查询词典 DC

In the dissertation, principles of phase-shifted full-bridge ZVS PWM and push-pull boost converter are analyzed; Reason of duty ratio dropping out and solution measures are introduced at the same time; The magnetic biasing and ZVS methods of Lagging brachium are studied detailedly in the bidirectional DC converters.

在本文中首先分析了移相全桥式ZVS-PWM功率变换和推挽式DC／DC Boost功率变换的工作原理，分析了移相全桥式滞后臂实现零电压关断困难以及占空比丢失的原因以及采取相应的改善措施，分析了双向DC／DC变换器产生偏磁的原因以及采取抗偏磁的措施。

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。

Methods Peripheral blood mononuclear cells from healthy donors were induced to become dendric cells and CIK, using tumor antigen extracted from gastric cancer SGC7901 cells to sensitize DC, antigenpulsed dendritic cells were cocultured with CIK to generate CIK induced by gastric cancer antigenpulsed DC.

从正常人外周血单个核细胞诱导DC、CIK细胞，用胃癌细胞SGC7901抗原致敏DC。致敏DC与CIK共培养，制备经胃癌抗原致敏的DC诱导CIK细胞。

Lipopolysaccharide was added to induce the ES-DC maturation.The matured ES-DC was harvested 24 hours later to identifying with morphology and transmission electron microscopy.The phenotype of matured ES-DC was analyzed by flow cytometry and compared with the immatured ES-DC.

用磷酸脂多糖促进DC的成熟，收获细胞后观察细胞形态及摄片并做扫描电镜检查，分析细胞表型并与不成熟DC细胞表型做对比，异体淋巴细胞增殖实验行功能检测。

Result The cultured DC from mouse bone marrow displayed the typical morphological characteristics of DC. Immature DC, which had high expression in CD11c and low expression in MHCⅡ and CD86, could phagocytize antigen. Mature DC, which had high expression in CD11c, MHCⅡ and CD86, could stimulate allogenic mixed lymphocyte proliferation.

未成熟DC的细胞表型为CD11c、MHCⅡ、CD86，具有极强的抗原吞噬能力；未成熟DC经LPS刺激培养后可转变为成熟DC，细胞表型为CD11c、MHCⅡ、CD86，可显著刺激同种异体混合淋巴细胞增殖。

It is reported, verus platform contains 4 to joy stick, have on enter, begin, regressive, switch on the mobile phone, restart, be in a poor light / close wait for key-press, and portable memory CF gets stuck, can insert equipment to choose miniature hard disk, adapter of the DC power supply that still contains DC 5v, 2.5a additionally, AC-DC and agency equipment, will undertake data-base applies change and making the movie.

据悉，Verus平台带有一个四向把持杆，上有进入、起头、退却退却、开机、重启、背光开/关等按键，以及可挪动存储CF卡，并可拔出备选微型硬盘，此外还带有DC 5v 、2.5a的DC电源、AC-DC适配器以及前言行动措施等，来进行转化和生成片子资料库应用。

In particular, it is found that the output ripple voltage of boost and buck DC-DC converters are related to the duty ratio of input pulse.

本文提出了开关DC-DC变换器的线性空间建模法，并将其成功地用于升压型和降压型DC-DC变换器的分析，首次导出了上述两类变换器的输出纹波表达式，特别是输出纹波与控制脉冲占空比之间的关系。

A new modeling method for DC-DC power coverter is proposed in chapter 3, and it is applied to the analysis of output ripple voltage of boost and buck DC-DC converters.

本文提出了开关DC-DC变换器的线性空间建模法，并将其成功地用于升压型和降压型DC-DC变换器的分析，首次导出了上述两类变换器的输出纹波表达式，特。。。

Was founded in 1998, the main distribution line agents and flake-like electronic components, has Huake, thick sound, YAGEO resistance, Howard Branch, YAGEO, Samsung, TDK's capacitor, the United States AVX and KEMET, Japan NEC tantalum capacitor, NEC, PHILIPS, MOTOROLA, long electric brand b / triode, ST and ROHM's regulator tube, TOREX, Pui Ling, Li Qi, Jing-fu, Taiwan's power supply LDO regulator IC, DC / DC step-up IC, DC / DC step-down IC, TDK, too enticed, Fenghua inductor, bead, Panasonic adjustable capacitance, an adjustable resistor, three-ying Korea and Japan's Sanyo electrolytic capacitors, and insurance management, light-emitting diodes, thermistors, varistors, the brand of integrated circuits and so on; are a professional supporting electronic components for over many years of experience supporting services.

深圳金星电子科技有限公司成立于1998年，主要代理经销直插式和片状式的电子元器件，有华科、厚声、YAGEO的电阻，华科、YAGEO、三星、TDK的电容，美国AVX和KEMET、日本NEC的钽电容， NEC 、PHILIPS、MOTOROLA、长电品牌的二/三极管，ST和ROHM的稳压管，TOREX、贝岭、立奇、富晶、台湾的LDO电源稳压IC、DC/DC升压IC，DC/DC降压IC，TDK、太诱、风华的电感、磁珠，松下的可调电容、可调电阻，韩国三莹和日本三洋的电解电容，及保险管、发光二极管、热敏电阻、压敏电阻、各国品牌集成电路等等；是一家专业的电子元器件配套商，已有多年的配套服务经验。

By using synchronous rectifier, a higher efficiency low-voltage output DC/DC converter module can be achieved. This paper presents a kind of synchronous rectification DC/DC converter, which includes active clamp circuit, insulating transformer, and current double synchronous rectifier.

为提高低输出电压的DC/DC变换器的效率，提出了一种倍流同步整流有源箝位DC/DC变换器，电路拓扑主要包括有源箝位电路、隔离变压器和倍流同步整流电路。

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。