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dcdc
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  dc dc
     A theoretical analysis on the performance of 5~12 V push pull switched capacitor DC DC converters is presented and the computer simulation on the device is described.
     对 5~12 V 推挽式开关电容 D C D C 变换器的性能进行了理论分析及计算机仿真。
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     The paper introduces the applications of modern control theories and several intelligent control methods in DC DC converter,then briefly analyzes their control features. Finally,we prospect the developing trend of the control of DC DC converter in the future.
     全面介绍了现代控制理论及智能控制方法在DCDC变换器中的应用,简要分析了各种控制方案的优缺点,并展望了DCDC变换器控制的发展趋势。
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     A switched capacitor DC DC converter working at Continuous Charging Mode(CCM) and Discontinuous Charging Mode(DCM) is presentedand its operation characters are studied. It is found that large output voltage ripple is accompanied with CCM.
     提出了稳态下开关电容DCDC变换器存在着连续充电模式(CCM)和不连续充电模式(DCM)两种情形,研究了在这两种模式下开关电容DCDC变换器的行为特点,指出在CCM下,这类变换器输出电压波动较大。
短句来源
     The output power of the switched capacitor DC DC converter is restricted by the capacitance of the series parallel(SP)capacitors and the switching frequency.
     开关电容DCDC变换器的输出功率受电容网络中电容取值及开关频率的限制,电容器的集成是开关电容DCDC变换器集成的关键。
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     Proper selection of the switching dead time of the lagging arm is necessary for ensuring the ZVS operation of the phase shifting FB ZVS DC DC converter.
     死区时间的合理选择是保证移相定频控制的全桥零电压开关DCDC变换器零电压开关状态的必要条件。
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  “dcdc”译为未确定词的双语例句
     In this paper a forward DC-DC converter with a LCD clamp circuit is propsed. The core is reset through this simple clamp circui t,and the efficiency of the converter is improved due to avoiding the energy los s.
     介绍了一种采用LCD箝位电路的正激DCDC变换器,它以十分简单的电路结构实现了变压器铁心的磁通复位,并且避免了能量的损耗,提高了变换器的效率。
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  相似匹配句对
     DC.
     DC.
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     DC.
     DC .
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     Gly.
     Gly。
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     S 100 protein staining is an important and reliable method to identify dendritic cells (DC).
     S100 蛋白染色是鉴定树突状细胞(DC) 的一种重要而可靠的方法。
短句来源
     Conclusion Our results suggest that TGF β1 is an inhibitory cytokine for the generation of DC precursors and maturation of DC from HPCs, which may account for the cellular mechanisms of TGF β1 mediated immuno suppressive functions in vivo and in vitro.
     结论TGFβ1介导的免疫抑制作用与其抑制DC的分化及功能成熟相关。
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  dcdc
Durch systematische Assoziationsuntersuchungen wurden 4 Kandidatengene, DCDC2, KIAA0319, DYX1C1 und ROBO1, entdeckt, die die neuronale Migration beeinflussen.
      
They can be classified into three rab family genes (Drab2, Drab5, Drab11) and five rho family genes (Drac1a, Drac1b, Drac3, Dcdc42, DrhoA).
      
Multiple roles of the Dcdc42 GTPase during wing development in Drosophila melanogaster
      
To investigate the functions of the Drosophila Cdc42 GTPase (Dcdc42), we generated phenotypes during wing development, by expression of the dominant-negative N17 and L89 mutants of Dcdc42.
      
We have identified roles for Dcdc42 in wing growth, and in cell fate choice during the development of the wing veins and the peripheral nervous system.
      
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A unified method for fast modelling of DC—DC switching converters in continuous conduction mode (CCM)is proposed in this paper. The validity, condition of modelling theory and new models for Cuk circuit as well other DC—DC switching converter given first. And then the variety and uniformity for modelling are given. Therefore, the problem of modelling for DCDC switching converters is to transfer the problem of variable structure system (VSS)analysis into the problem of circuit analysis containing compound...

A unified method for fast modelling of DC—DC switching converters in continuous conduction mode (CCM)is proposed in this paper. The validity, condition of modelling theory and new models for Cuk circuit as well other DC—DC switching converter given first. And then the variety and uniformity for modelling are given. Therefore, the problem of modelling for DCDC switching converters is to transfer the problem of variable structure system (VSS)analysis into the problem of circuit analysis containing compound dependence source. The method proposed in this paper is more convenient and better than that based on the state space averaged method.

本文提出了工作在连续导通情况下DC—DC开关转换器的快速建模的统一方法。首先论证了丘克电路建模理论的正确性和成立的条件,给出了丘克电路的新模型以及其余DC—DC开关转换器的新模型,同时指出了建模的多样性和统一性。因此,DC—DC开关转换器的建模问题可以把一个变结构系统(VSS)的分析问题转化为一个含复合受控源的电路分析问题。本文所提出的方法比状态空间平均法更方使和优越。

Hybrid IC's of DC-DC converter for aerospace applications are discussed. Based on the comparison of the performances of some circuits, an optimal topology of the DC-DC converter suitable for aerospace electronic systems is proposed. The control principle of PWM-linear converter is described. This technique is significant to ensure higher efficiency of secondary stabilizing DCDC converters and it can also greatly improve the yield of hybrid IC' s.

讨论了航天DC-DC混合集成电路的拓朴结构。通过对几种电路的性能比较,提出了适合航天应用的DC-DC变换器的最佳拓朴结构。论述了PWM-LIN变换器的控制方法,该方法对于确保二次稳压DC-DC变换器较高的效率具有重要意义,亦可大大提高混合集成电路的成品率。

Proposes a double cleavage dri1led compression (DCDC) specimen with fibre/matrix in-terface in modc I and analyses the mixed-mode by the boundary element method (HEM).Conducts the experiments on these DCDC specimens for CFRP composites in order to exam-ine the crack propagating behaviour and calculate the interfacial fracture energy at fibre/ma-trix interface. Confirms that DCDC specimen with the hole offset from the mid plane has amixed-mode stress distribution, and the effect of the mode...

Proposes a double cleavage dri1led compression (DCDC) specimen with fibre/matrix in-terface in modc I and analyses the mixed-mode by the boundary element method (HEM).Conducts the experiments on these DCDC specimens for CFRP composites in order to exam-ine the crack propagating behaviour and calculate the interfacial fracture energy at fibre/ma-trix interface. Confirms that DCDC specimen with the hole offset from the mid plane has amixed-mode stress distribution, and the effect of the mode E on interfacial fracture energyincreases with the offset value ; also when the offset value is zero, the mode I stress distribu-tion is obtained Shows the DCDC test is a useful method for evaluation the interfacial be-haviour of fibre-reinforced plastic materials. Concludes that both experimental and analyticalapproaches are needed to achieve a quantitative evaluation of the fibre/matrix interface.

使用纤维/树脂界面的复合材料试验片.来评价纤维增强复合材料的界面性能,首先利用边界无法对该试验一片进行受力分析,得到该试验一片具有Ⅰ型裂纹或Ⅰ,Ⅱ型复合裂纹的应力分布。再用边界元解析法求得正则化应力强度因子与裂纹长的关系,从而求得几何形状函数、结合实验数据,可定量评价复合材料各种界面的性能。

 
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