查询词典 ratio of magnification

The invention provides a zoom lens capable of achieving a half angle of view over 38 degrees at the wide-angle end, a magnification ratio 6.5 to 10 or more, and a resolving power corresponding to an imaging element of 5 to 8 million pixels, with a configuration of as few as 10 to 11 pieces of lenses.

本发明提供一种变焦透镜，该变焦透镜能够获得在广角端处大于38度的半视角，6.5至10或更大的放大率，以及对应于5-8百万像素的成像元件的分辨率，具有少至10至11个透镜的结构。

Zoom range and a maximum magnification ratio of 1:3.9, making it ideal for close-up photography.

变焦范围和最大放大倍率1：3.9，因此非常适合近距离拍摄。

This paper puts forward the derivation of precise calculating formula used to determine the magnification ratio of voltage, input resistance and output resistance in amplifying circuits based on the feedback circuit model with parallel voltage.

在建立电流并联反馈电路模型的基础上，推导出放大电路中的电压放大倍数、输入电阻、输出电阻的精确计算公式。

Not only has the total turnover in April this year, a record since the implementation of the "non-reduction of the size of the new regulation," since a new high, at the same time, the bulk of this month's daily average trading volume is a breakthrough 4401.32 million shares, 1118.7 million shares in October than the daily average Turnover ratio of 2.93 times magnification, reaching record highs.

不仅在4月的总营业额今年创纪录自"执行非对新规规模的缩小，"因为新高，同时，本月的日均交易量的大部分是一项突破性的4401320000股，一十一万一千八百七十点〇〇万股比每天2.93倍的放大倍率的平均营业额比10月份，创出历史新高。

precise calculating formula is derivated to determine magnification ratio of voltage,input resistance and output resistance in amplifying circuits based on th feedback circuit model with cascade voltage.with th new calculating methods put forward by the author,it is possible to solve the problems in terms of calculation in amplifying circuits,the key problem being low level of exactness.the research shows the influence of components′ parameters of basic amplifying circuits and feedback circuits on feedback amplifying circuits.the results of the research may contribute to design amplifying circuits and electronic instrument with higher performance,due to the simpler calculation in the design of feedback circuit with cascade voltage.

摘 要：在建立电压串联反馈电路模型基础上，推导出放大电路中的电压放大倍数、输入电阻、输出电阻的精确计算公式。提出新的计算方法，从而解决了放大电路计算不方便，精确度不高、准确性不够的问题。同时进一步揭示了基本放大电路、反馈电路元件参数对反馈放大电路的影响关系。为设计出高性能放大电路及电子设备指明了方向，更加方便于电压串联反馈电路的计算。

Based on the above theories, some vibration characteristics of longitudinal acoustic horns are analyzed with finite element analysis software ANSYS. Some factors influence to large end amplitude distribution is studied such as big end diameter, length of horn, and diameter ratio of big end to small one. In addition, we carry on analysis and research to resonance frequency of large cross-section acoustic horn, amplitude magnification factor, wave node position of horn, transverse vibration situation and so on, and some related change rules are obtained.

在此基础上，通过有限元分析软件ANSYS对纵向超声变幅杆进行了振动特性分析，研究了变幅杆的大端直径、变幅杆长度、大小端面直径比对大端面振幅分布的影响，并对大截面变幅杆的谐振频率、振幅放大系数、变幅杆的波节点位置，横向振动分布等进行了分析研究，总结了相关的变化规律。

Using natural frequency ratio and damping ratio as design variables, constructing an objective function with the peak values of dynamic magnification factor and the dynamic magnification area of the main system in the whole frequency band, the optimization problem is built.

建立了以固有频率比和阻尼比为设计变量，以振幅动力放大系数函数的多个峰值和整个宽频带下面积构造目标函数的优化问题。给出了两个自由度减振器参数的优化计算实例。

The optical trade offs compared to the SE are reduced eye relief from the shorter focal length eyepiece needed to produce the same magnification and higher levels of chromatic and spherical aberrations from the lower focal ratio objective (which may or may not actually be visible at 8X).

我的意中人是个绝色美女，我相信总有一天她会骑着喷火的恐龙来嫁给我的，可是我只看见了她的座骑，却没有看见它的主人

The optical trade offs compared to the SE are reduced eye relief from the shorter focal length eyepiece needed to produce the same magnification and higher levels of chromatic and spherical aberrations from the lower focal ratio objective (which may or may not actually be visible at 8X).

SE物镜焦距较长，E和E II为了紧凑而使用较短的焦距，但是就要有所牺牲。因为相同倍数需要用更短焦距的目镜，所以出瞳距离短了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。