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The challenge is how to combine the environmental benefits of a strategy to use local and reclaimed materials with the benefits of prefabrication.

挑战是，怎样结合有益于环境的，致力于使用本地可再生原材料的策略和预制配件的利益。

How to combine the resource expenditure with the evolution of institution primely?

如何才能够将这种资源的耗费同制度的演进很好地结合起来？

The new method gives out a set of equations based on the fundamental algebra rules that principal stress trace obeys and the essential attributes it possess, we then combine these equations with further information described in this paper leading to an exact description of the conic representing the principal stress traces.

该方法是根据主应力迹线满足过任意三条等倾线的主应力都可以用二次曲线来描述这一条件，再利用主应力迹线本身所具有的性质列出方程组解算出描述主应力迹线的一元二次方程，然后根据方程描绘出所求的主应力迹线。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

The preventing and remedying desertification puts into practice prevention as main,principle of combining ecology protection with Prevensing and remedying,principle of preventing and remedy and economy development and utilization coodinated and promoting,comprehensive preventing and remedying and chassified control combines,public particlpation and renovating person benifits combine for different responsibility body bearing different responsibility bearing principle,becanse of man-made fault causing desartification preventing and remedying responsibility carrying out action-person bearing principle,principle of gorernment mainly bearing desertification recovery caused by nature action and benifit's person undertaking reasonable burban and decide unified planing system,systen of desertification status investigation and monitoring early warning system,fallow,limited cultivating hand and help-the poor combined systen,prohibitory systan,priority region and urgent-action region system.

文摘：沙漠化防治实行预防为主，生态保护与防治结合原则，防治与经济开发利用相协调促进原则；综合防治与分类控制相结合；公众参与和整治者受益结合；对不同责任主体实行不同责任承担原则，由人为不当活动造成的沙漠化治理责任，实行行为者负担原则；对自然作用造成的沙漠化治理实行政府负担为主，受益者合理负担原则；确立统一规划制度；沙漠化状况调查评估与监测预警制度，休耕限耕和扶贫结合制度，禁限制度，优先区域与紧急行动区域制度。

For years,Nanchang prosperousness combine co.ltd has been operating its business in compliance with international practice and domestic industry standards, which has brought good commercial creditability and reputation.

公司一直是以国际惯例和国内行业标准来开展经营活动，享有良好的商业信誉和口碑。

Provencal prints combine shades of primary colors with greens, lavenders, and bright orange.

与普罗旺斯印花纹结合的主色有绿色、薰衣草色和明亮的橙黄色调。

Uniting the PUDU with the HF partial discharge monitoring system fortransformer, we can get a practical combine monitoring system.

将特高频检测单元和变压器局部放电高频监测系统组合在一起，构建了联合监测系统。

In a food processor or blender, combine half of the ingredients and puree. Repeat with remaining ingredients.

在食物加工器或搅拌器中，加入一半的所有材料及浓缩的浓汤，搅拌后，重复一样动作，将另一半食材加入。

For this, with random Hough commutation is a foundation, through undertaking an analysis to sampling probability, combine Canny functor and method of Zernike orthogonality quadrature, the circle that put forward a kind to improve detects method.

为此，以随机Hough变换为基础，通过对采样概率进行分析，结合Canny算子以及Zernike正交矩方法，提出了一种改进的圆检测方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。