查询词典 dynamic condition

With the help of system mathematical model, the contradiction between increasing dynamic response of converter and decreasing the ripple of output voltage is elaborated based on the analyses of mechanism of the converter's dynamic regulation problem.

因此，借鉴交流电机理论中的空间坐标系概念，建立了该变换器的开关函数，提出了系统的数学模型，解决了用单相等效电路法分析三相PFC电路存在的问题。

In this paper to study the explosive resistance of the concrete frame member strengthened by adhering CFRP, the dynamic behavior of concrete, the HJC concrete dynamic damage model and the method to establish the model parameter are deeply analyzed.

本文以研究碳纤维布加固混凝土构件的抗爆能力为目的，对混凝土的动态力学性能，混凝土HJC动力损伤模型，以及其模型参数的确定方法进行深入分析。

According to the models of land use dynamic change, the research on the dynamic change on land use quantity, space structure and land use degree were carried during 1989 and 2001. The results of the research indicated that the area of cultivated land and saline land increased, and the area of meadow, water areas and wetland reduced within 12 years; The variety ratio of cultivated land, meadow, water areas and saline land changed relatively great; and variety ratio of forestland, land used for resident, industrial and mining changed more steady; The land use degree presented a reducible tendency.

研究结果表明，吉林西部在12年内耕地和盐碱地面积增加，草地、水域和湿地面积减少；总体上，耕地、草地、水域和盐碱地的土地利用变化率较大，林地、居民、工矿用地和湿地变化较平稳； 12年间土地利用程度呈减小趋势，全区十个县市中只有白城和扶余的土地利用处于发展期，土地生态环境相对较好，而其他地区由于土地生态环境呈现不同程度的恶化，导致可开发利用的土地资源逐年较少，土地利用潜力小。

For the four types of possible motions of caisson breakwaters, a dynamic analysis model of caisson breakwaters under breaking wave impact is founded and a numerical method is presented, which can be used to simulate the motions of caisson breakwaters. A small scale model test is designed, which can be used to examine the dynamic analysis model and numerical method.

本文对近破波作用下防波堤的动力响应进行了研究，针对防波堤的四种运动情况，建立了沉箱式防波堤的动力分析模型和数值模拟方法，并设计了一个模型实验，通过实验对所提出的理论模型和数值模拟方法进行了检验。

The dynamic responses of caisson breakwaters under breaking wave impact are studied, a dynamic analysis model with a mass-damper-spring system is founded and a numerical analysis method is developed to simulate the four types of possible motions of caisson breakwaters.

对近破波作用下沉箱式防波堤的动力响应进行研究，建立了质量—弹簧—阻尼器的动力分析模型和沉箱式防波堤四种可能运动形式的数值模拟方法； 2。

In later following experimental researches performed, this paper summarized the approaches applied to the time-domain and frequency-domain analysis of dynamic pressure and dynamic chemiluminescent density.

然后总结了燃烧室中热声振荡的相关判据和驱动和阻尼机理以及理论和模型分析方法。并阐述了本文的实验研究应用的动态压力和动态化学发光强度等动态数据的时域和频域分析方法。

This paper discloses the poor ability of man's prevention from fire conflagrations through the analysis of man's quality , behavior and dynamic role, pointing out that man's quality has to be improved, his behavior to be regulated and his dynamic role to be exerted in order to develop in accordance with nature, reduce fire conflagrations.

通过分析人的素质、行为和能动作用，揭示人类防御火灾意识偏低的原因，指出人类要实现人与自然协调发展，减少火灾的侵袭，就必须提高人的素质，规范人的行为，发挥人的主观能动作用。

The dynamic response of the large crosssection shallow tunnels in new sand loess under viscouselastic boundary is calculated by means of transient dynamic FEM so as to find out the weak points of the lining and the stress, deformation and safety of the tunnel structure.

对大断面浅埋砂质新黄土隧道，利用瞬态动力学有限元方法，计算了粘弹性边界条件下，隧道在Ⅷ度地震荷载作用下的动力响应，找出衬砌的薄弱部位和结构的受力、变形及安全性，为设计提供指导和参考作用。

The algorithm is modeled by recent-biased dynamic least square support vector regression, therefore it can solve learning problem by linear equation and track dynamic of data stream accurately by incremental and decremental learning mechanism.

该算法由于采用了基于RBDLS-SVR方法建模，将SVM的学习问题转化为解线性方程组问题，并采用了增量遗忘机制高精度跟踪数据流动态。

PartⅢDiagnostic strategy of Breast Lesion using combination of dynamic contrast-enhanced and diffusion-weighted imagingPurpose:To evaluate the diagnostic accuracy of a combination of dynamic contrast-enhanced MR imaging and diffusion-weighted MR imaging in characterization of breast lesion and to find the strongest discriminators between malignancy and benignancy.Materials and Methods:223 patients with 236 pathology-confirmed breast lesions were examined using EPI-DWI,FSE-T2WI,SE-T1WI,DCE-MR imaging were performed using VIBRANT sequence.

第三部分磁共振动态增强扫描结合扩散加权成像诊断乳腺癌的策略研究目的：分析乳腺良、恶性病变的形态学表现、血流动力学表现，结合ADC值，采用单变量和多变量分析，挖掘有意义的恶性MR征象，制定乳腺癌的诊断策略，探讨动态增强MR(dynamic contrast-enhanced MR imaging，DCE-MRI)结合DWI对乳腺病变的诊断和鉴别诊断价值。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。