查询词典 aperture ratio

Based on the relation between the attenuation ratio and the transmittance of the laser, the variation of the attenuation of 10.6μm laser traveling in advection fog or radiation fog with the visibility and the FOV of the laser receiver is given.

最后，以工作波长为10.6μm的激光为例，利用衰减率与透过率之间的关系，给出了平流雾及辐射雾中激光雾衰减随能见度、接收器视场角等的变化关系。

The better labeling conditions are as follows:dry acetonitrile as solvent, the mole ratio of K/222 to K 2CO 3 is 1∶1, reaction time is 5 min at 80 ℃. The radiochemical yield is about 57% which is about 3 times higher than the published data.

得出较佳标记条件：以无水乙腈为溶剂，K/ 2 2 2与K2 CO3 摩尔比为1，80℃下反应 5min ，标记率为 5 7%，比文献值提高了 3倍以上。

Many factors affecting the radiochemical synthesis of 18 F SFMB including reaction solvents, temperature, the mole ratio of K/222 to K 2CO 3 and reaction time are studied.

探讨了反应溶剂、温度、K/ 2 2 2与K2 CO3 的摩尔比及反应时间等诸因素对18F SFMB放化合成的影响。

The main two cycles of the Xiangshan volcanic rocks and subsequent subvolcanic rocks have low ε〓 value (-7.46～-9.40), high initial 〓Sr/〓Sr ratio (0.70801～0.71201), old Nd model ages (1.54～1.70Ga) and relatively riched in radiogenic Pb.

相山两旋回火山岩及火山期后的次火山岩具有较低的ε〓值(-7.46～-9.40)、较高的I〓值(0.70801～0.71201)和较古老的Nd模式年龄(1.54～1.70Ga)，且相对富集放射成因铅。

In this paper, based on the comparison between CMOS and CCD image sensor and according to the principles of photometry and radiometry, the imaging range formula of CMOS image sensor in space-based system for space targets is derived with detail analysis, considering the metric of Signal-to-Noise Ratio and taking deep space as background.

在对CMOS和CCD传感器进行对比的基础上，从信噪比的角度出发，以深空作为背景，根据光度学和辐射度学的基本原理，对基于CMOS图像传感器的天基空间目标监测系统的成像距离进行了详细分析和公式推导，并以STAR-1000 CMOS图像传感器为例验证了理论模型和计算公式的正确性，最后对进一步提高CMOS图像传感器成像距离的方法进行了简要分析。

At last , some investgation is made to change about elementary constant of the universe in today ,which demonstrates that elementary constant of the universe in today would change at a ratio of 2.3387723548904887*1050 per year which means that elementary constant of the universe in today would remain as an constant unchanged within one million years if its accuracy fix on the 4th digit after radix point of 7.7577806787995708*1060 As a reminder , both elementary constant of the unvierse elementary constant of the unvierse in today have nothing to do with the cosmic constant introduced by Mr.

基本宇宙常数是一个变化的物理常数，其数值变化的速率为：2.3387723548904887*1050 ，与今天基本宇宙常数7.7577806787995708*1060 相比较，如果在保持今天宇宙常数的数量级不变的情况下将精确度选定在小数点后第4位，那么今天基本宇宙常数将在100万年之内保持不变。

The results showed that lower concentrations of ethanol-water, higher temperature, longer time, larger cottonseed-meal/solvent ratio comduce to increasing raffinose leaching yield.

结果表明，低浓度的乙醇水溶液、较高的温度、较长的浸出时间、较大的料液比有利于棉籽糖的浸出。

The leaching rate of raffinose were investigated under different ethanol concentrations in ethanol-water solution, leaching temperature, extraction time and cottonseed-meal/sovent ratio.

分别考察了不同浓度的乙醇水溶液、浸取温度、浸出时间和料液比的操作工艺条件对棉籽糖浸取率的影响。

Compared with classical methods,the main advantage is as follows:raffinose oxidation time may be shortened within 60min;oxidation of hemoglobin can be controlled when the reaction temperature is 20℃;the proportion of MetHb can be controlled less than 5%;the ratio of raffinose to hemoglobin and the final concentration were dependent on the average molecular weight of HBOCs;at the same time,we can obtain HBOCs of different molecular weights.

与经典的方法相比，其主要优点为：高碘酸钠氧化棉籽糖的时间可缩短至60min即可达到完全氧化：在20℃时，便可控制血红蛋白的氧化，可将MetHb含量控制在5%以内；棉籽糖与血红蛋白的比例和血红蛋白的反应终浓度可根据所需要的目的聚合血红蛋白的平均分子量的大小来定；同时调整反应体系可以得到不同分子量大小的HBOCs。

Through over-all stability analysis, the influence of height-span ratio, rafter slope to the stability and the effective factors of gable portal frames are also presented in this paper.

通过对门式刚架的整体稳定分析，研究了刚架的高跨比、斜梁坡度对结构的稳定和计算长度系数的影响。

Summary In copyright infringement cases,if the alleged infringer uses or even plagiarizes the copyrighted works or parts thereof,which causes no substantially adverse effect on the normal exploitation of the work,nor does it inflict any substantial damages to the right owner,the de minis doctrine should be applied to exempt the liabilities of the defendant and seek the balance of interests between the right owner and the general public embodied by the copyright law.

在侵犯著作权案件中，如果被控侵权行为人虽未经著作权人的同意，使用甚至抄袭了受著作权保护的作品或作品的片段，但若情节轻微，未对该作品的正常使用产生任何实质不利的影响，亦未对权利人的权利造成实质性的损害，则应适用&不计琐细原则&，免除行为人的责任，以寻求在权利人利益与著作权法所体现的社会公共利益之间的平衡。

This new product will become our best seller.

这个新产品会成为我们最畅销的产品。