查询词典 DC

A design method of multiple output power supply with UPS function is presented.

介绍了一种带有UPS功能的多路输出电源的设计方法，该电源第一级为AC/DC电源，并带有蓄电池负载。

Bioactivities of 9 herbicides and 7 admixtures against pink woodsorrel Oxalis corymbosa DC.

对9种除草剂和7个复方进行了系统的筛选测定。

Henson was born in Washington, DC, and attended Oxon Hill High School in Oxon Hill, MD.

汉森出生于华盛顿，并出席Oxon山高中Oxon希尔，医学博士。

The National Cherry Blossom Festival is a spring celebration in Washington, DC commemorating the March 27, 1912, gift to the city of Japanese cherry trees from Mayor Yukio Ozaki of Tokyo.

美国华盛顿特区春天樱花节是为纪念1912年三月27日日本东京Yukio Ozaki市长捐赠3000棵棵樱树来提高美国和日本人民的友谊。

The aim of this research is to useDC link parallel resonance three---phase soft---switching techniqueto realize in inverter.

本研究课题的目标是三相软开关变频器DC直流环节的并联谐振，实现逆变桥上每个功率开关器件以零电压方式开通，达到软开关的目的。

In their study, the researchers connected the battery pack and ultracapacitor bank in parallel to the DC link with bi-directional two quadrant buck-boost converters.

在他们的研究中，研究人员连接电池和超级电容器银行在平行直流环节双向两个象限降压升压转换器。

This paper puts forward a novel DC link parallel resonant soft switching technology. It mainly analyses the topology, working principle of the soft switching inverter. Finally it validates its theory and feasibility through experiment.

该文提出一种新型的直流环节并联谐振软开关技术，重点分析了此种软开关逆变器的拓扑结构、工作原理和特点，并通过实验验证了其原理和可行性。

The ways of parallel resonant DC link and three-level control strategy were used in this power amplifier circuit. Output current ripple of power amplifier can be reduced as three-level power amplifier, all of power switches work on and off under the zero voltage switching or zero current switching, loss of switching and current ripple interference effectively reduced.

该电路在功率放大器三电平控制策略的基础上应用了并联谐振直流环节，保持了三电平功率放大器输出电流纹波小的优点，同时功率器件均工作在零电压或零电流条件下，开关损耗、电流纹波干扰有效地减小。

The phase switches of the proposed SRM converter turn on in zero voltage switchingmode by making use of a kind of parallel quasi resonant DC link circuit,and turn off in ZVS mode by adding a shunt-wound capacitance to every phase switch.

电路采用并联型准谐振直流环节为SRM相开关开通提供零电压条件，给相开关并联电容器则保证了相开关的零电压关断。

Stability and control strategy for parallel operation of AC and DC transmission systems.

交直流混合系统电压稳定性分析的研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷