查询词典 coordinate conversion

Taking frequency conversion of semiconductor transistor as an example, the basic principles and some problems related are introduced in the article, integrating emitter-injected frequency conversion circuit of transistor, which is often used in superheterodyne to discuss about it.

分析了变频的基本原理和设计变频器的有关注意问题；从三极管输入回路和输出回路的信号入手，讨论了超外差式收音机常用的变频电路的工作原理。

The paper sums up diverse conversion system, and puts forward a all-purpose algorithm that adapts to from binary system to decimal system, Which may computes the same example through using different conversion system and different precision, till the satisfactory uncoil is obtained.

5本文通过对不同进制的换算关系的归纳，总结了一个二进制至十进制的通用算法，可以对同一个例题，用不同进制和不同精度进行反复试算，直至得到满意的结果。

From the modeling experiences of CTD service with Petri nets, universal coupling criteria of Petri nets model of protocol conversion are abstracted, which enrich the protocol conversion methodology.

在用Petri网对CTD业务的建模过程中提炼出通用的Petri网模型协议转换耦合原则，丰富了协议转换方法学的内容。

The activity test shows that the Ni/Ce-Zr-Al-Ox catalyst has a CH4 conversion of 89％ and a good stability, and the CH4 conversion increases to 94％ by adding 3.2％ steam. In addition, due to the suppression to unreactive carbon, it can be expected that the stability of catalyst will be further promoted.

活性测试结果表明， Ni/C-Zr-Al-Ox催化剂显示了89％的CH4转化率和良好的稳定性，添加3.2％的水蒸汽后活性提高到94％，由于对非活性积碳的抑制，可以预料其稳定性也将进一步提高。

There are several tools and conversion utilities that can be used to do the media format conversion.

有几个工具和转换工具，可以用来做媒体格式转换。

Contrapose the Big power high voltage frequency conversion equipment broad use on big power wind pump speed conversion economize ,the article explain forecast of regulate speed achieve economize power of fire active calcareousness for steel making in big rotative kiln ,and practice use in steel factory.

针对于大功率高压变频器在大功率风机调速节能上广泛的应用，本文介绍了烧制炼钢用活性灰的大型回转窑用引风机变频调速改造的节能预测和在钢厂在的实际应用。

Spatial conversion: The spatial conversion mostly occurred between cultivated land and settlements.Additionally, the increase of land for urban construction includes rural settlements which assimilated by urban expansion.The fraction of xerophilous grassland increase mainly converted from un\|irrigated cropland, shrub forest mainly converted to xerophilous grassland, and bottom land mainly converted to water body.

3空间转换：以农田和聚落之间的转换为主，另外城镇建设用地的增加包括其扩展融入的农村聚落等；典型草地的增加主要来自旱地；灌丛减少主要是转变成典型草地，其次是转变成灌丛草地；河湖滩地减少主要是变为内陆水体，再是转变成水浇地。

In this thesis, we introduce RF transceiver architectures for the wireless communication system and some parameters of the down-conversion mixer. By means of the noise model of RF-CMOS mixers presented by ABIDI in 2000, circuit designers will know how the noise appears at the output of a CMOS down-conversion mixer.

本篇论文介绍了无线通讯系统中常用的射频接收机系统架构及混频器的参数介绍外，并藉由ABIDI於2000年所提出CMOS混频器之杂讯模型，透过此模型将使电路设计者更清楚的了解到杂讯源将经由何种过程出现在混频器的输出端。

On yellow, instead of the oligmer and conversion with a given yellow, so it should be addicts'choice achromatous of oligmer and confecting conversion to finish.

上光油的发黄，与其所用的齐聚物和活性稀释剂带有一定黄色有关，因此应选用无色的齐聚物和活性稀释剂来配制上光油。

Comparing with the activity of NiO/γ-Al_2O_3, NiO/TiO_2, and NiO/CeO_2catalysts, NiO/CeO_2 showed the highest light-off conversions of NO and CO and lowesttemperature of total conversion. Three kind of CeO_2 prepared by homogeneousprecipitation, precipitation, and direct decomposition method wereused as the carrier of NiO. Through the activity comparison of NiO/CeO_2, NiO/CeO_2and NiO/CeO_2, CeO_2 optimized as the preferable carrier for active component at aspace velocity of 120 000h~(-1, the coversion of NO is 50％at 170℃over NiO/CeO_2catalyst, and the complete conversion of NO and CO occurred at 210℃.

由Al_2O_3、TiO_2、CeO_2负载的NiO催化剂在NO-CO反应中的活性比较得出：NiO／CeO_2催化剂具有最好催化活性；分别采用直接分解法、氨水沉淀法和均匀沉淀法制备了载体CeO_2、CeO_2、CeO_2，并比较了NiO／CeO_2、NiO／CeO_2、NiO／CeO_2的活性差异，得出了以尿素作为沉淀剂的均匀沉淀法制备的CeO_2负载的NiO活性最好空速为120 000 h~(-1的条件下，170℃时，NO的转化率为50％；210℃时，NO和CO的转化率均达到了100％。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&