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On the dynamics of xn+1=δxn-3.+1+xn-4t+1/A+xn-4t+1

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商丘师范学院学报 2010年第9期26卷 42-46页

作者： HONG Liang1,YANG Yanhua2(1.Institute of physics Electronic engineering,Xinyang normal {3.,Xinyang 464000,china 2.Department of Computer Science,Xinyang Agricultural college,Xinyang 464000,china) Institute of physics Electronic engineering Xinyang Normal UniversityXinyang 464000China Department of Computer Science Xinyang Agricultural CollegeXinyang 464000China

In this paper,we consider the following difference equationxn+1=δxn-3.+1+xn-4t+1/A+xn-4t+1 n=0,1,….where t∈{1,2,…},and the initial values are *** investigate the global character of solutions of the above differen... 详细信息

关键词： difference equation boundedness bounded solution global attractor

激光烧蚀Al热原子与CF_4反应中C_2的形成及其发光光谱研究

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物理学报 2003年第5期52卷 1297-1301页

作者：张树东李海洋中国科学院安徽光学精密机械研究所环境光谱学实验室

脉冲激光烧蚀金属平面铝靶产生的热原子与气相CF4碰撞反应中 ,在 40 0— 60 0nm之间观测到激发态C2 分子的发光光谱 ,它们可归属为Swan带的d3.g-a3.u 跃迁中Δv=2 ,1,0 ,- 1,- 2五个振动序列 (v’≤ 6) .光谱强度分析表明 ,C2 激发态... 详细信息

脉冲激光烧蚀金属平面铝靶产生的热原子与气相CF4碰撞反应中 ,在 40 0— 60 0nm之间观测到激发态C2 分子的发光光谱 ,它们可归属为Swan带的d3.g-a3.u 跃迁中Δv=2 ,1,0 ,- 1,- 2五个振动序列 (v’≤ 6) .光谱强度分析表明 ,C2 激发态的振动温度达 63.40K左右 .与激光烧蚀Al+O2 反应生成AlO的实验结果以及激光烧蚀Cu +CF4的光谱比较 ,对比Al( 2 P1 2 - 2 S1 2 ,3.94 4nm)和C2 的d—a跃迁 ( 0— 0 )带带头 ( 5 16 5nm)的飞行时间轮廓 ,认为激发态的Al( 2 S1 2 )原子通过电子态传能可能是C2

关键词：激光烧蚀 C2 CF4 Al 热原子铝靶四氟化碳碰撞反应发光光谱激发态能级跃迁等离子体谱线碳分子

Semi-Blind Hebb-PPIC Multiuser Detection Algorithm

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Semi-Blind Hebb-PPIC Multiuser Detection Algorithm

2010 Second Asia-Pacific Conference on Information Processing (APCIP 2010)

作者： Li Yanping and Zong Hengshan college of Information engineering Taiyuan university of Technology Shanxi Province {3. Zhang Yongbo physics and Electronics Information college Yan’an university Yan’an {3.

Inter-cell interference greatly impairs the capacity of CDMA system.4G era is coming with much severer inter-cell interference,and it’s important to find a good solution to inter-cell Interference *** this paper,the semi-blind Hebb-PPIC Multi-User Detection（MUD） algorithm which applied in the CDMA uplink is *** approach fully utilizes all known users’ information,performs Hebb-PPIC detector to suppress the int-erferers within the cell,and exploits the blind detector to suppress the inter-cell *** results demonstrate that the proposed Hebb-PPIC semi-blind algorithm offers substantial perfo-rmance gains over the blind multi-user detection methods,and the Multiple Access Interference and Near-Far effect can be suppressed effectively in a CDMA uplink environment.

关键词： Inter-cell interference Hebb-PPIC Multi-user Detection

Effect of local hyperthermia induced by nanometer magnetic fluid on the rabbit VX2 liver tumor model

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Progress in Natural Science:Materials International 2009年第12期19卷 1705-1712页

作者： Lehui Du~(a,b),Jumei Zhou~(a,b),Xiaowen Wang~b,Lin Sheng~c,Guihua Wang~(a,b),Xiaoxue Xie~(a,b), Guoquan Xu~(b,d),Lingyun Zhao~b,Yuping Liao~a,Jingtian Tang~(a,b,*) a Department of Oncology,Xiang Ya Hospital of Central South university,Changsha 410008,china b Department of engineering {3.,Tsinghua university Key Laboratory of Particle & Radiation Imaging(Tsinghua university), Ministry of Education,Beijing 100084,china c Division of Radiofrequency Alation,Yuquan Hospital of Tsinghua university,Beijing 100049,china d Department of Stomatology of Jia Musi Medical college,Jia Musi 154003.china Department of Oncology XiangYa Hospital of Central South University Changsha 410008 China Department of engineering physics Tsinghua University Key Laboratory of Particle & Radiation Imaging (Tsinghua University) Ministry of Education Beijing 100084 China Division of Radiofrequency Alation Yuquan Hospital of Tsinghua University Beijing 100049 China Department of Stomatology of Jia Musi Medical college Jia Musi 154003 China

Hyperthermia induced by magnetic nanoparticles is a recent therapeutic approach for local targeting of hyperthermia and thermoablation and is a promising treatment of malignant *** purpose of this study is to evaluate the potential and therapeutic effect of magnetic fluid hyperthermia on the rabbit VX2 liver tumor *** bearing liver tumors 14 days after tumor implantation were randomly divided into five groups of 10 cases each,including three control groups and two hyperthermia *** was carried out immediately after a single intratumoral injection of uncoated water-based Fe3.4magnetic fluid under an alternating magnetic field only once as one hyperthermia group and repeated hyperthermia after 5 days as the other treated *** distribution of magnetic fluid was evaluated by CT *** animals were sacrificed 4 weeks after tumor *** therapeutic effect was determined by tumor size and macroscopic and pathological examination of the liver *** local higher density imaging of intratumoral magnetic fluid deposits compared to the surrounding tissue was clearly observed by CT ***-eight days after tumor implantation, the tumor maximal diameter and tumor volume of two hyperthermia were both significantly less than those of control groups (P3.79.91%and 92.3.-94.46%(Pnormal tissue can be achi

关键词： Magnetic fluid Hyperthermia Rabbit VX2 tumor Liver cancer Alternating magnetic field

网络环境下电网静态安全分析系统的研究与开发

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计算机工程与应用 2003年第36期39卷 201-203,226页

作者：祝永志曹宝香赵景秀齐邦强曲阜师范大学计算机科学学院曲阜273165

日益复杂的电力系统,发生故障的概率在增加,某些扰动可能导致大面积停电和稳定性问题尖锐化。论文针对原有的电力系统网络拓扑分析中的问题,提出了一种新的快速网络拓扑分析方法,利用***开发了一个网络环境下电网静态安全分析系统。

关键词：电力系统电网静态安全分析系统网络环境稳定性潮流计算

The Characteristic of Absorption Spectra of Cyanine Dye J-Aggregate

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The Characteristic of Absorption Spectra of Cyanine Dye J-Ag...

第三十五届国际光谱会议

作者： F.H.Xiang ~(1*) W.S.Zhang~2 ~1School of physics and electronics information,Langfang normal college,Langfang 065000,{3. ~2college of underwater acousti engineering,Harbin engineering university,Harbin 150001,{3.

＜正＞The absorption spectra can reflect the aggregation property of dye in medium and on the surface of *** years,the detailed discussion and experiment research have been carried on about absorption spectra of different dye J-aggregates[1～5],however,the absorption spectra changing law on green-sensitizing dye under different concentration and different sensitizing time has not been detailed *** this paper,the absorption spectra of cyanine dye were determined in different medium by the spectrophotometer.

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Improvement of sensitivity of graphene photodetector by creating bandgap structure

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Chinese physics B 2017年第11期26卷 429-433页

作者：张倪侦何孟珂余鹏周大华 Chongqing Key Laboratory of Photo-Electric Functional Materials College of Physics and Electronic EngineeringChongqing Normal University Chongqing Key Laboratory of Multi-scale Manufacturing Technology Chongqing Institute of Green and Intelligent TechnologyChinese Academy of Sciences

Graphene has aroused large interest in optoelectronic applications because of its broad band absorption and ultrahigh electron mobility. However, the low absorption of 2.3. seriously limits its photoresponsivity and restricts the relevant applications. In this paper, a method to enhance the sensitivity of graphene photodetector is demonstrated by introducing electron trapping centers and creating a bandgap structure in graphene. The carrier lifetime obviously increases, and more carriers are collected by the electrodes. Compared with intrinsic graphene detector, the defective graphene photodetector possesses high photocurrent and low-driving-voltage, which gives rise to great potential applications in photodetector area.

关键词： graphene photodetector photocurrent bandgap

Three Dimension Vision of Laser Image

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Three Dimension Vision of Laser Image

2007亚洲显示国际会议

作者： Caicheng Shi~1 Cuifang Zhao~(1 2) Xiaoqiong Li~1 1 Department of Electronic engineering Beijing Institute of Technology Beijing 100081 china 2 Department of Electronic engineering {3. of Mathematics physics and Information engineering Zhejiang normal university Jinhua 3.1004 china

＜正＞The Laser Radar（Lidar）system provides much important information for manual target detection and *** offers many advantages over other optical systems,such as intensity,range,azimuth,pitching and *** this pa- per,a novel approach is presented for the development of the 3. Lidar image *** working principle and the main components are *** data of Lidar contains azimuth,pitching,velocity,distance and *** two dimen- sion image of Lidar is mapped by three dimension reference frame *** present the bogus color relies on only intensity or *** according to human vision system theories,the color display was based on *** estab- lished model of Lidar RGB correlates to the range resolution and quantizing bit of *** scheme has great capabili- ty on calculating and *** the software implement of algorithm can be *** results show that the method not only works well for the application with real-time,reliability,and flexible architecture,but also pro- vides a performance in full saturated colors,higher contrast ratio and high resolution.

关键词： Laser Radar(Lidar) Three Dimension Image Vision

Performance Analysis of Alamouti Scheme With Imperfect Multiple Transmit Antennas Selection in Rayleigh Fading Channel

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Performance Analysis of Alamouti Scheme With Imperfect Multi...

2006 7th International Symposium on Antennas, Propagation and EM Theory

作者： Zhuang Mingjie Lin Bihong (Information college, Huaqiao university, Quanzhou, Fujian, 3.2021, P. R china) (Information {3. college, Jimei university, Xiamen 3.1021, P. R. china) (Department of physics, Quanzhou normal university, Quanzhou 3.2000, R R. china)

In a multiple-input-single-output (MISO) communications system, we take the presence of the erroneous channel state information (CSI) into consideration. Multiple transmit antennas selection (TAS) over MSO systems with Alamouti space-time scheme is investigated, and a solution over order statistic characteristic of the selective channel with CSI feedback error is proposed. We assume that channel is an independent and flat Rayleigh fading channel and the system employs Binary Phase-Shift Keying (BPSK) modulation. The accurate analytical expressions of bit-error rate (BER) of Alamouti scheme with TAS have been derived. The analysis results show that when the error is existed in CSI we ought to try to choose the subset consisting of largest ordinal number as transmit in a practical system.

关键词： Alamouti space-time scheme, transmit antennas selection, CSI, BER, ordinal number, Rayleigh fading channel