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Non-equilibrium Thermodynamic Analysis of The Transport Properties of Formed-in-Place Zirconium (Ⅳ) Hydrous Oxide-Polyacylate Membranes in aqueous NaNO_3 solution
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作者 Jia Zhen YANG (Department of Chemistry, Liaoning University, Shenyang 110036) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第9期867-868,共2页
Nanofiltration of aqueous NaNO3 solution with a dynamically formed Zr(IV) hydrousoxide-PAA membrane is presented. The practical transpoft coefficients Lp, σ, ω were obtainedusing relationships of the non-equilibrium... Nanofiltration of aqueous NaNO3 solution with a dynamically formed Zr(IV) hydrousoxide-PAA membrane is presented. The practical transpoft coefficients Lp, σ, ω were obtainedusing relationships of the non-equilibrium thermodynamics and were used to calculate thefrictional coefficients of a friction model. 展开更多
关键词 non-equilibrium thermodynamics dynamically formed membrane electrolytenanofiltration
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Dynamics of Quantum State and Effective Hamiltonian with Vector Differential Form of Motion Method
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作者 Long Xiong Wei-Feng Zhuang Ming Gong 《Chinese Physics Letters》 SCIE EI CAS CSCD 2022年第7期36-40,共5页
Effective Hamiltonians in periodically driven systems have received widespread attention for realization of novel quantum phases, non-equilibrium phase transition, and Majorana mode. Recently, the study of effective H... Effective Hamiltonians in periodically driven systems have received widespread attention for realization of novel quantum phases, non-equilibrium phase transition, and Majorana mode. Recently, the study of effective Hamiltonian using various methods has gained great interest. We consider a vector differential equation of motion to derive the effective Hamiltonian for any periodically driven two-level system, and the dynamics of the spin vector are an evolution under the Bloch sphere. Here, we investigate the properties of this equation and show that a sudden change of the effective Hamiltonian is expected. Furthermore, we present several exact relations, whose expressions are independent of the different starting points. Moreover, we deduce the effective Hamiltonian from the high-frequency limit, which approximately equals the results in previous studies. Our results show that the vector differential equation of motion is not affected by a convergence problem, and thus, can be used to numerically investigate the effective models in any periodic modulating system. Finally, we anticipate that the proposed method can be applied to experimental platforms that require time-periodic modulation, such as ultracold atoms and optical lattices. 展开更多
关键词 dynamics of Quantum State and Effective Hamiltonian with Vector Differential Form of Motion Method HAMILTONIAN VECTOR QUANTUM
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Thomson scattering off a pair (electron-positron) plasma
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作者 郑坚 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第5期1028-1034,共7页
Thomson scattering off a pair (electron-positron) plasma is theoretically investigated in the collisionless and collisional limits respectively. Our calculations show that the power spectrum of the Thomson scatterin... Thomson scattering off a pair (electron-positron) plasma is theoretically investigated in the collisionless and collisional limits respectively. Our calculations show that the power spectrum of the Thomson scattering off a collisionless pair plasma is just proportional to the velocity distribution function of the particles in the plasma. Collective modes in the plasma do not have any effects on the Thomson scattering spectrum because of the correlation between the negatively- and positively-charged particles. In the collisional limit, the power spectrum of the Thomson scattering presents three spikes: two peaks correspond to two contra-propagating sound waves and one peak corresponds to an entropy wave. 展开更多
关键词 pair plasma Thomson scattering dynamic form factor
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Effects of B addition on glass forming ability and thermal behavior of FePC-based bulk metallic glasses 被引量:2
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作者 Sheng-feng Guo Chen Su +4 位作者 Jia-xiang Cui Jing Li Guan-nan Li Meng Zhang Ning Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第4期442-447,共6页
The FePC-based bulk metallic glasses(BMGs)have been demonstrated to possess high plasticity and good soft magnetic properties.However,the relatively poor glass forming ability(GFA)and thermal stabilities limited t... The FePC-based bulk metallic glasses(BMGs)have been demonstrated to possess high plasticity and good soft magnetic properties.However,the relatively poor glass forming ability(GFA)and thermal stabilities limited their application in industries.The effects of microalloying with B in FePC-based BMGs on the GFA and thermal behaviors were systematically investigated.It was found that a small amount of B addition can dramatically enhance the GFA of FePC-based BMGs,which in turn leads to the critical maximum diameter up to 2 mm for full glass formation even using low cost raw materials.The underlying mechanism of the enhancement of GFA from the competing crystalline phase with amorphous phase,the average thermal expansion coefficient and dynamic viscosity were discussed in detail. 展开更多
关键词 Fe-based bulk metallic glass Glass forming ability Thermal behavior Thermal expansion coefficient dynamic viscosity B addition
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