根据洛伦兹电子论、朗伯定律和比尔定律,提出了一种用来描述溶液的浓度与其折射率线性关系的理论模型.实验测定了蔗糖和N aC l溶液,基于最小二乘法原理,根据实验数据得到各自的浓度与其折射率关系的实验模型,实验结果表明模型的计算结...根据洛伦兹电子论、朗伯定律和比尔定律,提出了一种用来描述溶液的浓度与其折射率线性关系的理论模型.实验测定了蔗糖和N aC l溶液,基于最小二乘法原理,根据实验数据得到各自的浓度与其折射率关系的实验模型,实验结果表明模型的计算结果与实际测量结果的误差小于2%.这种研究结果对利用光激发表面等离子共振技术和介质增强古斯-汉欣位移方法测量溶液的浓度具有参考意义.展开更多
A structure relaxation model based on the empirical electron theory of solids and molecules is developed to compute the diffusion active energies of C, N in γFe. First, adding a restriction, the lattice maintains rig...A structure relaxation model based on the empirical electron theory of solids and molecules is developed to compute the diffusion active energies of C, N in γFe. First, adding a restriction, the lattice maintains rigidity when solute atom migrates to the saddle point. In this step, the hybridization classes of every atom do not change. Then, the restriction is loosed and the atoms are relaxed under the coulomb repulsive forces. It is supposed that the energy needed in the first step would be compensated partly by the second step. In this way, the diffusion active energies of C, N in γFe are computed. Compared with the experiment data, the relative errors are less than 5%, which are good results in the computation of activation energy of diffusion.展开更多
With the introduction of Poisson's ratio in the expression of Young's modulus,nearly all the theoretical values of the various elastic moduli for the alkaline earth metals and rare earth elements can be greatl...With the introduction of Poisson's ratio in the expression of Young's modulus,nearly all the theoretical values of the various elastic moduli for the alkaline earth metals and rare earth elements can be greatly refined, with the single exception of the theoreticalvalue of Young's modulus for Pr which is slightly increased This points to the validityof the new theory, that the bulk modulus is independent of the Poisson's ratio, and further that the valency electron structures of solids as determined by Yu's theory are correct.展开更多
Compton scattering is used very widely. In this article, we depict an overall picture for its applications which are based on two basic theories. The first is the electron densitometry theory related to electron densi...Compton scattering is used very widely. In this article, we depict an overall picture for its applications which are based on two basic theories. The first is the electron densitometry theory related to electron density. According to this theory its applications are in two fields: one is Compton scatter densitometry (CSD), the other is Compton scatter imaging (CSI). The second technique involves the electron momentum distribution and Compton profile. Applications of this technique are mainly the Compton profile analysis (CPA) and the Compton profile or the electron momentum distribution in physics and chemistry. Future research fields are suggested according to the current situation and limits of this technique and a promising prospect is unfolded.展开更多
The paper systematically describes the theoretical research on Cerenkov effect of REB in optical fibres. The analytical expressions for light generation ,collection efficiency ,electron incident angle .the Cerenkov ra...The paper systematically describes the theoretical research on Cerenkov effect of REB in optical fibres. The analytical expressions for light generation ,collection efficiency ,electron incident angle .the Cerenkov radiation sensitivity of the optical fibre to the current density of the REB stream.and the response of the sensitivity to both electron energy and electron incident angles are given. The typical sensor system for REB measurement is presented. The dynamic range and bandwidth are quantitatively analyzed. The calculation results are illustrated,展开更多
文摘根据洛伦兹电子论、朗伯定律和比尔定律,提出了一种用来描述溶液的浓度与其折射率线性关系的理论模型.实验测定了蔗糖和N aC l溶液,基于最小二乘法原理,根据实验数据得到各自的浓度与其折射率关系的实验模型,实验结果表明模型的计算结果与实际测量结果的误差小于2%.这种研究结果对利用光激发表面等离子共振技术和介质增强古斯-汉欣位移方法测量溶液的浓度具有参考意义.
文摘A structure relaxation model based on the empirical electron theory of solids and molecules is developed to compute the diffusion active energies of C, N in γFe. First, adding a restriction, the lattice maintains rigidity when solute atom migrates to the saddle point. In this step, the hybridization classes of every atom do not change. Then, the restriction is loosed and the atoms are relaxed under the coulomb repulsive forces. It is supposed that the energy needed in the first step would be compensated partly by the second step. In this way, the diffusion active energies of C, N in γFe are computed. Compared with the experiment data, the relative errors are less than 5%, which are good results in the computation of activation energy of diffusion.
文摘With the introduction of Poisson's ratio in the expression of Young's modulus,nearly all the theoretical values of the various elastic moduli for the alkaline earth metals and rare earth elements can be greatly refined, with the single exception of the theoreticalvalue of Young's modulus for Pr which is slightly increased This points to the validityof the new theory, that the bulk modulus is independent of the Poisson's ratio, and further that the valency electron structures of solids as determined by Yu's theory are correct.
基金Funded by the project of Chongqing Normal University (05XSY002).
文摘Compton scattering is used very widely. In this article, we depict an overall picture for its applications which are based on two basic theories. The first is the electron densitometry theory related to electron density. According to this theory its applications are in two fields: one is Compton scatter densitometry (CSD), the other is Compton scatter imaging (CSI). The second technique involves the electron momentum distribution and Compton profile. Applications of this technique are mainly the Compton profile analysis (CPA) and the Compton profile or the electron momentum distribution in physics and chemistry. Future research fields are suggested according to the current situation and limits of this technique and a promising prospect is unfolded.
文摘The paper systematically describes the theoretical research on Cerenkov effect of REB in optical fibres. The analytical expressions for light generation ,collection efficiency ,electron incident angle .the Cerenkov radiation sensitivity of the optical fibre to the current density of the REB stream.and the response of the sensitivity to both electron energy and electron incident angles are given. The typical sensor system for REB measurement is presented. The dynamic range and bandwidth are quantitatively analyzed. The calculation results are illustrated,
