共查询到20条相似文献，搜索用时 203 毫秒
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ＣＬＴＡＮＤＬＩＬＦＯＲＴＨＥＳｔＡＴＩＯＮＡＲＹＳＥＱＵＥＮＣＥＯＦＡＤＯＵＢＬＹＳＴＯＣＨＡＳＴＩＣＴＩＭＥＳＥＲＩＥＳＡＲ－ＭＡＭＯＤＥＬＣＬＴＡＮＤＬＩＬＦＯＲＴＨＥＳｔＡＴＩＯＮＡＲＹＳＥＱＵＥＮＣＥＯＦＡＤＯＵＢＬＹＳＴＯＣＨＡＳＴＩＣ￥... 相似文献
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ＱＵＡＮＴＵＭＣＨＥＭＩＣＡＬＳＴＵＤＩＥＳＯＮＡＮＥＷＯＲＧＡＮＯＳＵＬＦＵＲＲＥＡＣＴＩＯＮＭＥＣＨＡＮＩＳＭＺｈｕＪｉｎ；ＣｈｅｎＹａ－ｌｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０... 相似文献
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ＭＥＡＳＵＲＥＭＥＮＴＯＦＳＯＤＡＣＴＩＶＩＴＹＢＹ~（１９）ＦＮＵＣＬＥＡＲＭＡＧＮＥＴＩＣＲＥＳＯＮＡＮＣＥ（ＮＭＲ）ＲＥＬＡＸＡＴＩＯＮＲＡＴＥＺｈａｏＢａｏ－Ｌｕ；ＣｈｅｎＹｕｎ－ＺｕｎａｎｄＸｉｎＷｅｎ－Ｊｕａｎ（ＩｎｓｔｉｔｕｔｅｏｆＢｉ?.. 相似文献
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ＴＨＥＭＵＬＴＩ─ＡＳＳＯＣＩＡＴＩＯＮＭＯＤＥＬＯＦＴＨＥＥＳＲ─ＡＣＩＤＩＴＹＳＥＮＳＩＴＩＶＥＦＲＥＥＲＡＤＩＣＡＬ：ＡＴＨＥＯＲＥＴＩＣＡＬＳＴＵＤＹ￥ＺｈｕＪｉｎａ；ＹａｎＪｉｎｇ；ＣｈｅｎＹａ－ｌｉｎｇ；ＺｈａｎｇＪｉａｎ－ｚｈｏｎｇ；Ｙ... 相似文献
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ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＴＨＥＩＮＴＥＮＳＩＴＹＯＦＴＨＥＥＡＲＴＨＳＭＡＧＮＥＴＩＣＦＩＥＬＤＤＵＲＩＮＧＱＵＡＴＥＲＮＡＲＹＦＲＯＭＶＯＬＣＡＮＩＣＲＯＣＫＳＩＮＥＡＳＴＥＲＮＣＨＩＮＡＬｉＣｈｕｎｊｉｎｇ；ＺｈｕＲｉｘｉａｎｇ（Ｉｎｓｔｉ... 相似文献
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ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＣＹＡＮＩＤＥＢＹＡＳＰＥＣＴＲＯＰＨＯＴＯＭＥＴＲＩＣＲＥＶＥＲＳＥＤＦＬＯＷＩＮＪＥＣＴＩＯＮＭＥＴＨＯＤ￥ＪｉｎｇｆｕＬｉｕａｎｄＨｕｉｃｈａｎｇＭａ（ＲｅｓｅｔｒｃｈＣｅｎｔｅｒｆｏｒＥｃｏ－Ｅｎｖｉｒｏｎｍｅｎ... 相似文献
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ＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＳＯＦＣＨＡＲＧＥＴＲＡＮＳＦＥＲＳＡＬＴＳ（ＴＴＭＴＴＦ）_２Ｃｕ_２Ｃｌ_６ＡＮＤＣ_（４０）Ｈ_（７２）Ｎ_６Ｓｅ_４ＮｉＣｈｅｎＸｕｅ－ａｎ；ＹａｎｇＸｕｅ－ｙｏｎｇ；ＷｕＰｅｉ－ｊｉ；ＺｈｕＤａｏ－ｂｅｎ；ＦｕＨｅ?.. 相似文献
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ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＣＹＣＬＯＴＲＩＭＥ－ＴＨＹＬＥＮＥＴＲＩＮＩＴＲＡＭＩＮＥＩＮＳＥＲＵＭＯＦＲＡＢＢＩＴＢＹＲＰ－ＨＰＬＣＣｈｅｎＹｏｎｇ；ＹｕａｎＺｈｕｏ－ｂｉｎ（ＧｒａｄｕａｔｅＳｃｈｏｏｌ，ＡｃａｄｅｍｉａＳｉｎｉｃａ．Ｂｅｉｊ... 相似文献
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ＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥ￥ＧｕｏＹｕ－ｂｉｎ；ＬｉＦｕ－ｔｉａｎ（ＣｈａｎｇｃｈｕｎＩｎａｔｉｔｉｄｅｏｆＯｐｔｉ... 相似文献
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ＩＳＯＰＲＯＰＹＬＩＤＥＮＡＴＩＯＮＯＦＭＯＮＯＳＡＣＣＨＡＲＩＤＥＳＣＡＴＡＬＹＺＥＤＢＹＳＯＬＩＤＰＨＡＳＥＴｉＣｌ＿４ＩＳＯＰＲＯＰＹＬＩＤＥＮＡＴＩＯＮＯＦＭＯＮＯＳＡＣＣＨＡＲＩＤＥＳＣＡＴＡＬＹＺＥＤＢＹＳＯＬＩＤＰＨＡＳＥＴｉＣｌ＿４￥... 相似文献
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We introduce a new model for contact angle saturation phenomenon in electrowetting on dielectric systems. This new model attributes contact angle saturation to repulsion between trapped charges on the cap and base surfaces of the droplet in the vicinity of the three-phase contact line, which prevents these surfaces from converging during contact angle reduction. This repulsion-based saturation is similar to repulsion between charges accumulated on the surfaces of conducting droplets which causes the well known Coulombic fission and Taylor cone formation phenomena. In our model, both the droplet and dielectric coating were treated as lossy dielectric media (i.e., having finite electrical conductivities and permittivities) contrary to the more common assumption of a perfectly conducting droplet and perfectly insulating dielectric. We used theoretical analysis and numerical simulations to find actual charge distribution on droplet surface, calculate repulsion energy, and minimize energy of the total system as a function of droplet contact angle. Resulting saturation curves were in good agreement with previously reported experimental results. We used this proposed model to predict effect of changing liquid properties, such as electrical conductivity, and system parameters, such as thickness of the dielectric layer, on the saturation angle, which also matched experimental results. 相似文献
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F.M. Clark 《Journal of The Franklin Institute》1933,216(4):429-458
Throughout this paper data have been presented showing that the apparent inconsistency of the reported dielectric strength behavior of insulating liquids can be satisfactorily correlated if proper consideration be given to the state of the “purity” of the liquid itself. As a result it is suggested that insulating liquids should be classified as (a) “pure,” indicating those liquids free from dissolved gases as primary “impurities”; and (b) “impure,” including those liquids which contain dissolved gas. The breakdown mechanism depends on the distinctive behavior of these two general classes. “Pure” liquid breakdown is a function of charged particle formation. In part, this may be caused by the assumption of a charge by molecular aggregates, colloidal-like in nature. In part, the charge may arise from molecular ionization by collision. The latter occurs chiefly in the voltage range immediately preceding electrical rupture and is the chief cause of “pure” liquid insulation failure. The presence of the first type of charge—that is, the existence of a difference of potential between molecular aggregates and the liquid—is chiefly responsible for the variation in the time factor to breakdown.The breakdown of “impure” liquids is a function of dissolved gas elimination. This dissolved gas is eliminated as a result of changing solubility produced (a) by electro-striction effects, or (b) by changing pressure or temperature. The presence of secondary impurities such as dust particles and fibers, acts chiefly through the effect on increasing gassing tendencies.It is suggested further that the localization of dielectric breakdown in liquids, irrespective of the type or degree of “purity,” is chiefly in the “neutral membrane” located near the electrodes and formed by the discharge of particles. Such a “neutral membrane” results in a space charge effect giving marked drop in potential and as a result promoting ionization by collision effects in “pure” liquids and electro-striction effects in “impure” liquids. 相似文献
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摩擦表面形貌研究中的分形理论 总被引：1，自引：0，他引：1
摩擦表面的几何特征采用形貌参数描述,基于分形理论及ｎ维分形布朗运动,提出用分形数来描述摩擦表面的几何特征,并证明其反映了摩擦表面形貌的地序程度。 相似文献
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将 Julia曲线"按正方形形状以多种方式进行量化,并将量化的 Julia曲线 "用于分形图像压缩编码,改变了分形图像压缩编码以变化的压缩编码字典进行编码的缺点。此外,还建立了一个小型的常用字典,用以加速分形图像的压缩编码。实验结果表明, Julia曲线 "能很好地拼贴所要编码的图像,并具有分形图像的解码优点。 相似文献
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核态沸腾中汽化核心密度的分形分布 总被引：1，自引：0，他引：1
本文首先回顾了在核态沸腾传热中影响汽化核心密度分布的几个关键因素，然后运用分形理论讨论了加热壁面微结构和汽化核心密度之间的关系并分析了两个核态沸腾实验中汽化核心密度的数据。一个实验是考察加热壁面在老化过程中汽化核心密度的变化，另一个实验是考察两个不同材料制成的加热壁面上汽化核心密度的差异。实验数据分析结果表明汽化核心密度与最小成核半径之间呈分形关系。不同加热壁面对应不同的分形维数，分形维数是一个定量描述加热壁面状况的参数。 相似文献
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针对分形编码算法编码时间太长、精度控制需要细分等缺点提出对编码图像进行分级逼近的新的分形编码算法．对这一思想的可行性在理论上进行了有益的探索,给出了该算法成立的理论基础,并得出了任给一图像,都可以找出一组压缩变换,使得从任意图像出发,经该组变换压缩迭代后重构原始图像的新的构造性证明．给出一个新的具体实现分形编码的算法．实验表明,在提高压缩比和图像恢复质量的同时,运算时间也大大缩短 相似文献
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Dielectric breakdown is a common problem in a digital microfluidic system, which limits its application in chemical or biomedical applications. We propose a new fabrication of an electrowetting-on-dielectric (EWOD) device using Si3N4 deposited by low-pressure chemical vapor deposition (LPCVD) as a dielectric layer. This material exhibits a greater relative permittivity, purity, uniformity, and biocompatibility than polymeric films. These properties also increase the breakdown voltage of a dielectric layer and increase the stability of an EWOD system when applied in biomedical research. Medium droplets with mouse embryos were manipulated in this manner. The electrical properties of the Si3N4 dielectric layer—breakdown voltage, refractive index, relative permittivity, and variation of contact angle with input voltage—were investigated and compared with a traditional Si3N4 dielectric layer deposited as a plasma-enhanced chemical vapor deposition to confirm the potential of LPCVD Si3N4 applied as the dielectric layer of an EWOD digital microfluidic system. 相似文献
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