Color control of the multi-color printing device

INTRODUCTION During the development of printing technology, digital printing has played an important role. Now various kinds of multi-color digital inkjet printers are available. Compared with the conventional digital inkjet printer, the multi-color digital inkjet printer has larger color gamut and can faithfully produce more colors. The conventional color printing devices nor- mally use three or four inks, e.g., CMY, CMYK. Although some adopt more than four inks, e.g., CMYKLcLm, the…     

ON EUPHEMISM

Euphemism is defined in Longrnan Dictionary of Con-temporary EngIish (l978) as .' (an example of ) the use ofa pleasanter, less direct name for sorneth1ng thought tobe unpleasant. "The New Edition of the Oxford ConciseDictionary (1976) defines euphemism as "Substitution ofmild or vague or roundabout expression for harsh or di-rect one; expression thus substituted. "In Webster's NewColIegiate Dictionary (l973) the definition of euPhemismreads, "substitution of an agreeable or inoffensive …     

充分发挥投影仪在数学教学中的作用

本文围绕全面提高教学质量和效率，落实素质教育，从四个方面阐述了投影仪在数学教学中的应用。     

时钟设计问题的探讨

本文探讨了PLD设计过程中4个不同的时钟设计方案,对这些不同方案的优点、缺点和在设计过程中需注意的问题进行了分析,并提出了几个合理的建议.     

单层单极聚合物发光器件中的输运性质

假设载流子浓度按指数关系变化,认为注入电流为热电子电流和隧穿电流,通过引入电荷空间分布特征长度和有效迁移率,讨论了单层单极聚合物发光器件内部的输运性质.结果表明:(1)电荷空间分布特征长度对器件中的电场强度,电流有很大影响;(2)载流子迁移率在注入电极附近减小,而在另一电极附近增加.本文对这些现象给予了解释.     

偏心螺旋传动试验台的研制及应用

偏心螺旋传动试验台是一种新型的螺旋传动试验台,有其独特的传动原理、结构、试验方法及其应用。     

慢启动半导体激光器驱动电源的设计

根据半导体激光器的光功率与电流的关系,通过慢启动电路、纹波调零电路、功率稳恒电路等解决了使用中的电源在工作温度范围内其输出功率不稳定的问题。设计的电路稳定度达到4×10-4。     

微波合成半导体HgS纳米粒子

在甲醛溶液中，以Hg(Ac)2和TAA为原材料，通过微波加热合成了HgS半导体纳米粒子，并用XRD、TEM、紫外光谱进行了表征。     

Hg_2Br_2声光器件换能器的频率特性

提出用环氧树脂聚合物作为换能器与Hg2Br2声光介质的缓冲层(粘接层),设计Hg2Br2声光器件的换能器三层和五层结构.根据换能器等效电路网络分析法,就x切LN/Hg2Br2声光器件三层结构和五层结构的损耗TL随规一化频率f/f0的变化关系及相应结构下输入阻抗与规一化频率f/f0的变化关系进行了计算并给出了结果.     

Effect of a distal protection device on epicardial blood flow and myocardial perfusion in primary percutaneous coronary intervention

Objective: The beneficial effect of percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI) has been well established, but there is the problem of no-reflow phenomenon which is an adverse prognostic factor in primary PCI. In the present study the effect of a distal protection device (PercuSurge GuardWire; GW) on epicardial blood flow and myocardial perfusion was evaluated. Methods and Results: Patients with AMI were randomly divided into 2 groups, the GW and the control groups. The GW group included 52 patients with AMI who underwent primary PCI with GW protection and the control group included 60 patients who underwent primary PCI without GW protection. Epicardial blood flow in the infarct-related artery (IRA) and myocardial perfusion were evaluated according to the thrombolysis in myocardial infarction (TIMI) flow grade and the myocardial blush grade (MBG). We found TIMI score of 3 was obtained significantly more frequently in the GW group (96%) than in the control group (80%). The MBG score of 3 was obtained also significantly greater in the GW group (65%) than in the control group (33%). Conclusion: Primary PCI with GW protection can significantly improve epicardial blood flow and myocardial perfusion.