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Chinese Physics B 2022年第4期31卷 287-292页

作者： cai-ping zhang Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityTaiyuan 030031China

The high-order harmonic generation from an asymmetric molecular ion is theoretically investigated based on the Born-Oppenheimer model with two-dimensional electron *** is shown that the harmonic intensity changes periodically in elliptically polarized laser *** periodical character is *** establishing the physical image,the periodicity of the harmonic intensity can be ascribed to the contributions of the ground state and the excited ***,the electron dynamics from different electronic states can be selected via combining the elliptically polarized laser field with a static electric *** harmonics dominated either by ground state or excited state are emitted once in an optical cycle in the combined laser field.

关键词： asymmetric molecular ion high-order harmonic generation electron dynamics elliptically polarized laser field

Tribological behavior of magnetron sputtering CrMoN/MoS_2 composite coatings

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Acta Metallurgica Sinica(English Letters) 2012年第6期25卷 461-468页

作者： Yuelan DI Zhihai cai ping zhang Zhen YANG Qi LI Wei SHEN Department of Equipment Remanufacturing Engineering Academy of Armored Forces Engineering Beijing100072 China

CrMoN composite coatings were deposited on the surface of the stainless steel by magnetron sputtering, then were treated by low temperature ion sulfuration. FESEM equipped with EDX was adopted to analyze the morphologies and compositions of the surface, cross-section and worn scar of the sulfuration layer. The valence states of the film surface were detected by XPS. The nano-hardness and nano-modulus of the layer were measured by a nano tester. The results of the friction and wear show that the CrMoN/MoS2 composite coating is a kind of ideal solid lubrication layer and possess an excellent antifriction and wear-resistance.

关键词： CrMoN/MoS2 Magnetron sputtering Low temperature ionsulfurizing Solid lubrication

Dynamics and Thermodynamics of Porous HMX-like Material Under Shock

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Communications in Theoretical Physics 2009年第11期52卷 901-908页

作者： XU Ai-Guo zhang Guang-cai zhang ping PAN Xiao-Fei ZHU Jian-Shi National Key Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics P.O.Box 8009-26 Beijing 100088 China

Strong shock may induce complex processes in porous materials. We use the newly developed materialpoint-method to simulate such processes in an HMX-like material. To pick out relevant information, morphological characterization is used to treat with the temperature map. Via the Minkowski funetional analysis the dynamics and thermodynamics of the shock wave reaction on porous HMX-like material are studied. The geometrical and topological properties of the ＂hot-spots＂ are revealed. Numerical results indicate that, shocks in porous materials are not simple jump states as classically viewed, but rather are a complex sequence of compressions and rarefactions. They cover a broad spectrum of states. We can use coarse-grained description to the wave series. A threshold value of temperature presents a Turing pattern dynamical procedure. A higher porosity is generally preferred when the energetic material needs a higher temperature for initiation. The technique of data analysis can be used to other physical quantities, for example, density, particle velocity, some specific stress, etc. From a series of studies along the line, one may get a large quantity of information for desiring the fabrication of material and choosing shock strength according to what needed is scattered or connected ＂hot-spots＂. PACS numbers： ***, 05 Key words： porous material 70.-a, 05.40.-a, *** shock wave, Minkowski functionals

关键词： porous material shock wave Minkowski functionals

Controlling paths of high-order harmonic generation by orthogonal two-color fields

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Chinese Physics B 2020年第4期29卷 242-245页

作者： Ze-Hui Ma cai-ping zhang Jun-Lin Ma Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityLinfen 041004China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityLinfen 041004China

Controlling paths of high-order harmonic generation from H^2+ is theoretically investigated by numerically solving the time-dependent Schrodinger equation based on the Born-Oppenheimer approximation in orthogonal two-color *** simulations show that the change of harmonic emission paths is dependent on time-dependent distribution of *** with one-dimensional linearly polarized long wavelength laser,multiple returns are suppressed and short paths are dominant in the process of harmonic emission by two-dimensional orthogonal ω/2ω laser ***,not only are multiple returns weaken,but also the harmonic emission varies from twice to once in an optical cycle by orthogonalω/1.5ωlaser *** the time-frequency distributions and the time-dependent electron wave packets probability density,the mechanism of controlling paths is further *** a result,a 68-as isolated attosecond pulse is obtained by superposing a proper range of the harmonics.

关键词： high-order harmonic generation orthogonal two-color fields attosecond pulse generation

Modifying the Electron Dynamics in High-Order Harmonic Generation via a Two-Color Laser Field

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Chinese Physics Letters 2023年第12期40卷 40-45页

作者：张彩萍苗向阳 College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityTaiyuan 030031China

We investigate the harmonic emission from bichromatic periodic potential by numerically solving the timedependent Schro¨dinger equation in the velocity gauge. The results show that the harmonic minimum is sensitive to the wavelength. Moreover, distinct crystal momentum states contribute differently to harmonic generation. In momentum space, the electron dynamics reveal a close relationship between the spectral minimum and the electron distribution in higher conduction bands. Additionally, by introducing an ultraviolet pulse to the fundamental laser field, the suppression of the harmonic minimum occurs as a result of heightened electron populations in higher conduction bands. This work sheds light on the harmonic emission originating from a solid with a two-atom basis.

关键词： harmonic momentum bands

Effect of Carrier Envelope Phase on High-Order Harmonic Generation from Solid

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Chinese Physics Letters 2019年第5期36卷 35-39页

作者： Jie Shao cai-ping zhang Jing-Chao Jia Jun-Lin Ma Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityLinfen 041004 Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityLinfen 041004

The dependence of harmonic emission from a solid on the carrier envelope phase (CEP) is discussed by numerically solving the time-dependent Schr?dinger equation. The harmonic spectra periodically exhibit three distinct oscillating structures, which indicate the different dependences of the cutoff energies on the CEP. Furthermore,with time-dependent population imaging and the populations of different energy bands, the underlying physical mechanism is explored.

关键词： CEP Effect of Carrier Envelope Phase on High-Order Harmonic Generation from Solid CB

Effects of Temperature and Water Saturation on CO_2 Production and Nitrogen Mineralization in Alpine Wetland Soils

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Pedosphere 2009年第1期19卷 71-77页

作者： GAO Jun-Qin OUYANG Hua XU Xing-Liang ZHOU cai-ping zhang Feng Beijing Forestry University Beijing 100083 （China） Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 （China） Graduate University of the Chinese Academy of Sciences Beijing 100049 （China）

Relationships between carbon (C) production and nitrogen (N) mineralization were investigated in two alpine wetland soils of the Tibetan Plateau using laboratory incubation under different temperatures (5, 15, 25, and 35 ℃) and water saturation (noninundation and inundation). A significant positive relationship was found between CO2 production and N mineralization under increasing temperatures from 5 to 35 ℃ with the same water saturation condition in the marsh soil (r2 > 0.49, P 0.38, P 0.70, P 0.61, P < 0.013). In conclusion, temperatures and water saturation could regulate the relationship between CO2 production and net N mineralization in the Tibetan alpine marsh and peat soils.

关键词： CO2 production N mineralization temperature water saturation wetland

Theoretical investigation of the multiple rescatterings in harmonic emission process

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Theoretical investigation of the multiple rescatterings in h...

Theoretical investigation of the isolated attosecond pulse generation by restraining the spatial distribution of high-order harmonic emission

第七届全国计算原子与分子物理学术会议

作者： cai-ping zhang Chang-Long Xia Hui-Fang Cui Xiao-Hu Xu Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal University

＜正＞The high-order harmonic generation is a hot topic in intense laser field with the potential application tracing the ultrafast electron motion [1] and detecting the molecular structure[2]. Moreover, the related physical process has been explained by semiclassical three-step model [3] focusing on the first rescattering in HHG process.

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来源： cnki会议评论

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Theoretical investigation of the isolated attosecond pulse g...

Dynamics of CD4~+CD25~+ T Cells in Spleens and Mesenteric Lymph Nodes of Mice Infected with Schistosoma japonicum

第七届全国计算原子与分子物理学术会议

作者： Qian-Qian Li Hui-Fang Cui cai-ping zhang Chang-Long Xia Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal University

＜正＞Isolated attosecond pulse （IAP） generation is theoretically investigated by using a few-cycle laser pulse from a two-dimensional model of hydrogen molecular *** harmonic spectra from two nuclei of hydrogen molecular ion lead to *** investigate the spatial distribution in harmonic generation and propose a scheme

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来源： cnki会议评论

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Acta Biochimica et Biophysica Sinica 2006年第5期38卷 299-304页

作者： Xiao-ping cai Hui zhang Yong-Chen zhang Yong WANG Chuan SU Min-Jun JI Hai-Wei WU Xiang ZHU Zhao-Song zhang Guan-Ling WU Department of Pathogenic Biology,Jiangsu Province Key Laboratoly of Modern Pathogenic Biology,Nanjing Medical University,Nanjing 210029,China DepartmentofPathogenicBiology JiangsuProvinceKeyLaboratoryofModernPathogenicBiologyNanjingMedicalUniversityNanjing210029China

CD4~+CD25~+T cells play a major role in modulating immune response,but few reports havebeen published about ***,we investigated the changes in CD4~+CD25~+T cell populations inspleens and mesenteric lymph nodes of mice infected with Schistosoma *** proportions ofCD4~+CD25~+T cells in total CD4~+T cells were analyzed by flow ***25 and Foxp3 expression wasmeasured by real-time quantitative polymerase chain *** suppressive activities of CD4~+CD25~+Tcells were detected by in vitro proliferation of *** showed that the percentage of CD4~+CD25~+T cells was the same as controls 3 weeks *** the acute stage of infection,the percentagedecreased ***,at the chronic stage of infection,it rebounded to normal levels or *** expression of the CD25 and Foxp3 showed gradual increase along with the infection *** experiment also showed the strong suppressive effect of CD4~+CD25~+T cells,isolated during the chronicstage,on proliferation of the CD25~-*** is the first time that the dynamics of CD4~+CD25~+T cellpopulations was demonstrated in mice infected with *** conclusion,our data indicated thatCD4~+CD25~+cells might be involved in the immune modulation during *** infection,which en-hances current knowledge of the mechanisms of the immuno-downregulation and re-infection inschistosomiasis.

关键词： Schistosoma japonicum CD4~+CD25~+ T cell chronic infection Foxp3