查询词典 fluctuation

It is also possible to predict both the frequency and amplitude of pressure fluctuation at the inlet and outlet of all parts of turbine, as well as the phenomenon of rolling vortex in the draft tube.

从而得出水轮机各部件内的瞬时流态和随时间的变化过程，预测了水轮机各部件内压力脉动的频率和幅值，并显示尾水管内的旋转涡带现象。

The rattling model of a one stage gear system is established,in which mass unbalance,speed fluctuation of driving shaft and backlash of the gear pair are considered.

在考虑不平衡质量、主动轴转速波动及齿侧间隙的情况下，建立了单级齿轮传动系统的拍击振动模型。

Because the variations of wind speed and direction are random, with more and more proportion of wind power in power system, the influence of electric energy quality caused by voltage fluctuation, distortion ratio and flickering become more and more bigger.

中文摘要：由于风速和风向变化具有随机性，随着风电容量在系统的中的比例越来越大，风电并网后引起的电压波动、畸变率和闪变对系统电能质量造成的影响也会越来越大。

Considering the torque fluctuation of the driving shaft and the existence of the backlashes in both gear pair and clutch, a lumped mass gear- rattling model is established.

在考虑主动轴驱动转矩波动、齿轮副齿侧间隙及离合器间隙的情况下，建立了同时含有离合器间隙和齿侧间隙的齿轮传动系统拍击振动分析的集中质量模型。

The results of XPS about the boron-rich rare-earth borides synthesized by themethod mentioned above show that the valence of La is +3, and the valence of Smand Eu is a fluctuation system in which the average valence is about 2.6 for Smand 2.4 for Eu.

对〓(x=0.1，0.3，0.5，0.7，0.9)及〓(x=0.1，0.3，0.5，0.7，0.9)两个系列富硼双稀土硼化物的XPS研究表明：在这两个系列硼化物中La的价态均为+3价Sm的价态不随Sm含量的变化而变化，而Eu的价态随着Eu含量的变化而变化，随着Eu的含量的增加，Eu的价态逐步升高，当x=0.5时达到一极大值，然后随着Eu含量的增加Eu的价态逐步降低。

A computational method for prediction of pressure fluctuation induced by cavitating propeller on hulls of arbitrary shape is reported.

研究了空泡螺旋桨在任意形状船体上诱导的脉动压力的一种数值预报方法。

The investigation shows that the seasonal fluctuation of infective rate of the two cestodes is similar, but there is difference on their infective intensity Early...

对两种假叶目绦虫季节动态的观察表明两种绦虫的感染率动态具有一定的相似性，但在感染强度动态方面存在一定差异。

The digital simulation of thedynamic processes under step load input and supply oil pressure fluctuation were carried on by MATLAB. Analysis of the dynamic characteristics was done with the changes of the supply pressure, load, structural parameters of spherical hydrostatic bearing and the effective bulk modulus of oil. The conclusions show that structural parameters of the spherical bearing and the effect bulk modulus of oil have significant influence to dynamic characteristics, but the elasticity deformation of interior supporting collet has very small influences on the output response characteristics of the suspension system. The collets deformation can be neglected on the project.

在此基础上，建立了考虑内支撑筒的弹性变形与否时悬浮系统的数学模型，同时，建立了线性化的仿真模型，利用MATLAB对阶跃负载输入和油源压力脉动输入下的系统进行动态过程的数值仿真，结果表明球面副的结构参数，油液的有效体积弹性模数对系统的响应特性有明显的影响，而内支撑筒的弹性变形对悬浮系统的响应特性的影响很小，在工程上可以忽略其弹性变形。

Methods:The frequency-fluctuation structure,visual test of variables of attention and Conners' behavior scale of 29 ADHD children diagnosed by the DSM-Ⅲ-R criteria were compared with those of 29 normal controls.

运用频率竞争涨落图技术、视觉注意力变量测试和Conners父母调查问卷对符合DSM-Ⅲ-R诊断标准的29名ADHD患儿和29名正常儿童进行对照研究。

After analyzing the difference of sedimentary elements, they sum up that sedimentary gravity flows are the couping result of provenance system, slop type and lake level fluctuation and that the evolution and dominant structural framework of the Liaodong lift control the sedimentary character and distribution characteristics of the gravity flows.

通过沉积要素比较分析，提出了上述重力流的发育是物源系统、坡折类型和湖平面变化耦合作用的结果，辽东凸起的形成演化及以其为主导的构造格局决定着重力流的发育特征及分布规律。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷