作者：
Li, Jing-Chun;Gong, Xue-Yu*;Dong, Jia-Qi;Wang, Jun;Yin, Lan
期刊：
Chinese Physics B,2016年25(4):45201-1-45201-8 ISSN：1674-1056
通讯作者：
Gong, Xue-Yu
作者机构：
[Gong, Xue-Yu; Li, Jing-Chun] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Jun; Dong, Jia-Qi] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China.;[Yin, Lan] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Gong, Xue-Yu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
HL-2M;electron–cyclotron current drive;neoclassical tearing modes;sawtooth
摘要：
The capabilities of current drive, neoclassical tearing mode (NTM) stabilization, and sawtooth control are analyzed for the electron–cyclotron wave (ECW) system in a HL-2M tokamak. Better performance of the upper launcher is demonstrated in comparison with that of a dropped upper launcher, in terms of J_(EC)/J_(bs) for NTM stabilization and I_(ECCD)/(?_ρ(tor))~2 for sawtooth control. 1-MW ECW power is enough for the 3/2 NTM stabilization, and 1.8-MW ECW power is required to suppress 2/1 NTM in a single null divertor equilibrium with 1.2-MA toroidal current with the upper launcher. Optimization simulation of electron–cyclotron current drive (ECCD) is carried out for three mirrors in an equatorial port, indicating that the middle mirror has a good performance compared with the top and bottom mirrors. The results for balanced co-and counter-ECCD in an equatorial port are also presented.
摘要：
In this paper, based on the two-potential approach combining with the isospin dependent nuclear potential, we systematically compare the α preformation probabilities of odd-A nuclei between nuclear isomeric states and ground states. The results indicate that during the process of α particle preforming, the low lying nuclear isomeric states are similar to ground states. Meanwhile, in the framework of single nucleon energy level structure, we find that for nuclei with nucleon number below the magic numbers, the α preformation probabilities of high-spin states seem to be larger than low ones. For nuclei with nucleon number above the magic numbers, the α preformation probabilities of isomeric states are larger than those of ground states.
期刊：
Chinese Physics. C,2018年42(4):044102-1-044102-5 ISSN：1674-1137
通讯作者：
Wu, Xi-Jun
作者机构：
[Li, Xiao-Hua; Zhao, Jie-Cheng; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
a decay;~(296)Og;hindrance factor;two-potential approach
摘要：
The present work is a continuation of our previous paper [J.-G. Deng, et al., Chin. Phys. C, 41: 124109 (2017)]. In the present work, the a decay half-life of the unknown nucleus 2960g is predicted within the two-potential approach and the hindrance factors of all 20 even-even nuclei in the same region as ~(296)Og, i.e. proton number 82<Z<126 and neutron number 152<N<184, from ~(250)Cm to ~(294)Og, are extracted. The prediction is 1.09 ms within a factor of 5.12. In addition, based on the latest experimental data, a new set of parameters of a decay hindrance factors for the even-even nuclei in this region, considering the shell effect and proton-neutron interaction, are obtained.
摘要：
A novel data-driven method based on Gaussian mixture model (GMM) and distance evaluation technique (DET) is proposed to predict the remaining useful life (RUL) of rolling bearings. The data sets are clustered by GMM to divide all data sets into several health states adaptively and reasonably. The number of clusters is determined by the minimum description length principle. Thus, either the health state of the data sets or the number of the states is obtained automatically. Meanwhile, the abnormal data sets can be recognized during the clustering process and removed from the training data sets. After obtaining the health states, appropriate features are selected by DET for increasing the classification and prediction accuracy. In the prediction process, each vibration signal is decomposed into several components by empirical mode decomposition. Some common statistical parameters of the components are calculated first and then the features are clustered using GMM to divide the data sets into several health states and remove the abnormal data sets. Thereafter, appropriate statistical parameters of the generated components are selected using DET. Finally, least squares support vector machine is utilized to predict the RUL of rolling bearings. Experimental results indicate that the proposed method reliably predicts the RUL of rolling bearings.
作者：
Yin, Fu Qi;Zhou, Sheng Fan;Ouyang, Zi Gen;Xiao, Cui Hui*
期刊：
Acta Mathematica Sinica. English Series,2009年25(2):321-342 ISSN：1439-8516
通讯作者：
Xiao, Cui Hui
作者机构：
[Yin, Fu Qi; Xiao, Cui Hui] Xiangtan Univ, Sch Math & Computat Sci, Xiangtan 411105, Peoples R China.;[Zhou, Sheng Fan] Shanghai Normal Univ, Math & Sci Coll, Shanghai 200234, Peoples R China.;[Ouyang, Zi Gen] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Xiao, Cui Hui] Xiangtan Univ, Sch Math & Computat Sci, Xiangtan 411105, Peoples R China.
摘要：
We consider the asymptotic behavior of solutions of an infinite lattice dynamical system of dissipative Zakharov equation. By introducing new weight inner product and norm in the space and establishing uniform estimate on "Tail End" of solutions, we overcome some difficulties caused by the lack of Sobolev compact embedding under infinite lattice system, and prove the existence of the global attractor; then by using element decomposition and the covering property of a polyhedron in the finite-dimensional space, we obtain an upper bound for the Kolmogorov ∈-entropy of the global attractor; finally, we present the upper semicontinuity of the global attractor.
期刊：
Chinese Physics B,2012年21(7): 078102-1-078102-5 ISSN：1674-1056
通讯作者：
Peng, Zhi-Hua
作者机构：
[Ning, Yan-Tao; Peng, Zhi-Hua; Guo, Yan-Chun; Gong, Xue-Yu; Peng, Yan-Feng] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Peng, Zhi-Hua] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
carbon nanotubes;hydrogen plasma;static magnetic field;microwave absorption
摘要：
We theoretically investigate the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes under an external static magnetic field in the frequency range 0.3 GHz to 30 GHz, using the Maxwell equations in conjunction with a general expression for the effective complex permittivity of magnetized plasma known as the Appleton-Hartree formula. The effects of the external static magnetic field intensity and the incident microwave propagation direction on the microwave absorption of hydrogen plasma in CNTs are studied in detail. The numerical results indicate that the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes can be obviously improved when the exter- nal static magnetic field is applied to the material. It is found that the specified frequency microwave can be strongly absorbed by the hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes over a wide range of incidence angles by adjusting the external magnetic field intensity and the parameters of the hydrogen plasma.
作者机构：
[Xu Youjun] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Liu Zhenhai] Cent S Univ, Sch Math Sci & Comp Technol, Changsha 410075, Hunan, Peoples R China.
通讯机构：
[Xu Youjun] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
controllability;Kakutani fixed-point theorem;nonlinear gradient term
摘要：
In this article, we consider the controllability of a quasi-linear heat equation involving gradient terms with Dirichlet boundary conditions in a bounded domain of RN. The results are established by using the variational methods, the related duality theory and Kakutani Fixed-point Theorem.
作者：
Hu Ji-Wen;Qian Sheng-You*;Sun Jia-Na;Lu Yun-Bin;Hu Ping
期刊：
Chinese Physics B,2015年24(9): 094301-1-094301-6 ISSN：1674-1056
通讯作者：
Qian Sheng-You
作者机构：
[Hu Ji-Wen; Hu Ping; Sun Jia-Na; Lu Yun-Bin] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Hu Ji-Wen; Qian Sheng-You] Hunan Normal Univ, Sch Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Qian Sheng-You] Hunan Normal Univ, Sch Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China.
摘要：
A model of an ultrasound-driven encapsulated microbubble (EMB) oscillation near biomaterial wall is presented and used for describing the microflow-induced shear stress on the wall by means of a numerical method. The characteristic of the model lies in the explicit treatment of different types of wall for the EMB responses. The simulation results show that the radius-time change trends obtained by our model are consistent with the existing models and experimental results. In addition, the effect of the elastic wall on the acoustic EMB response is stronger than that of the rigid wall, and the shear stress on the elastic wall is larger than that of the rigid wall. The closer the EMB to the wall, the greater the shear stress on the wall. The substantial shear stress on the wall surface occurs inside a circular zone with a radius about two-thirds of the bubble radius. This paper may be of interest in the study of potential damage mechanisms to the microvessel for drug and gene delivery due to sonoporation.
关键词：
laminar flow<&wdkj&>asymmetric flow<&wdkj&>asymptotic solution<&wdkj&>porous and retractable channel<&wdkj&>magnetic field
摘要：
The self-similarity solutions of the Navier-Stokes equations are constructed for an incompressible laminar flow through a uniformly porous channel with retractable walls under a transverse magnetic field. The flow is driven by the expanding or contracting walls with different permeability. The velocities of the asymmetric flow at the upper and lower walls are different in not only the magnitude but also the direction. The asymptotic solutions are well constructed with the method of boundary layer correction in two cases with large Reynolds numbers, i.e., both walls of the channel are with suction, and one of the walls is with injection while the other one is with suction. For small Reynolds number cases, the double perturbation method is used to construct the asymptotic solution. All the asymptotic results are finally verified by numerical results.
作者机构：
[Liu, Weijun; Tan, Qionghua; Chen, Jing] Cent S Univ, Sch Math, Changsha 410075, Hunan, Peoples R China.;[Tan, Qionghua] Nanhua Univ, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Liu, Weijun] Cent S Univ, Sch Math, Changsha 410075, Hunan, Peoples R China.
关键词：
block-transitive;6-designs;3-homogeneous;automorphism groups
摘要：
In recent years, there has been a great deal of research concerning the flagtransitive t-designs, however, few about the block-transitive t-designs with t large (t ≥ 4). In 1993, Cameron and Praeger conjectured that there are no non-trivial block-transitive 6-designs. In this paper, we prove that the conjecture is true when k ≤ 10000 and G < Aut(D) is almost simple.
作者：
Ma Man-jun*;Hu Jia-jia;Zhang Jun-jie;Tao Ji-cheng
期刊：
Applied Mathematics. Series B, A Journal of Chinese Universities,2013年28(3):290-302 ISSN：1005-1031
通讯作者：
Ma Man-jun
作者机构：
[Ma Man-jun; Tao Ji-cheng; Hu Jia-jia] China Jiliang Univ, Coll Sci, Dept Math, Hangzhou 310018, Peoples R China.;[Zhang Jun-jie] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Ma Man-jun] China Jiliang Univ, Coll Sci, Dept Math, Hangzhou 310018, Peoples R China.
关键词：
general form of growth law<&wdkj&>nonlinearity-driven diffusion<&wdkj&>periodic solution<&wdkj&>global attractivity<&wdkj&>rate of convergence<&wdkj&>35K55<&wdkj&>35K57<&wdkj&>35K45<&wdkj&>35K50
