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- Based on fractal dimension, an adaptive selection approach to Gibbs random field parameter for binary sketch of grey image is presented in this work. 本文研究采用分层吉布斯随机场模型实现图像二值化时吉布斯模型参数的选取方法 .;根据分形维数反映图像复杂程度的特性;定义了吉布斯模型参数与分形维数的关系;从而实现了吉布斯模型参数的自适应选取
- With the deformed relativistic mean field theory the properties of the superheavy nuclei (superscript 294)118 and (superscript 292)116 are studied. 摘要用形变的相对论平均场理论对超重核(上标294)118及(上标292)116的性质进行了研究。
- This problem describes BCS pairing. It is very convenient to construct the mean field theory using the functional integral representation. 此问题描述BCS配对。利用泛函积分表象来建立平均场理论是十分方便的。
- In this spirit, then we deduced the effective quark-quark interaction with confinement terms and the vacuum condensate at the mean field level in the framework of GCM. 本着这种精神,我们推出了具有囚禁特点的等效的夸克-夸克相互作用势,并在GCM的框架下计算了一些真空凝聚。
- The locally gauge invariant mean field approach is generalized from Abelian gauge groups to non-Abelian gauge groups. The SU(2) Yang-Mills-Higgs field coupling system is analyzed. 本文将定域规范不变的平均场方法由分立的阿贝尔群情况推广至非阿贝尔连续群情况;计算了SU(2)Yang-Mills场和Higgs场耦合系统的相图.
- It is proved that the tilted axis cranking (TAC) model is equivalence to the particle rotor model (PRM) under the semi-classical and mean field approximations. 阐述了剪刀带的形成机制,并论证了在半经典近似和平均场近似下,倾斜轴推转模型与粒子转子模型等价。讨论了原子核在有三轴形变时出现的一种全新的磁转动现象-手征双重带。
- The flow field parameter distribution can be affected more in upper stream, especially near the leading edge area while the mach number distribution of the upstream blade surface is affected little. 对上游进口段,特别是靠近叶片前缘区域流场参数分布有较大影响,但对于上游叶片表面马赫数影响不大。
- Critical phenomena in laser system, in which optical bistability can occur, are studied with concrete examples and described by the mean field theory in detail. 通过实际事例研究了可能出现光学双稳性的激光系统中的临界现象,并且用平均场理论作详细描述。
- In general, this modified RMF model is an phenomenological theory based on mean field hypnosis,and it generate some numerical value in accordance to experiment results. 改进后的 RMF 理论仍然是一个唯象的 平均场理论,一系列的计算结果都基本接近实验结果。
- By using renormalized mean field theory we study charge ordered d-wave resonating valence bond states (dRVB) in doped cuprates, and estimate their energies in the $t-J $ model. 长程库仑作用势使电荷趋向密度分布不均匀,而动能项则喜欢均匀分布的电荷,这两项 的竞争可能会导致稳定的电荷序图案出现。
- The characteristic of flow field on the hydrofoil surface under different flow field parameters was tested using PIV. 利用PIV流场测试仪测试不同流场参数下翼型表面流场的流动特性;
- The important methods of analysis TMS evoked brain responses include: waveform analysis, spectral analysis, global mean field amplitude (GMFA), minimum-norm estimation (MNE), and so on. TMS诱发电位分析目前使用的主要方法有:直接波形分析、频谱分析、全局平均场幅度(GMFA)方法、最小范数估计(MNE)等。
- The effects of geomagnatic field parameters in directional drilling,selection of non magnet... 探讨了地磁场参数在定向钻井中的作用、无磁钻铤长度的选择、测量数据的比较等问题。
- The DFT approach for LJ fluid is simple, quantitatively accurate in a wide range of coexistence phase and external field parameters. 所得的LJ流体的密度泛函近似计算简单,精确。
- Using mean field theory, the effects of depolarization field on the thermodynamic properties of ferroelectric superlattice is studied within the framework of the transverse Ising model. 摘要应用平均场理论,在横场伊辛模型的框架内,研究了退极化场对铁电超晶格热力学性质的影响。
- In this treatment, the effects of solvent and mean field of surrounding ions have been considered by virtue of an effective interionic pair potential and the three-body interaction is neglected. 其中离子间相互作用选用有效势能描述,并且忽略了稀溶液中粒子间的三体相互作用。
- Hansch C., Leo A. and Taft R. W., “A Survey of Hammett Substituent Constants and Resonance and Field Parameters,” Chem. Rev., 91, pp. 165-195, December 1991. 洪永叁,周宥佑,“超强炸药:高环张力的多硝基笼状化合物”,化学,第五十八卷,第二期,第40-42页,2000。
- The nucleon field and delta field interact through a scalar field and a vector field ,while the pion and rho meson mean field vanish in symmetric nuclear matter in the mean-field theory. 我们采取核子场 和 场 通过标量场 和矢量场 相互作用,而在平均场理论中对称核物质的 介子和 介子场消失。
- The field artillery pounded away at the for tress. 野战炮兵连续炮击那座要塞。
- Note: Numerals outside brackets means field value, and numerals in brackets are the value of the same population after two years transplanting. 注:括号外数字为野外测量值,括号内为同一居群移栽后第二年的测量值。