摘要：A novel layout has been proposed to reduce the single event upset(SEU) vulnerability of SRAM *** 3-D technology computer-aided design(TCAD) simulation analyses show that the proposed layout can recover the upset-state much easier than conventional layout for larger space of PMOS *** the angle incidence,the proposed layout is immune from ion hit in two plans,and is more robust against SEU in other two plans than the conventional *** ability of anti-SEU is enhanced by at least 33% while the area cost reduced by 47%.Consequently,the layout strategy proposed can gain both reliability and area cost benefit simultaneously.

摘要：Using Technology Computer-Aided Design(TCAD) 3-D simulation,the single event effect(SEE) of 25 nm raised source-drain FinFET is *** on the calibrated 3-D models by process simulation,it is found that the amount of charge collected increases linearly as the linear energy transfer(LET) increases for both n-type and p-type FinFET hits,but the single event transient(SET) pulse width is not linear with the incidence LET and the increasing rate will gradually reduce as the LET *** impacts of wafer thickness on the charge collection are also analyzed,and it is shown that a larger thickness can bring about stronger charge *** reducing the wafer thickness could mitigate the SET effect for FinFET technology.

摘要：A novel off-state gate RHBD technique to mitigate the single-event transient(SET)in the differential data path of analog circuit is demonstrated in this *** results present that this off-state gate technique could exploit charge sharing in differential circuits and reduce differential mode voltage perturbation *** is indicated that this technique is more effective to mitigate SET than the differential charge cancellation(DCC)technique with less penalty.

摘要：Since single event transient pulse quenching can reduce the SET(single event transient) pulsewidths effectively,the charge collected by passive device should be maximized in order to minimize the propagated *** the perspective of the layout and circuit design,the SET pulsewidths can be greatly inhibited by minimizing the layout spacing and signal propagation delay,which sheds new light on the radiation-hardened ICs(integrated circuits) *** show that the SET pulsewidths of propagation are not in direct proportion to the LET(linear energy transfer) of incident particles,thus the defining of the LET threshold should be noted when SET/SEU(single event upset) occurs for the radiation-hardened *** capability of anti-radiation meets the demand when LET is high but some soft errors may occur when LET is ***,radiation experiments should be focused on evaluating the LET that demonstrates the worst response to the circuit.

摘要：基于TCAD(Technology Computer-Aided Design)3-D模拟,研究了25 nm鱼鳍型场效应晶体管(Fin Field Effect Transistor,FinFET)中单粒子瞬态效应的工艺参数相关性。研究表明一些重要工艺参数的起伏会对电荷收集产生显著影响,从而影响到电路中传播的SET(Single Event Transient)脉冲宽度。对于最佳工艺拐角,离子轰击后收集的电荷量可以降低约38%,而在最坏工艺拐角下,收集的电荷量则会增加79%。这些结论对FinFET工艺下的SET减缓及抗辐射加固设计提供了一种新的思路。

摘要：在研究岩体裂隙间的渗流特性时,节理粗糙度会影响裂隙水流的渗流特性和路径,因此需要对粗糙表面进行恰当的描述。本文选取伸长率、最大起伏高度、最大起伏角和分维数4个参数刻画粗糙度。结合分维数的计算方法,选择当最大起伏高度为2.5mm、节理宽度为5mm时,随机生成4组直线和曲线节理边界。建立二维模型模拟发现,最大起伏角、伸长率和分维数是影响水流流速分布的敏感因素。在节理最高起伏处的下边界,流速值最大。此外,粗糙度的方向性对渗流影响较大。同等节理条件下,可发现沿水流方向,最大起伏高度的位置越靠后,越能抑制最大流速值,从而减小渗流破坏。最后,根据规则锯齿状的节理试验分析表明,在外力条件下,渗流量一定时,节理通道一旦发生改变,内部形成的漩涡便与水流的有效路径呈现负相关关系。

摘要：存在于混凝土中的冷缝,直接影响混凝土结构的整体性能.通过对不同龄期间隔的冷缝,及不同弹性模量混凝土叠合形成的带冷缝的混凝土进行抗压和劈拉试验,研究其力学性能的变化规律.试验结果表明:带冷缝混凝土试件整体抗压强度及冷缝黏结面黏结强度均随龄期增长逐渐减弱,新混凝土强度提升,可有效提高带冷缝混凝土的抗压强度,而对黏结面强度提升较为有限;通过计算岩石脆性特征系数发现,新混凝土强度提升可有效提高新旧混凝土抗变形能力;并建立了冷缝黏结面强度计算公式,可以较好地预测冷缝黏结面的黏结强度.当龄期间隔7~14 d,新、旧混凝土弹性模量之比为1.10时力学性能较好,龄期间隔超过28 d时,新、旧混凝土弹性模量之比应小于1.10.

摘要：初始缺陷会对钢纤维增强水泥基复合材料(SFRCC)的力学性能产生较大影响。通过参数化语言,建立了由钢纤维、水泥砂浆基体及界面过渡区构成的二维SFRCC模型,布置了界面、砂浆、表面和三处同时存在的四种初始缺陷类型,并结合Weibull分布函数建立非均质模型,模拟了不同初始缺陷下非均质SFRCC试件单轴拉伸破坏的过程。结果表明:不同类型初始缺陷对不同平均方向效应系数SFRCC材料抗拉强度影响程度不同;探究了不同类型初始缺陷对SFRCC材料细观单元力学性能的影响;揭示了非均质SFRCC材料存在不同初始缺陷时的拉伸损伤过程及破坏机理。

摘要：对某普通纵向承轨台短轨枕无砟轨道道床断裂伤损特征、轨道静态几何形位和机械化整治技术进行了分析研究。通过现场调研,明确了道床断裂伤损特征,其伤损主要表现为道床横向断裂/掉块/露筋、钢轨波磨/擦伤、轨枕纵向断裂/松动、道床下部出现离缝等现象。轨道静态测试分析结果表明,道床断裂位置的曲线正矢、轨距、轨底坡、钢轨顶面纵坡均有不同程度异常。最终针对道床断裂伤损,提出了可行的机械化整治技术方案,整治效果良好。