查询词典 DC

It is extensively used for different occasions that require DC power supply, including electrolytic chemistry, transmission, traction, electrostatic precipitation, electroplating and DC transmission etc.

整流变压器是指把电力网的三相正弦交流电压变换为所需要的交流整流电源的电压和相数的电源变压器，它广泛应用于点解化学、传动、牵引、静电除尘、电镀、直流输电等需要提供直流电源的场合。

This paper discusses a method, which can be used to approximately calculate the equivalent resistance and to approximately calculate the efficiency of different topologies. It could benefit a lot in designing DC-DC converters.

本文提出了一种近似计算等效电阻的方法，其原理是将变换器中各元件的损耗之和等效为输出电阻的损耗，可以简便计算变换器的效率，有助于选择合适的电路。

The trace element contents of Eupatorium lindleyanum DC in different parts in different harvest periods and their correlation to their pharmacological activities were analyzed by determining the pH value and trace element contents of Eupatorium lindleyanum DC in planting field.

方法］通过则定了野马追种植大田内土壤的pH值及其微量元素的含量，分析了野马追不同采收期各部位的微量元素含量以及其与药理活性间的相关性。

The question of unbalance on PS PWM DC-DC FB converter is discussed, and the solution is proposed.

介绍了桥式变换器的不平衡问题及解决方法和参数确定。

A stand-alone solar LED lighting system usually consists of a DC/DC converter to convert the floating battery voltage into a constant current to drive the LED.

独型太阳能LED照明系统，於白天时用铅蓄电池，蓄存太阳电池阵所产生之电，并於夜晚点LED灯具。

According to what the writer has known in the market on DC,the change of focal distance is a very important factor in quality of camera ,and which decides the price of the DC.

根据笔者在DC市场上了解，变焦倍数大小是决定数码相机好坏的十分重要的因素，变焦倍数的大小同样决定数码相机的价格，国产相机技术落后，在市场上几乎找不到有光学变焦功能的国产DC。

Compared to the other second-side rectifier, it is concluded that the full-wave Rectifier is well adapted to the Low-voltage High-current DC-DC converter.

论文通过对全波整流输出电路与其他副边整流电路的比较，得出采用全波整流电路特别适合隔离型低压、大电流输出的DC／DC变换器的结论。

Many dendritic projections appeared at the adherent cells gradually observed by light microscope; By scaning electron microscope, typical"veiled"DC appeared with abundance of gauffer and the edge of the veil made of graded dendritic projections; all kinds of DC conjected and composed of cluster by the projections. 2. The percentages of CD markers were CD123/54. 5, CD11c/88. 99, CD40/56. 65, CD1a/69. 36, CD86/92. 57, CD80/70.79, CD83/85. 91. 3. The numbers of T cells expressing CD69 has been increased strikly (CD4+CD69+/19. 05%; CD8+CD69+/21. 93%). 4. The augment of percentages of CD3+, CD25+, CD45RO+/CD45RA+, CD4+/CD28and CD8+/CD28- and the decrease of CD28+ and CD45RO-/CD45RA+ in both the CD4+ and the CD8+ T cells could be exemed.

光镜下见贴壁细胞在培养过程中（7天）逐渐长出长短不一树突状突起，细胞形态不一；电镜观察到DC表面呈多层"面纱"覆盖，有大量皱褶，"面纱"边缘有长短不一的不规则的树突状突起，每个突起有多级分枝；AFM见DC细胞的"面纱"状结构是由多级树突状突起相互缠绕形成的，各个DC细胞之间的突起相互连接，构成集落； 2。

A new universal hybrid topology is brought forward. Two types multilevel inverter: equal DC voltage and DC voltage in geometric proportion is studied, besides this, simulation and experiments on SVPWM applied on cascaded H-bridge inverter is also studied.

提出了多电平逆变器的一种通用组合拓扑结构，针对这种拓扑结构重点，研究了直流侧电压相同及等比变化的两类级联拓扑以及级联H桥逆变器的矢量控制方法；并对级联H桥逆变器的矢量控制方法做了实验研究。

The influence of DC bias current from I=0mA to I=5mA on the GMI effect in the glass-covered wires annealed by 70mA DC current is investigated.

本文还研究了偏置电流对经过70mA直流焦耳处理的Co71.8Fe4.9Nb0.8Si7.5B15玻璃包覆非晶丝巨磁阻抗效应的影响。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。