理论模型

By means of the semigroup theory, spectrum theory, positive cone theory, integrated equation theory and optimal control theory, we obtain the existence of thresholds of these models, the existence and stability of the infection- free equilibrium and the endemic steady state, and the existence of optimal vaccination strategies, etc.

运用泛函分析中的半群理论、谱理论、正锥理论以及积分方程理论和最优控制理论，系统地研究了这些模型的阈值的存在性，无病平衡态和地方病平衡态的存在性和稳定性，最优接种疫苗策略的存在性等。

This paper brings up with the theory of Virtual Coordinate Measuring System. The basic theoretic models of the virtual coordinate measuring system are given. This theory of virtual coordinate measuring system makes use of the principle of Time-Space correspondence and turns the time pulses into spatial displacement. The virtual coordinate measuring system can take the place of the scale system in traditional instruments, which has the disadvantages of high cost and difficulty ofproduction.

本文同时提出并建立虚拟坐标测量系统理论；该理论从传统的测量仪器出发，将传统仪器的实物标尺系统虚拟化，克服了实物标尺系统加工制造困难，及造价高等缺点，将硬件结构简化；本文提出并建立初步的虚拟坐标测量系统模型，并在三坐标测量机上建立了一维虚拟坐标测量系统的实验模型，初步分析系统的系统误差与其随机误差源。

This text proceed with the theory of the vibration, utilize typical elastic hinge law analyze structure dynamics characteristic when the blade is quivered to instability, and then use relevant knowledge of blade vibration to simplify the model and the aerodynamic force of the vibration. Through the simplification, we can get the equation of the blade, which is dispersed to its instability. Then VISUAL BASIC procedure is utilized to work out thecharacteristic value of vibration and the vibration frequency. At last comparing the result which is calculated by the above-mentioned theory formulae with the result which is calculated by internationally agreed procedure ANSYS to verify the accuracy of the formula of reduction.

本文从振动理论入手，利用最为典型的弹性铰链法分析叶片发生颤振失稳时的结构动力学特性，然后对振动模型及振动时所受的气动力进行简化，利用简化方程得到叶片发生发散失稳时的振动方程，利用编制的VISUAL BASIC程序解出振动的特征值并得到振动频率，最后分别通过上述的理论公式和国际通用的有限元程序ANSYS对风力机叶片模型进行发散失稳时的频率计算，验证简化公式的准确性。

Based on the research of current situation of risk management of capital allocation for commercial banks both at home and abroad at present, this paper put forward a unified VaR theory framework and model by using reserve for bad debts, capital at risk and deposit insurance system. The reserve for bad debts, capital at risk and deposit insurance system are used to execute grading risk prevention and to develop a comprehensive quantification method that executing risk management to commercial banks.

因此，在对目前国内外商业银行资本配置风险管理现状进行研究的基础上，本文提出了包含损失准备金、风险资本和存款保险的商业银行资本配置风险管理的统一的VaR理论框架和模型，用损失准备金、风险资本、存款保险制度来分级防范风险，并在此理论框架和模型下发展出完整的从资本配置的角度对商业银行进行风险管理的量化方法。

A plastic model was proposed which develops from the combination of boundary surface theory and multi-shear mechanism plastic theory. This model avoids the uncertainty and complication associated with the revision of Mansing's rule when a multi-shear mechanism plastic model is used, and is able to simulate the rotation of principle stress axes during seismic activities and the large shear deformation during liquefaction.

将边界面理论和多重剪切机构塑性理论结合起来并加以改进建立了多重剪切机构边界面塑性模型，避免了多重剪切机构塑性模型通过修正系统修正曼辛准则时的不确定性、复杂性；且能模拟地震时主应力轴的偏转和液化时剪切大变形。

However,for the large dimensional data.the sample covariance matrix is not a good estimator of the population counterpart.Many methods of parametric estimations and tests for multivariate statistical problems can not be simply used to deal with large dimensional data.

但是由于经典的大样本理论都是假定维数很小是固定的，故而经典极限理论并不适宜解决大维随机数据问题，很多多元问题的模型参数估计、模型检验的统计量已有的结果对大维海量数据并不能平凡推广。

The general design framework for PTIDS and its systematic architecture are put forward by means of systematic engineering method in this paper. The transmission capability is studied by making use of following model. The comparison between a practical transmission capability measurement of a road in Beijing and the theoretical result verifies research bound of following model, also its applicable condition, which provides essential technical setout for intelligent dispatch management of PTV.

1运用系统工程研究方法，提出了公交车辆智能指挥调度总体框架及其体系结构，采用跟驰模型理论进行了路段通行能力分析研究，并结合实际测量统计分析了北京市区某路段道路通行能力与理论计算进行了分析比较，验证了跟驰模型所涉及的研究范围及适用环境，为公交车辆智能化运营调度管理提供了必要的技术数据和准备。

As for the establishment of stochastic input-output models and the derivation of related theories, there are three points to be mentioned: firstly, the theoretical basis on which the ultimate requirements must comply with the index movement is given; secondly, the output control model is offered, which is based on the idea that the ultimate requirement is an index stochastic variable.

在随机投入产出模型的建立和相关理论的导出方面。一是给出了最终需求量服从指数分布的理论依据；二是提出了基于最终需求为指数型随机变量的产出量的控制模型。

We obtain a new quark potential from the effective dilaton-gluon-coupling inspired by superstring theory, and by using this static potential, we explore the mechanism of quark confinement through calculations of the spin-average energy levels, the widths of the leptonic decays and radiative transitions for heavy quarkonium. The obtained results are compared with that of the Cornell potenial.

由规范场理论的超弦理论所激发的伸缩子一胶子有效藕合，给出了一个新的静态夸克一反夸克势，讨论了此势模型下重介子的自旋平均能谱、轻子衰变和辐射跃迁宽度，并与Cdrn叭势模型所得到的相应结果作了比较。

The phase space reconstruction theory of chaotic dynamic system, in combination of the non-linear reflecting and pan-capacity of neural network, can be used to establish the prediction model; and a kind of new prediction method is suggested to realize the complete tracing of phase point evolution process and to predict "the price nails", whereby improving the prediction accurateness and effectively solving the problem of negative prediction, with the satisfactory results obtained.

采用混沌理论预测系统边际电价针对我国电力市场电价变化特点，利用电价和负荷时间序列的混沌特性，重构准确的电价序列相空间，通过跟踪相空间相邻相点的演化趋势，建立基于快速BP网络的电价预测模型，对我国川渝电网电价进行预测，取得良好效果利用混沌动力系统的相空间重构理论，结合神经网络的非线性映射和泛化能力建立预测模型，提出一种新的预测方法实现了相点演化过程的全局跟踪，对"价格钉"进行预测，提高了预测精度，有效解决了负预测问题，得到满意的结果。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。