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In short, this Point-Research Program hope to find out a new way to re-read the literal canons, to widen the fields of research, to reveal the multiplicity and polyvalence of the texts.

总之,本计画就是希望透过这项重点研究,重新阅读文学正典,开拓研究领域,审视文本的多元性和多质性,并提领出相关的理论论述,供日后研究暨发展文学及文化研究之参酌。

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。

Based on the study of a Pareto optimal for multiobjective optimizations , the Genetic algorithms for MOP is studied. Four new operators are introduced into this MGA that are niche technique, Pareto optimal set, nondominated rank and fuzzy penalty function method.

在研究多目标优化有效解集的基础上,对处理多目标优化的遗传算法进行研究,引入小生境技术、Pareto过滤解集,给出了非劣解排序的方法;对小生境技术引入的优越性进行了比较研究,通过算例检验了本文研究的多目标遗传算法的有效性。

By systemic researching and simulating experiment, the text gains such results as follows,1. On the base of sufficiency research on the oil-gas hydrocarbon systemic chemistry composing and the physical chemistry characters, we traverse the mechanism of the paraffin's deposition. Then we consider that paraffin deposition is a complex process ofphysical chemistry, which includes more than one single mechanism.2. Traversing and comparing the literature in detail on different factors that has effect on paraffin deposition, the available experimental methods on paraffin deposition, prevention of paraffin deposition, and removing of the deposited paraffin on the spot.3. Ameliorated the laser equipment of solid particle inspecting system and the corresponding test methods. Determine WCT of dead oil and live oil from KS101 well under different pressure with this system. The result implies that dead oil has opposite regulation on paraffin deposition temperature to live oil.4. A vapor-liquid-solid envelop is drawn by superposition regular vapor-liquid envelop and WCT curve thereby explained that the departure and quick raising of the curve in the low temperature zone is caused by the appearance of paraffin in solid phase.5. Estimation is made to determine the depth of paraffin deposition in the well.

通过系统的研究和实验模拟,本文取得了以下研究成果:(1)在充分调研油气烃类体系的化学组成及其物理化学特征的基础上,详细研究了石蜡沉降的机理,认为石蜡沉积是一个复杂的物理化学过程,是多种机理共同作用的结果;(2)深入调研并综合阐述了影响石蜡固相沉积的各种主要因素,对目前国内外常用的有机固相沉积实验研究方法和现场清防蜡措施也做出详尽的描述,并加以对比评价;(3)改进了油气藏开发重点实验室自行研制组装的高温高压下测定固相沉积的激光装置和测试方法,并用该套设备测定出柯深101井的井口脱气油样和凝析气平衡油样不同压力下的析蜡点,实验结果表明,脱气油和平衡油析蜡规律相反;(4)将常规气-液两相相图和析蜡曲线叠加得到了气—液—固三相相图,从而解释了气-液两相等液量线在低温区域偏离正常并快速上翘是由于体系有石蜡固相出现;(5)利用实验测试的析蜡温度预测析蜡位置,表明只有在距井口465m油管以上会有蜡析出。

And it analysed the state qua of the self-dependent innovation capability of modern service industry of chongqing, and found out the problems and the deficiencies of it, referred the advanced experience of the others both in land and abroad, to construcht the self-dependent innovation strategy of the modern service industry of chongqing, to advise for the government and the enterprise to improve their self-dependent innovation capability.

本文通过对相关政府主管部门进行调研,获取资料;并采取比较研究、文献研究和专家论证相结合的研究方法,对重庆市现代服务业的自主创新能力的现状进行了研究分析,找出重庆市现代服务业自主创新中的存在的问题和不足,充分借鉴国内外的先进经验与做法,力求构建重庆市现代服务业自主创新战略,为政府和企业提高自主创新能力提供参考和借鉴。

This article got the information through the investigation of the related government in charge, adopted the research methods as compare research, literature research and expert reasoning. And it analysed the state qua of the self-dependent innovation capability of modern service industry of Chongqing, and found out the problems and the deficiencies of it, referred the advanced experience of the others both in land and abroad, to construcht the self-dependent innovation strategy of the modern service industry of Chongqing, to advise for the government and the enterprise to improve their self-dependent innovation capability.

本文通过对相关政府主管部门进行调研,获取资料;并采取比较研究、文献研究和专家论证相结合的研究方法,对重庆市现代服务业的自主创新能力的现状进行了研究分析,找出重庆市现代服务业自主创新中的存在的问题和不足,充分借鉴国内外的先进经验与做法,力求构建重庆市现代服务业自主创新战略,为政府和企业提高自主创新能力提供参考和借鉴。

For example, it is stall need to study the thermal equation-of-state, to find a proper methodology for calculating self-diffusivity, to propose a better potential model for mullite and sillimanite, to calculate mechanical properties at high temperature, and to analyze the structural transformation at high temperature.

本研究所建立的研究方法与流程适合应用在陶瓷材料的模拟与分析,而我们已经探讨了莫来石的缺陷对晶体结构、晶格常数、热膨胀、体模数、缺陷能、氧扩散的影响,接下来可以朝向以下几点深入研究,包含研究热状态方程式、找出最适当的方法来计算扩散系数、提出更好的分子势能模型、研究莫来石在高温下的相变化与力学性质。

Beijing is provided with typical urban landscape, forest land is the maximal and basal landscape patch type (area proportion 42.534%), glebe field (28.754%),spinney land and urban (26.912%) and town residential landuse (10.344%) are main landscape patch categories in Beijing. From landscape, landscape patch types and landscape patch categories levels, landscape patch distributing centralize, and patch shape is simple, main landscape patch fractal dimension indexes are under 1.1, so urban landscape pattern is high influenced by human disturbance.2. From 1985 to 2007, Beijing landscape pattern variational characteristics are as follows:(1) During 1985-2007, patch types and categories change is little, but area and patch number of patch types and categories change distinctly. Town residential landuse area increased 7.66% of Beijing total area, farmland and forest land area decrease in the mass. The total patch number increased at first then decreased. taking one with another, the total number is decreasing, and patch number of farmland and forest land are most distinct.

本研究的主要研究结果如下:1、北京市具有典型的城市景观特征,林地用地的面积占市域面积的42.534%,为基质景观斑块类型,旱田(28.754%)、灌木林(26.912%)、城镇用地(10.344%)是北京市主要景观斑块种类;从景观、景观斑块类型以及景观斑块三个层次的研究均表现出北京市各景观斑块类型及景观斑块集中分布的现象十分突出,斑块形状简单,主要景观斑块种类的景观分维度指数值均不足1.1,表明城市景观格局受到了较大的人为影响。2、北京市1985-2007年间城市景观格局的主要变化特征表现为以下几个方面:(1)在研究时段内,北京市景观斑块种类变化不大,景观组分面积和斑块数变化明显,其中最为显著的是北京市城镇建设用地面积呈单纯的增加趋势,增加幅度为北京市总面积的7.66%,农业用地与林地的面积虽呈波动变化但总体呈减少趋势;景观斑块数量先增后降,总体呈下降趋势,其中耕地与林地斑块数的变化最为明显。

We choose Huzhou for investigation, talk about the CRURS system"s performance. Then on the basis of theoretical analysis, we puts forward the research hypotheses, explores the main factors internal that have impact on farmers" attention on CRURS using the Logistic model analysis. We try to find out the main facts that have impact on farmers attention on CRURS, and provide the academic stanchion and policy advice for CRURS to safeguard the rights and interests of farmers.

本研究在参考国内外相关的研究成果和对现行制度分析的基础上,通过对浙江省湖州市农村的实地调研,在理论分析并提出研究假设的基础上,构建Logistic模型,尝试从农户的角度出发,对农户宅基地使用权流转的意愿进行实证研究,尝试找出影响农户宅基地使用权流转意愿的主要因素,为逐步开放宅基地使用权流转提供理论上的支持和相关政策建议,充分保障农民实现宅基地的使用权益。

The essence research of symptom complex is an important part of basic theory study in traditional Chinese medicine. There are a lot of good results in its forty years' research history, at the same time, we can also see some problems, which always make us puzzled in our research process.

证候实质研究是中医基础理论现代研究的重要组成部分,在40年艰难曲折的研究历程中,取得了一些成绩,也暴露出许多问题,使目前的研究面临诸多困惑,如何摆脱这种困境成为学术界持续关注的热点。

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推荐网络例句

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

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