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Tripartite Entanglement via Microwave Driven Atomic Coherence

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Chinese Physics Letters 2010年第4期27卷 45-48页

作者：金丽霞吕新友宋佩君杨晓雪 School of Physics Huazhong University of Science and Technology Wuhan 430074 chool of Physics Ludong University Yantai 264025

We propose a new scheme to achieve the tripartite entanglement based on the standard criteria [Phys. Rev. A 67（2003） 052315] in a inverse-tripod atomic system. In our scheme, the atomic coherence is introduced by two microwave fields which drive the upper three levels of atom. By numerically simulating the dynamics of system, we investigate the generation and evolution of entanglement in the presence of atom and cavity decay. As a result, the present research provides an efficient approach to achieve fully tripartite entanglement with different frequencies and initial states for each entangled mode, which may have impact on the progress of multicolored multi-notes quantum information networks.

关键词： Computational physics Optics quantum optics and lasers Quantum information and quantum mechanics

High performance scalable image coding

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Journal of Systems Engineering and Electronics 2007年第4期18卷 795-800页

作者： Gan Tao He Yanmin Zhu Weile chool of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

A high performance scalable image coding algorithm is proposed. The salient features of this algorithm are the ways to form and locate the significant clusters. Thanks to the list structure, the new coding algorithm achieves fine fractional bit-plane coding with negligible additional complexity. Experiments show that it performs comparably or better than the state-of-the-art coders. Furthermore, the flexible codec supports both quality and resolution scalability, which is very attractive in many network applications.

关键词： scalable image coding significant clusters list structure

Analysis of status quo and research progress in nursing of postpartum fatigue: a literature review

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Frontiers of Nursing 2020年第1期7卷 71-76页

作者： Tian-Tian Gai Meng-Xi Gao Wei Fan Yan Wang Graduate School Tianjin University of Traditional Chinese MedicineTianjin 300000China chool of Nursing Tianjin University of Traditional Chinese MedicineTianjin 300000China

Postpartum fatigue is an important issue that threatens women’s *** incidence of postpartum fatigue is *** to intervene in time may lead to adverse outcomes such as postpartum depression,premature termination of breastfeeding,child abuse,and low infant *** article reviews the concepts,characteristics,related factors,adverse effects,and interventions of postpartum *** aim is to improve doctors’and nurses’awareness of on postpartum fatigue in pregnant women,enrich the research content and methods,stimulate the interest of nurses,and actively carry out targeted intervention research to prevent or reduce the occurrence of adverse outcomes.

关键词： postpartum fatigue maternal postnatal pregnancy nursing current status research progress

Technical Design of Arc-Discharge and Deceleration Power Supply for MW Level NBI System on HL-2A Tokamak

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Plasma Science and Technology 2012年第10期14卷 936-940页

作者：陈文光饶军李波雷光玖曹建勇王明伟康自华冯鲲 HL-2A NBI Group chool of Electrical Engineering University of South ChinaHengyang 421001China Southwestern Institute of Physics Chengdu 610041China

Neutral beam injection （NBI） is one of the most effective ways to heat and drive plasma in a tokamak. The mega watt level neutral beam injector on the HL-2A tokamak consists of four high-power ion sources. Each source is supplied by discharge, beam extraction and auxiliary power supplies. Some circuit topologies and control sequences designed for the system are presented in this paper. Some important technologies such as the notching circuit, insulated gate bipolar transistor （IGBT） series-connected switch, high-frequency switching power supply and control system based on a digital signal processor （DSP） have been used. The system can be effectively used for high current ion beam extraction, protection, ion optics and so on. The power system has been safely used in HL-2A high-parameter NBI experiments for three years. The power of NBI can be kept at higher than 0.75 MW for 1 second and the ion beam power extracted from the ion source is higher than 2 MW. The ion temperature of the plasma center is close to 2.0 keV. These results show that the design of this power system is reasonable and reliable, and it can fully meet the system requirements for NBI of the HL-2A tokamak.

关键词： HL-2A neutral beam injector neutral beam injection power supply controlsequence

Experimental study on the 3D vibrated packing densification of binary sphere mixtures

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Particuology 2016年第4期14卷 110-114页

作者： Xizhong An Chao Li Quan Qian ~chool of Materials and Metallurgy Northeastern University Shenyang 110004 China Anshan Iron and Steel Group Corporation Yingkou 115007 China

The packing densification of binary spherical mixtures under 3D mechanical vibration was studied experimentally. The influences of vibration frequency （ω）, volume fraction of large spheres （XL）, sphere size ratio （r, diameter ratio of small to large spheres）, and container size （D） on the random binary packing density （p） were systematically analyzed. For any given set of conditions, there exist optimal ω and XL to realize the densest random binary packing; too large or small ω and XL is not helpful for densification. The influences of both r and D on p are monotonic; either reducing r or increasing D leads to a high value of p. With all other parameters held constant, the densest random packing occurs when XL is dominant, which is in good agreement with the Furnas relation. Moreover, the highest random binary packing density obtained in our work agrees well with corresponding numerical and analytical results in the literature.

关键词： Particle packing Binary spherical mixtures 3D vibration Densification Size ratio

Fractal Characteristics and Prediction of Ti-15-3 Alloy Recrystallized Microstructure

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Journal of Materials Science & Technology 2008年第6期24卷 835-839页

作者： Ping LI Qing ZHANG Kemin XUE chool of Materials Science and Engineering Hefei University of Technology Hefei 230009 China Anhui Vocational and Technical College Hefei 230051 China

Grain shape of the hot deforming alloy is an important of material. The fractal theory was applied to analyze index to character the microstructure and performance the recrystallized microstructure of Ti-15-3 alloy after hot deformation and solution treatment. The fractal dimensions of recrystallized grains were calculated by slit island method. The influence of processing parameters on fractal dimension and grain size was studied, It has been shown that the shapes of recrystallized grain boundaries are self-similar, and the fractal dimension varies from 1 to 2. With increasing deformation degree and strain rate or decreasing deformation temperature, the fractal dimension of grain boundaries increased and the grain size decreased. So the fractal dimension could characterize the grain shape and size. A neural network model was trained to predict the fractal dimension of recrystallized microstructure and the result is in excellent agreement with the experimental data.

关键词： Ti-15-3 alloy Hot deformation Recrystallized microstructure Fractal Neural network

Hepatoprotective and antioxidant activity of a mangrove plant Lumnitzera racemosa

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Asian Pacific Journal of Tropical Biomedicine 2011年第5期1卷 348-352页

作者： Sundaram Ravikumar Murugesan Gnanadesigan chool of Marine Sciences Department of Oceanography and Coastal Area Studies.Alagappa University

Objective:To identify the hepatoprotective and in vitro antioxidant activity of Lumnitzera racemosa(***) leaf ***:Animals in Group 1 served as vehicle control. Group 2 served as hepatotoxin(CCL_4 treated) *** 3 served as positive control(Silyntarin) group,and Group 4.S and ft served as(73,150 and 300 nig/kg bw p.o.)*** leaf extract treated ***,in vitro antioxidant DPPH,hydroxyl radical scavenging activity(HRSA),NO,ferric reducing antioxidant power(FRAP),lipid hydroperoxide(LPO) and super oxide dismutase(SOD) were also analyzed for the leaf ***:The levels of the serum parameters such as serum glutamic oxaloacetic transaminase(SGOT).serum glutamic pyruvic transaminase(SGPT).alkaline phosphatase(ALP),bilirubin,cholesterol(CHL).sugar and lactate dehydrogenase(LDH) were significantly increased in COL_4 treated rats when compared with the control group(P<0.05).But the *** leaf extract treated rats showed maximum reduction of SGOT[(210.16±19.63)IU/L].SGPT[(82.37±13.87) IU/L].ALP[(197.63±23.4.3)IU/L],bilurubilt[(2.13 ±0.84) mg/dL].cholesterol[(163.83± 13.63) mg/dL].sugar[(93.00±7.63) mg/dL]and LDH[(1134.00) ±285.00)IU/L]were observed with the high dose(300 mg/kg bw) of leaf extract treated rats. Histopathological scores showed that,no visible changes were observed with high dose(300 mg/ kgbw) of leaf extract treated rats except few mild *** IC_(50) values were observed as(56.37 ±4.87)μg/mL,(57.68±1.98) μg/mL,(64.15±2.90)μg/mL,(61.94±3.98)μg/mL,(94.53± 1.68) μg/mL and(69.7±2.65)μg/mL for DPPH,HRSA,NO,FRAP,LPO and SOL) radical scavenging activities, ***:In conclusion,the hepatoprotective effect of the *** leaf extract might be due to the presence of phenolic groups,terpenoids and alkaloids and in vitro antioxidant properties.

关键词： Antioxidant CCL_4 Histopathology Mangroves Hepatoprotective activity Lumnitzera racemosa Histopathological Phenolic Alkaloid Antioxidant property Hepatoprotective Radical scavenging activity Phenolic Alkaloid

Femtosecond control of photoionization and photodissociation of sodium iodine molecules by laser pulse

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Chinese Optics Letters 2012年第11期10卷 1-4页

作者：马晓光杨传路王美山龚玉兵刘文旺 chool of Physics and Optoelectronic Engineering Ludong University

Wave packet propagation techniques are used to find experimentally reliable laser parameters that yield optimal production. The photoionization and photodissoeiation dynamics of sodium iodine molecules are interpreted into several channels. Several frequencies are found to be suitable for Nal molecules during the photoionization and dissociation processes. Photon-dressed excited states and electron-dressed ionic continuum states facilitate the search for available laser parameters.

关键词： Lasers Photodissociation Sodium

Sign-changing Solutions to Nonlinear Elliptic Equations with Hardy Potential and Critical Parameter in R^2

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Acta Mathematicae Applicatae Sinica 2019年第3期35卷 689-694页

作者： Chao-dong XIE Zhi-hui CHEN School of Economics&Management Guizhou University for Ethinic MinoritiesGuizhou 550025China chool of Mathematics South China University of TechnologyGuangzhou 510640China

In this paper,a new Hilbert space is defined which is embedded into W01,q(Ω)for 1≤q<*** using sign-changing critical point theory,we prove the existence of infinitely many sign-changing solutions in this new space f... 详细信息

关键词： elliptic PDE sign-changing solution critical point