查询词典 ac

The EAG responses of the male black cutworm moth, Agrotis ypsilon to standard chemicals of sex pheromone, i.e., Z7-12: Ac, Z9-14: Ac, Z11-16: Ac, Z5-10: Ac and Z8-12: Ac, were measured.

利用触角电位记录技术，测定了小地老虎Agrotis ypsilon雄蛾对性信息素标准化合物Z7-12：Ac、Z9-14：Ac、Z11-16：Ac、Z5-10：Ac和Z8-12：Ac的EAG反应。

After analysis of multiple sequences alignment, phylogenetic tree and similarity of sequences, it was shown that Ac-ASP has similar relation with Am-ASP, and shared high homology with other Hymenopteran and Coleopteran. From above analysis, we firmly suggest Ac-ASP1 and Ac-ASP2 belong to OBPs family and Ac-ASP3 belong to CSPs family.

通过多序列联配、系统发育树及序列相似性分析，Ac-ASP除与西方蜜蜂Am-ASP亲缘关系较近(相似性达到80％以上)外，与其它膜翅目以及鞘翅目的OBPs及CSPs也有一定的亲缘关系(相似性达到30～60％)，且Ac-ASP1和Ac-ASP2应为OBPs，Ac-ASP3则应为CSPs； 4。

This thesis calculates emphases the excitor circult of AC excitor .but the calculate of excitor circult must solve two problem: how to caculate the output AC phasic potential, phasic electric current and the capacity of AC excitor basing on the main generator direct current excitating voltage and direct current excitation current ;how to caculate the armature feedback, power factor and required ampere-turn of AC exciter.

本文重点对交流励磁机的磁路进行计算，但磁路计算先要解决两个问题：如何根据主发电机给定的直流励磁电压和直流励磁电流计算出交流励磁机的输出交流相电势，相电流及交流励磁机容量；如何计算交流励磁机的电枢反应，功率因数及其所需的安匝数。

Then introduce the principle of work and the construction characteristic. This thesis calculates emphases the excitor circult of AC excitor .but the calculate of excitor circult must solve two problem: how to caculate the output AC phasic potential, phasic electric current and the capacity of AC excitor basing on the main generator direct current excitating voltage and direct current excitation current ;how to caculate the armature feedback, power factor and required ampere-turn of AC exciter.

本文重点对交流励磁机的磁路进行计算，但磁路计算先要解决两个问题：如何根据主发电机给定的直流励磁电压和直流励磁电流计算出交流励磁机的输出交流相电势，相电流及交流励磁机容量；如何计算交流励磁机的电枢反应，功率因数及其所需的安匝数。

This article first on to the topic background, the topic object basic survey and the topic research goal has given brief showing, then has made a detailed elaboration to the AC-DC-AC inversion principle of work, emphatically has analyzed based on the AC-DC-AC inversion control principle as well as the SPWM profile several productions method.

本文首先就对课题的背景，课题对象的基本概况以及课题研究的目的做了简要的说明，然后对AC-DC-AC逆变器的工作原理做了一个详细阐述，着重分析了基于AC-DC-AC逆变器的控制原理以及SPWM波形的几种生成方法。

By studying the growing situation of AC arc along the simple plane model and measuring of AC arc performance using electrical probe, we obtained the requirement of AC arc to develop along a polluted surface under various pressures and a method to calculate the AC pollution flashover voltage.

通过对沿简单平板染污模型交流电弧发展情况的研究，用探针对交流电弧特性进行了测量，提出了交流电弧的发展条件和一种计算交流污闪电压的方法，得出简单模型交流污闪电压随气压下降而降低的主要原因是由于低气压下所要求的交流电弧发展条件降低。

according to the users′ actually demand for uninterruptible power supply for loads,the internal structure of digital generator is analysed and the reason for its uninterruptible function can′t be achieved.a design of the uninterrupted power supply system which transformed from the digital generator is proposed.the system uses the inverter of generators,ac through inverter for loads,at the same time,charges the battery as ac is normal.inverter the battery dc converters to ac for load,meanwhile,starting generator,when power failure.the system applies uninterruptible power for load,whether the ac is normal or abnormal,and design voltage and frequency stabilization,output zero-interrupted,battery charging and discharging management.without requiring purchase an uninterruptible power supply separately,this design can avoid duplication of investment and wasting of resources.

快速安全提高汽轮发电机转子检修质量。。。摘要：针对用户对负载供电不间断的实际需求，分析了数码发电机的内部结构及其不能实现供电的不间断性能的原因，提出一种由数码发电机改造组成的交流不间断供电系统的设计方法。该设计利用发电机内部的逆变器，在市电正常时，由市电经过逆变器给负载供电，同时给蓄电池充电；在市电断电时，一边启动发电机，一边由蓄电池的直流电通过逆变器转换成交流电供负载使用，实现无论市电正常还是异常，系统对负载提供不间断电源。设计对市电进行稳压、稳频、输出零切换、蓄电池的充放电管理等新功能。此设计无需单独购买不间断电源，避免重复投资和资源浪费。

Their name, geographic location are as follows: Station name of the host country Mizusawa latitude, longitude -141 ° 07'5139 ° 08'3602 Japan AAC kitab -66 ° 52'511850 Russia AC Kaluofute -8 ° 18'448941 Italy AC Gaithersburg 7 ° 1'5713202 the United States AC ukiah 128 ° 12'3512096 the United States AC stations were a uniform Zeiss Zenith device, according to a unified observed star table, observing the outline for continuous observation of latitude, from the Central Bureau of centrally ILS calculations solved polar coordinates, published and made available to the use of units of .1962 began restructuring for the international polar wander service.

它们的名称、地理位置分别为：站名经度纬度所在国水泽－141°07′5139°08′3602日本AAC基塔布－66°52′511850俄国AC卡洛福特－8°18′448941意大利AC盖瑟斯堡＋7°1′5713202美国AC尤凯亚＋128°12′3512096美国AC各台站用统一的蔡司天顶仪、按统一的观测星表、观测纲要进行连续地观测纬度，由ILS中央局统一处理计算，解出地极坐标值，发表并提供给使用单位。1962年开始改组为国际极移服务。

Products have: NB-KR series, NBC series of carbon dioxide gas shielded welder, LGK8 Series air plasma arc cutting machine, WS Series DC argon arc welding machine, WS series IGBT inverter DC argon arc welding machine, WSE Series AC-DC pulse argon arc welding machine, ZX5 Series Thyristor rectifier arc welder, ZX6 series three-phase rectifier arc welder, ZX7 series IGBT inverter DC arc welding machine, ZXG Series rectifier arc welder, ZXE1 Series AC-DC dual-use arc welding machine, BX1 Series, BX3 series, BX6 Series AC arc welding machine, steel electroslag welding stress, pedal-style capacitor discharge spot welder, UN series of welding machine, DN Series AC Spot Welder foot, DNY Series mobile communicate spot welder, DN2 fixed pneumatic spot welding machine, D N2 fixed aerodynamic point of convex welder, CG series gas cutting machine, CNC cutting machine door, Intersection CNC EDM Series , flame brazing machine series, automatic welding machine series, MZ series automatic submerged arc welding machine, automobile manufacturing special welding equipment, robot applications, such as large family of more than 29 varieties.

生产的产品有：NB-KR系列、NBC系列二氧化碳气体保护焊机，LGK8系列空气等离子弧切割机，WS系列直流氩弧焊机，WS系列IGBT逆变直流氩弧焊机，WSE系列交直流脉冲氩弧焊机，ZX5系列晶闸管整流弧焊机，ZX6系列三相整流弧焊机，ZX7系列IGBT逆变直流弧焊机，ZXG系列硅整流弧焊机，ZXE1系列交直流两用弧焊机，BX1系列、BX3系列、BX6系列交流弧焊机，钢筋电渣压力焊机，脚踏式电容储能点焊机，UN系列对焊机，DN系列脚踏式交流点焊机，DNY系列移动式交流点焊机，DN2固定式气动点焊机，DN2固定式气动点凸焊机，CG系列气割机，门式数控切割机，数控相贯线切割机系列，火焰钎焊机系列，全自动堆焊机系列，MZ系列自动埋弧焊机，汽车制造专用焊接设备，机器人应用系统等二十九大系列百余个品种。

CJX2－d Series AC contactor is mainly used in the ciruit AC 50HZ (or-60HZ),rated insulating voltage is 380V unde AC-3 usage it can be combined with suitable thermal overload equipment into a electromagnetic starter to protect the circuit that may appear overload The comactor can be equipped with builbing block style auxiliary con tact group、air delaying contact、Interlonking mechanism and so on ac cessories to combined into time relay、reversible comtactor and star-delta starter.

CJX2-d系列交流接触器主要用于交流50HZ（或60Hz，额定绝缘电压为660V，在AC-3使用类别下额定工作电压为380V时额定工作电流至95A的电器中，供远距离接通和分断电器，并可与适当的热过载电器组成电磁起动器以保护可能发生过载负荷的电路。接触器可组装积木式辅助触头组、空气延时头、联锁机构等附件；组成延时继电器、可逆接触器、星三角起动器。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？