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Particle concentration effect in adsorption/desorption of Zn(Ⅱ) on anatase type nano TiO_2

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Journal of Environmental Sciences 2007年第12期19卷 1442-1445页

作者： YANG Yu-huan CHEN Hao pan Gang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

Adsorption/desorption in a new Zn（Ⅱ）-TiO2 adsorption system was investigated at different particle concentrations （Cp）. TEM, SEM and XRD analyses revealed that the TiO2 particles were an aggregation of nano-sized （approximately 10 nm） pure anatase-type TiO2. Adsorption experiments were carried out with particle concentrations of 100, 400 and 1000 mg/L, and their adsorption isotherms were found to decline successively, showing an obvious Cp effect. Desorption experiments indicated that adsorption in this system was irreversible, and the irreversibility increased with increasing Cp. These phenomena could be explained by the MEA （metastable equilibrium adsorption） theory and the Cp effect could be modeled well with an MEA-Freundlich-type Cp effect isotherm equation. This study may heln understand environmental behavior of contaminants on ultrafine natural particles.

关键词： Zn(Ⅱ) anatase-type Ti02 particle concentrations effect adsorption desorption

Synchronization in Dynamic Networks with Time-varying Delay Coupling Based on Linear Feedback Controllers

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自动化学报 2010年第12期36卷 1766-1772页

作者： pan huan NIAN Xiao-Hong GUI Wei-Hua School of Information Science and Engineering Central South UniversityChangsha 410075P.R.China

This paper focuses on the synchronization problems of general complex dynamical networks with time-varying *** cases of the time-varying delay are considered — one being continuous-uniformly bounded and the other being differentiable-uniformly bounded with the *** the coupling configuration matrix is also assumed to be asymmetric and *** new delay-dependent synchronization criteria are derived and a strategy for synchronization is presented based on a method of linear state feedback *** bounds of controller are solved by *** examples are given to illustrate the effectiveness of the proposed synchronization criteria

关键词：自动化线性系统自动模拟理论

Antioxidative Effect of Luteolin Pretreatment on Simulated Ischemia/Reperfusion Injury in Cardiomyocyte and Perfused Rat Heart

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Chinese Journal of Integrative Medicine 2017年第7期23卷 518-527页

作者： ZHANG Rui-qu LI Dong-ye XU Tong-da ZHU Sha-sha pan huan-jun FANG Fang WU Xin SUN Hong Institute of Cardiovascular Disease Research Xuzhou Medical College Xuzhou Jiangsu Province 221002 China Department of Physiology Xuzhou Medical College XuzhouJiangsu Province 221002 China

Objective：To investigate the antioxidative effect and mechanism of luteolin on rat cardiomyocytes and isolated hearts fol owed by simulated ischemia/reperfusion（SI/R） injury. Methods：The left ventricular cardiomyocytes and the isolated hearts from adult rats were subjected to SI/R injury. The experiment groups included control, SI/R, luteolin ＋ SI/R（Lut ＋ SI/R）, vitamin E（Vit E）＋ SI/R, and LY294002 ＋ luteolin ＋ SI/R（LY ＋ Lut ＋ SI/R） groups. Cell viability, shortening amplitude, lactate dehydrogenase（LDH） release, superoxide dismutase（SOD） activity, the production of reactive oxygen species（ROS） and malondialdehyde（MDA）, expression levels of Akt, phosphorylated Akt, NOX2（gp91phox）, NOX2 m RNA, mitogen-activated protein kinase（p38 MAPK） and phosphorylated p38 MAPK were al measured after 3-h simulated ischemia and 2-h simulated reperfusion procedure in cardiomyocytes. Vit E was used as a standard control. The contractile function of isolated hearts was further observed after they were subjected to 30-min global ischemia and 120-min reperfusion. Results：Pretreatment with 8-μmol/L luteolin substantially increased cel viability and shortening amplitude, while reducing evidence of oxidative stress-induced damage in the cel s. In addition, the expression of NOX2, NOX2 m RNA and phosphorylation of p38 MAPK were al downregulated. Furthermore, pretreatment with 40-μmol/L luteolin improved the recovery of myocardial contractile function fol owing SI/R-induced injury, and luteolin markedly increased phosphorylation of Akt. However, all of the above effects were partially inhibited by the phosphatidylinositol 3-kinase（PI3K） inhibitor, LY294002. Conclusions：Luteolin prevents SI/R-induced myocardial damage by reducing oxidative stress-induced injury in isolated rat hearts and cardiomyocytes, and the cardioprotection induced by luteolin was partial y mediated by the PI3K/Akt pathway.

关键词： luteolin cardiomyocyte ischemia/reperfusion cardioprotection

Theoretical prediction of cosmological constant ∧ in Veneziano ghost theory of QCD

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Frontiers of physics 2012年第4期7卷 471-480页

作者： Wei-Xing Ma Li-Juan Zhou Tong-Quan Yuan Jin-Song Peng Xiao Lu Ji-huan pan Guang-Xiong Peng Cheng-Ju Meng Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China Department of Physics and Electronic Engineering HeChi University Yizhou 546300 China College of Physics and Technology Guangxi Normal University Guilin 5~100~ China

Based on the Veneziano ghost theory of QCD, we predict the cosmological constant A, which is related to energy density of cosmological vacuum by A = 3-8tG/pA. In the Veneziano ghost theory, the vacuum energy density PA is expressed by absolute value of the product of quark vacuum condensate and quark current mass： PA = 2g/Hclmq（OI ： qq ： 10）l- We calculate the quark local vacuum condensates （01 ： qq ： 10） by solving Dyson Schwinger Equations for a fully dressed confining quark propagator S/（p） with an effective gluon propagator G^b（q）. The quark current mass mq is predicted by use of chiral perturbation theory. Our theoretical result of A, with the resulting （01 ： qq ： ]0} = -（235 MeV）3 and light quark current mass rnq = 3.29 6.15 MeV, is in a good agreement with the observable of the A =10-52 m-2 used widely in a great amount of literatures. Keywords cosmological constant A, Veneziano sate, quantum chromodynamics （QCD） ghost theory of QCD, local quark vacuum conden-

关键词： cosmological constant A Veneziano ghost theory of QCD local quark vacuum conden-sate quantum chromodynamics (QCD)

基于并行融合深度残差收缩网络的有源配电网故障诊断

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综合智慧能源 2024年第6期46卷 8-15页

作者：冯骥杨国华史磊潘欢陆宇翔张元曦李祯宁夏大学电子与电气工程学院银川750021 宁夏电力能源安全重点试验室银川750004

针对含分布式电源的配电网故障呈现方式多样化以及故障诊断易受分布式电源类型、输出功率等非线性因素影响等问题,提出一种基于并行融合深度残差收缩网络(P-FDRSN)的故障诊断模型。首先,构建具有故障识别支路和故障定位支路的并行网络... 详细信息

针对含分布式电源的配电网故障呈现方式多样化以及故障诊断易受分布式电源类型、输出功率等非线性因素影响等问题,提出一种基于并行融合深度残差收缩网络(P-FDRSN)的故障诊断模型。首先,构建具有故障识别支路和故障定位支路的并行网络结构——P-FDRSN,在残差模块中引入收缩机制,减少网络中噪声或冗余信息的影响,提高网络对噪声的鲁棒性;其次,将故障录波信号波形幅值变化转换为灰度图和时频图,送入深度残差收缩网络进行深度特征提取并在汇聚层中将获取的特征进行融合,以增强故障录波信号的特征学习能力。仿真结果表明:在不同分布式电源类型和不同输出功率下,模型故障定位与识别精度均能保持在98.75%和97.25%以上,即使在噪声干扰的情况下,诊断准确率仍可保持在96.75%以上,模型具有较高的精度和较好的自适应性。

关键词：有源配电网分布式电源故障诊断并行网络结构并行融合深度残差收缩网络

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目标导向液体治疗在胸腔镜肺癌根治术中的应用

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广东医科大学学报 2024年第1期42卷 89-92页

作者：梁大顺王永发卓明词潘焕滨莫娴广东省农垦中心医院麻醉科广东湛江524002

目的探讨目标导向液体治疗(GDFT)在胸腔镜肺癌根治术中的应用价值。方法94例行胸腔镜肺癌根治术患者随机分为观察组和对照组。观察组采用GDFT,对照组采用常规液体治疗。比较两组患者围术期的血流动力学指标、术中肺通气功能指标、手术... 详细信息

目的探讨目标导向液体治疗(GDFT)在胸腔镜肺癌根治术中的应用价值。方法94例行胸腔镜肺癌根治术患者随机分为观察组和对照组。观察组采用GDFT,对照组采用常规液体治疗。比较两组患者围术期的血流动力学指标、术中肺通气功能指标、手术观察指标和认知功能。结果在单肺通气1 h和术毕即刻,观察组的平均动脉压(MAP)、中心静脉压(CVP)、呼吸指数(RI)均明显低于对照组,而脑氧饱和度(rSO_(2))和氧合指数(OI)均明显高于对照组(P<0.05或0.01)。观察组胶体补液量、晶体补液量、尿量、补液总量均明显少于对照组,使用血管活性药物构成比低于对照组(P<0.05或0.01)。术后1 d时,观察组的智力状态检查量表(MMSE)评分明显高于对照组,认知功能障碍发生率低于对照组(P<0.05)。结论在胸腔镜肺癌根治术中采用GDFT能够稳定血流动力学,控制容量负荷,减少血管活性药物的使用率,减轻肺通气功能损伤和降低认知功能障碍发生率。

关键词：胸腔镜肺癌根治术目标导向液体治疗

Birth Control and Family Planning in China

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Women of China 1996年第12期 20-21页

作者： XIAO huan pan ZHONGMING

THIS year, Women of China asked two 30-year-old women from the Yimeng mountain area in Shandong Province about their chosen methods of birth control. Both women reported using intrauterine devices (IUDs), which they had placed by local gynecologists at the hospital 40 days after giving birth. Are these women aware of other contraceptive methods? Some rural women tell us they know of other methods such as oral contraception, contraceptive implants and tubal ligation.

关键词： In IUD Birth Control and Family Planning in China

Consensus of double-integrator discrete-time multi-agent system based on second-order neighbors’ information

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Consensus of double-integrator discrete-time multi-agent sys...

Synchronization of perturbed chaotic systems via nonlinear control

第26届中国控制与决策会议

作者： huan pan Wenjuan Qiao School of Physics Electrical Information Engineering and Ningxia Key Laboratory of Intelligent Sensing for Desert Information Ningxia University

ISBN: (纸本)9781479937097

The consensus of double-integrator discrete-time multi-agent system is studied based on the second-order neighbors’ information in this paper. The comparison between the convergence rate of second-order neighbor protocol and the one of general protocol is analyzed. Considering there exists delay in communication, the consensus condition of double-integrator discrete-time multi-agent system with delay is derived by using LMI. Numerical examples are given to illustrate the effectiveness of the proposed methods.

关键词： Consensus Discrete multi-agent system Second-order neighbors’ information Delay

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Journal of Central South University 2012年第10期19卷 2803-2809页

作者：郭凌年晓红潘欢 School of Information Science and Engineering Central South University

Chaos synchronization of systems with perturbations was investigated.A generic nonlinear control scheme to realize chaos synchronization of systems was *** control scheme is flexible and practicable,and gives more freedom in designing controllers in order to achieve some desired *** the aid of Lyapunov stability theorem and partial stability theory,two cases were presented:1) Chaos synchronization of the system without perturbation or with vanishing perturbations;2) The boundness of the error state for the system with nonvanishing perturbations satisfying some ***,several simulations for Lorenz system were provided to verify the effectiveness and feasibility of our *** numerically with the existing results of linear feedback control scheme,the results are sharper than the existing ones.

关键词： chaotic system synchronization perturbations nonlinear control scheme linear feedback scheme