查询词典 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。

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。

As a DC/DC basic structure is adopted, the operational amplifier leads the non inverting input end voltage of the error amplifier to follow the input voltage linearly, thus realizing the linear following relation between the output voltage and the input voltage.

由于采用DC/DC的基础结构，增加运算放大器使误差放大器的同相输入端电压与输入电压线性跟随，从而实现输出电压与输入电压的线性跟随关系。

The invention discloses a DC/DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier.

本发明公开了一种DC/DC电路，包括PWM控制器、电流放大器、峰值电流比较器、误差放大器、主开关和同步开关；还增设运算放大器，其同相输入端用于与输入电压或基准电压耦合，或用于同时与输入电压和基准电压耦合；其反相输入端用于与基准电压或地耦合，其输出端与所述误差放大器的同相输入端连接。

An introduction for forward topology multiple output DC/DC converter is made. A brief introduction was made to the two secondary side control technique, using magnetic amplifier and secondary side PWM regulator. And the differences between the two methods are compared.

摘 要：介绍了正激式DC/DC多路输出电源拓扑，简单介绍了两种精确调节技术：利用磁放大器进行后级调节和次级同步调节技术实现精确输出，并比较了其各自的优缺点。

DC-DC switching converter is a time-variant and non-linear dynamic system, and it is difficult to analyze and design.

DC-DC开关变换电路是一个时变的、非线性的动态系统，它的分析与设计一直是一个难题。

On the basis of the current situation and developing trend of modeling methods of DC-DC switching converters discussed, a circuit averaging method is put forward to model nonideal basic converters operating in the continuous conduction mode.

在对 DC-DC 开关变换器建模方法的现状及发展趋势进行深入分析的基础上，提出了一种非理想基本变换器在连续工作模式下的电路平均建模方法。

Sometimes it is difficult to predict and calculate the periodic orbit, so the chaotic control technology based on Washout filter is used to control chaotic phenomena of DC/DC converter.

针对上述不足，本文采用了Washout滤波器来控制DC/DC变换器中的混沌现象，仿真结果证明了该方法的有效性。

DC takes up antigen through phagocytosis, pinocytosis, and endocytosis via different groups of receptor families, such as C-type lectin receptors for antigen capture and presentation, Toll-like receptors for pathogen recognition and DC activation.

DC通过不同的受体吞饮、吞噬和胞吞抗原，例如C型凝集素受体捕获和呈递抗原，通过Ton样受体识别病原体和激活DC。

Methods 30 BALB/c mice were randomly divided into three groups, normal control group, 100, 200 mg/kg APS intraperitoneal injection groups. After one week, weight the mouse spleen, account the splenetic index. Collect the mouse bone marrow cell, induced and cultured with rmGM-CSF and rmIL-4. With inverted microscope to investigate the morphous of DC cell. The phenotypes of DC were detected by flow cytometry and the expression of the GM-CSF protein in serum was tested by ELISA.

分别设对照组及APS 100、200 mg/kg 剂量组，腹腔注射，体内诱导小鼠髓源性DC前体和未成熟DC，称量脾重，ELISA检测血清中GM-CSF表达量，倒置显微镜观察细胞生长状态，电镜检测细胞形态，流式细胞仪检测CD11c、MHC-Ⅱ类分子及协同刺激分子CD80、CD86表达水平。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。