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Dynamics and synchronization of a complex-valued star network

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Science China(Technological Sciences) 2021年第12期64卷 2729-2743页

作者： CHAI Lin LIU jian CHEN GuanRong zhao xiu School of Mathematical Sciences University of JinanJinan 250022China Department of Electrical Engineering City University of Hong KongHong KongChina

Complex networks have been extensively investigated in recent ***,the dynamics,especially chaos and bifurcation,of the complex-valued complex network are rarely *** this paper,a star network of coupled complex-valued van der Pol oscillators is proposed to reveal the mechanism of star *** the aid of bifurcation diagram,Lyapunov exponent spectrum and phase portrait in this study,chaos,hyper-chaos,and multi-existing chaotic attractors are observed from the star network,although there are only periodic states in a complex-valued van der Pol *** versus coupling strength and nonlinear coefficient shows that the bigger the network size,the larger the parameter range within the chaotic(hyper-chaotic)*** is revealed that the chaotic bifurcation path is highly robust against the size variation of the star network,and it always evolves to chaos directly from period-1 and quasi-periodic states,***,the coexistence of chaotic phase synchronization and complete synchronization among the peripherals is also found from the star network,which is a symmetrybreaking phenomenon.

关键词： star network chaotic phase synchronization complex-valued van der Pol oscillator symmetry-breaking

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Multi-Electron Effects in Attosecond Transient Absorption of CO Molecules

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Chinese Physics Letters 2018年第4期35卷 20-24页

作者： Bin Zhang jian zhao Zeng-xiu zhao Northwest Institute of Nuclear Technology Xi'an 710024 Department of Physics College of Science National University of Defense Technology Changsha 410073

Using the fully propagated time-dependent Hartree–Fock method, we identify that both the dynamic core polarization and multiorbital contributions are important in the attosecond transient absorption of CO *** dynamics of core electrons effectively modifies the behaviors of electrons in the highest occupied molecular orbital, resulting in the modulation of intensity and position of the absorption peaks. Depending on the alignment angles, different inner orbitals are identified to contribute, and even dominate the total absorption spectra. As a result, multi-electron fingerprints are encoded in the absorption spectra, which shed light on future applications of attosecond transient absorption in complex systems.

关键词： Multi-Electron Effects in Attosecond Transient Absorption of CO Molecules SAO As CO

Role of Bloch oscillation in high-order harmonic generation from periodic structure

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Chinese Physics B 2019年第11期28卷 60-66页

作者： Lu Liu Jing zhao jian-Min Yuan Zeng-xiu zhao Graduate School of China Academy of Engineering Physics Beijing 100193China Department of Physics College of Liberal Arts and ScienceNational University of Defense TechnologyChangsha 410073China

The high-order harmonic generation from a model solid structure driven by an intense laser pulse is investigated using the semiconductor Bloch equations(SBEs). The main features of harmonic spectrum from SBEs agree well with the result of the time-dependent Schro¨dinger equation(TDSE), and the cut-off energy can be precisely estimated by the recollision model. With increasing the field strength, the harmonic spectrum shows an extra plateau. Based on the temporal population of electron and the time–frequency analysis, the harmonics in the extra plateau are generated by the Bloch oscillation. Due to the ultrafast time response of the Bloch electron, the generated harmonics provide a potential source of shorter isolated attosecond pulse.

关键词： high-order harmonic generation attosecond pulse semiconductor Bloch equations time-dependent Schrodinger equation

Ab initio Study of Anharmonic Force Field and Spectroscopic Constants for Germanium Dichloride

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Chinese Journal of Chemical Physics 2016年第6期29卷 657-662,I0001页

作者： Wei-xiu Pang Yun-bin Sun jian-jun zhao Yi Lu KeyLaboratoryofMagnetismandMaEneticMaterialsatUniversitiesofInnerMongoliaAutonomousRegion DepartmentofPhysicsBaotouNormalUniversityBaotou014030China

Ab initio study of the equilibrium structure, spectroscopy constants, and anharmonic force field for several isotopomers of germanium dichloride （70GeCl2, 72GECl2, and 76GeCl2） have been carried out at the MP2 and CCSD（T） levels of theory using cc-pVTZ basis set. The cal- culated geometries, rotational constants, vibration-rotation interaction constants, harmonic frequencies, anharmonic constants, quartic and sextic centrifugal distortion constants, cubic and quartic force constants are compared with experimental data. For small mass differences of the Ge isotopes, the isotopic effects for germanium dichloride are much weaker. The agreements are satisfactory for these two methods, but the deviations of CCSD（T） results are slightly larger than that of MP2, because of CCSD（T）＇s inadequate treatment of electron correlation in hypervalent Cl atom.

关键词： Anharmonic force field Spectroscopic constants Germanium dichloride

Relationship of public preferences and behavior in residential outdoor spaces using analytic hierarchy process and principal component analysis—a case study of Hangzhou City, China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第8期7卷 1372-1385页

作者： SHI jian-ren zhao xiu-min GE jian HOKAO Kazunori WANG Zhu Department of Civil Engineering Saga University Saga 8408502 Japan College of Art Design Zhejiang Gongshang University Hangzhou 310012 China Department of Architecture Zhejiang University Hangzhou 310058 China

This study examined public attitudes concerning the value of outdoor spaces which people use daily. Two successive analyses were performed based on data from common residents and college students in the city of Hangzhou, China. First, citizens registered various items constituting desirable values of residential outdoor spaces through a preliminary questionnaire. The result proposed three general attributes (functional, aesthetic and ecological) and ten specific qualities of residential outdoor spaces. An analytic hierarchy process (AHP) was applied to an interview survey in order to clarify the weights among these attributes and qualities. Second, principal factors were extracted from the ten specific qualities with principal component analysis (PCA) for both the common case and the campus case. In addition, the variations of respondents’ groups were classified with cluster analysis (CA) using the results of the PCA. The results of the AHP application found that the public prefers the functional attribute, rather than the aesthetic attribute. The latter is always viewed as the core value of open spaces in the eyes of architects and designers. Fur-thermore, comparisons of ten specific qualities showed that the public prefers the open spaces that can be utilized conveniently and easily for group activities, because such spaces keep an active lifestyle of neighborhood communication, which is also seen to protect human-regarding residential environments. Moreover, different groups of respondents diverge largely in terms of gender, age, behavior and preference.

关键词： Public preference Open space Analytic hierarchy process (AHP) Principal component analysis (PCA) Cluster analysis (CA)

Hydrogen-induced delayed fracture of Cu-containing high-strength bolt steel

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Journal of Iron and Steel Research International 2023年第2期30卷 375-383页

作者： Xiao-li zhao Cheng-xiang Zhang Yong-jian Zhang Wei-jun Hui xiu-ming zhao Materials Science and Engineering Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing100044China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing211167JiangsuChina

The hydrogen-induced delayed fracture(HIDF)behavior of a 1300-MPa-grade high-strength bolt steel 42CrMoV containing 0.42 wt.%Cu was investigated by constant load tensile test in a pH 3.5 Walpole *** is shown that the addition of Cu is beneficial to enhance the HIDF resistance by~13%.The observation of the fracture surface revealed that the area fraction of brittle crack initiation zone decreased remarkably for the Cu-added *** the corrosion pit depth and the corrosion rate of the Cu-added steel in the Walpole solution are notably decreased,which is primarily because of the formation of a Cu-rich protective compact rust layer and slightly higher corrosion *** a result,the absorbed hydrogen content in that solution was also decreased by~21%.It is concluded that the improvement in the HIDF resistance of the tested steel is primarily due to the increase in corrosion resistance and resultant decrease in the absorbed diffusible hydrogen content in the acidic condition.

关键词： Hydrogen-induced delayed fracture Hydrogen embrittlement High-strength bolt steel Copper Corrosion

In situ generation of biodegradable poly(p-dioxanone)microparticles by polymerization in supercritical carbon dioxide

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Chinese Chemical Letters 2011年第12期22卷 1509-1512页

作者： Tian Qiang Wang xiu Li zhao jian Yuan Hao State Key Lab of Electronic Films and Integrated Devices School of Microelectronics and Solid State Electronics University of Electronic Science and Technology of China Chengdu 610054 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang 621900 China

Ring-opening suspension polymerization of p-dioxanone（PDO） in supercritical carbon dioxide（scCO_2） was investigated in the presence of poly（caprolactone）-perfluropolyether-poly（caprolactone）（PCL-PFPE-PCL）.The molecular weight,yield and particle morphology of poly（p-dioxanone）（PPDO） were *** stabilizer was effective to stabilize the ring-opening polymerization（ROP） of PDO in scCO_2,leading to the formation of resorbable microparticles in a＂one pot＂*** mean size of PPDO microparticles obtained from suspension polymerizations was sensitive to the rate of agitation and the stabilizer *** method to generate PPDO microparticles has overcome its unprocessable drawback with common organic solvents and provided new product form for biomedical applications.

关键词： Biodegradable Poly(p-dioxanone) Polymerization Stabilizer Microparticle

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灵芝多糖分离鉴定及抗肿瘤活性的研究

中国生化药物杂志 2003年第4期24卷 173-176页

作者：赵世华姚文兵庞秀炳赵剑高向东中国药科大学生物制药学院江苏南京210009

目的探讨灵芝多糖的分离纯化、理化性质及初步抗肿瘤活性。方法采用热水提取 ,乙醇分级沉淀 ,DEAE 32离子交换柱色谱等方法从灵芝子实体中分离得到灵芝多糖。用SephadexG 10 0凝胶柱色谱法测定其纯度和平均分子量。用薄层色谱及气相色... 详细信息

目的探讨灵芝多糖的分离纯化、理化性质及初步抗肿瘤活性。方法采用热水提取 ,乙醇分级沉淀 ,DEAE 32离子交换柱色谱等方法从灵芝子实体中分离得到灵芝多糖。用SephadexG 10 0凝胶柱色谱法测定其纯度和平均分子量。用薄层色谱及气相色谱法测定其单糖组成。溴化四唑蓝法测定其初步体外抗肿瘤活性。结果从灵芝子实体中分离得到 4种均一多糖 (GLPL1 ～GLPL4 ) ,其中GLPL1 和GLPL3为主要成分 ,其分子量为 4 10 0和 5 70 0。GLPL1 由葡萄糖组成 ;GLPL3由葡萄糖和半乳糖组成。GLPL1 和GLPL3对人鼻咽癌细胞增殖有显著的抑制作用 ,GLPL3还对人胃癌细胞、人结肠癌细胞增殖有一定的抑制作用。结论灵芝多糖GLPL1 。

关键词：灵芝多糖分离纯化抗肿瘤活性

Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： LI jian ZHOU Gao-Liang YAN Zheng-Xin LIU Wei WANG zhao-Qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators