-Ph-sh.4-bromothiophenol） nanocluster with high purity and high yield via ＂size focusing＂ and ＂ligand exchange＂ processes. The time of synthetic process was significantly reduced compared with previous synthetic routine. AU130（SPh-Br）50 was determined by UV-Vis absorption spectros- copy and matrix-assisted laser desorption ionization（MALDI） mass spectroscopy. Thermo-gravimetric analysis （TGA） and size-exclusion chromatogram（SEC） analyses confirmed the purity of AU130（SPh-Br）50. The yield of gold nanoc- lusters was 20%（based on HAuCl4）.

关键词： Au130 Gold nanocluster Thiolate ligand

冠状动脉病变程度及其侧支循环对左室舒张功能的影响

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第四军医大学学报 2001年第7期22卷 668-669页

作者：刘四海贾国良郭文怡第四军医大学西京医院心血管内科陕西西安710033

0　引言　冠心病患者冠状动脉(冠脉)病变程度与左室功能受损程度是否存在平行关系尚有争议. 有研究提示冠脉病变程度影响左室功能，有人却认为冠脉病变程度对左室功能无直接影响. 近年研究证实冠心病患者左室舒张功能损害出现于左室收... 详细信息

0　引言　冠心病患者冠状动脉(冠脉)病变程度与左室功能受损程度是否存在平行关系尚有争议. 有研究提示冠脉病变程度影响左室功能，有人却认为冠脉病变程度对左室功能无直接影响. 近年研究证实冠心病患者左室舒张功能损害出现于左室收缩功能损害之前. 为此, 我们探讨冠脉病变程度及侧支循环的建立对左室舒张功能的影响.1　对象和方法1．1　对象　1997-01/1998-06我院心血管内科作选择性冠脉造影和左室造影,符合以下条件者：①左前降支、左回旋支和右冠脉至少有一支管腔狭窄直经≥75%或左主干狭窄≥50%;②原发病为冠心病; ③排除近期心肌梗死21.3/13.3 kPa),心包疾病,二尖瓣或主动脉瓣返流,室壁瘤、严重的室壁节段运动异常及影响超声心功能测定的心律失常等及伴肺,肝,肾,脑等严重器质性疾病.符合以上条件者共88(男64,女24)例,年龄41～68(平均52.8)岁,其中14例为陈旧性心肌梗死.

关键词：冠状动脉疾病左室舒张功能侧支循环冠心病