查询词典 r

In some finiteness conditions, we prove that there exists a natural Abelian group homomorphism from the Grothendieck group of R to the Grothendieck group of A.

在适当的有限性条件下，我们证明了一个从R的Grothendieck群到A的Orothendieck群的自然的阿贝尔群同态。

Molecular iodine has rich strong absorption lines near 532 nm that can provide the absolute references for frequency stabilization. A monolith solid laser was tuned at the spectrum of transition R (56) 32-0 of iodine molecule with new modulation frequency 375 kHz.

使用532 nm单块固体激光器，在375 kHz新的调制频率下，利用调制转移技术，将激光频率调谐到127I2的R(56)32-0跃迁的吸收谱线，并观察到该吸收谱线相应的15条超精细结构分量。

TIAN Wen-sheng（Chaigoubu Teachers School,Zhangjiakou 076150,China）Abstract:Taking account of δr≠0,through the equation of conservation of orbital angular momentum,orbital parameters equations on the mass change are re-deduced.

Ba星系统的星风吸积及污染因子刘俊红和仲池田文生摘要：用整个系统的角动量守恒条件代替切向动量守恒条件，且δr≠0，考虑轨道偏心率的高次项，推导了星风吸积质量及轨道参量变化方程。

A combinational circuit that has three inputs that are an augend, D, an addend, E, and carry digit transferred from another digit place, F, and two outputs that are a sum without carry, T, and a new carry digit, R, and in which the outputs are related to the inputs according to the following table.

一种组合电路，有三个输入端和两个输出端；三个输入端是：被加数d、加数e以及从另一个数位传来的进位数f；两个输出端是：无进位和数t及新的进位数r。电路的输出和输入的关系如下表所示

In the thesis, we use R-Soft program to find the appropriate photonic crystal structure which can replace laser cleaved mirror and provide high reflectivity as high as 71% for 980 nm laser. Furthermore, we replace mirror with air bridge mirror in order to prevent light from escaping below photonic crystal. Then we observe whether it can provide higher reflectivity.

本论文利用R-Soft软体来对二维光子晶体做模拟，找出适当的二维光子晶体排列，能对於波长980 nm雷射提供高的反射率，以使光子晶体能取代一般的雷射的劈裂镜面，制作反射率高达71%的雷射镜面，另外，更进一步将镜面改为空桥式镜面，以避免光从有限深光子晶体下方散逸，来研究是否能提供更高的反射率。

This paper studied the coding algorithms for the R-S UEP Codes based on the algebraic characteristics of the code space.

本文以R-S不等保护码为研究对象，在分析码空间特性的基础上，着重研究编译码算法。

Furthermore, the behaviors of the two contributions to PS of R〓-line are quite different, and it is their algebraic sum that leads to the total results of PS.

在R〓线压致移位中，这两部分贡献的行为很不相同，正是它们的代数和产生了总的压致移位结果。

Characteristics, synthesis and application of R-122 alicyclic epoxy resins in industry, agriculture, transportation and national defense were introduced in this paper.

介绍了R-122脂环族环氧树脂的性质、合成和在工业、农业、交通运输业与国防上的应用。

The curing procedure of bisphenol A cyanate ester resin modified by copolymerization with epoxy E-51 and alicyclic epoxy resin R-122 was studied by differential scanning calorimetry.

采用示差扫描量热法对缩水甘油醚类环氧树脂(E-51)与脂环族环氧树脂(R-122)共同改性的双酚A型氰酸酯树脂的固化反应历程进行了研究。

In order to determine the carbonation interface properly, Alizarin yellow R is chosen as the acid base indicator.

研制了新的具有球形凹面的混凝土试块及相应模具，实现了混凝土碳化试块的非破坏测试；选择了茜素黄R作为酸碱指示剂，合理地确定了检测时的碳化界面。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。