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X-ray spectra induced by slow highly charged Ar^(q+) ions in collision with Nb surface

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science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1463-1469页

作者： YANG ZhiHu1, CUI Ying2, CHEN XiMeng2, SONG ZhangYong1, SHAO JianXiong2, RUAN FangFang1, ZHANG HongQiang2, DU Juan2, LIU YuWen2, GAO ZhiMing2, ZHANG XiaoAn3, ZHU KeXin1, YU DeYang1 & CAI XiaoHong1 1 Institute of Modern Physics, Chinese Academy of sciences, Lanzhou 730000, china 2 Department of Modern Physics, Lanzhou university, Lanzhou 730000, china 3 Department of Physics, Xianyang Normal college, Xianyang 712000, china Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Department of Modern Physics Lanzhou University Lanzhou China Department of Physics Xianyang Normal College Xianyang China

The X-ray spectra of Nb surface induced by Arq+ (q =16,17) ions with the energy range from 10 to 20 keV/q were studied by the optical spectrum technology. The experimental results indicate that the multi-electron excitation occurred as a highly charged Ar16+ ion was neutralized below the metal surface. The K shell electron of Ar16+ was excited and then de-excited cascadly to emit K X-ray. The intensity of the X-ray emitted from K shell of the hollow Ar atom decreased with the increase of projectile kinetic energy. The intensity of the X-ray emitted from L shell of the target atom Nb increased with the increase of projectile kinetic energy. The X-ray yield of Ar17+ is three magnitude orders larger than that of Ar16+.

关键词： highly charged ion hollow atom multi-electron X-ray

A blood pressure measurement method based on synergetics theory

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Journal of Measurement science and Instrumentation 2010年第S1期1卷 155-159,150页

作者： Hong-jin GUO,Jian-jun HAO,Ting WANG,Zhi-xin CHENG (college of Information and Electronical Engineering,Shandong university of science and Technology,Qingdao 266510,china) college of Information and Electronical Engineering Shandong University of Science and Technology

The principle for blood pressure measurement using pulse transit time is introduced in this *** the math model of synergetics theory is studied in *** synergetics theory is applied in the analysis of blood pressure measurement *** simulation results show that the application of synergetics theory is helpful to judge the normal blood pressure,and the accuracy is up to 80%.

关键词： pulse wave synergetics theor Blood pressure measurement

Effect of Cross-linking Agent on Barbituric Acid-initiated Resin

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Journal of Materials science & Technology 2001年第1期17卷 27-28页

作者： Eun-Kyung Lee Hwan-Wook Ra and Kyo-Han Kim Department of Dental Biomaterials, college of Dentistry, Kyungpook National university, Taegu 700-422, Korea Inn-Kyu Kang Department of Polymer Engineering, college of Engineering, Kyungpook National university, Dep. of Dental Biomater. Coll. of Dentistry Kyungpook Natl. Univ. Taegu 700-422 South Korea

To improve the tensile bond strength of denim bonding agents, the adhesion between denim and MMA resin was investigated by applying initiator systems containing 1-cyclohexyl-5-ethyl barbituric acid (CEB), copper acetyl acetonate (CAA), quaternary ammonium chloride (QAC). cupric ion, with the addition of TEGDMA, an.d pretreatment solution for denim, and an HEMA primer. The effects of a cross-linking agent on barbituric acid-initiated denim bonding resin were examined by measuring degree of conversion, molecular weight, hardness of bonding resin, and tensile bond strengths.

关键词： Figure Effect of Cross-linking Agent on Barbituric Acid-initiated Resin FTIR

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LOCAL 2-COCYCLES

Applied Mathematics(A Journal of Chinese Universities) 2002年第3期17卷 284-290页

作者： Zhang JianhuaFaculty of science,Xi’an Jiaotong university,Xi’an 710049,china. college of Math. and Inform. Sci., Shaanxi Normal Univ., Xi’an 710062,china. Faculty of science Xi’an Jiaotong University Xi’an China college of Math. and Inform. Sci. Shaanxi Normal Univ. Xi’an China

The aim of this paper is to show that every local 2-cocycle of a von Neumann algebra R with coefficients in S (a unital dual R-bimodule) is a 2-cocycle.

关键词： cocycle local 2-cocycle von Neumann algebra. Partially supported by the National Natural science Foundation of china (10071047).

Robust stability criteria of neutral systems with time varying delay and nonlinear uncertainties

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Robust stability criteria of neutral systems with time varyi...

2009中国控制与决策会议

作者： Li Tai-fang~1,Xu Zhao-di2 1.college of Mathematics and Systems science,Shenyang Normal university,Shenyang 110034,china 2.college of Mathematics and Systems science,Shenyang Normal university,Shenyang 110034,china

＜正＞This paper investigates the robust stability for a class of uncertain neutral system with time-varying delay and nonlinear uncertainties.A new delay-dependent stability criteria is presented by using Lyapunov *** stability criteria for such systems in terms of linear matrix inequalities（LMIS）.Some numerical examples show that the effectiveness and the significantly important over some existing results.

关键词： Robust stability neutral system time-varying nonlinear uncertainties

For a Class of Linear Systems LMI-Based Design of Reliable Tracking Control

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For a Class of Linear Systems LMI-Based Design of Reliable T...

2010 Chinese Control and Decision Conference

作者： Bo Yao~1,Fuzhong Wang~2,Shuai Wang~3 1.college of Mathematics and System science,Shenyang Normal university,Shenyang,110034,china 2.Shenyang Institute of Engineering,Shenyang 110136,china 3.School of life sciences,Xiamen university,Xiamen 361005,china

＜正＞For a class of linear systems,the paper studies the reliable tracking controller design problem against actuator faults.A sufficient condition for the existence of a reliable tracking controller is *** a reliable tracking controller design method is *** method is based on linear guaranteed cost tracking performance index and linear matrix inequalities（LMIs）.The simulation illustrates the design procedures and their *** comparisons of the reliable tracking controller and the normal tracking controller show the necessity of reliable tracking control.

关键词： reliable tracking controller actuator faults guaranteed cost linear matrix inequalities

Nano-Ag inhibiting action potential independent glutamatergic synaptic transmission but increasing excitability in rat CA1 pyramidal neurons

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Nano-Ag inhibiting action potential independent glutamatergi...

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Zhao-Wei LIU~1,Guo-Gang REN~3,Tao ZHANG~2,Zhuo YANG~(1,*) 1 college of Medicine,Key Laboratory of Bioactive Materials,Ministry of Education,Nankai university,Tianjin 300071, china 2 science and Technology Research Institute,university of Hertfordshire,Hatfield,Herts AL10 9AB,UK 3 college of life science,Nankai university,Tianjin 300071,china

＜正＞Objective The application of the nano-sized materials continues to grow at a rapid rate in the fields of medicine, biotechnology and environmental ***,their toxicology effects on humans and animals have been reported with risk assessments of *** aim of this study was to investigate the actions of silver nanoparticles （nano-Ag） on glutamatergic synaptic transmission and excitability in hippocampal CA1 pyramidal neurons. Methods Whole cell patch technique was used in the present *** The amplitude of action potential independent glutamatergic currents（miniature excitatory postsynaptic currents,mEPSCs） was inhibited by silver nanoparticles （nano-Ag 10-5 g/mL）,but the amplitude and frequency of action potential dependent glutamatergic currents （spontaneous excitatory postsynaptic currents,sEPSCs） were increased by nano-Ag ***,nano-Ag increased the spontaneous network activity without changing the threshold potential and rest membrane potential. Conclusion These results provide further insights into the underlying mechanisms responsible for the effects of nanoAg on central nervous system（CNS）.They must be valuable for the potential and safe applications for nano silver.

关键词： nano-Ag neurons mEPSCs sEPSCs spontaneous action potential

Theoretical Studies of Hypochlorous Acid-induced Base Modifications

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Theoretical Studies of Hypochlorous Acid-induced Base Modifi...

第五届全国化学生物学学术会议

作者： Chun Lin Lü Yong Dong Liu~* Ru Gang Zhong college of life science & Bioengineering,Beijing university of Technology,Beijing 100022

Hypochlorous acid(HOC1),endogenously generated from oxidation of Cl ion,plays an important role in bacterial cell *** the other hand,HOCl may cause host tissue damage by reacting with cellular *** of DNA by HOC1 can l... 详细信息

关键词： DNA HOCl Chorination

Study on the Flow Injection Micro-Column Pre-Separation System Coupled With High Performance Liquid Chromatography for the Determination of Ecdysterone in Traditional Chinese Medicine

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Wuhan university Journal of Natural sciences 2000年第1期5卷 83-88页

作者： SHUAI Qin QIN Yong-chao JIANG Zu-cheng LI Feng LIAO Zhen-huan (college of Chemistry and Environmental science, Wuhan university, Wuhan 430072, china) college of Chemistry and Environmental science Wuhan University Wuhan 430072 China

A flow injection (FI) micro-column system coupled with high performance liquid chromatography (HPLC) was proposed for the pre-separation and determination of active organic component (ecdysterone) in traditional Chinese medicine, Loulu. The factors influencing separation performance were investigated and optimized. Under the optimal conditions, the contents of ecdysterone in Loulu were determined by HPLC system using MeOH-H_2O (40: 60,V/V) as the mobile phase at a flow rate of 1. 0 mL/min. The calibration curve was linear in the range of 0. 5~ 100 mg/L of ecdysterone concentrations. The detection limit of the analyte was 0. 11mol/L(3) with a precision of 0. 38% RSD (n=7 f c= 10. 0 mg/L). The average recovery of the method was 98. 7%. The proposed method has been applied to determine ecdysterone in practical samples, and the determined values by both external standard method and standard addition method were in good agreement. Compared to the traditional solid extraction method, the system proposed has the advantages of simple procedure, good reproducibility, minimum volume requirement, reduction of matrix interference and low contamination risk.

关键词： high performance liquid chromatography(HPLC) Flow injection analysis (FIA) ecdysterone traditional Chinese medicine