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The theory of early nonlinear stage of m=1 instability with locally flattened q-profile

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Matter and Radiation at Extremes 2018年第5期3卷 243-247页

作者： kai-qi Cao Xian-Qu Wang Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengduSichuan 610031China

In this paper,we analyze the modification of fast particles on the nonlinear radial displacement of m=1 internal kink mode with a shoulderlike equilibrium current *** the matching method on the solutions of the outer and inner regions,we derive the analytical form of nonlinear radial displacement in the limit of q'=q"=0,which is valid to the cases of weak shear due to a slight flattening of the q(r)profile around q=*** have taken into consideration the effects of the circulating and trapped fast particles on the nonlinear state of the *** is found that a fast particle can modify the nonlinear saturation level by the change of potential energy,depending on the fast particle *** the matching of linear dispersion relation to early nonlinear result,we also obtain the relations of radial displacement to the mode frequency and linear growth rate,and discuss the scaling for different stabilities of the MHD modes.

关键词： Tokamak Magnetohydrodynamics Weak magnetic shear Internal kink mode Fast particle

Application of Bipartite and Tripartite Entangled State Representations in Quantum Teleportation of Continuous Variables

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Communications in Theoretical Physics 2005年第2X期44卷 269-273页

作者： YUAN Hong-Chun qi kai-Guo Department of Physics University of Science and Technology of China Hefei 230026 China Department of Physics Huaibei Coal Industry Teachers' College Huaibei 235000 China

We mostly investigate two schemes. One is to teleport a multi-mode W-type entangled coherent state using a peculiar bipartite entangled state as the quantum channel different from other proposals. Based on our formalism,teleporting multi-mode coherent state or squeezed state is also possible. Another is that the tripartite entangled state is used as the quantum channel of controlled teleportation of an arbitrary and unknown continuous variable in the case of three participators.

关键词： entangled state representation continuous variable quantum teleportation

Organic materials with hydrostatic pressure induced mechanochromic properties

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Chinese Chemical Letters 2016年第8期27卷 1367-1375,1470页

作者： Lu Wang kai-qi Ye Hong-Yu Zhang State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University

Mechanochromic organic materials are a typical class of stimuli materials that has response to external physical stimuli such as shearing,grinding,and compressing *** compounds with mechanochromic characters in solid forms have attracted significant attention in the past decades due to their potential applications in sensors and memory *** anvil cell is an emerging technology that can provide isotropic pressure in a tiny *** a new stimuli method can be applied in investigating optical variation of mechanochromic *** this review,we focus on mechanoluminescence systems that are responsive to isotropic compression under high pressure and summarize the recent advances on organic materials studied by the diamond anvil cell.

关键词： Organic solids Mechanochromic Diamond anvil cell Stimuli response Hydrostatic pressure

Thermoacoustic imaging:From single-element scanning to portable and array-based imaging

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Journal of Electronic Science and Technology 2023年第3期21卷 1-20页

作者： Yi-Jie Huang qi-kai-Yu Feng Lin Huang School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China Zhangjiang Laboratory Shanghai201204China

The microwave-induced thermoacoustic imaging(TAI)technology has both the advantages of high contrast of microwave imaging and high resolution of ultrasound imaging(UI),so it has carried out exploratory application research in various areas,such as the early detection of breast tumors and cerebrovascular ***,the microwave generator used in the traditional TAI technology is huge and expensive,and the temporal resolution is also too low due to the single-element scanning ***,it is difficult to meet the needs of clinical *** this paper,the iterative process and the analysis of related application scenarios from single-element scanning to portable and array-based TAI,such as the miniaturized microwave generator,handheld antenna,multi-channel data acquisition,and UI/TAI􀀁dual-modality imaging,are reviewed,and the future trends of this technology are *** review helps researchers in the field of TAI learn the technological development process and future *** also deepens clinicians’understanding of TAI so as to put forward more application requirements.

关键词： Array-based Portable Single-element scanning Thermoacoustic imaging(TAI)

Ideal cotorsion pairs over one point extensions

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Applied Mathematics(A Journal of Chinese Universities) 2022年第2期37卷 213-227页

作者： ZHU Hai-yan DU Ben-jun WANG qi-kai College of Science Zhejiang University of TechnologyHangzhou 310023China

Let R[P] be the one point extension of a k-algebra R by a projective R-module *** prove that the extension of a complete ideal cotorsion pair in R-Mod is still a complete ideal cotorsion pair in R[P]-*** an application,it is obtainable that the operation(-)_(m)[P]satisfies the so-called distributive law relating the operations of products and extensions of ideals under appropriate conditions.

关键词： one point extension cotorsion pair ME-con ation

Continuous Multipartite Entangled Representation and Its Wigner Operator and Marginal Distribution

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Communications in Theoretical Physics 2005年第6X期44卷 1015-1020页

作者： YUAN Hong-Chun LI Heng-Mei qi kai-Guo Department of Physics University of Science and Technology of China Hefei 230026 China Department of Physics Huaibei Coal Industry Teachers' College Huaibei 235000 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

By extending the EPR bipartite entanglement to multipartite case, we briefly introduce a continuous multipartite entangled representation and its canonical conjugate state in the multi-mode Fock space, analyze their Schmidt decompositions and give their entangling operators. Furthermore, based on the above analysis we also find the n-mode Wigner operator. In doing so we may identify the physical meaning of the marginal distribution of the Wigner function.

关键词： continuous multipartite entangled representation Wigner operator marginal distribution

The Convergence Analysis on the Economic Growth and Energy Intensity Gap between Regional Sectors

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Chinese Journal of Population,Resources and Environment 2011年第3期9卷 33-46页

作者： qi Shaozhou Li kai Economics and Management School of Wuhan University Wuhan Hubei 430072 China

In this paper,the authors have analyzed the relationship between energy intensity gap and GDP per worker gap of China's western and eastern provinces over the period *** panel data model with lag adjustment,taking the above provinces and six industrial sectors (agriculture,forestry,animal husbandry,and fisheries,industry,construction industry,transport,storage and post & telecommunications,wholesale and retail trades & catering industry,and other sectors of tertiary industry.) as the investigated subjects,the authors have conducted empirical study on the convergence of GDP per worker gap and the convergence of energy intensity gap with respect to the variation of GDP per worker gap,and have concluded that:First,the GDP per worker gap of the six industrial sectors and provinces are convergent,and of this,the convergence rate of GDP per worker gap of Construction Industry is the fastest,while that of Industry is the ***,the overall energy intensity gap between eastern and western provinces is convergent,that is,with the narrowing of GDP per worker gap between eastern and western provinces,the energy intensity gap converges,but its convergence rate is slower than that of GDP per worker ***,energy intensity gap between various industrial sectors of the east and the west is either convergent or divergent,and there are *** energy intensity gap of agriculture,forestry,animal husbandry,and fisheries,industry,and construction industry is convergent,while that of the other three industrial sectors is ***,the convergence of the overall energy intensity of the western provinces is not in conformity with the convergence of the various industrial sectors,and there are significant differences,indicating that the western provinces and autonomous regions should take measures to more effectively improve their overall energy utilization efficiency at the industrial sector level.

关键词： convergence industrial sector energy intensity paneldata analysis

A facial strategy to efficiently improve catalytic performance of CoFe_(2)O_(4) to peroxymonosulfate

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Journal of Environmental Sciences 2022年第6期34卷 1-13页

作者： Lili Gao Jieqiong Deng Tong Li kai qi Jiandong Zhang Qun Yi College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China

Cobalt iron spinel(CoFe_(2)O_(4)) has been considered as a good heterogeneous catalysis to peroxymonosulfate(PMS) in the degradation of persistent organic pollutants due to its magnetic properties and good chemical stability. However, its catalytic activity needs to be further improved. Here, a facial strategy, “in-situ substitution”, was adopted to modify CoFe_(2)O_(4) to improve its catalytic performance just by suitably increasing the Co/Fe ratio in synthesis process. Compared with CoFe_(2)O_(4), the newly synthesized Co_(1.5)Fe_(1.5)O_(4), could not only significantly improve the degradation efficiency of phenol, from 50.69 to 93.6%, but also exhibited more effective mineralization ability and higher PMS utilization. The activation energy advantage for phenol degradation using Co_(1.5)Fe_(1.5)O_(4)was only 44.2 k J/mol, much lower than that with CoFe_(2)O_(4)(127.3 k J/mol). A series of related representations of CoFe_(2)O_(4) and Co_(1.5)Fe_(1.5)O_(4) were compared to explore the possible reasons for the outstanding catalytic activity of Co_(1.5)Fe_(1.5)O_(4). Results showed that Co_(1.5)Fe_(1.5)O_(4)as well represented spinel crystal as CoFe_(2)O_(4)and the excess cobalt just partially replaced the position of iron without changing the original structure. Co_(1.5)Fe_(1.5)O_(4) had smaller particle size(8.7 nm), larger specific surface area(126.3 m^(2)/g), which was more favorable for exposure of active sites. Apart from the superior physical properties, more importantly, more reactive centers Co(Ⅱ) and surface hydroxyl compounds generated on Co_(1.5)Fe_(1.5)O_(4), which might be the major reason. Furthermore, Co_(1.5)Fe_(1.5)O_(4) behaved good paramagnetism, wide range of pH suitability and strong resistance to salt interference, making it a new prospect in environmental application.

关键词： CoFe_(2)O_(4) Co_(1.5)Fe_(1.5)O_(4) In-situ substitution Peroxymonosulfate(PMS) Advanced oxidation processes(AOPs)

The stationary distribution and extinction of a double thresholds HTLV-I infection model with nonlinear CTL immune response disturbed by white noise

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International Journal of Biomathematics 2019年第5期12卷 221-240页

作者： kai qi Daqing Jiang Tasawar Hayat Ahmed Alsaedi College of Science China University of Petroleum (East China) Qingdao 266580P.R.China Key Laboratory of Unconventional Oil and Gas Development China University of Petroleum (East China) Ministry of Education Qingdao 266580P.R.China Nonlinear Analysis and Applied Mathematics (NAAM)-Research Group King Abdulaziz University JeddahSaudi Arabia Department of Mathematicsf Quaid-i-Azam University 45320 Islamabad 44000 Pakistan

This paper investigates the stochastic HTLV-I infection model with CTL immune response,and the corresponding deterministic model has two basic reproduction *** consider the nonlinear CTL immune response for the interaction between the virus and the CTL immune ***,for the theoretical needs of system dynamical behavior,we prove that the stochastic model solution is positive and *** atldition,we obtain the existence of ergodic stationary distribution by stochastic Lyapunov ***,sufficient condition for the extinction of the stochastic system is ***,the dynamical behavior of deterministic model is included in our result of stochastic model when the white noise disappears.

关键词： HTLV-I infection CTL immune response CD4+ T cells stationary distriution extinction