摘要：浇筑式沥青混凝土是新建碾压式混凝土坝和渗漏严重的病险坝修补的一种有效的防渗结构。本文针对沥青混凝土原材料的性能特性,探讨了浇筑式沥青混凝土防渗层混合料配合比的设计方法。并结合工程实例对设计方法进行了可行性论证。

摘要：应用APDL语言设计一种新型的三维槽帮形状计算算法,通过循环调用前处理、求解和后处理模块,自动调整三维槽帮表面节点坐标,实现铝电解槽三维槽帮形状的计算。选择成熟的180kA铝电解槽作为研究算例,在有限元软件ANSYS的平台上建立四分之一槽电热模型,并引入热接触来描述熔体与槽帮、阳极和阴极等之间的对流传热,进行三维槽帮的数值仿真研究。采用这种三维计算方法可以更加真实的考虑铝电解槽的结构和工艺参数情况,电热耦合计算又将电场对热场的影响考虑在内,更加符合实际情况。研究结果表明:该算法得到的槽帮形状与实测结果基本一致,同时验证铝电解槽槽帮在小面厚度大于大面厚度,而在角部处槽帮最厚的规律。该方法可为新型铝电解槽设计提供技术支撑。

摘要：岩土工程受力变形演化是一个典型的非线性问题,其演化的高度非线性和复杂性,很难用简单的力学、数学模型描述,但可用粒子群优化径向基神经网络对岩土工程应力、位移非线性时间序列进行动态实时预测。网络径向基层的单元数通过均值聚类法确定后,所有其它参数:中心位置、形状参数、网络权值,均通过粒子群优化算法在全局空间优化确定。工程实例应用表明,该模型预测结果准确、精度高,有良好的应用前景。

摘要：从江苏无锡地区屋顶广告牌的现状出发,结合几个屋顶广告牌钢结构检测和鉴定的工程实例,阐述了屋顶广告牌的质量问题。

摘要：No shale-rock physical model has been established in the observation coordinate *** this end,this paper carried out anisotropic wave velocity tests on shale rock and compared the Thomsen,Daley,and Berryman solutions to characterize anisotropic acoustic wave ***,the Daley solution was *** on basic rock physical models,such as SCA and DEM methods,and combined with the Daley solution,an anisotropic shale-rock physical model was established in the observation coordinate system and applied in Well B1 in the Luzhou area,Sichuan *** research conclusions were as follows:*** the samples from the same core,the P-wave velocities in three directions were in the order VP11>VP45>VP33,shear wave velocity VS11 was the largest,but VS33 and VS45 did not follow the law of Vs33>Vs45 for some samples;*** Daley solution,which not only considers the accuracy requirements but also has a complete expression of P-,SV-,and SH-waves,is most suitable for characterization of anisotropic wave velocity in this study area;*** rock physical model constructed in the observation coordinate system has high accuracy,in which the absolute value of the relative error of the P-wave slowness was between 0%and 5.05%(0.55%on average),and that of shear-wave slowness was between 0%and 6.05%(0.59%on average);*** acoustic waves recorded in Well B1 in the observation coordinate system were very different from those in the constitutive coordinate *** relative difference of the P-wave was between 6.76%and 30.84%(14.68%on average),and that of the S-wave was between 7.00%and 23.44%(13.99%on average).The acoustic slowness measured in the observation coordinate system,such as in a deviated well or a horizontal well section,must be converted to the constitutive coordinate system before it can be used in subsequent engineering applications;*** anisotropic shale-rock physical model built in the observation coordinate system proposed in this paper can provide basic data a

摘要：为解决可锻铸铁生产导磁体时生产周期长、退火困难等问题 ,经过多次实验 ,改用球墨可锻铸铁生产导磁体 ,其各项性能均符合设计要求 ,且生产周期短。

摘要：为提高参数自动判读的效率,增强设备单机状态诊断的时效性和准确性,提出一种基于边缘计算和变精度粗糙集(VPRS)的运载火箭设备单机双层判读与实时诊断方法。首先构建了边缘层-判读服务器层的双层判读架构。然后,基于边缘计算技术设计了边缘层判读方法,对参数原始数据进行阈值判断与数据筛选。随后,在判读服务器层,定义AIPL(AutoIP Language)判据描述语言设计高阶判据并进行高阶判读;基于VPRS建立了实时诊断模型,对设备单机的历史数据进行约简,挖掘出了简化后的状态诊断规则。最后,以XX火箭设备单机遥测数据自动判读系统升级改造为例,验证了所提方法的可行性与有效性。

摘要：为了提高太赫兹辐射强度,设计了带THz扼流圈的偶极天线阵列.模拟结果表明,增加直线阵的阵元数对平均匹配效率影响很小,却能线性增加相干辐射强度.加入THz扼流圈可减小进入到传输线的交流分量,进而减小共振频率的偏移,使平均匹配效率提升了两倍.相比于网格排列的平面阵,交错排列的阵元在垂直方向上具有更小的耦合,THz发射谱更窄.通过使用聚酰亚胺透镜代替硅透镜,可有效提高输入电阻,并将总效率由25%提高到35%.

摘要：九甸峡水利枢纽工程混凝土面板堆石坝最大坝高136.5 m,坝址区地震烈度高,河谷狭窄,岸坡陡峻,河床分布深52～54 m、宽30～50 m左右的深厚覆盖层,为目前国内在深厚覆盖层修建的最高面板堆石坝.文中介绍了该混凝土面板堆石坝的布置、坝体分区、坝料设计、趾板结构、周边缝结构设计等,特别研究比较了河床深厚覆盖层平趾板处理措施和采取防渗墙截渗的结构特点,同时对于在覆盖层上修建高面板堆石坝进行了有益的探索.

摘要：建立了铸铁水平连铸用结晶器水冷套的传热模型 ,并用有限差分法模拟计算了不同高宽比水道结构的水冷套系统传热过程。水道高宽比K值对水冷套冷却能力的影响规律是 :K值增加 ,水道内水流速、等效传热面积均减小 ,水套的冷却能力降低。