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Triple Plasmon Decay of Electromagnetic Pump Wave

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Chinese Physics Letters 1995年第7期12卷 404-407页

作者： hu xiwei Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A fluid description of the triple plasmon decay process has been *** linear and nonlinear analyses suggest that this parameter process will occur very likely at the local area where the plasma density is about n_(c)/*** analyses with saddle point method of integration indicate also that the triple plasmon decay process is absolutely unstable.

关键词： analyses decay absolutely

Special issue on the 70th anniversary of huST

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Plasma Science and Technology 2022年第12期24卷 4-5页

作者： xiwei hu International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electric and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China

huazhong University of Science and Technology (huST) celebrates its 70th anniversary in *** was transferred to a comprehensive and modern university on the international level in the 1980s from its traditional engineering predecessor,huazhong Institute of Technology,founded in the early 1950s as part of China’s academic institution reorganization.

关键词： anniversary 70t transferred

Mechanism of Low Pressure dc Breakdown in a Thermo-Cathode Gas Discharge

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Chinese Physics Letters 1993年第7期10卷 417-420页

作者： hu xiwei CHEN Yang Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A theory about the dc breakdown process of a gas discharge with thermocathode in a very low pressure(10^(-2) Pa)is *** mobility of ions due to ion-neutral charge exchange collisions is mainly responsible for the space cumulative effect of positive charges and the formation of the virtual anode.A numerical result for the breakdown process of the argon gas discharge is given.

关键词： neutral Cathode charges

Global Wave Solution of Generalized MHD Equations in a Cylindrical Plasma

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Chinese Physics Letters 1991年第11期8卷 570-573页

作者： YANG Weihong hu xiwei Department of Moders Physics University of Science and Technology of ChinaHefei230026

The linear eigenstate problem of generaLsed magnetohydrodynamics (MHD) equationg in a cylindrical plasma is *** effects of fnite frequency and finite pressure perturbation lead to an inportant result:the resonant layer of the shear Alfven waves is not a singular *** this paper,the MHD equations are reduced to four differential equations of first order for perturbed *** analytical dispersion relation for a homogeneous plasma cylinder is *** *** theory is a limiting case of our theory.

关键词： theory resonant cylindrical

A New Turbulent Collision Integral in Plasma Kinetic Equation

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Chinese Physics Letters 1992年第4期9卷 183-186页

作者： hu xiwei Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A new turbulent collision integral is derived from the first and second BBGKY equations,in which the effects of well-developed turbulent field are taken into *** turbulent collision integral contains turbulent frequen... 详细信息

关键词： function turbulent collision

糖皮质激素不同给药方式对AECOPD患者临床疗效的影响

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贵州医科大学学报 2024年第1期49卷 139-144页

作者：龙宇刘礼银杨然胡系伟贵州医科大学临床医学院贵州贵阳550004 铜仁市人民医院呼吸与危重症医学科贵州铜仁554300 贵州医科大学附属医院呼吸与危重症医学科贵州贵阳550004

目的探究糖皮质激素不同给药方式在慢性阻塞性肺疾病急性加重期(AECOPD)患者治疗中的临床疗效。方法88例AECOPD患者随机均分为吸入组与静脉组,两组患者均给予抗感染、吸氧、祛痰、解痉平喘、舒张气道等对症支持治疗的基础上,静脉组患者... 详细信息

目的探究糖皮质激素不同给药方式在慢性阻塞性肺疾病急性加重期(AECOPD)患者治疗中的临床疗效。方法88例AECOPD患者随机均分为吸入组与静脉组,两组患者均给予抗感染、吸氧、祛痰、解痉平喘、舒张气道等对症支持治疗的基础上,静脉组患者静脉注射甲泼尼龙琥珀酸钠(40 mg/次、1次/d),吸入组患者雾化吸入布地奈德(2 mg/次、3次/d),两组均治疗7 d;比较两组患者治疗前后动脉血氧分压(PaO_(2))、动脉血二氧化碳分压(PaCO_(2))、第1秒用力呼气容积占预计值百分比(FEV1%)、第1秒用力呼气容积占用力肺活量的比值(FEV1/FVC)、自我评估测试(CAT)评分。结果与治疗前相比,两组患者治疗后PaO_(2)均升高、PaCO_(2)均下降、FEV1%及FEV1/FVC均升高(P<0.05);两组患者CAT评分均较治疗前降低(P<0.05);两组间患者治疗疗效相当,但吸入组不良反应发生率低于静脉组(P<0.05)。结论糖皮质激素治疗AECOPD患者,无论何种给药方式,均可取得良好的治疗效果,但雾化吸入较全身应用不良反应少,安全性更高。

关键词：慢性阻塞性肺疾病急性加重期糖皮质激素不同给药方式肺功能血气分析

痰液中ECP和IL-8对不同EOS分型慢性阻塞性肺疾病急性加重期患者的预测价值

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贵州医科大学学报 2024年第6期49卷 873-881页

作者：犹红胡系伟岳龙飞佟玉峰贵州医科大学临床医学院贵州贵阳550004 贵州医科大学附属医院呼吸与危重症医学科贵州贵阳550004 安顺市人民医院全科医学科贵州安顺561000

目的探讨痰嗜酸性粒细胞阳离子蛋白(ECP)及白细胞介素-8(IL-8)对嗜酸性粒细胞(EOS)增高型及非EOS增高型慢性阻塞性肺疾病急性加重期(AECOPD)患者的临床预测价值,分析以EOS百分比及绝对值分类AECOPD患者的临床特征、炎症指标的差异。方... 详细信息

目的探讨痰嗜酸性粒细胞阳离子蛋白(ECP)及白细胞介素-8(IL-8)对嗜酸性粒细胞(EOS)增高型及非EOS增高型慢性阻塞性肺疾病急性加重期(AECOPD)患者的临床预测价值,分析以EOS百分比及绝对值分类AECOPD患者的临床特征、炎症指标的差异。方法72名AECOPD住院患者根据EOS百分比(EOS%)分为非增高型1组(EOS%0.05);外周血EOS与痰中ECP呈正相关、与痰中IL-8及外周血NLR、NEU、NEUR、CRP、PLR、FAR呈负相关(P<0.05);ROC曲线分析提示,痰ECP及IL-8、外周血NLR、CRP及FAR对于不同EOS分型AECOPD的预测价值具有统计学意义(P<0.05)。结论EOS非增高型AECOPD较EOS增高型AECOPD住院患者的临床症状、炎症反应更严重,更易发生细菌感染,痰中ECP、IL-8及外周血炎症指标对AECOPD患者分型有一定价值。

关键词：肺疾病慢性阻塞性嗜酸性粒细胞嗜酸性粒细胞阳离子蛋白白细胞介素-8

Absorption of electromagnetic wave by inhomogeneous,unmagnetized plasma

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Frontiers of Electrical and Electronic Engineering in China 2009年第2期4卷 210-213页

作者： Ming YAN Keran SHAO Gang LEI xiwei hu National Key Laboratory for Vessel Integrated Power System Technology Navy University of EngineeringWuhan 430033China College of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074China

In this article,a novel and normalized Ztransform finite-difference time-domain(ZTFDTD)method is *** method uses a more general form of Maxwell’s equations using the E,H,D *** iterative model of D-E-H-D can be obtained by using the Z-transform resulted frequency-dependent formula between D and *** advantages of the ZTFDTD consist in that the discrete equations are simple,the results are precise,easy to program and capable of dealing with the key technologies of finite-difference time-domain(FDTD),such as absorbing boundary conditions(uniaxial anisotropic perfectly matched layer,UPML)and near-to-farfield *** ZTFDTD method is then used to simulate the interaction of electromagnetic wave with *** a simplified two-dimensional model,the stealth effect of inhomogeneous,unmagnetized plasma is studied both in different electron densities of plasma,different electromagnetic wave frequencies and different plasma collision *** numerical results indicate that plasma stealth is effective in theory and a reasonable selection with the plasma parameters that can greatly enhance the effectiveness of plasma stealth.

关键词： finite-difference time-domain(FDTD) Ztransform anisotropic perfectly matched layer plasma stealth radar cross section(RCS)

CAR与FAR联合检测对AECOPD患者预后的评估价值

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贵州医科大学学报 2024年第5期49卷 703-709页

作者：吴梅廖婷婷罗璐灵陈宇佳申银胡系伟贵州医科大学附属医院呼吸与危重症医学科贵州贵阳550004 贵州医科大学临床医学院贵州贵阳550004 贵州医科大学附属医院全科医学科贵州贵阳550004

目的探讨C-反应蛋白(CRP)/白蛋白(ALB)比值(CAR)、纤维蛋白原(FIB)/白蛋白(ALB)比值(FAR)联合检测对慢性阻塞性肺疾病急性加重期(AECOPD)患者预后的评估价值。方法选取AECOPD住院患者260例,收集患者性别、年龄、体质量指数(BMI)、是否... 详细信息

目的探讨C-反应蛋白(CRP)/白蛋白(ALB)比值(CAR)、纤维蛋白原(FIB)/白蛋白(ALB)比值(FAR)联合检测对慢性阻塞性肺疾病急性加重期(AECOPD)患者预后的评估价值。方法选取AECOPD住院患者260例,收集患者性别、年龄、体质量指数(BMI)、是否吸烟、是否合并高血压、冠心病、糖尿病基础病、是否并发肺心病等一般资料,抽取患者入院24 h内外周静脉血检测白细胞计数(WBC)、中性粒细胞百分比(N%)、ALB、CRP、FIB及血沉(ESR),并计算CAR和FAR;抽取患者入院时(未吸氧状态下)股动脉或桡动脉血,采用血气分析仪测定动脉血二氧化碳分压(PaCO_(2))、动脉血氧分压(PaO_(2))、动脉血酸碱度(pH);收集患者住院期间吸入支气管扩张后肺功能检查,采用肺功能测定仪测定第1秒用力呼气量(FEV_(1))占用力肺活量(FVC)的百分比(FEV_(1)/FVC)、FEV_(1)占预计值的百分比(FEV_(1)%pred);患者出院后均随访6个月,采用二元logistic单因素及多因素回归分析筛选出影响AECOPD患者预后的危险因素,采用受试者工作特征(ROC)曲线下面积(AUC)评定CAR联合FAR对AECOPD患者预后的预测价值。结果预后不良组AECOPD患者WBC、N%、ESR、CRP、FIB、CAR、FAR、PaCO_(2)高于预后良好组,BMI、ALB、FEV_(1)/FVC、FEV_(1)%pred低于预后良好组,差异均有统计学意义(P<0.05);二元logistic单因素回归分析结果显示,WBC、N%、ESR、CAR、FAR、PaCO_(2)、BMI、FEV_(1)/FVC、FEV_(1)%pred均为影响AECOPD患者预后不良的危险因素;二元logistic多因素回归分析表明,WBC、CAR、FAR、PaCO_(2)及FEV_(1)%pred是AECOPD患者预后不良的独立危险因素;CAR、FAR单项及联合应用预测AECOPD预后不良的AUC分别为0.811、797、0.820,敏感度分别为0.742、0.675、0.550,特异度分别为0.771、0.829、0.950。结论CAR与FAR联合预测AECOPD患者预后的效能优于单项指标,可作为临床评估AECOPD患者预后的重要依据。

关键词：危险因素预测慢性阻塞性肺疾病急性加重期预后不良 C-反应蛋白/白蛋白比值纤维蛋白原/白蛋白比值