查询词典 model theory

The monotony and extremum theory of function are applied to prove the geometrical characteristic of error hand for 2D linear segment uncertainty ε(subscript σ) model in theory. The result shows that the error hand has the geometrical shape of "larger ends and smaller middle" or "one end larger and the other smaller". The minimum width and its exact position of the error hand are calculated too. It is proved that the minimum width position of the error hand is near the end with the smaller mean square error.

运用函数单调性和极值理论，从理论上证明ε模型的误差带的几何特征；得到线元误差带不仅具有&两端大、中同小&，而且也可能具有&一端大、一端小&的几何形状；给出了误差带的最小带宽及其位置；论证了误差带的最小误差带宽的位置靠近中误差较小的一端。

Based on t he characteristic of vehicles arrive flow , we apply the method of queue theory t o develop the optimize model for the purpose of the lowest of time losing of toll system. Then we apply the queue theory to explain the best tollgates deployment.

根据车辆到达流的随机特点，运用排队论方法建立起以收费系统时间损失最小为目标的优化模型，然后求得最佳车道配置。

Aiming at disjunction of microcosmic researches and macroscopical researches and status quo of theory basis researches of Aeolian sand movement near the sand bed, based on plenty of experiment data in wind tunnel, this thesis studies some microcosmic researches including the number of lift-off sand grains percent time percent sand bed area and relative movement parameters of saltating sand grains by combined methods of mechanical and statistical mechanical theories. Then, this thesis develops in advance a relation between the microcosmic researches and macroscopical researches in order to describe truly the theory model of some macroscopical physical variable of Aeolian sand movement.

本文针对当前风沙运动微观与宏观研究相脱节、准确描述近地面风沙运动规律的理论基础薄弱的现状，基于大量风洞实验数据，通过对沙床面单位时间单位面积起跳沙粒数、沙粒跃移运动过程中相关参数等微观问题的研究，力图建立风沙运动微观与宏观研究的联系桥梁，以期能够准确描述风沙运动宏观量变化的理论模型。

An application of modeling and optimization on pilot relief valve is researched using the theory presented in this dissertation. Compared with the results obtained by mathematical model and experiments, the results of application using the theory is satisfactory.

运用本文提出的建模与优化理论，以液压系统中常见的先导式溢流阀为对象进行了建模和优化，并与数学模型的仿真结果以及实验结果进行对比，取得了较满意的结果。

Based on analysis of the theory and experiment, optimal design ways are suggested. Then the scale-up of pin mill is studied by means of similar theory, which will povide theorecal basis for scale-up of mill from optimal experiment model mill to practice mill.

在理论及实验分析的基础上，提出了销棒粉碎机的设计思路，并采用相似理论对粉碎机的模型放大进行了分析，研究了由优化的实验模型向实体模型放大的方法，为销棒粉碎机的设计提供了理论基础。

For the DE theory, the itinerant electron is mobile in the metallic FM domains and polarons can only transport in the PM domains. In the IM transition region, the conductivity is the sum of the polaronic and itinerant electronic conductivity. Under this model, the DE theory yields agreement with the experimental resistivity excellently.

在DE理论中，金属性铁磁畴中的巡游电子是可传导的，而极化子只能在绝缘性顺磁畴输运，在IM相变温区，体系的电导率是极化子和巡游电子的电导率之和，通过应用我们的模型，发现DE理论可以得到与电阻率的实验数据非常一致的拟合结果。

During the four years study on the project, we develop a dynamical forecast model that describing the subtropical ridge surface. A new theory on the role of the land-sea thermal difference on the formation of the Subtropical High is advanced. It is concluded that in the summer subtropics over each continent and its adjacent ocean LO, SE, CO, and a double-dominant heating from west to east compose a LOSECOD heating quadruplet. The influence of the Eurasia continent on SH varies according to the seasonal variation. From the ideal numerical simulation it is shown the important role of the Eaiuan continent and the huge topography on the mechanism of formation and mantanence of the SH during the summer. It is verified by the numerical simulation that the extension of the subtropical continent into the tropics greatly enhances the " East Asian monsoon". Through the Rossby energy dissipation theory it is verified that the deep latent convective heating induces the onset of the South China Sea monsoon over the Bay of Bengal. The relationship and mechanism between the precipitaiton over the East Asia and the Subtropicla high is illustrated by the data. It is also found the close phase lock between the east-west shift of the SH and the disturbence of the east wind belt over the tropical troposphere. The interaction between the structure and activity feature of the SH and the Meiyu over the Yangtze-Huaihe river valley is revealed from the data. The numerical simulation verified the impact of the different SH pattern on the path of the typhoon.

本项目的研究发展了描述副热带高压脊面变化的动力模型，提出了夏季副热带地区四叶型非绝热加热分布型及相应环流拼图的创新理论；明确了大陆尺度的海陆热力差异在副热带高压形成中的作用；指出欧亚地形对副热带高压和气候的影响随季节变化而变化，通过数值试验证明春季青藏高原的感热加热对亚洲夏季风的爆发地点起了&锚定&的作用，进一步证实了副热带高压断裂和亚洲夏季风的最早爆发地点发生在孟加拉湾东岸；利用Rossby波能量频散理论证明了孟加拉湾深对流潜热释放诱导南海季风爆发的机制；揭示了东亚季风降水的季节内变化与西太副高的关系及机理；揭示了西太副高与东西风带中扰动之间的相互作用过程，指出西太副高的东西活动与热带对流层上空东风带扰动和中纬度西风带扰动的移动和锁相密切相关；研究了夏季淮河流域梅雨期间副高结构和活动特征及其与江淮暴雨的相互作用；验证了不同副热带高压形态对台风路径的不同影响；通过数值试验证明了欧亚大陆和青藏高原等大地形对副热带高压形成和维持的重要作用。

I aimed at the use of "theory - in practice - theory - and then to guide practice" of research, by studying the history of international and domestic mergers and acquisitions, corporate restructuring at home and abroad the successful experience of the railway, using SCP theoretical analysis of the railway multi-enterprise status and future prospects for reorganization The article is expected to address the future of the railway company's strategic reorganization of multi-mode and performance problems, to choose the actual strategy of the railway restructuring of diversified business model, through re-expand the enterprise scale, increase market concentration, enhance core competitiveness, improving railway multi-enterprise performance.

偶自己旨在运用&理论—实践—理论—再指导实践&的研究方式，通过研究国际国内的并购历程、国内外铁路企业重组的成功经验，运用S-C-P理论分析铁路多元企业的现状和未来重组的陌景，文章预期解决铁路多元企业未来的战略重组模式和绩效问题，选择符合铁路多元企业实际的战略重组模式，通过重组扩大企业规模、提高市场集中度、提高核心竞争力，提高铁路多元企业的绩效。

I aimed at the use of "theory - in practice - theory - and then to guide practice" of research, by studying the history of international and domestic mergers and acquisitions, corporate restructuring at home and abroad the successful experience of the railway, using SCP theoretical analysis of the railway multi-enterprise status and future prospects for reorganization The article is expected to address the future of the railway company's strategic reorganization of multi-mode and performance problems, to choose the actual strategy of the railway restructuring of diversified business model, through re-expand the enterprise scale, increase market concentration, enhance core competitiveness, improving railway multi-enterprise performance.

本人旨在运用&理论—实践—理论—再指导实践&的研究方式，通过研究国际国内的并购历程、国内外铁路企业重组的成功经验，运用S-C-P理论分析铁路多元企业的现状和未来重组的前景，文章预期解决铁路多元企业未来的战略重组模式和绩效问题，选择符合铁路多元企业实际的战略重组模式，通过重组扩大企业规模、提高市场集中度、提高核心竞争力，提高铁路多元企业的绩效。

The theory of the reaction wheel is introduced at first,then the invariability theory of disturbing compensation and the math description of feed forward control.are recommenoled feed forward control and dead voltage compensation are added in the model of reaction wheel control.

中文摘要：对星载二维转台中反作用轮的控制技术进行了研究。介绍了反作用轮的作用原理，给出了扰动补偿的不变性原理和前馈控制的数学描述。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。