验证理论

Based on the Sino-US Forest Health Cooperation Program, along with review on lots of foreign and domestic literatures, the historical trends of attributes of forest and the concept of health in the modern society are discussed and the concept of forest health is redefined, combining the methods of logic discursion with demonstration analysis, qualitative analysis with quantitative analysis and the ecology with other related science from point view of macro and middle scope aspects.

本研究依托中美森林健康试验示范区建设，结合大量的国内外文献分析，从中观和宏观角度，采用逻辑推理与实证分析、定性分析与定量分析、生态学和其他学科相结合等方法，讨论了森林属性的历史演变和现代健康观，对森林健康进行了重新的定义，首次尝试建立了基于中国林情的森林健康基本理论体系，构建了森林健康的评价方法，结合文献研究对城市森林、农田防护林、马尾松林、笋用雷竹林的健康评价进行了理论验证，并通过江西信丰崇墩沟流域森林健康评价进行了案例分析。

In order to validate the effect of concrete carbonization accelerated by wind ,three groups of concrete beam carbonization experiment with different sections respectively (rectangle,Ttype and Ⅱ type ) were analysed. Based on the theoretical analyses and experimental results, it is concluded that the wind swirl and the fosse moat effect can also accelerate the concrete carbonization.

为了验证风对混凝土碳化的加速作用，本文分析了三种截面混凝土梁的碳化试验，依据理论分析和试验结果，得出风的旋涡和壕沟效应可以加速混凝土的碳化，完善了风加速混凝土碳化的理论。

What was more important, the coupling loss factor of gemel coupling structure had been analysised detailedly thoeretically and experimentally.

同时通过理论推导和试验验证，较系统地推导了车辆上常见的铰链耦合结构的耦合损耗因子计算公式，完善了统计能量分析的理论框架。

According to the studied results at present, the studied objects are mainly thin plate and beam about sound radiation mode, a method computed sound radiation mode of complex structure is presented in this dissertation, according to the results of the previous two chapter, a theoretical method to solve acoustical radiation mode and acoustical radiation efficiency of complex structure by boundary element method and acoustical radiation theory is posed, the acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regard to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results. According to results of the form three chapter, the structure sound radiation sensitivity is studied in detail, the sound radiation power of structure can be expressed as positive Hermitian quadratic form, the sound radiation sensitivity can be expressed as two parts by partial differential with respect to design variable, which are sensitivity of boundary velocity and impedance matrix, combined with the theory of FEM and BEM, the structure sound radiation can be translated to the analysis of structure dynamic sensitivity and impedance matrix sensitivity. The theory posted in this dissertation is tested by the FEM software ANSYS and the software AAS programmed by author.

在前几章的基础上，通过结构声辐射的模态理论对结构的声辐射的机理进行了深入地探讨，针对目前声辐射模态的研究对象主要是简单的板和梁类结构，提出了一种计算复杂结构声辐射模态的方法，利用前两章研究所得的结论，将边界元方法与广义特征值的理论结合起来研究了复杂结构的声辐射模态与声辐射效率，先将结构的声辐射功率表示为一个正定的厄米特二(来源：ABb7C论文0909网www.abclunwen.com)次型，运用广义特征值分解求解了复杂结构的声辐射模态，然后利用声辐射模态关于阻抗矩阵与均方速度耦合矩阵的正交性，求解了复杂结构的声辐射效率，最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。

The condition for the existence of positive elliptic periodic solution was found using Floquet theory; and the theorem of the existence of positive elliptic periodic solution was proved by the method of upper and lower solutions and homotopy invariance theory of topology degree; then an example was given.

利用Floquet理论得到了该方程的正椭圆周期解存在的条件；然后利用上下解方法和拓扑度的同伦不变性理论，证明了该模型正椭圆周期解的存在性定理，并进行了实例验证。

Based on Huygens' principle, the basic equations in the ideal medium and the theory of field diffraction, the paper gives theoretical studies of ANC in space, including the mechanism of attenuation of noise, basic characteristics of radiation and the way of energy transfer.

本文从Huygens原理、理想媒质中的基本方程和场衍射理论出发，对空间有源消声的基本理论进行了探讨，分析了次级声源的消声原理、基本辐射特性和能量转换，提出了空间有源消声所减小的声能主要通过次级声源和初级声源本身转换成其它形式的能量的思想，并在实验上进行了验证。

Meanwhile , the measurement error of contact angles caused by the measurement error of droplet height , the bottom diameter of droplet and the turning error of protractor were discussed : Verification experiments were performed and the results obtained are coincident with the theory . Finally , hypsometry is proved to be more precise , faster and more convenient .

从理论上对这2种液滴角度测量法的测量原理和测量误差进行比较分析，分别讨论了液滴高度，底端直径的量取误差和量角器转动误差产生的接触角测量误差，并用实验进行验证，这些实验结论和理论相符，最后证实量高法更准确，快捷，方便。

Many educational games software have been made both at home and abroad,but because they doesn\'t have developed theory instruction,lack the support and verification of practice,they\'re not perfect; there\'re many defects,for example,it combines games and knowledge points very incondite and the design strategies of educational games are not enough systematic.

海内外已经呈现了良多教育游戏软件，但因为没有成熟的理论指点，缺少实践的支持和验证，理论体系都还不够完美，存在诸如娱乐性和教育性的结合不幻想、教育游戏设计的策略不够体系等缺点。

The conclusion and method are instructional to design and use of this type of sensor.

笔者从理论上分析了电源频率对差动变压器输出特性的影响，进行了实验验证，同时给出了减小这种影响的方法。1理论

The main research methods are:(1)Theory analysis:from the 2D plane geometry analysis, dots continuity characteristics are found. The first time irrational fraction algorithm is used in FM program.(2)Experiments reaearch:experiments of condition halftone function are designed under the cross-experiment principles. The first time variable information printer and C# language are used in experiment.(3)Data processing:new type digital density apparatus is used to measure data. Compare is used in processing data and error cause are explained. The main works as follows:The dot area percentage has been gained and new condition halftone function has been set up.(2)After being corrected, speed of irrational fraction algorithm has been compared with multiplicative congruence algorithm's.

本文的主要研究方法有：(1)理论分析：运用数字加网原理，从二维平面几何分析入手，借助实验验证研究网点连续特性；首次系统地把无理数取尾法随机数生成器引入到调频加网系统中，根据实验修正生成器的模型，运用统计假设检验理论，对生成的随机数序列进行统计假设检验；(2)实验研究：根据正交实验法则设计实验，首次采用可变信息印刷机(HP Laser PS印刷机)输出实验样张，克服了用传统胶印机作实验影响因素多的缺陷；采用新型数字式密度仪测量密度值，提高了数据精度；采用最新编程语言编写调频加网程序；(3)数据处理与分析：利用平均值比较法处理数据，对误差产生的原因进行讨论。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。