查询词典 DC

In this study, the CPE processes of four different kinds of polyaromatic hydrocarbons, acenaphthene, anthracene, phenanthrene and pyrene, with two kinds of silicone surfactants, DC-193 and DC-190, were studied separately, and four different assisting methods for the phase separation of the CPE process including heating at a higher temperature, adding salts, centrifugation and stirring were introduced, respectively.

今利用两种聚醚型有机硅表面活性剂DC-193和DC-190，对蒽、菲、芘和苊四种多环芳烃进行浊点萃取研究，分别使用加热、加盐、离心和搅拌等辅助方法改变相分离过程的速度。通过测定表面活性剂富集相的体积百分率Vs/随时间的变化和最终的萃取率，研究上述四种不同辅助方法对相分离行为和萃取性能的影响。

An analysis method of DC / DC converting circuit based on state averaging method is presented with its principle and application.

提出了一种分析DC/DC变换电路分析方法。对该分析方法的原理和具体运用进行了详细说明。

A new bi -directional DC/DC converter is presented.

提出了一种新颖的双向DC/DC 变换器。

In chapter one, the application and background of bidirectional DC/DC converter is introduced.

第一章介绍了双向DC/DC变换器的研究背景和应用。

Some kinds of bidirectional DC/DC converter are introduced.

回顾了各种双向DC/DC变换器的发展并对其进行了总结。

Methods Granulocyte/macrophage colony stimulating factors and interleukin 4 were used to cultivate DC from peripheral blood of hepatocellular carcinoma patients.Tumor associated antigen extracted from human liver cancer HepG2 cell line was used to activate the DC,which will initiate homogenic T lymphocyte to form cytotoxic T lymphocyte.HepG2 cells were transplanted to the nude mice and were treated with CTL.Expression of PCNA in tumor cells was evaluated.

联合应用粒/巨细胞集落刺激因子及白介素-4(IL-4)直接从肝癌患者外周血中培养出DC；以源于人肝癌细胞系HepG2细胞的肿瘤抗原粗提物刺激DC；DC激活同源的T淋巴细胞产生细胞毒性T淋巴细胞；建立人肝癌细胞系HepG2裸鼠移植瘤模型；CTL治疗人肝癌细胞系HepG2裸鼠移植瘤；检测移植瘤标本肿瘤细胞PCNA表达水平。

A few nonadherent cells in the culture system couldn't interfere in the generation of DC. The structure of"veil"of DC made of graded dendritic projections twiested enlarged the area of membrane and became the foundation of structure to capture antigens.

四、结论： 1。该方法可以诱导出的成熟DC细胞，形态典型，而且少量悬浮细胞不影响DC细胞的分化和成熟；&面纱&状结构是由多级树突状突起相互缠绕形成，扩大了DC细胞的膜结构，是有效捕获抗原的结构基础； 2。

In the paper the author disagrees to introduce DB in China and compares the advantages and disadvantages of both DB and DC plan, and discusses lessons of DB pension plans in Anglo-American economies, DC scheme's trend in the world and its comparative advantages for the competitiveness of Chinese enterprises, effects of DB and DC on economic outcome and social development, and development paths in countries with different juristic systems. Finally, this paper suggests measures for recompensing the older employees of their rights in occupational pension.

文章对DC和DB两个模式进行了优劣比较，分析了英美DB型企业年金模式的沉痛教训，论述了DC型的优势和发展潮流及其对中国提升企业竞争力的利处，以及它们各自对经济结果和社会发展的不同影响，阐述了不同国家继受不同法系导致的不同发展道路和中国发展企业年金应该努力的制度方向，进而分析了中国公共政策的制定过程中的博弈问题；提出了补偿老年职工企业年金权益的设想和具体办法。

Based on solidification theory and analysis of process of Aluminum alloy Direct Chill casting, the control system of DC casting for big size billet has been designed. For improving the quality of billet-optimized control strategy of cooling water must be determined to eliminate the instability of the traditional feedforward control, PID control and cascade control have been introduced.

通过对铝合金DC铸造工艺过程的分析，建立了铝合金DC铸造的控制系统；在分析DC铸造铸锭结晶凝固原理的基础上，完成了冷却水量自动控制的系统设计，并进行了控制策略的选择；基于对铝合金直接水冷铸造，DC凝固原理和工艺过程的分析，本文提出了大尺寸铝合金圆锭铸造的控制系统设计方案。

Dendritic cells are the most potent antigen-presenting cells in human immune system. Our institute has been working on the region of DC development and DC-mediated immune therapy on cancers for a long time. A cDNA library of human dendritic cells has been set up and by large-scared random sequencing, we have isolated a lot of novel fulllength cDNA clones.

树突状细胞(Dendritic cells，DC)是人体内重要的抗原提呈细胞，本研究所对DC的分化发育及其介导的肿瘤免疫治疗的研究工作已进行多年，并在此基础上建立了人树突状细胞基因文库，通过大规模随机测序的方法开展了从DC中克隆新分子的工作，从2万余条EST中发现了许多新的分子。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。