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Thirdly, in chapter 4, theoretical analysis for the method of knowledge acquirement, the method of knowledge denotation, the method of knowledge inference, the method of knowledge explainer during the course of building fault diagnosis expert system of elevator controller.Fourthly, in chapter 5, theoretical analysis for the function of database in the fault diagnosis expert system, and the course of database logic design, then built the table by E-R model of RDBMS.

通过对数据库系统的功能分析和逻辑分，用关系型数据库的ER模型建立了电梯控制系统各实体之间的关系，建立了关系数据库；接着讲述了对该数据库的管理和维护。

The interior sound pressure levels and exterior sound pressure levels of the complex box structure excited by an exterior point load are measured, and a good agreement between the theoretical results and the test results shows that the theoretical method and corresponding results are correct.

通过对几种具有理论解的结构辐射声场的分析，验证了本文理论的正确性，研究表明本文方法具有很高的精度；同时对复杂箱形结构进行了实验验证，在实验室条件下测量了复杂箱形结构在外部点载荷激励下的内、外部辐射声压级，与理论预估值比较表明，二者具有良好的一致性，进一步证实本文所建立的理论预估方法是有效的。

The far field sound pressure levels of the cylindrical shell and spherical shell excited by an exterior point load are measured, and a good agreement between the theoretical results and the test results shows that the theoretical method and corresponding results in this dissertation are correct.

主要研究内容：(1)建立了考虑流固耦合作用并在流体流动条件下部分充液或者部分浸没圆柱壳体运动方程，应用波数域法和传递矩阵法得到了该类壳体振动响应的径向波数域速度，进而应用平稳相位法得到了该类壳体辐射声场的预估理论模型。

All the issues directly or indirectly influence value and price of the NPAs. The methodologies including static and dynamic analysis, micro and macro analysis are applied to address the basic theoretical and specific problems in the research. The analysis on value and price of NPAs can fill some vacancies of the theoretical research about NPAs, and reveal the internal links among current relevant theories about fictitious capital /assets, financial risk, financial crisis, portfolio selection and assets pricing models, assets assessment and evaluation technologies.

不良资产价值和价格分析可填补现行不良资产研究中基础性研究的某些不足，并可将现行与不良资产价值和价格分析相关的理论如金融资产或虚拟资本理论、金融风险理论、金融危机理论、资产组合与资产定价模型以及资产评估技术等有机地联系起来，将现行理论所研究的内容的内在联系表现出来，并在一定程度上弥补现行理论的不足。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

A practical FOH is made under theoretical instruction, and the experimental result is in good agreement with that of the theoretical analysis.

根据理论设计结果，制作了光纤水听器样品，实验与理论分析结果相一致。

With coupler embedded and acceleration sensitivity compensation design, the structure symmetry is insured, which can induce the acceleration sensitivity effectively. The acceleration sensitivity compensation design also improves the production efficiency of FOH for towed linear array application.2. A good theoretical simulation platform, utilizing the method of elastic mechanics and the finite element method, is established, which can provide an effect predictive design for FOH. The experimental results are in good agreement with the theoretical analysises.3. Some key technology problems in the making of FOH for towed linear array application are conquered. The new developed FOH, with an acoustic sensitivity of -143.0dB, has acceleration sensitivity less than -30dB, which exceeded to results from other international reports.

本论文的主要成果和创新在于：1、提出了耦合器内嵌、带加速度灵敏度微调补偿的低加速度灵敏度光纤水听器结构，最大程度保证了工艺结构的对称性，实现了对工艺误差的有效补偿，提高了低加速度灵敏度光纤水听器研制的成品率。2、采用弹性力学和有限元方法建立了拖曳线列阵光纤水听器理论设计平台，实验与理论分析结果相一致，这为优化光纤水听器的结构设计提供了有效的技术手段。3、解决了拖曳线列阵用光纤水听器制造的关键技术问题，研制出声压灵敏度为-143.0dB，加速度灵敏度低于-30dB的拖曳线列阵用光纤水听器，其加速度灵敏度优于国际上已报导的结果，并在国防水声一级计量站对其进行了性能指标测试(来源：A14BC论文网www.abclunwen.com)。

Characterized with the combination of origin and phenomena, its theoretical method achieves the recognition of the formlessness and iconlessness from the general emphasis on the analysis of form and icon, and then obtains the whole grasp of the double operation of Wu and You. Thus a new way and method is establishedto explore the myth of the universe and human life and to reveal the essence of the relationship between human and nature, displaying before humans eyes a fuller and completed theoretical system of Human-Nature-Unity of traditional Chinese culture quality.

其理论方法以根源与现象的结合为基本特征，从一般重于有形有象的分析，突破到对无形无象的认识，进而达到无有双运的整体掌握，为探索宇宙人生奥秘，揭开人天关系的本质开辟出新的道路和方法，把一个具有中国传统文化特质，更加充分、更为完备的人天整体理论体系展现在人类面前。

of Theoretical Physics and the physical nature and targets of the disciplinary procedures. In 1859, according to Kirchhoff solar spectra and thermodynamic interpretation of Fraunhofer lines, asserted that the sun and Earth-like existence, in some chemical element, indicating that can be used in theoretical physics, experimental results from the universal laws of astronomical objects to the inherent nature of the astrophysical theory of the beginning.

利用理论物理方法研究天体的物理性质和过程的一门学科。1859年﹐基尔霍夫根据热力学规律解释太阳光谱的夫琅和费线﹐断言在太阳上存在著某些和地球上一样的化学元素﹐这表明﹐可以利用理论物理的普遍规律从天文实测结果中分析出天体的内在性质﹐是为理论天体物理学的开端。

In existing technology, the nonnal way is adopting the four-bar linkage mechanism to imitate the arc or the linear movement. On the theoretical analysis, its movement precision can meet the requirement, while in the operation, because of the abrasion of bearings in gemel, which do much greater effect on movement than the former, its movement precision goes much beyond the theoretical value.

现有技术中一般是采用四连杆机构来仿弧线或直线运动，从理论上讲其运动精度是能够满足要求的，但在实际使用中，由于铰链点轴承的磨损（另外，装配时也预留了一定的轴承间隙），对运动轨迹产生的影响很大，其运动精度就大大超出理论值。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。