竞技能力结构的“双子模型”理论在排球训练中的应用

本文主要以竞技能力结构的“双子模型”理论在排球训练中的应用为重点进行阐述,结合当下排球训练活动进展现状为依据,首先分析竞技能力结构的“双子模型”理论应用在排球训练中的产生背景,其次从几个方面深入说明并探讨竞技能力结构的“双子模型”理论在排球训练中的应用策略,最后阐述竞技能力结构的"双子模型"理论背景下,强化排球训练有效性的思考,旨意在为相关研究提供参考资料。

竞技能力结构的“双子”模型理论在篮球训练中的应用

篮球是一项多层次、多维度的竞技运动,其成功的关键在于综合竞技能力的发展。体能、技能、心理、战术和运动智能等方面的要素相互交织,共同塑造了篮球运动员的竞技能力。竞技能力结构的“双子”模型理论,提供了一种有机整合这些要素的方法。这一理论模型通过强调这些要素之间的相互关系,为篮球训练提供了一种全面性和系统性的方法。通过在训练中综合考虑和培养这些要素,可以更好地提高篮球运动员的整体竞技能力,使他们在比赛中取得更出色的表现。基于此,对竞技能力结构的“双子”模型理论在篮球训练中的应用展开研究。

“双子模型”理论在排球竞赛中的运用——2003年世界杯中国女排换人、暂停策略研究

运用运动员竞技能力结构的"双子模型"理论,分析中国女排教练员在第九届世界杯比赛中的换人和暂停策略,研究中国女排最佳阵容的合理运行,旨在进一步提高中国女排在竞技场上的竞技能力。

运动员竞技能力结构动态变化模型研究

从竞技能力的本质出发,提出运动竞技能力结构的动态变化模型——"金字塔模型";运动员的体能、技能与战术能力组成基础结构平台,只有在相同基础结构平台上的竞争才能体现竞技本质,才有可能创造优秀成绩;由运动员的心理能力与运动智能构成金字塔的塔尖,是运动员创造成绩获取胜利的决定性因素。基础平台与塔尖在比赛中的关系是相互促进、相互制约的。

品牌运营企业人才招聘的有效性研究——以FY公司为例

随着我国越来越多的品牌运营企业的发展,对于人才的需求也越发强烈。品牌运营企业通过各种招聘渠道和手段以期得到最有用、最合适的人才,因此,招聘有效性始终是其人力资源招聘管理工作的重要命题。本文以FY公司为例,构建了包括招聘规划定位、招聘时间设定、招聘渠道选择、招聘成本预算和招聘面试组织的过程有效性和包括能力、素质、岗位胜任、关系融洽性的结果有效性两大维度的"双子塔"评价模型,设计了招聘有效性的三级评价体系,并给出了改进招聘有效性的路径。

Measurement Induced Enhancement of Squeezing in Nondegenerate Two-Photon Jaynes-Cummings Model

Squeezing properties in the nondegenerate two-photon Jaynes-Cummings model are investigated. The effects of direct selective atomic measurement and the application of the classical field followed by atomic measurement are analyzed. Different values of the parameters of the classical field are taken into account. It is found that the field squeezing can be enhanced by measurement.

Interferences in Photodetachment of a Negative Molecular Ion

The photodetachment of a negative molecular ion is studied theoretically using a two-center model. The detached electron wave function is obtained as a superposition of two coherent waves originating from each center. The photo-detached electron flux is evaluated on a screen placed at a large distance from the negative molecular ion. The electron flux on the screen displays strong interferences, the peak positions are related to the distance between the two centers in the negative molecular ion. We a/so obtained a simple analytical formula for the total photodetachment cross section. It approaches one and two times of the cross section for the one-center system in the high and lowphoton energy limits respectively.

Coherence Loss of Two-Photon Jaynes-Cummings Model in Dispersive Approximation

Completely solving the dissipative dynamics of nonlinear Jaynes-Cumming model is a very difficult task.In our recent work (Phys. Lett. A284 (2001) 156), we just obtained analytical results of the field dissipative dynamicsof the nonlinear JCM. In the present paper, employing the perturbative expansion of master equation, we obtain thedensity operator of the system (field +atom). The coherence losses of the system and of the atom are investigated whentwo-photon process is involved. We also study the effect of different atomic initial states and the influence of the fieldamplitude on the atomic coherence loss.

Compact Modeling for Inversion Charge in Nanoscale DG-MOSFETs

A compact model for the integrated inversion charge density Qi in double-gate （DG-） MOSFETs is developed. For nanoscale applications,quantum confinement of the inversion carriers must be taken into account. Based on the previous work of Ge, we establish an expression for the surface potential with respect to Qi, and form an implicit equation, from which Qi can be solved. Results predicted by our model are compared to published data as well as results from Schred,a popular 1D numerical solver that solves the Poisson＇s and Schr6dinger equa- tions self-consistently. Good agreement is obtained for a wide range of silicon layer thickness,confirming the supe- riority of this model over previous work in this field.

Exploring High Strangeness Dibaryons with the Extended Quark Delocalization andColor Screening Model

Promising high strangeness dibaryons are studied by the extended quark delocalization and color screeningmodel. It is shown that besides H particle and di-Ω, there might be other dibaryon candidates worth to be searchedexperimentally such as NΩ.

New Physics Effects on Rare Decays B_u^+→π^+■^+■^-, ρ^+■^+■-in a Top Quark Two-Higgs-Doublet Model

Using the form factors from light-cone sum rules, we study the branching ratios and forward-backward asymmetries （FBAs） of the exclusive decays Bu^＋→π^＋e^＋e^- and Bu^＋ →ρ^＋e^＋e^- （e= e,μ） in the standard model （SM） and the top quark two-Higgs-doublet model （T2HDM）. From the numerical results, we find that the new physics contributions cannot provide very large enhancement to the branching ratios and the theoretical predictions are in good agreement with the SM ones. The T2HDM effects on FBAs of these decays are small. Precision measurements of the dilepton invariant mass distributions, especially in the lower dilepton mass region, and the FBAs in the decays Bu^＋ → π^＋ （ρ^＋ ）e^＋ e^- will greatly help in discriminating among the SM and the new physics models.

Ba（d）^o-Ba（d）^o Mixing and New Physics Effects in a Top Quark Two-Higgs Doublet Model

We calculate the new physics contributions to the neutral Bd^o and Ba^o meson mass splitting △Md and △Ma induced by the box diagrams involving the charged-Higgs bosons in the top quark two-Higgs doublet model （T2HDM）. Using the precision data, we obtain the bounds on the parameter space of the T2HDM： （a） For fixed MH = 400 GeV and 5= [0°, 60°], the upper bound on tan β is tan β≤ 30 after the inclusion of major theoretical uncertainties; （b） For the case of tan β≤ 20, a light charged Higgs boson with a mass around 300 GeV is allowed; and （c） The bounds on tan β and MH are strongly correlated： a smaller （larger） tan β means a lighter （heavier） charged Higgs boson.

Quantum Entanglement and Nonlocality Properties of Two-Mode Squeezed Thermal States in a Common-Reservoir Model

We study a system consisting of two identical non-interacting single-mode cavity fields coupled to a common vacuum environment and provide general, explicit, and exact solutions to its master equation by means of the characteristic function method. We analyze the entanglement dynamics of two-mode squeezed thermal state in this model and show that its entanglement dynamics is strongly determined by the two-mode squeezing parameter and the purity. In particular, we find that two-mode squeezed thermal state with the squeezing parameter r ≤ -（1/2） In √u is extremely fragile and almost does not survive in a common vacuum environment. We investigate the time evolution of nonlocality for two-mode squeezed thermal state in such an environment. It is found that the evolved state loses its nonlocality in the beginning of the evolution, but after a time, the revival of nonlocality can occur.

Two-Photon Exchange Corrections to Single Spin Asymmetry of Neutron and 3He

In a simple hadronie model, the two-photon exchange contributions to the single spin asymmetries for the nucleon and the 3He are estimated. The results show that the elastic contributions of two-photon exchange to the single spin asymmetries for the nucleon are rather small while those for the 3He are relatively large. Besides the strong angular dependence, the two-photon contributions to the single transfer. spin asymmetry for the 3He are very sensitive to the momentum

Nonclassical Effects of a Four-Level Excited-Doublet Atom Model

We adopt a dynamical algebraic method to study a four-level excited-doublet atom model and obtain the explicit expressions of the time-evolution operator and the density operator for the system. The nonclassical effects of the system, such as collapses and revivals of the atomic inversion and squeezing of the radiation field, are also discussed.

Macroscopic Quantum Coherence in Antiferromagnetic Molecular Magnets

The macroscopic quantum coherence in a biaxial antiferromagnetic molecular magnet in the presence of magnetic field acting parallel to its hard anisotropy axis is studied within the two-sublattice model. On the basis of instanton technique in the spin-coherent-state path-integral representation, both the rigorous Wentzel-Kramers-Brillouin exponent and pre-exponential factor for the ground-state tunnel splitting are obtained. We find that the quantum fluctuations around the classical paths can not only induce a new quantum phase previously reported by Chiolero and Loss (Phys. Rev. Lett. 80 (1998) 169), but also have great influence on the intensity of the ground-state tunnel splitting. Those features clearly have no analogue in the ferromagnetic molecular magnets. We suggest that they may be the universal behaviors in all antiferromagnetic molecular magnets. The analytical results are complemented by exact diagonalization calculation.

Tensor Interaction Effect in Dibaryon

The gluon and Goldstone boson induced tensor interaction effect on thedibaryon mass and the D-wave decay width has been studied in the quark delocalization, colorscreening model. The effective S-D wave transition interactions induced by gluon and Goldstone bosonexchanges decrease quickly as the increasing of the channel strangeness. The K and η meson tensorcontribution is negligible in this model. No six-quark state in the light Savor world can become abound one by the help of these tensor interactions except the deuteron. The partial D-wave decaywidth of I J~p = (1/2) 2~+ NΩ state to spin 0, 1 ΛΞ final state is 20.7 keV and 63.1 keVrespectively. It is a very narrow dibaryon resonance and might be detected in the relativistic heavyion reaction by the existing RHIC detectors through the reconstruction of the ΛΞ vertex mass andthe future COMPAS detector at CERN and FAIR project in Germany.

Bipartite and Tripartite Entanglement in a Three-Qubit Heisenberg Model

The bipartite and tripartite entanglement in a three-qubit Heisenberg XY model with a nonuniform magnetic field is studied. There are two or four peaks in the concurrence of the bipartite entanglement when the amplitudes of the magnetic fields are. differently distributed between the three qubits. It is very interesting to note that there is no tangle of tripartite entanglement between the three qubits when the amplitudes of the magnetic fieMs are varied. However, the variation of the magnetic field direction can induce the tangle. The tangle is periodic about the angle between the magnetic field and the z axis of the spin.

The Limit of Rotational Energy Transfer in Atom-Diatom Collision and the Hard Ellipsoid Potential Model

The limit of rotational energy transfer in atom-diatomic systems due to inelastic collision was investigated over the wide range of collision energy, reduced mass and potential parameters of F2-He system. The IICS （integral inelastic cross-sections） is obtained by the IOSAM （infinite order sudden approximation method） and predicted by PG （power-gap） law in the variation of cross-sections. The investigation provided that the classical limit of angular momentum transfer is given by hard ellipsoid potential is meaningful even the cross-sections computed on the real potential, provided the classical turning point on the surface of soft potential is assumed as hard potential surface.

Liquid-solid Coupling Characteristics in the Fluidized Bed Evaporator for Tobacco Refined Liquid

Consider a two-phase liquid-solid coupling effect, using Euler - Euler two-fluid model is solved using standard viscous term with k- e model and the velocity pressure coupling a simple algorithm to simulate liquid-solid two-phase flow characteristics of the fluid flow method bed, the applicability of the model to assess the drag. Different effects of a two-stage flow characteristics of fluidized bed flow characteristics, fluid and operating conditions affect the physical properties of the paper. We found from the simulation is the use of different drag coefficient models will greatly affect the results, which drag force model Syamlal - O＇ Brien is more suited to study the coupling characteristics of liquid flow in a fluidized bed of solid than Gidaspow. And velocity of the inert particles increase with the viscosity of the liquid increase. Further, the maximum speed of the inert particles in a fluidized bed by a central, which means the settling velocity in the fluidized bed of inert particles is the slowest; increasing liquid density and lead to increased speed of the inert particles; volume of the inert particles Score changes can also affect the speed of the particle velocity distribution, and there is no linear relationship.