子模型

In this paper the characters of MA model and the trust region method are analyzed, a subproblem with MA model and trust region technique is presented, and a projected gradient method is use.

本文分析了MA模型和信赖域方法的特点，构造了MA模型信赖域子问题，并利用投影梯度法进行求解，在此基础上提出了一个新的求解非线性规划问题的MA模型信赖域方法。

Firstly, the performances of linear and nonlinear algorithms based on interference estimator/subtracter are compared. Secondly, a novel interference suppression algorithm based on subspace tracking is proposed for the tone interference model. Finally, the stability performance of the transform domain normalized least mean square adaptively implementing structure of minimum bit error ratio receiver is analyzed.

总结和比较了基于AR干扰模型的各种干扰估计抵消算法性能；从音调干扰模型出发，提出一种新的基于子空间跟踪的时域干扰抑制技术；讨论了基于低速数字干扰等效"虚拟"多用户干扰模型的最小误码率接收机的变换域归一化最小均方自适应实现结构及其稳态性能。

The dissertation focuses on reviewing the proposed different hysteretic damping force versus velocity models of the MRD, and further proposes a generalized model which decouples the current control dependence on magnetic field and the hysteron dependence on exciting nature and is easy to derive the inverse model.

论文在综合分析国内外学者提出的MRD各种滞环阻尼力-速度特性模型基础上，提出了MRD的依赖于直流磁场的电流控制特性和依赖于激励性质的滞环算子可分离的半主动控制特性，建立了相应的电流控制与滞环特性相分离的一般化模型，且易于求解其逆模型。

Are typically denormalized or collapsed into a flattened dimension table. Iftransaction processing systems, you'll need to resist your instinctivesubdimensions; dimension denormalization is the name of the game indimensional modeling.single dimension table. One-to-one relationships, like a unique product

如果你将你生涯的大部分用于为事务处理型系统设计实体关系模型，你需要抵抗你的本能的冲动去将雪花模型的多对一的关系转化为更小的子维度；在维度模型中里单个维度表中的属性存在相对的

To arrange the prestressed tendons and anchor devices on the web of box girder conveniently, a theoretical analysis, numerical calculation and model test on local stresses in concrete under anchor devices were performed separately using a typical segmental model, a subrange model and a similar model for the scheme design of Hutiaomen major bridge.

为便于箱梁腹板预应力筋及锚具的布置，结合虎跳门连续刚构桥的方案设计，对特征节段模型、子区域模型和试验模型锚下混凝土局部应力分别进行了理论分析、数值计算和试验研究。

The formulized predictive control presented in chaper 5 is applied to the control theory of discrete event systems. System behavior model is established for discrete event systems.

在离散事件系统上建立与系统行为描述相对应的模型，并在此基础上建立了相应的预测模型集、子预测模型集、公共区域等概念。

The crown surface area was decreased with stand density and the relationship between crown volume and stand density was not significant.

林分树冠表面积和树冠体积预估模型的检验结果表明，两个模型的平均相对误差都在 8％之内，预估精度均大于91％，说明所建模型可以很好地预估樟子松人工林不同林分条件下的林木树冠表面积和树冠体积。

By employing the Jordan-Wigner transformation and a modified mean field method, we are able to determine its ground-state quantum phase diagram approximately. The chapter IV is the main part of this Thesis. It contains the main innovations in our work. We propose and study in detail a S=1 Ising chain with the interplay of single-ion anisotropy and dimerization. The main results and innovations are the following: We show that the total number of the zero-component of spins at each site is a conserved quantity. This quantity, which may intuitively called as hole's quantum number, is hidden in the system. We show further that the hole's number in the ground-state is zero; By using the Jordan-Wigner transformation, we map this model onto a series of subsystems described by the spin 1/2 dimerized transverse Ising model. We solve the subsystems exactly, by presenting the exact wave functions and spectra;We show that this system exhibits a series of quantum phase transitions by varying the dimerization strength. We determine the quantum critical points exactly. We also show that the criticality is the same as that of the uniform S = 1/2 transverse Ising chain.

第四章是本文的重点及主要创新内容，我们具体研究了自旋为1的在横向单离子晶格场中的一维二聚化Ising链，我们得到的主要结果和创新之处是：(1)证明了这一模型具有一种隐藏的对称性，即自旋第三分量为零的格点数目是一个守恒量，并证明基态出现在空穴数目为零的子空间中；(2)利用Jordan-Wigner 变换将此模型变换到一系列自旋为1/2的横磁场中的二聚化Ising 模型，并给出了相应严格的波函数及能谱；(3)我们发现系统的基态随着二聚化强度的变化将呈现出一系列量子相变，我们得到了量子临界点的精确位置，并证明其临界性质与自旋为1/2的横磁场中的均匀Ising 链中的临界行为属于同一普适类。

But because difference among the predictions of different theoritical models in low z region is small, it is hard to tell us which model is more compatible with the experimental result. Our results from high z binning show a good consistence with the predictions based on z-dependence SU (3) asymmetry, quark-Diquark and pQCD model, which indicate the ud quarks in Λ hyperons provide contributions as well as s quark and the contribution is the function of z.

高z区间分法下归一法和螺旋度平衡法的分析结果显示同z依赖的SU（3）对称模型、夸克--反夸克模型和pQCD模型预言的纵向自旋转移值S〓和z的关系较一致，从而表明Λ超子中u夸克不但对Λ的极化有贡献，而且其贡献和Λ携带的能量份额z有关系。

The results show that a the variation of annual mean runoff of Huayuankou section exist an intrinsic dynamic mechanism, which is the results of joint action of affecting factor of periodicity and non-periodicity, having obvious chaos characteristic; b the correlation dimension of attractor of phase space is 5.09 and saturation inserted dimension is 14. It shows that to establish a mathematical model of the annual mean runoff system of Huayuankou at least requires 6 independent variables and the required saturation inserted dimension for rebuilding phase space is 14; c the steady estimate of Kolmogorov entropy is 0.14, showing the average predictable time of the annual mean runoff variation of Huayuankou is about 7 years and; d using nonlinear deterministic chaos model is more suitable to describe the variation of annual mean runoff of Huayuankou.

结果表明：①花园口年平均径流量变化存在着内在动力学机制，是由周期性和非周期性影响因子共同作用的结果，具有明显的混沌特性；②相空间吸引子的关联维为5.09，饱和嵌入维数为14，这说明要建立花园口年平均径流系统的数学模型，至少需要6个独立变量，重构相空间所需要的饱和嵌入维数为14；③Kolmogorov熵的稳定估计为0.14，说明花园口年平均径流量变化的平均可预报时间大约为7年；④用非线性确定性的混沌模型比完全的随机模型更适于描述黄河花园口年平均径流量的变化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。