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Microstructure studies of air-plasma-spray-deposited CoNiCrAlY coatings before and after thermal cyclic loading for high-temperature application 被引量:6
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作者 Dipak Kumar K.N.Pandey Dipak Kumar Das 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第8期934-942,共9页
In the present study, bond-coats for thermal barrier coatings were deposited via air plasma spraying(APS) techniques onto Inconel 800 and Hastelloy C-276 alloy substrates. Scanning electron microscopy(SEM), transm... In the present study, bond-coats for thermal barrier coatings were deposited via air plasma spraying(APS) techniques onto Inconel 800 and Hastelloy C-276 alloy substrates. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD), and atomic force microscopy(AFM) were used to investigate the phases and microstructure of the as-sprayed, APS-deposited Co Ni Cr Al Y bond-coatings. The aim of this work was to study the suitability of the bond-coat materials for high temperature applications. Confirmation of nanoscale grains of the γ/γ′-phase was obtained by TEM, high-resolution TEM, and AFM. We concluded that these changes result from the plastic deformation of the bond-coat during the deposition, resulting in Co Ni Cr Al Y bond-coatings with excellent thermal cyclic resistance suitable for use in high-temperature applications. Cyclic oxidative stability was observed to also depend on the underlying metallic alloy substrate. 展开更多
关键词 thermal barrier coatings coating structure plasma spraying thermal cycle high-temperature applications microstructure studies
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Calculation of the Centrally Symmetric and Vortex Forces Acting on Momentum in Distortion Tensor Field: Explanation of High-Temperature Plasma and Vortex Motions
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作者 Aleksander Yakovlevich Braginsky 《Journal of Applied Mathematics and Physics》 2019年第4期809-828,共20页
The paper deals with calculation of the centrally symmetric and vortex forces for the momentum of a particle in the distortion tensor field from the action minimum, by analogy with the calculation of forces for a char... The paper deals with calculation of the centrally symmetric and vortex forces for the momentum of a particle in the distortion tensor field from the action minimum, by analogy with the calculation of forces for a charge in an electromagnetic field. It is demonstrated that: 1) The compensating interaction tensor corresponds to the distortion tensor in a solid. 2) The centrally symmetric force of the distortion tensor acts on the momentum as a charge, and is analogous to the Coulomb force. In a gas, it results in change in the momentum value of the molecules exponentially to some extent. The action of this force explains the high-temperature plasma in the gas. 3) The vortex force of the distortion tensor is equivalent to the Peach-Koehler force in a solid. It acts on the momentum flow, similar to the Lorentz magnetic force, and explains the vortex motions in space, in the form of “black holes”, and in the atmosphere, in the form of cyclones and anticyclones. 展开更多
关键词 DISTORTION TENSOR high-temperature plasma VORTEX Motions Turbulence Gauge FIELD Explosion of a METEORITE
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Bended probe diagnostics of the plasma characteristics within an ECR ion source with a rectangular waveguide 被引量:2
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作者 Juan YANG Yuliang FU +2 位作者 Xianchuang LIU Haibo MENG Yizhou JIN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2018年第8期29-34,共6页
To reveal the argon plasma characteristics within the entire region of an electron cyclotron resonance(ECR) ion source, the plasma parameters were diagnosed using a bended Langmuir probe with the filament axis perpe... To reveal the argon plasma characteristics within the entire region of an electron cyclotron resonance(ECR) ion source, the plasma parameters were diagnosed using a bended Langmuir probe with the filament axis perpendicular to the diagnosing plane. Experiments indicate that,with a gas volume flow rate and incident microwave power of 4 sccm and 8.8 W, respectively,the gas was ionized to form plasma with a luminous ring. When the incident microwave power was above 27 W, the luminous ring was converted to a bright column, the dark area near its axis was narrowed, and the microwave power absorbing efficiency was increased. This indicates that there was a mode transition phenomenon in this ECR ion source when the microwave power increased. The diagnosis shows that, at an incident microwave power of 17.4 W, the diagnosed electron temperature and ion density were below 8 eV and 3×10^17 m^-3, respectively, while at incident microwave power levels of 30 W and 40 W, the maximum electron temperature and ion density were above 11 eV and 6.8×10^17 m^-3, respectively. Confined by magnetic mirrors, the higher density plasma region had a bow shape, which coincided with the magnetic field lines but deviated from the ECR layer. 展开更多
关键词 ECR plasma probe diagnosing ion thruster
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Character Diagnosis for Surface-Wave Plasmas Excited by Surface Plasmon Polaritons 被引量:1
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作者 陈兆权 夏广庆 +5 位作者 刘明海 胡业林 郑晓亮 李平 周启燕 胡希伟 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第8期754-758,共5页
The plasma parameters of planar-type surface-wave plasmas (SWPs) are diagnosed based on the resonant excitation of surface plasmon polaritons (SPPs). The plasma parameter distributions are obtained by changing the... The plasma parameters of planar-type surface-wave plasmas (SWPs) are diagnosed based on the resonant excitation of surface plasmon polaritons (SPPs). The plasma parameter distributions are obtained by changing the discharge conditions of gas pressure and incident power. The measured experimental results show that the plasma near the heating layer is excited by surface waves of SPPs while the plasma located downstream originates from diffusion Moreover, the influence of high-frequency oscillations plays a significant role in producing the proposed SWPs with bi-Maxwellian electron energy distributions. 展开更多
关键词 surface-wave plasmas plasma diagnosing surface plasmon polaritons
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Fabrication of YAG:Ce^(3+) and YAG:Ce^(3+),Sc^(3+) Phosphors by Spark Plasma Sintering Technique
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作者 周卫新 娄朝刚 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2024年第2期255-260,共6页
In this study,a single-doped phosphors yttrium aluminum garnet(Y_(3)Al_(5)O_(12),YAG):Ce^(3+),single-doped YAG:Sc^(3+),and double-doped phosphors YAG:Ce^(3+),Sc^(3+) were prepared by spark plasma sintering(SPS)(lower ... In this study,a single-doped phosphors yttrium aluminum garnet(Y_(3)Al_(5)O_(12),YAG):Ce^(3+),single-doped YAG:Sc^(3+),and double-doped phosphors YAG:Ce^(3+),Sc^(3+) were prepared by spark plasma sintering(SPS)(lower than 1 200℃).The characteristics of synthesized phosphors were determined using scanning electron microscopy(SEM),X-ray diffraction(XRD),and fluorescence spectroscopy.During SPS,the lattice structure of YAG was maintained by the added Ce^(3+) and Sc^(3+).The emission wavelength of YAG:Ce^(3+) prepared from SPS(425-700 nm) was wider compared to that of YAG:Ce^(3+) prepared from high-temperature solid-state reaction(HSSR)(500-700 nm).The incorporation of low-dose Sc^(3+) in YAG:Ce^(3+) moved the emission peak towards the short wavelength. 展开更多
关键词 high-temperature solid-state reaction spark plasma sintering yttrium aluminum garnet PHOSPHORS
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Preparation of Mo(Si,Al)_2 feedstock used for air plasma spraying
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作者 侯晖东 宁先进 +3 位作者 王全胜 高斌 柳彦博 刘颖 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第11期2939-2946,共8页
In order to prepare high quality Mo(Si,Al)2 feedstock characterized with C40 phase, higher Al doping amount andexcellent flowability, Mo(Si1-x,Alx)2 with different Al contents (x=0, 0.1, 0.2, 0.3, 0.4, 0.5) were... In order to prepare high quality Mo(Si,Al)2 feedstock characterized with C40 phase, higher Al doping amount andexcellent flowability, Mo(Si1-x,Alx)2 with different Al contents (x=0, 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized by self-propagatinghigh-temperature synthesis first and Mo(Si0.6,Al0.4)2 was confirmed as the suitable material through X-ray diffraction analysis. Aseries of tests with different parameters of induction plasma spheroidization were applied to improving the flowability of feedstock.Mo(Si,Al)2 feedstock with excellent flowability (26.2 s/50 g) was prepared through adding hydrogen into sheath gas and decreasingthe powder feeding rate. The composition segregation occurred in the spheroidized powder after Al consumption and oxidation. Theinhomogeneous structure of the same particle was caused by the asymmetric heating and cooling when particle passed through theplasma jet. 展开更多
关键词 Mo(Si Al)2 C40 phase self-propagating high-temperature synthesis induction plasma spheroidization compositionsegregation
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Interaction between plasma and electromagnetic field in ion source of 10 cm ECR ion thruster 被引量:3
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作者 Hao Mou Yi-Zhou Jin +2 位作者 Juan Yang Xu Xia Yu-Liang Fu 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第7期404-412,共9页
Through diagnosing the plasma density and calculating the intensity of microwave electric field,four 10 cm electron cyclotron resonance(ECR)ion sources with different magnetic field structures are studied to reveal th... Through diagnosing the plasma density and calculating the intensity of microwave electric field,four 10 cm electron cyclotron resonance(ECR)ion sources with different magnetic field structures are studied to reveal the inside interaction between the plasma,magnetic field and microwave electric field.From the diagnosing result it can be found that the plasma density distribution is controlled by the plasma generation and electron loss volumes associated with the magnetic field and microwave power level.Based on the cold plasma hypothesis and diagnosing result,the microwave electric field intensity distribution in the plasma is calculated.The result shows that the plasma will significantly change the distribution of the microwave electric field intensity to form a bow shape.From the boundary region of the shape to the center,the electric field intensity varies from higher to lower and the diagnosed density inversely changes.If the bow and its inside lower electric field intensity region are close to the screen grid,the performance of ion beam extracting will be better.The study can provide useful information for the creating of 10 cm ECR ion source and understanding its mechanism. 展开更多
关键词 electron cyclotron resonance plasma plasma diagnosing ion source
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Comparative study of β-Si_3N_4 powders prepared by SHS sintered by spark plasma sintering and hot pressing 被引量:3
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作者 Ling Bai Xiaodong Mao Weiping Shen Changchun Ge 《Journal of University of Science and Technology Beijing》 CSCD 2007年第3期271-275,共5页
β-Si3N4 powders prepared by self-propagating high-temperature synthesis (SHS) with additions of Y2O3 and Al2O3 were sintered by spark plasma sintering (SPS). The densification, microstructure, and mechanical prop... β-Si3N4 powders prepared by self-propagating high-temperature synthesis (SHS) with additions of Y2O3 and Al2O3 were sintered by spark plasma sintering (SPS). The densification, microstructure, and mechanical properties of Si3N4 ceramics prepared using this method were compared with those obtained by hot pressing process. Well densified Si3N4 ceramics with finer and homogeneous microstructure and better mechanical properties were obtained in the case of the SPS technique at 200°C lower than that of hot pressing. The microhardness is 15.72 GPa, the bending strength is 716.46 MPa, and the fracture toughness is 7.03 MPa·m1/2. 展开更多
关键词 self-propagating high-temperature synthesis (SHS) hot pressing spark plasma sintering (SPS) silicon nitride mechanicalproperties
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Microstructure and high-temperature oxidation behavior of plasma-sprayed Si/Yb2SiO5 environmental barrier coatings 被引量:8
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作者 Jie XIAO Qiaomu LIU +2 位作者 Jingchen LI Hongbo GUO Huibin XU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2019年第8期1994-1999,共6页
An environmental barrier coating(EBC) consisting of a silicon bond coat and an Yb2-SiO5 top-coat was sprayed on a carbon fibers reinforced SiC ceramic matrix composite(CMC) by atmospheric plasma spray(APS). The micros... An environmental barrier coating(EBC) consisting of a silicon bond coat and an Yb2-SiO5 top-coat was sprayed on a carbon fibers reinforced SiC ceramic matrix composite(CMC) by atmospheric plasma spray(APS). The microstructure of the coating annealed at 1300 ℃ and its high-temperature oxidation behavior at 1350 ℃ were investigated. The significant mass loss of silica during the plasma spray process led to the formation of Yb2SiO5 and Yb2O3 binary phases in the top-coat. Eutectics of Yb2SiO5 and Yb2O3 were precipitated in the top-coat, and channel cracks were formed in the top-coat after 20 h annealing because of the mismatch between the coefficients of thermal expansion(CTEs) of Yb2SiO5 and the SiC substrate. The EBC effectively improved the oxidation resistance of the CMC substrate. The channel cracks in the Yb2SiO5 top-coat provided inward diffusion channels for oxygen and led to the formation of oxidation delamination cracks in the bond coat, finally resulting in spallation failure of the coating after 80 h oxidation. 展开更多
关键词 Ceramic matrix composite(CMC) ENVIRONMENTAL barrier coatings(EBCs) high-temperature oxidation plasma SPRAY YTTERBIUM SILICATE
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IR-transparent MgO-Gd_(2)O_(3) composite ceramics produced by self-propagating high-temperature synthesis and spark plasma sintering 被引量:3
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作者 Dmitry A.Permin Maksim S.Boldin +7 位作者 Alexander V.Belyaev Stanislav S.Balabanov Vitaly A.Koshkin Atrem A.Murashov Igor V.Ladenkov Evgeny A.Lantsev Ksenia E.Smetanina Nadia M.Khamaletdinova 《Journal of Advanced Ceramics》 SCIE CAS CSCD 2021年第2期237-246,共10页
A glycine–nitrate self-propagating high-temperature synthesis(SHS)was developed to produce composite MgO-Gd_(2)O_(3) nanopowders.The X-ray powder diffraction(XRD)analysis confirmed the SHS-product consists of cubic M... A glycine–nitrate self-propagating high-temperature synthesis(SHS)was developed to produce composite MgO-Gd_(2)O_(3) nanopowders.The X-ray powder diffraction(XRD)analysis confirmed the SHS-product consists of cubic MgO and Gd_(2)O_(3) phases with nanometer crystallite size and retains this structure after annealing at temperatures up to 1200℃.Near full dense high IR-transparent composite ceramics were fabricated by spark plasma sintering(SPS)at 1140℃and 60 MPa.The in-line transmittance of 1 mm thick MgO-Gd_(2)O_(3) ceramics exceeded 70%in the range of 4–5 mm and reached a maximum of 77%at a wavelength of 5.3 mm.The measured microhardness HV0.5 of the MgO-Gd2O3 ceramics is 9.5±0.4 GPa,while the fracture toughness(KIC)amounted to 2.0±0.5МPa·m1/2.These characteristics demonstrate that obtained composite MgO-Gd_(2)O_(3) ceramic is a promising material for protective infra-red(IR)windows. 展开更多
关键词 MgO-Gd_(2)O_(3) self-propagating high-temperature synthesis(SHS) spark plasma sintering(SPS) optical properties infra-red(IR)ceramics
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Shear and bulk viscosity of high-temperature gluon plasma
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作者 Le Zhang De-Fu Hou 《Chinese Physics C》 SCIE CAS CSCD 2018年第6期59-66,共8页
We calculate the shear viscosity(η) and bulk viscosity(ζ) to entropy density(s) ratios η/s and ζ/s of a gluon plasma system in kinetic theory, including both the elastic gg←→gg forward scattering and the i... We calculate the shear viscosity(η) and bulk viscosity(ζ) to entropy density(s) ratios η/s and ζ/s of a gluon plasma system in kinetic theory, including both the elastic gg←→gg forward scattering and the inelastic soft gluon bremsstrahlung gg←→ggg processes. Due to the suppressed contribution to η and ζ in the gg←→gg forward scattering and the effective g←→gg gluon splitting, Arnold, Moore and Yaffe(AMY) and Arnold, Dogan and Moore(ADM) have got the leading order computations for η and ζ in high-temperature QCD matter. In this paper, we calculate the correction to η and ζ in the soft gluon bremsstrahlung gg←→ggg process with an analytic method.We find that the contribution of the collision term from the gg←→ggg soft gluon bremsstrahlung process is just a small perturbation to the gg←→gg scattering process and that the correction is at~ 5% level. Then, we obtain the bulk viscosity of the gluon plasma for the number-changing process. Furthermore, our leading-order result for bulk viscosity is the formula ζ∝(αs^2 T^3)/(lnαs^-1) in high-temperature gluon plasma. 展开更多
关键词 shear viscosity bulk viscosity entropy density high-temperature gluon plasma soft gluon bremsstrahlung
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用脉冲激光全息干涉术测量稠密等离子体电子密度分布 被引量:10
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作者 丰善 王淑岩 +4 位作者 王国志 郝志琦 陈智 李文洪 郑志坚 《光子学报》 EI CAS CSCD 北大核心 2001年第11期1339-1342,共4页
利用脉冲激光作为探测光源 ,采用全息双曝光法对激光惯性约束核聚变高温高稠度等离子体的诊断 ,开发了原理上全新的诊断方法 .打靶主激光与探测激光实现严格同步 Δt≤ 1 0 - 11~ 1 0 - 10 s,可获得高空间分辨率 Δδ≤ 1 μm等离子体... 利用脉冲激光作为探测光源 ,采用全息双曝光法对激光惯性约束核聚变高温高稠度等离子体的诊断 ,开发了原理上全新的诊断方法 .打靶主激光与探测激光实现严格同步 Δt≤ 1 0 - 11~ 1 0 - 10 s,可获得高空间分辨率 Δδ≤ 1 μm等离子体二维图象 (阴影图象和干涉图象 ) ,并保证时间分辨率 Δt达到 1 0 - 11s左右 . 展开更多
关键词 稠密等离子体诊断 脉冲激光全息干涉术 电子密度分布 惯性约束核聚变
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微波共振探针及其在等离子体诊断中的应用 被引量:2
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作者 马柳 时家明 +2 位作者 袁忠才 陈宗胜 黄勇 《核聚变与等离子体物理》 EI CAS CSCD 北大核心 2008年第3期270-273,共4页
介绍了能够测量稳定和时变等离子体电子密度的微波共振探针,给出了其工作原理和在测量稳定、时变和瞬态等离子体电子密度中的应用。分析了传输模式和反射模式的工作过程及对测量范围、测量精度和空间分辨率等影响因素。结果表明,选用较... 介绍了能够测量稳定和时变等离子体电子密度的微波共振探针,给出了其工作原理和在测量稳定、时变和瞬态等离子体电子密度中的应用。分析了传输模式和反射模式的工作过程及对测量范围、测量精度和空间分辨率等影响因素。结果表明,选用较长的探针有利于提高电子密度的测量范围和精度;选用的微波扫频源高端频率越高,频率分辨率越高,则电子密度的测量范围越大,测量精度越高。理论分析得出系统可测量的电子密度约为1.37×108~4.1×1011cm-3。 展开更多
关键词 等离子体诊断 微波共振探针 等离子体密度
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柱状等离子体微波透射衰减数据的测量及其应用 被引量:1
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作者 程立 时家明 +2 位作者 汪家春 袁忠才 许波 《真空科学与技术学报》 EI CAS CSCD 北大核心 2014年第2期171-174,共4页
微波透射衰减数据是研究等离子体与微波相互作用时的重要实验数据,本文针对柱状等离子体,分析了准确测量其微波透射衰减所应满足的三个条件:等离子体等厚、入射波远场、等离子体反射可忽略;并设计了满足上述条件的测量实验。除直接用于... 微波透射衰减数据是研究等离子体与微波相互作用时的重要实验数据,本文针对柱状等离子体,分析了准确测量其微波透射衰减所应满足的三个条件:等离子体等厚、入射波远场、等离子体反射可忽略;并设计了满足上述条件的测量实验。除直接用于分析等离子体参数对微波传输的影响外,本文提出了该数据的另外两种用途:诊断等离子体参数、判定等离子体稳定性。 展开更多
关键词 柱状等离子体 微波透射衰减 等离子体参数 诊断 稳定性
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循环肿瘤细胞临床应用的新进展 被引量:3
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作者 朱玲 向敏 +2 位作者 刘馨 陈艳 王熙才 《现代肿瘤医学》 CAS 2014年第11期2746-2748,共3页
循环肿瘤细胞(Circulating tumor cells,CTCs)是指释放到血液中的罕见肿瘤细胞,被认为是肿瘤血液转移的关键步骤之一。循环肿瘤细胞的检测对于肿瘤的诊断、治疗和预后判定都具有非常重要的意义,是目前肿瘤研究的热点之一。本文将从预测... 循环肿瘤细胞(Circulating tumor cells,CTCs)是指释放到血液中的罕见肿瘤细胞,被认为是肿瘤血液转移的关键步骤之一。循环肿瘤细胞的检测对于肿瘤的诊断、治疗和预后判定都具有非常重要的意义,是目前肿瘤研究的热点之一。本文将从预测生物标志物、治疗反应、预后、血浆肿瘤DNA四个方面介绍循环肿瘤细胞临床应用的最新研究进展。 展开更多
关键词 循环肿瘤细胞 诊断 治疗反应 预后 血浆肿瘤DNA
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丝阵Z箍缩实验1维X光辐射功率分布 被引量:3
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作者 李林波 杨建伦 +1 位作者 钟耀华 宁家敏 《强激光与粒子束》 EI CAS CSCD 北大核心 2007年第11期1822-1826,共5页
在Angara-5-1联合实验中,利用条纹像机和光纤阵列实现时间分辨和1维空间分辨,得到了丝阵条纹像,观察到丝阵负载箍缩区X光辐射的1维轴向空间分布信息随时间的演化过程,考察了内爆的同步性和均匀性。通过对比不同结构负载内爆等离子体X光... 在Angara-5-1联合实验中,利用条纹像机和光纤阵列实现时间分辨和1维空间分辨,得到了丝阵条纹像,观察到丝阵负载箍缩区X光辐射的1维轴向空间分布信息随时间的演化过程,考察了内爆的同步性和均匀性。通过对比不同结构负载内爆等离子体X光1维时空分布信息,发现由于内层等离子体对磁流体瑞利-泰勒不稳定性的抑制作用,(40+20)根双层钨丝阵比60根单层钨丝阵的内爆轴向同步性好,产生的X光辐射功率高;由于负载存在弯曲、断丝、扭曲等现象,(60+30)根双层钨丝阵比90根单层钨丝阵的轴向同步优势不明显;轴向同步性好与辐射功率高之间存在相关性;辐射波形前沿较快时,X光功率较高。 展开更多
关键词 Z箍缩 丝阵 时空分辨 X光辐射诊断 功率分布 等离子体
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基于波导耦合反应腔串联的线形微波等离子体源 被引量:1
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作者 张田田 马志斌 +3 位作者 黄宏伟 王传新 付秋明 汪建华 《真空科学与技术学报》 EI CAS CSCD 北大核心 2016年第8期906-909,共4页
通过将两个波导耦合反应腔串联,得到了具有线形结构的微波等离子体源。利用光纤光谱仪沿等离子体轴向测量不同位置的等离子体发射光谱,对等离子体中不同基团的发射光谱强度进行了比较分析,研究了反应腔结构对等离子体均匀性的影响。实... 通过将两个波导耦合反应腔串联,得到了具有线形结构的微波等离子体源。利用光纤光谱仪沿等离子体轴向测量不同位置的等离子体发射光谱,对等离子体中不同基团的发射光谱强度进行了比较分析,研究了反应腔结构对等离子体均匀性的影响。实验结果表明:通过将波导耦合反应腔串联可以在引导天线表面产生圆柱状的线形等离子体,等离子体沿轴向的均匀性与引导天线外径尺寸和两端的模式转换棒的位置有关,当引导天线外径为4 mm,模式匹配棒伸入量为10 mm时,等离子体的不均匀性小于10%。 展开更多
关键词 线形微波等离子体 等离子体诊断 均匀性 引导天线 串联
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金激光等离子体的空间分辨X射线发射谱及其应用 被引量:1
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作者 张继彦 杨国洪 +4 位作者 郑志坚 杨家敏 丁耀南 张文海 李军 《强激光与粒子束》 EI CAS CSCD 北大核心 2003年第10期981-984,共4页
 在星光II激光装置上,采用PET平面晶体谱仪与宽20μm的狭缝构成一维空间分辨光谱测量系统,对金平面靶激光等离子体进行观测,获得了沿靶面法向一维空间分辨的金M带发射谱。在实验谱中观察到了Au元素类Ni离子的电四极跃迁线3p63d10(1S0) ...  在星光II激光装置上,采用PET平面晶体谱仪与宽20μm的狭缝构成一维空间分辨光谱测量系统,对金平面靶激光等离子体进行观测,获得了沿靶面法向一维空间分辨的金M带发射谱。在实验谱中观察到了Au元素类Ni离子的电四极跃迁线3p63d10(1S0) 3p53d104d(3/2,5/2)J=1。利用电四极跃迁线对电子密度的敏感特性,开展了金激光等离子体电子密度诊断的尝试,确定出利用该谱线进行电子密度诊断的有效范围大致在1019~4.5×1021cm-3之间。 展开更多
关键词 金激光等离子体 电四极跃迁线 空间分辨 等离子体诊断 电子密度
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用于等离子体波研究的微波相干散射系统 被引量:2
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作者 曹金祥 俞昌旋 《电子学报》 EI CAS CSCD 北大核心 1992年第3期90-93,共4页
本文介绍了一种新颖的角分辨微波相干散射系统。该系统使用了介质分束片,可以方便地进行散射角扫描。利用该系统测量等离子声波的色散关系和系统的波数分辨率,实验证明,该系统适用于研究波长较长的等离子体静电波和不稳定性。
关键词 微波散射 等离子体 诊断 声波
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短期胰岛素泵强化治疗对新诊断2型糖尿病的影响 被引量:3
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作者 陈竑 宋钦华 +2 位作者 王转锁 陈小盼 朱洪 《中国热带医学》 CAS 2007年第8期1353-1354,共2页
目的观察新诊断2型糖尿病短期使用胰岛素泵强化治疗后血脂、胰岛β细胞功能的变化。方法对新诊断2型糖尿病46例,用胰岛素泵进行持续皮下胰岛素输注(CSII)治疗2周,采用自身前后对照,分析评价治疗前后血糖、血脂、胰岛β细胞功能改变情况... 目的观察新诊断2型糖尿病短期使用胰岛素泵强化治疗后血脂、胰岛β细胞功能的变化。方法对新诊断2型糖尿病46例,用胰岛素泵进行持续皮下胰岛素输注(CSII)治疗2周,采用自身前后对照,分析评价治疗前后血糖、血脂、胰岛β细胞功能改变情况。结果46例患者经强化治疗2周,高血糖状态得以控制,空腹及餐后2h血糖均达良好控制,Homaβ较治疗前明显提高,HomaIR较治疗前明显下降。血清总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、甘油三脂(TG)均较治疗前明显降低,高密度脂蛋白胆固醇(HDL-C)有明显升高,差异有统计学意义。结论短期胰岛素泵强化治疗对新诊断2型糖尿病患者,具有快速良好控制血糖,改善胰岛β细胞功能和改善脂质代谢作用。 展开更多
关键词 新诊断2型糖尿病 胰岛素泵 血糖 血脂 胰岛Β细胞功能
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