刮板转载机联接头的改进设计

阐述了目前刮板转载机联接头所存在的问题,针对这些问题,改进设计了一种新式的联接头,结果表明,改进设计后,提高了刮板转载机联接头的可靠性,为圆环链的持续预紧提供了有力的保障,实现了煤矿井下的安全高效生产。     

桩土复合路基静载试验改进方法研究

静载试验作为复合路基的一种重要检测手段而广泛应用,然而,在工程质量检测中,常出现检测结果与实际情况不符的情况,除人为操作因素外,垫层模拟过于简单是主要原因。借助引入弹性垫层,提出一种桩土复合路基静载试验改进方法。首先,基于数值模拟计算,建立复合路基桩土应力比n和桩土相对位移Δs、弹性垫层厚度h和弹性垫层模量E的函数关系;其次,通过模拟结果和路堤荷载结果对比,确定不同桩型复合路基静载试验中弹性垫层参数选择范围,最后,利用现场对比试验和实测结果,论证桩土复合路基静载试验改进方法的正确性和可靠性。     

Does interior color contrast enhance spatial memory?

This study investigated the effect of contrast in neutral-, warm-, and cool-colored spaces on spatial memory. Spatial memory was measured in terms of architectural scale and recollection of architectural elements and furniture. Participants (N = 114) viewed a short virtual simulation video of a residential studio and were asked to sketch a map of the architectural elements on distributed grid paper. Spatial memory was measured in terms of scale, and item recall rate. Contrast and hue had no significant effect on the memorization of proportional scale. However, high-contrast schemes allowed for a significantly higher recollection of architectural elements than low-contrast schemes. In comparing the effect of hues, a significant difference was seen in recalling detailed furniture and lighting items. Participants reported significantly better spatial memory of neutral and warm color schemes than of cool color schemes. There was no interaction effect between contrast and hue in the color combinations. These results can be applied in the design of color schemes for architectural spaces requiring enhanced spatial cognition and memory.     

长距离伪斜机头旋转开采技术研究

针对负伪斜状态下综采工作面机头旋转开采过程中存在的问题，通过对工作面1号支架进行精确定位安装、采取合理的调斜和进刀方式等技术工艺，解决了负伪斜旋转开采过程中工作面支架和输送机容易下窜的技术难题。该技术的成功应用，提高了工作面的采出率，为综采工作面旋转机头开采提供了技术参考。     

两个大型住宅项目设计配套消防备供电源供电方案分析及优劣对比

通过对两个大型住宅项目配置消防备供电源供电方案进行对比,分析由此产生的建设安装造价成本高低,以及后期物业管理程序的难易程度,总结出适宜于大型住宅项目的消防备供电源供电方案,既能降低建设投资成本,又可以简化后期物业管理程序,更好地保障消防系统供电安全,值得推广。     

改进模糊划分聚类的协同过滤推荐算法

针对传统协同过滤（CF）推荐算法存在评分矩阵稀疏、扩展性弱和推荐准确率低的缺陷，提出一种改进模糊划分聚类的协同过滤推荐算法（GIFP-CCF+）。在传统基于修正余弦相似度计算方法上，引入时间差因子、热门物品权重因子以及冷门物品权重因子以改善相似度计算结果；同时引入改进模糊划分的GIFP-FCM算法，将属性特征相似的项目聚成一类，构造索引矩阵，同索引间根据项目间的相似度寻找项目最近邻居构成推荐，从而提高协同过滤算法（CF）的精度。通过与Kmeans-CF、FCM-CF和GIFP-CCF算法进行仿真对比实验，证明了GIFP-CCF+算法在推荐结果和推荐精度上具有一定的优越性。     

Variable stage-independent double sampling plan with screening for acceptance quality loss limit inspection scheme

The quality loss suggested by Taguchi has been recognised as a new quality evaluation based on variable property instead of the quality evaluation based on traditional attribute property such as the proportion of nonconforming items. Some variable sampling inspection plans in order to assure the quality have been considered. As one of those sampling inspection plans, the single sampling plan with screening (SSPS) has been constructed for acceptance quality loss limit inspection scheme. Further, the repetitive group sampling plan with screening (RGSPS) has been developed for reducing the average total inspection (ATI). Although ATI by RGSPS has successfully been reduced in comparison with ATI by SSPS, RGSPS may sometimes increase the average sampling frequency (ASF) in return for reducing ATI. In this study, the stage-independent double sampling plan with screening (SIDSPS) based on the concept of the acceptance quality loss limit inspection scheme is proposed under the consideration of the trade-off between ATI and ASF. Through some numerical comparisons about ATI and ASF in SSPS, RGSPS, and SIDSPS, the usefulness of SIDSPS proposed in this study is confirmed.     

渤海油田复杂压力动态调控技术研究

渤海湾蓬莱油田多年注水开发，储层压力系统复杂，层间矛盾突出，小层间压力差更是达到3~4 MPa。复杂压力体系将导致调整井钻完井复杂情况频发，蓬莱油田多口调整井出现了高压层溢流、低压层漏失等井控情况，严重影响着钻完井作业效率和费用。合理的注采井关调方案是保证调整井安全高效作业的重要手段。基于此背景，利用注水井和采油井生产动态数据，建立了注水指数和产液指数的概念，并基于卡尔曼滤波算法创新性地建立了判断注采关系的新方法，同时结合实际注水井关井压降规律，建立了基于注采关系估计和关井压降规律的注采井关调制度。该研究成果在PL19-3-V41井应用，钻进过程安全顺利，单井少停注水7 000 m³。提出的复杂压力动态调控技术能够为周边注水井关调方案提供科学依据，经济效益显著。     

老矿山残矿资源回收方案设计中三维探测及建模技术的应用

目前我国绝大多数中小型老矿山残矿回收面临一系列问题，包括资料缺失无法准确判定老采空区及剩余资源位置，无法准确掌握剩余资源形态及可回收量，回收方案设计与实际资源相差较大等。通过将三维探测及建模技术应用于老矿山残矿资源精准定位及回收方案设计中，有助于解决以上问题。以福建浦城屏峰硫铅锌矿为例，通过对老采空区采用三维激光扫描构建采空区三维模型，结合三维建模计算，构建了目前可回收的剩余资源三维模型。通过模型划分及切割，按照矿体实际形态，在三维模型中布设采切及穿孔工程，并将其导入平面施工图中，不仅可以减少设计工作量，而且能够精准匹配矿体，减少设计偏差。由于周边存在大量老采空区，为保障安全，在采空区及剩余资源精准三维模型的基础上，制定了采空区稳定性监测方案，布设了监测传感器，保障了资源回收安全。